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Thermal protector of type M1

Thermal protector of type M1

Thermal protector of type M1

Product catalog summary
Technical Specifications:
Diameter with/without insulation cap: 10.6/10.2 mm
Height with/without insulation cap: 3.4/3.0 mm
Housing length: 11.5 mm
Length of insulation cap: 19.0 mm
Application:
The M1 thermal protector is used for overheating protection in electrical equipment, particularly suitable for electric motors requiring automatic resetting after cooling.
Design:
The M1 switch features a flat design based on Thermik's Series 01 mechanism, ensuring high insulation and contact resistance.
Operation:
Upon reaching the rated switching temperature, the bimetallic disc snaps open the contact. It resets to close the contact after cooling.
Features:
  • Flat design
  • Automated production for high volume
  • Available in tape or spool for automated lines
  • Quick response due to small mass and metal housing bottom
  • Excellent long-term performance with fine silver contacts
  • Instantaneous switching with constant pressure
  • Short bounce times (<1 ms)
  • High temperature resistance
Technical Data:
  • Contact type: Normally closed (NC)
  • Nominal switching temperature: 70°C – 180°C
  • Standard tolerance: ± 5 K
  • Operating voltage: Up to 500 V AC
  • Rated voltage: 250 V AC
  • Rated current: 2.5 A (cos ϕ = 1.0), 10,000 cycles
  • Max switching current at 250 V AC: 6.3 A (cos ϕ = 1.0), 3,000 cycles
  • Contact bounce time: < 1 ms
  • Impregnation resistance: Suitable (VM1)
  • Contact resistance: < 50 mΩ
  • Vibration proof: 100 m/s² at 10-60 Hz
  • Pressure stability: 450 N
  • Switch insulation: Mylar – Nomex® or Mylar®
  • Dielectric strength: 2 kVr.m.s.
  • Standard connection leads: Multi-stranded wire 0.25mm² (AWG 22)
Approvals:
Complies with VDE, IEC, UL, and c-UL standards.
Ordering Information:
Example: SM1 - 125 . 05 . 0100 / 0100
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Catalog excerpts

Thermal protector of type M1-1

Temperature limiting switches of Series M - Type M1 are utilised for overheating protection of all kinds of electrical equipment or devices, most suitable for electrical motors whereat after overheating and subsequent cooling an automatic resetting is required. The series M1 is fully automatically assembled. By this, the insulation resistance and the contact resistance are checked 100%. Versions SM1, VM1 and CM1 > Diameter d (with / without insulation cap) 10.6 / 10.2 mm Height h (with / without insulation cap) 3.4 / 3.0 mm The temperature limiting switch Type M1 is based on the well proven mechanism principle of Thermiks product series 01. Due to a new housing, a specially flat design is reached. Versions: > housing length x 11.5 mm Length of insulation cap l Versions UM1 PM1 > 19 .0 mm SM1 > insulation cap connection leads single VM1 > insulation cap connection leads single, impregnation resistant CM1 > - connection leads single UM1 PM1 > - crimp contacts single or on tape - pcb-terminals single or on tape If, in the case of overheating, the rated switching temperature of the bimetallic disc is reached, it suddenly snaps over and opens the contact. After cooling down beyond its resetting temperature, the bimetallic disc resets to close the contact. > Specially flat design Fully automated production : for a high number of pieces within short time Versions on tape, on spool : for customers automated production lines Quick response sensitivity : featured by small protector mass and the metal bottom of the housing Excellent long term performance : due to instantaneous switchi ng, fine silver contacts, constant contact resistance and to electrically as well as mechanically unstressed bimetallic disc, reproducible switching temperature values Instantaneous switching : with constant contact pressure over the whole temperature range Very short bounce times : < 1 ms Temperature resistance : by use of high temperature resistant materials and components > Thermik GerҤtebau GmbH P.O. Box 101980 Օ D-75119 Pforzheim Germany Օ Phone: +49 (72 31) 60 04 -0 Fax: +49 (72 31) 60 04 -100 size="-3">

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Thermal protector of type M1-2

M1 125 > 5 Type Rated switching temperature [ C ] , > Tolerance [ K ] : SM1 - 125 . 05 . 0100 / 0100 Type and version Rated switching temperature [ аC ] Tolerance [ K ] Lead lengths [ mm ] > The indicated values in this data sheet can differ for special designs. We reserve the right to modify technical specifications without notice. For latest actual data please refer to our product catalogues available on our websites: www.thermik.de / www.thermik.com Rev.: 04-2009 size="-2">

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