器件名称: W30
功能描述: Cement Coated Wirewound Resistors
文件大小: 116.74KB 共2页
简 介:Cement Coated Wirewound Resistors
W30 Series
Welwyn Components
Values down to 10m ohms Tolerance to 1% Flameproof protection Custom built to meet pulse requirements
Electrical Data
W31 Power rating at 25°C Power rating at 70°C Resistance range TCR (-55 to 155°C) Resistance tolerance Standard values Thermal impedance Ambient temperature range Limiting element voltage TCR °C/watt °C volts ppm/°C watts watts ohms ppm/°C % 3.0 2.5 0R01 to 10K See below 5 2 1 E24 series preferred 83 -55 to 155 100 0.01 ohms <1000 0.033 ohms <500 0.091 ohms <200 10 ohms <150 10K ohms <100 Other values to special order Notes
Physical Data
Maximum Dimensions (mm) and Weight (g) Type W31 L max. 13 D max. 5.6 f min. 22.75 d nom. 0.8 Wt.nom. 1.0
d D L f
Construction
A high quality ceramic substrate is assembled with interference fit end caps to which are welded the element winding and termination wires. The protection is then applied to the body, providing an effective seal which is impervious to moisture, shock, vibration, fungus and salt spray.
Marking
W31 resistors are legend marked with type reference, resistance value and tolerance. Values are marked in accordance with IEC 62.
Solvent Resistance
The body and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits.
Terminations
Material Strength Solderability Solder coated copper. The terminations meet the requirements of IEC 68.2.21. The terminations meet the requirements of IEC 115-1, Clause 4.17.……
