WRM0102

MMEELLFF RReessisisttoorrss WRM Series WRM Series ·· High reliability HPriegdhicrtealibalbeilpituylse handling capability · PToreledriactnacbelsedpouwlsne thoan0.d1l%ing capability · ToClRerdaonwcens tdoo5wpnptmo /0°.C1% TCR down to 5 ppm/°C Welwyn Components Electrical Data Power rating at 70°C Resistance range Limiting element voltage TCR Resistance tolerance Standard values Thermal impedance Ambient temperature range Insulation resistance Physical Data Dimensions (mm) and weight (g) Type L max D max WRM 0102 WRM 0204 WRM 0207 2.2 3.7 6.1 1.35 1.55 2.4 watts ohms volts ppm/°C % k/W °C ohms WRM 0102 0.125 4R7 - 110K 150 50 1 250 WRM 0204 WRM 0207 0.25 0.4 R22 – 5M1 200 R22 – 10M 250 5,10,15, 25, 50, 100 15, 25, 50, 100 0.1, 0.25, 0.5, 1.0, 2, 5 E24 & E96 200 140 -55 to +125 >1010 D1 max 1.3 1.55 2.4 K Weight min 0.3 0.01 0.5 0.02 0.5 0.08 L D1 D L1 K Construction A metal film is deposited onto a high dissipation ceramic former to which tin plated teminating caps are fitted. The resistor is adjusted to value by a helical cut in the film and the body is protected by a lacquer coating. Marking Resistance values are colour coded with four bands, three indicating value and one indicating the multiplier. (Note this describes standard marking, but certain values may still be supplied with the addition of a tolerance band following the multiplier.) Terminations Material Plated steel cap. Solderability The pure tin finish produces agein...