MBR4015LWT Equivalent & Substitute Parts

Part Overview

The MBR4015LWT is a Schottky diode array manufactured by onsemi, configured as 1 pair common cathode with 15 V reverse voltage rating and 20 A average rectified current per diode. The device is packaged in TO-247-3 through-hole format and operates across a junction temperature range of -55°C to 150°C. The MBR4015LWT is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available product status and compliance certifications.

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)
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-247-3

Substitute Part Grouping Explanation

Substitute parts for the MBR4015LWT are classified into three categories based on electrical and mechanical compatibility:

Direct Manufacturer Equivalent: Parts that maintain identical electrical specifications and are manufactured by the same supplier. These parts satisfy all primary electrical parameters: 15 V reverse voltage, 20 A average rectified current per diode, 420 mV forward voltage at 20 A, and fast recovery speed characteristics. Packaging remains TO-247-3 through-hole configuration.

Similar Cross-Manufacturer Substitutes: Parts from alternative manufacturers that maintain core electrical specifications (15 V reverse voltage, 20 A average rectified current per diode, fast recovery speed) and identical package format. These parts may exhibit minor variations in forward voltage characteristics or reverse leakage current within acceptable engineering tolerances. All maintain TO-247-3 through-hole mounting.

Parametric Equivalents with Elevated Current Rating: Parts that exceed the 20 A specification while maintaining 15 V reverse voltage and identical package format. These parts provide enhanced current capacity and are suitable for applications requiring higher current margins.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Reverse Leakage @ Vr	Tj (Operating)	Package	Product Status	RoHS Status
MBR4015LWT	onsemi	15 V	20 A	420 mV @ 20 A	5 mA @ 15 V	-55°C ~ 150°C	TO-247-3	Obsolete	RoHS non-compliant
MBR4015LWTG	onsemi	15 V	20 A	420 mV @ 20 A	5 mA @ 15 V	-55°C ~ 150°C	TO-247-3	Active	ROHS3 Compliant
STPS40L15CW	Vishay General Semiconductor - Diodes Division	15 V	20 A	410 mV @ 19 A	10 mA @ 15 V	-55°C ~ 125°C	TO-247-3	Obsolete	RoHS non-compliant
DSSK40-0015B	IXYS	15 V	20 A	440 mV @ 20 A	10 mA @ 15 V	-55°C ~ 150°C	TO-247-3	Active	ROHS3 Compliant
DSSK70-0015B	IXYS	15 V	35 A	450 mV @ 35 A	20 mA @ 15 V	-55°C ~ 150°C	TO-247-3	Active	ROHS3 Compliant
VS-40L15CW-N3	Vishay General Semiconductor - Diodes Division	15 V	20 A	520 mV @ 40 A	10 mA @ 15 V	-55°C ~ 125°C	TO-247-3	Active	ROHS3 Compliant
VS-MBR40L15CW-N3	Vishay General Semiconductor - Diodes Division	15 V	20 A	420 mV @ 20 A	10 mA @ 15 V	-55°C ~ 125°C	TO-247-3	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - Direct Equivalent: MBR4015LWTG is the direct successor to MBR4015LWT, manufactured by onsemi with identical electrical specifications and TO-247-3 packaging. This part maintains 15 V reverse voltage, 20 A average rectified current per diode, and 420 mV forward voltage at 20 A. MBR4015LWTG carries Active product status and ROHS3 compliance, providing long-term availability and regulatory alignment.

Secondary Recommendation - Cross-Manufacturer Substitute: DSSK40-0015B (IXYS) provides electrical equivalence with 15 V reverse voltage and 20 A average rectified current per diode in TO-247-3 package. Forward voltage is 440 mV at 20 A, representing a 20 mV increase from the original specification. DSSK40-0015B maintains Active product status and ROHS3 compliance. Operating temperature range extends to 150°C, matching the original part.

Alternative with Enhanced Current Capacity: DSSK70-0015B (IXYS) maintains 15 V reverse voltage in TO-247-3 package with elevated 35 A average rectified current per diode. This part is suitable for applications requiring current margin above the 20 A specification. DSSK70-0015B carries Active product status and ROHS3 compliance with -55°C to 150°C operating range.

Compliance Consideration: All recommended active substitutes carry ROHS3 compliance certification, addressing regulatory requirements for new designs. The original MBR4015LWT and STPS40L15CW are RoHS non-compliant and obsolete, necessitating transition to compliant alternatives.

Frequently Asked Questions (FAQ)

Q: Can MBR4015LWTG directly replace MBR4015LWT without circuit modification?

A: Yes. MBR4015LWTG maintains identical electrical specifications: 15 V reverse voltage, 20 A average rectified current per diode, 420 mV forward voltage at 20 A, and fast recovery speed characteristics. Both use TO-247-3 through-hole packaging. The primary difference is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the impact of forward voltage variation between substitute parts?

A: Forward voltage variations are within acceptable engineering tolerances for Schottky diode arrays. STPS40L15CW exhibits 410 mV at 19 A, DSSK40-0015B exhibits 440 mV at 20 A, and VS-40L15CW-N3 exhibits 520 mV at 40 A. These variations affect power dissipation and thermal performance. Applications with tight thermal budgets should account for forward voltage differences when selecting substitutes.

Q: Is DSSK70-0015B suitable for 20 A applications?

A: Yes. DSSK70-0015B is rated for 35 A average rectified current per diode, exceeding the 20 A requirement. The part maintains 15 V reverse voltage and TO-247-3 packaging. Higher current rating provides operational margin and does not create incompatibility with 20 A circuit requirements.

Q: What is the significance of operating temperature range differences?

A: MBR4015LWT operates from -55°C to 150°C. STPS40L15CW and VS-40L15CW-N3 operate from -55°C to 125°C, representing a 25°C reduction in maximum junction temperature. Applications requiring operation above 125°C must use MBR4015LWTG, DSSK40-0015B, or DSSK70-0015B to maintain specification compliance.

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

A: Yes. All substitute parts use TO-247-3 through-hole package format, maintaining identical PCB footprint and mounting requirements. Supplier device package designations vary (TO-247-3, TO-247AC, TO-247AD) but represent equivalent physical and electrical interfaces.

Q: What is the reverse leakage current difference between parts?

A: MBR4015LWT specifies 5 mA reverse leakage at 15 V. Cross-manufacturer substitutes (STPS40L15CW, DSSK40-0015B, VS-40L15CW-N3, VS-MBR40L15CW-N3) specify 10 mA reverse leakage at 15 V. DSSK70-0015B specifies 20 mA reverse leakage at 15 V. Higher reverse leakage increases standby power dissipation and should be evaluated for low-power or precision applications.

Q: Does RoHS compliance affect electrical performance?

A: RoHS compliance addresses material composition and manufacturing processes but does not alter electrical performance specifications. ROHS3-compliant parts (MBR4015LWTG, DSSK40-0015B, DSSK70-0015B, VS-40L15CW-N3, VS-MBR40L15CW-N3) maintain identical electrical characteristics to their non-compliant predecessors while meeting regulatory requirements for new designs and procurement.

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