MBRF7H35-E3/45 Equivalent & Substitute Parts

Part Overview

The MBRF7H35-E3/45 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-220-2 package configuration. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical performance within specified operating parameters while accommodating available packaging and mounting technologies.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	35	V
Current - Average Rectified (Io)	7.5	A
Voltage - Forward (Vf) (Max) @ If	630 mV @ 7.5 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	50	µA @ 35 V
Mounting Type	Through Hole	—
Package / Case	TO-220-2 Full Pack, Isolated Tab	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the MBRF7H35-E3/45 are selected based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) rating must equal or exceed 35 V
Current - Average Rectified (Io) must equal or exceed 7.5 A
Technology classification must be Schottky
Speed characteristic must be Fast Recovery (≤ 500ns, > 200mA)
RoHS3 compliance required
Operating temperature range must accommodate -65°C to 150°C junction temperature

Secondary Considerations:

Mounting type (through-hole preferred for direct replacement; surface mount requires board redesign)
Package configuration (TO-220-2 preferred; alternative packages acceptable if electrical parameters are met)
Forward voltage characteristics at rated current
Reverse leakage current specifications

Two substitute parts meet these criteria with varying trade-offs in mounting technology and electrical performance.

Parameter Comparison

Parameter	MBRF7H35-E3/45 (Main)	STPS745FP (Substitute)	V8P45-M3/87A (Substitute)
Manufacturer	Vishay General Semiconductor	STMicroelectronics	Vishay General Semiconductor
Voltage - DC Reverse (Vr) (Max)	35 V	45 V	45 V
Current - Average Rectified (Io)	7.5 A	7.5 A	4.3 A
Voltage - Forward (Vf) (Max) @ If	630 mV @ 7.5 A	840 mV @ 15 A	580 mV @ 8 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	50 µA @ 35 V	100 µA @ 45 V	600 µA @ 45 V
Mounting Type	Through Hole	Through Hole	Surface Mount
Package / Case	TO-220-2 Full Pack, Isolated Tab	TO-220-2 Full Pack	TO-277, 3-PowerDFN
Operating Temperature - Junction	-65°C ~ 150°C	Max 175°C	-40°C ~ 150°C
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

STPS745FP (STMicroelectronics) is the preferred direct substitute for through-hole applications. This part maintains identical mounting technology (through-hole TO-220-2), matches the 7.5 A current rating, and exceeds the 35 V reverse voltage requirement at 45 V. The component is in active production status with ROHS3 compliance. The higher forward voltage specification (840 mV @ 15 A versus 630 mV @ 7.5 A) reflects measurement at different current levels and does not preclude substitution. Maximum junction temperature rating of 175°C exceeds the original specification range.

V8P45-M3/87A (Vishay General Semiconductor) is an alternative substitute for applications where surface-mount technology is acceptable. This part provides 45 V reverse voltage rating and maintains Schottky fast-recovery characteristics with ROHS3 compliance. The current rating of 4.3 A is below the original 7.5 A specification and limits this substitute to lower-current applications. The surface-mount TO-277 package requires PCB redesign and is not suitable for direct mechanical replacement.

Both substitutes are in active production status, ensuring long-term availability and supply chain stability compared to the obsolete MBRF7H35-E3/45.

Frequently Asked Questions (FAQ)

Q: Can STPS745FP directly replace MBRF7H35-E3/45 without PCB modifications?

A: Yes. STPS745FP maintains identical through-hole TO-220-2 package configuration and pin layout, enabling direct mechanical and electrical substitution without PCB redesign.

Q: Why does STPS745FP have a higher forward voltage specification?

A: Forward voltage is measured at specific current levels. STPS745FP specifies 840 mV @ 15 A, while MBRF7H35-E3/45 specifies 630 mV @ 7.5 A. These measurements occur at different operating points and do not indicate incompatibility. Both devices exhibit fast-recovery Schottky characteristics.

Q: Is V8P45-M3/87A suitable for all applications requiring MBRF7H35-E3/45?

A: No. V8P45-M3/87A is rated for 4.3 A average rectified current, which is below the original 7.5 A specification. This substitute is limited to applications with current requirements not exceeding 4.3 A. Additionally, the surface-mount TO-277 package requires PCB layout modifications.

Q: What is the minimum reverse voltage rating required for a substitute?

A: Substitute parts must have a DC reverse voltage rating equal to or greater than 35 V. Both STPS745FP and V8P45-M3/87A meet this requirement at 45 V.

Q: Are both substitutes RoHS3 compliant?

A: Yes. STPS745FP and V8P45-M3/87A are both ROHS3 compliant, matching the environmental compliance status of the original MBRF7H35-E3/45.

Q: What is the operating temperature range for substitute parts?

A: STPS745FP supports junction temperatures up to 175°C maximum. V8P45-M3/87A operates from -40°C to 150°C. Both accommodate the original -65°C to 150°C range, with STPS745FP providing extended high-temperature capability.

Q: Why is MBRF7H35-E3/45 classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active substitutes ensure continued availability for maintenance, repair, and new production requirements.

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