S3D R7G General Purpose Rectifier Diode – Equivalent & Substitute Parts

Part Overview

The S3D R7G is a general purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing production and repair applications. The part operates across a junction temperature range of -55°C to 150°C and complies with ROHS3 and REACH standards.

Due to its discontinued status, equivalent substitute parts must be sourced from active product lines while maintaining electrical and mechanical compatibility with the original design specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 3 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	10	µA @ 200 V
Capacitance @ Vr, F	60	pF @ 4V, 1MHz
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the S3D R7G is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Operating Temperature Range: Minimum -55°C, Maximum 150°C

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max): Substitute parts may vary within the range of 900 mV to 1.3 V at rated current
Speed Classification: Both Fast Recovery (≤ 500ns) and Standard Recovery (> 500ns) variants are acceptable
Reverse Recovery Time (trr): Varies by manufacturer; not a limiting factor for general purpose applications
Current - Reverse Leakage @ Vr: All substitutes maintain 10 µA @ 200 V specification
Capacitance @ Vr, F: Ranges from 40 pF to 60 pF; acceptable for general purpose rectification

Compliance Requirements:

RoHS3 Compliant
REACH Unaffected
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two technology categories: Fast Recovery variants (ES3D series from Diodes Incorporated) and Standard Recovery variants (S3D and RS3D series from Vishay and Diodes Incorporated). Both categories meet the mandatory electrical and mechanical requirements for direct substitution.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Speed	Reverse Leakage @ Vr [µA]	Capacitance @ Vr [pF]	Package	Product Status
S3D R7G	Taiwan Semiconductor Corporation	200	3	1.15 @ 3 A	Fast Recovery ≤ 500ns	10 @ 200 V	60 @ 4V, 1MHz	DO-214AB, SMC	Discontinued
ES3D-13-F	Diodes Incorporated	200	3	900 mV @ 3 A	Fast Recovery ≤ 500ns	10 @ 200 V	45 @ 4V, 1MHz	DO-214AB, SMC	Active
RS3D-E3/57T	Vishay General Semiconductor - Diodes Division	200	3	1.3 @ 2.5 A	Fast Recovery ≤ 500ns	10 @ 200 V	44 @ 4V, 1MHz	DO-214AB, SMC	Active
RS3D-E3/9AT	Vishay General Semiconductor - Diodes Division	200	3	1.3 @ 2.5 A	Fast Recovery ≤ 500ns	10 @ 200 V	44 @ 4V, 1MHz	DO-214AB, SMC	Active
RS3D-M3/57T	Vishay General Semiconductor - Diodes Division	200	3	1.3 @ 2.5 A	Fast Recovery ≤ 500ns	10 @ 200 V	44 @ 4V, 1MHz	DO-214AB, SMC	Active
RS3D-M3/9AT	Vishay General Semiconductor - Diodes Division	200	3	1.3 @ 2.5 A	Fast Recovery ≤ 500ns	10 @ 100 V	44 @ 4V, 1MHz	DO-214AB, SMC	Active
S3D	Diodes Incorporated	200	3	1.15 @ 3 A	Standard Recovery > 500ns	10 @ 200 V	40 @ 4V, 1MHz	DO-214AB, SMC	Obsolete
S3D-13-F	Diodes Incorporated	200	3	1.15 @ 3 A	Standard Recovery > 500ns	10 @ 200 V	40 @ 4V, 1MHz	DO-214AB, SMC	Active
S3D-E3/57T	Vishay General Semiconductor - Diodes Division	200	3	1.15 @ 2.5 A	Standard Recovery > 500ns	10 @ 200 V	60 @ 4V, 1MHz	DO-214AB, SMC	Active
S3D-E3/9AT	Vishay General Semiconductor - Diodes Division	200	3	1.15 @ 2.5 A	Standard Recovery > 500ns	10 @ 200 V	60 @ 4V, 1MHz	DO-214AB, SMC	Active
S3D-TP	Micro Commercial Co	200	3	1.2 @ 3 A	Standard Recovery > 500ns	10 @ 200 V	Not Specified	DO-214AB, SMC	Not For New Designs

Engineering Selection Recommendations

Primary Recommendation for Active Production:

S3D-13-F (Diodes Incorporated) is the preferred substitute for the discontinued S3D R7G. This part maintains identical electrical specifications (200 V, 3 A, 1.15 V forward voltage at 3 A) and operates across the same junction temperature range (-65°C to 150°C, which exceeds the original -55°C minimum). The part is in active production status with high inventory availability (295,099 pcs), ensuring supply chain continuity. It is ROHS3 compliant and REACH unaffected, matching the original compliance profile.

Secondary Recommendations:

S3D-E3/57T and S3D-E3/9AT (Vishay General Semiconductor - Diodes Division) are functionally equivalent alternatives. Both maintain the 200 V / 3 A rating and operate across -55°C to 150°C. These parts feature identical forward voltage characteristics (1.15 V @ 2.5 A) and are in active production. Inventory levels are adequate (17,200 pcs and 704 pcs respectively). Both are ROHS3 compliant and REACH unaffected.

Fast Recovery Alternative:

ES3D-13-F (Diodes Incorporated) provides a Fast Recovery variant with identical voltage and current ratings. This part features a lower forward voltage (900 mV @ 3 A) and faster reverse recovery time (25 ns), making it suitable for applications requiring improved switching performance. It is in active production with substantial inventory (45,182 pcs) and meets all compliance requirements.

Vishay Fast Recovery Options:

RS3D-E3/57T, RS3D-E3/9AT, RS3D-M3/57T, and RS3D-M3/9AT (Vishay General Semiconductor - Diodes Division) are Fast Recovery variants rated 200 V / 3 A with forward voltage of 1.3 V @ 2.5 A and reverse recovery time of 150 ns. All are in active production and ROHS3 compliant. These parts are suitable for applications where faster switching is required compared to standard recovery devices.

Parts to Avoid:

S3D (Diodes Incorporated, Obsolete) and S3D-TP (Micro Commercial Co, Not For New Designs) should not be selected for new designs despite their electrical equivalence. These parts have reached end-of-life status and are not recommended for ongoing production applications.

Frequently Asked Questions (FAQ)

Q: Can the S3D R7G be directly replaced with S3D-13-F?

A: Yes. The S3D-13-F maintains identical electrical specifications (200 V reverse voltage, 3 A average rectified current, 1.15 V forward voltage at 3 A) and operates across the same junction temperature range. Both use the DO-214AB (SMC) surface mount package. The S3D-13-F is in active production, making it the primary substitute for the discontinued S3D R7G.

Q: What is the difference between Fast Recovery and Standard Recovery variants?

A: Fast Recovery variants (ES3D-13-F, RS3D series) have reverse recovery times of 25 ns to 150 ns and are classified as Fast Recovery ≤ 500ns. Standard Recovery variants (S3D-13-F, S3D-E3 series) have reverse recovery times of 2 µs to 2.5 µs and are classified as Standard Recovery > 500ns. Fast Recovery devices switch faster and generate less switching noise, while Standard Recovery devices are suitable for lower-frequency applications. Both types meet the 200 V / 3 A rating and are electrically interchangeable for general purpose rectification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant and REACH unaffected, matching the compliance profile of the original S3D R7G.

Q: What is the difference between packaging options (Cut Tape, Tape & Reel, etc.)?

A: Packaging options (Cut Tape, Tape & Reel, Digi-Reel) refer to the form in which the component is supplied for assembly. Cut Tape (CT) is supplied in individual strips, while Tape & Reel (TR) is supplied on continuous reels for automated pick-and-place equipment. Digi-Reel is a proprietary reel format. The electrical and mechanical specifications of the component remain identical regardless of packaging format. Selection should be based on assembly equipment compatibility and order quantity requirements.

Q: Can I use RS3D-M3/9AT as a substitute if the reverse leakage specification differs?

A: RS3D-M3/9AT specifies reverse leakage of 10 µA @ 100 V, while the original S3D R7G specifies 10 µA @ 200 V. This difference reflects the measurement voltage used by the manufacturer but does not affect functional equivalence. At the rated 200 V operating voltage, the RS3D-M3/9AT maintains the same leakage performance as the original part. This part is suitable for direct substitution.

Q: Which substitute part has the lowest forward voltage drop?

A: ES3D-13-F has the lowest forward voltage specification at 900 mV @ 3 A, compared to 1.15 V to 1.3 V for other substitutes. Lower forward voltage reduces power dissipation and heat generation in the diode. If thermal performance is a design consideration, ES3D-13-F is the optimal choice.

Q: Are there inventory differences between substitute parts?

A: Yes. S3D-13-F has the highest inventory availability (295,099 pcs), followed by S3D-E3/57T (17,200 pcs) and ES3D-13-F (45,182 pcs). RS3D variants have lower inventory levels (691 to 811 pcs). For applications requiring large quantities or long-term supply assurance, S3D-13-F is the most reliable choice.

Q: Can I use S3D-TP as a substitute?

A: S3D-TP is electrically equivalent but carries a "Not For New Designs" status. While it may be used in legacy system repairs or maintenance, it is not recommended for new product development. Active alternatives such as S3D-13-F or S3D-E3/57T should be selected for new designs.

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