How to Select AMWEI PTC Screw Clamp Type to Cross Murata PTFM Overheat Temperature Sensor in Lug Terminal ?

PTC Limit Temp Sensor Metal Tag Appearance Dimension

AMWEI PTC Limit Temp Sensor Lug Appearance Dimension

Murata PTC Thermistor POSISTOR for Circuit Protection Overheat Sensing Lead Type PTFM Series is a screw clamp type temperature sensor which has been developed for sensing the temperature of Transistors, Thyristors, stereo main amplifiers, and other devices having risk of overheat.

AMWEI PTC Thermsitor Limit Temperature Sensor PTCTP series type B  Lug can be an ideal alternative to Murata PTFM Series.

Then, What is AMWEI PTC Thermsitor Limit Temperature Sensor?

AMWEI PTC Thermistor Limit Temperature Sensor is ceramic PTC thermistor disk with radial lead Lug tag Terminal.
Making use of the characteristics that the resistance of ceramic PTC thermistors increases sharply above curie temperature, when ambient temperature increases abnormally, protective circuit installed PTC thermistor will turn on or cut off loop through resistance changing, achieving thermal protection purpose.

In metal lug construction, applied for temperature sensing and temperature protection due it switches at one particular temperature.

Selecting AMWEI PTC thermistor Limit Temperature Sensor Screw Clamp Type to Cross Murata PTFM Overheat Temperature Sensor in Lug Terminal, the following shall be noted:

  • Max. operating voltage (TA = 0-40 C) Vmax: 30 V DC
  • Measuring voltage (TA = 25 C  Tsense) Vmeas ≤ 2.5 V DC
  • Sensing temperature Tsense can be 70C, 80C, 90C, 100C, 110C, 120C, centigrade.
  • Resistance @25C R25 Ω can be 100 ohm, or 330 ohm max.
  • Resistance at Tsense-15C:  330Ω or 1500Ω max.
  • Resistance at Sensing temperature Tsense: 470Ω or 2200 Ω min.
  • Maximum permissible current: 100mA

Summary

The following table is a summary of AMWEI PTC Thermsitor Limit Temperature Sensor PTCTP series type B Lug Cross to Murata PTFM Series code number.

Technical Knowledge

Typical Application of PTC Limit Temp Sensor

PTC Limit Sensor Industrial Application

How Does PTC Thermistor Temperature Protection Work?

PTC thermistors for motors and transformers Overheat sensing

PTC thermistors overheat sensing protection circuit diagram examples

PTC thermistors Application Cautions for Soldering,  Mounting, Cleaning.

PTC Thermistors Limit Temperature Sensors Protect Power Supplies Against Overheating and Thermal Damage

Murata Part No. AMWEI Ordering Code Sensing Temperature Tsense
(°C)		 Resistance Value @25C (max.)
R25
(Ohm)		 Resistance Value @ Tsense -15C (max.)
(ohm)		 Resistance Value @ Sensing
Temperature
(min.) (Ohm)		 Max.  Voltage Detailed Data
PTFM04BG471Q2N34BS PTCTPB-70C471R-25C101R 70C 100 ohm 330 ohm 470 ohm 30V
PTFM04BF471Q2N34BS PTCTPB-80C471R-25C101R 80C 100 ohm 330 ohm 470 ohm 30V
PTFM04BE471Q2N34BS PTCTPB-90C471R-25C101R 90C 100 ohm 330 ohm 470 ohm 30V
PTFM04BD471Q2N34BS PTCTPB-100C471R-25C101R 100C 100 ohm 330 ohm 470 ohm 30V
PTFM04BC471Q2N34BS PTCTPB-110C471R-25C101R 110C 100 ohm 330 ohm 470 ohm 30V
PTFM04BB471Q2N34BS PTCTPB-120C471R-25C101R 120C 100 ohm 330 ohm 470 ohm 30V
PTFM04BG222Q2N34BS PTCTPB-70C222R-25C331R 70C 330 ohm 1.5k ohm 2.2k ohm 30V
PTFM04BF222Q2N34BS PTCTPB-80C222R-25C331R 80C 330 ohm 1.5k ohm 2.2k ohm 30V
PTFM04BE222Q2N34BS PTCTPB-90C222R-25C331R 90C 330 ohm 1.5k ohm 2.2k ohm 30V
PTFM04BD222Q2N34BS PTCTPB-100C222R-25C331R 100C 330 ohm 1.5k ohm 2.2k ohm 30V
PTFM04BC222Q2N34BS PTCTPB-110C222R-25C331R 110C 330 ohm 1.5k ohm 2.2k ohm 30V
PTFM04BB222Q2N34BS PTCTPB-120C222R-25C331R 120C 330 ohm 1.5k ohm 2.2k ohm 30V