Type 1 service-entrance SPD
Leviton P2120-B
A current Type 1 SPD listed to UL 1449 5th Edition, with an audible alarm, phase-loss monitoring and dry contacts.
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Best for
Service-entrance installs and meter-adjacent mounting
Specifications
| SPD Type | Type 1 (UL 1449 5th Ed. 2021) |
|---|---|
| Surge capacity | 50 kA per phase |
| Nominal discharge (In) | 20 kA |
| VPR | 700 V L-N / 1200 V L-G / 600 V N-G / 1200 V L-L |
| SCCR | 200 kA |
| Enclosure | NEMA 4X polycarbonate |
| Indicators | Status LEDs + audible alarm + Form C contacts |
| Warranty | 5-year limited |
Specifications as published by Leviton. Confirm against the current spec sheet before buying — manufacturers revise models without renaming them.
What's good
- True Type 1 listing for line-side-of-the-disconnect installation
- Audible alarm plus dry contacts you can wire to an alert
- 200 kA SCCR and current 5th-edition UL listing
What's not
- 50 kA headline capacity is the smallest of the whole-house group
- Connected-equipment coverage not published for the P Series
Our verdict
This replaces Leviton's discontinued 51120-1 — and unlike that 3 kA In model, the P2120-B clears the current code bar with room to spare. It's the pick when the install point is the service entrance rather than beside the panel.
Compare with the alternatives
- Siemens BoltShield FSPD140 — the default whole-house pick on any brand of panel
- Eaton CHSPT2ULTRA — a lifetime-warranty alternative at the top of the market
- Square D HEPD80 — the proven value pick, especially on square d panels
- Intermatic AG3000 — adding a protection layer at the ac condenser or heat pump
- Tripp Lite by Eaton ISOBAR6ULTRA — the point-of-use layer at your electronics