INCH-POUND
MIL-PRF-29C
5 February 2010
SUPERSEDING
MIL-PRF-29B
30 November 1998
PERFORMANCE SPECIFICATION
RESISTORS, FIXED, METER MULTIPLIER, EXTERNAL
(HIGH VOLTAGE, FERRULE TERMINAL TYPE)
This specification is approved by all Departments
and Agencies of the Department of Defense.
1. SCOPE
1.1 Scope. This specification covers the requirements for high-voltage, external, meter-multiplier, fixed resistors of
the ferrule-terminal type for use with direct-current (dc) instruments drawing 1 milliampere at full-scale deflection.
Designers are CAUTIONED on using these resistors in pulse applications (see 6.5).
1.2 Classification.
1.2.1 Part or Identifying Number (PIN). The PIN must be in the following form and as specified (see 3.1).
MFC
504
Style
Resistance
(1.2.1.1)
(1.2.1.2)
1.2.1.1 Style. The style is identified by a three-letter symbol. The first two letters, MF, identify high voltage,
external, meter-multiplier, fixed resistors of the ferrule-terminal type. The third letter identifies the particular physical
dimensions.
1.2.1.2 Resistance. The nominal resistance in ohms is designated by a three-digit number. The first two digits
represent the first two significant figures of the figures of the resistance value, the third digit indicates the number of
zeros to follow.
1.2.1.2.1 Resistance range. Resistors have a resistance range of 0.5 ohm to 20 megohms.
1.2.1.2.2 Nominal resistance and rated voltage. Nominal resistance and rated voltages are as specified in table I.
TABLE I. Nominal resistance and rated voltage.
Type
Nominal resistance
Rated voltage
Type
Nominal resistance
Rated voltage
designation
in megohms
in kilovolts
designation
in megohms
in kilovolts
MFC504
0.5
0.5
MFB355
3.5
3.5
MFC804
0.8
0.8
MFA355
3.5
3.5
MFC105
1.0
1.0
MFA405
4.0
4.0
MFB105
1.0
1.0
MFA505
5.0
5.0
MFB155
1.5
1.5
MFA605
6.0
6.0
MFB205
2.0
2.0
MFD106
10.0
10.0
MFB255
2.5
2.5
MFE156
15.0
15.0
MFB305
3.0
3.0
MFF206
20.0
20.0
Comments, suggestions, or questions on this document should be addressed to: Defense Supply Center, Columbus,
ATTN: DSCC VAT, Post Office Box 3990, Columbus, Ohio 43218-3990 or by email Resistor@dla.mil. Since contact
information can change, you may want to verify the currency of this address information using the ASSIST Online
database at https://assist.daps.dla.mil/
AMSC N/A
FSC 5905
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