BI Technologies IRC Welwyn

WCM Series

07.20

General Note

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All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.

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High Pulse Carbon Film MELF Resistors

±

ΔR

Short time overload: 5s at lesser of 6.25 x rated power or 2 x LEV

0.5% + 0.1Ω

Climatic sequence: BS EN 60115-1:2011+A11 2015, Method 4.23

0.5% +0.1Ω

Bending test: 2mm deflection for 60s

0.25% + 0.1Ω

Resistance to soldering heat: 260±5°C for 10±1 sec

1% + 0.05Ω

Temperature rapid change: 1000cycles-55/125°C

1.5% + 0.1Ω

Endurance (cyclic load): 1000hrs rated power at 125°C

2% + 0.05Ω

Endurance (constant load): 1000hrs rated power at 70°C

2% +0.05Ω

Vibration: 5g for 20min, 12 cycles each of 3 orientations, 10-2000Hz

0.5% + 0.1Ω

ESD: 2kV human body model

0.5% + 0.05Ω

Solderability: 235±5°C for 3±0.5sec

>95% coverage

Voltage proof: 1.42 x LEV

No flashover or breakdowns

Performance Data

De-rating Curve

0207

0204