scope:

This specification covers current-regulating resistors consisting of a conductor or group of conductors, hermetically sealed in an envelope containing a suitable gas coolant under pressure, whose current or currents remain substantially constant over a given range of voltage.

The type designation shall be in the following form and as specified (see 3.1 and 6.2):

Resistors covered by this specification are identified by the two-letter symbol "TJ".

The nominal current in milliamperes is designated by a three-digit number; the first two digits are the first two figures of the current and the third digit indicates the number of zeros to follow. When the nominal current is less than 10 milliamperes (ma), the first digit indicating the current is a zero. For example, 123 designates 12,000 ma and 090 designates 9 ma.

The approximate threshold voltage of the current-regulating resistor is designated by a letter in accordance with table I. Threshold voltage is defined as the minimum voltage drop at which regulation is effective within the current limits specified. TABLE I. Voltage

Letter Letter Letter designation Voltage designation Voltage designation Voltage --------------------------------------------------------------------------------------- A ................... 0.18 H ................... 2.0 P ................... 16.0 B ................... .25 J ................... 2.8 R ................... 22.0 C ................... .35 K ................... 4.0 T ................... 32.0 D ................... .5 L ................... 5.5 U .................. 45.0 E ................... .7 M ................... 8.0 V .................. 63.0 F ................... 1.0 N ................... 11.0 W .................. 90.0 G ................... 1.4

The serial order of assignment within the specific group designated by the symbols for current and voltage, is designated by a two-digit number. When the assignment number is less than ten, the first digit shall be a zero.

intended Use: