NVD14UCD620 KOA Speer Varistor (Other) In Stock
KOA Speer NVD14UCD620 is a 14 mm disc metal-oxide varistor (MOV) with a 620 V varistor voltage rating for transient surge suppression in AC and DC circuits. It clamps voltage spikes rapidly to protect downstream components from ESD and lightning-induced surges. Available from stock with worldwide shipping.
- Manufacturer
- KOA Speer
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- NVD14UCD620 Datasheet PDF
- Category
- Varistor
- Price
- From $0.3200(MOQ 1500)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of NVD14UCD620?
- 620 V varistor voltage on a 14 mm disc body provides robust clamping for 480 V AC mains and industrial DC bus protection
- Metal-oxide disc construction offers fast sub-nanosecond response time to clamp transient voltage spikes from ESD and lightning surges
- 14 mm disc format allows direct through-hole mounting across line-to-neutral or line-to-ground positions in power entry modules
What is NVD14UCD620 used for?
NVD14UCD620 is used in AC power entry circuits, industrial motor-drive input stages, and HVAC control boards where 480 V AC mains surges and lightning-induced transients must be clamped to protect downstream electronics. Its 14 mm disc form factor fits standard through-hole footprints on surge-protection filter boards and power-line conditioning modules rated for up to 620 V peak.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the NVD14UCD620 datasheet?
NVD14UCD620 Datasheet DownloadOfficial datasheet from KOA Speer
What are equivalent replacements for NVD14UCD620?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
At what varistor voltage does NVD14UCD620 begin clamping transient surges on AC mains circuits?
NVD14UCD620 has a varistor voltage of 620 V, meaning it conducts and clamps transient overvoltages that exceed this threshold. For 480 V AC mains applications, this provides sufficient headroom above the 677 V peak of the nominal line voltage while still clamping dangerous lightning or switching surges within nanoseconds.
How does the 14 mm disc size of NVD14UCD620 compare to smaller MOV discs in energy handling?
Larger disc diameter directly increases the cross-sectional area of the metal-oxide material, raising peak surge current and energy absorption capacity. A 14 mm disc typically handles 50 J to 80 J of surge energy and peak currents above 4 500 A (8/20 µs pulse), compared to 7 mm discs that absorb only 10 J to 20 J, making it more appropriate for industrial and commercial power entry protection.
In which industrial or commercial applications is NVD14UCD620 specified instead of a transient voltage suppressor (TVS) diode?
MOV disc varistors like NVD14UCD620 are preferred over TVS diodes when the circuit voltage is 480 V AC or higher and surge energy exceeds 5 J, because a single TVS cannot absorb the multi-joule energy of a mains lightning surge. NVD14UCD620 suits three-phase industrial drives, HVAC compressor controllers, elevator control boards, and 600 V class power distribution panels where high-energy AC surge clamping at 620 V is required.
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Why Buy from FindMyChip
About KOA Speer
KOA Speer is a leading electronic component manufacturer. FindMyChip sources KOA Speer ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1500+ | $0.3610 | $541.50 |
| 3000+ | $0.3270 | $981.00 |
| 9000+ | $0.3200 | $2880.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
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