Automotive solid state relay
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Automotive solid state relay
| Model | QDZS |
|---|---|
| Control Voltage | 12～15 VDC or 18～36 VDC |
| Control Current | 30～80 mA or 25～70 mA |
| Undervoltage Protection | <10VDC lock for 12-15V or <16VDC lock for 18-36V |
| Working Indication | LED indicator |
| Load Voltage | 5-60V, 6-120V, 10-360V, 20-720V |
| Maximum Current | 10, 30, 60, 80, 100, 120, 150, 180, 200, 300, 400, 500, 600, 800, 1000, 1200, 1500, 2000A |
| On-state Voltage Drop | ≤0.5～4.2 VDC |
| Off-state Voltage | 100V, 200V, 400V, 600V, 1200V |
| Surge Voltage Protection | 80V, 180V, 360V, 480V, 1000V |
| Overcurrent Protection | None, L: 50% output current, Z: 100% output current |
| Switching Time | ≤0.2mS (10A-200A); ≤0.3mS (150A-300A); ≤0.5mS (400A-2000A) |
| Switching Characteristics | MOS or IGBT transistor, solid-state no contact on/off |
| Isolation Voltage | ≥1800～2500 V |
| Insulation Voltage | ≥2000～2500 V |
| Operating Temperature | -30～80°C |
| Heat Dissipation | ≥20A with heat sink, ≥60A with fan cooling |
| Load Current Safety Factor | 2.5-4 times for resistive load, 3-6 times for inductive load |
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| 10A to 200A | 150A to 400A | 500A to 2000A |
| Model | QDZH |
|---|---|
| Control Power Supply | 12～15 VDC/2W or 18～36 VDC/2W |
| Control Signal | 4-32VDC @ 10-25mA |
| Undervoltage Protection | <10VDC lock for 12-15V or <16VDC lock for 18-36V |
| Working Indication | LED indicator |
| Load Voltage | 5-60V, 6-120V, 10-360V, 20-720V |
| Maximum Current | 150, 180, 200, 300, 400, 500, 600, 800, 1000, 1200, 1500, 2000A |
| On-state Voltage Drop | 1.0～4.2 VDC |
| Off-state Voltage | 100V, 200V, 400V, 600V, 1200V |
| Surge Voltage Protection | 80V, 180V, 360V, 480V, 1000V |
| Overcurrent Protection | None, L: 50% output current, Z: 100% output current |
| Switching Time | ≤0.15mS (150A-300A); ≤0.2mS (400A-2000A) |
| Switching Characteristics | MOS or IGBT transistor, solid-state no contact on/off |
| Isolation Voltage | ≥1800～2500 V |
| Insulation Voltage | ≥2000～2500 V |
| Operating Temperature | -30～80°C |
| Heat Dissipation | ≥20A with heat sink, ≥60A with fan cooling |
| Load Current Safety Factor | 2.5-4 times for resistive load, 3-6 times for inductive load |
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| 150A to 300A | 400A to 2000A |
The data provided in the parameter table is measured at room temperature (25°C). Actual working conditions should have some margin. For resistive loads: select current rating 2.5-4 times the load current, and voltage rating 2-2.5 times the load voltage supply. For inductive loads: select current rating 3-7 times the load current, and voltage rating 2.5-3 times the load voltage.
According to the relationship between load current and ambient temperature, increase the current capacity of the solid-state relay accordingly when the ambient temperature is high or the heat dissipation conditions are poor.
To prevent product failure due to load short-circuit during use, a fast-acting circuit breaker or fast-blow fuse corresponding to this product should be connected in series with the load circuit. Alternatively, the self-protected QDZ-L (overcurrent) or QDZ-Z (short-circuit) upgraded products can be selected.
For inductive loads, a freewheeling diode must be connected in parallel across the load, and a metal oxide varistor (MOV) rated at 1-1.5 times the supply voltage must be connected in parallel at the output to prevent high voltage spikes from damaging the solid-state switch during switching.
During installation, the heat sink contact surface with the product must be flat and clean, and a layer of thermal silicone grease should be applied. Finally, tighten the screws symmetrically with flat washers and spring washers to secure the assembly.
- Opto-isolated between control signal and output circuit.
- Control signal interfaces with PLC, TTL logic.
- LED indicates working status.
- Output switch is solid-state normally open, no contact. No sparks or arcing during switching.
- L.Z series has built-in undervoltage, overvoltage, overcurrent, and short-circuit protection functions.
- High-temperature resistant, flame-retardant, integrated packaging, corrosion-resistant, shock-resistant, stable and reliable switching.
- The product is mainly used for medium and small power DC electrical appliances in new energy vehicles, such as PTC heaters, battery/capacitor charging and discharging, solenoid valves, motor switching, etc.
