193-T1AB40

Overview of Allen Bradley 193-T1AB40

The Allen Bradley 193-T1AB40 is a bimetallic thermal overload relay engineered to protect motors and electrical circuits from damaging overcurrent conditions. This T1-series device features a current range of 2.9 to 4.0 amperes with adjustable trip settings, providing precise motor protection for low-amperage applications. The relay incorporates ambient temperature compensation to maintain consistent performance across temperature variations from -20°C to +60°C. Built to IEC and UL standards with Trip Class 10 characteristics, the 193-T1AB40 delivers differential release technology for phase loss sensitivity, preventing motor damage in single-phasing conditions. The unit offers both manual and automatic reset options, giving operators flexibility in fault recovery procedures. Designed for direct mounting to Bulletin 100-C contactors and 104-C reversing contactors, this overload relay integrates cleanly into motor control systems. The device carries CE and cULus certifications and operates at voltages up to 690V AC (IEC) or 600V AC (UL), making it suitable for international installations.

Key Features of Allen Bradley 193-T1AB40

• Adjustable current range: 2.9-4.0A for precise motor protection
• Ambient temperature compensation (-20°C to +60°C operating range)
• Trip Class 10 for coordinated circuit protection
• Differential release technology for phase loss detection
• Manual and automatic reset capability
• Direct mounting compatibility with 100-C and 104-C contactors
• Rated operating voltage: 690V AC (IEC) / 600V AC (UL)
• IP2X degree of protection with wires connected

Technical Specs of 193-T1AB40

• Current Range: 2.9-4.0A
• Rated Isolation Voltage: 690V
• Rated Operating Voltage: 690V AC (IEC) / 600V AC (UL)
• Trip Class: 10
• Reset Type: Manual/Automatic
• Operating Temperature: -20°C to +60°C (-4°F to +140°F)
• Storage Temperature: -55°C to +80°C (-67°F to +176°F)
• Wiring Cross Section: 2 x (1.5-4 mm²) or 2 x (16-12 AWG)
• Terminal Torque: 1.2 N·m (10.6 lb·in)
• Weight: 0.115 kg (approximate)
• Standards: IEC/EN 60497, UL508, CSA C22.2 No.14
• Certifications: CE, cULus

Applications / Use Case

The Allen Bradley 193-T1AB40 thermal overload relay serves critical motor protection functions in manufacturing facilities, process control systems, and automated production lines where small motors require reliable overcurrent protection. This relay excels in HVAC systems protecting fan motors, conveyor belt drives operating at lower horsepower ratings, and pump control panels handling fractional to small integral horsepower motors. Food processing equipment, packaging machinery, and material handling systems benefit from the phase loss protection that prevents costly motor burnout. The temperature compensation feature makes this overload relay particularly valuable in environments with fluctuating ambient conditions such as warehouses, outdoor control panels, and seasonal production facilities. Industrial water treatment plants use the 193-T1AB40 to protect circulation pumps and chemical metering systems. Machine tool applications including drill presses, grinders, and small lathes rely on this relay for operator safety and equipment longevity. The adjustable trip setting accommodates motors with varying load characteristics, while the manual reset option provides positive confirmation that fault conditions have been addressed before restart.

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