RGEF1000-1 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The RGEF1000-1 is a polymeric PTC resettable fuse manufactured by Littelfuse in the PolySwitch® RGEF series. This component provides overcurrent protection with automatic reset capability in through-hole radial configuration. The part is active in production with 1009 units in current inventory. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across the specified operating parameters.

Substiute Parts

RGEF1000-1

LittelfuseIn Stock: 1068RGEF1000-1 Datasheet

Current PartRFQ

RGEF1000

LittelfuseIn Stock: 1064RGEF1000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RGEF1000-1 is determined by strict equivalence across the following critical parameters:

• Voltage rating: 16V maximum
• Current hold specification: 10 A maximum
• Current trip specification: 17 A
• Resistance characteristics: Initial minimum 4 mOhms, post-trip maximum 10.2 mOhms
• Operating temperature range: -40°C to 85°C
• Mounting configuration: Through hole radial disc package
• Lead spacing: 0.199" (5.05mm)
• Regulatory compliance: CSA, TUV, UL certifications
• Environmental compliance: ROHS3 compliant

The RGEF1000 qualifies as a direct substitute based on identical electrical specifications and regulatory certifications. Physical dimension variance in length (0.630" vs 0.649") remains within acceptable tolerance for through-hole radial mounting applications.

Parameter Comparison

Engineering Selection Recommendations

Both RGEF1000-1 and RGEF1000 maintain identical electrical performance specifications and regulatory certifications. Selection between these parts is based on availability and application requirements:

• RGEF1000-1: Primary selection with higher current inventory (1009 units)
• RGEF1000: Alternative selection with adequate inventory (956 units)

Both parts carry active product status from Littelfuse and satisfy CSA, TUV, and UL approval requirements. ROHS3 compliance is maintained across both variants. The minor physical dimension difference in length does not affect electrical function or mechanical compatibility in standard through-hole radial mounting applications.

Frequently Asked Questions (FAQ)

Q: Can RGEF1000 replace RGEF1000-1 in existing designs?

A: Yes. Both parts are electrically identical with matching voltage, current, resistance, and temperature specifications. Lead spacing and mounting configuration are identical. The length difference (0.630" vs 0.649") is within acceptable tolerance for through-hole applications.

Q: What determines substitution eligibility for this PTC resettable fuse?

A: Substitution requires matching voltage rating (16V), current hold (10 A), current trip (17 A), resistance characteristics (4 mOhms initial, 10.2 mOhms post-trip), operating temperature range (-40°C to 85°C), lead spacing (5.05mm), and regulatory certifications (CSA, TUV, UL).

Q: Are there inventory considerations when selecting between these parts?

A: RGEF1000-1 has higher inventory availability (1009 units) compared to RGEF1000 (956 units). Both maintain active production status with Littelfuse.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both RGEF1000-1 and RGEF1000 carry identical certifications: CSA, TUV, and UL approval. Both are ROHS3 compliant.

Q: What is the significance of the lead spacing specification?

A: Lead spacing of 0.199" (5.05mm) is a critical mechanical parameter for through-hole PCB mounting. Both substitute parts maintain identical lead spacing, ensuring direct compatibility with existing board layouts.