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Power Integrations CAP014DG is a two-terminal automatic X-capacitor discharge IC in a green SO-8 package. It blocks the discharge-resistor current while AC is present and reconnects the resistor path after AC removal.
The exact CAP014DG option, selection values, pinout, and package are documented in the Power Integrations CAPZero family data sheet, Rev. H (March 2018). Final equipment-level safety and surge performance require validation.
CAP014DG is the 1000 V breakdown-voltage option in the CAPZero family for an X-capacitor selection of up to 1 microfarad with a nominal total series discharge resistance of 780 kilohms. It is intended for AC-input EMI filters that need an X-capacitor discharge path without continuous loss through the discharge resistors while the line is connected.
The IC interrupts the continuous current path through the external X-capacitor discharge resistors while AC is applied.
After AC is disconnected, the device reconnects the series resistor path so the X capacitor can discharge.
The CAP014 variant belongs to the family's 1000 V breakdown-voltage group; actual surge suitability depends on the circuit.
The functional circuit has D1 and D2 terminals and does not require an external bias supply.
CAP014DG is paired with up to 1 microfarad of total X capacitance and 780 kilohms nominal total series resistance in the data-sheet selection table.
D1 and D2 connect across the controlled discharge-resistor network; no logic interface or programming is required.
The data sheet specifies 22 ms typical and 31.4 ms maximum detection time for 47 to 63 Hz line frequency.
The ordering code denotes the plastic SO-8 D package and the G green, halogen-free and RoHS-compliant material option.
CAP014DG uses the Power Integrations D package, a plastic SO-8 body. The data-sheet outline gives a nominal 3.90 mm body width and a 1.27 mm lead pitch. The catalog's normalized package name is 8-SOIC.

The package image is illustrative; it is not a substitute for the controlled mechanical drawing or equipment safety review.
The manufacturer's SO-8 pin configuration uses duplicate connections for each active terminal to support the specified spacing.
First drain terminal of the two-terminal discharge-control circuit.
Second drain terminal of the discharge-control circuit.
No internal electrical connection; follow the data-sheet PCB-coupling recommendation for pins 1-4 and 5-8.
Confirm pin numbering and copper connections against the current manufacturer pinout before fabrication.
| Function | Automatic X-capacitor discharge control |
|---|---|
| Exact ordering model | CAP014DG |
| Breakdown-voltage group | 1000 V |
| Maximum total X capacitance in selection table | 1 microfarad |
| Nominal total series resistance, R1 + R2 | 780 kilohms |
| AC-removal detection, 47-63 Hz | 22 ms typical; 31.4 ms maximum |
| Drain saturation current, CAP004/014 group | 0.48 mA typical under data-sheet conditions |
| Peak drain current, absolute maximum | 1.026 mA with drain voltage below 400 V |
| Operating ambient temperature | -10 to +105 degrees C |
| Package | Plastic SO-8 D package; 3.90 mm nominal body width |
| Package material code | G green, halogen-free and RoHS-compliant option |
Selection-table resistor and capacitance values are nominal design points, not interchangeable device ratings. Absolute-maximum ratings do not imply continuous-operation limits.
CAP004DG shares the 1-microfarad and 780-kilohm selection row but belongs to the 825 V breakdown-voltage group. It is only a conditional engineering candidate: recheck MOV placement, differential surge requirements, worst-case terminal voltage, package, and approvals before considering it. Other CAPZero ordering options use different X-capacitor and resistor selection rows and are not automatic substitutes. Newer CAPZero generations require their own schematic, pinout, and safety review.
Power Integrations documents CAP014DG in its CAPZero family data sheet, Rev. H. The family is designed to reduce standby dissipation associated with X-capacitor safety-discharge resistors in AC-input power converters. Confirm the document revision and lifecycle status during sourcing and design release.
Supports X-capacitor discharge while avoiding a permanent resistor-loss path during normal AC operation.
Helps designers budget no-load power while retaining a controlled discharge path.
Can be evaluated where the final equipment needs X-capacitor discharge and regulatory validation.
Check the full CAP014DG marking, SO-8 package, traceability, and purchase documentation against the manufacturer's controlled information. Verify material declarations and qualification records for the exact shipment as needed; this page does not certify an individual lot.
No. It controls current through an external R1/R2 resistor path; use the manufacturer's 780-kilohm nominal total for the CAP014 selection row.
Do not assume so. Their selection row is shared, but the breakdown-voltage groups differ: 1000 V for CAP014 and 825 V for CAP004.
No. Use the current SO-8 D-package mechanical drawing and verify land pattern and safety spacing for the actual board.
This summary supports preliminary selection, not equipment certification. Validate X-capacitor discharge time, resistor ratings under fault conditions, surge margin, creepage, clearance, thermal behavior, and applicable safety standards in the complete system. Use the latest manufacturer data sheet as the final technical authority.
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