Milbank Type 3R Hot Tub Discon...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$715.83
Milbank Hot Tub Disconnects Type 3R Unmetered Small Closing Plate Surface Mount Breaker

Milbank Type 3R Hot Tub Disconnect Enclosure 2-Pole Surface Mount with Hasp and Latch

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Model: U4881-O-50GB

In Stock (leaves warehouse same day if ordered before 3pm ET)

$715.83
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Milbank Type 3R Hot Tub Disconnect Enclosure 2-Pole Surface Mount with Hasp and Latch

Professional weatherproof disconnect solution for spa and hot tub applications

The Milbank Type 3R Hot Tub Disconnect Enclosure delivers reliable outdoor electrical protection with professional-grade welded construction and NEMA Type 3R rating. This 2-pole surface mount spa box features ANSI 61 Gray finish and hasp and latch locking mechanism for secure operation in residential and commercial hot tub installations.

Professional Features & Benefits

  • NEMA Type 3R Rating: Provides weatherproof protection against rain, sleet, and ice formation for reliable outdoor performance
  • 2-Pole Configuration: Accommodates standard hot tub electrical requirements with proper circuit isolation and safety
  • Welded Construction: Ensures structural integrity and long-term durability in outdoor environments
  • Hasp and Latch Locking: Delivers secure access control and prevents unauthorized operation or tampering
  • Surface Mount Design: Enables flexible installation on walls or structures with convenient access for connections
  • UL Listed: Meets rigorous safety standards for electrical enclosures ensuring code compliance and professional installation
  • Knockout Cable Entry: Provides versatile conduit connection options for various wiring configurations

Technical Specifications

  • Application: Circuit Breaker Enclosure
  • Brand Name: Milbank
  • Cable Entry: Knockouts
  • Construction: Welded
  • Departent: Electrical
  • Knockouts: TRUE
  • Locking Mechanism: Hasp and Latch
  • Nema Rating: Type 3R
  • Number Of Poles: 2
  • Product Color: ANSI 61 Gray
  • Product Family Code: ENCB
  • Product Height: 8.5 IN
  • Product Length: 3.75 IN
  • Product Mounting: Surface Mount
  • Product Type: Spa Box
  • Standard: UL Listed
  • Temperature Rating: No Temperature Rating
  • Unspsc Number: 39121318
  • Width: 7.5 IN

Professional Applications

  • Residential Hot Tub and Spa Installations
  • Commercial Pool and Spa Facilities
  • Resort and Hotel Pool Areas
  • Multi-Unit Residential Properties
  • Recreational Vehicle Parks
  • Fitness Centers and Health Clubs
  • Outdoor Entertainment Venues

Why Choose Milbank Quality?

Milbank delivers proven reliability through UL Listed certification and professional-grade welded construction. The NEMA Type 3R rating and ANSI 61 Gray finish provide long-lasting performance in demanding outdoor environments, making this disconnect enclosure the trusted choice for spa and hot tub electrical safety.

Manufacturer Resources

Product Specs

Application:
Circuit Breaker Enclosure
Brand Name:
Milbank
Cable Entry:
Knockouts
Construction:
Welded
Knockouts:
TRUE
Nema Rating:
Type 3R
Number Of Poles:
2
Product Family Code:
ENCB
Product Height:
8.5 IN
Product Length:
3.75 IN
Product Type:
Spa Box
Standards:
UL Listed
Temperature Rating:
No Temperature Rating
Unspsc Number:
39121318
Locking Mechanism:
Hasp and Latch
Product Color:
ANSI 61 Grey
Product Mounting:
Surface Mount
Product Width:
7.5 IN
Department:
Electrical
Product Subgroup:
Safety Switches & Disconnects
Installation Category:
Surface Mount
Product Details:
Spa Box
Product Group:
Power Distribution

Milbank U4881-O-50GB – Frequently Asked Questions

1) Will a Milbank U4881-O spa disconnect hold up outdoors next to the hot tub, or does it need to be under cover?
It's built for open outdoor mounting. The U4881-O carries a NEMA Type 3R rating, which is the outdoor rating for rain, sleet and ice, and the body is welded rather than screwed together. ANSI 61 grey finish. Mount it on the wall of the house, a post, or the equipment pad structure with no roof or soffit needed over it.
2) Do I order the 50 amp or the 60 amp Milbank hot tub disconnect?
The U4881-O comes two ways: U4881-O-50GB at 50 amps and U4881-O-60GB at 60 amps. Match it to the nameplate on the spa pack, not to the wire you happen to have. Most single-pump 240V tubs land on 50A; a bigger unit with a second pump or a larger heater usually calls for 60A. The tub manufacturer's data plate states the maximum overcurrent protection, and that number is the one to buy.
3) Does the Milbank spa disconnect enclosure come with the breaker in it?
No. The U4881-O is a circuit breaker enclosure, so the GFCI breaker is a separate buy. The amperage on the box (50 or 60) tells you what the enclosure is set up for, and NEC requires the spa's disconnect circuit to be GFCI protected, so plan on a 2-pole GFCI breaker at the matching rating.
4) Is a 2-pole spa disconnect enough for a 240 volt hot tub?
For a straight 240V tub with no separate 120V circuit, yes. Two poles gives you both ungrounded conductors on a single 2-pole GFCI breaker, which is what a 240V spa pack needs. If your installation feeds the tub plus a separate 120V circuit for a light or a blower on its own breaker, you need more than two spaces and this is the wrong box.
5) How big is the Milbank U4881-O spa panel, and how much wall does it need?
It measures 8.5 x 7.5 x 3.75 inches. That is a small footprint for a spa disconnect, so it fits on a narrow pilaster, a post, or the strip of siding between the tub and a window where a full-size load center will not go. Surface mount, so nothing has to be cut into the wall.
6) Can the Milbank U4881-O hot tub disconnect be padlocked?
Yes, it has a hasp and latch. Put a padlock through the hasp and the disconnect can be locked out for service, which is what a tech wants before opening the spa pack, and what a property manager wants at a pool deck or an RV park where the box is in reach of the public.
7) Is the Milbank spa disconnect UL Listed for a permitted commercial pool job?
UL Listed, and the Type 3R rating is the piece an inspector looks for on an outdoor spa disconnect. That combination is what gets it accepted at hotel and resort pool decks, fitness club spas and multi-family common-area tubs, not just residential backyards.
8) Is the Milbank U4881-O a metered pedestal or just a disconnect?
Just the disconnect. It's an unmetered surface-mount enclosure, no meter socket and no pedestal, so it goes on an existing wall or structure downstream of the service. If the spa is out at a pad with no building near it, you need a pedestal-style unit instead.
9) How does conduit land in the Milbank spa box, is it pre-drilled or do I punch it?
Cable entry is by knockouts, so the openings are already scored in the enclosure and you knock out only the ones you use. Nothing is left open when you're done. That works for either the feed in from the panel or the run out to the tub, in whatever combination the layout needs.
10) Can I use this Milbank enclosure as a general outdoor breaker box, not just for a hot tub?
It works anywhere you need a small weatherproof 2-pole breaker enclosure outdoors, a well pump, an AC condenser feed, a small outbuilding disconnect. It's a circuit breaker enclosure with a Type 3R rating and two pole spaces; the spa-box label is about the usual application, not a limit built into the box.
How fast can I get the Milbank U4881-O-50GB delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Milbank U4881-O-50GB come with a warranty?
Absolutely. The Milbank U4881-O-50GB is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Milbank U4881-O-50GB?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Milbank U4881-O-50GB from ZenSupply?
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