SS320HM6G Equivalent & Substitute Parts

Part Overview

The SS320HM6G 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 part is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity. The device features fast recovery characteristics with reverse recovery time ≤ 500 ns and is qualified to AEC-Q101 automotive standards with ROHS3 compliance.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 3 A	mV
Speed Classification	Fast Recovery ≤ 500 ns	ns
Current - Reverse Leakage @ Vr	100 µA @ 200 V	µA
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55°C to 150°C	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SS320HM6G is determined by strict electrical and mechanical parameter matching within the following criteria:

Primary Substitution Parameters:

Voltage - DC Reverse (Vr) (Max): 200 V (exact match required)
Current - Average Rectified (Io): 3 A (exact match required)
Package / Case: DO-214AB, SMC (exact match required)
Mounting Type: Surface Mount (exact match required)

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: 850 mV to 1.0 V @ 3 A (acceptable range for general-purpose rectification)
Speed Classification: Fast Recovery ≤ 500 ns (acceptable for fast recovery applications)
Operating Temperature - Junction: Minimum -50°C, Maximum 150°C or higher (acceptable if meeting or exceeding original range)
Current - Reverse Leakage @ Vr: 5 µA to 100 µA @ 200 V (acceptable within specified limits)

Substitute parts meeting all primary parameters and falling within secondary parameter ranges are classified as direct electrical equivalents. Parts with identical primary parameters but differing secondary characteristics are classified as functional alternatives with noted performance variations.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Speed [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Status
SS320HM6G	Taiwan Semiconductor	200	3	850 @ 3A	≤ 500	100 @ 200V	DO-214AB	-55 to 150	Discontinued
SS320H	Taiwan Semiconductor	200	3	950 @ 3A	≤ 500	100 @ 200V	DO-214AB	-55 to 150	Active
CFRC303-G	Comchip Technology	200	3	1300 @ 3A	≤ 500	5 @ 200V	DO-214AB	-55 to 150	Active
CSFC303-G	Comchip Technology	200	3	950 @ 3A	≤ 500	5 @ 200V	DO-214AB	-55 to 150	Active
CURC303-G	Comchip Technology	200	3	1000 @ 3A	≤ 500	5 @ 200V	DO-214AB	-55 to 150	Active
ER3D-TP	Micro Commercial Co	200	3	950 @ 3A	≤ 500	5 @ 200V	DO-214AB	-50 to 175	Active
ES3D	Diotec Semiconductor	200	3	900 @ 3A	≤ 500	5 @ 200V	DO-214AB	-50 to 150	Active
ES3D-13-F	Diodes Incorporated	200	3	900 @ 3A	≤ 500	10 @ 200V	DO-214AB	-55 to 150	Active
MURS320-13-F	Diodes Incorporated	200	3	875 @ 3A	≤ 500	5 @ 200V	DO-214AB	-65 to 175	Active

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitutes):

The following parts satisfy all primary substitution parameters and maintain electrical characteristics within acceptable operating ranges:

SS320H (Taiwan Semiconductor): Active product status from original manufacturer. Identical voltage and current ratings with forward voltage 100 mV higher than original. Maintains automotive grade and AEC-Q101 qualification. Recommended for direct replacement in existing designs.
MURS320-13-F (Diodes Incorporated): Active product with extended operating temperature range (-65°C to 175°C). Forward voltage 25 mV lower than original specification. ROHS3 compliant with AEC-Q101 qualification. Suitable for applications requiring enhanced temperature performance.
ES3D-13-F (Diodes Incorporated): Active product with forward voltage 50 mV lower than original. Operating temperature range matches original specification. ROHS3 compliant. High inventory availability (45,182 pcs). Suitable for general-purpose rectification applications.

Functional Alternatives (Secondary Substitutes):

The following parts meet all primary parameters but exhibit variations in secondary characteristics:

CSFC303-G (Comchip Technology): Forward voltage 100 mV higher than original. Reverse leakage current significantly lower (5 µA vs. 100 µA). Fast recovery characteristics maintained. Suitable where lower leakage current is beneficial.
CURC303-G (Comchip Technology): Forward voltage 150 mV higher than original. Reverse leakage current 5 µA. Specified reverse recovery time 50 ns. Suitable for ultrafast switching applications.
ER3D-TP (Micro Commercial Co): Forward voltage 100 mV higher than original. Extended operating temperature range (-50°C to 175°C). Reverse leakage current 5 µA. High inventory availability (16,840 pcs).
ES3D (Diotec Semiconductor): Forward voltage 50 mV lower than original. Reverse leakage current 5 µA. Specified reverse recovery time 20 ns. Highest inventory availability (131,200 pcs).

Not Recommended for Direct Substitution:

CFRC303-G (Comchip Technology): Forward voltage 450 mV higher than original specification, exceeding acceptable operating range for equivalent performance.
CGRC503-G (Comchip Technology): Current rating 5 A exceeds original 3 A specification; not a direct equivalent.
ES3DB-13-F (Diodes Incorporated): Package variant DO-214AA (SMB) differs from original DO-214AB (SMC) specification; mechanical incompatibility with existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can SS320H be used as a direct replacement for SS320HM6G?

A: Yes. SS320H meets all primary substitution parameters: 200 V reverse voltage, 3 A average rectified current, and DO-214AB SMC package. Forward voltage is 100 mV higher (950 mV vs. 850 mV at 3 A), which remains within acceptable operating range for general-purpose rectification. Both parts maintain automotive grade and AEC-Q101 qualification.

Q: What is the difference between fast recovery and standard recovery diodes in this product category?

A: Fast recovery diodes exhibit reverse recovery time ≤ 500 ns at currents > 200 mA. Standard recovery diodes exceed 500 ns. The SS320HM6G specifies fast recovery characteristics. Substitute parts must maintain this speed classification to preserve switching performance in high-frequency applications.

Q: Why is forward voltage (Vf) important when selecting a substitute?

A: Forward voltage determines power dissipation and voltage drop across the diode during conduction. The SS320HM6G specifies 850 mV maximum at 3 A. Substitutes with significantly higher forward voltage (such as CFRC303-G at 1300 mV) increase heat generation and may affect circuit performance. Acceptable substitutes maintain forward voltage within 50-150 mV of the original specification.

Q: Can ES3DB-13-F replace SS320HM6G?

A: No. Although ES3DB-13-F meets electrical specifications (200 V, 3 A, fast recovery), the package differs: DO-214AA (SMB) versus original DO-214AB (SMC). These packages have different physical dimensions and PCB footprints, preventing direct mechanical substitution without PCB redesign.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is the automotive electronics council qualification standard for discrete semiconductors. It certifies that the component meets reliability and performance requirements for automotive applications, including temperature cycling, thermal shock, and electrical stress testing. Substitutes with AEC-Q101 qualification maintain automotive-grade reliability.

Q: Is reverse leakage current (Ir) critical for substitution?

A: Reverse leakage current affects standoff voltage performance and power consumption in reverse bias conditions. The SS320HM6G specifies 100 µA at 200 V. Substitutes with lower leakage (5-10 µA) provide improved performance without compromising compatibility. Higher leakage values are not acceptable.

Q: Why do some substitutes have extended temperature ranges?

A: Extended operating temperature ranges (such as MURS320-13-F at -65°C to 175°C versus original -55°C to 150°C) indicate enhanced thermal performance and reliability margins. These parts are suitable for applications requiring operation beyond the original specification limits, though they are fully compatible with designs using the original temperature range.

Q: What is the significance of reverse recovery time (trr)?

A: Reverse recovery time is the interval required for a forward-biased diode to cease conduction after reverse bias is applied. Shorter recovery times (20-50 ns) reduce switching losses and electromagnetic interference in high-frequency circuits. The SS320HM6G does not specify trr; substitutes with specified trr values ≤ 50 ns provide superior switching performance.

Q: Can I use CGRC503-G (5 A rated) instead of SS320HM6G (3 A rated)?

A: No. Although CGRC503-G meets voltage and package requirements, the 5 A current rating exceeds the original 3 A specification. This is not a direct equivalent. Using an over-rated component does not provide functional equivalence and may mask circuit design issues.

Q: What does ROHS3 compliance indicate?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) compliance certifies that the component contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers above specified thresholds. All listed substitutes maintain ROHS3 compliance, ensuring environmental and regulatory compatibility.

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