SS25-E3/5BT Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS25-E3/5BT is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 50V DC reverse voltage and 2A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance is required due to component availability, supply chain constraints, or design flexibility needs while maintaining circuit functionality within specified operating parameters.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	700 mV @ 2 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	400	µA @ 50 V
Operating Temperature - Junction	-65 to 125	°C
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SS25-E3/5BT are categorized based on electrical parameter compatibility within the Schottky diode rectifier category. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) rating must equal or exceed 50V
Current - Average Rectified (Io) must equal or exceed 2A
Package / Case must be DO-214AA or SMB compatible
Mounting Type must be Surface Mount
Technology must be Schottky
Speed classification must be Fast Recovery (≤ 500ns, > 200mA)

Substitution Categories:

Direct Parametric Equivalents: Parts with identical voltage and current ratings (50V, 2A) from the same or different manufacturers.

Upgraded Performance Substitutes: Parts with equal or higher voltage ratings and equal or higher current ratings, allowing direct replacement with maintained or improved circuit performance.

Restricted Substitutes: Parts with lower voltage or current ratings that do not meet minimum circuit requirements and are not suitable for direct replacement.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Tj (Max) [°C]	Package	Product Status
SS25-E3/5BT	Vishay	50	2	700 @ 2A	400 @ 50V	125	DO-214AA, SMB	Active
SS25-E3/52T	Vishay	50	2	700 @ 2A	400 @ 50V	125	DO-214AA, SMB	Active
B250-13-F	Diodes Incorporated	50	2	700 @ 2A	500 @ 50V	150	DO-214AA, SMB	Active
SK35B-LTP	Micro Commercial Co	50	3	750 @ 3A	500 @ 50V	150	DO-214AA, HSMB	Not For New Designs
STPS3L60U	STMicroelectronics	60	3	620 @ 3A	150 @ 60V	150	DO-214AA, SMB	Active
STPS140U	STMicroelectronics	40	1	550 @ 1A	12 @ 40V	150	DO-214AA, SMB	Active
STPS1L40U	STMicroelectronics	40	1	500 @ 1A	35 @ 40V	150	DO-214AA, SMB	Active
STPS1L40UY	STMicroelectronics	40	1	500 @ 1A	35 @ 40V	150	DO-214AA, SMB	Active
STPS2L40U	STMicroelectronics	40	2	430 @ 2A	220 @ 40V	150	DO-214AA, SMB	Active
STPS340U	STMicroelectronics	40	3	630 @ 3A	20 @ 40V	150	DO-214AA, SMB	Active
STPS340UY	STMicroelectronics	40	3	630 @ 3A	20 @ 40V	150	DO-214AA, SMB	Active

Engineering Selection Recommendations

Tier 1 - Direct Parametric Equivalents (Preferred for Direct Replacement):

SS25-E3/52T (Vishay) is a direct parametric equivalent with identical electrical specifications (50V, 2A, 700mV forward voltage, 400µA reverse leakage). Both parts share the same base product number (SS25) and are manufactured by Vishay. This part is Active status and suitable for direct substitution without circuit redesign.

B250-13-F (Diodes Incorporated) meets the minimum electrical requirements with 50V, 2A ratings and identical forward voltage specification. This part is Active status and ROHS3 compliant. The reverse leakage specification (500µA @ 50V) is slightly elevated compared to the main part but remains within acceptable Schottky diode performance ranges. Operating temperature range extends to 150°C maximum junction temperature.

Tier 2 - Upgraded Performance Substitutes (Suitable with Circuit Verification):

STPS3L60U (STMicroelectronics) provides upgraded voltage rating (60V) and current rating (3A), exceeding the 50V, 2A requirements. This part is Active status and offers improved reverse leakage performance (150µA @ 60V). The lower forward voltage (620mV @ 3A) may reduce power dissipation in the application. Package compatibility is confirmed as DO-214AA, SMB.

SK35B-LTP (Micro Commercial Co) provides upgraded current rating (3A) at the same 50V voltage specification. This part carries "Not For New Designs" product status, limiting its suitability for new circuit development. The forward voltage specification (750mV @ 3A) is slightly elevated. This part is retained in the substitute list based on the provided input data but should not be selected for new designs.

Tier 3 - Restricted Substitutes (Not Suitable for Direct Replacement):

STPS140U, STPS1L40U, STPS1L40UY, STPS2L40U, STPS340U, and STPS340UY all feature 40V maximum reverse voltage ratings, which fall below the 50V requirement of the main part. These parts do not meet the minimum voltage specification and are not suitable for direct replacement in circuits designed for 50V operation.

Compliance and Certification:

All recommended substitute parts maintain ROHS3 compliance and are classified as Active product status, except SK35B-LTP which is marked "Not For New Designs." All parts feature Moisture Sensitivity Level 1 (Unlimited) and are REACH Unaffected.

Frequently Asked Questions (FAQ)

Q: Can SS25-E3/52T be used as a direct replacement for SS25-E3/5BT?

A: Yes. SS25-E3/52T is a direct parametric equivalent with identical voltage (50V), current (2A), forward voltage (700mV @ 2A), and reverse leakage (400µA @ 50V) specifications. Both parts are manufactured by Vishay, share the same base product number (SS25), and use the same DO-214AA, SMB package. No circuit modifications are required.

Q: Is B250-13-F compatible with SS25-E3/5BT?

A: Yes. B250-13-F meets the critical electrical parameters with 50V reverse voltage and 2A average rectified current ratings. Forward voltage specification is identical at 700mV @ 2A. The reverse leakage is slightly higher (500µA @ 50V versus 400µA @ 50V), which is within acceptable Schottky diode performance variation. Package compatibility is confirmed as DO-214AA, SMB. This part is suitable for direct substitution.

Q: Why are STPS140U, STPS1L40U, STPS1L40UY, STPS2L40U, STPS340U, and STPS340UY listed if they cannot replace the SS25-E3/5BT?

A: These parts are included in the substitute list as provided in the input data. However, their 40V maximum reverse voltage rating is below the 50V requirement of the main part. These parts are not suitable for circuits designed for 50V operation and should not be selected as replacements for the SS25-E3/5BT.

Q: Can STPS3L60U be used instead of SS25-E3/5BT?

A: Yes, with circuit verification. STPS3L60U provides upgraded specifications with 60V reverse voltage (exceeding the 50V requirement) and 3A current rating (exceeding the 2A requirement). The forward voltage is lower (620mV @ 3A), which may reduce power dissipation. Package compatibility is confirmed as DO-214AA, SMB. This part is Active status and suitable for applications where the higher voltage and current ratings do not create design conflicts.

Q: What is the difference between STPS1L40UY and STPS1L40U?

A: Both parts have identical electrical specifications (40V, 1A, 500mV forward voltage, 35µA reverse leakage). STPS1L40UY is classified as Automotive grade with AEC-Q101 qualification and operates over -40°C to 150°C junction temperature range. STPS1L40U operates over a standard temperature range to 150°C maximum. However, both parts have 40V voltage ratings, which are below the 50V requirement of the main part, making them unsuitable for direct replacement.

Q: Is SK35B-LTP recommended for new designs?

A: No. SK35B-LTP carries "Not For New Designs" product status. While it provides a 3A current rating at 50V voltage specification, its obsolescence status makes it unsuitable for new circuit development. Active alternatives such as B250-13-F or STPS3L60U should be selected instead.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in the substitute comparison table are ROHS3 compliant and REACH Unaffected, matching the compliance status of the main part SS25-E3/5BT.

Q: What is the significance of the DO-214AA, SMB package designation?

A: DO-214AA and SMB refer to the same surface mount package format. All substitute parts use this standardized package, ensuring mechanical and electrical compatibility with PCB layouts designed for the SS25-E3/5BT. Package compatibility is a critical requirement for direct substitution.

Q: How does forward voltage affect circuit performance?

A: Forward voltage (Vf) determines the voltage drop across the diode during conduction. Lower forward voltage reduces power dissipation and heat generation. The SS25-E3/5BT specifies 700mV @ 2A. Substitute parts with lower forward voltage (such as STPS3L60U at 620mV @ 3A) may improve efficiency, while parts with higher forward voltage increase power loss. Circuit design must account for these differences in voltage drop calculations.

Q: What does "Fast Recovery ≤ 500ns, > 200mA (Io)" mean?

A: This specification indicates the diode's switching speed classification. Fast recovery time (≤ 500ns) means the diode transitions from conducting to blocking state within 500 nanoseconds when current exceeds 200mA. This parameter is critical for high-frequency switching applications. All listed substitute parts maintain this fast recovery specification, ensuring compatibility in switching circuits.

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