US1GHM3_A/I Equivalent & Substitute Parts Reference

Part Overview

The Vishay General Semiconductor US1GHM3_A/I is a surface mount fast recovery rectifier diode rated 400 V, 1 A in DO-214AC (SMA) package, designed for general purpose rectification including automotive applications with AEC-Q101 qualification. It is an active, standard technology diode available in tape & reel (TR) packaging. Alternative models are necessary when inventory requirements, supply chain continuity, product lifecycle status, or compliance certifications dictate a need for substitute parts with matching electrical, mechanical, and compliance specifications.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	1A
Voltage - Forward (Vf) (Max) @ If	1 V @ 1 A
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	10 µA @ 400 V
Capacitance @ Vr, F	15pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute and equivalent rectifier diodes are selected based strictly on the following parameters:

Maximum DC reverse voltage (Vr)
Average rectified current (Io)
Maximum forward voltage drop (Vf) at 1A
Reverse recovery time (trr)
Reverse leakage current at rated Vr
Junction capacitance at standard Vr, frequency
Package and surface mount compatibility (DO-214AC/SMA)
Automotive qualification (AEC-Q101) and compliance (RoHS3, REACH) Parts meeting these criteria without deviation are listed as parametric equivalents.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ 1A	trr	Leakage @ Vr	Capacitance	Package / Case	Mounting Type	Qualification	RoHS Status	Operating Temp (Junction)	Product Status
US1GHM3_A/I	Vishay General Semiconductor	400 V	1A	1 V @ 1A	50 ns	10 µA @ 400 V	15pF @ 4V, 1MHz	DO-214AC, SMA	Surface Mount	AEC-Q101	ROHS3	-55°C ~ 150°C	Active
US1G-E3/5AT	Vishay General Semiconductor	400 V	1A	1 V @ 1A	50 ns	10 µA @ 400 V	15pF @ 4V, 1MHz	DO-214AC, SMA	Surface Mount	-	ROHS3	-55°C ~ 150°C	Active
US1G-E3/61T	Vishay General Semiconductor	400 V	1A	1 V @ 1A	50 ns	10 µA @ 400 V	15pF @ 4V, 1MHz	DO-214AC, SMA	Surface Mount	-	ROHS3	-55°C ~ 150°C	Active
US1G-M3/5AT	Vishay General Semiconductor	400 V	1A	1 V @ 1A	50 ns	10 µA @ 400 V	-	DO-214AC, SMA	Surface Mount	-	ROHS3	-55°C ~ 150°C	Active
US1GHE3_A/H	Vishay General Semiconductor	400 V	1A	1 V @ 1A	50 ns	10 µA @ 400 V	15pF @ 4V, 1MHz	DO-214AC, SMA	Surface Mount	AEC-Q101	ROHS3	-55°C ~ 150°C	Active
US1GHE3_A/I	Vishay General Semiconductor	400 V	1A	1 V @ 1A	50 ns	10 µA @ 400 V	15pF @ 4V, 1MHz	DO-214AC, SMA	Surface Mount	AEC-Q101	ROHS3	-55°C ~ 150°C	Active
ES1G	Good-Ark Semiconductor	400 V	1A	1.3 V @ 1A	35 ns	5 µA @ 400 V	8pF @ 4V, 1MHz	DO-214AC, SMA	Surface Mount	-	ROHS3	-55°C ~ 125°C	Active
US1G	Diotec Semiconductor	400 V	1A	1.25 V @ 1A	50 ns	5 µA @ 400 V	-	DO-214AC, SMA	Surface Mount	-	N/A	-50°C ~ 150°C	Active
US1G R3G	Taiwan Semiconductor	400 V	1A	1 V @ 1A	50 ns	5 µA @ 400 V	15pF @ 4V, 1MHz	DO-214AC, SMA	Surface Mount	-	ROHS3	-55°C ~ 150°C	Discontinued
US1GH	Taiwan Semiconductor	400 V	1A	1 V @ 1A	50 ns	5 µA @ 400 V	15pF @ 4V, 1MHz	DO-214AC, SMA	Surface Mount	AEC-Q101	ROHS3	-55°C ~ 150°C	Active

Engineering Selection Recommendations

Select substitute rectifier diodes for US1GHM3_A/I by matching product status, RoHS3 compliance, and AEC-Q101 qualification for automotive applications where required. Verify that the alternate diode is active and not discontinued, and that certification status and compliance meet system-level requirements. Automotive grade options include US1GHE3_A/H, US1GHE3_A/I, and US1GH, which are AEC-Q101 qualified and ROHS3 compliant. If automotive qualification is not required, select from any listed parametric equivalents with active product status and suitable RoHS compliance.

Frequently Asked Questions (FAQ)

Q1: What are the essential criteria for substituting US1GHM3_A/I in a circuit?
A1: Substitutes must match the maximum reverse voltage, average rectified current, maximum forward voltage drop, reverse recovery time, reverse leakage, capacitance, and package type. For automotive applications, AEC-Q101 qualification is required.

Q2: Are all substitutes in the same form factor as US1GHM3_A/I?
A2: All listed substitutions are surface mount devices in DO-214AC (SMA) package, securing mechanical and process compatibility.

Q3: Do any substitutes have different compliance or qualification status?
A3: Automotive grade and AEC-Q101 qualified substitutes are US1GHE3_A/H, US1GHE3_A/I, and US1GH. Selected alternatives should ensure RoHS compliance and match any required automotive qualification.

Q4: Are there electrical parameter differences among substitutes?
A4: US1GHM3_A/I and most listed Vishay and Taiwan Semiconductor substitutes are parametric equivalents. The ES1G and Diotec US1G differ in forward voltage drop, capacitance, and reverse recovery time, aligning with application tolerances strictly based on documented parameters.

Q5: When should discontinued substitute parts be avoided?
A5: Discontinued status (e.g., US1G R3G) indicates that the part should not be selected for new designs or ongoing production.

Q6: How can package and mounting compatibility be assured?
A6: All substitutes feature the surface mount DO-214AC (SMA) package ensuring compatibility with established PCB layouts and automated assembly processes.

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