ES2B Equivalent & Substitute Parts

Part Overview

The onsemi ES2B is a superfast recovery rectifier diode rated for 100 V DC reverse voltage with 2 A average rectified current in a DO-214AA (SMB) surface mount package. This component features a 20 ns reverse recovery time and is designed for general-purpose rectification applications requiring fast switching characteristics.

The ES2B carries a "Not For New Designs" product status, indicating that onsemi has discontinued active development and support for this part number. This status necessitates identification of equivalent and substitute components from active manufacturers to ensure design continuity, supply chain reliability, and access to current manufacturing processes and quality assurance standards.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	100	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) Maximum @ If	900 mV @ 2 A	mV @ A
Reverse Recovery Time (trr)	20	ns
Current - Reverse Leakage @ Vr	10	µA @ 100 V
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the ES2B is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) Maximum: 100 V
Current - Average Rectified (Io): 2 A
Package / Case: DO-214AA (SMB) or DO-214AC (SMA)
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C minimum

Secondary Compatibility Factors:

Voltage - Forward (Vf) Maximum @ If: 900 mV @ 2 A (or equivalent)
Reverse Recovery Time (trr): 20–35 ns (fast recovery classification)
Current - Reverse Leakage @ Vr: ≤ 10 µA @ 100 V
RoHS3 Compliance and REACH Unaffected status

Substitute parts are grouped into three categories:

Direct Equivalents (DO-214AA/SMB Package): Parts with identical voltage, current, and package specifications, differing only in manufacturer or internal design variant codes.
Parametric Equivalents (DO-214AA/SMB Package): Vishay variants with matching electrical performance but different product codes reflecting manufacturing process or qualification levels.
Similar Alternatives (Package Variation): Parts meeting voltage and current requirements but in DO-214AC (SMA) package or with minor current derating (1.5 A vs. 2 A), suitable only when package footprint compatibility is confirmed.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If	trr (ns)	Ir @ Vr (µA)	Package	Product Status	RoHS
ES2B	onsemi	100	2	900 mV @ 2 A	20	10 @ 100 V	DO-214AA (SMB)	Not For New Designs	ROHS3
ES2B-E3/52T	Vishay General Semiconductor	100	2	900 mV @ 2 A	30	10 @ 100 V	DO-214AA (SMB)	Active	ROHS3
ES2B-E3/5BT	Vishay General Semiconductor	100	2	900 mV @ 2 A	30	10 @ 100 V	DO-214AA (SMB)	Active	ROHS3
ES2B-M3/52T	Vishay General Semiconductor	100	2	900 mV @ 2 A	30	10 @ 100 V	DO-214AA (SMB)	Active	ROHS3
ES2B-M3/5BT	Vishay General Semiconductor	100	2	900 mV @ 2 A	30	10 @ 100 V	DO-214AA (SMB)	Active	ROHS3
ES2B/1	Vishay General Semiconductor	100	2	900 mV @ 2 A	30	10 @ 100 V	DO-214AA (SMB)	Active	RoHS non-compliant
ES2BHE3_A/H	Vishay General Semiconductor	100	2	900 mV @ 2 A	20	10 @ 50 V	DO-214AA (SMB)	Active	ROHS3
ES2BHE3_A/I	Vishay General Semiconductor	100	2	900 mV @ 2 A	20	10 @ 50 V	DO-214AA (SMB)	Active	ROHS3
CGRB202-G	Comchip Technology	100	2	1.1 V @ 2 A	—	5 @ 100 V	DO-214AA (SMB)	Active	ROHS3
ES2B_R1_00001	Panjit International Inc.	100	2	950 mV @ 2 A	35	1 @ 100 V	DO-214AC (SMA)	Active	ROHS3
S2BA-13-F	Diodes Incorporated	100	1.5	1.15 V @ 1.5 A	—	5 @ 100 V	DO-214AC (SMA)	Active	ROHS3

Engineering Selection Recommendations

Preferred Direct Equivalents (Active Status, ROHS3 Compliant, DO-214AA Package):

The Vishay General Semiconductor parts ES2B-E3/52T, ES2B-E3/5BT, ES2B-M3/52T, and ES2B-M3/5BT are the primary recommended substitutes. These components maintain identical voltage and current ratings, preserve the DO-214AA (SMB) package footprint, and carry Active product status with ROHS3 compliance. The reverse recovery time specification of 30 ns represents a 50% increase over the original ES2B (20 ns), which remains within the fast recovery classification (≤ 500 ns) and is acceptable for general-purpose rectification circuits.

Automotive-Grade Alternative (Active Status, ROHS3 Compliant, AEC-Q101 Qualified):

The Vishay ES2BHE3_A/H and ES2BHE3_A/I parts offer automotive-grade qualification under AEC-Q101 standard with matching 20 ns reverse recovery time. These components are suitable for applications requiring automotive reliability standards. The reverse leakage current specification is measured at 50 V rather than 100 V, which does not affect functional equivalence.

Alternative Manufacturer Option (Active Status, ROHS3 Compliant, DO-214AA Package):

The Comchip Technology CGRB202-G provides an alternative source with identical voltage and current ratings in the DO-214AA package. Forward voltage is specified at 1.1 V @ 2 A, representing a 200 mV increase over the ES2B specification. Reverse leakage current is 5 µA @ 100 V, providing superior performance. This part is suitable for applications where forward voltage variation is acceptable within circuit design margins.

Package Variation Alternatives (Active Status, ROHS3 Compliant, DO-214AC/SMA Package):

The Panjit ES2B_R1_00001 and Diodes Incorporated S2BA-13-F are available in DO-214AC (SMA) package. The Panjit part maintains 2 A current rating with 950 mV forward voltage and 35 ns reverse recovery time. The Diodes Incorporated S2BA-13-F is rated for 1.5 A (not 2 A) and carries a -65°C to 150°C operating temperature range. These alternatives are suitable only when PCB layout permits SMA package substitution and, for the S2BA-13-F, when the 1.5 A current rating meets application requirements.

Non-Compliant Alternative (Not Recommended for New Designs):

The Vishay ES2B/1 carries RoHS non-compliant status and should not be selected for applications subject to RoHS3 regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the ES2B with any of the listed alternatives without circuit modification?

A: Direct substitution is possible with ES2B-E3/52T, ES2B-E3/5BT, ES2B-M3/52T, ES2B-M3/5BT, ES2BHE3_A/H, and ES2BHE3_A/I, provided the DO-214AA (SMB) package footprint is maintained on the PCB. These parts preserve voltage, current, and temperature specifications. The 30 ns reverse recovery time (versus 20 ns original) remains within fast recovery classification and does not require circuit redesign for standard rectification applications. The CGRB202-G requires verification that the 1.1 V forward voltage specification is acceptable within your circuit's voltage drop budget.

Q: What is the difference between the Vishay variants (ES2B-E3/52T, ES2B-E3/5BT, ES2B-M3/52T, ES2B-M3/5BT)?

A: These part numbers represent different manufacturing process codes and packaging configurations (Cut Tape vs. Tape & Reel) from Vishay General Semiconductor. Electrically, they are equivalent, all meeting 100 V, 2 A, and 900 mV forward voltage specifications. The suffix designations (-E3, -M3) and packaging codes (/52T, /5BT) reflect internal Vishay classification but do not affect functional performance. Selection should be based on available inventory and packaging format required for your assembly process.

Q: Why do some alternatives have different reverse recovery times (30 ns vs. 20 ns)?

A: Reverse recovery time variation reflects differences in semiconductor manufacturing processes between onsemi and Vishay. The original ES2B specifies 20 ns; most Vishay equivalents specify 30 ns. Both values fall within the fast recovery classification (≤ 500 ns, > 200 mA). For general-purpose rectification, power supply, and switching applications, this 10 ns difference does not impact circuit performance. Applications requiring precise switching edge control should confirm the 30 ns specification is acceptable through circuit simulation or testing.

Q: Can I use the Panjit ES2B_R1_00001 or Diodes S2BA-13-F as direct replacements?

A: These parts are not direct replacements due to package differences. The Panjit ES2B_R1_00001 and Diodes S2BA-13-F use DO-214AC (SMA) package instead of DO-214AA (SMB). SMA and SMB packages have different footprints and cannot be interchanged on existing PCBs without layout modification. Additionally, the S2BA-13-F is rated for 1.5 A, not 2 A, and is suitable only for applications where this lower current rating is acceptable. These alternatives are useful only when PCB redesign is feasible or when current derating is acceptable.

Q: What is the significance of the automotive-grade ES2BHE3_A/H and ES2BHE3_A/I parts?

A: These Vishay parts carry AEC-Q101 automotive qualification, indicating compliance with automotive industry reliability and quality standards. They are suitable for automotive applications, industrial equipment, and systems requiring automotive-grade component certification. Electrically, they match the original ES2B with 20 ns reverse recovery time and 900 mV forward voltage. If your application does not require automotive qualification, the standard ES2B-E3/52T or ES2B-E3/5BT variants are functionally equivalent and may offer better availability.

Q: Is the Comchip CGRB202-G a suitable alternative if forward voltage is critical?

A: The CGRB202-G specifies 1.1 V forward voltage @ 2 A, compared to the ES2B specification of 900 mV @ 2 A. This 200 mV difference must be evaluated within your circuit's voltage drop budget and power dissipation calculations. For low-voltage applications or circuits with tight voltage margins, this increase may be unacceptable. For general-purpose rectification in higher-voltage circuits, the difference is typically negligible. Verify forward voltage impact through circuit analysis before selection.

Q: Why is the ES2B/1 listed but not recommended?

A: The ES2B/1 carries RoHS non-compliant status, whereas the original ES2B and all recommended alternatives are ROHS3 compliant. RoHS3 compliance is a regulatory requirement in many markets and is mandatory for new product designs. The ES2B/1 should be avoided unless your application explicitly permits non-compliant components and your supply chain documentation confirms exemption status.

Q: What packaging formats are available for the recommended alternatives?

A: Recommended Vishay alternatives are available in Tape & Reel (TR) and Cut Tape (CT) formats. The Comchip CGRB202-G is available in Tape & Reel format. Packaging format selection depends on your assembly process: Tape & Reel is standard for automated pick-and-place assembly, while Cut Tape is used for manual assembly or lower-volume production. Verify packaging availability with your supplier before finalizing part selection.

Q: Can I mix different substitute parts in the same design or production run?

A: Yes, all recommended alternatives (ES2B-E3/52T, ES2B-E3/5BT, ES2B-M3/52T, ES2B-M3/5BT, ES2BHE3_A/H, ES2BHE3_A/I, and CGRB202-G) are electrically equivalent within specified tolerances and can be used interchangeably in the same circuit. However, for production consistency and supply chain traceability, it is recommended to standardize on a single part number per design. If multiple sources are required for supply chain resilience, document the approved alternatives in your design specifications and bill of materials.

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