RGE1400 Equivalent & Substitute Parts

Part Overview

The RGE1400 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc. in the PolySwitch® series, rated for 16V maximum voltage and 14A hold current. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

PTC resettable fuses provide automatic overcurrent protection by increasing resistance when excessive current flows, then resetting when the fault condition clears. The RGE1400's obsolete status requires identification of active alternative components that maintain electrical and mechanical compatibility.

Substiute Parts

RGE1400

Littelfuse Inc.In Stock: 881RGE1400 Datasheet

Current PartRFQ

RGEF1400

Littelfuse Inc.In Stock: 810RGEF1400 Datasheet

DirectRFQ

0ZRA1400FF1A

Bel Fuse Inc.In Stock: 9530ZRA1400FF1A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for PTC resettable fuses is determined by the following critical parameters:

• Voltage rating must equal or exceed the application requirement (16V minimum)
• Hold current (Ih) must match or exceed the circuit's normal operating current (14A minimum)
• Trip current (It) must be compatible with fault detection thresholds (23.8A nominal)
• Mounting type and package must be physically compatible (Through Hole, Radial, Disc)
• Lead spacing must accommodate existing PCB layouts (0.400" nominal tolerance)

Both identified substitutes meet these core electrical and mechanical requirements while offering improved product status or compliance advantages.

Parameter Comparison

Engineering Selection Recommendations

RGEF1400 is the primary substitute for RGE1400. Both components are manufactured by Littelfuse Inc. within the PolySwitch® series and share identical electrical specifications including voltage, hold current, trip current, and resistance characteristics. RGEF1400 is active in production status, ensuring long-term availability. The component achieves ROHS3 compliance, addressing regulatory requirements that the obsolete RGE1400 does not meet. Physical dimensions and lead spacing are compatible with existing RGE1400 PCB layouts.

0ZRA1400FF1A from Bel Fuse Inc. is a secondary substitute option. It maintains the same voltage and hold current ratings with compatible lead spacing (0.402" versus 0.400"). This component is active and ROHS3 compliant. The 0ZRA series exhibits slightly lower initial resistance (2 mOhms minimum versus 2.6 mOhms) and higher post-trip resistance (8 mOhms maximum versus 6.4 mOhms). The extended time-to-trip specification (20 seconds versus 9 seconds) may affect circuit response characteristics in fault conditions. The 0ZRA1400FF1A carries AEC-Q200 automotive qualification, suitable for applications requiring automotive-grade reliability.

Frequently Asked Questions (FAQ)

Q: Can RGEF1400 be used as a direct replacement for RGE1400?

A: Yes. RGEF1400 maintains identical electrical specifications (16V, 14A hold current, 23.8A trip current) and compatible physical dimensions. Both are Littelfuse PolySwitch® components with the same lead spacing. RGEF1400 is active in production and ROHS3 compliant.

Q: What are the differences between RGEF1400 and 0ZRA1400FF1A?

A: Both are active substitutes with matching voltage and hold current ratings. RGEF1400 offers faster response time (9 seconds versus 20 seconds) and lower post-trip resistance (6.4 mOhms maximum versus 8 mOhms). 0ZRA1400FF1A includes AEC-Q200 automotive qualification and slightly lower initial resistance (2 mOhms minimum). Lead spacing differs marginally (0.400" versus 0.402"), both compatible with standard 0.400" pitch layouts.

Q: Are there packaging differences between these substitutes?

A: RGE1400 is supplied in standard packaging. RGEF1400 is packaged in bags. 0ZRA1400FF1A is packaged in boxes. These packaging differences do not affect electrical or mechanical compatibility; they reflect manufacturing and distribution practices.

Q: Which substitute should be selected for new designs?

A: RGEF1400 is recommended for new designs requiring direct compatibility with existing RGE1400 specifications. It provides identical electrical performance, active production status, and ROHS3 compliance. 0ZRA1400FF1A is suitable when automotive-grade qualification (AEC-Q200) is required.

Q: Does lead spacing variation affect PCB compatibility?

A: Lead spacing differs by 0.002" (0.002" between 0.400" and 0.402"). This variation is within standard PCB tolerance for radial component mounting and does not prevent physical installation in existing RGE1400 footprints.