US1J-M3/5AT Equivalent & Substitute Parts

Part Overview

The US1J-M3/5AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode operates at 600 V DC reverse voltage with 1 A average rectified current in a DO-214AC (SMA) package. The part is classified as Active product status and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility. Alternative part numbers are necessary to address supply chain availability, packaging format preferences, and specific application requirements while maintaining functional equivalence.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 1 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Current - Reverse Leakage @ Vr	10	µA @ 600 V
Mounting Type	Surface Mount	-
Package / Case	DO-214AC, SMA	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts are grouped into three categories based on substitution relationship type and electrical parameter alignment:

Parametric Equivalents (Vishay General Semiconductor - Diodes Division): Parts US1J-E3/5AT, US1J-E3/61T, US1J-M3/61T, US1JHE3_A/H, and US1JHE3_A/I match all critical electrical parameters including 600 V reverse voltage, 1 A average rectified current, 1.7 V forward voltage at 1 A, and fast recovery speed classification. These parts differ in packaging format (Cut Tape vs. Tape & Reel) and qualification level (standard vs. automotive AEC-Q101). Reverse recovery time (trr) of 75 ns and junction temperature range of -55°C to 150°C are specified for these equivalents.

Direct Manufacturer Equivalents (Alternative Manufacturers): Parts GS1J-LTP (Micro Commercial Co), CSFA105-G and CSFM105-G (Comchip Technology), and MRA4005T1G and MRA4005T3G (onsemi) provide functional equivalence at 600 V, 1 A with DO-214AC/SMA packaging. These parts exhibit variations in forward voltage (ranging from 1.0 V to 1.7 V), recovery speed classification (standard vs. fast recovery), and reverse leakage current (5 µA to 10 µA). The onsemi parts are marked as Not For New Designs but remain functionally compatible.

Key Substitution Parameters:

Voltage - DC Reverse (Vr) (Max): 600 V (all substitutes match)
Current - Average Rectified (Io): 1 A (all substitutes match)
Package / Case: DO-214AC, SMA (all substitutes match, except CSFM105-G in SOD-123T)
Mounting Type: Surface Mount (all substitutes match)
Operating Temperature Range: -55°C minimum (all substitutes match or exceed)
RoHS Status: ROHS3 Compliant (all substitutes match)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	Reverse Leakage @ Vr [µA]	Package	Packaging Format	Tj Range [°C]	Product Status
US1J-M3/5AT	Vishay	600	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	10 @ 600 V	DO-214AC, SMA	Tape & Reel (TR)	-55 to 150	Active
US1J-E3/5AT	Vishay	600	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	10 @ 600 V	DO-214AC, SMA	Cut Tape (CT) & Digi-Reel®	-55 to 150	Active
US1J-E3/61T	Vishay	600	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	10 @ 600 V	DO-214AC, SMA	Cut Tape (CT) & Digi-Reel®	-55 to 150	Active
US1J-M3/61T	Vishay	600	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	10 @ 600 V	DO-214AC, SMA	Tape & Reel (TR)	-55 to 150	Active
US1JHE3_A/H	Vishay	600	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	10 @ 600 V	DO-214AC, SMA	Tape & Reel (TR)	-55 to 150	Active
US1JHE3_A/I	Vishay	600	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	10 @ 600 V	DO-214AC, SMA	Tape & Reel (TR)	-55 to 150	Active
GS1J-LTP	Micro Commercial Co	600	1	1.0 @ 1 A	Standard Recovery >500ns	10 @ 600 V	DO-214AC, SMA	Tape & Reel (TR)	-55 to 150	Active
CSFA105-G	Comchip Technology	600	1	1.5 @ 1 A	Fast Recovery ≤ 500ns	5 @ 600 V	DO-214AC, SMA	Tape & Reel (TR)	-55 to 150	Active
CSFM105-G	Comchip Technology	600	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	5 @ 600 V	SOD-123T	Tape & Reel (TR)	-55 to 150	Active
MRA4005T1G	onsemi	600	1	1.1 @ 1 A	Standard Recovery >500ns	10 @ 600 V	DO-214AC, SMA	Tape & Reel (TR)	-55 to 175	Not For New Designs
MRA4005T3G	onsemi	600	1	1.1 @ 1 A	Standard Recovery >500ns	10 @ 600 V	DO-214AC, SMA	Cut Tape (CT) & Digi-Reel®	-55 to 175	Not For New Designs

Engineering Selection Recommendations

Vishay Parametric Equivalents (US1J-E3/5AT, US1J-E3/61T, US1J-M3/61T, US1JHE3_A/H, US1JHE3_A/I): These parts provide direct electrical equivalence to the US1J-M3/5AT with identical voltage, current, and forward voltage specifications. All are Active product status and ROHS3 compliant. Selection between these variants depends on packaging format requirements: Tape & Reel (TR) for high-volume automated assembly (US1J-M3/61T, US1JHE3_A/H, US1JHE3_A/I) or Cut Tape with Digi-Reel® for mixed-volume applications (US1J-E3/5AT, US1J-E3/61T). The automotive-qualified variants (US1JHE3_A/H, US1JHE3_A/I) carry AEC-Q101 certification for applications requiring automotive-grade reliability.

Comchip Technology Equivalents (CSFA105-G, CSFM105-G): These parts maintain 600 V, 1 A electrical compatibility with lower forward voltage (1.5 V for CSFA105-G) and reduced reverse leakage (5 µA). CSFA105-G uses standard DO-214AC/SMA packaging identical to the main part. CSFM105-G uses SOD-123T (Mini SMA) packaging, which is mechanically incompatible with standard SMA footprints and requires PCB redesign. Both are Active status and ROHS3 compliant.

Micro Commercial Co Equivalent (GS1J-LTP): This part matches voltage and current specifications but operates with standard recovery speed (>500ns) versus fast recovery (≤500ns) of the main part. Forward voltage is lower at 1.0 V. Active product status and ROHS3 compliant. Suitable for applications where recovery speed is not a critical constraint.

onsemi Equivalents (MRA4005T1G, MRA4005T3G): These parts are marked as Not For New Designs and should not be selected for new product development. Both exhibit standard recovery speed and lower forward voltage (1.1 V). Operating temperature range extends to 175°C. Existing designs using these parts may continue with them, but migration to Active-status alternatives is recommended for new applications.

Frequently Asked Questions (FAQ)

Q: Can US1J-E3/5AT replace US1J-M3/5AT directly?

A: Yes. Both parts have identical electrical specifications: 600 V reverse voltage, 1 A average rectified current, 1.7 V forward voltage at 1 A, and fast recovery speed. The difference is packaging format: US1J-E3/5AT uses Cut Tape with Digi-Reel® while US1J-M3/5AT uses Tape & Reel. PCB footprint and soldering process compatibility remain unchanged.

Q: What is the difference between fast recovery and standard recovery speed classifications?

A: Fast recovery diodes (≤500ns) have shorter reverse recovery time, reducing switching losses and enabling higher frequency operation. Standard recovery diodes (>500ns) have longer recovery times. The US1J-M3/5AT specifies fast recovery. Substitutes with standard recovery (GS1J-LTP, MRA4005T1G, MRA4005T3G) may introduce additional switching losses in high-frequency applications.

Q: Are automotive-qualified variants (US1JHE3_A/H, US1JHE3_A/I) required for all applications?

A: Automotive-qualified variants carry AEC-Q101 certification and are required only for automotive applications or designs requiring automotive-grade reliability standards. Standard variants (US1J-E3/5AT, US1J-E3/61T, US1J-M3/61T) are suitable for general industrial and consumer applications.

Q: Why is CSFM105-G listed as a substitute if it uses a different package (SOD-123T)?

A: CSFM105-G is electrically equivalent but mechanically incompatible with the DO-214AC/SMA footprint. It is listed as a substitute only for applications where PCB redesign is acceptable. Standard DO-214AC/SMA packages (CSFA105-G, all Vishay variants, GS1J-LTP, MRA4005 series) are direct mechanical replacements.

Q: Should I use onsemi MRA4005 series parts for new designs?

A: No. Both MRA4005T1G and MRA4005T3G are marked as Not For New Designs. These parts are listed for reference only in existing designs. New product development should use Active-status alternatives such as Vishay US1J variants or Comchip CSFA105-G.

Q: What is the significance of reverse leakage current differences (5 µA vs. 10 µA)?

A: Reverse leakage current affects power dissipation and circuit performance at high reverse voltages. Lower leakage (5 µA in Comchip parts) reduces standby power consumption. Higher leakage (10 µA in Vishay and onsemi parts) is within acceptable limits for most general-purpose applications. Selection depends on power budget requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the compliance profile of the US1J-M3/5AT.

Q: What packaging format should I select for high-volume production?

A: Tape & Reel (TR) format is standard for high-volume automated assembly. US1J-M3/5AT, US1J-M3/61T, US1JHE3_A/H, US1JHE3_A/I, GS1J-LTP, CSFA105-G, and CSFM105-G all offer Tape & Reel packaging. Cut Tape with Digi-Reel® (US1J-E3/5AT, US1J-E3/61T, MRA4005T3G) is suitable for mixed-volume or prototype applications.

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