SF54-TP General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The SF54-TP is a general purpose rectifier diode manufactured by Micro Commercial Co, rated for 200 V DC reverse voltage and 5 A average rectified current in a DO-201AD axial through-hole package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and procurement needs. The SF54-TP features fast recovery characteristics with a reverse recovery time of 35 ns and operates across a junction temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	5	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 5 A	mV
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	DO-201AD, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-55°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SF54-TP are classified into three categories based on electrical and mechanical parameter alignment:

Direct Equivalent (Packaging Variant): SF54G-TP maintains identical electrical specifications with the same 200 V reverse voltage, 5 A current rating, 35 ns reverse recovery time, and 950 mV forward voltage drop. The primary difference is packaging format (Tape & Reel versus bulk) and active product status. This part is a direct functional replacement.

Parametric Equivalent (Same Electrical Class): ER502_R2_00001 from Panjit International Inc. matches all critical electrical parameters: 200 V reverse voltage, 5 A current rating, 950 mV forward voltage, and 35 ns reverse recovery time. Packaging is Cut Tape format. This part provides identical electrical performance with superior reverse leakage characteristics (1 µA versus 5 µA).

Similar Substitute (Reduced Current Rating): BY251P-E3/73 from Vishay General Semiconductor operates at the same 200 V reverse voltage but with a reduced 3 A current rating. This part features standard recovery characteristics (3 µs reverse recovery time) rather than fast recovery, and exhibits higher forward voltage (1.1 V @ 3 A). This substitute is applicable only in applications where the 3 A current limit is acceptable.

Similar Substitute (Automotive Grade): UG54GHA0G from Taiwan Semiconductor Corporation matches the 200 V / 5 A electrical specifications with fast recovery (20 ns reverse recovery time). This part includes automotive qualification (AEC-Q101) and extended temperature range (-55°C to 175°C). Selection of this part is appropriate for automotive applications requiring enhanced reliability certification.

Parameter Comparison

Parameter	SF54-TP (Main)	SF54G-TP (Direct)	ER502_R2_00001 (Parametric)	BY251P-E3/73 (Similar)	UG54GHA0G (Similar)
Manufacturer	Micro Commercial Co	Micro Commercial Co	Panjit International Inc.	Vishay General Semiconductor	Taiwan Semiconductor Corporation
Product Status	Obsolete	Active	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V	200 V
Current - Average Rectified (Io)	5 A	5 A	5 A	3 A	5 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 5 A	950 mV @ 5 A	950 mV @ 5 A	1.1 V @ 3 A	1.05 V @ 5 A
Reverse Recovery Time (trr)	35 ns	35 ns	35 ns	3 µs	20 ns
Current - Reverse Leakage @ Vr	5 µA @ 200 V	5 µA @ 200 V	1 µA @ 200 V	5 µA @ 200 V	10 µA @ 200 V
Speed Classification	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Standard Recovery > 500ns	Fast Recovery ≤ 500ns
Package / Case	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature - Junction	-55°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 175°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Bulk	Tape & Reel (TR)	Cut Tape (CT)	Bulk	Bulk

Engineering Selection Recommendations

For Direct Replacement (Preferred): SF54G-TP is the primary substitute for SF54-TP applications. This part maintains identical electrical specifications and mechanical compatibility while offering active product status and ongoing availability. The transition from bulk to Tape & Reel packaging does not affect electrical performance and may provide procurement advantages through automated assembly compatibility.

For Parametric Equivalence: ER502_R2_00001 provides an alternative source with identical electrical performance and superior reverse leakage characteristics (1 µA versus 5 µA at 200 V). This part is suitable for applications where lower leakage current provides design margin. Cut Tape packaging is compatible with standard component handling and assembly processes.

For Current-Limited Applications: BY251P-E3/73 is applicable only in circuits where the maximum current requirement does not exceed 3 A. The standard recovery characteristic (3 µs) and higher forward voltage (1.1 V @ 3 A) result in increased power dissipation compared to the SF54-TP. This part is not suitable for applications requiring the full 5 A rating or fast recovery performance.

For Automotive Applications: UG54GHA0G is specified for designs requiring automotive-grade components with AEC-Q101 qualification. The extended temperature range (-55°C to 175°C) and faster reverse recovery time (20 ns) provide enhanced performance margin. Selection of this part is driven by application requirements for automotive reliability certification rather than general-purpose rectification needs.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and are classified as REACH Unaffected (where specified). The SF54-TP, SF54G-TP, and ER502_R2_00001 share identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications, ensuring consistent export and tariff treatment.

Frequently Asked Questions (FAQ)

Q: Can SF54G-TP be used as a direct replacement for SF54-TP in existing designs?

A: Yes. SF54G-TP is electrically and mechanically identical to SF54-TP. The only difference is packaging format (Tape & Reel versus bulk). Both parts share the same 200 V reverse voltage, 5 A current rating, 950 mV forward voltage, and 35 ns reverse recovery time. Printed circuit board layouts and thermal management designs require no modification.

Q: What is the difference between ER502_R2_00001 and SF54G-TP?

A: Both parts are parametric equivalents with identical electrical specifications. The primary differences are manufacturer (Panjit versus Micro Commercial Co), packaging format (Cut Tape versus Tape & Reel), and reverse leakage current (1 µA versus 5 µA at 200 V). ER502_R2_00001 offers lower leakage, which may provide additional design margin in high-impedance circuits.

Q: Is BY251P-E3/73 suitable for applications currently using SF54-TP?

A: BY251P-E3/73 is suitable only if the application circuit operates at 3 A or below. This part is not recommended for circuits requiring the full 5 A rating. Additionally, the standard recovery characteristic (3 µs versus 35 ns) and higher forward voltage (1.1 V @ 3 A versus 950 mV @ 5 A) result in increased switching losses and power dissipation. Thermal analysis is required before substitution.

Q: When should UG54GHA0G be selected over other substitutes?

A: UG54GHA0G is selected for automotive applications requiring AEC-Q101 qualification. The extended temperature range (-55°C to 175°C) and faster reverse recovery time (20 ns) provide performance advantages in high-temperature automotive environments. General-purpose industrial applications do not require this part unless automotive-grade certification is a design requirement.

Q: Are all substitute parts available in the same DO-201AD package?

A: Yes. All substitute parts listed (SF54G-TP, ER502_R2_00001, BY251P-E3/73, and UG54GHA0G) use the DO-201AD axial through-hole package. Printed circuit board footprints and lead spacing are identical across all parts. No layout modifications are required for package compatibility.

Q: What is the significance of the reverse recovery time difference between SF54-TP and UG54GHA0G?

A: SF54-TP has a reverse recovery time of 35 ns, while UG54GHA0G has 20 ns. Faster reverse recovery reduces switching losses and electromagnetic interference in high-frequency rectification circuits. For applications operating below 100 kHz, this difference has negligible impact. High-frequency switching applications benefit from the faster recovery of UG54GHA0G.

Q: Can ER502_R2_00001 be used in high-impedance sensing circuits?

A: Yes. ER502_R2_00001 features lower reverse leakage current (1 µA @ 200 V) compared to SF54-TP (5 µA @ 200 V). This characteristic is advantageous in precision rectification and high-impedance measurement circuits where leakage current introduces measurement error. The lower leakage provides improved circuit performance in these applications.

Q: What packaging considerations apply when transitioning from bulk to Tape & Reel format?

A: Tape & Reel packaging (SF54G-TP) is compatible with automated component placement equipment and reduces manual handling. Cut Tape packaging (ER502_R2_00001) provides intermediate flexibility between bulk and full reel quantities. Both formats are suitable for standard assembly processes. No electrical or thermal performance differences exist between packaging formats.

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