This part is a kind of semiconductor called MZ72-18RM.
Function of this product has PTC THERMISTOR.
Manufacturers : ETC
Image and pinout :
Some of the text within the PDF file :
PTC THERMISTOR FEATURES * High ageing cofficient * Superior withstanding voltage oxidation-resistance CHARACTERISTICS Current-Time Curve Resistance-Temperature Curve HOW TO ORDER MZ ① 2 ② ① PTC Thermistor 1 ③ L ④ 201 ⑤ ② 7 9 2 3 4 Product style Degaussing P~ Starter Current-Limited Delay-Time Auto-Control-heat R ⑥ M ⑦ ③ MZ7 MZ2 MZ9 MZ3 MZ4 ⑥ OHM Sequence No. The number expresses No, of pin 1.Coating type 2.Plastic type 3.Empty body No mark 1. Round 2. Queue ⑦ Tolerance K ± l0% M ± 20% N ± 30% ④ switch Temperature 40 ℃ 60 ℃ 80 ℃ 100℃ 120℃ 135℃ ⑤ Resistance Value 201=20x10 8R0=8.0 L K M N P R MZ9 TYPE Starter PTC THERMISTOR FEATURES *As a non-tounched swich in cold compressor and motor. *High reliability life etc. APPLI [ ... ]