ESH3D M6G Equivalent & Substitute Parts

Part Overview

The ESH3D M6G 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 surface mount DO-214AB (SMC) package. This component is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement requirements. The part operates across a junction temperature range of -55°C to 175°C and features fast recovery characteristics with a 20 ns reverse recovery time, making it suitable for switching power supply and rectification applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	900 mV @ 3 A	mV
Reverse Recovery Time (trr)	20	ns
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 175	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the ESH3D M6G is determined by strict electrical and mechanical parameter matching within the rectifier diode category. The primary substitution criteria are:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: 900 mV @ 3 A (tolerance range acceptable)
Reverse Recovery Time (trr): 20 ns nominal (variations within fast recovery specification acceptable)
Current - Reverse Leakage @ Vr: 5 µA @ 200 V (variations acceptable within standard limits)
Operating Temperature - Junction: -55°C to 175°C minimum range
RoHS3 Compliance and MSL 1 rating

Substitute parts are grouped into two categories:

Category A - Direct Electrical and Package Equivalents (DO-214AB SMC): Parts matching all mandatory parameters with identical or superior electrical characteristics and the same DO-214AB SMC package footprint.

Category B - Functional Equivalents with Package Variation (DO-214AA SMB): Parts matching all electrical parameters but utilizing an alternative surface mount package (SMB instead of SMC), requiring PCB layout modification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	trr [ns]	Ir @ Vr [µA]	Package	Speed	Tj Range [°C]	Product Status
ESH3D M6G	Taiwan Semiconductor Corporation	200	3	900 @ 3A	20	5 @ 200V	DO-214AB, SMC	Fast Recovery ≤ 500ns	-55 to 175	Discontinued
ER3D-TP	Micro Commercial Co	200	3	950 @ 3A	35	5 @ 200V	DO-214AB, SMC	Fast Recovery ≤ 500ns	-50 to 175	Active
ES3D	Diotec Semiconductor	200	3	900 @ 3A	20	5 @ 200V	DO-214AB, SMC	Fast Recovery ≤ 500ns	-50 to 150	Active
ES3D-13-F	Diodes Incorporated	200	3	900 @ 3A	25	10 @ 200V	DO-214AB, SMC	Fast Recovery ≤ 500ns	-55 to 150	Active
ES3DB-13-F	Diodes Incorporated	200	3	900 @ 3A	25	10 @ 200V	DO-214AA, SMB	Fast Recovery ≤ 500ns	-55 to 150	Active
MURS320-13-F	Diodes Incorporated	200	3	875 @ 3A	25	5 @ 200V	DO-214AB, SMC	Fast Recovery ≤ 500ns	-65 to 175	Active
MURS320-E3/57T	Vishay General Semiconductor - Diodes Division	200	3	875 @ 3A	35	5 @ 200V	DO-214AB, SMC	Fast Recovery ≤ 500ns	-65 to 175	Active
MURS320-E3/9AT	Vishay General Semiconductor - Diodes Division	200	3	875 @ 3A	35	5 @ 200V	DO-214AB, SMC	Fast Recovery ≤ 500ns	-65 to 175	Active
MURS320-M3/57T	Vishay General Semiconductor - Diodes Division	200	3	875 @ 3A	35	5 @ 200V	DO-214AB, SMC	Fast Recovery ≤ 500ns	-65 to 175	Active
MURS320-M3/9AT	Vishay General Semiconductor - Diodes Division	200	3	875 @ 3A	35	5 @ 200V	DO-214AB, SMC	Fast Recovery ≤ 500ns	-65 to 175	Active
CGRC503-G	Comchip Technology	200	5	1150 @ 5A	—	10 @ 200V	DO-214AB, SMC	Standard Recovery >500ns	—	Active

Engineering Selection Recommendations

Primary Substitute Recommendations (Category A - Direct Equivalents):

The following parts are recommended as direct substitutes for the ESH3D M6G based on matching electrical specifications, identical DO-214AB SMC package, and active product status:

ES3D (Diotec Semiconductor) - Identical electrical characteristics (200 V, 3 A, 900 mV Vf, 20 ns trr) with DO-214AB SMC package. Operating temperature range -50°C to 150°C. RoHS3 compliant. High inventory availability (131,200 pcs).
ES3D-13-F (Diodes Incorporated) - Matching voltage and current ratings (200 V, 3 A, 900 mV Vf) with DO-214AB SMC package. Reverse recovery time 25 ns. Operating temperature range -55°C to 150°C. RoHS3 compliant. High inventory availability (45,182 pcs).
MURS320-13-F (Diodes Incorporated) - Meets all electrical requirements (200 V, 3 A, 875 mV Vf, 25 ns trr) with DO-214AB SMC package. Extended operating temperature range -65°C to 175°C matches original part specification. RoHS3 compliant. Moderate inventory availability (7,630 pcs).
MURS320-E3/57T (Vishay General Semiconductor - Diodes Division) - Meets all electrical requirements (200 V, 3 A, 875 mV Vf, 35 ns trr) with DO-214AB SMC package. Extended operating temperature range -65°C to 175°C. RoHS3 compliant. Moderate inventory availability (2,728 pcs).
MURS320-E3/9AT (Vishay General Semiconductor - Diodes Division) - Meets all electrical requirements (200 V, 3 A, 875 mV Vf, 35 ns trr) with DO-214AB SMC package. Extended operating temperature range -65°C to 175°C. RoHS3 compliant. Moderate inventory availability (3,568 pcs).
MURS320-M3/57T (Vishay General Semiconductor - Diodes Division) - Meets all electrical requirements (200 V, 3 A, 875 mV Vf, 35 ns trr) with DO-214AB SMC package. Extended operating temperature range -65°C to 175°C. RoHS3 compliant. Limited inventory availability (978 pcs).
MURS320-M3/9AT (Vishay General Semiconductor - Diodes Division) - Meets all electrical requirements (200 V, 3 A, 875 mV Vf, 35 ns trr) with DO-214AB SMC package. Extended operating temperature range -65°C to 175°C. RoHS3 compliant. Limited inventory availability (933 pcs).
ER3D-TP (Micro Commercial Co) - Meets voltage and current ratings (200 V, 3 A) with DO-214AB SMC package. Forward voltage 950 mV @ 3 A and reverse recovery time 35 ns. Operating temperature range -50°C to 175°C. RoHS3 compliant. High inventory availability (16,840 pcs).

Secondary Substitute Recommendation (Category B - Package Variant):

ES3DB-13-F (Diodes Incorporated) - Functionally equivalent to ESH3D M6G with identical electrical specifications (200 V, 3 A, 900 mV Vf, 25 ns trr) but packaged in DO-214AA SMB instead of DO-214AB SMC. Requires PCB layout modification. Operating temperature range -55°C to 150°C. RoHS3 compliant. High inventory availability (32,100 pcs).

Not Recommended:

CGRC503-G (Comchip Technology) is not recommended as a substitute. Although it shares the 200 V rating and DO-214AB SMC package, it is rated for 5 A average rectified current (exceeding the 3 A requirement) and exhibits standard recovery characteristics (>500ns) rather than the fast recovery specification (≤500ns) of the original part. Additionally, forward voltage is specified at 1150 mV @ 5 A, which is not directly comparable to the 3 A operating point.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher current rating (5 A) instead of the 3 A ESH3D M6G?

A: Higher current-rated diodes are not recommended as direct substitutes. The ESH3D M6G is specified for 3 A average rectified current. Using a 5 A rated device introduces unnecessary design margin and may alter circuit performance characteristics, particularly in switching applications where recovery time and forward voltage characteristics are critical. Select a substitute rated for 3 A.

Q: What is the significance of the "Fast Recovery ≤ 500ns" specification?

A: Fast recovery classification indicates the diode's reverse recovery time is 500 nanoseconds or less at currents exceeding 200 mA. This characteristic is essential for switching power supply applications where rapid diode turn-off prevents excessive reverse current and switching losses. Substitutes must maintain this fast recovery classification to ensure equivalent circuit performance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts listed carry RoHS3 compliance certification, matching the environmental compliance status of the original ESH3D M6G. All parts are also MSL 1 rated (Unlimited moisture sensitivity level) or equivalent, ensuring compatibility with standard PCB assembly processes.

Q: What is the difference between DO-214AB (SMC) and DO-214AA (SMB) packages?

A: DO-214AB (SMC) and DO-214AA (SMB) are both surface mount diode packages with different physical dimensions. SMC is smaller than SMB. The ES3DB-13-F is packaged in SMB (DO-214AA) instead of SMC (DO-214AB). If your PCB layout is designed for SMC footprints, SMB substitution requires PCB redesign. If your design accommodates SMB footprints, ES3DB-13-F is electrically equivalent.

Q: Why do some substitute parts have lower forward voltage (875 mV vs. 900 mV)?

A: Forward voltage variation within the specified range is normal across different manufacturers and process technologies. The MURS320 series (875 mV @ 3 A) exhibits slightly lower forward voltage than the ESH3D M6G (900 mV @ 3 A). This difference is within acceptable engineering tolerance and results in marginally lower power dissipation. Both values are acceptable for circuit design purposes.

Q: What is the impact of reverse recovery time differences (20 ns vs. 35 ns)?

A: Both the original ESH3D M6G (20 ns) and substitute parts with 35 ns reverse recovery time fall within the fast recovery classification (≤500ns). The 15 ns difference is negligible for most switching power supply applications. Shorter recovery times reduce switching losses marginally; however, this difference does not preclude substitution in standard rectification circuits.

Q: Can I substitute the ESH3D M6G with a part rated for a lower voltage (e.g., 100 V)?

A: No. The 200 V DC reverse voltage rating is a mandatory specification. Substituting with a lower voltage-rated diode creates risk of reverse breakdown and component failure. Always select a substitute with equal or higher voltage rating.

Q: Are there packaging format options for the ESH3D M6G substitute?

A: Yes. Most recommended substitutes are available in Tape & Reel (TR) or Cut Tape (CT) packaging formats. Verify packaging format compatibility with your procurement and assembly processes. The original ESH3D M6G does not specify packaging format in the provided data; confirm your requirement before ordering.

Q: What is the operating temperature range consideration for substitute selection?

A: The ESH3D M6G operates from -55°C to 175°C. Most recommended substitutes operate within -50°C to 175°C or -65°C to 175°C ranges. If your application requires the full -55°C lower temperature limit, select ES3D-13-F, MURS320-13-F, or MURS320 variants (Vishay), which specify -55°C or lower minimum operating temperature. ES3D (Diotec) specifies -50°C minimum, which may be acceptable depending on application requirements.

Q: Is the ESH3D M6G still available for purchase?

A: The ESH3D M6G is listed as discontinued at DiGi Electronics. Inventory may exist through alternative distributors (1,058 pcs noted as in stock), but long-term availability is not assured. Transition to an active substitute part is recommended for new designs and ongoing production requirements.

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