Overview
The Siemens 3UA5200-0J overload relay is a thermal protection device engineered for industrial motor control circuits. With an adjustable rating range of 0.63A to 1A, this relay protects connected equipment from sustained overload conditions that could cause motor damage or circuit failure. Built to exacting German manufacturing standards, the 3UA5200-0J integrates seamlessly into low-voltage control systems, contactors, and starter configurations.
Key Features
- Adjustable thermal overload protection (0.63A–1A range)
- Reliable bimetallic strip mechanism for precise trip characteristics
- Compact DIN rail or panel-mount form factor
- Compatible with Siemens 3TF and 3TB series contactors and motor starters
- German-engineered design with proven field reliability
- Fast electromagnetic trip response under fault conditions
Technical Specifications
- Part Number: 3UA5200-0J
- Manufacturer: Siemens
- Type: Thermal Overload Relay
- Current Rating: 0.63A–1A adjustable
- Relay Style: Thermal (bimetallic)
- Mounting: DIN rail or base-mounted
- Operating Temperature: 0°C to +55°C ambient
- Compliance: IEC 60947-5-1 / VDE 0660
- Weight: Approximately 0.4 lbs
- Series Family: 3UA5200
Typical Applications
The 3UA5200-0J thermal overload relay is used in:
- Small AC motor protection circuits (fractional to 1 HP range)
- Control panels and industrial automation systems
- Factory automation with low-current motor feeds
- Machine tool control and precision equipment protection
- HVAC and pump motor circuits
- Soft-starter and VFD bypass protection schemes
Compatibility & Replacements
The 3UA5200-0J is part of Siemens’ adjustable thermal overload relay series and is compatible with Siemens 3TF and 3TB series motor contactors and starters. Related models in the 3UA5200 family include the -1A (8–12.5A), -1J (6.3–10A), -1K (8–12.5A), -2A (10–16A), and -2C (12–20A) variants. When replacing or upgrading control circuits, verify contactor base compatibility and current rating alignment with your application requirements. Direct replacement overload relays from other manufacturers may be available; consult your system integrator or panel builder for approved alternatives.
