Polymeric PTC Resettable Fuse 0ZCD0300FF2C (6V, 3A, 2920)

Part Overview

The 0ZCD0300FF2C is a polymeric PTC resettable fuse manufactured by Bel Fuse Inc., rated for 6V maximum voltage and 3A hold current in a 2920 (7351 Metric) surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part provides overcurrent protection with automatic recovery characteristics typical of polymeric PTC devices.

Substiute Parts

0ZCD0300FF2C

Bel Fuse Inc.In Stock: 7380ZCD0300FF2C Datasheet

Current PartRFQ

0ZCF0300FF2C

Bel Fuse Inc.In Stock: 24870ZCF0300FF2C Datasheet

DirectRFQ

2920L300DR

Littelfuse Inc.In Stock: 44592920L300DR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 0ZCD0300FF2C is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Requirements:

• Voltage rating: 6V maximum
• Current hold (Ih): 3A maximum
• Current trip (It): 5.0–5.2A range
• Resistance characteristics: Initial resistance (Ri) minimum 10 mOhms, post-trip resistance (R1) maximum 48 mOhms
• Operating temperature range: -40°C to 85°C

Mechanical Compatibility Requirements:

• Package type: 2920 (7351 Metric) surface mount
• Physical dimensions: 0.290" L x 0.202" W (7.36mm x 5.12mm)
• Mounting: Surface mount configuration

Acceptable Variations:

• Current maximum (It) rating may exceed 40A (up to 100A) without affecting substitution validity
• Thickness may vary within manufacturing tolerances
• Concave package geometry is acceptable
• Product status may differ (active vs. obsolete)

The two substitute parts listed below meet all critical electrical and mechanical parameters and are therefore direct functional equivalents.

Parameter Comparison

Engineering Selection Recommendations

0ZCF0300FF2C (Bel Fuse Inc.) - Primary Substitute

This part is the direct successor within the Bel Fuse product line. It maintains identical electrical specifications (6V, 3A hold, 5.2A trip) and mechanical compatibility (2920 package, same dimensions). The 0ZCF0300FF2C is active in production with higher current maximum rating (100A vs. 40A), providing greater design margin. It includes AEC-Q200 automotive qualification in addition to cURus and TUV approvals, and is ROHS3 compliant. Packaging is available in Tape & Reel format with 2430 units in stock.

2920L300DR (Littelfuse Inc.) - Secondary Substitute

This Littelfuse POLY-FUSE® part meets all critical electrical parameters with minor variations: current trip is 5A (within acceptable range), time to trip is 20s (faster response), and initial resistance is 15 mOhms (slightly higher). Physical dimensions are within tolerance (7.35mm vs. 7.36mm length), though thickness is greater at 0.049" (1.25mm). The part is active in production, ROHS3 compliant, and carries cURus and TUV approvals. Inventory availability is strong at 4400 units in Tape & Reel packaging.

Both substitutes are suitable for direct replacement in applications where the 0ZCD0300FF2C was originally specified. Selection between them depends on supply chain preference, compliance requirements, and tolerance for minor parameter variations.

Frequently Asked Questions (FAQ)

Q: Can the 0ZCF0300FF2C replace the 0ZCD0300FF2C in all applications?

A: Yes. The 0ZCF0300FF2C maintains identical voltage (6V), hold current (3A), trip current (5.2A), and package dimensions (2920, 7.36mm x 5.12mm). Both parts have the same operating temperature range (-40°C to 85°C) and post-trip resistance (48 mOhms max). The higher current maximum rating (100A vs. 40A) does not affect compatibility.

Q: What is the difference between the Bel Fuse and Littelfuse substitutes?

A: The 0ZCF0300FF2C (Bel Fuse) has identical trip current (5.2A) and time to trip (25s) as the original part. The 2920L300DR (Littelfuse) has slightly faster trip time (20s) and marginally higher initial resistance (15 mOhms vs. 10 mOhms). Both meet the 3A hold current and 6V voltage requirements. The Littelfuse part is thicker (1.25mm vs. 0.90mm), which may affect PCB layout in space-constrained designs.

Q: Are there packaging differences between these substitutes?

A: The 0ZCD0300FF2C original part does not specify concave geometry. Both substitutes (0ZCF0300FF2C and 2920L300DR) feature concave package geometry, which is standard for modern 2920 PTC fuses and does not affect electrical performance or PCB mounting compatibility.

Q: Do all three parts have the same compliance certifications?

A: The 0ZCF0300FF2C includes AEC-Q200 automotive qualification in addition to cURus and TUV approvals. The 2920L300DR has cURus and TUV approvals. Both substitutes are ROHS3 compliant. The original 0ZCD0300FF2C does not specify RoHS status. All three parts are REACH Unaffected and carry EAR99 ECCN classification.

Q: Can I use the 2920L300DR if my design requires the exact time-to-trip specification?

A: The 2920L300DR has a time to trip of 20 seconds compared to the original 25 seconds. If your circuit design depends on the 25-second response time, the 0ZCF0300FF2C is the more precise match. If faster protection response is acceptable or beneficial, the 2920L300DR is suitable.

Q: What is the moisture sensitivity level for these parts?

A: All three parts carry MSL 2A (4 Weeks) rating, indicating identical moisture handling requirements. Parts must be stored in dry conditions and used within four weeks of bag opening under standard conditions.