Manufacturer: ZIEHL industrie-elektronik GmbH
Model / Type: MS220KA
Part Number: T222455 (PTC-Resistor Relay, AC 220-240 V, 2 change-over contacts)
Device Type: PTC / Thermistor Relay (over-temperature protection relay)
Electrical & Sensor:
Supply Voltage: AC 220 – 240 V ± 10 % (50/60 Hz)
Power Consumption: ≤ 2 VA
PTC Sensor Input: 1 set of 3 or 6 PTC thermistors (DIN 44081 / DIN 44082)
Short-Circuit Monitoring: Yes (sensor circuit break/short)
Outputs & Contacts:
Relay Outputs: 2 × change-over contacts (CO)
Rated Switching Voltage: max. AC 400 V
Conventional Thermal Current (Ith): max. 5 A
Switching Power (AC): max. 2000 VA
Contact Characteristics:
Contact Ratings:
• AC-15: Ie = 3 A @ 250 V AC
• DC-13: Ie = 2 A @ 24 V DC
PTC Monitoring Thresholds:
Temperature Cut-Out (Trip) Point: approx. 3.3 kΩ … 3.85 kΩ
Reclosing Point: approx. 1.7 kΩ … 1.95 kΩ
Short Circuit Cut-Out: ≤ 20 Ω
Short Circuit Reclosing: ≤ 40 Ω
Mechanical & Environmental:
Housing Type: K-housing, vertically arranged terminals
Dimensions (W × H × D): approx. 22.5 × 75 × 115 mm
Mounting: Snap mounting on 35 mm DIN-rail or M4 screw option
Protection Class: IP 30 (housing) / IP 20 (terminals)
Rated Ambient Temperature: −20 °C … +55 °C
Weight: approx. 150 g
Safety & Standards:
Approvals: ATEX 2014/34/EU, SIL 1 (IEC 61508), PL c (ISO 13849), CE, UL Recognized Component
