SK25A M2G Equivalent & Substitute Parts

Part Overview

The SK25A M2G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 2 A average rectified current in a DO-214AC (SMA) surface mount package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	700 mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 50 V
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SK25A M2G is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 50 V
Package / Case: DO-214AC, SMA (surface mount)
Technology: Schottky
Mounting Type: Surface Mount

Current Rating Considerations: Substitute parts are grouped into two categories based on average rectified current (Io):

Direct Current Equivalents (2 A rating): Parts with Io = 2 A provide identical current handling capacity and forward voltage characteristics at rated current.
Reduced Current Substitutes (1 A rating): Parts with Io = 1 A operate at lower current capacity. These are suitable only when circuit design permits operation at reduced current levels.
Elevated Current Substitutes (3 A rating): Parts with Io = 3 A exceed the original specification and are suitable for applications requiring higher current capacity within the same voltage class.

Secondary Compatibility Parameters:

Forward voltage (Vf) at rated current
Reverse leakage current
Operating temperature range
RoHS and REACH compliance status

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Status	Ir @ Vr	Tj (Operating)
SK25A M2G	Taiwan Semiconductor Corporation	50 V	2 A	700 mV @ 2 A	DO-214AC, SMA	Discontinued	500 µA @ 50 V	-55°C ~ 150°C
B150-13-F	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	DO-214AC, SMA	Active	500 µA @ 50 V	-65°C ~ 150°C
B150-E3/5AT	Vishay General Semiconductor - Diodes Division	50 V	1 A	750 mV @ 1 A	DO-214AC, SMA	Active	200 µA @ 50 V	-65°C ~ 150°C
B150-E3/61T	Vishay General Semiconductor - Diodes Division	50 V	1 A	750 mV @ 1 A	DO-214AC, SMA	Active	200 µA @ 50 V	-65°C ~ 150°C
B150B-13-F	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	DO-214AA, SMB	Active	500 µA @ 50 V	-65°C ~ 150°C
B150Q-13-F	Diodes Incorporated	50 V	1 A	700 mV @ 1 A	DO-214AC, SMA	Active	500 µA @ 40 V	-65°C ~ 150°C
B250AQ-13-F	Diodes Incorporated	50 V	2 A	700 mV @ 2 A	DO-214AC, SMA	Active	500 µA @ 50 V	-65°C ~ 150°C
B350A-E3/5AT	Vishay General Semiconductor - Diodes Division	50 V	3 A	720 mV @ 3 A	DO-214AC, SMA	Active	200 µA @ 50 V	-55°C ~ 150°C
B350A-E3/61T	Vishay General Semiconductor - Diodes Division	50 V	3 A	720 mV @ 3 A	DO-214AC, SMA	Active	200 µA @ 50 V	-55°C ~ 150°C
BYS10-45-E3/TR	Vishay General Semiconductor - Diodes Division	45 V	1.5 A	500 mV @ 1 A	DO-214AC, SMA	Active	500 µA @ 45 V	-65°C ~ 150°C
BYS10-45-E3/TR3	Vishay General Semiconductor - Diodes Division	45 V	1.5 A	500 mV @ 1 A	DO-214AC, SMA	Active	500 µA @ 45 V	-65°C ~ 150°C

Engineering Selection Recommendations

Direct Replacement (2 A, 50 V, DO-214AC SMA):

The B250AQ-13-F from Diodes Incorporated is the primary direct replacement for the SK25A M2G. This part maintains identical voltage and current ratings, matching forward voltage characteristics at rated current, and is available in active production status with AEC-Q101 automotive qualification. The part is ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the original component.

Alternative Direct Replacement (2 A, 50 V, DO-214AC SMA):

The B350A-E3/5AT and B350A-E3/61T from Vishay General Semiconductor - Diodes Division both exceed the original current specification at 3 A while maintaining the 50 V voltage rating and DO-214AC SMA package. These parts are suitable for applications where increased current capacity is beneficial. Both are active production parts with ROHS3 compliance.

Reduced Current Substitutes (1 A, 50 V, DO-214AC SMA):

The B150-13-F, B150-E3/5AT, and B150-E3/61T are suitable only when circuit design permits operation at 1 A current capacity. The B150-13-F from Diodes Incorporated matches the original forward voltage specification (700 mV @ 1 A). The Vishay B150-E3/5AT and B150-E3/61T variants exhibit slightly elevated forward voltage (750 mV @ 1 A) but lower reverse leakage current (200 µA @ 50 V versus 500 µA @ 50 V). All three are active production parts with extended operating temperature ranges (-65°C to 150°C).

Package Variant (1 A, 50 V, DO-214AA SMB):

The B150B-13-F from Diodes Incorporated provides 1 A current capacity in a larger DO-214AA (SMB) package. This part is suitable only for applications where the larger package footprint is acceptable and current requirements do not exceed 1 A.

Automotive Grade Option (1 A, 50 V, DO-214AC SMA):

The B150Q-13-F from Diodes Incorporated is AEC-Q101 qualified for automotive applications, rated at 1 A with 50 V reverse voltage in DO-214AC SMA package. This part is suitable for automotive designs operating at reduced current levels.

Lower Voltage Alternative (1.5 A, 45 V, DO-214AC SMA):

The BYS10-45-E3/TR and BYS10-45-E3/TR3 from Vishay General Semiconductor - Diodes Division are rated for 45 V reverse voltage with 1.5 A current capacity. These parts are suitable only for applications where the 5 V reduction in reverse voltage rating is acceptable and current requirements do not exceed 1.5 A. Forward voltage is significantly lower at 500 mV @ 1 A.

Frequently Asked Questions (FAQ)

Q: Can the B150-13-F be used as a direct replacement for the SK25A M2G?

A: The B150-13-F is not a direct replacement. While it maintains the 50 V voltage rating and DO-214AC SMA package, its current rating is reduced to 1 A compared to the original 2 A specification. Use this part only if circuit design permits operation at 1 A current capacity.

Q: What is the primary advantage of the B250AQ-13-F over other substitutes?

A: The B250AQ-13-F maintains identical electrical specifications to the SK25A M2G (50 V, 2 A, 700 mV @ 2 A) in the same DO-214AC SMA package. It is in active production status with AEC-Q101 automotive qualification and ROHS3 compliance, making it the most direct functional equivalent.

Q: Are the B350A-E3/5AT and B350A-E3/61T suitable replacements?

A: Yes, both parts are suitable replacements. They exceed the original current specification at 3 A while maintaining the 50 V voltage rating and DO-214AC SMA package. These parts are appropriate for applications where increased current capacity is beneficial or required.

Q: Why do the Vishay B150-E3/5AT and B150-E3/61T have higher forward voltage than the original?

A: The B150-E3/5AT and B150-E3/61T exhibit forward voltage of 750 mV @ 1 A compared to 700 mV @ 2 A for the original SK25A M2G. This difference reflects the different current measurement points and is within normal variation for Schottky diodes. These parts also feature lower reverse leakage current (200 µA @ 50 V).

Q: Can the B150B-13-F be used in place of the SK25A M2G?

A: The B150B-13-F is not a direct replacement due to two factors: reduced current rating (1 A versus 2 A) and different package type (DO-214AA SMB versus DO-214AC SMA). Use this part only if both the reduced current capacity and larger package footprint are acceptable for the application.

Q: What is the significance of the BYS10-45-E3/TR having a lower reverse voltage rating?

A: The BYS10-45-E3/TR is rated for 45 V reverse voltage compared to the original 50 V specification. This part is suitable only for applications where the 5 V reduction in voltage rating does not compromise circuit performance or safety margins. The reduced forward voltage (500 mV @ 1 A) may provide thermal benefits in some applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant and REACH unaffected, matching the regulatory compliance status of the original SK25A M2G.

Q: Which substitute offers the best thermal performance?

A: The BYS10-45-E3/TR and BYS10-45-E3/TR3 exhibit the lowest forward voltage at 500 mV @ 1 A, which results in lower power dissipation and improved thermal performance. However, these parts are limited to 45 V reverse voltage and 1.5 A current capacity.

Q: What is the difference between B150-E3/5AT and B150-E3/61T?

A: Both parts are functionally identical in electrical specifications. The designation difference (5AT versus 61T) reflects different tape and reel packaging configurations. Selection between these variants depends on procurement and assembly equipment compatibility.

Q: Is the B150Q-13-F suitable for non-automotive applications?

A: Yes, the B150Q-13-F is suitable for non-automotive applications. The AEC-Q101 automotive qualification indicates enhanced reliability and testing standards, making it appropriate for any application requiring high reliability. However, its 1 A current rating limits use to applications not requiring the original 2 A capacity.

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