0ZRC0185FF2B Equivalent & Substitute Parts

Part Overview

The 0ZRC0185FF2B is a polymeric PTC resettable fuse manufactured by Bel Fuse Inc., designed for overcurrent protection in through-hole applications. This component operates at a maximum voltage of 90V with a hold current of 1.85A and is rated for AEC-Q200 compliance. The part is currently active in production with 813 units in stock. Substitute parts are identified when equivalent electrical characteristics and mechanical compatibility exist within the allowed parameter tolerances for this product category.

Substiute Parts

0ZRC0185FF2B

Bel Fuse Inc.In Stock: 8560ZRC0185FF2B Datasheet

Current PartRFQ

RXEF185

LittelfuseIn Stock: 3390RXEF185 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0ZRC0185FF2B is determined by matching the following critical electrical and mechanical parameters:

• Current - Hold (Ih) (Max): 1.85A
• Current - Trip (It): 3.7A
• Resistance - Initial (Ri) (Min): 80 mOhms
• Resistance - Post Trip (R1) (Max): 190 mOhms
• Time to Trip: 12.6s
• Operating Temperature Range: -40°C to 85°C
• Mounting Type: Through Hole
• Package / Case: Radial, Disc

The RXEF185 from Littelfuse meets these core electrical specifications. The maximum voltage rating differs (72V versus 90V), which restricts its use to applications operating at or below 72V. Physical dimensions show minor variations within acceptable tolerances for radial disc packages. Both components maintain identical hold current, trip current, resistance characteristics, and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

The RXEF185 (Littelfuse) is a qualified substitute for the 0ZRC0185FF2B when the application circuit operates at maximum voltages of 72V or lower. Both components are active products with current manufacturing status and full RoHS3 compliance. The RXEF185 carries broader approval agency certifications (CQC, CSA, TUV, UL) compared to the 0ZRC0185FF2B (cURus, TUV). Electrical performance characteristics—including hold current, trip current, resistance values, and thermal response—are identical between the two parts. Selection between these components depends solely on the maximum voltage requirement of the target application circuit.

Frequently Asked Questions (FAQ)

Q: Can RXEF185 be used in place of 0ZRC0185FF2B in all applications?

A: The RXEF185 is suitable only for applications where the circuit voltage does not exceed 72V. The 0ZRC0185FF2B supports up to 90V operation. If your application requires 90V operation, the 0ZRC0185FF2B is the required choice.

Q: Are the physical dimensions compatible between these two parts?

A: Both components use radial disc packaging with minor dimensional variations. The 0ZRC0185FF2B measures 0.701" L x 0.122" W with 0.902" seated height. The RXEF185 measures 0.689" Dia x 0.118" T with 0.882" seated height. These differences are within acceptable tolerances for radial disc through-hole mounting.

Q: Do both parts have identical electrical performance?

A: Yes. Hold current (1.85A), trip current (3.7A), initial resistance (80 mOhms minimum), post-trip resistance (190 mOhms maximum), and time to trip (12.6s) are identical. Operating temperature range (-40°C to 85°C) is also identical.

Q: What compliance certifications apply to each part?

A: The 0ZRC0185FF2B holds cURus and TUV approvals with AEC-Q200 rating. The RXEF185 holds CQC, CSA, TUV, and UL approvals. Both are ROHS3 compliant and REACH unaffected.

Q: What is the difference in packaging between these parts?

A: The 0ZRC0185FF2B is supplied in Tape & Reel (TR) packaging. The RXEF185 is supplied in Bag packaging. This affects order quantities and handling but does not impact electrical or mechanical compatibility.