Equivalent & Substitute Parts for 0ZCD0050FF2C

Part Overview

The 0ZCD0050FF2C is a polymeric PTC resettable fuse manufactured by Bel Fuse Inc., rated for 60V at 500 mA hold current in a 2920 surface mount package. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The part provides overcurrent protection with automatic reset capability across industrial and consumer electronics applications operating between -40°C and 85°C.

Key Parameters

Parameter	Value
Voltage - Max	60V
Current - Hold (Ih) (Max)	500 mA
Current - Trip (It)	1 A
Time to Trip	4 s
Resistance - Initial (Ri) (Min)	300 mOhms
Resistance - Post Trip (R1) (Max)	1.4 Ohms
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Type	Polymeric

Substitute Part Grouping Explanation

Substitution eligibility for the 0ZCD0050FF2C is determined by strict equivalence across the following critical parameters: maximum voltage rating (60V), hold current (500 mA), trip current (1 A), time to trip (4 s), post-trip resistance maximum (1.4 Ohms), operating temperature range (-40°C to 85°C), and polymeric type classification. All identified substitutes meet these core electrical specifications. Package form variations exist between 2920 (7351 Metric) and 2-SMD configurations; both are surface mount technologies suitable for equivalent circuit protection applications. Initial resistance (Ri) values range from 300 to 350 mOhms across the part family, all within acceptable tolerance for this application class.

Parameter Comparison

Parameter	0ZCD0050FF2C (Main)	0ZCF0050FF2C	2920L050DR	MF-SM050-2	PFSM.050.2	SMD050F-2
Manufacturer	Bel Fuse Inc.	Bel Fuse Inc.	Littelfuse Inc.	Bourns Inc.	SCHURTER Inc.	Littelfuse Inc.
Voltage - Max	60V	60V	60V	60V	60V	60V
Current - Hold (Ih) (Max)	500 mA	500 mA	500 mA	500 mA	500 mA	500 mA
Current - Trip (It)	1 A	1 A	1 A	1 A	1 A	1 A
Time to Trip	4 s	4 s	4 s	4 s	4 s	4 s
Resistance - Initial (Ri) (Min)	300 mOhms	300 mOhms	350 mOhms	350 mOhms	350 mOhms	350 mOhms
Resistance - Post Trip (R1) (Max)	1.4 Ohms	1.4 Ohms	1.4 Ohms	1.4 Ohms	1.4 Ohms	1.4 Ohms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Type	Polymeric	Polymeric	Polymeric	Polymeric	Polymeric	Polymeric
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The 0ZCD0050FF2C is obsolete and requires substitution for new designs and ongoing production. All five substitute parts maintain electrical equivalence across critical protection parameters. Selection should prioritize active product status and compliance certifications.

The 0ZCF0050FF2C (Bel Fuse Inc.) provides the closest form factor match in 2920 package configuration with concave geometry and active product status. This part carries AEC-Q200 automotive qualification and ROHS3 compliance.

The 2920L050DR (Littelfuse Inc., POLY-FUSE® series) offers 2920 package compatibility with active status, ROHS3 compliance, and cURus/TUV certifications. Inventory availability is substantial at 40,577 units.

The SMD050F-2 (Littelfuse Inc., PolySwitch® series) provides 2-SMD package configuration with active status, ROHS3 compliance, and CSA/TUV/UL certifications. This part supports high-volume applications with 22,214 units in stock.

The MF-SM050-2 (Bourns Inc., Multifuse® series) and PFSM.050.2 (SCHURTER Inc.) both offer 2-SMD package alternatives with active status, AEC-Q200 ratings, and ROHS3 compliance. These parts support automotive and industrial applications.

Frequently Asked Questions (FAQ)

Q: Can 0ZCD0050FF2C be directly replaced with any of these substitutes?

A: All five substitute parts meet the core electrical specifications: 60V maximum voltage, 500 mA hold current, 1 A trip current, 4 second trip time, and 1.4 Ohms maximum post-trip resistance. Direct electrical substitution is valid. Physical package differences (2920 versus 2-SMD) require PCB layout verification.

Q: What is the difference between 2920 and 2-SMD packages?

A: The 2920 package (7351 Metric) is a specific rectangular surface mount form factor measuring 7.36mm × 5.12mm. The 2-SMD designation indicates a two-terminal surface mount device with similar electrical function but different physical dimensions. Both are surface mount technologies; PCB footprint compatibility must be confirmed before substitution.

Q: Why is the 0ZCD0050FF2C obsolete?

A: The original part is classified as obsolete by the manufacturer. Active alternatives from multiple manufacturers (Bel Fuse, Littelfuse, Bourns, SCHURTER) provide equivalent electrical performance with current product support and compliance certifications.

Q: Are there compliance differences between substitutes?

A: All substitutes carry ROHS3 compliance. The 0ZCF0050FF2C, MF-SM050-2, and PFSM.050.2 include AEC-Q200 automotive qualification. The SMD050F-2 carries CSA/TUV/UL certifications. Selection should align with application-specific compliance requirements.

Q: What is the significance of initial resistance (Ri) variation between 300 and 350 mOhms?

A: Initial resistance values of 300 mOhms (0ZCD0050FF2C, 0ZCF0050FF2C) and 350 mOhms (remaining substitutes) are within the same electrical class for 500 mA hold current devices. Both values support equivalent circuit protection performance at the specified operating parameters.

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