Manufacturer: ZIEHL industrie-elektronik GmbH
Model / Type: MS220K2
Part Number: T221925
Device Type: PTC-Resistor Relay (Thermistor Monitoring Relay for 2 circuits)
Supply Voltage: AC 230 V, ±10 % 50/60 Hz ≤ 2 VA
PTC Sensor Inputs: 2 × 1…6 PTC resistors or bimetal contacts per circuit (DIN 44081 / DIN 44082)
Switching Point: < 4000 Ω (approx.)
Output Relays: 2 × change-over contacts (CO)
LED Indicators: LEDs for operation and alarm status
Rated Ambient Temperature: −20 °C … +55 °C
Mounting: Snap on 35 mm DIN rail or mounting with screws (M4)
Protection Class: Housing IP30 / Terminals IP20
Dimensions (H × W × D): approx. 75 × 22.5 × 110 mm
Weight: approx. 145 g
Applications: Temperature monitoring and over-temperature protection using PTC thermistor sensors in motors, transformers, and electrical equipment.
