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- 70 × 45 × 110 mm
- 0.32kg
- 3BSE008534R1
- Xiamen, China
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ABB TB805 (3BSE008534R1) Product Overview
Product Introduction
The ABB TB805 is a thermal overload relay designed for protecting three-phase motors and industrial equipment against overcurrent conditions. It is an electromechanical device that monitors motor current and trips to disconnect the motor when it exceeds a preset threshold, preventing overheating and potential damage.
The TB805 features a robust design suitable for industrial environments, ensuring long-term reliability and safe motor operation. Its adjustable current settings allow precise protection across a wide range of motor ratings. The relay is compatible with standard contactors and can be easily mounted in control panels.
It is commonly used in automation, manufacturing, and energy distribution systems where motor protection is critical.
Product Parameters
| Parameter | Specification |
|---|---|
| Model | ABB TB805 (3BSE008534R1) |
| Product Type | Thermal Overload Relay |
| Rated Operational Current | 0.16–0.25 A |
| Adjustable Current Range | 0.16–0.25 A |
| Tripping Class | 10A |
| Rated Voltage | 690 V AC |
| Frequency | 50–60 Hz |
| Number of Poles | 3 |
| Mounting | Direct on contactor or panel mount |
| Reset Type | Manual / Automatic |
| Dimensions (L × W × H) | 70 × 45 × 110 mm |
| Weight | 0.32 kg |
| Operating Temperature | –20 °C to +60 °C |
| Protection Features | Overcurrent, phase failure, and thermal protection |
| Standards Compliance | IEC 60947-4-1, IEC 60947-5-1 |
Product Applications
The TB805 thermal overload relay is widely used for:
• Protecting three-phase motors in industrial automation systems.
• Machinery and conveyor systems in manufacturing plants.
• Pump, fan, and HVAC motor protection.
• Control cabinets where safe disconnection of motors is required during overload.
• Energy distribution systems with motor loads.
• Backup motor protection in water treatment or processing plants.
• Integration with contactors in starter assemblies to ensure reliable operation.
Product Advantages
• Motor Protection: Prevents overheating and damage due to overcurrent or phase failure.
• Adjustable Current Range: Allows precise matching to motor ratings for different applications.
• Compact Design: Saves space in control panels and fits standard motor starters.
• Reliable Operation: Electromechanical design ensures predictable tripping behavior.
• Dual Reset Option: Manual or automatic reset depending on operational needs.
• Industrial Grade: Robust construction withstands vibration, temperature variation, and harsh environments.
• Standards Compliant: Meets IEC 60947 for safety and interoperability.
• Easy Installation: Compatible with standard contactors for quick assembly.
Brand and Series Information
• Brand: ABB
• Series: TB Series — Thermal Overload Relays for three-phase motor protection.
Recommended Related Models (Same Series or Function)
| Model | Rated Operational Current | Tripping Class | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|
| TB801 | 0.1–0.16 A | 10A | 65 × 40 × 100 | 0.28 |
| TB802 | 0.16–0.25 A | 10A | 70 × 45 × 110 | 0.30 |
| TB803 | 0.25–0.4 A | 10A | 70 × 45 × 110 | 0.32 |
| TB804 | 0.4–0.63 A | 10A | 75 × 50 × 115 | 0.35 |
| TB806 | 0.63–1 A | 10A | 80 × 50 × 120 | 0.38 |
Recommended Popular Models (Same Brand)
| Model | Type | Rated Current | Tripping Class | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| D16 | Solid-State Relay | 24–240 V | 16 A | 85 × 30 × 55 | 0.23 |
| D25 | Solid-State Relay | 24–240 V | 25 A | 90 × 35 × 60 | 0.30 |
| D40 | Solid-State Relay | 24–600 V | 40 A | 120 × 50 × 80 | 0.52 |
| T7 | Control Relay | 24–240 V | 7 A | 70 × 25 × 45 | 0.18 |
| T9 | Control Relay | 24–600 V | 9 A | 80 × 30 × 50 | 0.20 |
FAQ – ABB TB805
Q1: What is the operational current range of TB805?
A1: 0.16–0.25 A.
Q2: What tripping class does it use?
A2: Class 10A.
Q3: Can it reset automatically?
A3: Yes, it supports both manual and automatic reset.
Q4: What voltage can it handle?
A4: Up to 690 V AC.
Q5: How many poles does it have?
A5: Three poles for three-phase motors.
Q6: Can it be mounted directly on a contactor?
A6: Yes, it is designed for direct mounting on compatible contactors.
Q7: What is the weight and size of the TB805?
A7: 70 × 45 × 110 mm, weight 0.32 kg.
Q8: What protection does it provide?
A8: Overcurrent, phase failure, and thermal protection.
Q9: Is it suitable for industrial environments?
A9: Yes, it is robust and suitable for industrial conditions.
Q10: Which standards does it comply with?
A10: IEC 60947-4-1 and IEC 60947-5-1.