Equivalent & Substitute Parts for US1KHE3_A/I

Part Overview

The US1KHE3_A/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode operates at 800 V DC reverse voltage with 1 A average rectified current in a DO-214AC (SMA) package. The device features fast recovery characteristics with a reverse recovery time of 75 nanoseconds and is qualified to AEC-Q101 automotive standards. The part is currently active in production with 721 pieces in stock. Equivalent and substitute parts are necessary to address supply chain requirements, packaging preferences, and alternative sourcing options while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.7 @ 1 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	75	ns
Current - Reverse Leakage @ Vr	10	µA @ 800 V
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitute parts for the US1KHE3_A/I are classified into two categories based on electrical and mechanical compatibility:

Category 1: Parametric Equivalents (800 V, 1 A, Fast Recovery)

These parts maintain identical or equivalent electrical specifications including 800 V reverse voltage, 1 A average rectified current, fast recovery characteristics (≤ 500ns), and 75 ns reverse recovery time. All parts in this category use the DO-214AC (SMA) surface mount package. Substitution within this category is based on matching:

Voltage - DC Reverse (Vr) (Max): 800 V
Current - Average Rectified (Io): 1 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr): 75 ns
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount

Category 2: Manufacturer Recommended Alternatives (1000 V, 1 A)

These parts operate at higher reverse voltage (1000 V) with 1 A average rectified current. While voltage rating is elevated, these devices are electrically compatible in applications where the higher voltage rating does not create design constraints. All parts maintain the DO-214AC (SMA) surface mount package and 1 A current rating. Key parameters for this category:

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 1 A
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
US1KHE3_A/I	Vishay	800	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	75	10 @ 800 V	DO-214AC (SMA)	-55 to 150	Active
US1K-E3/5AT	Vishay	800	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	75	10 @ 800 V	DO-214AC (SMA)	-55 to 150	Active
US1K-E3/61T	Vishay	800	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	75	10 @ 800 V	DO-214AC (SMA)	-55 to 150	Active
US1K-M3/5AT	Vishay	800	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	—	10 @ 800 V	DO-214AC (SMA)	-55 to 150	Active
US1KHE3_A/H	Vishay	800	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	75	10 @ 800 V	DO-214AC (SMA)	-55 to 150	Active
HS1K	Good-Ark Semiconductor	800	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	75	5 @ 800 V	DO-214AC (SMA)	-55 to 150	Active
US1K	Diotec Semiconductor	800	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	75	5 @ 800 V	DO-214AC (SMA)	-50 to 150	Active
GF1M	onsemi	1000	1	1.2 @ 1 A	Standard Recovery >500ns	2000	5 @ 1000 V	DO-214AC (SMA)	-65 to 175	Not For New Designs
GS1M-LTP	Micro Commercial Co	1000	1	1 @ 1 A	Standard Recovery >500ns	—	10 @ 1000 V	DO-214AC (SMA)	-55 to 150	Active
MRA4007T3G	onsemi	1000	1	1.1 @ 1 A	Standard Recovery >500ns	—	10 @ 1000 V	DO-214AC (SMA)	-55 to 175	Not For New Designs
STTH108A	STMicroelectronics	800	1	1.65 @ 1 A	Fast Recovery ≤ 500ns	75	5 @ 800 V	DO-214AC (SMA)	—	Active

Engineering Selection Recommendations

For Direct Parametric Equivalence (800 V, 1 A, Fast Recovery):

The following parts provide direct electrical and mechanical substitution for the US1KHE3_A/I:

US1K-E3/5AT (Vishay): Identical electrical specifications with Tape & Reel packaging. 5866 pieces in stock. Active product status.
US1K-E3/61T (Vishay): Identical electrical specifications with Cut Tape & Digi-Reel packaging. 35522 pieces in stock. Active product status. Highest inventory availability.
US1KHE3_A/H (Vishay): Identical electrical specifications with automotive grade and AEC-Q101 qualification. 7300 pieces in stock. Active product status.
STTH108A (STMicroelectronics): Equivalent 800 V, 1 A fast recovery specifications. 80200 pieces in stock. Active product status.
HS1K (Good-Ark Semiconductor): Equivalent 800 V, 1 A fast recovery specifications. 2600 pieces in stock. Active product status.
US1K (Diotec Semiconductor): Equivalent 800 V, 1 A fast recovery specifications. 20100 pieces in stock. Active product status.

For Higher Voltage Applications (1000 V, 1 A):

The following parts provide substitution for applications where 1000 V reverse voltage rating is acceptable:

GS1M-LTP (Micro Commercial Co): 1000 V, 1 A with standard recovery characteristics. 88005 pieces in stock. Active product status.
GF1M (onsemi): 1000 V, 1 A with standard recovery characteristics. 63580 pieces in stock. Not For New Designs status.
MRA4007T3G (onsemi): 1000 V, 1 A with standard recovery characteristics. 425100 pieces in stock. Not For New Designs status.

Parts designated "Not For New Designs" are available for legacy system support and replacement applications only.

Frequently Asked Questions (FAQ)

Q: Can I substitute US1K-E3/61T for US1KHE3_A/I?

A: Yes. Both parts share identical electrical specifications: 800 V reverse voltage, 1 A average rectified current, 1.7 V forward voltage at 1 A, fast recovery characteristics with 75 ns reverse recovery time, and DO-214AC (SMA) surface mount package. The primary difference is packaging format: US1K-E3/61T uses Cut Tape & Digi-Reel while US1KHE3_A/I uses Tape & Reel. Both are active products from Vishay.

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

A: Fast recovery diodes have reverse recovery time ≤ 500 ns (US1KHE3_A/I: 75 ns), while standard recovery diodes exceed 500 ns (GF1M, GS1M-LTP, MRA4007T3G: >500 ns). Fast recovery diodes are suitable for high-frequency switching applications. Standard recovery diodes are appropriate for lower-frequency rectification. Application requirements determine which recovery speed is necessary.

Q: Can I use GS1M-LTP as a direct replacement for US1KHE3_A/I?

A: GS1M-LTP is electrically compatible but not a direct replacement. While both operate at 1 A with DO-214AC (SMA) packaging, GS1M-LTP has 1000 V reverse voltage rating versus 800 V for US1KHE3_A/I. GS1M-LTP uses standard recovery characteristics (>500 ns) versus fast recovery (75 ns) for US1KHE3_A/I. Use GS1M-LTP only when application design permits higher voltage rating and standard recovery speed.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive electronics qualification standard. US1KHE3_A/I and US1KHE3_A/H carry this qualification, indicating suitability for automotive applications. Parts without this designation may not meet automotive reliability and testing requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed in this document are ROHS3 compliant, meeting lead-free and hazardous substance restrictions.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging supplies components on continuous tape wound on reels, suitable for high-volume automated assembly. Cut Tape & Digi-Reel packaging supplies components on tape segments or alternative reel formats, suitable for lower-volume or mixed-component assembly. Both formats use identical component specifications and performance characteristics.

Q: Why are some parts marked "Not For New Designs"?

A: Parts designated "Not For New Designs" (GF1M, MRA4007T3G) are legacy products no longer recommended for new circuit designs. These parts remain available for replacement and maintenance of existing systems. For new designs, select parts with "Active" product status.

Q: Can I use STTH108A in place of US1KHE3_A/I?

A: Yes. STTH108A provides equivalent electrical performance: 800 V reverse voltage, 1 A average rectified current, 1.65 V forward voltage at 1 A, fast recovery characteristics with 75 ns reverse recovery time, and DO-214AC (SMA) surface mount package. STTH108A is manufactured by STMicroelectronics and is an active product with high inventory availability (80200 pieces).

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