Overview
The Siemens 3TH8253-0A is an industrial-grade auxiliary contactor relay designed for control circuits in machinery, process automation, and electrical panel applications. As an 8-pole IEC-compliant relay with fixed contact configuration (5NO + 3NC), it provides reliable signal amplification and switching for electromagnetic coil control in 50/60 Hz installations.
Key Features
- 8-pole relay with 5 normally open (NO) and 3 normally closed (NC) contacts
- 10 Ampere contact current rating
- Rated for AC circuits up to 600V and DC circuits up to 600V
- IEC 60947-5-1 and EN 50 011 compliance
- Suitable for 50/60 Hz control circuits with 220V AC operation
- Designed for amplification and transfer of control signals to magnetic coils
Technical Specifications
- Contact Configuration: 5NO + 3NC (8 fixed contacts)
- Contact Current Rating: 10 Amperes
- Rated AC Voltage: 600V maximum
- Rated DC Voltage: 600V maximum
- Coil Voltage: 220V AC 50/60 Hz
- Standards Compliance: IEC 60947-5-1, EN 50 011, VDE 0660
- Thermal Current (Ith2): 16A
- Operating Temperature Range: -25°C to +55°C
- Weight: 440 grams
- Series Designation: 3TH82 53E
Typical Applications
- Motor control circuits and starter interlocking
- Machine automation and process control
- Auxiliary switching in electrical switchboards and control panels
- Signal relay and amplification in industrial control systems
- Load switching in AC and DC control circuits
Compatibility & Replacements
Compatible With
- Siemens SIRIUS motor control systems
- Standard IEC 60947-5-1 control circuits
- Industrial electrical panels and switchgear assemblies
- Standard DIN rail mounting systems (vertical installation)
- AC/DC control circuits rated 50/60 Hz
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator before ordering. Similar units include Siemens 3TH4253-0AM0 (newer SIRIUS generation) in 5NO+3NC configuration, though direct drop-in interchangeability should be confirmed.
Works With
- Siemens SIRIUS motor starters and contactors
- Standard IEC contactor systems
- Relay logic and hardwired control circuits
- AC and DC electromagnets and solenoids
- DIN-mounted auxiliary switching blocks
