Bussmann CH143DNMSU-F Eaton's ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$785.31
Bussmann CH143DNMSU-F Eaton's series 3-Pole + 1 Neutral modular fuse holder, rated at 690 V a.c./750 V d.c. (IEC), 700 V a.c. (UL), 50 Amps (IEC and UL), fitted with a microswitch, suitable for 14 x 51 mm Cylindrical fuses

Bussmann CH143DNMSU-F Eaton's series 3-Pole + 1 Neutral modular fuse holder, rated at 690 V a.c./750 V d.c. (IEC), 700 V a.c. (UL), 50 Amps (IEC and UL), fitted with a microswitch, suitable for 14 x 51 mm Cylindrical fuses

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Model: CH143DNMSU-F
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$785.31
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Bussmann CH143DNMSU-F Eaton's series 3-Pole + 1 Neutral modular fuse holder, rated at 690 V a.c./750 V d.c. (IEC), 700 V a.c. (UL), 50 Amps (IEC and UL), fitted with a microswitch, suitable for 14 x 51 mm Cylindrical fuses.

  • Voltage rating: 690 V
  • Product type: fuse accessory
  • Dimensions (L x W x H): 57 x 225 x 65 mm

Genuine Bussmann part number CH143DNMSU-F.

Manufacturer Resources

Product Specs

Amperage Rating:
50 A
Application:
C14G(A)S fuses
Built In Depth:
51.5 in
Certifications:
IEC 60269-2
Compliances:
CE Marked
Concurrently Switching N Neutral:
No
Degree Of Protection:
IP20
Fuse Size:
14 x 51 mm
Lockable:
Yes
Mounting Method:
DIN rail
Number Of Poles:
Three-pole
Optical Defect Indication:
No
Product Height:
65 mm
Product Length Depth:
57 mm
Product Weight:
800 g
Product Width:
225 mm
Voltage Rating:
690 V
Width In Number Of Modular Spacings:
6
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
fuse accessory
Product Details:
fuse accessory

Bussmann CH143DNMSU-F – Frequently Asked Questions

1) Is the CH143DNMSU-F a 3-pole or a 4-pole fuse holder, and does the neutral switch with the phases?
It is a three-pole holder with an added neutral (3P+N). The neutral is not concurrently switching, so it does not break at the same time as the three phases. If your installation requires the neutral to open and close together with the line poles, this is the wrong version for that opening.
2) How much DIN rail space do I need in the panel for this Bussmann 3P+N holder?
Budget 6 modular spacings of rail width. The body measures 57 x 225 x 65 mm and weighs 800 g. It clips onto standard DIN rail, so no separate back panel or mounting kit is needed.
3) Will a 690 V fuse holder like the CH143DNMSU-F work on a 480 V or 600 V system?
Yes. It is rated 690 V a.c. / 750 V d.c. to IEC and 700 V a.c. to UL, at 50 A on both, so 480 V and 600 V three-phase circuits sit well inside the rating. Using a holder above the system voltage is normal practice; what you must not do is go the other way.
4) What does the microswitch on the CH143DNMSU-F do?
The -F suffix version is fitted with a microswitch, which gives you an auxiliary contact tied to the carrier position. Wire it back to a PLC input, contactor coil, or panel indicator so the control system knows when a fuse carrier has been pulled. Note that this model has no optical blown-fuse indicator, so the microswitch signals carrier position rather than a blown link.
5) Can this fuse holder be locked out for maintenance?
Yes, the CH143DNMSU-F is lockable, so the carriers can be secured in the open position for lock-out/tag-out before work downstream. Combined with the microswitch, you get both a physical lock and an electrical signal back to the control circuit.
6) Can I mount this Bussmann fuse holder outdoors or in a wash-down area?
No. Protection is IP20, which is finger-safe against solid objects but offers no protection against water. It belongs inside an enclosed panel or cabinet; for a damp, dusty, or outdoor location you need a sealed enclosure rated for that environment.
7) Does the CH143DNMSU-F meet IEC standards for a European panel build?
It is built to IEC 60269-2 and is CE marked, which covers low-voltage fuse gear for industrial use. That plus the 690 V a.c. IEC rating makes it usable in a CE-marked control panel; the separate 700 V a.c. UL rating covers North American work.
8) Does the Bussmann CH143DNMSU-F come with fuses included?
No. It is the holder only, a fuse accessory. You order the 14 x 51 mm cylindrical links separately, sized to the load and not above the 50 A rating of the holder.
9) What exactly do I order to get the microswitch version of this Eaton modular fuse holder?
The part number is CH143DNMSU-F. The trailing -F is the microswitch build; ordering the base CH143 designation without it gets a holder with no auxiliary contact. It ships as a single 3P+N unit for 14 x 51 mm links at 50 A.
How fast can I get the Bussmann CH143DNMSU-F 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 Bussmann CH143DNMSU-F come with a warranty?
Absolutely. The Bussmann CH143DNMSU-F 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 Bussmann CH143DNMSU-F?
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 Bussmann CH143DNMSU-F from ZenSupply?
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