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 diode features fast recovery characteristics with a reverse recovery time of 50 ns and is designed for standard rectification applications requiring surface mount technology.

The HS2A has been discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain functional compatibility with existing designs. Equivalent parts are available from multiple manufacturers with identical or superior electrical characteristics and the same package footprint.

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

Substitute parts for the HS2A are classified based on strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io): 2 A minimum
Package / Case: DO-214AA (SMB) surface mount footprint
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C minimum
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Direct Equivalents maintain identical electrical specifications including forward voltage, reverse recovery time, and capacitance characteristics. These parts are pin-compatible and functionally interchangeable without circuit modification.

Compatible Substitutes meet or exceed the primary electrical requirements but may differ in secondary parameters such as reverse recovery time or forward voltage within acceptable operating margins. These parts are suitable for applications where the HS2A specifications define the minimum acceptable performance threshold.

Similar Parts share the same package and voltage rating but differ in current rating or recovery speed classification. These are listed for reference in applications where design flexibility permits parameter variation.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed Classification	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
ES2A-13-F	Diodes Incorporated	50	2	0.92 @ 2A	Fast Recovery ≤ 500ns	25	5 @ 50V	DO-214AA (SMB)	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
CGRB201-G	Comchip Technology	50	2	1.1 @ 2A	Standard Recovery >500ns	—	5 @ 50V	DO-214AA (SMB)	Active

Engineering Selection Recommendations

Direct Equivalent Selection:

The HS2A (Active status) from Taiwan Semiconductor Corporation is the primary direct equivalent, maintaining identical electrical specifications and product status. This part is recommended as the first choice for direct replacement in new procurement.

CURB201-G from Comchip Technology is a direct electrical equivalent with identical voltage, current, forward voltage, and recovery time specifications. This part is actively manufactured and available in volume quantities (991 pcs in stock).

Compatible Substitute Selection:

ES2A-13-F from Diodes Incorporated meets all primary substitution criteria with superior reverse recovery time (25 ns versus 50 ns) and lower forward voltage (0.92 V versus 1 V). This part is actively manufactured with high inventory availability (10,400 pcs in stock) and is ROHS3 compliant.

ES2AHE3_A/H and ES2AHE3_A/I from Vishay General Semiconductor - Diodes Division are AEC-Q101 qualified automotive-grade parts with superior reverse recovery time (20 ns) and lower forward voltage (0.9 V). These parts are suitable for applications requiring automotive qualification. Inventory availability is limited (1,038 pcs and 666 pcs respectively).

ES2AHM3/5BT from Vishay General Semiconductor - Diodes Division is a non-automotive variant with equivalent electrical performance to the automotive-qualified parts, featuring 30 ns reverse recovery time and 0.9 V forward voltage.

Alternative Consideration:

CGRB201-G from Comchip Technology is a compatible substitute with standard recovery speed classification (>500ns). This part is suitable for applications where fast recovery characteristics are not critical. Forward voltage is slightly elevated at 1.1 V versus 1 V.

Compliance Verification:

All recommended substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, and REACH unaffected status, matching the original HS2A specifications.

Frequently Asked Questions (FAQ)

Q: Can CURB201-G directly replace HS2A in existing designs?

A: Yes. CURB201-G is a direct electrical equivalent with identical voltage rating (50 V), current rating (2 A), forward voltage (1 V @ 2 A), reverse recovery time (50 ns), and DO-214AA (SMB) package footprint. No circuit modifications are required.

Q: What is the difference between ES2A-13-F and the original HS2A?

A: ES2A-13-F meets all primary substitution criteria but offers improved performance characteristics: reverse recovery time is 25 ns (versus 50 ns) and forward voltage is 0.92 V (versus 1 V). These improvements reduce switching losses and heat generation. The part is pin-compatible with identical package footprint.

Q: Are the Vishay ES2AHE3 parts suitable for non-automotive applications?

A: Yes. The ES2AHE3_A/H and ES2AHE3_A/I parts are AEC-Q101 qualified automotive-grade components but are functionally suitable for general-purpose rectification applications. The automotive qualification provides additional quality assurance and traceability. These parts offer superior reverse recovery time (20 ns) and lower forward voltage (0.9 V) compared to the original HS2A.

Q: Why is CGRB201-G listed as a compatible substitute rather than a direct equivalent?

A: CGRB201-G is classified as a compatible substitute because it uses standard recovery speed classification (>500ns) rather than fast recovery (≤500ns). While it meets the primary voltage and current requirements with identical forward voltage, the recovery speed difference may affect switching performance in high-frequency applications. For applications where recovery speed is not critical, CGRB201-G is fully compatible.

Q: What is the significance of the DO-214AA (SMB) package specification?

A: The DO-214AA (SMB) package is a surface mount package with a specific footprint and pin configuration. All recommended substitute parts use this identical package, ensuring mechanical and electrical compatibility with existing PCB layouts. No PCB redesign is required when substituting parts within this package family.

Q: Can RS2A-13-F be used as a substitute for HS2A?

A: No. RS2A-13-F has a lower current rating of 1.5 A compared to the HS2A requirement of 2 A. While it shares the same 50 V voltage rating, the reduced current capacity makes it unsuitable for applications requiring 2 A rectified current. Additionally, RS2A-13-F uses a DO-214AC (SMA) package rather than DO-214AA (SMB), requiring PCB layout changes.

Q: What is the advantage of lower reverse recovery time in substitute parts?

A: Lower reverse recovery time (trr) reduces switching losses and heat dissipation during diode switching transitions. Parts such as ES2A-13-F (25 ns) and Vishay ES2AHE3 variants (20 ns) offer improved efficiency compared to the original HS2A (50 ns). This is particularly beneficial in high-frequency switching applications and power supply designs where thermal management is critical.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts listed in this reference maintain ROHS3 compliance status, matching the original HS2A specification. This ensures compatibility with environmental regulations and procurement requirements.

Q: What inventory considerations should guide part selection?

A: ES2A-13-F from Diodes Incorporated offers the highest inventory availability (10,400 pcs in stock) with superior electrical performance. CURB201-G from Comchip Technology (991 pcs in stock) provides a direct electrical equivalent. Vishay automotive-qualified parts (ES2AHE3_A/H with 1,038 pcs and ES2AHE3_A/I with 666 pcs) are suitable for applications requiring automotive qualification but have more limited availability.

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