Littelfuse WPB1 Series In-Line...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$4.30
Littelfuse WPB1 Series In-Line Watertight Fuse Holder

Littelfuse WPB1 Series In-Line Watertight Fuse Holder

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Model: LITWPB1

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

$4.30
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Littelfuse WPB1 Series In-Line Watertight Fuse Holder

The Littelfuse WPB1 Series In-Line Watertight Fuse Holder is built to protect electrical circuits in environments where exposure to moisture is a real concern. As an in-line fuse holder, the WPB1 mounts directly into a circuit conductor run rather than requiring a separate panel or enclosure, giving electricians and technicians a compact, accessible point for fuse installation, inspection, and replacement. Its watertight housing design makes the WPB1 Series a practical choice for outdoor, wet-location, and other exposed electrical applications where a standard, unsealed fuse holder would be vulnerable to moisture ingress, corrosion, and eventual connection failure.

Key Features

  • In-Line Configuration: The WPB1 mounts directly in-line with circuit conductors, simplifying installation into an existing wiring run without the need for a separate enclosure or panel cutout.
  • Watertight Construction: A sealed housing design helps keep the fuse element and connection points protected from moisture intrusion, supporting reliable use in wet or outdoor locations.
  • Fuse Holder Functionality: Provides a secure, accessible mounting point for a fuse, supporting overcurrent protection on the circuit it is installed in.
  • Field-Serviceable Design: The compact in-line format keeps the fuse holder close to the circuit it protects, making routine inspection and fuse replacement easier during field maintenance.
  • Simple, Panel-Free Installation: Because the WPB1 mounts in-line rather than in a box or panel, it can be added to a conductor run in locations where a full enclosure is impractical.
  • Littelfuse Engineering: Backed by Littelfuse's long-standing focus on circuit protection components used across commercial, industrial, and OEM electrical systems.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Outdoor and Wet-Location Electrical Installations
  • In-Line Fuse Protection for Branch Circuits
  • Commercial and Industrial Equipment Wiring
  • Exterior Lighting and Landscape Circuit Protection
  • Renovation and New Construction Projects Requiring Sealed, Field-Serviceable Connections

Why Littelfuse?

Littelfuse is a well-established manufacturer of circuit protection components, and the WPB1 Series reflects that focus with a watertight, in-line fuse holder built for dependable performance in exposed installation environments. For electrical professionals who need a sealed, field-serviceable way to add fuse protection to a circuit run, the WPB1 Series offers a straightforward solution that helps guard connections against moisture-related failures over time.

Product Specs

Product Type:
Fuse Holder
Series:
WPB1
Configuration:
In-Line
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Fuse Holders & Blocks

Littelfuse LITWPB1 – Frequently Asked Questions

1) Does the Littelfuse WPB1 fuse holder need a box or panel to mount?
No. The WPB1 is an in-line holder, so it mounts directly in the conductor run itself. There is no panel cutout or separate enclosure required, which is why it gets used in spots where a full enclosure is impractical.
2) Can a WPB1 in-line fuse holder be used outdoors or in a wet location?
That is what it is built for. The WPB1 uses a watertight sealed housing to keep moisture away from the fuse element and the connection points, so it suits outdoor, wet-location and other exposed runs where an unsealed holder would corrode and eventually fail at the connection.
3) Is the fuse in a WPB1 holder replaceable in the field, or is the unit sealed shut?
It is serviceable. The WPB1 is designed to open for fuse inspection and replacement, and because it sits in-line right next to the circuit it protects, a tech does not have to trace back to a panel to change the fuse.
4) What is the manufacturer part number to order the Littelfuse WPB1?
Order it as Littelfuse WPB1. That single model covers the series, so there are no finish or size options to pick between when you specify it.
5) What jobs does a watertight in-line fuse holder like the WPB1 actually get used on?
Typical uses are exterior lighting and landscape circuits, in-line fuse protection on branch circuits, commercial and industrial equipment wiring, and renovation or new construction work where a sealed but field-serviceable connection point is wanted.
6) Where do I get the electrical ratings for the WPB1 fuse holder before I spec it?
Amp, voltage and fuse-size data for the WPB1 comes from Littelfuse's own paperwork: a WPB1 spec sheet and the full Littelfuse product catalog are both published as PDFs with the product, and those are what to size the fuse and conductors against.
How fast can I get the Littelfuse LITWPB1 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 Littelfuse LITWPB1 come with a warranty?
Absolutely. The Littelfuse LITWPB1 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 Littelfuse LITWPB1?
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 Littelfuse LITWPB1 from ZenSupply?
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