S2D Equivalent & Substitute Parts

Part Overview

The onsemi S2D is a general-purpose rectifier diode rated for 200 V DC reverse voltage and 2 A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary for design continuity, legacy system support, and procurement of functionally compatible alternatives that meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 2 A	V
Reverse Recovery Time (trr)	2	µs
Current - Reverse Leakage @ Vr	1	µA @ 200 V
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the S2D rectifier diode is determined by the following critical parameters:

Voltage Rating: The substitute part must support a minimum DC reverse voltage (Vr) of 200 V. Parts with higher voltage ratings (such as 400 V) are not direct substitutes due to different electrical characteristics and are excluded from this equivalency list.

Current Rating: The substitute part must support a minimum average rectified current (Io) of 2 A. Parts rated below 2 A (such as 1 A devices) cannot reliably replace the S2D in applications requiring full 2 A operation.

Package and Mounting: All substitute parts must use the DO-214AA (SMB) surface mount package to ensure mechanical and thermal compatibility with existing PCB layouts and assembly processes.

Forward Voltage: Forward voltage drop (Vf) at rated current affects power dissipation and circuit performance. Substitutes with significantly lower Vf values (such as 900 mV versus 1.15 V) represent improved performance characteristics but remain functionally compatible.

Recovery Characteristics: Both standard recovery (>500 ns) and fast recovery (≤500 ns) devices are acceptable substitutes, as recovery speed does not prevent functional replacement in general-purpose rectification applications.

Compliance and Status: All substitute parts listed are RoHS3 compliant and carry active product status or equivalent automotive qualification, ensuring long-term availability and regulatory compliance.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs/ns]	Ir @ Vr [µA]	Package	Status
S2D	onsemi	200	2	1.15 @ 2A	2 µs	1 @ 200V	DO-214AA (SMB)	Not For New Designs
NRVS2D	onsemi	200	2	1.15 @ 2A	2 µs	1 @ 200V	DO-214AA (SMB)	Not For New Designs (AEC-Q101)
CGRB203-G	Comchip Technology	200	2	1.1 @ 2A	Standard Recovery	5 @ 200V	DO-214AA (SMB)	Active
ER2D-LTP	Micro Commercial Co	200	2	0.95 @ 2A	35 ns	5 @ 200V	DO-214AA (SMB)	Active
ES2D-13-F	Diodes Incorporated	200	2	0.92 @ 2A	25 ns	5 @ 200V	DO-214AA (SMB)	Active
ES2D-E3/5BT	Vishay General Semiconductor	200	2	0.90 @ 2A	30 ns	10 @ 200V	DO-214AA (SMB)	Active
ES2D-M3/52T	Vishay General Semiconductor	200	2	0.90 @ 2A	30 ns	10 @ 200V	DO-214AA (SMB)	Active

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

The NRVS2D from onsemi is a parametric equivalent to the S2D, matching all critical electrical specifications including 200 V reverse voltage, 2 A current rating, 1.15 V forward voltage, and 2 µs reverse recovery time. The NRVS2D carries AEC-Q101 automotive qualification and is available in Tape & Reel packaging. Although also classified as "Not For New Designs," this part provides identical performance characteristics for legacy system support.

Active Product Alternatives (Recommended for New Designs):

For applications requiring an active product status, the following parts provide full electrical compatibility with the S2D:

CGRB203-G (Comchip Technology) maintains the 200 V / 2 A specification with standard recovery characteristics and is currently in active production status.

ER2D-LTP (Micro Commercial Co) offers improved fast recovery performance (35 ns) with lower forward voltage (0.95 V @ 2 A) and extended operating temperature range to 175°C, while maintaining full 200 V / 2 A ratings.

ES2D-13-F (Diodes Incorporated) provides the lowest forward voltage (0.92 V @ 2 A) and fastest recovery time (25 ns) among active alternatives, reducing power dissipation in high-frequency applications.

ES2D-E3/5BT and ES2D-M3/52T (Vishay General Semiconductor) are functionally identical variants with 0.90 V forward voltage and 30 ns recovery time, available in different packaging configurations.

All recommended alternatives are RoHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are suitable for direct PCB substitution without layout modification.

Frequently Asked Questions (FAQ)

Q: Can I use a 1 A rated diode as a substitute for the S2D 2 A diode?

A: No. Parts such as CMR1-02 and ER1D-LTP are rated for 1 A maximum current and cannot reliably handle 2 A operation. Using an undersized current rating creates thermal stress and reduces component lifetime. Only parts rated for 2 A or higher are acceptable substitutes.

Q: What is the difference between standard recovery and fast recovery versions?

A: Standard recovery diodes (>500 ns reverse recovery time) are suitable for low-frequency rectification and general-purpose applications. Fast recovery diodes (≤500 ns) are optimized for higher switching frequencies and reduce switching losses. Both types are functionally compatible with the S2D in general-purpose rectification circuits, but fast recovery variants offer improved efficiency in switching power supplies.

Q: Can I substitute a 400 V rated diode for the 200 V S2D?

A: While a 400 V diode such as MRS1504T3G will not fail due to overvoltage, it is not a direct substitute. Higher voltage ratings result in different junction capacitance, leakage current, and forward voltage characteristics. The MRS1504T3G is rated for only 1.5 A, making it unsuitable for 2 A applications. Use only 200 V rated parts for direct replacement.

Q: Are all substitute parts available in the same DO-214AA package?

A: Yes. All substitute parts listed in this reference are available in the DO-214AA (SMB) surface mount package, ensuring mechanical compatibility with existing PCB designs. Packaging variants (Tape & Reel, Cut Tape, Bulk) do not affect electrical performance or physical footprint.

Q: What is the significance of the lower forward voltage in newer alternatives?

A: Lower forward voltage (0.90 V to 0.95 V versus 1.15 V) reduces power dissipation during conduction, resulting in lower junction temperature and improved thermal performance. This is a beneficial characteristic that does not compromise compatibility. Circuits designed for the S2D will operate correctly with lower-Vf alternatives.

Q: Is the NRVS2D suitable for automotive applications?

A: Yes. The NRVS2D carries AEC-Q101 automotive qualification, making it suitable for automotive and high-reliability applications. The base S2D does not carry automotive qualification. If automotive compliance is required, NRVS2D is the appropriate equivalent.

Q: Can I mix different substitute parts in the same circuit?

A: Yes. All listed substitute parts meet the same 200 V / 2 A electrical specifications and DO-214AA package requirements. Mixing different manufacturers' parts in the same circuit is acceptable from an electrical standpoint, though design documentation should reflect the specific part used for traceability and future maintenance.

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