Releu termic PTC Tip MS220K2
  • Releu termic PTC Tip MS220K2

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Producător: ZIEHL

PTC Tip releu termic MS220K2

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

The MS220K2 monitors 2 PTC resistor sets at the same time. If a temperature rise occurs in one set, the appropriate output relay releases. With this relay, 2 PTC-sets can be independently monitored.
Part number:

T22174 AC 220-240 V 1 contact
T221741 24 V AC / DC 1 contact
T221765 AC 220-240 V 2 contacts
T221761 24 V AC / DC 2 contacts



Functional overview

  • 2 PTC-resistor sets, each 1...6 PTC resistors
  • output relays 2 x 1 change-over contact (co)
  • LEDs for operation and alarm
  • UL-Recognized Component


Technical data


Rated supply voltage Us AC 230 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 poin <4000 Ω
Output relay 2 x 1 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. 145 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

The MS220K2 monitors 2 PTC resistor sets at the same time. If a temperature rise occurs in one set, the appropriate output relay releases. With this relay, 2 PTC-sets can be independently monitored.
Part number:

T22174 AC 220-240 V 1 contact
T221741 24 V AC / DC 1 contact
T221765 AC 220-240 V 2 contacts
T221761 24 V AC / DC 2 contacts



Functional overview

  • 2 PTC-resistor sets, each 1...6 PTC resistors
  • output relays 2 x 1 change-over contact (co)
  • LEDs for operation and alarm
  • UL-Recognized Component


Technical data


Rated supply voltage Us AC 230 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 poin <4000 Ω
Output relay 2 x 1 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. 145 g
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