CL21X 105J450V Metalized Polyester Film Capacitor for Power Supply Unit
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CL21X 1µF 450V Metalized Polyester Film Capacitor for ASIC PSU
The CL21X 105J/450V is a 1 µF (105 = 10 × 10⁵ pF) / 450 V metalized polyester film capacitor used in ASIC miner power supplies for blocking, bypassing, coupling and EMI-filter duty. Non-inductive metallized polyester film construction with flame-retardant epoxy resin encapsulation delivers compact, safe, durable operation in the high-voltage primary side of mining PSUs.
The cap's self-healing properties recover from minor dielectric breakdown events — extending service life under the high-voltage transient environment of ASIC PSUs. Wide operating voltage and good temperature tolerance make it the standard pick for switching power supplies, inverters and a range of high-frequency repair applications.
Typical Use Cases
- PSU primary-side filter — bulk filtering on the mains-rectified DC bus.
- EMI / RFI suppression — coupling / bypass duty on switching converters.
- Snubber circuits — across primary-side transistors in PSU half-bridge.
- Production refurbishment — bulk inventory for PSU rebuild lines.
CL21X Specifications
| Feature | Description |
|---|---|
| Part Number | CL21X 105J/450V |
| Type | Metalized polyester film capacitor (MKT) |
| Capacitance | 1 µF (105 code) |
| Voltage Rating | 450 V DC |
| Tolerance | ±5% (J code) |
| Construction | Non-inductive metallized polyester film |
| Self-Healing | Yes — recovers from minor dielectric events |
| Encapsulation | Flame-retardant epoxy resin |
| Operating Temperature | -40 °C to +85 °C |
| Storage Temperature | +15 °C to +35 °C |
| Use Cases | Blocking / bypass / coupling / EMI filter |
| Condition | Brand New |
FAQ — CL21X 105J/450V Film Capacitor
Q: Polyester vs polypropylene film?
A: Polyester (PET, CL21) handles general-purpose blocking / coupling / filter duty up to ~450 V at moderate ripple. Polypropylene (CBB / CL22) handles higher-ripple / pulse / snubber duty. Match to the original part marking.
Q: 105J code — what does it mean?
A: 10 × 10⁵ pF = 1,000,000 pF = 1 µF; J = ±5 % tolerance. The /450V suffix is the working voltage rating.
Q: Bulk pricing?
A: Yes — email contact@lys-sz.com.
Related products
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- CS472M Ceramic Capacitor – PSU Maintenance
ASIC PSU rebuild shops stocking CL21X 105J? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouses.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
