VS-MBR735PBF Equivalent & Substitute Parts

Part Overview

The VS-MBR735PBF is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 35 V DC reverse voltage and 7.5 A average rectified current in a Through Hole TO-220AC package. This component is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design support and procurement.

Key Parameters

Parameter	Value
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	35 V
Current - Average Rectified (Io)	7.5 A
Voltage - Forward (Vf) (Max) @ If	840 mV @ 15 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 35 V
Mounting Type	Through Hole
Package / Case	TO-220-2
Operating Temperature - Junction	-65°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the VS-MBR735PBF is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 35 V minimum
Current - Average Rectified (Io): 7.5 A minimum
Voltage - Forward (Vf) (Max) @ If: 840 mV @ 15 A maximum
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr: 100 µA @ 35 V maximum
Mounting Type: Through Hole
Package / Case: TO-220-2 or TO-220AC compatible

Substitution Categories:

Direct Manufacturer Equivalent: VS-MBR735-M3 maintains identical electrical specifications and packaging, with the primary difference being product status (Active vs. Discontinued) and packaging format (Tube).

Upgrade Substitute: MBR735G from onsemi provides identical electrical performance with extended maximum junction temperature (175°C vs. 150°C), though marked as Obsolete.

Manufacturer Recommended Substitute: STPS745D from STMicroelectronics offers higher reverse voltage rating (45 V vs. 35 V) with identical current and forward voltage specifications, providing enhanced voltage margin.

Parametric Equivalents: MBR735 from Solid State Inc. matches electrical specifications but differs in mounting type (Surface Mount DO-220AA vs. Through Hole TO-220-2), making it unsuitable for direct board-level replacement.

Parameter Comparison

Parameter	VS-MBR735PBF (Main)	VS-MBR735-M3	MBR735G	STPS745D
Manufacturer	Vishay	Vishay	onsemi	STMicroelectronics
Technology	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	35 V	35 V	35 V	45 V
Current - Average Rectified (Io)	7.5 A	7.5 A	7.5 A	7.5 A
Voltage - Forward (Vf) (Max) @ If	840 mV @ 15 A	840 mV @ 15 A	840 mV @ 15 A	840 mV @ 15 A
Speed	Fast Recovery ≤ 500 ns	Fast Recovery ≤ 500 ns	Fast Recovery ≤ 500 ns	Fast Recovery ≤ 500 ns
Current - Reverse Leakage @ Vr	100 µA @ 35 V	100 µA @ 35 V	100 µA @ 35 V	100 µA @ 45 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-2	TO-220-2	TO-220-2	TO-220-2
Operating Temperature - Junction (Max)	150°C	150°C	175°C	175°C
Product Status	Discontinued	Active	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Preferred): VS-MBR735-M3 is the primary substitute. It maintains identical electrical specifications and packaging while offering Active product status with higher inventory availability (9028 pcs vs. 791 pcs). This part is suitable for immediate procurement and board-level substitution without design modification.

For Enhanced Voltage Margin: STPS745D from STMicroelectronics is recommended when circuit design permits higher reverse voltage rating (45 V vs. 35 V). This part provides Active product status, higher inventory (16973 pcs), and extended maximum junction temperature (175°C). The increased voltage rating offers additional design margin for transient protection.

For Obsolete Design Support: MBR735G from onsemi is not recommended for new designs due to Obsolete product status. However, it remains electrically compatible for legacy system maintenance where inventory exists.

Not Recommended for Direct Replacement: MBR735 from Solid State Inc. differs in mounting type (Surface Mount DO-220AA vs. Through Hole TO-220-2) and is unsuitable for direct board-level substitution in Through Hole applications.

Frequently Asked Questions (FAQ)

Q: Can VS-MBR735-M3 be used as a direct replacement for VS-MBR735PBF? A: Yes. VS-MBR735-M3 is electrically and mechanically identical to VS-MBR735PBF. Both are Vishay Schottky diodes with 35 V reverse voltage, 7.5 A current rating, and TO-220-2 packaging. The primary difference is product status (Active vs. Discontinued) and packaging format (Tube vs. standard).

Q: What is the advantage of using STPS745D instead of VS-MBR735-M3? A: STPS745D provides 45 V reverse voltage rating compared to 35 V, offering 10 V additional voltage margin. Both parts share identical current (7.5 A), forward voltage (840 mV @ 15 A), and switching speed specifications. STPS745D also features extended maximum junction temperature (175°C vs. 150°C) and Active product status with higher inventory availability.

Q: Are the parametric equivalents from Solid State Inc. suitable replacements? A: No. While MBR735 from Solid State Inc. matches electrical specifications (35 V, 7.5 A), it uses Surface Mount DO-220AA packaging instead of Through Hole TO-220-2. This mounting type difference prevents direct board-level substitution in Through Hole applications.

Q: Is MBR735G from onsemi recommended for new designs? A: No. MBR735G is marked as Obsolete and is not recommended for new designs. It remains electrically compatible but should only be considered for legacy system maintenance where existing inventory is available.

Q: What compliance certifications apply to all substitute parts? A: All substitute parts (VS-MBR735-M3, MBR735G, STPS745D) are ROHS3 Compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are REACH Unaffected. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Q: Can these diodes be used interchangeably in high-temperature applications? A: VS-MBR735-M3 and VS-MBR735PBF are rated to 150°C maximum junction temperature. STPS745D and MBR735G extend to 175°C. For applications approaching 150°C, STPS745D or MBR735G provide additional thermal margin, though MBR735G is Obsolete.

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