Allen-Bradley 193-A5D1 Overload Relay

Allen-Bradley 193-A5D1 overload relay (Series A) provides motor overload protection when used with compatible Allen-Bradley contactors in standard motor-control circuits. It’s configured for a 1.0–2.9 A trip range with a Class 20 timing rating, enabling it to trip when motor current exceeds the preset threshold within a short, defined delay. As part of the 193 Bulletin family, the 193-A5D1 is designed to be used with the matching starter assembly to guard small to mid-size motors from overheating due to abnormal current draw. In practice, the relay sits in the motor control circuit and monitors line current; when the preset limit is reached, it signals the contactor to open, interrupting motor power and helping prevent winding damage and insulation failure. This model is commonly used in industrial control panels where reliable, current-based protection is required and compatibility with Allen-Bradley starters ensures straightforward integration into existing control hardware.