VS-MBR340TR Schottky Diode Equivalent & Substitute Parts

Part Overview

The VS-MBR340TR is a 40V, 3A Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, packaged in DO-201AD axial configuration with C-16 supplier designation. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement continuity. The part operates across a junction temperature range of -40°C to 150°C and demonstrates fast recovery characteristics suitable for rectification applications requiring low forward voltage drop and rapid switching response.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	40	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) Maximum @ If	600 mV @ 3 A	mV
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	600 µA @ 40 V	µA
Capacitance @ Vr, F	190 pF @ 4V, 1MHz	pF
Package / Case	DO-201AD, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-40°C to 150°C	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the VS-MBR340TR is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) Maximum: 40V minimum (higher voltage ratings are acceptable for backward compatibility)
Current - Average Rectified (Io): 3A minimum (higher current ratings are acceptable)
Technology: Schottky (mandatory for forward voltage and switching characteristics)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (mandatory for application performance)
Mounting Type: Through Hole (mechanical compatibility)
Package / Case: DO-201AD or equivalent axial package (physical fit requirement)

Grouping Logic:

Group 1 - Direct Electrical & Package Equivalents (40V, 3A, DO-201AD): Parts meeting all primary criteria with identical voltage and current ratings in the same package form.

Group 2 - Higher Voltage Rating Substitutes (60V, 3A, DO-15): Parts with elevated reverse voltage rating (60V) maintaining 3A current rating. These provide enhanced voltage margin while preserving current capacity. Package differs to DO-15 (DO-204AC), requiring mechanical verification.

Group 3 - Higher Current Rating Substitutes (40V, 8A, DO-201AD): Parts with elevated current rating (8A) maintaining 40V reverse voltage in the same DO-201AD package. These provide current margin while preserving voltage rating and package compatibility.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Package / Case	Tj (Max) [°C]	Product Status	RoHS Status
VS-MBR340TR	Vishay General Semiconductor	40	3	600 @ 3A	600 @ 40V	DO-201AD, Axial	150	Obsolete	ROHS3 Compliant
SB340-E3/54	Vishay General Semiconductor	40	3	490 @ 3A	500 @ 40V	DO-201AD, Axial	125	Active	ROHS3 Compliant
1N5822	Microchip Technology	40	3	500 @ 3A	100 @ 40V	B, Axial	125	Active	RoHS Non-Compliant
1N5822-TP	Micro Commercial Co	40	3	525 @ 3A	500 @ 40V	DO-201AD, Axial	125	Active	ROHS3 Compliant
SR804HA0G	Taiwan Semiconductor Corporation	40	8	550 @ 8A	500 @ 40V	DO-201AD, Axial	125	Active	ROHS3 Compliant
STPS3L60Q	STMicroelectronics	60	3	620 @ 3A	60 @ 60V	DO-204AC, DO-15, Axial	150	Active	ROHS3 Compliant
STPS3L60QRL	STMicroelectronics	60	3	620 @ 3A	60 @ 60V	DO-204AC, DO-15, Axial	150	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Preferred):

SB340-E3/54 (Vishay General Semiconductor) is the primary direct substitute. This part maintains identical voltage (40V) and current (3A) ratings, preserves the DO-201AD axial package, and is manufactured by the original equipment supplier. The part is active with ROHS3 compliance. Forward voltage is improved (490 mV vs. 600 mV @ 3A), and reverse leakage is reduced (500 µA vs. 600 µA @ 40V). Operating temperature maximum is reduced to 125°C from 150°C; applications requiring operation above 125°C junction temperature require thermal analysis.

1N5822-TP (Micro Commercial Co) provides an alternative direct replacement with identical package (DO-201AD) and electrical ratings (40V, 3A). This part is active with ROHS3 compliance. Forward voltage (525 mV @ 3A) and reverse leakage (500 µA @ 40V) are within acceptable ranges. Operating temperature maximum is 125°C. Capacitance specification is provided (200 pF @ 4V, 1MHz), matching the original part's capacitive characteristics.

For Applications Requiring Higher Current Margin:

SR804HA0G (Taiwan Semiconductor Corporation) is suitable when circuit design permits higher current rating (8A vs. 3A) while maintaining 40V reverse voltage. This part preserves the DO-201AD axial package and is active with ROHS3 compliance. The part carries AEC-Q101 automotive qualification. Operating temperature maximum is 125°C. Forward voltage at 8A operation (550 mV) is specified; applications must account for this characteristic at actual operating current.

For Applications Requiring Higher Voltage Margin:

STPS3L60Q and STPS3L60QRL (STMicroelectronics) provide elevated reverse voltage rating (60V vs. 40V) while maintaining 3A current rating. Both parts are active with ROHS3 compliance and maximum operating temperature of 150°C. Package differs to DO-15 (DO-204AC), requiring mechanical verification for board layout compatibility. STPS3L60QRL is supplied in Tape & Reel packaging; STPS3L60Q is supplied in Cut Tape. Forward voltage is higher (620 mV @ 3A) and reverse leakage is significantly lower (60 µA @ 60V). These parts are suitable for designs where voltage stress margin is critical.

Compliance Considerations:

All recommended substitutes except 1N5822 (Microchip Technology) maintain ROHS3 compliance. The 1N5822 is RoHS non-compliant and should be selected only when legacy design requirements or specific supply chain constraints mandate its use. All parts are REACH unaffected and carry EAR99 ECCN classification.

Frequently Asked Questions (FAQ)

Q: Can SB340-E3/54 be used as a direct drop-in replacement for VS-MBR340TR?

A: SB340-E3/54 is electrically and mechanically compatible for applications operating at junction temperatures up to 125°C. The part maintains identical voltage (40V) and current (3A) ratings and uses the same DO-201AD axial package. Forward voltage performance is improved (490 mV vs. 600 mV @ 3A). If the original design operates the junction above 125°C, thermal analysis is required to confirm acceptable performance.

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

A: Both parts share the same base part number (1N5822) and electrical specifications (40V, 3A). The primary differences are: (1) Manufacturer—1N5822 is Microchip Technology (RoHS non-compliant), while 1N5822-TP is Micro Commercial Co (ROHS3 compliant); (2) Packaging—1N5822 is supplied in bulk with B axial package, while 1N5822-TP is supplied in Cut Tape with DO-201AD package; (3) Operating temperature—both are rated to 125°C maximum. For new designs, 1N5822-TP is preferred due to ROHS3 compliance and standard DO-201AD package.

Q: Why do STPS3L60Q and STPS3L60QRL have different package designations if they are the same part?

A: STPS3L60Q and STPS3L60QRL are electrically identical (60V, 3A, DO-15 package) but differ in supply packaging. STPS3L60Q is supplied in Cut Tape (CT), while STPS3L60QRL is supplied in Tape & Reel (TR). The component package (DO-15) is identical; the difference is in the carrier format for automated assembly. Selection depends on assembly process requirements.

Q: Can SR804HA0G be used in place of VS-MBR340TR in a 3A circuit?

A: SR804HA0G is electrically compatible for 3A operation. The part maintains 40V reverse voltage and DO-201AD axial package. The 8A current rating provides design margin but does not affect 3A circuit operation. Forward voltage at 3A operation is not specified; the datasheet provides 550 mV @ 8A. For precise circuit analysis, forward voltage at 3A must be obtained from the manufacturer. The part carries AEC-Q101 automotive qualification, suitable for automotive applications.

Q: What are the mechanical differences between DO-201AD and DO-15 packages?

A: Both are through-hole axial packages with two leads. DO-201AD (used by VS-MBR340TR, SB340-E3/54, 1N5822-TP, SR804HA0G) is a larger package with greater lead diameter and spacing. DO-15 (used by STPS3L60Q, STPS3L60QRL) is a smaller package. Physical dimensions differ; board layout and hole spacing must be verified before substitution. Electrical performance is not affected by package size.

Q: Is reverse leakage current a critical parameter for substitution?

A: Reverse leakage current becomes critical in applications with high impedance circuits, precision analog circuits, or circuits operating at elevated temperatures. The VS-MBR340TR specifies 600 µA @ 40V. Substitutes range from 60 µA (STPS3L60Q/STPS3L60QRL) to 600 µA (1N5822-TP). For most rectification applications, this variation is acceptable. For precision applications, verify that the substitute's reverse leakage does not degrade circuit performance.

Q: Can forward voltage differences between substitutes affect circuit performance?

A: Forward voltage differences directly affect power dissipation and voltage drop across the diode. The VS-MBR340TR specifies 600 mV @ 3A. Substitutes range from 490 mV (SB340-E3/54) to 620 mV (STPS3L60Q/STPS3L60QRL). In rectification circuits, lower forward voltage reduces power loss and heat generation. In voltage-sensitive applications, verify that the substitute's forward voltage does not exceed circuit tolerance. Power dissipation calculations should account for the actual forward voltage of the selected substitute.

Q: Why is the operating temperature range different between VS-MBR340TR and most substitutes?

A: VS-MBR340TR specifies -40°C to 150°C junction temperature range. Most active substitutes (SB340-E3/54, 1N5822, 1N5822-TP, SR804HA0G) specify -65°C to 125°C or -55°C to 125°C. The lower maximum temperature (125°C vs. 150°C) reflects current manufacturing standards and thermal design practices. For applications requiring operation above 125°C junction temperature, STPS3L60Q and STPS3L60QRL maintain 150°C maximum. Thermal analysis is required to confirm junction temperature in the actual application.

Q: Should I select a substitute with higher voltage rating (60V) for improved reliability?

A: Higher voltage rating (60V vs. 40V) provides increased voltage stress margin and is acceptable for applications where the circuit voltage does not exceed 40V. However, STPS3L60Q and STPS3L60QRL use DO-15 package instead of DO-201AD, requiring mechanical verification. Forward voltage is higher (620 mV vs. 600 mV), increasing power dissipation. Selection should be based on circuit requirements, not solely on voltage margin. If the original design operates safely at 40V, a 40V-rated substitute is appropriate.

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