Ch-technology NHLM Manual de usuario descargar pdf (Pagina 4)

HL, NHL FLAT and HLM, NHLM

Wirewound Resistors,

Industrial Power, Flat (HL), Miniature Flat (HLM)

Vishay Dale

Document Number: 30209 For technical questions, contact: ww2bresistors@vishay.com

www.vishay.com

Revision: 13-Jul-07 75

Derating is required for ambient temperatures above 25 °C per the following graph.

- 65 - 50 0 50 150 250 350

AMBIENT TEMPERATURE IN

°C

120

100

% N I R E W O P D E T A R

Derating

PERFORMANCE

TEST CONDITIONS OF TEST TEST LIMITS

Thermal Shock

Rated power applied until thermally stable,

then a minimum of 15 min at - 55 °C

± (2.0 % + 0.05 Ω) ΔR

Short Time Overload 10 x rated power for 5 s ± (2.0 % + 0.05 Ω) ΔR

Dielectric Withstanding Voltage 1000 V

rms

, 1 min ± (0.1 % + 0.05 Ω) ΔR

Low Temperature Storage - 55 °C for 24 h ± (2.0 % + 0.05 Ω) ΔR

High Temperature Exposure 250 h at + 350 °C ± (2.0 % + 0.05 Ω) ΔR

Moisture Resistance MIL-STD-202 Method 106, 7b not applicable ± (2.0 % + 0.05 Ω) ΔR

Shock, Specified Pulse MIL-STD-202 Method 213, 100 g's for 6 ms, 10 shocks ± (0.2 % + 0.05 Ω) ΔR

Vibration, High Frequency Frequency varied 10 to 2000 Hz, 20 g peak, 2 directions 6 h each ± (0.2 % + 0.05 Ω) ΔR

Load Life 1000 h at rated power, + 25 °C, 1.5 h “ON”, 0.5 h “OFF” ± (3.0 % + 0.05 Ω) ΔR

1 2 3 4 5

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Ch-technology NHLM Manual de usuario Pagina 4