The Albright HV500AF-47S 24V DC PWM + Auxiliary (NC) is a high-performance solid-state relay designed to cater to specific and demanding applications requiring precise control and high reliability. This device is part of Albright’s HV500 series, known for its robust design and advanced technology, making it suitable for critical applications such as electric vehicles, renewable energy systems, and industrial machinery.
Key Specifications and Features:
Voltage Rating:
The HV500AF-47S is specifically rated for 24V DC applications. This makes it particularly useful in systems where lower voltage levels are essential, such as in certain automotive, solar, and industrial environments.
Pulse Width Modulation (PWM):
The relay supports PWM control, which is crucial for managing power efficiently and maintaining smooth operation. PWM allows for variable power delivery, reducing wear on components and increasing the overall efficiency of the system. This control mechanism is essential for systems that require fine-tuned power adjustments and enhanced energy savings.
Auxiliary Contacts (NC):
The HV500AF-47S includes Normally Closed (NC) auxiliary contacts. These contacts provide an additional layer of control and monitoring, useful in safety circuits or for feedback to a control system. The NC contacts ensure that the circuit remains closed and operational until a certain condition is met, which then opens the circuit, providing a safety mechanism or an alert to the system.
Durability and Reliability:
Constructed from high-quality materials, the HV500AF-47S is designed to operate reliably in harsh environments. Whether it’s extreme temperatures, dust, moisture, or vibration, this relay maintains consistent performance. Its robust design ensures longevity and reliability, critical for systems where maintenance access may be limited.
Safety Features:
The device is engineered with built-in overcurrent protection and arc suppression. These features protect both the relay and the connected equipment from damage due to electrical faults, making the HV500AF-47S a safe choice for sensitive applications.
Compact Design:
The compact form factor of the HV500AF-47S allows for easy integration into existing systems, even in space-constrained environments. Despite its small size, it delivers the high performance and reliability expected from Albright products.
Applications:
The versatility of the HV500AF-47S makes it ideal for a wide range of applications. It is particularly well-suited for electric vehicles, where reliable DC control is crucial for battery management and motor control. In renewable energy systems, it can be used for managing power flow in solar inverters or wind turbines. Additionally, in industrial machinery, it offers precise control in automation systems, enhancing efficiency and reducing downtime.
Summary
The Albright HV500AF-47S 24V DC PWM + Aux (NC) relay is a powerful and reliable component designed for precision control in a variety of demanding applications. Its features, such as PWM control, NC auxiliary contacts, and robust design, make it a top choice for industries requiring high reliability and precise power management. By integrating this relay into your system, you not only improve operational efficiency but also ensure a safer and more durable setup, aligning with the best practices in modern electrical engineering.
Albright SW180-4 – 24V DC Continuous (CO) Solenoid Contactor, SPST-NO
The Albright SW180-4 is a heavy‑duty DC contactor designed for reliable switching of motors and other DC loads. This single‑acting, single‑pole, normally‑open contactor features silver‑alloy double‑breaking tips for long life and low resistance, with a 24VDC continuous (100% duty) coil.
Key Features
Series: SW180 (single-acting)
Coil: 24 VDC, Continuous (100% duty)
Configuration: SPST, Normally Open (N/O)
Main terminals: M8 studs
Coil terminals: 6.3 mm spade connectors
Mounting: M5 tapped holes or optional steel bracket
Orientation: Horizontal or vertical (studs up recommended)
Typical applications: Forklifts, pallet movers, scissor lifts, tow tugs, golf carts, winches, EV conversions, industrial DC systems
Ratings & Performance
Thermal current (Ith)
150 A
Application rating
Interrupted: 150 A | Uninterrupted: 200 A
Typical voltage drop @150 A
~30 mV (per pole)
Breaking capacity (UL583 guide)
Up to 1000 A (48 V DC) for SW180
Operating temperature
-40 °C to +60 °C
Mechanical durability
> 5 million operations
Coil pull-in (typ.)
≤ 66% of rated coil voltage (continuous type)
Drop-out (typ.)
10–25% of rated coil voltage
Weight (approx.)
~0.64 kg
What’s Included
1 × Albright SW180-4 contactor (24V DC, continuous)
Note: Mounting bracket and auxiliary contacts, if required, are sold separately.
Dimensions
Compact footprint for easy panel or chassis mounting. See manufacturer datasheet for detailed dimensions and drilling pattern.
Compatibility & Use
Suitable for resistive, capacitive, and inductive DC loads
Common in OEM and aftermarket service for material handling and utility EVs
Check coil voltage (24 VDC) and current ratings against your application
Installation Notes
Use appropriately rated cable/busbar and protective devices
For vertical mounting, orient with M8 studs upward (contact us if studs-down is required)
Observe polarity if optional suppression or blowouts are used
SW180-448L 24V Intermittent, 150 Amp
Intermittent contactors by design are predominantly used for hydraulic functions on vehicles, they make and break quicker than continuous solenoids and are not recommended for prolonged contact periods.
The SW180 has been designed for direct current loads, including motors as used on electric vehicles such as industrial trucks. Developed for both interrupted and uninterrupted loads, the SW180 is suitable for switching Resistive, Capacitive, and Inductive loads.
The SW180 features single pole single throw, double breaking main contacts with silver alloy tips, which are weld resistant, hardwearing and have excellent conductivity. The SW180 has M8 stud main terminals and 6.3mm spade coil connections. It can be mounted via M5 tapped holes or steel mounting brackets - supplied as separate items). Mounting can be horizontal or vertical, when vertical the M8 contact studs should point upwards.
SW180-954L Albright 150A 12V INT 1-pole 1-throw Contactor
SW180-954L, a SW180L series of contactors, equipped with magnetic blowouts - B and larger contact tips (L) and has been designed for direct current loads, including motors as used on electric vehicles such as industrial trucks
SW180AB-48 Continuous contactors by design are predominantly used for drive functions on vehicles, they make and break slower than intermittent solenoids and are recommended for prolonged contact periods.
info: image of SW180A-48 which is exact same external look, this SW180AB-48 has B as extra = blowout magnets inside the top cover
The SW180AB has been designed for direct current loads, including motors as used on electric vehicles such as industrial trucks. Developed for both interrupted and uninterrupted loads, the SW180B is suitable for switching Resistive, Capacitive, and Inductive loads.
The SW180AB features single pole single throw, double-breaking main contacts with silver alloy tips, which are weld resistant, hardwearing, and have excellent conductivity. The SW180B has M8 stud main terminals and 6.3mm spade coil connections. It can be mounted via M5 tapped holes or steel mounting brackets - supplied as separate items). Mounting can be horizontal or vertical, when vertical the M8 contact studs should point upwards.
Genuine SW180B-4 ALBRIGHT 24V 150A CO DC - COntactor. The SW180B-4, a SW180 series of contactor, equipped with magnetic blowouts - B) has been designed for direct current loads, including motors as used on electric vehicles such as industrial trucks. SW180
SW180B-448L Albright 150A 12V INT 1-pole 1-throw Contactor
SW180B-448L, a SW180L series of contactors, equipped with magnetic blowouts - B and larger contact tips (L) and has been designed for direct current loads, including motors as used on electric vehicles such as industrial trucks
About Continuous - CO.) SW181-4 Solenoids Continuous contactors by design are predominantly for drive functions on vehicles, they have weaker coils, switch slightly slower than intermittent solenoids and are recommended for prolonged contact periods. The SW181 has M8 stud main terminals and 6.3mm spade coil connections. It can be mounted via M5 tapped holes or mounting brackets purchased as separate items. Mounting can be horizontal or vertical, when vertical the M8 contact studs should point upwards. Please note Normally Closed contacts are not suited to make and break load.
Interrupted current - opening and closing on load with frequent switching - results in increased contact resistance).
Uninterrupted current - no or infrequent load switching requirements - maintains a lower contact resistance).
SW181A-48 ALBRIGHT 24V 150A CO DC - Contactor
The SW181A-48, a SW181 series of contactor with auxilary contacts (A) fitted, has been designed for direct current loads. This including motors on electric vehicles such as industrial trucks.
Magnetic Blowouts Fitted, option "B"
These contactors are fitted with magnetic blowouts - denoted by 'B' suffix in the SW181B range) across contact gaps. These enable high currents to be ruptured very quickly so that arcing time is reduced to a minimum. Fitting of blowouts can make the contacts polarity sensitive and the positive markings on the top cover of the contactor must be observed.
About Continuous - SW181AB-48 Solenoid
Continuous contactors by design are predominantly for drive functions on vehicles, they have weaker coils, switch slightly slower than intermittent solenoids and are recommended for prolonged contact periods.
The SW181 has M8 stud main terminals and 6.3mm spade coil connections. It can be mounted via M5 tapped holes or mounting brackets purchased as separate items. Mounting can be horizontal or vertical, when vertical the M8 contact studs should point upwards. Please note Normally Closed contacts are not suited to make and break load.
Difference between Interrupted and Uninterrupted
Interrupted current - opening and closing on load with frequent switching - results in increased contact resistance).
Uninterrupted current - no or infrequent load switching requirements - maintains a lower contact resistance).
Albright SW181B-141 24V DC CO - Continuous
CO-type (Continuous) can be run always on
Magnetic Blowouts
These contactors are fitted with magnetic blowouts - denoted by 'B' suffix in the SW181B range) across contact gaps. These enable high currents to be ruptured very quickly so that arcing time is reduced to a minimum. Fitting of blowouts can make the contacts polarity sensitive and the positive markings on the top cover of the contactor must be observed.
This SW181B-141 is also used in Haulotte machines under code 2440318890 - Contactor 24V Albright SW181B-141
Haulotte 2440318890 Contactor 24V, fits Haulotte HA15IP / HA43JE / HA12IP / HA33JE
About SW181B-141 Solenoids
Continuous contactors by design are predominantly for drive functions on vehicles, they have weaker coils, switch slightly slower than intermittent solenoids and are recommended for prolonged contact periods.
The SW181 has M8 stud main terminals and 6.3mm spade coil connections. It can be mounted via M5 tapped holes or mounting brackets purchased as separate items. Mounting can be horizontal or vertical, when vertical the M8 contact studs should point upwards. Please note Normally Closed contacts are not suited to make and break load.
Interrupted current - opening and closing on load with frequent switching - results in increased contact resistance).
Uninterrupted current - no or infrequent load switching requirements - maintains a lower contact resistance).
Magnetic Blowouts
These contactors are fitted with magnetic blowouts - denoted by 'B' suffix in the SW181B range) across contact gaps. These enable high currents to be ruptured very quickly so that arcing time is reduced to a minimum. Fitting of blowouts can make the contacts polarity sensitive and the positive markings on the top cover of the contactor must be observed.
About Intermittent - INT) SW181B-241TSolenoids
Intermittent contactors by design are predominantly used for hydraulic functions on vehicles, they make and break quicker than continuous solenoids and are not recommended for prolonged contact periods. The SW181 has M8 stud main terminals and 6.3mm spade coil connections. It can be mounted via M5 tapped holes or mounting brackets purchased as separate items. Mounting can be horizontal or vertical, when vertical the M8 contact studs should point upwards. Please note Normally Closed contacts are not suited to make and break load.
Interrupted current - opening and closing on load with frequent switching - results in increased contact resistance).
Uninterrupted current - no or infrequent load switching requirements - maintains a lower contact resistance).
About the Continuous SW182B-4 Reversing Contactors Continuous contactors by design are predominantly for drive functions on vehicles; they make and break slower than intermittent solenoids, and are recommended for prolonged contact periods. The SW182B is a configuration of two 'Single Pole, Double Throw' type contactors on a common bracket for motor reversing. The SW182B features single-pole double-breaking main contacts with silver alloy tips, which are weld resistant, hardwearing and have excellent conductivity. The SW182B main contact circuit, designed for motor reversing, is such that it has a built-in failsafe, so that if both coils are energized simultaneously the contact arrangement is open circuits. The SW182B has M8 stud main terminals and 6.3mm spade coil connections. Mounted using the supplied bracket, mounting of the solenoids can be horizontal or vertical, when vertical the M8 contact studs should point upwards.
Interrupted current - opening and closing on load with frequent switching - results in increased contact resistance).
Uninterrupted current - no or infrequent load switching requirements - maintains a lower contact resistance).
Magnetic Blowouts These contactors are fitted with magnetic blowouts - denoted by 'B' suffix in the SW182B range) across contact gaps. These enable high currents to be ruptured very quickly so that arcing time is reduced to a minimum. Fitting of blowouts can make the contacts polarity sensitive and the positive markings on the top cover of the contactor must be observed.
Intermittent contactors by design are predominantly used for hydraulic functions on vehicles, they make and break quicker than continuous solenoids and are not recommended for prolonged contact periods.The SW200 has been designed for direct current loads, including motors as used on electric vehicles such as industrial trucks. Developed for both interrupted and uninterrupted loads, the SW200 is suitable for switching Resistive, Capacitive, and Inductive loads. The SW200 features single pole single throw, double-breaking main contacts with silver alloy tips, which are weld resistant, hardwearing, and have excellent conductivity. The SW200 has M10 stud main terminals and 6.3mm spade coil connections. It can be mounted via M5 tapped holes or steel mounting brackets - supplied as separate items). Mounting can be horizontal or vertical, when vertical the M10 contact studs should point upwards.
ALBRIGHT 24V 250A INT DC ContactorThe SW200-281, a SW200 series of contactor is designed for direct current loads. SW200 have double breaking main contacts with silver alloy tips. Contact tips are weld resistant, extremely hard wearing. Normally Open contacts.
Genuine SW200-336 ALBRIGHT 24V 250A CO DC - COntactor. The SW200-336, a SW200 series of contactor is designed for direct current loads. SW200 have double breaking main contacts with silver alloy tips. Contact tips are weld resistant, extremely hard wearinga
Albright SW200A-11, 24 Volts DC 400 Amps single-acting contactor with magnetic blowouts and an auxiliary microswitch, continuous type coil is suitable for "main power" applications where on/off periods are long or always on.
Genuine SW200A-11 is Albright 24V 250A CO DC-type contactor. The SW200A-11 is a SW200 series of contactor is designed for direct current loads. SW200 have double breaking main contacts with silver alloy tips. Contact tips are weld resistant, extremely hard wearing.
This is equipped with Auxiliary contacts on the top.
Magnetic Blowouts These contactors are fitted with magnetic blowouts across the contact gaps as standard. These enable high currents to be ruptured very quickly so that arcing time is reduced to a minimum. Fitting of blowouts can make the contacts polarity sensitive and the positive markings on the top cover of the contactor must be observed.About Intermittent - INT) SW201-241 Solenoids Intermittent contactors by design are predominantly used for hydraulic functions on vehicles, they make and break quicker than continuous solenoids and are not recommended for prolonged contact periods. The SW201 has M10 stud main terminals and 6.3mm spade coil connections. It can be mounted via M5 tapped holes or mounting brackets purchased as separate items. Mounting can be horizontal or vertical, when vertical the M10 contact studs should point upwards. Please note Normally Closed contacts are not suited to make and break load.
Interrupted current - opening and closing on load with frequent switching - results in increased contact resistance).
Uninterrupted current - no or infrequent load switching requirements - maintains a lower contact resistance).
