SS23S-M3/5AT Equivalent & Substitute Parts

Part Overview

The SS23S-M3/5AT is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 30 V DC reverse voltage and 2 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active and fully compliant with RoHS3 and REACH regulations. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility is required while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	500	mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	400	µA @ 30 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-65 to 125	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SS23S-M3/5AT is determined by strict equivalence in the following critical parameters:

Primary Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 30 V
Current - Average Rectified (Io): 2 A
Technology: Schottky
Mounting Type: Surface Mount
Package / Case: DO-214AC, SMA

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: ≤ 500 mV @ 2 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction: Minimum -65°C to maximum ≥ 125°C
RoHS3 Compliance and MSL Level 1

Parts are grouped into two categories:

Full Equivalents (2 A rated current): Parts meeting all primary criteria with identical 2 A current rating. These provide direct functional replacement with no circuit redesign required.

Partial Substitutes (1 A rated current): Parts meeting voltage, package, and technology criteria but with reduced current rating (1 A instead of 2 A). These are suitable only for applications where the actual circuit current demand does not exceed 1 A, regardless of the original design specification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Max)	Product Status	Package
SS23S-M3/5AT	Vishay General Semiconductor	30 V	2 A	500 mV @ 2 A	400 µA @ 30 V	125°C	Active	DO-214AC (SMA)
B230A-13-F	Diodes Incorporated	30 V	2 A	500 mV @ 2 A	500 µA @ 30 V	150°C	Active	DO-214AC (SMA)
RBR2L30ATE25	Rohm Semiconductor	30 V	2 A	490 mV @ 2 A	80 µA @ 30 V	150°C	Not For New Designs	DO-214AC (SMA)
STPS1L30A	STMicroelectronics	30 V	1 A	395 mV @ 1 A	200 µA @ 30 V	150°C	Active	DO-214AC (SMA)
STPS2L30A	STMicroelectronics	30 V	2 A	450 mV @ 2 A	200 µA @ 30 V	150°C	Active	DO-214AC (SMA)
STPS130A	STMicroelectronics	30 V	1 A	550 mV @ 1 A	10 µA @ 30 V	150°C	Active	DO-214AC (SMA)

Engineering Selection Recommendations

Recommended Full Equivalents (2 A Current Rating):

B230A-13-F (Diodes Incorporated) is the primary recommended substitute. This part maintains identical voltage and current specifications with matching forward voltage characteristics. Product status is Active, ensuring long-term availability and supply chain stability. Operating temperature maximum of 150°C exceeds the original specification, providing thermal margin. RoHS3 compliance and MSL Level 1 certification match the original part.

STPS2L30A (STMicroelectronics) is an alternative full equivalent with Active product status. Forward voltage is 450 mV @ 2 A, which is 50 mV lower than the original specification, indicating improved efficiency characteristics. Operating temperature maximum of 150°C and full RoHS3 compliance support long-term design viability.

Conditional Substitute (2 A Current Rating, Not For New Designs):

RBR2L30ATE25 (Rohm Semiconductor) meets all electrical specifications with superior reverse leakage characteristics (80 µA versus 400 µA). However, product status is classified as "Not For New Designs," indicating this part is in end-of-life phase. This part is suitable only for legacy system maintenance or repair applications where the original part number must be replaced in existing inventory.

Partial Substitutes (1 A Current Rating):

STPS1L30A (STMicroelectronics) and STPS130A (STMicroelectronics) are rated for 1 A average rectified current. These parts are suitable only for applications where actual circuit current does not exceed 1 A. Forward voltage characteristics differ: STPS1L30A provides 395 mV @ 1 A (lower loss), while STPS130A provides 550 mV @ 1 A (higher loss). Both maintain 30 V reverse voltage rating and Active product status. Selection between these two depends on thermal and efficiency requirements of the specific application.

Frequently Asked Questions (FAQ)

Q: Can B230A-13-F be used as a direct replacement for SS23S-M3/5AT?

A: Yes. B230A-13-F is a full electrical and mechanical equivalent. Both parts are rated 30 V / 2 A, use identical DO-214AC (SMA) packaging, and meet the same fast recovery speed specification. Forward voltage is identical at 500 mV @ 2 A. Both are RoHS3 compliant with MSL Level 1. The higher operating temperature rating (150°C versus 125°C) of B230A-13-F provides additional thermal margin.

Q: What is the difference between STPS2L30A and STPS1L30A?

A: The primary difference is current rating: STPS2L30A is rated 2 A while STPS1L30A is rated 1 A. Both maintain 30 V reverse voltage and DO-214AC (SMA) packaging. Forward voltage differs: STPS2L30A is 450 mV @ 2 A, while STPS1L30A is 395 mV @ 1 A. STPS2L30A is a full equivalent to SS23S-M3/5AT. STPS1L30A is suitable only for circuits where actual current demand does not exceed 1 A.

Q: Why is RBR2L30ATE25 marked "Not For New Designs"?

A: This designation indicates the part is in end-of-life phase and manufacturer support is being discontinued. While the part meets all electrical specifications and is currently in stock, it is not recommended for new product designs. RBR2L30ATE25 is appropriate only for replacement of failed units in existing systems or for maintenance of legacy equipment.

Q: Can STPS130A or STPS1L30A be used in a 2 A application?

A: No. These parts are rated for maximum 1 A average rectified current. Using them in a 2 A application exceeds the component rating and results in excessive junction temperature, reduced reliability, and potential device failure. These parts are suitable only for applications where actual circuit current does not exceed 1 A.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (B230A-13-F, RBR2L30ATE25, STPS1L30A, STPS2L30A, STPS130A) are RoHS3 compliant with MSL Level 1 moisture sensitivity rating, matching the original SS23S-M3/5AT specification.

Q: What is the significance of the DO-214AC (SMA) package designation?

A: DO-214AC and SMA are equivalent package designations for the same surface mount form factor. All listed parts use this identical package, ensuring mechanical compatibility with existing PCB layouts, solder pads, and assembly processes. No PCB redesign is required when substituting between these parts.

Q: How do forward voltage differences affect circuit performance?

A: Forward voltage (Vf) determines the voltage drop across the diode during conduction. Lower Vf results in reduced power dissipation and heat generation. For example, STPS2L30A at 450 mV @ 2 A dissipates less power than SS23S-M3/5AT at 500 mV @ 2 A. STPS1L30A at 395 mV @ 1 A has the lowest forward voltage but is limited to 1 A applications. Selection depends on thermal budget and efficiency requirements of the specific circuit.

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

A: This specification indicates the diode switching speed during reverse recovery. All listed parts meet this criterion, ensuring they operate correctly in high-frequency switching applications. Recovery time of 500 nanoseconds or less allows the diode to transition from conducting to blocking state rapidly, minimizing switching losses and electromagnetic interference.

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