Equivalent & Substitute Parts for RGE700

Part Overview

The RGE700 is a Polymeric PTC Resettable Fuse manufactured by Littelfuse, rated for 16V at 7A hold current with a 11.9A trip current. This component is classified as Obsolete, making identification of suitable alternatives essential for ongoing system support and new design implementations. The RGE700 operates as a Through Hole Radial Disc package and is RoHS non-compliant, which may impact procurement for regulated applications.

Substiute Parts

RGE700

LittelfuseIn Stock: 1192RGE700 Datasheet

Current PartRFQ

RGEF700

LittelfuseIn Stock: 3104RGEF700 Datasheet

DirectRFQ

MF-RHT450-0

Bourns Inc.In Stock: 8307MF-RHT450-0 Datasheet

MFR RecommendedRFQ

MF-RHT450-2

Bourns Inc.In Stock: 2465MF-RHT450-2 Datasheet

MFR RecommendedRFQ

MF-RHT450-AP

Bourns Inc.In Stock: 701MF-RHT450-AP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RGE700 is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Voltage rating must equal or exceed 16V maximum
• Current hold (Ih) rating must support 7A minimum
• Current trip (It) rating must accommodate 11.9A minimum
• Resistance characteristics (Ri and R1) must fall within acceptable operational ranges

Mechanical Compatibility Criteria:

• Mounting type must be Through Hole
• Package configuration must be Radial, Disc
• Lead spacing must accommodate 0.201" (5.10mm) PCB hole patterns

Regulatory Considerations:

• RoHS compliance status affects suitability for regulated applications
• Approval agencies and certifications determine use in specific industries

The substitute parts identified fall into two categories: direct Littelfuse alternatives and cross-manufacturer Bourns equivalents. Direct Littelfuse alternatives maintain identical electrical specifications with improved compliance status. Bourns Multifuse® alternatives provide electrical compatibility with different hold current ratings and enhanced temperature operating ranges.

Parameter Comparison

Engineering Selection Recommendations

RGEF700 (Littelfuse Direct Replacement)

The RGEF700 is the primary substitute for the obsolete RGE700. This part maintains identical electrical specifications (7A hold current, 11.9A trip current) and mechanical compatibility (Radial Disc package with 5.05mm lead spacing). The RGEF700 is Active status with ROHS3 compliance and holds CSA, TUV, and UL approvals, making it suitable for regulated applications where the original RGE700 cannot be procured. The minimal difference in initial resistance (7.7 mOhms vs. 8 mOhms) and lead spacing (5.05mm vs. 5.10mm) presents negligible impact on circuit performance and PCB layout compatibility.

MF-RHT450 Series (Bourns Cross-Manufacturer Alternative)

The MF-RHT450-0, MF-RHT450-2, and MF-RHT450-AP represent functionally equivalent alternatives from Bourns Inc. These parts share identical voltage rating (16V) and maximum current (100A) with the RGE700 but operate at reduced hold current (4.5A vs. 7A) and trip current (7.8A vs. 11.9A). The MF-RHT450 series is suitable only for applications where the circuit design can accommodate lower trip thresholds. All three variants are Active status with ROHS3 compliance and AEC-Q200 automotive qualification. The extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C for RGEF700) provides thermal performance advantage. Lead spacing of 2.90mm requires PCB layout modification from the original 5.10mm spacing.

Packaging Variants:

MF-RHT450-0 is supplied in Bulk packaging, MF-RHT450-2 in Cut Tape, and MF-RHT450-AP in Tape & Box configuration. Selection depends on procurement volume and assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can RGEF700 be used as a direct replacement for RGE700?

A: Yes. The RGEF700 maintains identical electrical specifications (7A hold current, 11.9A trip current, 16V rating) and mechanical form factor (Radial Disc, Through Hole). Lead spacing differs by 0.05mm (5.05mm vs. 5.10mm), which is within standard PCB tolerance. The RGEF700 is Active status with improved RoHS3 compliance and regulatory approvals.

Q: What are the limitations of using MF-RHT450 series as substitutes?

A: The MF-RHT450 series operates at lower hold current (4.5A vs. 7A) and trip current (7.8A vs. 11.9A). These parts are suitable only for circuits designed to function with reduced protection thresholds. Lead spacing is 2.90mm, requiring PCB modification from the original 5.10mm pattern. Verify circuit requirements before selection.

Q: Are all substitute parts RoHS compliant?

A: RGEF700 and all MF-RHT450 variants are ROHS3 compliant. The original RGE700 is RoHS non-compliant. For applications requiring RoHS compliance, RGEF700 or MF-RHT450 series must be selected.

Q: What certifications do the substitute parts hold?

A: RGEF700 holds CSA, TUV, and UL approvals. MF-RHT450 series holds AEC-Q200 automotive qualification. The original RGE700 has no specified approval agencies listed.

Q: Does lead spacing difference affect PCB compatibility?

A: RGEF700 lead spacing (5.05mm) is compatible with standard 5.10mm PCB hole patterns with minimal tolerance margin. MF-RHT450 series lead spacing (2.90mm) requires PCB redesign. Verify hole pattern specifications before component selection.

Q: What is the inventory status of substitute parts?

A: RGEF700 has 3092 pieces in stock. MF-RHT450-0 has 8288 pieces, MF-RHT450-2 has 2360 pieces, and MF-RHT450-AP has 664 pieces available.