| Parameter | Value |
|---|---|
| Model | HFE80V-20B |
| Contact Arrangement | 1 Form A (single pole, DC circuit) |
| Contact Rating | 20A |
| Contact Resistance | ≤ 5mΩ |
| Load Voltage | 450VDC (pictured type) · circuit rated up to 750VDC |
| Max. Switching Voltage | 750VDC |
| Max. Breaking Current | 30A (450VDC, 5 operations) |
| Max. Switching Power | 18kW |
| Electrical Endurance | Making 75,000 ops (450VDC, 20A) · Switching 3,000 ops (450VDC, 20A) |
| Mechanical Life | 200,000 operations |
| Operate / Release Time | ≤ 30ms / ≤ 10ms (at rated voltage) |
| Coil Voltage / Power | DC12V or DC24V · 3W (pick-up ≤ 75% Un) |
| Dielectric Strength | 3000VAC 1min (coil & contacts) · 2500VAC 1min (open contacts) |
| Insulation Resistance | ≥ 1000MΩ (1000VDC) |
| Ambient Temperature | -40°C ~ +85°C |
| Shock Resistance | Functional 196m/s2 · Destructive 490m/s2 |
| Terminal Structure | Load: #250 quick-connect tab (0.8t) · Coil: #187 tab (0.5t) |
| Dimensions | 40.0 × 30.0 × 31.6 mm (body) |
| Material | Ceramic · Copper · Silver |
| Certification | UL · CUL · VDE · TÜV · CQC |
 Outline dimensions - body 40.0 × 30.0 × 31.6 mm, #250 load tabs (0.8t) and #187 coil tabs (0.5t), 2×Ø4.5 mounting holes |
| Advantage | Benefit for Your Application |
|---|---|
| ✅ Compact 20A HV Switching | 20A continuous at up to 750VDC in a 40×30×31.6mm body - the smallest bracket-mounted member of the HFE80V family, ideal for compact PDUs and auxiliary HV circuits. |
| ✅ 30A Breaking / 18kW Power | Max. breaking 30A at 450VDC (5 operations) and 18kW max. switching power - a safe, certified way to switch main, precharge or fast-charge paths in 12~750V DC systems. |
| ✅ 3W Low-Power Coil | DC12V/24V coil at just 3W (pick-up ≤75% Un) - drives directly from BMS/VCU outputs without an economizer module, saving board space and wiring. |
| ✅ 200,000 Mechanical Ops | 200,000 mechanical operations with 75,000 making operations at 450VDC/20A - long service life for high-duty auxiliary and precharge switching. |
| ✅ Quick-Connect Termination | #250 (0.8t) load tabs and #187 (0.5t) coil tabs - solder-free QC wiring that speeds up assembly and service; bracket mounting with 2×Ø4.5 holes. |
| ✅ Automotive-Grade Certified | UL · CUL · VDE · TÜV · CQC certified; -40°C~+85°C and 490m/s2 destructive shock resistance for passenger EV, HEV and industrial HV cabinets. |
UL · CUL · VDE · TÜV · CQC - full certification documents and test reports available on request.
Typical roles in the HFE80V series application matrix: main / precharge / fast-charge / auxiliary relay - the -20B covers the compact end for passenger EV/HEV and industrial HV systems.
 Passenger EV & HEV Precharge relay · auxiliary HV circuits · small PDU switching in 12~750V systems |  Charging Equipment Charging piles · DC panels · control and indicator circuits in charging systems |
 Energy Storage System Battery cabinets · BMS auxiliary switching · HV DC distribution sub-circuits |  Industrial DC Equipment Power supplies · drives · test equipment HV DC switching up to 18kW |
| Item | Detail |
|---|---|
| Brand / Origin | HONGFA (Xiamen Hongfa Electroacoustic Co., Ltd.) · Xiamen, China |
| Ordering Model | HFE80V-20B/450-12-HTQ2BJ (as pictured: 450VDC, 12VDC coil, QC terminals, bracket mounting); outline drawing reference type: HFE80V-20B/450-XXX-HTQ2LJ |
| Configurable Options | Coil: 12VDC / 24VDC · special code (XXX) per project after HONGFA evaluation |
| Companion Models | HFE80V-20C (27kW) · HFE80V-20D (32kW) · HFE80V-40 (40A) · HFE80V-60 (60A) · HFE80V-200 (200A) - same platform from 20A to 200A |
| MOQ | Flexible - contact sales for sample & volume pricing |
| Lead Time | Typically 7-15 days (confirm with sales) |
| Payment | T/T, Trade Assurance, etc. (confirm with sales) |
| Warranty | 1 year |
Q1. Where is the HFE80V-20B typically used?
A: As a precharge, fast-charge or auxiliary relay in passenger EV/HEV high-voltage boxes, charging equipment, energy-storage battery cabinets and industrial DC equipment - anywhere a compact 20A / up to 750VDC switching point is needed.
Q2. How does the -20B differ from the -20C and -20D?
A: All three are 20A models on the same platform. The -20B adds a bracket with mounting holes and is rated 18kW; the -20C (27kW) and -20D (32kW) are unbracketed higher-power variants with different terminal layouts. Pick by your PDU layout and switching-power budget.
Q3. What can it break?
A: Max. breaking current is 30A at 450VDC (5 operations). Electrically it switches 3,000 ops at 450VDC/20A and makes 75,000 ops at 450VDC/20A, with 200,000 mechanical operations.
Q4. What coil options are available?
A: DC12V or DC24V, 3W, with pick-up voltage ≤75% of rated - low enough to driven directly from BMS/VCU logic outputs without an economizer.
Q5. How is it wired and mounted?
A: Load side #250 quick-connect tabs (0.8t), coil side #187 tabs (0.5t) - solder-free QC wiring. Mounting via the integrated bracket with 2×Ø4.5 holes (see the outline drawing in Technical Data).
Q6. Is it certified and vehicle-grade?
A: Yes - UL, CUL, VDE, TÜV and CQC certified. It operates from -40°C to +85°C and withstands 196m/s2 functional / 490m/s2 destructive shock, meeting automotive requirements.
