MIL-R-10509J
TABLE I. Characteristic.
Maximum resistance temperature ─ Percent1qC → characteristic (see 3.17) ─ ppm1qC → |
C |
D |
E |
F |
G 11 |
±0.005 ±50 |
+0.02, -0.05 +200, -500 |
±0.0025 ±25 |
±0.005 ±50 |
+0.02, -0.05 +200, -500 |
|
Maximum ambient temperature at rated wattage (see figure 1) |
125qC |
70qC |
125qC |
125qC |
70qC |
Maximum ambient temperature at zero wattage derating (see figure 1) |
175qC |
165qC |
175qC |
175qC |
165qC |
Power rating in watts and maximum dc or rms voltage. RN50 RN55 RN60 RN65 RN70 |
0.05 W, 200 V 0.1 W, 200 V 0.125 W, 250 V 0.25 W, 300 V 0.5 W, 350 V |
21 0.125 W, 200 V 0.25 W, 300 V 0.5 W, 350 V 0.75 W, 500 V 31 |
0.05 W, 200 V 0.1 W, 200 V 0.125 W, 250 V 0.25 W, 300 V 0.5 W, 350 V |
21 21 21 0.5 W, 350 V 0.75 W, 500 V 31 |
21 0.1 W, 200 V 0.125 W, 250 V 0.25 W, 300 V 0.5 W, 350 V |
Maximum percent change in resistance ±: Thermal shock (see 3.9) Low temperature operation (see 3.10) Short time overload (see 3.11) Dielectric withstanding voltage (see 3.13) Resistance to soldering heat (see 3.15) Moisture resistance (see 3.16) Life (see 3.18) Shock, specified pulse ( see 3.20) Vibration, high frequency (see 3.21) |
0.25 0.25 0.25 0.25 0.1 0.5 0.5 0.25 0.25 |
0.5 0.5 0.5 0.5 0.5 1.5 1.0 0.5 0.5 |
0.25 0.25 0.25 0.25 0.1 0.5 0.5 0.25 0.25 |
0.25 0.25 0.25 0.25 0.1 0.5 0.5 0.25 0.25 |
0.25 0.25 0.25 0.25 0.1 0.5 0.5 0.25 0.25 |
Resistance tolerances ± percent (see table IV) |
1.0, 0.5 0.25, 0.1 |
1.0 |
1.0, 0.5 0.25, 0.1 |
1.0, 0.5 0.25, 0.1 |
1.0 |
11 Hermetically sealed only ( see 3.8).
21 Not available.
31 Formerly rated at 1 watt and is the direct replacement for RN70 of MIL-R-10509D.
1.2.1.3 Resistance. The nominal resistance expressed in ohms is identified by four digits: The first three digits represent significant figures and the last digit specifies the number of zeros to follow. When the value of resistance is less than 100 ohms, or when fractional values of an ohm are required, the letter "R" is substituted for one of the significant digits to represent the decimal point. When the letter "R" is used, succeeding digits of the group represent significant figures. The resistance value designations are shown in table II. Minimum and maximum resistance values are as specified (see 3.1). The standard values for every decade follows the sequence demonstrated for the "0 to 100" decade in table III. Although resistance tolerances B and C (see 1.2.1.4) normally require more than three significant figures to adequately describe the true resistance value, for the purpose of this specification, the nominal value are three significant figures followed by the fourth digit to signify the number of zeros to follow. The
resistance values for 0.10 percent resistance tolerance (B) may be of any value, but it is preferred that the values be chosen the 192 value series decade specified for resistance tolerances C and D. Resistance values not listed in table III for tolerance F and D are considered as not conforming to this specification.
2
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