Equivalent & Substitute Parts for 3JQ 4.6-R

Part Overview

The 3JQ 4.6-R is a fast-blow glass cartridge fuse manufactured by Bel Fuse Inc., rated at 4.6 A with 350 V AC and 140 V DC voltage ratings. This fuse is designed for through-hole mounting in 2AG form factor (5mm x 15mm axial configuration) and is currently in active production status. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the allowed parameter tolerances for this fuse category.

Substiute Parts

3JQ 3.5-R

Bel Fuse Inc.In Stock: 9833JQ 3.5-R Datasheet

Current PartRFQ

022403.5MXP

Littelfuse Inc.In Stock: 1819022403.5MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3JQ 4.6-R is determined by the following critical parameters:

• Current Rating: Must be 4.6 A (exact match required)
• Fuse Type and Response Time: Must be cartridge glass with fast-blow characteristic
• Package / Case: Must be 2AG form factor with 5mm x 15mm axial dimensions
• Mounting Type: Must be through-hole compatible
• Operating Temperature Range: Must support -55°C ~ 125°C minimum
• RoHS Compliance: Must maintain ROHS3 compliance status

The substitute part 022404.6MXP from Littelfuse Inc. meets these core substitution criteria. Voltage ratings and breaking capacity differ from the main part; however, these differences are documented in the parameter comparison table below for engineering evaluation.

Parameter Comparison

Engineering Selection Recommendations

Both the 3JQ 4.6-R and 022404.6MXP are active production components with ROHS3 compliance and international regulatory approvals. The 3JQ 4.6-R carries CE, CSA, cURus, and PSE certifications, while the 022404.6MXP carries CE, CSA, PSE, and UL certifications. Selection between these parts must be based on the specific voltage and breaking capacity requirements of the application circuit. The 3JQ 4.6-R is rated for higher AC and DC voltages (350 V AC / 140 V DC) compared to the 022404.6MXP (250 V AC / 125 V DC). The 022404.6MXP provides higher DC breaking capacity (10kA DC versus 150A DC). Both parts share identical current ratings, form factors, and operating temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can the 022404.6MXP replace the 3JQ 4.6-R in all applications?

A: Substitution is valid only when the application circuit voltage does not exceed 250 V AC or 125 V DC. If the circuit operates at the full rated voltage of the 3JQ 4.6-R (350 V AC or 140 V DC), the 022404.6MXP is not suitable.

Q: Are the physical dimensions identical between these two fuses?

A: Both fuses use the 2AG form factor with 5mm x 15mm axial configuration. Minor dimensional variations exist (3JQ 4.6-R: 0.217" Dia x 0.591" L; 022404.6MXP: 0.185" Dia x 0.570" L), but both are mechanically compatible with standard 2AG through-hole mounting.

Q: What is the significance of the different melting I²t values?

A: The melting I²t value (9 for 3JQ 4.6-R; 6.7 for 022404.6MXP) indicates the thermal energy required to melt the fuse element. The lower I²t of the 022404.6MXP means it responds faster to overcurrent conditions. This difference must be evaluated against the specific protection requirements of the circuit.

Q: Do both fuses have the same approval certifications?

A: Both fuses carry CE, CSA, and PSE certifications. The 3JQ 4.6-R additionally includes cURus certification, while the 022404.6MXP includes UL certification. Application requirements may dictate which certification set is necessary.

Q: What does the DC cold resistance difference mean for circuit performance?

A: The 3JQ 4.6-R has lower DC cold resistance (0.022 Ohms) compared to the 022404.6MXP (0.0265 Ohms). In DC circuits, this results in lower voltage drop across the fuse element during normal operation. For applications sensitive to voltage drop, this difference should be evaluated.