Mersen USM3I Fuse Holder UltraSafe™ 600VAC 600VDC Midget 30A 3-Pole LED Pressure Plate IP20
Alternate Item Number: USM3I
UPC: 782001830014
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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
- 3-Pole Midget Fuse Holder with LED Blown Fuse Indicator
- 600VAC / 600VDC Rated, 30A Maximum Current
- IP20 Finger-Safe Protection for Safe Fuse Changes
- Durable Polyamide Body with Exceptional Insulation
- 35mm DIN-rail Mountable for Space and Time Savings
Specifications
AC Voltage Rating | 600 V |
Amperage Rating | 30 A |
Application | All circuits up to 600 volts for motors, control circuits, transformers, etc… DC circuits up to 1000VDC including photovoltaic applications Non-load disconnect |
Brand Name | Mersen |
Class | Midget |
Connection | Pressure Plate |
DC Voltage Rating | 600 V |
Material | Polyamide |
Maximum Operating Temperature | 80 C |
Mounting | DIN Rail |
Number Of Poles | 3-pole |
Number of poles | 3 |
Operating Temperature, Maximum | 176 F |
Phase | 3 |
Size | 3.07 x 2.07 x 2.32;77.978 x 52.578 x 58.928 in;mm |
Special Features | IP20 Finger-Safe (touch safe) Optional visual blown fuse Indicator lights DIN-rail mounting Compact footprint Quick, tool-free, easy fuse change outs USM use with: ATQ, ATM, A6Y-2B, A25Z-2, TRM, OTM, A13X-2, A60Q-2, DCT, HP6M, HP10M USCC use with: ATDR, ATMR, ATQR ATM, DCT, ATMR recommended for DC applications |
Standard | UL Listed to Standard 4248- 4 (class CC) and UL Recognized to Standard 4248-1 (midget), File E52283 UL Listed to standard 4248-18 (photovoltaic), File E347822 CSA Certified C22.2 IEC 60269-2-1 and 60947-3 Compliant (USM only) |
Sub Brand | UltraSafe™ |
Type | UL/CSA Fuse Holders |
Voltage Rating | 600 VAC |
Package Dimensions (L x W x H) | 3.07 in x 2.07 in x 2.32 in |
Package Dimensions (L x W x H) | 77.978 mm x 52.578 mm x 58.928 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 types of fuses are compatible with USM and USCC holders?
USM holders are compatible with ATQ, ATM, A6Y-2B, A25Z-2, TRM, OTM, A13X-2, A60Q-2, DCT, HP6M, and HP10M fuses. USCC holders are compatible with ATDR, ATMR, and ATQR fuses.
What are the voltage and amperage ratings for USM fuse holders?
USM fuse holders have a maximum rating of 800VAC and 1000VDC, with a maximum amperage of 30A.
What are the voltage and amperage ratings for USCC fuse holders?
USCC fuse holders have a maximum rating of 600VAC/DC, with a maximum amperage of 30A.
What is the SCCR for USM and USCC fuse holders?
USM fuse holders have an SCCR of 200kA AC and 100kA DC. USCC fuse holders have an SCCR of 200kA.
Are the UltraSafe fuse holders finger-safe?
Yes, UltraSafe holders qualify as 'Finger-safe' under IEC and DIN standards to an IP20 grade of protection.
What is the operating temperature range for these fuse holders?
The operating temperature range for the UltraSafe fuse holders is -40° to 85°C.
What is the suggested screw torque for the terminal screws?
The suggested screw torque for the terminal screws is 14.75 in-lbs.
What wire sizes can be used with these fuse holders?
The wire range is #14 to 6 AWG (2.5 to 16mm2) for single conductor and #14 to 10 AWG (2.5 to 5.0 mm2) for dual conductor.
What is the flammability rating of the UltraSafe fuse holder body material?
The UltraSafe body material has a flammability rating of UL 94-V0.
What are the applications for these fuse holders?
Applications include circuits up to 600 volts for motors, control circuits, transformers, DC circuits up to 1000VDC including photovoltaic, and non-load disconnect.
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.