MIL-PRF-49137 Capacitors, Fixed, Electrolytic \(Solid Electrolyte\), Tantalum, Molded, Conformal Coated And Metal Cased With Plastic End-Fill, Nonhermetically Sealed, General Specification ForThis specification covers the general requirements for fixed, electrolytic \(solid electrolyte\), tantalum, molded, conformal coated and metal cased with plastic end-fill nonhermetically sealed capacitors, primarily intended for filter, bypass, coupling, and other applications where the alternating current \(ac\) component is small compared to the direct current \(dc\) rated voltage. These capacitors are intended to be used only where supplemental moisture protection is provided or for noncritical applications where hermetic moisture protection is not required.

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MIL-PRF-49137E

3.12 Thermal shock. When tested as specified in 4.8.9, capacitors shall meet the following requirements:

a. DC leakage: Shall not exceed the requirement specified in 3.7.

b. Capacitance: Shall not change more than �10 percent from the initial measured value (see 3.8).

c. Dissipation factor: Shall not exceed the requirement specified in 3.9.

d. Visual examination: There shall be no evidence of harmful corrosion, mechanical damage, and obliteration of

marking wherever applicable.

3.13 Resistance to soldering heat. When capacitors are tested as specified in 4.8.10, there shall be no evidence

of mechanical damage.

3.14 Terminal strength. When capacitors are tested as specified in 4.8.11, there shall be no loosening of the

terminals or permanent damage to the terminals.

3.15 Moisture resistance. When tested as specified in 4.8.12, capacitors shall meet the following requirements:

a. DC leakage: Shall not exceed 300 percent of the requirement specified in 3.7.

b. Capacitance: Shall not change more than �15 percent from the initial measured value (see 3.1 and 3.8).

c. Dissipation factor: Shall not exceed 150 percent of the requirement specified in 3.9.

d. Visual examination: There shall be no evidence of harmful corrosion, mechanical damage, or obliteration of

marking wherever applicable.

3.16 Stability at low and high temperatures. When tested as specified in 4.8.13, capacitors shall meet the

following requirements:

a. Step 1 (+25�C):

(1) DC leakage: Shall not exceed the applicable value specified (see 3.1).

(2) Capacitance: Shall be within tolerance of the nominal value specified (see 3.1).

(3) Dissipation factor: Shall not exceed the applicable value specified (see 3.1).

b. Step 2 (-55�C):

(1) Capacitance: Shall not change more than the applicable value specified (see 3.1) from the step 1

measured value.

(2) Dissipation factor: Shall not exceed the applicable value specified (see 3.1).

c. Step 3 (+25�C):

(1) DC leakage: Shall not exceed the applicable value specified (see 3.1).

(2) Capacitance: Shall not change more than 10 percent from the step 1 measured value.

(3) Dissipation factor: Shall not exceed the requirement specified in 3.9.