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MIL-PRF-914 Resistor Networks, Fixed, Film, Surface Mount, Nonestablished Reliability, And Established Reliability, General Specification ForThis specification covers the general requirements for nonestablished reliability \(non-ER\) and established reliability \(ER\), hermetically sealed \(see 3.27\) and nonhermetically sealed networks \(see 3.27.1\). These networks consist entirely of fixed, film resistors. They are primarily intended for use in surface mount applications where space is a major concern. ER resistors covered by this specification will have life failure rates \(FR\) ranging from 1 percent to 0.001 percent per 1,000 hours \(see 1.2.1.7\). The ER FR are established at a minimum 60-percent confidence level on the basis of life tests. Designers are CAUTIONED on using these resistors in pulse applications \(see 6.4.4\).

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MIL-PRF-914C

TABLE I. Characteristics.

Characteristics

Test or condition

Units

C 1/

Resistance-temperature

�25

�50

�100

�300

�50

characteristic (see 3.13)

ppm/OC

Tracking to the reference element

�5

Maximum ambient temperature

at rated wattage (see 3.6)

Maximum ambient temperature at

125

zero power derating (see figure 1)

ΔR

Thermal shock (see 3.8) and

�.50

�.25

�.70 3/ �.70 3/

ΔRatio

Power conditioning (see 3.9)

�.03

ΔR

Thermal shock

�.25

�.15

�.50 3/ �.50 3

ΔRatio

(see 3.8)

�.03

Low temperature operation

ΔR

(see 3.14)

�.25

�.50

�.10

ΔRatio

�.02

Short-time overload

(see 3.15)

Maximum

ΔR

Terminal strength

�.10

�.25 3/ �.25 3/ �.25 3/

percent change

ΔRatio

(see 3.17)

�.03

in resistance

ΔR

Resistance to soldering heat

�.25

(0.01 ohm

�.25 3/ �.25 3/ �.25 3/

ΔRatio

(see 3.20)

�.02

additional

ΔR

Moisture resistance

�.40

.20

allowed for

�.20

�.50 3/ �.50 3/

ΔRatio

(see 3.21)

�.02

measurement

�.02

error). When

Shock, specified pulse

ΔR

applicable

�.25

(see 3.22)

�.25

�.25 3/ �.25 3/ �.25 3/

ΔRatio

maximum

�.03

Vibration, high frequency

percent change

(see 3.23)

in resistance

ΔR

Life

�.50

�.50 3/ �.50 3/ �.50 3/

ratio.

ΔRatio

(see 3.24.1)

�.03

FR level

�2.0

ΔR

High temperature Exposure

�.50

�1.0

�.10

�.20

�.10

ΔRatio

(see 3.25)

�.03

ΔR

Low temperature storage

�.25

�.50

�.10

ΔRatio

(see 3.26)

�.02

ΔR

Steady-state humidity

�.40

�.50

�.20

ΔRatio

(see 3.28)

�.02

Insulation resistance (see 3.19)

10,000

Megohms

Resistance, tolerance and, when

� percent

applicable, resistance ratio accuracy

(see 3.10.3)

Hermetically sealed resistor network (see 3.27).

Not applicable.

Delta ratio are not applicable.