Equivalent & Substitute Parts for 0ZCD0250FF2C

Part Overview

The 0ZCD0250FF2C is a polymeric PTC resettable fuse manufactured by Bel Fuse Inc., rated for 16V at 2.5A hold current in a 2920 surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. Polymeric PTC resettable fuses provide automatic overcurrent protection by increasing resistance when current exceeds trip thresholds, then resetting when the fault condition clears.

Key Parameters

Parameter	Value
Voltage - Max	16V
Current - Hold (Ih) (Max)	2.5 A
Current - Trip (It)	5 A
Type	Polymeric
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C
Resistance - Initial (Ri) (Min)	25 mOhms
Resistance - Post Trip (R1) (Max)	85 mOhms

Substitute Part Grouping Explanation

Substitution eligibility for the 0ZCD0250FF2C is determined by the following critical parameters:

Voltage rating must equal or exceed 16V maximum
Current hold (Ih) rating must equal 2.5A
Current trip (It) rating must equal 5A
Polymeric PTC type construction
Surface mount configuration
Operating temperature range of -40°C to 85°C
Post-trip resistance (R1) maximum of 85 mOhms

The substitute parts listed below meet these core electrical and mechanical requirements, though packaging configurations and physical dimensions may vary.

Parameter Comparison

Parameter	0ZCD0250FF2C	0ZCF0250FF2C	MF-SM250-2	SMD250F-2
Manufacturer	Bel Fuse Inc.	Bel Fuse Inc.	Bourns Inc.	Littelfuse Inc.
Voltage - Max	16V	16V	15V	15V
Current - Hold (Ih) (Max)	2.5 A	2.5 A	2.5 A	2.5 A
Current - Trip (It)	5 A	5 A	5 A	5 A
Current - Max	40 A	100 A	100 A	40 A
Time to Trip	16 s	16 s	25 s	25 s
Resistance - Initial (Ri) (Min)	25 mOhms	25 mOhms	24 mOhms	35 mOhms
Resistance - Post Trip (R1) (Max)	85 mOhms	85 mOhms	85 mOhms	85 mOhms
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Product Status	Obsolete	Active	Active	Active
Package / Case	2920 (7351 Metric)	2920 (7351 Metric), Concave	2-SMD	2-SMD
Size / Dimension	0.290" L x 0.202" W (7.36mm x 5.12mm)	0.290" L x 0.202" W (7.36mm x 5.12mm)	0.344" L x 0.264" W (8.75mm x 6.71mm)	0.343" L x 0.250" W (8.70mm x 6.36mm)
Thickness (Max)	0.035" (0.90mm)	0.035" (0.90mm)	0.118" (3.00mm)	0.118" (3.00mm)
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	cURus, TUV	AEC-Q200, cURus, TUV	cURus, TUV	CSA, TUV, UL

Engineering Selection Recommendations

The 0ZCF0250FF2C from Bel Fuse Inc. is the primary direct substitute for the obsolete 0ZCD0250FF2C. Both components share identical electrical ratings (16V, 2.5A hold, 5A trip), matching package dimensions (2920 format at 7.36mm x 5.12mm), and identical resistance characteristics. The 0ZCF0250FF2C is currently in active production status with higher inventory availability and includes AEC-Q200 automotive qualification in addition to cURus and TUV approvals.

The MF-SM250-2 (Bourns Inc.) and SMD250F-2 (Littelfuse Inc.) are functional alternatives that meet the core electrical requirements but operate with different package geometries (2-SMD format, larger physical dimensions at 8.75mm x 6.71mm and 8.70mm x 6.36mm respectively, with increased thickness at 3.00mm). These alternatives are suitable only if PCB layout accommodates the larger footprint. Both are ROHS3 compliant and actively produced.

Voltage consideration: The MF-SM250-2 and SMD250F-2 are rated at 15V maximum, which is 1V lower than the original 16V specification. Selection of these alternatives requires confirmation that the application circuit operates at or below 15V.

Frequently Asked Questions (FAQ)

Q: Can the 0ZCF0250FF2C directly replace the 0ZCD0250FF2C without PCB modification?

A: Yes. The 0ZCF0250FF2C maintains identical package dimensions (2920 format, 7.36mm x 5.12mm) and electrical ratings, allowing direct substitution on existing PCB layouts without footprint changes.

Q: What are the key differences between the Bel Fuse substitute and the Bourns/Littelfuse alternatives?

A: The 0ZCF0250FF2C preserves the original 2920 package footprint. The MF-SM250-2 and SMD250F-2 use larger 2-SMD packages (approximately 8.7mm x 6.4mm with 3.00mm thickness versus 0.90mm). PCB layout compatibility must be verified before selecting these alternatives.

Q: Does the 1V voltage rating difference between 16V and 15V affect substitution suitability?

A: The MF-SM250-2 and SMD250F-2 are rated at 15V maximum. These parts are suitable only for circuits operating at 15V or below. If the application requires 16V operation, use the 0ZCF0250FF2C.

Q: Are all substitute parts RoHS compliant?

A: The 0ZCF0250FF2C, MF-SM250-2, and SMD250F-2 are all ROHS3 compliant. The original 0ZCD0250FF2C RoHS status is not specified in available documentation.

Q: What certifications should I verify for automotive applications?

A: The 0ZCF0250FF2C includes AEC-Q200 qualification. The MF-SM250-2 lists AEC-Q200 in ratings. The SMD250F-2 does not specify AEC-Q200 certification. Verify certification requirements with your application specifications.

Q: How do time-to-trip differences affect circuit protection?

A: The 0ZCD0250FF2C and 0ZCF0250FF2C both trip in 16 seconds. The MF-SM250-2 and SMD250F-2 trip in 25 seconds. Slower trip times may affect circuit protection response. Confirm that the 25-second trip time is acceptable for your application before selecting these alternatives.

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