| Parameter | Value |
|---|---|
| Model | HV500F-121 |
| Brand | Albright · unit marked Made in China |
| Poles / Phase | 1 pole · single phase |
| Main Contact Arrangement | SPST-NO (normally open) |
| Auxiliary Contact Arrangement | SPST-NO / SPST-NC / SPST-NC Mirror |
| Rated Contact Voltage | DC 12V ~ 1000V |
| Continuous Operating Current | 250A (50mm2 or 1-1/0 AWG cables) |
| Continuous Operating Current (Max) | 500A (190mm2 or 350 MCM busbars) |
| Coil Voltage Range | DC 12V ~ 96V (PWM control · unit pictured: 24V PWM) |
| Voltage Drop | Typically < 30mV at 100A |
| Mechanical Durability | > 1,000,000 cycles |
| Auxiliary Durability | > 1,000,000 cycles |
| Insulation Resistance | > 200MΩ |
| Dielectric Withstand (at Sea Level) | 4000V DC · leakage < 1mA |
| Maximum Altitude | 3000 m |
| Environmental Seal | Main contacts, auxiliary contacts and PWM circuit hermetically sealed - exceeds IP67 |
| Weight | Approx. 400 g |
 Front view - nameplate HV500F-121 · 24V PWM, sealed contact housing with coil leads |  Terminal side - M8 main terminal studs with nuts and lock washers |
| Advantage | Benefit for Your Application |
|---|---|
| ✅ Up to 1000V DC Switching | Rated contact voltage 12~1000V DC covers high-voltage battery packs, EV powertrains and DC distribution circuits on a single contactor platform. |
| ✅ 250A Continuous / 500A Max | 250A continuous with 50mm2 (1-1/0 AWG) cable terminations, and up to 500A with 190mm2 (350 MCM) busbars - size the connection to the load. |
| ✅ Fully Sealed - Exceeds IP67 | Main contacts, auxiliary contacts and the PWM coil circuit are hermetically sealed - dust, water splash and condensation never reach the switching elements. |
| ✅ PWM Coil Drive, 12~96V Window | The built-in PWM economizer holds coil power down after pick-up and accepts a wide 12~96V DC coil supply (unit pictured: 24V PWM) - tolerant of saggy vehicle supplies. |
| ✅ Long Life, Low Loss | Mechanical and auxiliary durability both exceed 1,000,000 cycles, with typically <30mV drop at 100A and insulation resistance >200MΩ. |
| ✅ Flexible Feedback Options | Choose SPST-NO, SPST-NC or SPST-NC mirror auxiliary contacts for weld detection, interlocking and contactor status feedback in series strings. |
 HV500 series switching capacity (estimated life vs current, make & break / break-only regions) and load current vs time at +70°C terminal temperature rise |  HV500 series dimensions - approx. 81×68mm flange, 71.2mm height; M8 main terminals 8.0-9.5Nm, M5 mounting hardware 2.5-3.0Nm, terminal guard and bracket options |
Typical duty points for the HV500F-121 across high-voltage DC systems.
EV & Charging Systems Main and pre-charge switching in battery packs, powertrains and DC fast-charge circuits up to 1000V | Energy Storage & DC Distribution Battery cluster disconnect and DC bus switching where hermetic sealing and long life are critical | Industrial & Materials Handling Electric forklifts, AGVs, aerial platforms and industrial DC equipment exposed to dust and washdown |
| Item | Detail |
|---|---|
| Brand / Origin | Albright brand · unit nameplate marked Made in China |
| Ordering Model | HV500F-121 - 1-pole SPST-NO, DC12~1000V, 250A continuous (500A max), PWM coil (pictured: 24V PWM, window 12~96VDC) |
| Configurable Options | Auxiliary contact: SPST-NO / SPST-NC / SPST-NC mirror · coil voltage within 12~96V DC window · optional terminal protection device |
| Companion Models | Other Albright HV500 series variants available on request (sister model HV500AF-23 is referenced in the source page data) |
| MOQ | 5 pcs (per site inquiry form minimum - confirm with sales) |
| Lead Time | Typically 7-15 days (confirm with sales) |
| Payment | T/T, Trade Assurance, etc. (confirm with sales) |
| Warranty | 1 year |
Q1. What is the difference between the 250A and 500A ratings?
A: Both refer to continuous current - 250A with 50mm2 (1-1/0 AWG) cable terminations, or up to 500A when using 190mm2 (350 MCM) busbars. Size your terminations to the load and follow the torque values on the dimension drawing.
Q2. What coil voltage does the HV500F-121 use?
A: The coil accepts a 12~96V DC supply window under PWM control; the units pictured are marked 24V PWM. The built-in PWM economizer reduces holding power after pick-up, so a wide supply tolerance is acceptable.
Q3. What exactly does "full-sealed, exceeds IP67" cover?
A: The main contacts, auxiliary contacts and the PWM coil circuit are hermetically sealed from the environment - dust, water splash and condensation cannot reach the switching elements, making the contactor suitable for harsh vehicle and outdoor cabinet environments.
Q4. Are auxiliary contacts available?
A: Yes - SPST-NO, SPST-NC or SPST-NC mirror configurations, with durability also exceeding 1,000,000 cycles. They are typically used for weld detection, interlocking and contactor status feedback.
Q5. Can it switch under load at high voltage?
A: Yes within the make & break region of the HV500 switching capacity chart (up to roughly 700A depending on voltage and target life; larger currents are break-only). Estimated life curves assume resistive loads with ≤300μH inductance - share your switching profile with us for a life estimate.
Q6. What are the mounting and termination requirements?
A: Per the HV500 dimension drawing: M8 main terminals tightened to 8.0-9.5Nm, M5 mounting hardware to 2.5-3.0Nm (M6/M8 female terminals 3.0-4.5Nm / 8.0-9.5Nm, M10 male terminals 15.0-18.0Nm on relevant variants), Ø60mm base circle, approx. 400g overall weight.
