# Z21D391 Semitec USA Corp | Circuit Protection | DigiKey

**Manufacturer:** Semitec USA Corp  
**MPN:** `Z21D391`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Semitec USA Corp |
| Manufacturer name | Semitec USA Corp |
| Manufacturer | Semitec USA Corp |
| Extra Product Name | Z21D391 Semitec USA Corp \| Circuit Protection \| DigiKey |
| atoms | 1 |
| extraShipping | 0 |
| moq | 1 |
| MPN | Z21D391 |
| multiple | 1 |
| packaging | Bulk |
| qtyInStock | 0 |
| SKU | 16579024 |
| snippet | 390 V 10 kA Varistor 1 Circuit Through Hole Disc 20mm |
| tierMinQty1 | 1 |
| tierMinQty2 | 10 |
| tierMinQty3 | 25 |
| tierMinQty4 | 100 |
| tierMinQty5 | 250 |
| tierMinQty6 | 500 |
| tierMinQty7 | 1,000 |
| tierMinQty8 | 2,500 |
| tierMinQty9 | 5,000 |
| tierPrice1 | 1.49000 |
| tierPrice2 | 1.32200 |
| tierPrice3 | 1.19440 |
| tierPrice4 | 1.04500 |
| tierPrice5 | 0.91704 |
| tierPrice6 | 0.81040 |
| tierPrice7 | 0.63978 |
| tierPrice8 | 0.59713 |
| tierPrice9 | 0.56728 |
| Category | Circuit Protection |
| Mfr | Semitec USA Corp |
| Series | Z21D |
| Package | Bulk |
| Product Status | Active |
| Maximum AC Volts | 250 V |
| Maximum DC Volts | 320 V |
| Varistor Voltage (Min) | 351 V |
| Varistor Voltage (Typ) | 390 V |
| Varistor Voltage (Max) | 429 V |
| Current - Surge | 10 kA |
| Energy | 275J |
| Number of Circuits | 1 |
| Capacitance @ Frequency | 1100 pF @ 1 kHz |
| Operating Temperature | -40?C ~ 85?C (TA) |
| Features | - |
| Mounting Type | Through Hole |
| Package / Case | Disc 20mm |
| Base Product Number | Z21D |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Digi-Key | 16579024 | 1.49 | 1 | None | 1 |

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Structured data: `/python/html6/product/500/235500000/235755000/part_--Z21D391---SemitecUSACorp--a6ac820bde.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp