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PRODUCT LINE / CUSTOM SOLUTIONS / TECHNICAL SUPPORT
OEM & Custom Solutions
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FOR OEMS / REF 16
WDK-3 / WDK-4 Emergency Disconnect Switch
Review the electrical ratings, connection options and installation details for this switch configuration.
- Application-based electrical specification review
- Electrical and mechanical compatibility
- Technical discussion for OEM requirements
- Sample evaluation and bulk sourcing coordination
Industrial Switch Specifications
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WDK-3 / WDK-4 Emergency Disconnect Switch
- Series
- WDK-3 / WDK-4
- Rated main contact voltage
- 12–96 V DC
- Rated main contact current
- 250 A (WDK-3) / 400 A (WDK-4)
- Protection rating
- IP40
Features
- With a group of bridge type dynamic closing main normally open contact or a group of main
- normally open contact、a group of auxiliary contact.
- The main contact load current can reach 400A, the auxiliary contact load current 16A.
- The main contact and auxiliary contact simultaneously connected and disconnected.
- Adopting modular design, high-voltage products are equipped with arc extinguishing device, contact breaking voltage can reach 96VMAX.
- Fully in line with ROHS requirements.
| Connection type | Bolt connector | Mounting method | Panel screw mounting |
|---|---|---|---|
| Stationary contacts | Silver-copper alloy | Moving contacts | Silver-copper alloy |
| Base material | Phenol-wakeplastic | Handle material | ABS engineering plastic |
| Electrical life | 10,000time | Operating temperature | -40℃~+85℃ |
| Mechanical life | 100,000time | Operating humidity | 5%～90% |
| Protection rating | IP40 |
| Product Parameter | Units | WDK-3 | WDK-4 | ||
|---|---|---|---|---|---|
| Rated main contact voltage | VDC | 12～96 | 12～96 | ||
| Rated main contact current | A | 250 | 400 | ||
| Continuous operating current of main contact | A | 175 | 280 | ||
| contact drop | mV | ≤80 | ≤120 | ||
| Maximum breaking capacity of main contact | A | 1000A(power on time does not exceed 1s, allow 1 time on/off) | 1200A(power on time does not exceed 1s, allow 1 time on/off) | ||
| The Auxiliary contact is rated at the same voltage | VDC | 12~36 | 12~36 | ||
| Auxiliary contact rating | A | 16 | 16 | ||
| Pull force of the handle upwards | N | 35~60 | 35~60 | ||
| Pressure for pressing down on the handle | N | 15~50 | 15~50 | ||
| Electrical life of main contact | cycles | 24V DC 250A | ＞10000 | 24V DC 400A | ＞10000 |
| cycles | 48V DC 250A | ＞5000 | 48V DC 250A | ＞5000 | |
| cycles | 80V DC 250A | ≯100 | 80V DC 250A | ≯100 | |
| Mechanical life | cycles | ＞100,000 | ＞100,000 | ||
| Voltage resistance | VAC | 1000VAC 50 Hz/60 Hz ,1 minute(leakage current does not exceed 5mA) | 1000VAC 50 Hz/60 Hz ,1 minute(leakage current does not exceed 5mA) | ||
| Insulation resistance | MΩ | ＞100 (under 500VDC conditions) | ＞100 (under 500VDC conditions) | ||
| Operating temperature | ℃ | -40～+85 | -40～+85 | ||
| Operating humidity | / | 5%～90% | 5%～90% | ||
| Impact | m/s2 | 30 | 30 | ||
| Vibration ，10 ～ 55Hz | mm | Amplitude 0.35 | Amplitude 0.35 | ||
| Rated duty system | / | Non-stop work system | Non-stop work system | ||
| Weight (approx) | g | 428 | 483 | ||
| Degree of Protection | / | IP40 | IP40 | ||
Please refer to the technical datasheet for the exact ratings and operating conditions of each model.
TECHNICAL DRAWINGS
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Designed Around Your
Equipment Requirements
Electrical and Mechanical Compatibility
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OEM and Customization Support
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Industrial Switch
Applications
- Vehicle electrical systems
- OEM equipment assemblies
- Application-specific control circuits
Check the model drawings and terminal configuration against your equipment before integrating the switch.
OEM Industrial Switch
Sourcing
For equipment manufacturers, consistent specifications and reliable supply arrangements are important throughout the product lifecycle.
When evaluating a supplier, consider technical documentation, sample verification, production consistency, customization feasibility and long-term sourcing requirements.
FAQ
Frequently
Asked
Questions
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Request a quoteWhat should I check before selecting this switch?
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Can I request a customized contactor?
Customization depends on the model and technical requirements. Share your specifications or drawings so the feasibility of your requested configuration can be reviewed.
Can I request samples before bulk purchasing?
Sample availability, cost and lead time should be confirmed for the selected model before placing an order.
What information is needed for a quotation?
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