ES1B/1 Equivalent & Substitute Parts

Part Overview

The ES1B/1 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 100 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. This part is classified as obsolete and is no longer in active production. Finding equivalent substitute parts is necessary to support ongoing design requirements, ensure supply chain continuity, and maintain compatibility with existing circuit applications. Active alternatives with identical electrical specifications and packaging are available from the same manufacturer.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	920 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	25	ns
Current - Reverse Leakage @ Vr	5 µA @ 100 V	µA
Capacitance @ Vr, F	10 pF @ 4V, 1MHz	pF
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—

Substitute Part Grouping Explanation

Substitute parts for the ES1B/1 are selected based on strict parametric equivalence across all critical electrical and mechanical specifications. The following parameters determine substitution eligibility:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 920 mV @ 1 A
Reverse Recovery Time (trr): 25 ns (or 24 ns for U1B variants)
Current - Reverse Leakage @ Vr: 5 µA @ 100 V
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 150°C

Secondary Considerations:

Product Status: Active (preferred over obsolete)
RoHS Compliance: ROHS3 Compliant (preferred)
Packaging Format: Cut Tape (CT), Digi-Reel®, or Tape & Reel (TR)
Grade and Qualification: Standard or Automotive (AEC-Q101)

All substitute parts listed maintain identical electrical performance and physical compatibility with the ES1B/1. Differences in packaging format and product status do not affect functional interchangeability in circuit applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	trr [ns]	Ir @ Vr [µA]	Package	Product Status	RoHS Status
ES1B/1	Vishay	100	1	920 @ 1 A	25	5 @ 100 V	DO-214AC	Obsolete	Non-compliant
ES1B-E3/5AT	Vishay	100	1	920 @ 1 A	25	5 @ 100 V	DO-214AC	Active	ROHS3 Compliant
ES1B-E3/61T	Vishay	100	1	920 @ 1 A	25	5 @ 100 V	DO-214AC	Active	ROHS3 Compliant
ES1B-M3/5AT	Vishay	100	1	920 @ 1 A	25	5 @ 100 V	DO-214AC	Active	ROHS3 Compliant
ES1B-M3/61T	Vishay	100	1	920 @ 1 A	25	5 @ 100 V	DO-214AC	Active	ROHS3 Compliant
ES1BHE3_A/H	Vishay	100	1	920 @ 1 A	25	5 @ 100 V	DO-214AC	Active	ROHS3 Compliant
ES1BHE3_A/I	Vishay	100	1	920 @ 1 A	25	5 @ 100 V	DO-214AC	Active	ROHS3 Compliant
ES1BHM3_A/H	Vishay	100	1	920 @ 1 A	25	5 @ 100 V	DO-214AC	Active	ROHS3 Compliant
ES1BHM3_A/I	Vishay	100	1	920 @ 1 A	25	5 @ 100 V	DO-214AC	Active	ROHS3 Compliant
U1B-E3/5AT	Vishay	100	1	920 @ 1 A	24	5 @ 100 V	DO-214AC	Active	ROHS3 Compliant
U1B-E3/61T	Vishay	100	1	920 @ 1 A	24	5 @ 100 V	DO-214AC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Identical Specifications):

The ES1B-E3/5AT and ES1B-E3/61T are direct parametric equivalents to the ES1B/1. Both parts maintain all electrical specifications including 100 V reverse voltage, 1 A average rectified current, 920 mV forward voltage drop, and 25 ns reverse recovery time. Both are active products with ROHS3 compliance. The ES1B-E3/61T offers higher inventory availability (70,533 units) compared to ES1B-E3/5AT (27,048 units). Selection between these two should be based on packaging format requirements: ES1B-E3/5AT is supplied in Cut Tape (CT) & Digi-Reel® format, while ES1B-E3/61T is supplied in Cut Tape (CT) & Digi-Reel® format.

Automotive-Grade Alternatives:

The ES1BHE3_A/H, ES1BHE3_A/I, ES1BHM3_A/H, and ES1BHM3_A/I variants are automotive-qualified parts (AEC-Q101) with identical electrical specifications. These parts are suitable for applications requiring automotive-grade reliability and traceability. All are active products with ROHS3 compliance and Tape & Reel (TR) packaging.

Tape & Reel Packaging Options:

For applications requiring Tape & Reel (TR) packaging, the ES1B-M3/5AT and ES1B-M3/61T provide standard-grade alternatives with full parametric equivalence. Both are active products with ROHS3 compliance.

U1B Series Alternative:

The U1B-E3/5AT and U1B-E3/61T represent a different base product number but maintain electrical equivalence with a reverse recovery time of 24 ns (1 ns faster than the ES1B/1). These parts are active, ROHS3 compliant, and supplied in Tape & Reel (TR) packaging. The U1B-E3/61T offers the highest inventory availability (12,100 units) among all alternatives.

Compliance Consideration:

The ES1B/1 is RoHS non-compliant. All substitute parts listed are ROHS3 compliant, making them suitable for applications subject to RoHS regulations.

Frequently Asked Questions (FAQ)

Q: Can I directly replace ES1B/1 with ES1B-E3/5AT or ES1B-E3/61T?

A: Yes. Both parts are parametric equivalents with identical electrical specifications (100 V, 1 A, 920 mV forward voltage, 25 ns reverse recovery time) and the same DO-214AC surface mount package. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between ES1B-E3/5AT and ES1B-E3/61T?

A: Both parts have identical electrical specifications and package type. The difference is in the packaging format designation (5AT vs. 61T) and inventory availability. ES1B-E3/61T has significantly higher stock (70,533 units vs. 27,048 units).

Q: Are automotive-grade variants (ES1BHE3_A/H, ES1BHE3_A/I) electrically identical to the standard ES1B/1?

A: Yes. The automotive variants maintain all electrical specifications of the ES1B/1. The difference is the addition of AEC-Q101 automotive qualification and Tape & Reel (TR) packaging format. These parts are suitable for both standard and automotive applications.

Q: What is the difference between ES1B and U1B series parts?

A: Both series are 100 V, 1 A general-purpose rectifier diodes in DO-214AC packages. The U1B variants have a reverse recovery time of 24 ns compared to 25 ns for ES1B variants. This 1 ns difference is within normal manufacturing tolerance and does not affect functional interchangeability in circuit applications.

Q: Which substitute part should I select for new designs?

A: For new designs, select from active products with ROHS3 compliance. The ES1B-E3/61T offers the best combination of availability, compliance, and parametric equivalence. For automotive applications, select ES1BHE3_A/H or ES1BHE3_A/I with AEC-Q101 qualification.

Q: Does packaging format (Cut Tape vs. Tape & Reel) affect electrical performance?

A: No. Packaging format affects only the physical delivery and handling method. Electrical specifications and performance are identical regardless of whether the part is supplied in Cut Tape (CT), Digi-Reel®, or Tape & Reel (TR) format.

Q: Can I use U1B-E3/61T as a substitute for ES1B/1?

A: Yes. The U1B-E3/61T is electrically equivalent with a 24 ns reverse recovery time (1 ns faster than ES1B/1's 25 ns). All other specifications are identical. The faster recovery time does not create compatibility issues in standard applications.

Q: Is the ES1B/1 still available for purchase?

A: The ES1B/1 is classified as obsolete and no longer in active production. However, 1,075 units are reported in stock as new original inventory. For long-term supply assurance, transition to active alternatives such as ES1B-E3/61T or U1B-E3/61T.

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