How SMD Electrolytic Capacitors Enhance Power Supply Stability
Switching power supplies rely on stable output regulation. jb® SMD aluminum electrolytic capacitors are engineered to support low ESR, long-life performance, and compact PCB layout, helping designers enhance EMI robustness and reduce thermal stress across consumer, industrial, and telecom platforms.
Verify all parameters with the official datasheet during qualification.
How Low ESR Strengthens Power Integrity
Lower ESR reduces AC losses and temperature rise, improving efficiency and transient behavior.
- Lower output ripple
- Higher converter efficiency
- Cleaner undershoot/overshoot
- Improved reliability under switching stress
ESR_max ≈ ΔV_ripple / I_ripple
Comprehensive Series Portfolio
Impedance profiles and endurance tailored for common SMPS scenarios.
| Series | Temp | Load Life | ESR / Impedance | Primary Applications |
|---|---|---|---|---|
| JCS | 85°C | 2000h | Standard | Home appliances, set-top boxes, low-cost SMPS |
| JCK | 105°C | 1000–2000h | Low ESR | General DC/DC, chargers, TV power boards |
| JCD | 105°C | 2000h | Low impedance | Telecom infrastructure, PoE, networking |
| JCF | 105°C | 2000–5000h | Ultra-low impedance | LED drivers, industrial SMPS, metering |
Layout and Reliability Notes
- Place near switching MOSFET/inductor to minimize loop area
- Parallel with MLCCs for HF bypass and anti-resonance
- Parallel capacitors share ripple current and reduce ESR
- Thermal headroom dominates lifetime more than nameplate ripple
- Follow lead-free reflow profile; avoid excessive double reflow
For ambient above 60°C, consider 20% voltage derating.
Cross-Reference
| jb Series | Equivalent Categories |
|---|---|
| JCS | NCC MVA, Nichicon UWX, Rubycon SEV, Panasonic EEE-x(A)S |
| JCK | NCC MVE, Nichicon UWT, Rubycon SKV, Panasonic EEEHA |
| JCD | NCC MHJ, Panasonic EEE-Tx, low-Z telecom families |
| JCF | High-ripple industrial types from leading brands |
