Type 1 whole-house SPD
Square D HEPD80
The ubiquitous compact SPD — Type 1 rated, 80 kA per phase, and the one your electrician has probably installed fifty times.
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Best for
The proven value pick, especially on Square D panels
Specifications
| SPD Type | Type 1 (UL 1449 4th Ed.) |
|---|---|
| Surge capacity | 80 kA per phase |
| Nominal discharge (In) | 10 kA |
| VPR | 600 V L-N / 600 V L-G / 900 V N-G / 1000 V L-L |
| SCCR | 25 kA |
| Enclosure | NEMA 4X non-metallic |
| Indicators | Single green LED |
| Warranty | 5 years |
Specifications as published by Square D. Confirm against the current spec sheet before buying — manufacturers revise models without renaming them.
What's good
- Type 1 listing allows line-side installation, not just load-side
- 600 V let-through matches devices costing twice as much
- Small, familiar, and stocked everywhere electricians shop
What's not
- 10 kA In is the NEC dwelling minimum, not headroom above it
- One unlabeled LED and no alarm — easy to miss a failure
- Connected-equipment coverage not published; 5-year term trails the leaders
Our verdict
The HEPD80 survives on this page because it does the core job at the lowest installed cost, with a Type 1 listing the premium units lack. Pick it when budget rules or when it's going on a Square D panel anyway; pick the Siemens or Eaton when you want margin and indication.
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
- Leviton P2120-B — service-entrance installs and meter-adjacent mounting
- 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