HL, NHL

www.vishay.com

Vishay Dale

Revision: 12-Mar-14

3

Document Number: 30208

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

MOUNTING HARDWARE

Mounting hardware is available for HL resistors, see HL Brackets and Sliders datasheet for more information:

www.vishay.com/doc?30279

MATERIAL SPECIFICATIONS

Element: Copper-nickel alloy of nickel-chrome alloy,

depending on resistance value

Core: Ceramic, steatite

Coating: Special high temperature silicone

Standard Terminals: Model “E” terminals are tinned steel

Terminal Bands: Steel

Part

Marking:

Vishay Dale, model, wattage, value,

tolerance, date code

NHL NON-INDUCTIVE

Models of equivalent physical and electrical specifications

are available with non-inductive (Ayrton-Perry) winding.

They are identified by adding the letter N to the front of the

HL type designation (NHL225 for example). For NHL models

maximum resistance values are lower, see Standard

Electrical Specifications table.

DERATING

TECHNICAL SPECIFICATIONS

PARAMETER

UNIT

HL, NHL RESISTOR CHARACTERISTICS

Temperature Coefficient

ppm/°C

± 30 for 10

 and above; ± 50 for 1  to 9.9 ; ± 90 for 0.1  to 0.99 

Short Time Overload

-

10 x rated power for 5 s

Dielectric Withstanding Voltage

1000, from terminal to mounting hardware

Maximum Working Voltage

V

Insulation Resistance



1000 M

 minimum dry, 100 M minimum after moisture test

Operating Temperature Range

°C

- 55 to + 350

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

) R

Short Time Overload

10 x rated power for 5 s

± (2.0 % + 0.05

) R

Dielectric Withstanding Voltage

± (0.1 % + 0.05

) R

Low Temperature Storage

- 55 °C for 24 h

± (2.0 % + 0.05

) R

High Temperature Exposure

250 h at + 350 °C

± (2.0 % + 0.05

) R

Humidity

75 °C, 90 % to 100 % RH, 240 h

± (5.0 % + 0.05

) R

Load Life

1000 h at rated power, + 25 °C, 1.5 h “ON”, 0.5 h “OFF”

± (3.0 % + 0.05

) R

Moisture Resistance

MIL-STD-202 Method 106, 7b not applicable

± (2.0 % + 0.05

) R

Shock, Specified Pulse

MIL-STD-202 Method 213, 100

g’s for 6 ms, 10 shocks

± (0.2 % + 0.05

) R

Vibration, High Frequency

Frequency varied 10 Hz to 2000 Hz, 20

g peak, 2 directions 6 h each

± (0.2 % + 0.05

) R

- 65 - 50

0

50

150

250

350

AMBIENT TEMPERATURE IN °C

120

100

80

60

40

20

0

25