VS-MBR340 Equivalent & Substitute Parts

Part Overview

The VS-MBR340 is a 40 V, 3 A Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division in a through-hole C-16 package configuration. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production applications. The part operates across a junction temperature range of -40°C to 150°C and demonstrates fast recovery characteristics suitable for rectification and switching applications requiring low forward voltage drop.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	600 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	600 µA @ 40 V	µA
Mounting Type	Through Hole	—
Operating Temperature - Junction	-40°C ~ 150°C	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the VS-MBR340 is determined by the following critical parameters:

Primary Electrical Criteria:

Voltage - DC Reverse (Vr) (Max): Minimum 40 V
Current - Average Rectified (Io): Minimum 3 A
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Secondary Electrical Criteria:

Voltage - Forward (Vf) (Max) @ If: ≤ 600 mV @ 3 A
Current - Reverse Leakage @ Vr: ≤ 600 µA @ 40 V

Mechanical & Environmental Criteria:

Mounting Type: Through Hole
Operating Temperature - Junction: Minimum -40°C to 150°C upper limit
Package / Case: Axial configuration

Substitute parts meeting or exceeding these parameters across all categories are electrically and mechanically compatible with the VS-MBR340 in circuit applications. Parts with higher voltage ratings (60 V) remain functionally compatible as they operate within the same current and thermal specifications while providing additional voltage margin.

Parameter Comparison

Parameter	VS-MBR340	SB340-E3/54	1N5822	1N5822-TP	STPS3L60Q	STPS3L60QRL
Manufacturer	Vishay	Vishay	Microchip	Micro Commercial Co	STMicroelectronics	STMicroelectronics
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V	40 V	60 V	60 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	600 mV @ 3 A	490 mV @ 3 A	500 mV @ 3 A	525 mV @ 3 A	620 mV @ 3 A	620 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	600 µA @ 40 V	500 µA @ 40 V	100 µA @ 40 V	500 µA @ 40 V	60 µA @ 60 V	60 µA @ 60 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-201AD, Axial	DO-201AD, Axial	B, Axial	DO-201AD, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial
Operating Temperature - Junction	-40°C ~ 150°C	-65°C ~ 125°C	-65°C ~ 125°C	-55°C ~ 125°C	150°C (Max)	150°C (Max)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: SB340-E3/54

The SB340-E3/54 manufactured by Vishay General Semiconductor - Diodes Division is the direct electrical and mechanical equivalent to the VS-MBR340. This part maintains identical voltage and current ratings (40 V, 3 A) with improved forward voltage characteristics (490 mV vs. 600 mV @ 3 A) and lower reverse leakage current (500 µA vs. 600 µA @ 40 V). The SB340-E3/54 is active in production status and ROHS3 compliant. Package compatibility is confirmed through DO-201AD, Axial configuration. This substitute is available in Cut Tape (CT) and Tape & Reel (TR) packaging options.

Secondary Recommendation: 1N5822-TP

The 1N5822-TP manufactured by Micro Commercial Co provides electrical equivalence with identical 40 V, 3 A specifications and fast recovery characteristics. Forward voltage is 525 mV @ 3 A, within acceptable tolerance of the original specification. This part is active in production, ROHS3 compliant, and available in DO-201AD, Axial package configuration. Operating temperature range extends to -55°C minimum, meeting the original -40°C specification.

Alternative Recommendation: 1N5822

The 1N5822 manufactured by Microchip Technology meets all electrical specifications with superior reverse leakage performance (100 µA @ 40 V). This part is active in production but carries RoHS non-compliant status. The package configuration is B, Axial, which differs from the original DO-201AD designation. This substitute is suitable for applications where RoHS compliance is not required.

Higher Voltage Alternative: STPS3L60Q and STPS3L60QRL

The STPS3L60Q and STPS3L60QRL manufactured by STMicroelectronics provide 60 V reverse voltage rating with identical 3 A current capacity. These parts are active in production and ROHS3 compliant. The higher voltage rating provides additional circuit margin while maintaining fast recovery characteristics. Package configuration is DO-15 (DO-204AC), Axial. Forward voltage is 620 mV @ 3 A, slightly elevated from the original specification. These parts are suitable for applications requiring enhanced voltage headroom.

Frequently Asked Questions (FAQ)

Q: Can the SB340-E3/54 directly replace the VS-MBR340 without circuit modification?

A: Yes. The SB340-E3/54 maintains identical voltage (40 V) and current (3 A) ratings with improved electrical characteristics. The forward voltage is lower (490 mV vs. 600 mV @ 3 A), resulting in reduced power dissipation. No circuit modifications are required for direct substitution.

Q: What is the difference between the 1N5822 and 1N5822-TP?

A: Both parts share the same electrical specifications (40 V, 3 A, Schottky technology). The primary differences are packaging format and compliance status. The 1N5822-TP is supplied in Cut Tape (CT) format and is ROHS3 compliant, while the standard 1N5822 is supplied in bulk and is RoHS non-compliant. The 1N5822-TP also specifies capacitance (200 pF @ 4V, 1MHz).

Q: Why are the STPS3L60Q and STPS3L60QRL listed as substitutes if they have 60 V ratings instead of 40 V?

A: Higher voltage ratings are functionally compatible in applications designed for lower voltages. The 60 V rating provides additional reverse voltage margin without affecting forward conduction characteristics or current capacity. Both parts maintain the required 3 A current rating and fast recovery speed. The higher voltage rating does not create incompatibility; it extends the safe operating range.

Q: Are there package compatibility concerns when substituting the VS-MBR340?

A: The VS-MBR340 uses a C-16 package designation (DO-201AD, Axial). The SB340-E3/54 and 1N5822-TP use identical DO-201AD, Axial packages and are directly compatible. The 1N5822 uses a B, Axial package, which is mechanically similar but may require board layout verification. The STPS3L60Q and STPS3L60QRL use DO-15 (DO-204AC), Axial packages, which are smaller and require PCB footprint adjustment.

Q: Which substitute offers the best reverse leakage performance?

A: The 1N5822 manufactured by Microchip Technology provides the lowest reverse leakage current at 100 µA @ 40 V, compared to 600 µA for the original VS-MBR340. The STPS3L60Q and STPS3L60QRL also provide excellent leakage performance at 60 µA @ 60 V. Selection depends on application requirements and RoHS compliance mandates.

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

A: RoHS compliance status depends on application requirements and regulatory jurisdiction. The SB340-E3/54, 1N5822-TP, STPS3L60Q, and STPS3L60QRL are all ROHS3 compliant. The 1N5822 is RoHS non-compliant. For applications subject to RoHS regulations, select from the compliant alternatives.

Q: What is the operating temperature difference between the VS-MBR340 and its substitutes?

A: The VS-MBR340 operates from -40°C to 150°C. The SB340-E3/54 and 1N5822 operate from -65°C to 125°C, providing lower temperature capability but reduced upper temperature limit. The 1N5822-TP operates from -55°C to 125°C. The STPS3L60Q and STPS3L60QRL specify 150°C maximum junction temperature. For applications requiring the full -40°C to 150°C range, verify substitute specifications against design requirements.

Q: Can multiple substitutes be used interchangeably in the same production run?

A: All listed substitutes meet the core electrical specifications (40 V minimum, 3 A, Schottky, fast recovery). However, differences in forward voltage, reverse leakage, and package configuration may affect circuit performance and PCB layout. Standardization on a single substitute part number is recommended for production consistency and supply chain management.

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