Call:+86 13689553728 Email:sales@hv-caps.com
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High Voltage Ceramic Capacitor Expert
What is the step-by-step process for validating a replacement capacitor in an existing design?
HVC Capacitor recommends a structured 7-phase validation protocol when migrating from a legacy brand (Vishay, TDK, Murata, etc.) to HVC components — ensuring electrical compatibility, mechanical fitment, and long-term reliability before committing to production volume orders.
Phase 1: Specification Cross-Reference (Days 1-3)
| Action | Tool/Method | Acceptance Criteria |
|--------|------------|--------------------|
| Obtain original datasheet | Request from OEM or distributor | Full parametric sheet available |
| Identify critical parameters | Highlight VRRM, C, DF, TCR, dimensions | Top 10 parameters listed |
| Match to HVC equivalent | Use HVC cross-reference table or contact sales | ≥90% parameter match achieved |
| Flag any gaps | Document deviations with engineering notes | All gaps identified and assessed |
Phase 2: Sample Procurement & Visual Inspection (Week 1-2)
| Action | Details |
|--------|---------|
| Request evaluation samples | 3-5 pieces recommended minimum |
| Dimensional verification | Measure all critical dimensions against drawing |
| Terminal/pin inspection | Verify thread standard, pitch, torque spec |
| Marking & identification | Confirm part number, date code legibility |
| Packaging quality check | Anti-static, moisture barrier if applicable |
Phase 3: Electrical Bench Testing (Week 2-4)
| Test | Equipment | Condition | Pass Criteria |
|------|-----------|-----------|---------------|
| Capacitance measurement | LCR meter @ 1kHz/1Vrms | 25°C | Within ±10% of nominal |
| Dissipation factor (DF/tanδ) | LCR meter | 25°C, rated V | ≤ specified max |
| Insulation resistance (IR) | Megohmmeter | Rated VDC, 60s | ≥ specified min (typically >10GΩ) |
| Withstand voltage test | Hipot tester | 1.5 × VRRM, 60s | No breakdown, no flashover |
| Temperature coefficient | Temp chamber + LCR | -55°C ~ +125°C | Within ±Tolerance band |
Phase 4: In-Circuit Functional Test (Week 3-5)
* Install sample in actual circuit board (or representative test fixture)
* Operate at nominal conditions for minimum 24 hours continuous
* Monitor: output waveform, efficiency, temperature rise at key points
* Compare baseline measurements against legacy component performance
Phase 5: Environmental Stress Testing (Week 4-8)
| Stress Type | Condition | Duration | Standard Reference |
|-------------|-----------|----------|--------------------|
| Temperature cycling | -40°C ↔ +125°C | 100 cycles | IEC 60068-2-14 |
| Damp heat bias | 85°C / 85% RH @ rated V | 500 hours | IEC 60068-2-78 |
| Mechanical vibration | 10-2000Hz, 1.52g rms | 12hr/axis × 3 axes | IEC 60068-2-6 |
| Thermal shock | Liquid-to-liquid -40°C ↔ +125°C | 15 cycles | IEC 60068-2-14 |
Phase 6: Extended Reliability Run-In (Week 6-12)
* Operate assembled unit under accelerated stress (elevated temperature, maximum rated current/voltage)
* Minimum 500-hour run-in recommended for safety-critical applications
* Periodic re-measurement of C, DF, IR at 100hr intervals
* Failure analysis on any drift exceeding pre-defined thresholds
Phase 7: Production Qualification Report & Approval (Week 12+)
Compile complete documentation package:
* Test report summary with all measured data
* Deviation assessment and risk mitigation plan
* Engineering sign-off from relevant stakeholders
* Formal PPAP (Production Part Approval Process) submission if required by customer quality system
Contact: Sales Department
Phone: +86 13689553728
Tel: +86-755-61167757
Email: sales@hv-caps.com
Add: 9B2, TianXiang Building, Tianan Cyber Park , Futian, Shenzhen, P. R. C
