Mersen USGM3I Fuse Holder UltraSafe™ 600VAC 600VDC Midget 30A 3-Pole LED Cage Clamp IP20
Alternate Item Number: USGM3I
UPC: 782001437947
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Contact for Pricing
Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.
Overview
- Mersen UltraSafe™ 3-pole fuse holder
- Rated for 600VAC and 600VDC
- 30A maximum current rating
- Integrated LED status indicators
- Cage Clamp™ screw-less spring pressure termination
Specifications
AC Voltage Rating | 600 V |
Amperage Rating | 30 A |
Application | All circuits up to 750VAC / 1000VDC for power control, power distribution and power electronics Non-load disconnect |
Brand Name | Mersen |
Class | Midget |
Connection | Cage Clamp |
Connection Type | Cage Clamp |
Current Rating | 30A |
DC Voltage Rating | 600 V |
IP Rating | IP20 |
Material | Polyamide |
Maximum Operating Temperature | 80 C |
Mounting | DIN Rail |
Number of poles | 3 |
Number Of Poles | 3-pole |
Operating Temperature, Maximum | 176 F |
Phase | 3 |
Poles | 3-pole |
Series | UltraSafe |
Size | 4.13 x 2.04 x 2.17;104.902 x 51.816 x 55.118 in;mm |
Special Features | Equipped with industry proven, patented WAGO CAGE CLAMP® technology (over 25 years of field experience and acceptance) Reduce wire installation time by up to 75 Highly reliable, maintenance free wire contact Secure, vibration proof, corrosion resistant, temperature cycling resistant, cost saving wire connection Quick, tool-free, easy fuse change-outs IP20 finger-safe protection Option visual blown fuse indicator DIN-rail mounting Compact footprint Environmentally conscious, RoHS compliant and lead free RECOMMENDED FUSE USAGE: USGM use with Midget Fuses: ATQ, ATM, TRM, OTM, A60Q-2, DCT-2 USGCC use with Class CC Fuses: ATDR, ATQR, ATMR USGM-HEL use with Photovoltaic Fuses: HP6M, HP10M |
Standard | UL Listed to Standard 4248-4 (Class CC) and 4248-1 (Midget), File E52283 UL Listed to Standard 4248-18 (Photovoltaic), File E347822 CSA Certified C22.2 IEC Compliant (USGM only) |
Sub Brand | UltraSafe™ |
Type | UL/CSA Fuse Holders |
Voltage Rating | 600 VAC |
Voltage Rating | 600VAC/600VDC |
Package Dimensions (L x W x H) | 4.13 in x 2.04 in x 2.17 in |
Package Dimensions (L x W x H) | 104.902 mm x 51.816 mm x 55.118 mm |
Package Weight (Imperial) | 0.430 lb |
Package Weight (Metric) | 0.195 kg |

LEXCYC
The Littelfuse 600 V in-line watertight fuse holders are the ideal answer for all high humidity and corrosive environments where fuses are required. Available in both breakaway and non-breakaway, single and double pole versions, these fuse holders allow maximum flexibility for any application.
E91N/30CC
E 91N/30 CC is a fuseholder for overcurrent and short circuit protection specific for class CC fuses
IP20
Terminal Covers (2 Covers Per Kit). Field installed primary and secondary IEC Touch Proof Cover Kit.Frequently Asked Questions
What is the maximum voltage and amperage rating for USGM fuse holders?
The USGM fuse holders have a maximum rating of 750VAC and 1000VDC, with a maximum amperage of 30A.
What type of fuses are compatible with the USGM fuse holders?
USGM fuse holders are designed for Midget Fuses including ATQ, ATM, TRM, OTM, A60Q-2, and DCT-2.
What is the operating temperature range for the USGM fuse holders?
The USGM fuse holders can operate in a temperature range of -40 to +85°C.
What wire sizes can be used with the USGM fuse holders?
The terminals accept #14 to 6 AWG single conductor wire and #14 to 10 AWG dual conductor wire.
Does the USGM fuse holder have a blown fuse indicator option?
Yes, there is an option for a visual blown fuse indicator, with a red indicator lens.
What is the SCCR rating for the USGM fuse holders?
The Short Circuit Current Rating (SCCR) is 200kA AC and 100kA DC.
What mounting options are available for the USGM fuse holders?
The USGM fuse holders are designed for DIN-rail mounting.
What is the wire strip length required for the USGM terminals?
The required wire strip length for the terminals is 12-13 mm (0.49 in).
Are the USGM fuse holders compliant with environmental regulations?
Yes, they are environmentally conscious, RoHS compliant, and lead-free.
What is the flammability rating of the USGM fuse holders?
The USGM fuse holders have a flammability rating of UL 94-V0.
Frequently Asked Questions about Mersen
What industries and applications are Mersen products used for?
Mersen products are used across diverse industrial sectors including solar power, electric vehicles, buildings/construction, industrial automation, power distribution, HVAC, elevators, telecommunications, and specialty manufacturing. Key application areas include circuit protection, surge protection, battery module protection, electrical safety systems, and power management for residential, commercial, and utility-scale installations.
What are the main product lines offered by Mersen?
Mersen offers five primary electrical power product lines: IEC and UL/CSA Fuses and Fusegear, Surge Protection, Low Voltage Disconnect Switches, Power Distribution Blocks, and Engineered Solutions. Their comprehensive range includes specialized components like high-speed fuses, modular fuse holders, surge arresters, and custom-engineered electrical protection systems for industrial and power management applications.
What are the key features of Mersen products?
Mersen products feature advanced electrical protection and power management solutions with key characteristics including finger-safe design, compact modularity, and high-performance safety features. Their product lines span electrical power components like fuses, surge protection, power distribution blocks, and specialized solutions for industrial, solar, and building applications. Critical features include UL/CSA approvals, high short-circuit current ratings, and innovative technologies like the Fuse Control™ program that minimize electrical risks and optimize system performance.
What environmental ratings do Mersen products have?
Mersen products meet rigorous environmental ratings across multiple standards, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13, CSA Type 1, 2, 3, 4, 4X, 12, and 13, and NEMA Type 1, 2, 3, 4, 4X, 12, and 13. They feature IEC 60529 IP66 protection, with enhanced UV inhibitors for outdoor weathering and operating temperatures ranging from -40°C to 130°C (-40°F to 266°F). These ratings ensure superior protection in wet, corrosive, and challenging industrial environments.
What accessories are available for Mersen products?
Mersen offers multiple accessories for their fuse blocks and systems, including safety pullers (DFC3M and DFC3LP), DIN-rail adapters (DRM), bus bars, auxiliary contacts, and specialized mounting hardware. Key accessories include the DFC3M safety puller for 1-1/2" x 13/32" midget or Class CC fuses, the DRM adapter for mounting 303 series fuse blocks on DIN-rail, and UltraSafe fuse module accessories like bus bars and auxiliary contacts that enable module interconnection and monitoring.
How are Mersen products typically installed?
Mersen products are typically installed in electrical distribution systems, control panels, and industrial automation environments using multiple mounting options. These include service entrance panel mounting, distribution panel installation, control panel DIN rail mounting, and custom engineered solutions like Fused Coordination Panelboards. Installation depends on the specific product type, such as fuses, surge protective devices, or switches, and is designed to provide electrical protection and circuit safety in various industrial and commercial applications.
What certifications and standards do Mersen products comply with?
Mersen products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Our products meet rigorous safety and performance standards for industrial applications across North America, China, Russia, and other global markets, ensuring compliance and reliability in electrical power and advanced materials solutions.
What technical support does Mersen offer?
Mersen provides comprehensive technical support through multiple channels, including technical experts located in your time zone who can assist with product selection, application guidance, and troubleshooting. Their Fuse Control™ program offers a free Fuse Inventory Audit & Analysis, and customers can access technical resources through their sales representatives and online platform ep.mersen.com.







