TMC

www.vishay.com

Vishay Huntington

Revision: 23-Jun-16

4

Document Number: 31806

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

MATERIAL SPECIFICATIONS

Element: copper-nickel alloy or nickel-chrome alloy,

depending on resistance value

Core: ceramic, steatite or alumina, depending on physical

size

Encapsulant: silicone molded construction

Housing: aluminum with hard anodic coating

End Caps: stainless steel

Standard Terminals: For TMC005 through TMC050 size

terminal finish - Lead (Pb)-free is Ni/Pd/Au, finish is on

copper clad steel core terminal. For TMC100 and TMC250

terminals are threaded stainless steel.

Part Marking: HEI, model, wattage, value, tolerance, date

code

TMC NON-INDUCTIVE

Models of equivalent physical and electrical specifications

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

They are

identified

by

model

number with

special

(TMC005…NI, for example).

SPECIAL MODIFICATIONS

A number of special modifications to the aluminum housed

resistor

style

are

available

upon

request.

Special

modifications include:

• Terminal configurations and materials

• Resistance values and tolerances

• Low resistance temperature coefficient (RTC)

• Housing configuration

• Threaded mounting holes

• Preconditioning and other additional testing

PERFORMANCE

TEST

CONDITIONS OF TEST

TEST LIMITS

Thermal Shock

Rated power applied until thermally stable, then a minimum of 15 min at -55 °C

± (0.5 % + 0.05

) R

Short Time Overload

5x rated power for 5 s

± (0.5 % + 0.05

) R

Dielectric Withstanding



Voltage

± (0.2 % + 0.05

) R

High Temperature Storage

250 °C for 2 h

± (0.5 % + 0.05

) R

Moisture Resistance

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

± (1.0 % + 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

Load Life

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

± (1.0 % + 0.05

) R

Terminal Strength

30 s, 5 pound pull test for TMC005 and TMC010, 10 pound pull test for other sizes

± (0.2 % + 0.05

) R