Polyester Capacitor 3.3uF 400V
The Polyester (metallized polypropylene film) capacitor 3.3 µF 400 V is a radial-lead, box-style film capacitor built for reliable DC and pulse applications. Its metallized polypropylene dielectric gives low loss and stable capacitance over a wide temperature range, while the plastic case and epoxy sealing provide mechanical protection and flame resistance for safer operation. The part in your PDF is designated KP335K2G2202 and is presented as a compact, through-hole film capacitor suitable for bench and production assembly.
Mechanically the component is sized for easy PCB mounting with 0.8 mm leads and a lead spacing designed for standard through-hole layouts. The construction uses copper-clad steel leads and UL V-0 rated epoxy/plastic materials, which together make handling and soldering straightforward while keeping the device robust against vibration and handling stresses. The datasheet emphasises controlled manufacturing and marking to ensure repeatable identification and placement.
Electrically the capacitor targets low dissipation and high insulation resistance so it behaves predictably in filtering, timing and DC-link roles. It’s specified to operate continuously between −40 °C and +100 °C and to pass endurance, damp-heat and vibration tests typical for metallized film components. The datasheet highlights recommended soldering and mounting practices to avoid heat or mechanical damage during assembly.
Features :
- Metallized polypropylene.
- Low high-frequency loss.
- Low internal temperature rise.
- Flame retardant epoxy powder encapsulation (UL94 V-0).
Specifications:
| Specification | Value |
|---|---|
| Part number (example on PDF): | KP335K2G2202 |
| Capacitance (nominal): | 3.3 µF |
| Rated voltage (R.V.): | 400 V DC |
| Dielectric / Type: | Metallized polypropylene film (MPP / CBB22 class) |
| Operating temperature: | −40 °C to +100 °C |
| Dissipation factor (DF): | ≤0.001 (0.1%) at 1 kHz (per spec sheet) |
| Insulation resistance (IR): | Specified per sheet: for C>0.33 µF use IR ≥ 5000 MΩ·µF (per formula in datasheet) |
| Soldering recommendation: | Hand solder: ≤ +260 °C, immersion 2 ±1 s (follow datasheet limits) |
| Typical dimensions (mm): | W = 24; H = 19.5; T = 11.5; Lead pitch P = 22.5; Lead dia φ = 0.8; Lead length L = 20 |
| Lead material: | Copper-clad steel, tinned |
| Series | Code | W ±1 (mm) | H ±1 (mm) | T ±1 (mm) | P±0.5 (mm) | d±0.05 (mm) | L MAX (mm) |
| CBB21 | 335K400V | 34 | 23 | 16 | 32 | 0.8 | 25 |
Pinout Diagram:
Footprint Diagram:
Applications:
- Power supply filtering.
- DC-link and energy storage in high-voltage circuits.
- Snubber and transient suppression networks.
- Timing and coupling in analog electronics.
Package Contents:
- 1x Polyester Capacitor 3.3uF 400V
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