SF25-TP Equivalent & Substitute Parts

Part Overview

The SF25-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 300V DC reverse voltage and 2A average rectified current in a DO-15 through-hole package. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The SF25-TP operates across a junction temperature range of -55°C to 125°C and features fast recovery characteristics with a reverse recovery time of 35 nanoseconds.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	300	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 2	V @ A
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 300 V
Package / Case	DO-204AC, DO-15, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-55 to 125	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SF25-TP is determined by equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 300 V minimum
Current - Average Rectified (Io): 2 A minimum
Voltage - Forward (Vf) (Max) @ If: within acceptable operating range
Reverse Recovery Time (trr): fast recovery classification
Current - Reverse Leakage @ Vr: 5 µA @ 300 V or lower

Mechanical Equivalence Criteria:

Package / Case: DO-204AC or DO-15 (axial through-hole)
Mounting Type: Through Hole
Operating Temperature - Junction: range must accommodate -55°C to 125°C minimum

Compliance Criteria:

RoHS3 Compliant status
Moisture Sensitivity Level (MSL): 1 (Unlimited)

The EGP20F-E3/73 meets all substitution criteria with identical or superior electrical ratings and maintains full mechanical and thermal compatibility.

Parameter Comparison

Parameter	SF25-TP (Main Part)	EGP20F-E3/73 (Substitute)	Compatibility
Voltage - DC Reverse (Vr) (Max)	300 V	300 V	Equivalent
Current - Average Rectified (Io)	2 A	2 A	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 2 A	1.25 V @ 2 A	Substitute Superior
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Equivalent
Reverse Recovery Time (trr)	35 ns	50 ns	Substitute Acceptable
Current - Reverse Leakage @ Vr	5 µA @ 300 V	5 µA @ 300 V	Equivalent
Capacitance @ Vr, F	30 pF @ 4V, 1MHz	45 pF @ 4V, 1MHz	Substitute Acceptable
Package / Case	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Operating Temperature - Junction	-55°C to 125°C	-65°C to 150°C	Substitute Superior
Product Status	Obsolete	Active	Substitute Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent

Engineering Selection Recommendations

The EGP20F-E3/73 manufactured by Vishay General Semiconductor - Diodes Division is a direct substitute for the obsolete SF25-TP. The substitute part maintains electrical equivalence across all critical parameters: 300V reverse voltage rating, 2A average rectified current, and fast recovery characteristics.

The EGP20F-E3/73 offers the following advantages:

Product Status: Active production status ensures long-term availability and supply chain continuity, eliminating obsolescence risk associated with the SF25-TP.

Thermal Performance: Extended operating temperature range (-65°C to 150°C) provides superior thermal margin compared to the SF25-TP (-55°C to 125°C).

Forward Voltage: Lower forward voltage drop (1.25V vs. 1.3V @ 2A) results in reduced power dissipation.

Compliance: Both parts maintain ROHS3 compliance and identical moisture sensitivity classification (MSL 1 - Unlimited).

Package Compatibility: Identical DO-204AC/DO-15 axial through-hole package ensures direct mechanical and electrical substitution without circuit board modifications.

The EGP20F-E3/73 is suitable for direct replacement in all applications where the SF25-TP was specified.

Frequently Asked Questions (FAQ)

Q: Can the EGP20F-E3/73 be used as a direct replacement for the SF25-TP without circuit modifications?

A: Yes. Both diodes share identical package specifications (DO-204AC/DO-15 axial through-hole), voltage ratings (300V), and current ratings (2A). No circuit board layout or component footprint changes are required.

Q: What is the significance of the reverse recovery time difference (35ns vs. 50ns)?

A: Both diodes are classified as fast recovery devices with reverse recovery times well below 500 nanoseconds. The 15-nanosecond difference does not affect functional compatibility in standard rectification applications. The EGP20F-E3/73 remains within fast recovery specifications.

Q: Does the higher capacitance of the EGP20F-E3/73 (45pF vs. 30pF) affect circuit performance?

A: The capacitance difference of 15 picofarads is negligible in most rectification circuits. Both values are typical for general-purpose rectifier diodes in this voltage and current class. Application-specific high-frequency performance should be evaluated if operating above 1 MHz.

Q: Why is the EGP20F-E3/73 preferred over the obsolete SF25-TP?

A: The SF25-TP is classified as obsolete, creating supply chain risk. The EGP20F-E3/73 is in active production, ensuring availability for current and future applications. Additionally, the substitute offers superior thermal range and lower forward voltage characteristics.

Q: Are there alternative substitutes listed for the EGP20F-E3/73?

A: The EGP20F-E3/73 documentation references EGP20K and EGP20B as related variants within the same product family. These alternatives maintain the same electrical and mechanical specifications and may be considered based on specific supplier availability.

Q: What compliance certifications apply to both parts?

A: Both the SF25-TP and EGP20F-E3/73 are ROHS3 compliant and classified as MSL 1 (Unlimited moisture sensitivity level). Both carry ECCN EAR99 classification and HTSUS code 8541.10.0080.

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