High Reliability "SR" Capacitors
(Tested similarly to MIL-PRF-123 Group A)
For applications that require the highest level of reliability, Presidio recommends its high reliability
“SR” capacitors. Tested similarly to MIL-PRF-123 Group A, Presidio manufacturers these chips on
the same manufacturing line as its military product line. They may be used in both military and
space applications. Please note these capacitors are NOT MIL-qualified.
Quality Assurance Provisions
Every lot undergoes the following inspection and tests:
•
Destructive Physical Analysis (DPA): A representative sample is pulled from each lot and
examined per relevant sections of EIA 469 and to verify adherence to Presidio’s internal
design criteria. Sample size is per MIL-PRF-123.
•
Ultrasonic Scanning (optional): This screening may be performed on lots to assure the
highest quality microstructure. Ultrasonic scanning is not required for each lot, and must be
specified on the customer purchase order.
•
Thermal Shock: All parts are temperature cycled for 20 cycles in accordance with MIL-PRF123.
•
Voltage Conditioning: All parts receive a voltage conditioning at 2X rated voltage and
125°C for a minimum of 168 hours and a maximum of 264 hours. Voltage conditioning may
be terminated at any time between 168 and 264 hour time intervals when failures are less
than .1% or 1 piece, during the last 48 hours of the test. Tested in accordance with MIL-PRF123 except resistors are used in place of fuses.
•
Insulation Resistance (IR @ 125°C): All parts are tested at 125°C and rated voltage in
accordance with Method 302 of MIL-STD-202. The minimum IR required is 10,000 megohms
or 100 megohm-microfarads.
•
Dielectric Withstanding Voltage (DWV): All parts are tested at 2.5X rated voltage in
accordance with Method 301 of MIL-STD-202, or according to EIA/MIL Standards.
•
Insulation Resistance (IR @ 25°C): All parts are tested at 25°C and rated voltage in
accordance with Method 302 of MIL-STD-202. The minimum IR required is 100,000
megohms or 1,000 megohm-microfarads.
•
Capacitance: All parts are tested at 25°C and 1VACRMS in accordance with Method 305 of
MIL-STD-202.
•
Dissipation Factor (DF):
Voltage Rating
NPO
16 / 25
.15%
≥ 50
.15%
BX
2.5%
2.5%
X7R
3.5%
2.5%
•
Percent Defective Allowed (PDA): The cumulative PDA after voltage conditioning is 5%.
Pieces rejected as out of tolerance for capacitance or visual screening will be removed from
the lot but not counted in the PDA calculation.
•
Visual: Performed on pieces in accordance with MIL-PRF-123 Appendix B.
•
Mechanical: Level 1 AQL 1% in accordance with MIL-PRF-123.
•
Class K Element Evaluation (optional): A MIL-PRF-38534 Appendix C Passive Element
Class K element evaluation is available when the customer requires this testing. Element
evaluation is not required on each lot, and must be specified on the purchase order.
•
Operating Temperature Range: -55°C to +125°C
7169 Construction Court, San Diego, CA 92121 USA • Tel: 858-578-9390 • Fax: 800-538-3880 or 858-578-6225
Web: www.presidiocomponents.com • Email: info@presidiocomponents.com
