Contact
North America 732 542-7880
Europe 353(91)552432

ST12 Series - Polystyrene

Type ST12 Polystyrene capacitors excel in performance characteristics such as capacitance stability, linear negative temperature coefficient, low dielectric absorption, low dissipation factor and high insulation resistance.

Key Features

  • Capacitance stability
  • Linear negative temperature coefficient
  • Low dielectric absorption
  • Low dissipation factor
  • High insulation resistance

Home > Film Capacitors > ST12 Series

Used in Precision Timing Circuits, Wave Filters, Integrating Circuits & Other Critical Circuitry

These outstanding performance characteristics allow the ST12 capacitors to be used in precision timing circuits, wave filters, integrating circuits and other critical circuitry.

The type ST12 capacitor is offered in a “wrap and fill” configuration. The outer wrap is an electrical grade of Mylar film adhesive tape. The end fill is an epoxy resin specially formulated to bond with the Mylar film outer wrap forming a moisture resistant seal.

 

Additional Information

Capacitance Range

  • 0.001µF to 1.8µF

Capacitance Tolerance

  • K=±10%, J=±5%, G=±2%, F=±1%

Operating Temperature Range

  • -55°C to +85°C

Enclosure/ Construction

  • Extended foil (non-inductive)

Voltage Rating

  • 50VDC to 400VDC

Quality Control

  • Capacitors are tested 100% for:
    • Capacitance tolerance
    • Dissipation Factor
    • Dielectric withstanding voltage
    • Insulation Resistance
    • Equivalent Series Resistance (ESR)

*Process and inspection data are maintained on file and available on special request.

Environmental

Parameter Method Condition
Vibration 204 D
Shock 213 I
Humidity 106 –
Thermal Shock 107 A
Life 108 F
Reference MIL-STD 202
EC PART NUMBER MFD 50 VDC 100 VDC 200 VDC 400 VDC
B D F J
D L AWG D L AWG D L AWG D L AWG
ST12_102_ 0.0010 0.187 0.500 24 0.187 0.500 24 0.187 0.500 24 0.205 0.500 24
ST12_122_ 0.0012 0.187 0.500 24 0.187 0.500 24 0.187 0.500 24 0.222 0.500 24
ST12_152_ 0.0015 0.187 0.500 24 0.187 0.500 24 0.187 0.500 24 0.245 0.500 24
ST12_182_ 0.0018 0.187 0.500 24 0.187 0.500 24 0.187 0.500 24 0.266 0.500 22
ST12_222_ 0.0022 0.187 0.500 24 0.187 0.500 24 0.187 0.500 24 0.292 0.500 22
ST12_272_ 0.0027 0.187 0.500 24 0.187 0.500 24 0.187 0.500 24 0.321 0.500 22
ST12_332_ 0.0033 0.187 0.500 24 0.187 0.500 24 0.187 0.500 24 0.352 0.500 22
ST12_392_ 0.0039 0.187 0.500 24 0.187 0.500 24 0.191 0.500 24 0.275 0.625 22
ST12_472_ 0.0047 0.187 0.500 24 0.187 0.500 24 0.207 0.500 24 0.299 0.625 22
ST12_562_ 0.0056 0.187 0.500 24 0.187 0.500 24 0.223 0.500 24 0.325 0.625 22
ST12_682_ 0.0068 0.187 0.500 24 0.206 0.500 24 0.224 0.500 24 0.258 0.750 22
ST12_822_ 0.0082 0.195 0.500 24 0.224 0.500 24 0.221 0.625 24 0.281 0.750 22
ST12_103_ 0.0100 0.212 0.500 24 0.244 0.500 24 0.242 0.625 24 0.308 0.750 22
ST12_123_ 0.0120 0.220 0.500 24 0.265 0.500 22 0.209 0.750 24 0.335 0.750 22
ST12_153_ 0.0150 0.252 0.500 22 0.293 0.500 22 0.231 0.750 24 0.373 0.750 22
ST12_183_ 0.0180 0.278 0.500 22 0.266 0.625 22 0.250 0.750 24 0.335 0.875 22
ST12_223_ 0.0220 0.252 0.625 22 0.291 0.625 22 0.274 0.750 22 0.369 0.875 22
ST12_273_ 0.0270 0.276 0.625 22 0.320 0.625 22 0.301 0.750 22 0.406 0.875 22
ST12_333_ 0.0330 0.303 0.625 22 0.352 0.625 22 0.330 0.750 22 0.448 0.875 22
ST12_393_ 0.0390 0.326 0.625 22 0.380 0.625 22 0.356 0.750 22 0.485 0.875 20
ST12_473_ 0.0470 0.357 0.625 22 0.326 0.750 22 0.333 0.875 22 0.461 1.000 20
ST12_563_ 0.0560 0.388 0.625 22 0.355 0.750 22 0.361 0.875 22 0.503 1.000 20
ST12_683_ 0.0680 0.344 0.750 22 0.331 0.875 22 0.395 0.875 22 0.496 1.250 20
ST12_823_ 0.0820 0.366 0.750 22 0.361 0.875 22 0.384 1.000 22 0.542 1.250 20
ST12_104_ 0.1000 0.402 0.750 22 0.398 0.875 22 0.412 1.000 22 0.596 1.250 20
ST12_124_ 0.1200 0.438 0.750 22 0.434 0.875 22 0.460 1.000 20 0.652 1.250 20
ST12_154_ 0.1500 0.414 0.875 22 0.428 1.000 22 0.465 1.250 20 0.665 1.500 20
ST12_184_ 0.1800 0.453 0.875 20 0.466 1.000 20 0.508 1.250 20 0.728 1.500 20
ST12_224_ 0.2200 0.498 0.875 20 0.466 1.250 20 0.560 1.250 20 0.803 1.500 20
ST12_274_ 0.2700 0.488 1.000 20 0.516 1.250 20 0.619 1.250 20 0.887 1.500 20
ST12_334_ 0.3300 0.537 1.000 20 0.568 1.250 20 0.683 1.250 20 0.980 1.500 20
ST12_394_ 0.3900 0.528 1.250 20 0.616 1.250 20 0.683 1.500 20 - - -
ST12_474_ 0.4700 0.578 1.250 20 0.675 1.250 20 0.749 1.500 20 - - -
ST12_564_ 0.5600 0.630 1.250 20 0.675 1.500 20 0.815 1.500 20 - - -
ST12_684_ 0.6800 0.693 1.250 20 0.745 1.500 20 - - - - - -
ST12_824_ 0.8200 0.700 1.500 20 0.816 1.500 20 - - - - - -
ST12_105_ 1.0000 0.770 1.500 20 0.900 1.500 20 - - - - - -
ST12_125_ 1.2000 0.844 1.500 20 - - - - - - - - -
ST12_155_ 1.5000 0.940 1.500 20 - - - - - - - - -
ST12_185_ 1.8000 1.050 1.500 20 - - - - - - - - -
Note: The fifth character of the part number represents the DC voltage (i.e. B=50 VDC, D=100 VDC, etc.).  Additionally, the tenth character of the part number represents the capacitance tolerance: K=±10%, J=±5%, G=±2%, F=±1%.


ST12chart

Insulation Resistance

Temperature (°C) 25 85
Megaohms x Microfarads 500,000 50,000
Insulation Resistance

 

ST12ins

 

Dielectric Strength

Capacitors will withstand a DC potential of 200% rated voltage for two (2) minutes without damage or breakdown. Test voltage is applied and discharged through a resistance of 1 OHM per volt minimum, and at 25°C.

 

Capacitance Change

Temperature (°C) -55 25 85
Percentage Change (typical) 1.0 0 -0.6
Capacitance Change

 

 

ST12cap

 

Dissipation Factor

When measured at the frequency specified for capacitance measurements the dissipation factor will not exceed 0.05%.

 

ST12dis

  • Wrap and Fill Axial Leads
Back to Top ^
Terms & Conditions | Disclaimer | Privacy Policy
© 2026 Electronic Concepts, Inc.
All rights reserved. | Linecard

Electronic Concepts, Inc. 526 Industrial Way W. | Eatontown, New Jersey 07724 Tel: 732 542-7880

Electronic Concepts, Ltd. Oughterard | Co. Galway, H91 Y896 Ireland Tel: 353(91)552432, 552385