Equivalent & Substitute Parts for S2D/54 General Purpose Rectifier Diode

Part Overview

The S2D/54 is a general purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 200 V DC reverse voltage and 1.5 A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as Active product status and is designed for standard recovery applications with a reverse recovery time of 2 µs. The S2D/54 is RoHS non-compliant, which may necessitate identification of compliant alternatives for applications requiring regulatory adherence or long-term supply chain stability.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.15 @ 1.5 A	V
Reverse Recovery Time (trr)	2	µs
Current - Reverse Leakage @ Vr	1	µA @ 200 V
Capacitance @ Vr, F	16	pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution of the S2D/54 is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 1.5 A
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: 1.15 V @ 1.5 A or lower
Reverse Recovery Time (trr): Standard recovery characteristics (>500 ns) or faster
Operating Temperature Range: Minimum -55°C to maximum 150°C or broader
RoHS Compliance Status: Noted for regulatory requirements

Substitute parts are grouped into two categories:

Category 1: Parametric Equivalents (Identical Electrical Specifications) Parts S2D-E3/52T and S2D-E3/5BT maintain identical electrical characteristics to the S2D/54 with differences only in packaging format (Cut Tape vs. Tape & Reel). Both are ROHS3 Compliant.

Category 2: Manufacturer Recommended Substitutes (Functional Equivalents with Specification Variations) Parts S2D (Diotec), S2D-13-F (Diodes Incorporated), STTH1R02U, STTH2R02U, STTH4R02U, and STTH4R02UY provide functional equivalence at 200 V with variations in current rating, recovery speed, forward voltage, or temperature range. These parts are ROHS3 Compliant and represent alternative sourcing options.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs/ns]	Package	RoHS Status	Tj (Max) [°C]
S2D/54	Vishay General Semiconductor	200	1.5	1.15 @ 1.5 A	2 µs	DO-214AA, SMB	Non-compliant	150
S2D-E3/52T	Vishay General Semiconductor	200	1.5	1.15 @ 1.5 A	2 µs	DO-214AA, SMB	ROHS3 Compliant	150
S2D-E3/5BT	Vishay General Semiconductor	200	1.5	1.15 @ 1.5 A	2 µs	DO-214AA, SMB	ROHS3 Compliant	150
S2D	Diotec Semiconductor	200	2	1.15 @ 2 A	1.5 µs	DO-214AA, SMB	ROHS3 Compliant	150
S2D-13-F	Diodes Incorporated	200	1.5	1.15 @ 1.5 A	Standard Recovery	DO-214AA, SMB	ROHS3 Compliant	150
STTH1R02U	STMicroelectronics	200	1.5	1 @ 1.5 A	30 ns	DO-214AA, SMB	ROHS3 Compliant	175
STTH2R02U	STMicroelectronics	200	2	1 @ 2 A	30 ns	DO-214AA, SMB	ROHS3 Compliant	175
STTH4R02U	STMicroelectronics	200	4	1.05 @ 4 A	30 ns	DO-214AA, SMB	ROHS3 Compliant	175
STTH4R02UY	STMicroelectronics	200	4	1.05 @ 4 A	30 ns	DO-214AA, SMB	ROHS3 Compliant	175

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): S2D-E3/52T and S2D-E3/5BT are parametric equivalents to the S2D/54 with identical electrical performance. Selection between these two depends on packaging requirements: S2D-E3/52T is supplied in Cut Tape format, while S2D-E3/5BT is supplied in Tape & Reel format. Both are ROHS3 Compliant, providing regulatory advantage over the original S2D/54.

For RoHS Compliance Upgrade: If regulatory compliance is required, S2D-E3/52T or S2D-E3/5BT provide drop-in replacements with ROHS3 Compliant status while maintaining identical electrical specifications.

For Enhanced Performance (Faster Recovery): STTH1R02U provides identical 1.5 A current rating at 200 V with significantly faster recovery time (30 ns vs. 2 µs), lower forward voltage (1 V vs. 1.15 V), and extended maximum junction temperature (175°C vs. 150°C). This part is suitable for applications requiring improved switching performance and thermal margin.

For Higher Current Applications: STTH2R02U and STTH4R02U provide 2 A and 4 A ratings respectively at 200 V, with fast recovery characteristics and ROHS3 Compliance. These are suitable for applications requiring higher current capacity than the 1.5 A specification.

For Automotive Applications: STTH4R02UY is qualified for automotive use (Grade: Automotive) with extended operating temperature range (-40°C to 175°C) and provides 4 A current capacity at 200 V with fast recovery characteristics.

Frequently Asked Questions (FAQ)

Q: Can S2D-E3/52T or S2D-E3/5BT be used as direct replacements for S2D/54?

A: Yes. S2D-E3/52T and S2D-E3/5BT are parametric equivalents with identical voltage rating (200 V), current rating (1.5 A), forward voltage (1.15 V @ 1.5 A), reverse recovery time (2 µs), and operating temperature range (-55°C to 150°C). The only differences are packaging format (Cut Tape vs. Tape & Reel) and RoHS compliance status (ROHS3 Compliant vs. non-compliant).

Q: What is the difference between S2D-E3/52T and S2D-E3/5BT?

A: Both parts are electrically identical. S2D-E3/52T is supplied in Cut Tape (CT) packaging, while S2D-E3/5BT is supplied in Tape & Reel (TR) packaging. Selection depends on assembly process requirements and volume needs.

Q: Can STTH1R02U replace S2D/54 in all applications?

A: STTH1R02U is electrically compatible at the same 200 V and 1.5 A ratings with superior performance characteristics: lower forward voltage (1 V vs. 1.15 V), faster recovery time (30 ns vs. 2 µs), and higher maximum junction temperature (175°C vs. 150°C). It is suitable for replacement in applications where these improved characteristics do not create circuit incompatibilities. Verification of circuit behavior is necessary if the application depends on the specific recovery time characteristics of standard recovery diodes.

Q: What is the difference between STTH2R02U and STTH4R02U?

A: Both parts are manufactured by STMicroelectronics with identical 200 V voltage rating and fast recovery characteristics (30 ns). STTH2R02U is rated for 2 A average rectified current, while STTH4R02U is rated for 4 A. Forward voltage is 1 V @ 2 A for STTH2R02U and 1.05 V @ 4 A for STTH4R02U. Selection depends on the required current capacity of the application.

Q: Is STTH4R02UY different from STTH4R02U?

A: STTH4R02UY is the automotive-grade variant of STTH4R02U. Both have identical electrical specifications (200 V, 4 A, 30 ns recovery time). STTH4R02UY includes automotive qualification (Grade: Automotive) and extended operating temperature range (-40°C to 175°C) compared to STTH4R02U (maximum 175°C). STTH4R02UY is suitable for automotive applications requiring AEC qualification.

Q: Can I use S2D (Diotec) as a replacement for S2D/54?

A: S2D (Diotec) is rated for 200 V and 2 A, which exceeds the 1.5 A requirement of S2D/54. It has identical forward voltage specification (1.15 V @ 2 A) and faster recovery time (1.5 µs vs. 2 µs). It is ROHS3 Compliant. This part is suitable for replacement in applications where the higher current rating does not create circuit incompatibilities.

Q: What does "Standard Recovery" mean compared to "Fast Recovery"?

A: Standard Recovery refers to diodes with reverse recovery time greater than 500 ns (S2D/54 has 2 µs). Fast Recovery refers to diodes with reverse recovery time less than or equal to 500 ns (STMicroelectronics STTH series has 30 ns). Fast recovery diodes switch more quickly and generate less reverse current, making them suitable for high-frequency applications. Standard recovery diodes are adequate for lower-frequency applications.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed (S2D-E3/52T, S2D-E3/5BT, S2D, S2D-13-F, STTH1R02U, STTH2R02U, STTH4R02U, STTH4R02UY) are ROHS3 Compliant. The original S2D/54 is RoHS non-compliant. For applications requiring RoHS compliance, any of the listed substitutes are suitable.

Q: Can I use a higher current rated diode (2 A or 4 A) in place of the 1.5 A S2D/54?

A: Yes, provided the application circuit does not depend on the specific current rating for circuit operation. Higher current rated diodes at the same voltage rating are generally suitable for replacement in applications operating below their rated current. Verification that forward voltage characteristics and recovery time do not create circuit incompatibilities is necessary.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) packaging supplies individual diodes on tape that must be cut during assembly. Tape & Reel (TR) packaging supplies diodes on continuous tape wound on a reel for automated pick-and-place assembly. Selection depends on assembly process capability and volume requirements.

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