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DiversiTech 30 amps Surge Disconnect Box

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Combines a manual equipment shutoff with surge protection to keep outdoor HVAC control boards safe from voltage spikes.
Diversitech MPN DDS-30-SURGE In Stock & Ready to Ship
$109.99
Free shipping on orders over $75
Ships within 24 hours · most orders arrive in about 2 business days

About Product Overview

This DiversiTech disconnect box does double duty: it gives you a manual shutoff for servicing outdoor equipment like AC condensers or heat pumps, and it builds in surge protection to guard that equipment's control board from voltage spikes. Rated for 30 amps at 120/240 volts, it's a hardwired install meant to sit outside near the unit it's protecting, and the enclosure is built to handle outdoor exposure.

It's a straightforward swap-in for anyone rewiring or upgrading a disconnect on HVAC equipment, and the surge circuit protection adds a layer of insurance that a standard disconnect box doesn't offer. Made in the USA, it ships bulk-packed, which keeps cost down for contractors ordering in volume.

  • Amperage: 30A
  • Voltage: 120/240V
  • Circuit Protection Type: Surge
  • Mounting Type: Hardwired
  • Rated for Outdoor Use
  • Dimensions: 5.63" W x 2.5" D x 10.25" H

The Details Specifications

Brand Diversitech
Model / MPN DDS-30-SURGE
UPC 095247203208
Weight 3 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

Go ahead. Check.

You're going to price-check us against Amazon, Home Depot, and Lowe's. Everybody does. Good — open all three tabs. We'll wait. Then look hard at what you're actually being handed over there.

On Amazon, start with these four questions before you click buy.

01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Diversitech. A third-party marketplace seller usually isn't.

03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

Who you call when it breaks

Ours is a phone number with a person behind it who has held this product. M–F, 6 AM – 5 PM Pacific. (866) 469-8556

The big boxes don't care if your hardware store survives.

Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.

Why we tell you to shop local
Authorized dealer · Diversitech

Or skip the tabs entirely and buy it down the street. Find a store near you →

Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

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