HS2A Equivalent & Substitute Parts Reference

Part Overview

The HS2A is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 2 A average rectified current in a DO-214AA (SMB) surface mount package. This device is classified as discontinued at DiGi Electronics, necessitating identification of active equivalent and substitute components for ongoing production and repair applications. The part exhibits fast recovery characteristics with a 50 ns reverse recovery time and operates across a junction temperature range of -55°C to 150°C. Equivalent alternatives are available from multiple manufacturers with matching or superior electrical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1 V @ 2 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the HS2A is determined by strict equivalence of the following electrical and mechanical parameters:

Primary Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 2 A
Package / Case: DO-214AA (SMB) surface mount
Mounting Type: Surface Mount

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: ≤ 1.1 V @ 2 A
Speed Classification: Fast Recovery (≤ 500ns) or Standard Recovery (>500ns)
Reverse Recovery Time (trr): ≤ 50 ns preferred for fast recovery types
Current - Reverse Leakage @ Vr: ≤ 10 µA @ 50 V
Operating Temperature - Junction: -55°C to 150°C minimum
RoHS3 Compliance and MSL 1 rating

Parts are grouped into three categories: Direct Parametric Equivalents (identical electrical specifications and package), Direct Manufacturer Equivalents (same voltage and current ratings with minor specification variations), and Similar Alternatives (matching voltage and current with different recovery characteristics or package variants).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Product Status
HS2A	Taiwan Semiconductor Corporation	50	2	1 @ 2A	Fast Recovery ≤ 500ns	50	5 @ 50V	DO-214AA (SMB)	Discontinued
HS2A	Taiwan Semiconductor Corporation	50	2	1 @ 2A	Fast Recovery ≤ 500ns	50	5 @ 50V	DO-214AA (SMB)	Active
CURB201-G	Comchip Technology	50	2	1 @ 2A	Fast Recovery ≤ 500ns	50	5 @ 50V	DO-214AA (SMB)	Active
CGRB201-G	Comchip Technology	50	2	1.1 @ 2A	Standard Recovery >500ns	—	5 @ 50V	DO-214AA (SMB)	Active
ES2A-13-F	Diodes Incorporated	50	2	0.92 @ 2A	Fast Recovery ≤ 500ns	25	5 @ 50V	DO-214AA (SMB)	Active
ES2AA-13-F	Diodes Incorporated	50	2	0.92 @ 2A	Fast Recovery ≤ 500ns	25	5 @ 50V	DO-214AC (SMA)	Active
ES2AHE3_A/H	Vishay General Semiconductor - Diodes Division	50	2	0.9 @ 2A	Fast Recovery ≤ 500ns	20	10 @ 50V	DO-214AA (SMB)	Active
ES2AHE3_A/I	Vishay General Semiconductor - Diodes Division	50	2	0.9 @ 2A	Fast Recovery ≤ 500ns	20	10 @ 50V	DO-214AA (SMB)	Active
ES2AHM3/5BT	Vishay General Semiconductor - Diodes Division	50	2	0.9 @ 2A	Fast Recovery ≤ 500ns	30	10 @ 50V	DO-214AA (SMB)	Active
RS2A-13-F	Diodes Incorporated	50	1.5	1.3 @ 1.5A	Fast Recovery ≤ 500ns	150	5 @ 50V	DO-214AC (SMA)	Active
CGRB301-G	Comchip Technology	50	3	1.1 @ 3A	Standard Recovery >500ns	—	5 @ 50V	DO-214AA (SMB)	Active

Engineering Selection Recommendations

Direct Parametric Equivalent (Recommended Primary Replacement):

The HS2A manufactured by Taiwan Semiconductor Corporation with active product status is the direct parametric equivalent. This part maintains identical electrical specifications including 50 V reverse voltage, 2 A average rectified current, 1 V forward voltage at 2 A, 50 ns reverse recovery time, and DO-214AA (SMB) package configuration. This option provides the highest level of design compatibility and requires no circuit re-evaluation.

Direct Manufacturer Equivalents (Recommended Secondary Replacements):

CURB201-G (Comchip Technology) is a direct manufacturer equivalent with identical electrical specifications and fast recovery characteristics. This part is actively manufactured and available in volume, making it suitable for immediate production use.

CGRB201-G (Comchip Technology) is functionally equivalent with 50 V reverse voltage and 2 A current rating in DO-214AA (SMB) package. The forward voltage specification is 1.1 V at 2 A (compared to 1 V for the HS2A), and recovery speed is classified as standard (>500ns) rather than fast recovery. This part is suitable for applications where the slightly higher forward voltage and slower recovery time do not impact circuit performance.

Fast Recovery Alternatives (Diodes Incorporated):

ES2A-13-F provides superior fast recovery characteristics with 25 ns reverse recovery time and lower forward voltage (0.92 V at 2 A). This part is actively manufactured with high inventory availability and is suitable for applications requiring improved switching performance.

Automotive-Qualified Alternatives (Vishay General Semiconductor):

ES2AHE3_A/H, ES2AHE3_A/I, and ES2AHM3/5BT are automotive-grade alternatives with AEC-Q101 qualification. These parts feature fast recovery characteristics, lower forward voltage (0.9 V at 2 A), and reduced capacitance (18 pF at 4 V, 1 MHz). These options are suitable for automotive and mission-critical applications requiring automotive qualification.

Package Variant Consideration:

ES2AA-13-F is electrically equivalent to ES2A-13-F but uses DO-214AC (SMA) package instead of DO-214AA (SMB). This part is suitable only if the circuit board layout accommodates SMA package footprint.

Current-Rated Alternative (Lower Current Application):

RS2A-13-F is rated for 1.5 A average rectified current with 50 V reverse voltage. This part is suitable only for applications where the circuit current requirement does not exceed 1.5 A. The higher forward voltage (1.3 V at 1.5 A) and longer reverse recovery time (150 ns) make this option less suitable for the HS2A's original application envelope.

Higher Current Alternative (Over-Specification):

CGRB301-G is rated for 3 A average rectified current with 50 V reverse voltage in DO-214AA (SMB) package. This part provides current margin above the HS2A specification and is suitable for applications where increased current capacity is required or beneficial for thermal management.

Frequently Asked Questions (FAQ)

Q: Can CURB201-G directly replace HS2A without circuit modification?

A: Yes. CURB201-G is a direct manufacturer equivalent with identical electrical specifications (50 V, 2 A, 1 V forward voltage at 2 A, 50 ns reverse recovery time) and DO-214AA (SMB) package. No circuit modification is required.

Q: What is the difference between CURB201-G and CGRB201-G?

A: Both parts are manufactured by Comchip Technology with 50 V reverse voltage and 2 A current rating in DO-214AA (SMB) package. CURB201-G has fast recovery characteristics (≤ 500ns) with 50 ns reverse recovery time and 1 V forward voltage at 2 A. CGRB201-G has standard recovery characteristics (>500ns) with 1.1 V forward voltage at 2 A. CURB201-G is the closer electrical match to HS2A.

Q: Why are Vishay ES2AHE3 parts listed as alternatives if they have different specifications?

A: ES2AHE3_A/H, ES2AHE3_A/I, and ES2AHM3/5BT meet the primary equivalence criteria (50 V reverse voltage, 2 A current, DO-214AA SMB package, fast recovery). Secondary specifications differ: forward voltage is lower (0.9 V vs. 1 V), reverse recovery time is shorter (20 ns or 30 ns vs. 50 ns), and reverse leakage is higher (10 µA vs. 5 µA). These parts are suitable substitutes for applications where improved switching performance is beneficial or neutral.

Q: Can ES2AA-13-F replace HS2A?

A: ES2AA-13-F is electrically equivalent to ES2A-13-F but uses DO-214AC (SMA) package instead of DO-214AA (SMB). Direct replacement is possible only if the circuit board layout accommodates SMA package footprint. If the board is designed for SMB package, ES2AA-13-F cannot be used without board modification.

Q: Is RS2A-13-F suitable as a replacement for HS2A?

A: RS2A-13-F is not recommended as a direct replacement. Although it shares 50 V reverse voltage rating, it is rated for only 1.5 A average rectified current compared to HS2A's 2 A rating. Additionally, it uses DO-214AC (SMA) package instead of DO-214AA (SMB), and has higher forward voltage (1.3 V at 1.5 A) and longer reverse recovery time (150 ns). This part is suitable only for applications with current requirements not exceeding 1.5 A and compatible package footprint.

Q: What is the advantage of CGRB301-G over HS2A?

A: CGRB301-G is rated for 3 A average rectified current compared to HS2A's 2 A rating, providing 50% additional current capacity. Both parts share 50 V reverse voltage and DO-214AA (SMB) package. CGRB301-G is suitable for applications where increased current capacity is required or where thermal margin improvement is desired. The trade-off is standard recovery speed (>500ns) compared to HS2A's fast recovery (≤ 500ns).

Q: Are all listed substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the HS2A compliance profile.

Q: What does "Fast Recovery ≤ 500ns" mean in practical terms?

A: Fast recovery diodes have reverse recovery time of 500 nanoseconds or less, enabling faster switching transitions and reduced switching losses in high-frequency applications. The HS2A has 50 ns reverse recovery time, which is significantly faster than the 500 ns threshold. Diodes Incorporated ES2A-13-F offers 25 ns recovery time, and Vishay ES2AHE3 variants offer 20-30 ns recovery time, providing even faster switching performance.

Q: Can I use CGRB201-G if my application requires fast recovery characteristics?

A: CGRB201-G is classified as standard recovery (>500ns) rather than fast recovery. If the application circuit specifically requires fast recovery characteristics for proper operation, CGRB201-G is not suitable. In this case, use CURB201-G, ES2A-13-F, or Vishay ES2AHE3 variants, which all provide fast recovery specifications.

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