US1D-M3/5AT Equivalent & Substitute Parts

Part Overview

The US1D-M3/5AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode operates at 200 V DC reverse voltage with 1 A average rectified current in a DO-214AC (SMA) package. The part is classified as Active and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when equivalent performance specifications from different manufacturers are needed to maintain supply chain flexibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1	V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	10	µA @ 200 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

Substitution of the US1D-M3/5AT is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

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

Acceptable Variation Parameters:

Current - Reverse Leakage @ Vr: 5 µA to 10 µA @ 200 V (lower leakage is acceptable)
Reverse Recovery Time (trr): 35 ns to 50 ns (faster recovery is acceptable)
Capacitance @ Vr, F: 15 pF to 50 pF @ 4V, 1MHz (minor variations acceptable)
Packaging Format: Tape & Reel (TR), Cut Tape (CT), or Bag (acceptable for equivalent electrical performance)

Manufacturer Variations: Substitute parts from different manufacturers (Comchip Technology, EVVO Semi, SURGE, Taiwan Semiconductor Corporation, SMC Diode Solutions, Good-Ark Semiconductor) are included when all mandatory equivalence parameters are met.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	Ir @ Vr [µA]	trr [ns]	Package	Packaging Format	Product Status
US1D-M3/5AT	Vishay General Semiconductor	200	1	1 @ 1 A	Fast Recovery ≤ 500ns	10 @ 200 V	—	DO-214AC (SMA)	Tape & Reel (TR)	Active
US1D-E3/5AT	Vishay General Semiconductor	200	1	1 @ 1 A	Fast Recovery ≤ 500ns	10 @ 200 V	50	DO-214AC (SMA)	Tape & Reel (TR)	Active
US1D-E3/61T	Vishay General Semiconductor	200	1	1 @ 1 A	Fast Recovery ≤ 500ns	10 @ 200 V	50	DO-214AC (SMA)	Cut Tape (CT)	Active
US1DHE3_A/H	Vishay General Semiconductor	200	1	1 @ 1 A	Fast Recovery ≤ 500ns	10 @ 200 V	50	DO-214AC (SMA)	Tape & Reel (TR)	Active
HS2DA	Good-Ark Semiconductor	200	1.5	1 @ 1.5 A	Fast Recovery ≤ 500ns	5 @ 200 V	50	DO-214AC (SMA)	Tape & Reel (TR)	Active
ES1D	EVVO Semi	200	1	1 @ 1 A	Fast Recovery ≤ 500ns	5 @ 200 V	35	DO-214AC (SMA)	Cut Tape (CT) & Digi-Reel®	Active
ES1D-HF	Comchip Technology	200	1	1 @ 1 A	Fast Recovery ≤ 500ns	5 @ 200 V	35	DO-214AC (SMA)	Tape & Reel (TR)	Active
HS1D	SURGE	200	1	1 @ 1 A	Fast Recovery ≤ 500ns	5 @ 200 V	50	DO-214AC (SMA)	Bag	Active
HS1D R3G	Taiwan Semiconductor Corporation	200	1	1 @ 1 A	Fast Recovery ≤ 500ns	5 @ 200 V	50	DO-214AC (SMA)	Cut Tape (CT)	Discontinued at DiGi Electronics
US1D	SMC Diode Solutions	200	1	1 @ 1 A	Fast Recovery ≤ 500ns	—	—	DO-214AC (SMA)	Cut Tape (CT) & Digi-Reel®	Active
US1D R3G	Taiwan Semiconductor Corporation	200	1	1 @ 1 A	Fast Recovery ≤ 500ns	5 @ 200 V	50	DO-214AC (SMA)	Tape & Reel (TR)	Discontinued at DiGi Electronics

Engineering Selection Recommendations

Primary Substitutes (Vishay General Semiconductor - Same Manufacturer):

US1D-E3/5AT and US1D-E3/61T are direct parametric equivalents from the same manufacturer. Selection between these parts depends on packaging format requirements: US1D-E3/5AT is supplied in Tape & Reel format, while US1D-E3/61T is supplied in Cut Tape format. Both are Active products with full compliance documentation.

US1DHE3_A/H is an automotive-grade variant (AEC-Q101 qualified) from Vishay, suitable for applications requiring automotive qualification. This part is Active and maintains all electrical equivalence parameters.

Secondary Substitutes (Alternative Manufacturers - Equivalent Electrical Performance):

ES1D-HF (Comchip Technology) and ES1D (EVVO Semi) meet all mandatory electrical parameters with improved reverse recovery time (35 ns versus 50 ns) and lower reverse leakage current (5 µA versus 10 µA). Both are Active products. ES1D-HF is supplied in Tape & Reel format; ES1D is supplied in Cut Tape & Digi-Reel® format.

HS1D (SURGE) meets all mandatory electrical parameters with lower reverse leakage current (5 µA). This part is Active and supplied in Bag format.

US1D (SMC Diode Solutions) meets all mandatory electrical parameters and is Active. This part is supplied in Cut Tape & Digi-Reel® format.

Discontinued Parts (Limited Availability):

HS1D R3G and US1D R3G (Taiwan Semiconductor Corporation) are marked as Discontinued at DiGi Electronics. These parts meet all mandatory electrical parameters but should be used only when current inventory is confirmed available and long-term supply is not required.

Higher Current Alternative:

HS2DA (Good-Ark Semiconductor) provides 1.5 A average rectified current versus 1 A for the primary part. This part is suitable only for applications where the higher current rating is required and the circuit design accommodates the increased current capacity. HS2DA is Active and supplied in Tape & Reel format.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited). All operate across the -55°C to 150°C junction temperature range. Selection should prioritize Active status products for new designs. Discontinued parts should be reserved for legacy system maintenance only.

Frequently Asked Questions (FAQ)

Q: Can US1D-E3/5AT replace US1D-M3/5AT directly?

A: Yes. US1D-E3/5AT is a parametric equivalent with identical electrical specifications (200 V, 1 A, 1 V forward voltage, fast recovery). Both are supplied in Tape & Reel format and are Active products from the same manufacturer.

Q: What is the difference between US1D-E3/5AT and US1D-E3/61T?

A: The electrical specifications are identical. The difference is packaging format: US1D-E3/5AT is supplied in Tape & Reel (TR) format, while US1D-E3/61T is supplied in Cut Tape (CT) format. Selection depends on your assembly equipment and process requirements.

Q: Can I use ES1D-HF instead of US1D-M3/5AT?

A: Yes. ES1D-HF meets all mandatory electrical parameters (200 V, 1 A, 1 V forward voltage, fast recovery, DO-214AC package). ES1D-HF is from Comchip Technology and is Active. The reverse recovery time is faster (35 ns versus unspecified for the main part), and reverse leakage is lower (5 µA versus 10 µA), both of which are acceptable improvements.

Q: Is US1DHE3_A/H suitable for automotive applications?

A: Yes. US1DHE3_A/H is AEC-Q101 qualified and designated as automotive-grade. It meets all electrical equivalence parameters and is suitable for automotive circuit designs requiring this qualification.

Q: Why is HS2DA listed as a substitute if it has 1.5 A instead of 1 A?

A: HS2DA is listed as a manufacturer-recommended alternative. The higher current rating (1.5 A) makes it suitable for applications where increased current capacity is beneficial. However, it should only be selected if your circuit design and thermal management accommodate the higher current specification. The 200 V reverse voltage and fast recovery characteristics remain equivalent.

Q: Can I use parts marked as "Discontinued at DiGi Electronics"?

A: Parts marked as Discontinued at DiGi Electronics (HS1D R3G and US1D R3G) meet all electrical equivalence parameters but have limited availability. These parts should be used only when current inventory is confirmed and long-term supply is not required. For new designs, select from Active status parts.

Q: What does "Tape & Reel (TR)" versus "Cut Tape (CT)" mean?

A: Tape & Reel (TR) format supplies components on a continuous reel suitable for high-speed automated assembly. Cut Tape (CT) format supplies components on tape segments, typically used for lower-volume assembly or manual placement. Both formats contain the same component; selection depends on your assembly process and equipment.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant with MSL 1 (Unlimited moisture sensitivity level). All operate across the -55°C to 150°C junction temperature range.

Q: What is the significance of reverse recovery time (trr)?

A: Reverse recovery time is the time required for the diode to switch from forward conduction to reverse blocking. Faster recovery times (35 ns versus 50 ns) reduce switching losses and improve efficiency in high-frequency applications. All substitute parts meet the fast recovery classification (≤ 500ns, > 200mA).

Q: Can I mix different manufacturers' parts in the same circuit board?

A: Yes. All substitute parts meet identical electrical specifications for the critical parameters (voltage, current, forward voltage, speed classification, package, temperature range, and compliance). Mixing manufacturers is acceptable from an electrical standpoint. However, verify that your procurement and quality assurance processes accommodate multiple suppliers.

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