A 100A Automotive High Current Relay is an electromagnetic switch that uses a small current (such as a 12/24V control signal) to control the on/off of a vehicle's maximum current of 100A. Its core function is to control high current with low current, protect the control circuit, and achieve reliable switching of high-power loads.
High Current Capacity: 100A switching capability for heavy-duty applications
Contact Options: 1 Form A / 1 Form B / 1 Form C
Temperature Range: -40°C to 125°C for harsh environments
Installation Types: Plug-in, PCB terminal, PC pin, quick connect
Arc Control: Built-in blowout magnets for stable switching
Protection Types: Dustproof and plastic sealed versions
Durability: Flux-proof design for longer service life
Electrical Specifications
Coil Voltage: 12VDC / 24VDC
Coil Power Consumption: 1.6W / 1.8W / 2.0W (low power design)
24V Version: Contact gap > 0.8mm for improved insulation and safety
Optional Configurations
Diode or resistor suppression available
Metal mounting bracket optional for enhanced installation stability
The 100A Automotive High Current Relay KLDH (V7) is a cost-effective and reliable solution for automotive power distribution, motor control, and heavy-load switching applications, offering stable performance and flexible configuration for global procurement needs.
| Contact arrangment | A/B/C |
| Voltage drop (at 10A) | ≤200mV |
| Contact material | Silver alloy:AgSnO₂ In₂O₃、AgSnO₂、AgNi |
| Contact rating | 30A/40A/60A 14VDC |
| Max switching voltage | See“Load limit curve” |
| Max switching current | 80A(Resistive 14VDC) |
| Min contact load | 1A 6VDC |
| Electrical endurance(Frequency:900 ops/h) | 1×10⁵ops |
| Mechanical endurance(Frequency:18000 ops/h) | 1×10⁷ops |
| Power consumption(W) | 1.6W | 1.8W | 1.6W | 1.8W | 1.8W | 2.0W |
| Nominal voltage(VDC) | 12 | 12 | 24 | 24 | 24 | 24 |
| Coil resistance(Ω±10%) | 90 | 90 | 360 | 360 | 320 | 320 |
| Parallel resistance(Ω) |
|
680 |
|
2700 |
|
2700 |
| Pick-up voltage(Max) | 65%(Nominal voltage) | |||||
| Drop-out voltage(Min) | 10%(Nominal voltage) | |||||
| Max allowable overdrive voltage(VDC) | 150%(Nominal voltage) | |||||
| Insulation level | Class B/Class F | |
| Insulation resistance | 100MΩ(500VDC) | |
| Dielectric strength(Leakage current 1mA) | Dielectric strength(Between coil and contacts) | 500VAC minute |
| Dielectric strength(Between open contacts) | 500VAC minute | |
| Operate time(at nominal voltage) | ≤10ms | |
| Release time(without diode)(at nominal voltage) | ≤10ms | |
| Humidity | 5%～85%RH | |
| Ambient temperature | -40℃~+125℃ | |
| Vibration resistance | 10Hz~55Hz 3.0mm Double amplitude | |
| 55Hz~500Hz 100m/s² | ||
| Shock resistance | 294m/s² | |
| Weight | Approx 40g | |
| Construction | Dustproof Sealed type | |
The 100A Automotive High Current Relay KLDH (V7) is widely used in:
●Automotive power distribution systems
●Motor control units
●Battery management systems
●HVAC systems
●Heavy-duty industrial equipment
●High-load switching circuits
1. Current Handling Capability
100A Automotive High Current Relay: Designed for heavy-duty switching up to 100A, suitable for high-load automotive and industrial circuits.
Standard Relay: Typically handles lower currents (e.g., 5A–40A), used for signal control or light loads.
2. Application Scope
100A High Current Relay: Used in power distribution, motor control, battery systems, HVAC, and heavy industrial equipment.
Standard Relay: Mainly used in low-power control circuits, small appliances, or signal switching.
3. Structural Design
100A Relay: Reinforced internal structure with arc suppression (blowout magnet design) for stable high-current switching.
Standard Relay: Simpler internal design without advanced arc control systems.
4. Contact Design Options
100A Relay: Supports 1 Form A / B / C contact configurations for flexible high-power circuit design.
Standard Relay: Usually limited contact forms and lower load adaptability.
5. Protection & Durability
100A Relay: Available in dustproof, sealed, and flux-proof designs, built for harsh environments (-40°C to 125°C).
Standard Relay: Basic protection, less resistant to vibration, heat, and contamination.
6. Installation Flexibility
100A Relay: Supports plug-in, PCB, PC pin, and quick-connect mounting for industrial integration.
Standard Relay: Fewer mounting options, mainly PCB or plug-in.
7. Electrical Efficiency
100A Relay: Low coil power consumption (1.6W–2.0W), optimized for energy-efficient systems.
Standard Relay: May not prioritize low-power coil design.
With over years of manufacturing expertise, KEYONG delivers reliable relay solutions built for long-term industrial performance. This 100A automotive relay combines high load capacity, stable contact performance, and excellent environmental resistance, making it a trusted choice for OEMs and global automotive suppliers.
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350 Renmin North Road, Hengxi Town, Yinzhou District, Ningbo City, Zhejiang Province, China
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