# NJBK7 Relay

## NJBK7 Relay for Advanced Motor Protection

The NJBK7 Relay provides essential protection for your electric motors, ensuring dependable operation and preventing costly downtime. Engineered with advanced sensing technology, it swiftly identifies and mitigates common motor faults like overloads and short circuits.

-   **1-10 Amp Adjustable Current Setting** ensures precise calibration for diverse motor loads, safeguarding against overcurrent conditions.
-   **Class 10 Tripping Performance** offers rapid response to faults, minimizing thermal stress on motor windings and extending equipment life.
-   **Wide Operating Temperature Range (-20°C to +60°C)** guarantees reliable function in demanding industrial environments, from cold storage to hot manufacturing floors.
-   **Integrated Thermal Overload Protection** actively monitors motor temperature, preventing damage from sustained high loads.
-   **Compact DIN Rail Mount Design** facilitates quick and space-efficient installation within control panels and electrical enclosures.

Compared to basic overloads or older relay technologies, the NJBK7 Relay offers superior accuracy and faster response times. This reduces the likelihood of nuisance tripping while significantly enhancing protection against severe faults that could otherwise lead to catastrophic motor failure. Its precise calibration capabilities mean you avoid oversizing protection, optimizing both safety and energy efficiency for your specific motor applications.

### Key Technical Advantages: Technology and Performance

**Advanced Sensing for Superior Fault Detection**: Leveraging Chint's expertise, the NJBK7 Relay employs state-of-the-art current and thermal sensing. This technology provides real-time monitoring, enabling it to distinguish between normal operating conditions and genuine threats like phase loss or ground faults, offering unparalleled protection and operational stability.

## Details

- **Price:** 50.61 USD - 109.71 USD
- **Vendor:** DDY GROUP CO.,LTD.
- **Tags:** Chint, Motor Protection

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| NJBK7-800/10/AC220V 2A～10A | 50.61 USD | In stock |
| NJBK7-800MT/40/AC220V 8A～40A | 84.36 USD | In stock |
| NJBK7-800MT/100/AC220V 20A～100A | 84.36 USD | In stock |
| NJBK7-800MT/400/AC220V 80A～400A | 109.71 USD | In stock |
| NJBK7-800M/100/AC220V 20A～100A | 67.48 USD | In stock |
| NJBK7-800M/400/AC220V 80A～400A | 83.87 USD | In stock |
| NJBK7-800MT/10/AC220V 2A～10A | 84.36 USD | In stock |
| NJBK7-800T/400/AC380V 80A～400A | 87.77 USD | In stock |
| NJBK7-800/800/AC380V 200A～800A | 76.06 USD | In stock |
| NJBK7-800M/100/AC380V 20A～100A | 67.48 USD | In stock |
| NJBK7-800MT/800/AC220V 200A～800A | 109.71 USD | In stock |
| NJBK7-800T/100/AC220V 20A～100A | 67.48 USD | In stock |
| NJBK7-800M/800/AC220V 200A～800A | 83.87 USD | In stock |
| NJBK7-800T/800/AC380V 200A～800A | 87.77 USD | In stock |
| NJBK7-800T/40/AC220V 8A～40A | 67.48 USD | In stock |
| NJBK7-800/10/AC380V 2A～10A | 50.61 USD | In stock |
| NJBK7-800/40/AC220V 8A～40A | 50.61 USD | In stock |
| NJBK7-800M/5/AC380V 1A～5A | 67.48 USD | In stock |
| NJBK7-800T/800/AC220V 200A～800A | 87.77 USD | In stock |
| NJBK7-800MT/40/AC380V 8A～40A | 84.36 USD | In stock |
| NJBK7-800MT/800/AC380V 200A～800A | 109.71 USD | In stock |
| NJBK7-800/5/AC220V 1A～5A | 50.61 USD | In stock |
| NJBK7-800T/10/AC220V 2A～10A | 67.48 USD | In stock |
| NJBK7-800MT/100/AC380V 20A～100A | 84.36 USD | In stock |
| NJBK7-800T/10/AC380V 2A～10A | 67.48 USD | In stock |
| NJBK7-800M/400/AC380V 80A～400A | 83.87 USD | In stock |
| NJBK7-800M/5/AC220V 1A～5A | 67.48 USD | In stock |
| NJBK7-800/800/AC220V 200A～800A | 76.06 USD | In stock |
| NJBK7-800/5/AC380V 1A～5A | 50.61 USD | In stock |
| NJBK7-800/400/AC220V 80A～400A | 76.06 USD | In stock |
| NJBK7-800/40/AC380V 8A～40A | 50.61 USD | In stock |
| NJBK7-800T/400/AC220V 80A～400A | 87.77 USD | In stock |
| NJBK7-800/100/AC380V 20A～100A | 50.61 USD | In stock |
| NJBK7-800T/40/AC380V 8A～40A | 67.48 USD | In stock |
| NJBK7-800/400/AC380V 80A～400A | 76.06 USD | In stock |
| NJBK7-800MT/5/AC220V 1A～5A | 84.36 USD | In stock |
| NJBK7-800MT/400/AC380V 80A～400A | 109.71 USD | In stock |
| NJBK7-800T/5/AC380V 1A～5A | 67.48 USD | In stock |
| NJBK7-800M/10/AC220V 2A～10A | 67.48 USD | In stock |
| NJBK7-800M/10/AC380V 2A～10A | 67.48 USD | In stock |
| NJBK7-800T/100/AC380V 20A～100A | 67.48 USD | In stock |
| NJBK7-800M/800/AC380V 200A～800A | 83.87 USD | In stock |
| NJBK7-800/100/AC220V 20A～100A | 50.61 USD | In stock |
| NJBK7-800MT/5/AC380V 1A～5A | 84.36 USD | In stock |
| NJBK7-800MT/10/AC380V 2A～10A | 84.36 USD | In stock |
| NJBK7-800M/40/AC380V 8A～40A | 67.48 USD | In stock |
| NJBK7-800T/5/AC220V 1A～5A | 67.48 USD | In stock |
| NJBK7-800M/40/AC220V 8A～40A | 67.48 USD | In stock |

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> Source: [DDY GROUP CO.,LTD.](https://ddysupply.com/products/njbk7-relay)
> Updated: 2026-08-29