Polyester film capacitors — 100 V and 630 V ratings, capacitance from 100 nF (0.1 µF) up to common codes 104J, 103J, 222, 223J, 472 and 473J. J indicates ±5% tolerance. Designed for reliable, repeatable performance in a wide range of circuits. Key benefits — why you need these capacitors Stable polyester film dielectric: provides consistent capacitance across temperature and time, reducing drift in timing and filtering circuits. Wide voltage options (100 V and 630 V): choose the rating that matches circuit stress to improve safety and longevity. Compact, board-friendly packages: fit many PCB layouts without compromising performance. Clear standard markings (104J, 103J, 222, 223J, 472, 473J): quick, unambiguous identification speeds assembly and reduces sourcing errors. Precise tolerance (J = ±5%): tighter control of capacitance for timing, filter, and coupling applications. Key attributes Function: general-purpose film capacitor for filtering, decoupling, coupling, timing, and snubber use. Material: polyester (PET) film dielectric for stable electrical performance. Capacitance range: from 100 nF (0.1 µF) through values represented by codes 104J, 103J, 222, 223J, 472, 473J. Voltage ratings: available in 100 V and 630 V. Tolerance marking: J = ±5%. Size/compatibility: compact form factor suitable for many PCB layouts and space-constrained designs. Performance and verification Use a capacitance meter to verify parts during production, repair, or inspection. Example: a 0.01 µF (103J) capacitor rated 630 V can be measured to confirm the capacitance and ensure correct part installation. Polyester film construction delivers low leakage and stable behavior under typical operating conditions. Practical applications (real-world scenarios) Power-supply filtering and decoupling: smooth DC rails and suppress noise on regulator outputs in industrial or consumer power supplies. Audio and signal circuits: AC coupling and timing elements in audio preamps, sensor conditioning, and microcontroller I/O circuits where stable capacitance and low distortion matter. Switching and motor drives: snubber networks to damp inductive voltage spikes in relay, MOSFET, and motor-driver circuits, protecting semiconductors and reducing EMI. How to choose and use Match the voltage rating to the maximum circuit stress; choose 630 V for high-voltage or inductive spike environments, 100 V for low-voltage electronics. Select the capacitance code (104J, 103J, 222, 223J, 472, 473J) that meets the timing, coupling, or filter requirements; J indicates ±5% tolerance. Verify installed parts with a capacitance meter during assembly or maintenance to confirm values and catch mislabeling. Consider required temperature and space constraints — polyester film is stable and compact but confirm physical fit for your PCB. Ordering and identification Standard printed codes make it simple to confirm capacitance and tolerance at a glance. If you require assistance matching a code to a specific capacitance or application recommendation, measure the part with a capacitance meter or consult the marking code list before assembly. Reliable, easy-to-identify polyester film capacitors for board-level filtering, coupling, timing, and snubber needs — available in 100 V and 630 V ratings with common codes 104J, 103J, 222, 223J, 472 and 473J (J = ±5%).