MIL-PRF-39017 Resistors, Fixed, Film \(Insulated\), Nonestablished Reliability, And Established Reliability, General Specification ForThis specification covers the general requirements for nonestablished reliability \(non-ER\) and established reliability \(ER\), insulated, film, fixed resistors. These resistors are capable of full load operation at an ambient temperature of 70 Degrees C and have a resistance temperature characteristic of 100 parts per million \(PPM\) and 350 PPM per degree Celsius \(PPM/Degrees C\). The ER resistors have life failure rate \(FR\) levels ranging from 1.0 percent to 0.001 percent per 1,000 hours \(see 1.2.1.4\). These FR levels are established at a 60 percent confidence level on the basis of life tests. Designers are CAUTIONED on using these resistors in high power pulse applications \(see 6.13.2\).

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MIL-PRF-39017G

3.3 QPL system. The manufacturer shall establish and maintain a QPL system for parts covered by

this specification. Requirements for this system are specified in MIL-STD-790 (all product levels) and

MIL-STD-690 (ER part only). In addition, the manufacturer shall also establish a Statistical Process

Control (SPC) and Part Per Million (PPM) system that meets the requirements as described in 3.3.1 and

3.3.2 respectively.

3.3.1 SPC system. As part of the overall MIL-STD-790 QPL system, the manufacturer shall establish a

SPC system that meets the requirements of EIA-557. Typical manufacturing processes for application of

SPC include film deposition, cap/lead attachment, laser trimming, encapsulation, and weld strength. In

addition, the manufacturer shall demonstrate resistance temperature characteristic (RTC) control in the

process.

3.3.2 PPM system. As part of the overall MIL-STD-790 QPL system, the manufacturer shall establish

a PPM system for assessing the average outgoing quality of lots in accordance with EIA-554-1 and 4.6.4.

Data exclusion, in accordance with EIA-554-1, may be used with approval of the qualifying activity. The

PPM system shall identify the PPM rate at the end of each month and shall be based on a six month

moving average. PPM and dc resistance shall be assessed for each style. Style reporting may include

both non-ER and ER style combinations.

3.4 Material. Material shall be used which will enable the resistors to meet the performance

requirements of this specification. Acceptance or approval of any constituent material shall not be

construed as a guarantee of the acceptance of the finished product.

3.5 Interface and physical dimensions requirements. Resistors shall meet the interface, and physical

dimensions specified (see 3.1). Each resistor shall consist of a film-type resistance element protected

against exposure to humidity and temperature conditions by an enclosure or a coating of moisture-

resistant, insulating material.

3.5.1 Aqueous-extract-conductivity. The manufacturer shall verify by certification that the aqueous-

extract-conductivity, when determined as specified in 4.8.21 does not exceed the values shown below for

the incoming materials for the part indicated:

Maximum conductivity

Part

(siemens (mhos) per cm)

0.5 x 10 -6

Core

3.5.2 Films. Films shall be uniformly deposited.

3.5.3 Terminal leads. Terminal leads shall be of a solid conductor of the length and diameter specified

(see 3.1). Manufacturers shall verify by certification that all leads conform to all requirements of type C of

table II. The leads shall be capable of meeting the requirements of solderability (see 3.16 and figure 1).

Terminal leads meeting requirements specified herein shall be considered solderable and weldable. At

the option of the manufacturer, the terminals may be solder-coated or otherwise treated to meet the

solderability requirements following the power conditioning test specified in 4.8.2.