MBR40L15CW Equivalent & Substitute Parts

Part Overview

The MBR40L15CW is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration rated for 15 V DC reverse voltage and 20 A average rectified current per diode. The device is packaged in a TO-247-3 through-hole form factor and is classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts is necessary for ongoing design support, maintenance, and new production requirements.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	15 V
Current - Average Rectified (Io) (per Diode)	20 A
Voltage - Forward (Vf) (Max) @ If	420 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 mA @ 15 V
Operating Temperature - Junction	-55°C ~ 125°C
Mounting Type	Through Hole
Package / Case	TO-247-3
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MBR40L15CW is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 15 V
Current - Average Rectified (Io) (per Diode): 20 A minimum
Package / Case: TO-247-3
Mounting Type: Through Hole

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Within ±30 mV of 420 mV
Current - Reverse Leakage @ Vr: Up to 20 mA @ 15 V
Operating Temperature - Junction: Minimum -55°C to +125°C
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Substitute parts are grouped into two categories:

Parametric Equivalents: Parts that match all critical parameters and operate within acceptable variation ranges. These parts are direct functional replacements.

Manufacturer Recommended Parts: Parts that exceed the minimum current rating (35 A vs. 20 A) while maintaining all other critical parameters. These parts provide enhanced performance capability within the same package and configuration.

Parameter Comparison

Parameter	MBR40L15CW	VS-MBR40L15CW-N3	STPS40L15CW	MBR4015LWTG	DSSK70-0015B
Manufacturer	Vishay	Vishay	Vishay	onsemi	IXYS
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	15 V	15 V	15 V	15 V	15 V
Current - Average Rectified (Io) (per Diode)	20 A	20 A	20 A	20 A	35 A
Voltage - Forward (Vf) (Max) @ If	420 mV @ 20 A	420 mV @ 20 A	410 mV @ 19 A	420 mV @ 20 A	450 mV @ 35 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 mA @ 15 V	10 mA @ 15 V	10 mA @ 15 V	5 mA @ 15 V	20 mA @ 15 V
Operating Temperature - Junction	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-247-3	TO-247-3	TO-247-3	TO-247-3	TO-247-3
Product Status	Obsolete	Active	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

The VS-MBR40L15CW-N3 and MBR4015LWTG are parametric equivalents to the MBR40L15CW. Both parts maintain identical electrical specifications including 15 V reverse voltage, 20 A average rectified current, and TO-247-3 packaging. VS-MBR40L15CW-N3 is manufactured by Vishay and carries ROHS3 compliance. MBR4015LWTG is manufactured by onsemi, carries ROHS3 compliance, and features a lower reverse leakage current of 5 mA at 15 V compared to the original 10 mA specification. Both parts are in active product status with current inventory availability.

For Enhanced Performance (Manufacturer Recommended):

The DSSK70-0015B manufactured by IXYS provides a higher current rating of 35 A per diode while maintaining the 15 V reverse voltage specification and TO-247-3 package. This part is suitable for applications requiring increased current capacity within the same voltage class. The DSSK70-0015B carries ROHS3 compliance and is in active product status. The forward voltage at rated current is 450 mV at 35 A, which is acceptable for applications designed for the original 420 mV specification.

For Legacy System Support:

The STPS40L15CW is an obsolete Vishay part with identical electrical specifications to the MBR40L15CW. This part is not recommended for new designs but may be considered for legacy system maintenance where exact historical matching is required. The STPS40L15CW exhibits a forward voltage of 410 mV at 19 A, which is within acceptable variation of the original specification.

Compliance Considerations:

The original MBR40L15CW is RoHS non-compliant. For applications requiring RoHS compliance, VS-MBR40L15CW-N3, MBR4015LWTG, and DSSK70-0015B all meet ROHS3 requirements.

Frequently Asked Questions (FAQ)

Q: Can the VS-MBR40L15CW-N3 be used as a direct replacement for the MBR40L15CW?

A: Yes. The VS-MBR40L15CW-N3 is a parametric equivalent with identical electrical specifications: 15 V reverse voltage, 20 A average rectified current, 420 mV forward voltage at 20 A, and TO-247-3 package. The primary difference is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between the MBR4015LWTG and the MBR40L15CW?

A: Both parts share identical voltage and current ratings (15 V, 20 A) and TO-247-3 packaging. The MBR4015LWTG is manufactured by onsemi rather than Vishay, carries ROHS3 compliance, features a lower reverse leakage current (5 mA vs. 10 mA at 15 V), and supports a higher operating temperature range (-55°C to +150°C vs. -55°C to +125°C).

Q: Can the DSSK70-0015B replace the MBR40L15CW in all applications?

A: The DSSK70-0015B maintains the same 15 V reverse voltage and TO-247-3 package but provides a higher current rating of 35 A per diode. This part is suitable for applications where the original 20 A rating is adequate or where increased current capacity is beneficial. The forward voltage is 450 mV at 35 A, which is within acceptable variation for most applications designed for the original 420 mV specification.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts listed use the TO-247-3 through-hole package, ensuring mechanical and electrical compatibility with the original MBR40L15CW footprint.

Q: Which substitute part has the best availability?

A: The DSSK70-0015B has the highest inventory level at 10,200 pieces. The VS-MBR40L15CW-N3 has 1,021 pieces, MBR4015LWTG has 1,103 pieces, and STPS40L15CW has 1,216 pieces in stock.

Q: What is the significance of the reverse leakage current differences between substitute parts?

A: Reverse leakage current affects power dissipation and circuit performance at operating temperature. The MBR4015LWTG exhibits the lowest reverse leakage at 5 mA at 15 V, while the DSSK70-0015B exhibits the highest at 20 mA at 15 V. The original MBR40L15CW and most substitutes specify 10 mA at 15 V. Selection depends on application sensitivity to leakage current.

Q: Is RoHS compliance a factor in selecting a substitute?

A: RoHS compliance is determined by application requirements and regulatory jurisdiction. The original MBR40L15CW is RoHS non-compliant. For applications requiring RoHS compliance, VS-MBR40L15CW-N3, MBR4015LWTG, and DSSK70-0015B all meet ROHS3 requirements.

Q: Can the STPS40L15CW be used in new designs?

A: The STPS40L15CW is classified as obsolete and is not recommended for new designs. It is suitable only for legacy system maintenance where exact historical matching is required. For new designs, select from active status parts: VS-MBR40L15CW-N3, MBR4015LWTG, or DSSK70-0015B.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message