Overview
The Siemens 3TH8244-0A is an 8-pole auxiliary contactor and control relay rated to international standard IEC 60947-5-1 (EN 50011). The 44E designation identifies it as a compact auxiliary contactor suitable for use within motor starter assemblies and industrial control systems. This model features fixed contact configuration with no moving parts in the auxiliary function, making it ideal for reliable auxiliary switching in AC motor control circuits.
Key Features
- 8-pole contact configuration with 4 normally open (NO) and 4 normally closed (NC) auxiliary contacts
- 44E identification for compact DIN-mount installation
- IEC 60947-5-1 and EN 50011 compliant
- Suitable for use with Siemens 3TH series motor control systems
- Thermoplastic insulation with double-insulated construction
- Designed for AC motor applications in industrial automation circuits
Technical Specifications
- Series: Siemens 3TH (IEC Motor Starter Series)
- Type: Auxiliary Contactor / Control Relay
- Contact Configuration: 4NO + 4NC (8-pole total)
- Designation: 44E
- Maximum Voltage Rating: 660V AC
- Maximum Current Rating (AC11): 16A at 220V; 10A at 380V; 6A at 500V; 2A at 660V
- Contact Type: Fixed auxiliary contacts
- Standards Compliance: IEC 60947-5-1, EN 50011, VDE 0660, IEC 337, BS 4794
- Mounting: DIN rail or panel mount compatible
- Weight: Approximately 1.20 lbs
- Operating Temperature Range: Standard industrial (-5°C to +55°C typical)
Typical Applications
- Auxiliary switching in AC motor starter circuits
- Interlocking and interlock logic control in industrial automation
- Remote monitoring and signaling functions
- Circuit control and sequencing in machinery control panels
- Integration with larger Siemens 3TH series motor starters and soft starters
- Motor protection and control system auxiliary functions
Compatibility & Replacements
Compatible With
- Siemens 3TH series motor starters and contactors
- Siemens 3R and 3U series motor protection systems
- Standard 24V/48V/110V/220V AC and DC control circuits
- DIN rail and panel-mounted control panel assemblies
- IEC-compliant industrial automation systems
Replaces / Drop-In Replacement For
- Other 8-pole 4NO+4NC auxiliary relays with 44E footprint and IEC 60947-5-1 compliance
- Legacy Siemens 3TH auxiliary contact blocks in compatible systems
Works With
- Siemens STEP 5, S5, and S7 programmable logic controllers
- Industrial control relays and timing modules
- Motor overload relays and thermal protection devices
- AC motor starters and soft-start drives
- Standard 50/60 Hz AC control circuits
