RGE900 Equivalent & Substitute Parts

Part Overview

The RGE900 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., rated for 16V and 9A hold current in a through-hole radial disc package. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement. Substitute parts must maintain electrical performance within the specified voltage, current, and thermal parameters while meeting modern compliance requirements.

Substiute Parts

RGE900

Littelfuse Inc.In Stock: 1077RGE900 Datasheet

Current PartRFQ

RGEF900

LittelfuseIn Stock: 2866RGEF900 Datasheet

DirectRFQ

0ZRA0900FF1A

Bel Fuse Inc.In Stock: 11060ZRA0900FF1A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RGE900 is determined by the following criteria:

• Voltage rating must equal or exceed 16V maximum
• Current hold (Ih) rating must equal 9A
• Current trip (It) rating must equal 15.3A
• Mounting type must be through hole
• Package type must be radial disc configuration
• Component type must be polymeric PTC resettable fuse

Two active substitute parts meet these electrical and mechanical requirements: RGEF900 (Littelfuse) and 0ZRA0900FF1A (Bel Fuse Inc.). Both maintain identical core electrical specifications while offering improved product status and compliance certifications compared to the obsolete RGE900.

Parameter Comparison

Engineering Selection Recommendations

RGEF900 is the primary substitute for RGE900 applications. Both components are manufactured by Littelfuse within the PolySwitch series, maintaining identical electrical trip characteristics (15.3A at 5.5s). RGEF900 is currently in active production status with ROHS3 compliance and holds CSA, TUV, and UL certifications. Resistance parameters are marginally improved (4.7 mOhms initial vs. 5 mOhms), and operating temperature range is explicitly defined at -40°C to 85°C.

0ZRA0900FF1A from Bel Fuse Inc. serves as a secondary substitute option. This component maintains identical voltage and hold current ratings with equivalent trip current. The extended time-to-trip specification (12s vs. 5.5s) and slightly different dimensional tolerances (0.551" L x 0.118" W vs. 0.530" L x 0.100" W) require circuit-level verification for timing-sensitive applications. This part carries AEC-Q200 automotive qualification and cURus/TUV certifications with ROHS3 compliance.

Both substitutes are RoHS3 compliant and REACH unaffected, addressing regulatory requirements absent in the obsolete RGE900.

Frequently Asked Questions (FAQ)

Q: Can RGEF900 be used as a direct replacement for RGE900? A: Yes. RGEF900 maintains identical electrical specifications (16V, 9A hold, 15.3A trip) and through-hole radial disc packaging. The primary advantage is active product status with modern compliance certifications.

Q: What is the difference between RGEF900 and 0ZRA0900FF1A? A: Both parts meet the core electrical requirements. RGEF900 maintains the original 5.5-second trip time, while 0ZRA0900FF1A specifies 12 seconds. Dimensional differences exist: 0ZRA0900FF1A is slightly larger (0.551" L x 0.118" W vs. 0.531" L x 0.100" W). Select based on circuit timing requirements and available board space.

Q: Are there packaging differences between these substitutes? A: RGEF900 is supplied in bag packaging, while 0ZRA0900FF1A is supplied in box packaging. Lead spacing is nominally equivalent (0.199" to 0.201"), supporting interchangeable through-hole mounting.

Q: Which substitute has better compliance certifications? A: RGEF900 holds CSA, TUV, and UL approvals. 0ZRA0900FF1A holds cURus and TUV approvals with AEC-Q200 automotive qualification. Selection depends on end-application regulatory requirements.

Q: Is RGE900 still available for procurement? A: RGE900 is classified as obsolete. Current inventory exists (973 pcs reported), but long-term availability is not guaranteed. Migration to active substitutes is recommended for new designs and ongoing production.