S4D M6G Equivalent & Substitute Parts

Part Overview

The S4D M6G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 4 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 that maintain electrical and mechanical compatibility for new designs or production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	4	A
Voltage - Forward (Vf) (Max) @ If	1.15 @ 4 A	V
Speed	Standard Recovery >500ns, > 200mA (Io)	-
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	100	µA @ 200 V
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 S4D M6G is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): 200 V minimum
Package / Case: DO-214AB (SMC) surface mount
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Current Rating Considerations: Substitute parts are grouped into two categories based on average rectified current (Io):

Direct Current Rating Match (4 A): CGRC503-G provides identical 4 A rating with 200 V reverse voltage in DO-214AB package.
Lower Current Rating (3 A): ER3D-TP, ES3D-13-F, ES3DB-13-F, MURS320-13-F, MURS320-E3/57T, MURS320-E3/9AT, MURS320-M3/57T, MURS320-M3/9AT, and MURS320HE3_A/H all operate at 3 A with 200 V reverse voltage. These are suitable for applications where the circuit design accommodates the reduced current capacity.

Recovery Speed Characteristics: The S4D M6G operates with standard recovery characteristics (>500 ns). Substitute parts with fast recovery characteristics (≤500 ns) offer improved switching performance but remain electrically compatible at the specified voltage and current levels.

Package Variation: ES3DB-13-F uses DO-214AA (SMB) package instead of DO-214AB (SMC), requiring PCB layout modification and is not recommended for direct board-level substitution without redesign.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [µs/ns]	Ir @ Vr [µA]	Package	Status
S4D M6G	Taiwan Semiconductor	200	4	1.15 @ 4 A	Standard >500ns	1.5 µs	100 @ 200 V	DO-214AB	Discontinued
CGRC503-G	Comchip Technology	200	5	1.15 @ 5 A	Standard >500ns	-	10 @ 200 V	DO-214AB	Active
ER3D-TP	Micro Commercial Co	200	3	950 mV @ 3 A	Fast ≤500ns	35 ns	5 @ 200 V	DO-214AB	Active
ES3D-13-F	Diodes Incorporated	200	3	900 mV @ 3 A	Fast ≤500ns	25 ns	10 @ 200 V	DO-214AB	Active
ES3DB-13-F	Diodes Incorporated	200	3	900 mV @ 3 A	Fast ≤500ns	25 ns	10 @ 200 V	DO-214AA	Active
MURS320-13-F	Vishay General Semiconductor	200	3	875 mV @ 3 A	Fast ≤500ns	25 ns	5 @ 200 V	DO-214AB	Active
MURS320-E3/57T	Vishay General Semiconductor	200	3	875 mV @ 3 A	Fast ≤500ns	35 ns	5 @ 200 V	DO-214AB	Active
MURS320-E3/9AT	Vishay General Semiconductor	200	3	875 mV @ 3 A	Fast ≤500ns	35 ns	5 @ 200 V	DO-214AB	Active
MURS320-M3/57T	Vishay General Semiconductor	200	3	875 mV @ 3 A	Fast ≤500ns	35 ns	5 @ 200 V	DO-214AB	Active
MURS320-M3/9AT	Vishay General Semiconductor	200	3	875 mV @ 3 A	Fast ≤500ns	35 ns	5 @ 200 V	DO-214AB	Active
MURS320HE3_A/H	Vishay General Semiconductor	200	3	875 mV @ 3 A	Fast ≤500ns	35 ns	5 @ 200 V	DO-214AB	Active

Engineering Selection Recommendations

Primary Substitute - Current Rating Match:

CGRC503-G (Comchip Technology) is the preferred substitute when direct current capacity replacement is required. This part maintains the 200 V reverse voltage specification, provides 5 A average rectified current (exceeding the original 4 A requirement), operates in the identical DO-214AB package, and holds Active product status with ROHS3 compliance. The forward voltage characteristic (1.15 V @ 5 A) matches the original specification.

Secondary Substitutes - Reduced Current Rating:

When circuit design permits operation at 3 A average rectified current, the following parts are suitable alternatives:

ER3D-TP (Micro Commercial Co): Active status, fast recovery characteristics (35 ns), lowest forward voltage among 3 A options (950 mV @ 3 A), extended operating temperature range (-50°C to 175°C), high inventory availability (16,840 pcs).
ES3D-13-F (Diodes Incorporated): Active status, fast recovery (25 ns), low forward voltage (900 mV @ 3 A), standard operating temperature range (-55°C to 150°C), high inventory availability (45,182 pcs).
MURS320-13-F (Vishay General Semiconductor): Active status, fast recovery (25 ns), lowest forward voltage (875 mV @ 3 A), extended operating temperature range (-65°C to 175°C), moderate inventory availability (7,630 pcs).
MURS320HE3_A/H (Vishay General Semiconductor): Active status, automotive-grade qualification (AEC-Q101), fast recovery (35 ns), extended operating temperature range (-65°C to 175°C), suitable for automotive applications requiring component traceability.

Package Compatibility Note:

ES3DB-13-F uses DO-214AA (SMB) package and is not recommended for direct substitution without PCB redesign, as it requires different land pattern and mounting footprint compared to the DO-214AB (SMC) package of the original part.

Frequently Asked Questions (FAQ)

Q: Can CGRC503-G directly replace S4D M6G without circuit modification?

A: Yes. CGRC503-G maintains identical voltage rating (200 V), package (DO-214AB), and forward voltage characteristic (1.15 V @ 5 A). The higher current rating (5 A vs. 4 A) provides additional margin and does not require circuit changes.

Q: Why are 3 A rated diodes listed as substitutes for a 4 A part?

A: Substitution at reduced current rating is valid when circuit design analysis confirms that peak and average current demands do not exceed 3 A. The 200 V voltage rating and DO-214AB package remain compatible. Circuit redesign or derating analysis is required to confirm suitability.

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

A: The S4D M6G operates with standard recovery (>500 ns, 1.5 µs trr). Substitute parts with fast recovery (≤500 ns, 25-35 ns trr) exhibit reduced reverse recovery time, resulting in lower switching losses and improved efficiency. Both types are electrically compatible at the specified voltage and current levels.

Q: Is ES3DB-13-F a suitable direct replacement?

A: No. ES3DB-13-F uses DO-214AA (SMB) package instead of DO-214AB (SMC). While electrical specifications are compatible, the different package requires PCB layout modification and is not suitable for direct board-level substitution.

Q: What does AEC-Q101 qualification on MURS320HE3_A/H indicate?

A: AEC-Q101 is an automotive electronics qualification standard. MURS320HE3_A/H is qualified for automotive applications and includes enhanced traceability and reliability documentation. This part is suitable for automotive designs requiring component qualification verification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental compliance status of the original S4D M6G.

Q: Which substitute offers the lowest forward voltage drop?

A: MURS320-13-F provides the lowest forward voltage at 875 mV @ 3 A, compared to 900 mV for ES3D-13-F and 950 mV for ER3D-TP. Lower forward voltage reduces power dissipation in rectification circuits.

Q: What is the difference between MURS320 variants (E3/57T, E3/9AT, M3/57T, M3/9AT)?

A: These designations indicate different packaging and tape configurations. All variants maintain identical electrical specifications (200 V, 3 A, 875 mV Vf). Selection depends on procurement requirements: E3/57T and E3/9AT are standard variants; M3/57T and M3/9AT are alternative packaging options. Consult supplier documentation for specific tape and reel specifications.

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