Mersen 20306R Fuse Block 250VAC 250VDC Class R 30A 1-Pole Box with Reinforced Clip
Alternate Item Number: 20306R
UPC: 782001750374
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Overview
- Single-pole Class R fuse block rated for 250VAC/DC and 30A
- Reinforced box connector and spring-reinforced clip for reliable copper wire connections
- Phenolic insulator with dielectric strength exceeding 2500V
- Compatible with Class R fuses (A2D-R, A2K-R, TR-R for 250V)
- Durable phenolic insulator with >2500V dielectric strength
Specifications
AC Voltage Rating | 250 V |
Amperage Rating | 30 A |
Brand Name | Mersen |
Class | Class R |
Connection | Box with Reinforced Clip |
Connection Type | Box with Reinforced Clip |
Connection Type | Box Connector |
Current Rating | 30A |
DC Voltage Rating | 250 V |
Material | Glass Filled Polycarbonate |
Material | Phenolic |
Material | Glass-filled polycarbonate (GFPC) or phenolic |
Maximum Operating Temperature | 80 C |
Maximum Operating Temperature | 80 °C |
Mounting | Direct Screw Mount |
Number Of Poles | 1 |
Phase | 1 |
Poles | 1-pole |
Series | Class R |
Size | 3 x 1.25 x 1.38 in |
Size | 76.2 x 31.75 x 35.052 mm |
Standard | All fuse blocks meet the requirements of UL 4248 UL listed, guide IZLT, File E52283 UL recognized component guide IZLT2, file E52283 CSA certified class 6225, File 32169 |
Type | UL/CSA Fuse Bases |
Voltage Rating | 250 VAC |
Package Dimensions (L x W x H) | 3 in x 1.25 in x 1.38 in |
Package Dimensions (L x W x H) | 76.2 mm x 31.75 mm x 35.052 mm |
Package Weight (Imperial) | 0.140 lb |
Package Weight (Metric) | 0.064 kg |
LS2572-3DIN
POWR-BLOKS power distribution blocks offer a safe, convenient way of splicing cables, providing a fixed junction tap-off point or splitting primary power into secondary circuits. LX2XXX-DIN series offers integral DIN-Rail mount and an optional hinged safety cover. Applications: Typical applications include heating, air conditioning and refrigeration systems, elevator systems, material handling equipment, control panels, motor controls, switchgear, and anywhere power needs to be distributed to more than one load.
Frequently Asked Questions
What is the dielectric strength of the insulator?
The phenolic insulator has a verified dielectric strength exceeding 2500V.
What certifications does the 20306R have?
The 20306R meets UL 4248 requirements and is UL listed (guide IZLT, File E52283) and CSA certified (class 6225, File 32169).
What fuse types are compatible with the 20306R?
The 20306R is designed for Class R fuses, including A2D-R, A2K-R, and TR-R for 250V applications.
Can the 20306R be used with adder poles?
No, the 1-pole 30A block does not accept adder poles.
What wire types are supported by the 20306R?
The fuse block is designed for copper wires only, with clips optimized for copper wire expansion.
What is the short-circuit current rating (SCCR) for Class R fuses?
The SCCR for Class R fuses is 200kA.
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.