UH1C-E3/5AT Equivalent & Substitute Parts

Part Overview

The UH1C-E3/5AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 150 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The diode features fast recovery characteristics with a reverse recovery time of 30 ns and operates across a junction temperature range of -55°C to 175°C.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	150	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.05 V @ 1 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	30	ns
Current - Reverse Leakage @ Vr	1	µA @ 150 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55 to 175	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the UH1C-E3/5AT are classified into two primary categories based on electrical and mechanical compatibility:

Parametric Equivalents (Direct Substitutes): Parts that maintain identical or equivalent electrical specifications across all critical parameters: 150 V DC reverse voltage rating, 1 A average rectified current, fast recovery speed classification (≤ 500ns), DO-214AC/SMA package, and -55°C to 175°C operating temperature range. These parts are interchangeable without circuit redesign.

Functional Alternatives (Conditional Substitutes): Parts that satisfy the core voltage and current requirements but differ in secondary parameters such as reverse recovery time, forward voltage characteristics, or technology type (Schottky vs. Standard). These parts require application-level verification to confirm suitability.

Voltage-Reduced Alternatives: Parts rated for lower reverse voltage (100 V) that may be used only in applications where the circuit voltage stress does not exceed the substitute part's rating.

The following key parameters determine substitution eligibility:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 150 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Package / Case: Must be DO-214AC or SMA equivalent
Mounting Type: Must be Surface Mount
Speed Classification: Fast Recovery preferred for equivalent performance

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [V]	trr [ns]	Ir @ Vr [µA]	Technology	Package	Status
UH1C-E3/5AT	Vishay	150	1	1.05	30	1 @ 150V	Standard	DO-214AC	Obsolete
VS-1EMH02-M3/5AT	Vishay	200	1	0.9	15.2	2 @ 200V	Standard	DO-214AC	Active
UH1CHE3_A/H	Vishay	150	1	1.05	25	1 @ 150V	Standard	DO-214AC	Obsolete
UH1CHE3_A/I	Vishay	150	1	1.05	25	1 @ 150V	Standard	DO-214AC	Obsolete
STPS1150A	STMicroelectronics	150	1	0.82	—	1 @ 150V	Schottky	DO-214AC	Active
EGF1C	Fairchild Semiconductor	150	1	1.0	50	10 @ 150V	Standard	DO-214AC	Active
ES1C	Taiwan Semiconductor Corporation	150	1	0.95	35	5 @ 150V	Standard	DO-214AC	Active
ES1C-13-F	Diodes Incorporated	150	1	0.92	25	5 @ 150V	Standard	DO-214AC	Active
S1B-13-F	Diodes Incorporated	100	1	1.1	3000	5 @ 100V	Standard	DO-214AC	Active
SBR1U150SA-13	Diodes Incorporated	150	1	0.7	—	100 @ 150V	Super Barrier	DO-214AC	Active
US1B-13-F	Diodes Incorporated	100	1	1.0	50	5 @ 100V	Standard	DO-214AC	Active

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement):

The VS-1EMH02-M3/5AT (Vishay FRED Pt® series) is the recommended primary substitute. This part maintains the same manufacturer lineage, identical current rating, and superior electrical characteristics including lower forward voltage (0.9 V vs. 1.05 V) and faster reverse recovery time (15.2 ns vs. 30 ns). The higher voltage rating (200 V) provides additional design margin. Product status is Active with high inventory availability (15,716 pcs).

The UH1CHE3_A/H and UH1CHE3_A/I variants are parametric equivalents with identical voltage and current specifications. Both feature AEC-Q101 automotive qualification and slightly improved reverse recovery time (25 ns). These parts are suitable for applications requiring automotive-grade components, though both are classified as Obsolete.

Secondary Substitutes (Conditional Replacement):

The ES1C-13-F (Diodes Incorporated) provides equivalent voltage and current ratings with active product status and good inventory availability (10,300 pcs). Forward voltage (0.92 V) and reverse recovery time (25 ns) are comparable to the main part. Operating temperature range extends to -55°C to 150°C, which is acceptable for most applications within the UH1C-E3/5AT's specified range.

The EGF1C (Fairchild Semiconductor) maintains 150 V / 1 A specifications with active status and substantial inventory (16,300 pcs). Forward voltage (1.0 V) is nearly identical to the original part. Reverse recovery time (50 ns) is longer, requiring verification in high-frequency switching applications.

The ES1C (Taiwan Semiconductor Corporation) offers 150 V / 1 A ratings with active status and the highest inventory availability (26,800 pcs). Forward voltage (0.95 V) and reverse recovery time (35 ns) are within acceptable ranges for general-purpose applications.

Technology Alternative:

The STPS1150A (STMicroelectronics) is a Schottky diode with identical voltage and current ratings. The significantly lower forward voltage (0.82 V) reduces power dissipation, making it suitable for applications where thermal performance is critical. Schottky technology inherently exhibits faster switching characteristics. Product status is Active with high inventory (19,161 pcs). Schottky diodes exhibit higher reverse leakage current, which must be evaluated in low-power or high-impedance circuits.

Super Barrier Alternative:

The SBR1U150SA-13 (Diodes Incorporated SBR® series) combines 150 V / 1 A ratings with significantly reduced forward voltage (0.7 V), offering superior efficiency. AEC-Q101 automotive qualification is included. Reverse leakage current (100 µA @ 150 V) is substantially higher than the original part and must be verified for circuit compatibility. Inventory availability is excellent (67,818 pcs).

Voltage-Reduced Alternatives (Not Recommended for Direct Substitution):

The S1B-13-F and US1B-13-F are rated for 100 V maximum reverse voltage. These parts are suitable only in applications where circuit voltage stress does not exceed 100 V. Standard recovery technology (3 µs and 50 ns respectively) differs significantly from the original part's fast recovery characteristics.

Compliance and Certification:

All recommended substitutes maintain ROHS3 compliance and REACH Unaffected status, consistent with the original part. Moisture Sensitivity Level (MSL) is 1 (Unlimited) across all alternatives, eliminating moisture-related handling concerns.

Frequently Asked Questions (FAQ)

Q: Can the VS-1EMH02-M3/5AT directly replace the UH1C-E3/5AT without circuit modification?

A: Yes. The VS-1EMH02-M3/5AT maintains identical current rating (1 A), equivalent voltage rating (200 V exceeds the 150 V requirement), identical package (DO-214AC), and superior electrical characteristics. The higher voltage rating provides additional design margin. No circuit modification is required.

Q: What is the difference between the UH1CHE3_A/H and UH1CHE3_A/I variants?

A: Both parts are parametric equivalents with identical electrical specifications: 150 V / 1 A ratings, 1.05 V forward voltage, and 25 ns reverse recovery time. Both include AEC-Q101 automotive qualification. The designation difference reflects internal manufacturing or qualification variations. Either variant is interchangeable with the original UH1C-E3/5AT.

Q: Why is the STPS1150A (Schottky) listed as an alternative if it uses different technology?

A: The STPS1150A maintains identical voltage (150 V) and current (1 A) ratings and package (DO-214AC). Schottky technology provides lower forward voltage (0.82 V vs. 1.05 V), reducing power dissipation and heat generation. This makes it suitable for applications where thermal efficiency is important. However, Schottky diodes exhibit higher reverse leakage current (1 µA vs. 10 µA typical), which must be verified in low-power or high-impedance circuits before substitution.

Q: Can the SBR1U150SA-13 be used as a direct replacement?

A: The SBR1U150SA-13 maintains 150 V / 1 A ratings and DO-214AC packaging, making it mechanically and electrically compatible. The significantly lower forward voltage (0.7 V) improves efficiency. However, reverse leakage current is substantially higher (100 µA @ 150 V vs. 1 µA for the original part). This elevated leakage must be evaluated in applications sensitive to standby current or high-impedance circuits. AEC-Q101 automotive qualification is included.

Q: Are the 100 V alternatives (S1B-13-F, US1B-13-F) suitable replacements?

A: No, not for direct substitution. These parts are rated for maximum 100 V reverse voltage, which is insufficient for circuits designed for 150 V operation. They are suitable only in applications where circuit voltage stress does not exceed 100 V. Additionally, these parts feature standard recovery technology with significantly longer reverse recovery times (3 µs and 50 ns), differing substantially from the original part's 30 ns specification.

Q: What is the significance of the "Active" vs. "Obsolete" product status?

A: Active status indicates the manufacturer continues production and maintains long-term availability. Obsolete status indicates the manufacturer has discontinued production, though existing inventory may remain available. For the UH1C-E3/5AT (Obsolete), substitution with an Active-status part ensures long-term design support and procurement continuity.

Q: Do all substitute parts maintain the same operating temperature range?

A: Most substitutes maintain the -55°C to 175°C range. The ES1C and ES1C-13-F are rated to -55°C to 150°C, which is acceptable for applications within the original part's specified range but does not extend the upper temperature limit. The SBR1U150SA-13 is rated to -65°C to 150°C, providing lower temperature capability but with a 25°C reduction in maximum junction temperature.

Q: Is the DO-214AC package identical to the SMA package designation?

A: Yes. DO-214AC and SMA refer to the same surface mount package. The designations are equivalent, with SMA being the industry-standard abbreviation for this package type. All substitute parts listed use this identical package, ensuring mechanical compatibility and PCB footprint interchangeability.

Q: Which substitute offers the best overall performance improvement?

A: The VS-1EMH02-M3/5AT provides the most comprehensive performance improvement: lower forward voltage (0.9 V vs. 1.05 V), faster reverse recovery time (15.2 ns vs. 30 ns), higher voltage rating (200 V), and Active product status with excellent inventory availability. This part is the recommended primary substitute for new designs and ongoing production.

Q: Can multiple substitute parts be used interchangeably within the same design?

A: Parts with identical electrical specifications (150 V / 1 A / DO-214AC) can be used interchangeably: VS-1EMH02-M3/5AT, UH1CHE3_A/H, UH1CHE3_A/I, EGF1C, ES1C, and ES1C-13-F. However, parts with different technologies (Schottky vs. Standard) or different voltage ratings (100 V vs. 150 V) should not be mixed within the same circuit without application-level verification, as they exhibit different electrical characteristics that may affect circuit performance.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message