JLLN050.T Equivalent & Substitute Parts

Part Overview

The JLLN050.T is a 50A cartridge fuse rated for 300 VAC and 160 VDC operation, manufactured by Littelfuse Inc. under the POWR-GARD® JLLN series. This fast-blow Class T fuse is designed for electrical and industrial applications requiring holder-mounted protection. The part maintains active product status with 857 units in current inventory. Substitute parts become necessary when supply constraints occur, specific packaging requirements must be met, or alternative manufacturer certifications are required for system compliance.

Substiute Parts

JLLN050.T

Littelfuse Inc.In Stock: 936JLLN050.T Datasheet

Current PartRFQ

JJN-50

Eaton - Bussmann Electrical DivisionIn Stock: 967JJN-50 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JLLN050.T is based on electrical equivalence across the following critical parameters: current rating (50A), AC voltage rating (300 VAC), DC voltage rating (160 VDC), fuse class (T), response time (fast blow), and breaking capacity (200kA AC / 20kA DC). The JJN-50 manufactured by Eaton - Bussmann Electrical Division meets all these electrical specifications. Physical dimensions vary slightly (JLLN050.T: 0.563" Dia × 0.874" L versus JJN-50: 0.560" Dia × 0.880" L), remaining within acceptable cartridge tolerance ranges for standard holder compatibility. Both parts maintain identical RoHS3 compliance and REACH unaffected status. Packaging differs (JLLN050.T supplied in box; JJN-50 in bulk), affecting procurement and inventory management but not functional performance.

Parameter Comparison

Engineering Selection Recommendations

The JJN-50 serves as a direct electrical equivalent to the JLLN050.T for 50A, 300 VAC / 160 VDC cartridge fuse applications. Both parts carry active product status and maintain full regulatory compliance under RoHS3 and REACH standards. The JJN-50 holds CE, CSA, and UL certifications, while the JLLN050.T holds CE, CSA, and UR certifications. Selection between these parts depends on system certification requirements: applications requiring UL approval should specify JJN-50; those requiring UR approval should specify JLLN050.T. Physical dimensions are equivalent within standard cartridge holder tolerances. Packaging format (box versus bulk) affects procurement logistics but does not impact electrical performance or mechanical fit.

Frequently Asked Questions (FAQ)

Q: Can JJN-50 replace JLLN050.T in existing installations? A: Yes. Both fuses share identical electrical ratings (50A, 300 VAC, 160 VDC, Class T, fast blow) and breaking capacity (200kA AC, 20kA DC). Physical dimensions are within acceptable tolerance for standard cartridge holders. Verify that system certifications accept both CE/CSA/UL (JJN-50) or CE/CSA/UR (JLLN050.T) approval marks.

Q: What is the difference in physical size between these parts? A: JLLN050.T measures 0.563" diameter × 0.874" length; JJN-50 measures 0.560" diameter × 0.880" length. These variations fall within standard cartridge fuse tolerance ranges and do not affect holder compatibility.

Q: Are there packaging differences between these substitutes? A: Yes. JLLN050.T is supplied in box packaging; JJN-50 is supplied in bulk packaging. This affects inventory management and procurement quantities but does not impact electrical performance or mechanical installation.

Q: Do both parts meet the same regulatory standards? A: Both parts are RoHS3 compliant and REACH unaffected. Certification differences exist: JLLN050.T carries CE, CSA, and UR approvals; JJN-50 carries CE, CSA, and UL approvals. Select based on your system's required certification body.

Q: What is the breaking capacity of these fuses? A: Both fuses have a breaking capacity of 200kA at rated AC voltage and 20kA at rated DC voltage, meeting Class T specifications for industrial and electrical applications.