SS34 M6 Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS34 M6 is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 40 V DC reverse voltage and 3 A average rectified current in a DO-214AB surface mount package. This component is classified as discontinued at DiGi Electronics, necessitating identification of active equivalent parts for ongoing procurement and design requirements. The part operates across a junction temperature range of -55°C to 125°C and meets ROHS3 compliance standards.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500	µA @ 40 V
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 125	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SS34 M6 is determined by electrical and mechanical parameter equivalence. The critical parameters governing substitutability are:

Voltage Rating: DC reverse voltage must equal or exceed 40 V
Current Rating: Average rectified current must equal or exceed 3 A
Forward Voltage Drop: Maximum forward voltage at rated current must not exceed 500 mV @ 3 A
Recovery Speed: Fast recovery characteristic ≤ 500ns for switching applications
Reverse Leakage: Maximum reverse leakage current at rated voltage must not exceed 500 µA @ 40 V
Package Type: Surface mount DO-214AB (SMC) package required for mechanical and thermal compatibility
Temperature Range: Operating junction temperature range must encompass -55°C to 125°C
Compliance: ROHS3 compliance required for regulatory alignment

The SS34H meets all specified electrical and mechanical parameters and is classified as an active product, making it a direct parametric equivalent.

Parameter Comparison

Parameter	SS34 M6 (Main Part)	SS34H (Substitute)	Match Status
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Identical
Technology	Schottky	Schottky	Identical
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	Identical
Current - Average Rectified (Io)	3 A	3 A	Identical
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A	500 mV @ 3 A	Identical
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Identical
Current - Reverse Leakage @ Vr	500 µA @ 40 V	500 µA @ 40 V	Identical
Package / Case	DO-214AB, SMC	DO-214AB, SMC	Identical
Operating Temperature - Junction	-55°C to 125°C	-55°C to 125°C	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Identical
Product Status	Discontinued at DiGi Electronics	Active	Substitute is Active

Engineering Selection Recommendations

The SS34H is a direct parametric equivalent to the SS34 M6 and is suitable for substitution in all applications where the main part was originally specified. The SS34H maintains identical electrical characteristics across all critical parameters: reverse voltage rating, forward current capacity, forward voltage drop, switching speed, and reverse leakage current.

The primary distinction between the two parts is product status and packaging format. The SS34 M6 is discontinued, whereas the SS34H is actively manufactured and available. The SS34H is supplied in Tape & Reel (TR) packaging format and carries AEC-Q101 automotive qualification, indicating enhanced reliability screening and traceability suitable for automotive and mission-critical applications.

Both parts comply with ROHS3 regulations and maintain identical moisture sensitivity levels, thermal operating ranges, and regulatory classifications (REACH Unaffected, ECCN EAR99, HTSUS 8541.10.0080).

Frequently Asked Questions (FAQ)

Q: Can the SS34H be used as a direct replacement for the SS34 M6?

A: Yes. The SS34H is electrically and mechanically equivalent to the SS34 M6. All critical parameters—reverse voltage, forward current, forward voltage drop, switching speed, reverse leakage, package type, and operating temperature range—are identical. The SS34H is the recommended substitute due to its active product status.

Q: What is the difference between SS34 M6 and SS34H packaging?

A: The SS34 M6 is supplied in standard packaging format, while the SS34H is supplied in Tape & Reel (TR) format. Both use the DO-214AB (SMC) surface mount package. Tape & Reel packaging is standard for high-volume automated assembly operations.

Q: Does the SS34H have additional qualifications?

A: Yes. The SS34H carries AEC-Q101 automotive qualification, indicating compliance with automotive reliability and quality standards. This qualification is not listed for the SS34 M6. The SS34H is suitable for both general industrial and automotive applications.

Q: Are there any thermal or electrical performance differences between these parts?

A: No. Both parts operate across the identical junction temperature range (-55°C to 125°C) and exhibit identical electrical performance specifications. Forward voltage drop, reverse leakage current, and switching speed are equivalent.

Q: Is the SS34H compliant with the same regulatory standards as the SS34 M6?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and carry identical ECCN and HTSUS classifications. Moisture sensitivity levels are identical (MSL 1, Unlimited).

Q: Why is the SS34 M6 discontinued?

A: The SS34 M6 is discontinued at DiGi Electronics. The SS34H remains in active production and is the recommended source for ongoing procurement.

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