Releu termic PTC tip IMR220K
  • Releu termic PTC tip IMR220K

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Producător: ZIEHL

Releu termic MSR220K PTC

ZIEHL PTC-resistor relays protect motors, transformers, machines and equipment against thermal overload. With ZIEHL PTC Sensors MINIKA ® applied they offer best solutions for nominal response temperatures 60°C…180°C.

ZIEHL PTC-resistor relays are designed for PTC-sensors according to DIN 44081 and DIN 44082. Therefor sensor and relays are exchangeable. PTC-resistor sensors are suitable for the installation into windings of electrical machines, bearings and transformers as well as to monitor the temperature of liquid media, airflow and gases.
Used in conjunction, they provide a effectively and reliable protection in case of:
  • blocking rotors, heavy starts, countercurrent operation
  • undervoltage and phase failure
  • increased ambient temperature and hindered cooling

Part number:
T221775 AC 220-240 V 2 kontakty
T221771 AC/DC 24 V 2 kontakty





Functional overview


  • 1 PTC-resistor set with up to 6 PTC-sensors (250Ω) in series
  • output relay with 1 or 2 change-over contact (co)
  • operating status display with LED
  • K-Housing, vertical terminal order
  • width 22.7 mm
  • snap mounting on 35 mm standard DIN rail or screw mounting
  • electronic reclosing lock (disconnectable)
  • integrated RESET-button
  • link for external RESET
  • automatic RESET at voltage recovery
  • LEDs for power ON (green) and ALARM (red) in reset-button
  • UL recognized component
  • Option: other supply voltages


Technical data


Rated supply voltage Us AC 220 - 240 V ± 10 % 50/60 Hz ≤ 2 VA
AC/DC 24 V, AC ± 10 % DC 21- 30 V < 2 VA,
without potential separation
Connectable PTC resistors 1...6 PTC according DIN VDE V 0898-1-401 (formerly DIN 44081/82)
Switching point <4000 Ω
Output relay 1 or 2 change-over-contact (co)
Type of contact Type 2 (see general technical information)
Test conditions see general technical information
Rated ambient temperature -20 ... + 55 ° C
Dimensions h x w x d Design K: 75 x 22.5 x 115 [mm]
Attachment on 35 mm DIN rail according to EN 60 715 or screws M4
Protection Housing/Terminals IP30 / IP20
Weight approx. 150 g
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ZIEHL PTC-resistor relays protect motors, transformers, machines and equipment against thermal overload. With ZIEHL PTC Sensors MINIKA ® applied they offer best solutions for nominal response temperatures 60°C…180°C.

ZIEHL PTC-resistor relays are designed for PTC-sensors according to DIN 44081 and DIN 44082. Therefor sensor and relays are exchangeable. PTC-resistor sensors are suitable for the installation into windings of electrical machines, bearings and transformers as well as to monitor the temperature of liquid media, airflow and gases.
Used in conjunction, they provide a effectively and reliable protection in case of:
  • blocking rotors, heavy starts, countercurrent operation
  • undervoltage and phase failure
  • increased ambient temperature and hindered cooling

Part number:
T221775 AC 220-240 V 2 kontakty
T221771 AC/DC 24 V 2 kontakty





Functional overview


  • 1 PTC-resistor set with up to 6 PTC-sensors (250Ω) in series
  • output relay with 1 or 2 change-over contact (co)
  • operating status display with LED
  • K-Housing, vertical terminal order
  • width 22.7 mm
  • snap mounting on 35 mm standard DIN rail or screw mounting
  • electronic reclosing lock (disconnectable)
  • integrated RESET-button
  • link for external RESET
  • automatic RESET at voltage recovery
  • LEDs for power ON (green) and ALARM (red) in reset-button
  • UL recognized component
  • Option: other supply voltages


Technical data


Rated supply voltage Us AC 220 - 240 V ± 10 % 50/60 Hz ≤ 2 VA
AC/DC 24 V, AC ± 10 % DC 21- 30 V < 2 VA,
without potential separation
Connectable PTC resistors 1...6 PTC according DIN VDE V 0898-1-401 (formerly DIN 44081/82)
Switching point <4000 Ω
Output relay 1 or 2 change-over-contact (co)
Type of contact Type 2 (see general technical information)
Test conditions see general technical information
Rated ambient temperature -20 ... + 55 ° C
Dimensions h x w x d Design K: 75 x 22.5 x 115 [mm]
Attachment on 35 mm DIN rail according to EN 60 715 or screws M4
Protection Housing/Terminals IP30 / IP20
Weight approx. 150 g
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Citeste mai mult