Product description
Product Description
The ZLJ-200A/27 DC contactor is designed for switching and controlling DC power circuits. It is widely used in battery-powered vehicles, electric forklifts, electric winches, electric vehicles, excavators, automotive air-conditioning systems, communication power supplies and other DC electrical systems.
Key Features
- 200 A contact-switching capacity.
- One normally open contact: SPST-NO.
- Approximately 6 W holding-coil power consumption.
- Silver-alloy contacts for reliable current switching.
- Suitable for continuous-duty operation.
- Compliant with RoHS requirements.
- Designed for telecommunications equipment, construction machinery, electric vehicles, forklifts, trains, ships and UPS systems.
Technical Specifications
| Item | Specification |
|---|---|
| Model | ZLJ-200A/27 |
| Product Type | DC Contactor |
| Contact Configuration | 1H, SPST-NO |
| Contact Material | Silver alloy |
| Rated Contact Load | 200 A × 48 VDC, resistive load, DC-1 |
| Rated Coil Voltage | 27 VDC |
| Coil Operating Voltage | 85%–110% of rated coil voltage |
| Pick-Up Voltage | 45%–70% of rated coil voltage |
| Drop-Out Voltage | 5%–40% of rated coil voltage |
| Starting Current at 27 VDC and 20°C | ≤4.5 A |
| Holding Current at 27 VDC and 20°C | ≤0.2 A |
| Contact Voltage Drop | ≤80 mV at 200 A |
| Insulation Resistance | ≥100 MΩ at 500 VDC |
| Dielectric Strength | 1,000 VAC, 50/60 Hz for 1 minute |
| Leakage Current During Dielectric Test | <1 mA |
| Pick-Up Time | ≤30 ms |
| Release Time | ≤30 ms |
| Operating Temperature | -25°C to +60°C |
| Storage Temperature | -40°C to +65°C |
| Relative Humidity | 20%–90% RH |
| Vibration Resistance | 10–200 Hz, acceleration ≤3.5 g |
| Shock Resistance | 60–100 impacts/min, acceleration ≤4 g |
| Mechanical Life | 100,000 operations without load |
| Electrical Life | 6,000 operations at rated load |
| Pollution Degree | III |
| Duty Cycle | Continuous duty |
Model Number Identification
ZLJ-200A/27
- ZLJ: Design code for a normally open DC contactor.
- 200A: Rated current of 200 A under a DC-1 resistive load.
- 27: Rated coil voltage of 27 VDC.
Example: ZLJ-200A/27 indicates a normally open DC contactor rated for a 200 A × 48 VDC resistive load, with a 27 VDC coil.
Typical Applications
- Battery-powered vehicles
- Electric forklifts and winches
- Electric and hybrid vehicles
- Excavators and construction machinery
- Automotive air-conditioning systems
- Telecommunication power supplies
- Uninterruptible power supplies
- Railway and marine electrical systems
Installation and Safety Precautions
- Tighten the main-circuit terminal screws and nuts to a torque of 8–10 N·m. Tighten the control-circuit terminal screws and nuts to 1–1.5 N·m.
- The coil-driving circuit must provide power equal to or greater than the required coil power. Insufficient driving power may reduce the contactor’s breaking performance.
- Do not continuously apply a coil voltage exceeding the maximum allowable value. Excessive voltage can cause abnormal coil heating and shorten insulation life.
- This contactor is not waterproof. Do not use it where water, solvents or oil may contact the housing or terminals. Such exposure may cause housing deterioration, terminal corrosion, contamination or abnormal heating.
Drawing Note
The model-identification graphics, outline dimensions, mounting dimensions and circuit diagram use local computer image paths and were not included in the supplied content. The original images must be uploaded separately for extraction.
