RGE1000 Equivalent & Substitute Parts

Part Overview

The RGE1000 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., rated for 16V maximum voltage and 10A hold current. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical and mechanical compatibility while meeting current compliance standards.

Substiute Parts

RGE1000

Littelfuse Inc.In Stock: 1074RGE1000 Datasheet

Current PartRFQ

RGEF1000

LittelfuseIn Stock: 1064RGEF1000 Datasheet

DirectRFQ

0ZRA1000FF1A

Bel Fuse Inc.In Stock: 10690ZRA1000FF1A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RGE1000 is determined by the following critical parameters:

• Voltage Rating: Maximum voltage must be 16V or greater
• Current - Hold (Ih): Must be rated for 10A hold current minimum
• Current - Trip (It): Must be rated for 17A trip current minimum
• Mounting Type: Through Hole configuration required
• Package / Case: Radial, Disc form factor required
• Lead Spacing: Tolerance range 5.05mm ±0.10mm acceptable for PCB compatibility

Two active substitute parts meet these criteria: RGEF1000 (Littelfuse) and 0ZRA1000FF1A (Bel Fuse Inc.). Both maintain identical voltage and current ratings while offering improved compliance status compared to the obsolete RGE1000.

Parameter Comparison

Engineering Selection Recommendations

RGEF1000 is the primary substitute for RGE1000. Both parts are manufactured by Littelfuse within the PolySwitch® series, share identical electrical ratings and physical dimensions, and maintain the same 6-second trip time. RGEF1000 is active in production and achieves ROHS3 compliance, addressing the regulatory limitations of the obsolete RGE1000. Approval agencies remain consistent (CSA, TUV, UL).

0ZRA1000FF1A is an alternative substitute manufactured by Bel Fuse Inc. This part maintains all critical electrical parameters (16V, 10A hold, 17A trip) and achieves ROHS3 compliance. Physical dimensions show minor variations: length increases from 16.00mm to 16.50mm and width from 2.50mm to 3.00mm. Lead spacing tolerance remains within acceptable PCB compatibility range (5.10mm vs. 5.05mm). Time to trip extends to 12.5 seconds, which may affect circuit protection response characteristics. Approval agencies differ slightly (cURus, TUV vs. CSA, TUV, UL). This part includes AEC-Q200 automotive qualification.

For applications requiring identical form factor and response time, RGEF1000 is the direct replacement. For applications where slightly extended trip time and automotive qualification are acceptable, 0ZRA1000FF1A provides an alternative with marginally different physical footprint.

Frequently Asked Questions (FAQ)

Q: Can RGEF1000 replace RGE1000 in existing designs without PCB modification?

A: Yes. RGEF1000 maintains identical dimensions (16.00mm L x 2.50mm W), lead spacing (5.05mm), and electrical ratings (16V, 10A hold, 17A trip, 6s trip time). Direct substitution is possible without PCB layout changes.

Q: What are the physical compatibility considerations for 0ZRA1000FF1A?

A: 0ZRA1000FF1A has slightly larger dimensions (16.50mm L x 3.00mm W vs. 16.00mm L x 2.50mm W) and lead spacing of 5.10mm versus 5.05mm. PCB footprint verification is required before substitution. The component may not fit existing through-hole patterns designed for RGE1000.

Q: How does trip time affect circuit protection?

A: RGE1000 and RGEF1000 both trip in 6 seconds at rated current. 0ZRA1000FF1A extends this to 12.5 seconds. Longer trip times delay fault response, which may be unsuitable for applications requiring rapid overcurrent protection. Verify circuit protection requirements before selecting 0ZRA1000FF1A.

Q: Are all substitutes RoHS compliant?

A: RGE1000 is RoHS non-compliant. Both RGEF1000 and 0ZRA1000FF1A are ROHS3 compliant, meeting current environmental regulations for new production.

Q: Which substitute has broader regulatory approval?

A: RGEF1000 maintains the original approval agencies (CSA, TUV, UL). 0ZRA1000FF1A carries cURus and TUV approval, with additional AEC-Q200 automotive qualification. Application requirements determine which certification set is necessary.

Q: What is the difference in initial resistance between substitutes?

A: RGE1000 and RGEF1000 specify 4 mOhms minimum initial resistance. 0ZRA1000FF1A specifies 3 mOhms minimum, representing lower resistance and potentially reduced voltage drop under normal operating conditions.