Mersen PS 20x127 Series Compac...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$11.99
Mersen PS 20x127 Series Compact Fuse Holder, Multi-Pole

Mersen PS 20x127 Series Compact Fuse Holder, Multi-Pole

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Model: MERPS-201

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

$11.99
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Mersen PS 20x127 Series Compact Fuse Holder, Multi-Pole

The Mersen PS 20x127 Series Compact Fuse Holder, Multi-Pole is a fuse holder and fuse disconnector line built for ferrule-type fuses, offering a solid assembly with good thermal and mechanical withstand. Available in 1, 2, 3, and 4-pole configurations, this family complies with the IEC 60947-3 standard (AC 20A class) and is offered in phenolic resin for basic applications or fiber-glass polyester construction for corrosive-atmosphere and traction environments. Fuse mounting is available in holders or disconnectors, with or without pre-isolating and blown-fuse indicating microswitches.

Key Features

  • Multi-Pole Configuration: Offered in 1, 2, 3, and 4-pole versions to match circuit and panel requirements.
  • Durable Construction: Solid assembly design provides good thermal and mechanical withstand for demanding installations.
  • Material Options: Phenolic resin for basic applications, or fiber-glass polyester construction for corrosive atmospheres and traction applications.
  • Fuse Compatibility: Designed for ferrule-type fuses, size 20x127, mounted in holders or disconnectors.
  • Optional Pre-Isolating: Fuse mounting available with or without pre-isolating for added flexibility.
  • Blown-Fuse Indication: Optional blown-fuse indicating microswitches available for quick fault detection.
  • Electrical Rating: Complies with the IEC 60947-3 standard, AC 20A class.

Certifications & Compliance

  • IEC 60947-3 Compliant (AC 20A Class)

Technical Specifications

  • CE Conformity: Consult Technical Services
  • Lead Free: Consult Technical Services
  • Number of Poles: 1, 2, 3, 4
  • Size per Standard: 20x127
  • RoHS Compliant: Consult Technical Services

Typical Applications

  • Industrial Motor Control and Power Distribution Panels
  • Fuse Protection for Ferrule-Type Fuses
  • Corrosive-Atmosphere and Traction Equipment (fiber-glass polyester models)
  • Panelboard and Switchgear Fuse Mounting
  • OEM Electrical Equipment Assemblies

Why Mersen?

Mersen PS 20x127 Series fuse holders pair a solid, thermally and mechanically robust assembly with configurable pole counts and material options to suit both standard and demanding environments. With phenolic resin and fiber-glass polyester construction choices plus compliance to the IEC 60947-3 standard (AC 20A class), this fuse holder series delivers dependable, code-compliant fuse protection for professional electrical work.

Manufacturer Resources

Mersen Product Catalog

Product Specs

Ce Conformity:
Consult Technical Services
Lead Free:
Consult Technical Services
Number Of Poles:
1 2 3 4
Size Per Standard:
20x127
ROHS Compliant:
Consult Technical Services
list_batch:
MERSEN-20260825
Department:
Electrical
Product Group:
Circuit Protection
Product Type:
Fuse Holder
Product Subgroup:
Fuse Holders & Blocks

Mersen MERPS-201 – Frequently Asked Questions

1) Can I get the Mersen PS fuse holder in a 3-pole version for a three-phase panel?
Yes. The PS 20x127 family is made in 1, 2, 3, and 4-pole versions, so a three-phase circuit takes the 3-pole and three-phase plus neutral takes the 4-pole. Pole count is a build option, so specify it with the order.
2) Which Mersen PS body material should I choose for a corrosive or washdown environment?
Two constructions are offered. Phenolic resin covers basic applications. For corrosive atmospheres and traction (rail/transit) equipment, choose the fiber-glass polyester construction, which is the version the series specifies for those environments.
3) Is the Littelfuse WPB1 in-line fuse holder a substitute for a Mersen PS 20x127 fuse holder?
No. The Mersen PS 20x127 fuse holder is a panel-mounted holder or disconnector for 20x127 ferrule-type fuses, built in 1, 2, 3, and 4-pole configurations for motor control and power distribution panels. The Littelfuse WPB1 is an in-line watertight fuse holder, meaning the fuse sits in a sealed body spliced into a wire run rather than mounted on a panel rail with multi-pole gang assembly. If the drawing calls for a 20x127 ferrule fuse in a panelboard or switchgear, the PS series is the holder family that accepts it; the WPB1 suits a single sealed in-line fuse in a wet location.
4) What should I use instead of a Mersen PS 20x127 fuse holder for a residential plug fuse panel?
The Mersen PS 20x127 is for ferrule-type fuses in size 20x127 and is aimed at industrial motor control, power distribution, and OEM panel assemblies, so it will not accept a screw-in plug fuse. For a plug fuse application, the Littelfuse LSRY series plug fuse box cover unit is the item rated 125V 15A for that style of fuse. Match the holder to the fuse body the circuit actually uses: ferrule for the Mersen PS, plug base for the LSRY.
5) What is the difference between the Mersen PS fuse holder and a fuse disconnector version?
The PS 20x127 line is offered both ways. A plain holder carries and clamps the fuse; the disconnector version lets you break the circuit by withdrawing the carrier, which is how you isolate the load for fuse replacement without pulling upstream power. Pre-isolating is also optional, so if you need the control circuit to open before the main contacts part, that has to be specified.
6) Is there a way to see from the panel that a fuse in the Mersen PS holder has blown?
Optional blown-fuse indicating microswitches are available on the PS 20x127 Series. The microswitch gives you a contact you can wire to a lamp or PLC input for remote fault detection. It is an option, not standard, so it must be called out when you order.
7) Does the Mersen PS 20x127 fuse holder meet IEC 60947-3?
Yes, the PS 20x127 Series complies with IEC 60947-3, AC 20A class. That is the switch/disconnector/fuse-combination-unit standard, so it is the rating a specifier looks for on an industrial panel build.
8) I need a watertight in-line fuse holder, not a panel-mounted one. What else is there?
The Mersen PS 20x127 is a panel/DIN style holder for ferrule fuses inside an enclosure, not a sealed in-line device. For an in-line watertight application, the Littelfuse WPB1 Series in-line watertight fuse holder is the type to look at instead.
9) Will the Mersen PS holder work for residential plug fuses?
No. The PS 20x127 takes 20x127 ferrule-type cylindrical fuse links for industrial panels. For a residential plug-fuse box, the Littelfuse LSRY Series plug fuse box cover unit (125V, 15A) is the right category of product.
10) I need a fuse holder for a washdown or outdoor location - does the Mersen PS 20x127 work, or is there another option?
Two different approaches. The Mersen PS 20x127 fuse holder is offered in fiber-glass polyester construction specifically for corrosive atmospheres and traction equipment, with phenolic resin for basic applications, so the enclosure it sits in provides the environmental seal while the holder material resists the atmosphere. The Littelfuse WPB1 series takes the other route as a watertight in-line holder, sealing at the holder itself for a single fuse spliced into a cable run. For a panel in a corrosive plant environment, specify the fiber-glass polyester PS; for an exposed single-fuse circuit with no enclosure, the in-line watertight style applies.
11) Which fuse holder gives me blown-fuse indication?
The Mersen PS 20x127 series offers optional blown-fuse indicating microswitches, along with optional pre-isolating, so a fault can be signalled back to a controller rather than found by testing fuses by hand. The Littelfuse WPB1 in-line watertight holder and the LSRY plug fuse box cover unit are straightforward fuse-carrying devices without that switched indication feature. If remote fault detection is part of the control scheme, the PS series is the one configured for it.
12) What typical jobs is the Mersen PS 20x127 fuse holder used on?
It goes into industrial motor control and power distribution panels, panelboard and switchgear fuse mounting, OEM equipment assemblies, and with the fiber-glass polyester body, corrosive-atmosphere and traction equipment. The solid assembly is specified for thermal and mechanical withstand in those duties.
13) Can I gang single in-line fuse holders instead of buying a multi-pole Mersen PS 20x127?
You can protect each conductor separately that way, but it is a different build. The Mersen PS 20x127 is supplied as a solid multi-pole assembly in 1, 2, 3, and 4-pole versions with good thermal and mechanical withstand, which keeps a three-phase feeder on one mounted block with consistent spacing and optional common blown-fuse indication. Assembling individual Littelfuse WPB1 in-line watertight holders gives you separate sealed bodies in the wire run instead of a single panel-mounted device, so you lose the ganged mounting and the indicating microswitch option.
How fast can I get the Mersen MERPS-201 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 Mersen MERPS-201 come with a warranty?
Absolutely. The Mersen MERPS-201 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 Mersen MERPS-201?
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
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