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- ABB
- NEXA-21
- Communication Module
- Sweden
- 90 x 35 x 75 mm
- 0.23kg
- 3AUA0000093781
- Xiamen, China
- New & In Stock
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Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
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All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview: ABB NEXA-21 / 3AUA0000093781
Brand
Series
NEXA Series (Electronic Control and Protective Relays)
Product Description
The ABB NEXA-21 is a state-of-the-art electronic relay designed for industrial and commercial control systems. It combines protection, monitoring, and automation functions in a compact and reliable package.
This model provides precise control of electrical circuits, detecting abnormal conditions such as overload, short-circuit, and voltage deviations. Its advanced electronic circuitry allows rapid fault detection and fast response to critical events, ensuring operational safety.
The NEXA-21 is suitable for integration in low- and medium-voltage distribution boards, automation panels, and motor control centers. Its compact size and modular design facilitate easy installation, while the clear interface provides visual indication of operational status.
Applications
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Industrial automation systems requiring electronic monitoring and protection.
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Commercial low-voltage distribution boards and control panels.
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Motor and pump control systems needing rapid fault detection and shutdown.
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Circuits requiring voltage, current, and fault monitoring in real time.
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Integration into automation and energy management systems for operational safety and reliability.
Product Advantages
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Precise Electronic Control – Accurate monitoring of voltage, current, and system status.
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Rapid Fault Detection – Response time under 20 milliseconds for overload and short-circuit conditions.
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Compact Design – Space-efficient installation in panels and control boards.
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Dual Functionality – Combines monitoring and protection in a single device.
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User-Friendly Interface – Visual status indicators for operational clarity.
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Flexible Integration – Supports multiple input/output configurations for automation systems.
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High Reliability – Durable design suitable for industrial environments.
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International Standards Compliance – Meets IEC 60947 and IEC 60255 for control and protection relays.
Technical Parameters
| Parameter | Specification |
|---|---|
| Model | ABB NEXA-21 |
| Part Number | 3AUA0000093781 |
| Rated Operational Voltage | 230/400 V AC |
| Rated Current | 5–21 A adjustable |
| Tripping Function | Electronic monitoring and protection |
| Number of Poles | 1 |
| Response Time | < 20 ms |
| Mounting Type | DIN rail / Panel mount |
| Operating Temperature | -20°C to +60°C |
| Degree of Protection | IP20 |
| Dimensions (HxWxD) | 90 x 35 x 75 mm |
| Weight | 0.23 kg |
| Standards Compliance | IEC 60947 / IEC 60255 |
Recommended Related Models in NEXA Series
| Model | Rated Current (A) | Poles | Function | Weight (kg) | Dimensions (HxWxD mm) |
|---|---|---|---|---|---|
| NEXA-11 | 1–10 | 1 | Protective relay | 0.20 | 85 x 35 x 70 |
| NEXA-15 | 5–15 | 1 | Electronic monitoring | 0.21 | 90 x 35 x 75 |
| NEXA-21C | 5–21 | 1 | Control + protection | 0.23 | 90 x 35 x 75 |
| NEXA-30 | 10–30 | 1 | Protective relay | 0.25 | 95 x 40 x 80 |
| NEXA-40 | 20–40 | 1 | Monitoring + control | 0.27 | 100 x 45 x 85 |
Recommended Popular ABB Models
| Model | Rated Current (A) | Poles | Function | Weight (kg) | Dimensions (HxWxD mm) |
|---|---|---|---|---|---|
| Emax 2 1600 | 1600 | 3 | Circuit breaker | 58 | 440 x 220 x 200 |
| Tmax XT1 630 | 630 | 3 | Circuit breaker | 25 | 350 x 200 x 180 |
| S203 C16 | 16 | 3 | Miniature breaker | 0.25 | 85 x 52.5 x 70 |
| NDCU-12C | 12 | 1 | Miniature circuit breaker | 0.13 | 80 x 17.5 x 70 |
| NBRC-61C | 61 | 1 | Thermal-magnetic protection | 0.35 | 90 x 18 x 75 |
FAQ (10 Questions)
Q1: What is the main function of ABB NEXA-21?
A1: Electronic monitoring, control, and protection of low- and medium-voltage circuits.
Q2: What is the adjustable current range?
A2: 5–21 A.
Q3: How is it mounted?
A3: Supports DIN rail and panel mounting.
Q4: Does it provide rapid fault detection?
A4: Yes, response time is under 20 milliseconds.
Q5: Can it be used in industrial environments?
A5: Yes, designed for commercial and light to medium industrial applications.
Q6: What is the operating temperature range?
A6: -20°C to +60°C.
Q7: Does it have visual indicators?
A7: Yes, it has clear operational status display.
Q8: What standards does it comply with?
A8: IEC 60947 and IEC 60255.
Q9: Can it be integrated into automation systems?
A9: Yes, it supports multiple I/O configurations for control and monitoring.
Q10: What type of circuits is it suitable for?
A10: Low- and medium-voltage circuits requiring protection, monitoring, and electronic control.