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FOR OEMS / REF 18
THH2-300 / THH2-450 Battery 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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THH2-300 / THH2-450 Battery Disconnect Switch
- Rated current options
- 300 / 450 A
- Protection rating
- IP67
- Rotation angle
- 90°
- Nut mounting
- IP67 protection grade, waterproof and dustproof；
- The 90° angle of rotation ensures reliable contact and disconnection and easy identification of the switching position.
- With maintenance lock protection function
- Fully comply with ROHS requirements.
- It can be used in all vehicle electrical systems, such as heavy trucks, off-road vehicles, engineering vehicles, emergency vehicles, material handling vehicles, garbage collection vehicles, mining vehicles, agricultural vehicles or yachts.
| Connection type | Bolt terminal | Mounting method | Panel nut installation |
|---|---|---|---|
| Stationary contacts | Copper or copper alloys | Moving contact | Copper or copper alloys |
| Top cover material | Fiber reinforced nylon | Base material | Fiber reinforced nylon |
| Electrical life | 30000 times | Operating temperature | -40℃to+85℃ |
| Mechanical life | 100000 times | Working humidity | 5%～90% |
| Class of protection | IP67 | Handle operating torque | 1N·m～3N·m |
| Product Parameter | Units | THH2-300 | THH2-450 |
|---|---|---|---|
| Operating voltage | VDC | 6V min，48V max | 6V min，48V max |
| contact resistance | mΩ | 0.5 max | 0.5 max |
| contact current rating | A | 300A (External output cable cable≮120mm2） | 450A (External output cable cable≮150mm2） |
| Contact intermittent current | A | 1000A(90s on,5min off)， 3000A(1s on, 1times) | 1000A(90s on,5min off)， 3000A(1s on, 1times) |
| Electrical life | time | 30,000 | 30,000 |
| Mechanical life | time | 100,000 | 100,000 |
| withstand voltage | VAC | 1000VAC 50 Hz/60 Hz ,1minutes The leakage current does not exceed 5mA | 1000VAC 50 Hz/60 Hz ,1minutes The leakage current does not exceed 5mA |
| Insulation resistance | MΩ | 100 Above 100 (under 500VDC) | 100 Above 100 (under 500VDC) |
| Operating temperature | ℃ | -40～+85 | -40～+85 |
| Working humidity | / | 5%～90% | 5%～90% |
| Impact | m/s2 | 500 | 500 |
| 8～200Hz Vibration8- 200Hz 10～500Hz | mm | Amplitude7.5mm,Acceleration amplitgde20 m/s2 | Amplitude7.5mm,Acceleration amplitgde20 m/s2 |
| Protection rating | / | IP67 | IP67 |
| Terminal specifications | / | 3/8”-24(M10 | 1/2”-20(M12) |
| Weight | g | 442 | 482 |
Principle of operation
- When the handle is rotated 90° clockwise, the drive shaft pushes the contact plate to connect with the contact, so that the current of the two terminals is closed.
- When the handle is rotated 90°counter clockwise, the drive shaft pushes the contact plate to connect with the contact, so that the current of the two terminals is closed.
Circuit connection specifications
- The positive power terminal is connected: The disconnect position is between the power supply and the load, and all load sources are cut off when the switch is off.
- Negative power connection: The disconnect position is between the power supply and the ground, and the short-circuit current may be generated between the load and the ground when the switch is disconnected.
- External drawing
Precautions for use
- ※ The torque range of tightening screws is specified below, exceeding the maximum torque may cause the product to break.
- 1)Contact terminal force distance: (3/8 or M10 bolt)8-10N.m (1/2 or M12 bolt)10-12 N.m
- 2) Torque at installation (3/4 bolt) : 24N.m (max)
- ※ Do not allow debris and oil to get on the main lead, and the external terminal should be in reliable contact with the main lead of the product, otherwise it may cause the lead to heat up a lot. Also, the lead cables connected to the product must have the required cross-sectional area to prevent overheating, which may affect the service life of the product.
- ※ The switch has a group of bridge type dynamic closing normally open contacts, and the contact load current reaches 300A (450A). Under normal conditions, the switch is turned on without load and turned off without load. When the circuit is abnormal and fails, turn off the switch quickly to cut off the circuit and protect the system circuit from damage.
Please refer to the technical datasheet for the exact ratings and operating conditions of each model.
TECHNICAL DRAWINGS
Drawings & diagrams
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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
Discuss your requirements
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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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