3KASMC30AHM3_A/H Equivalent & Substitute Parts

Part Overview

The 3KASMC30AHM3_A/H is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AB (SMC) package. This component is rated for 30V reverse standoff voltage with a 48.4V maximum clamping voltage and 62A peak pulse current capability. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	3KASMC30AHM3_A/H
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	30V
Voltage - Breakdown (Min)	33.3V
Voltage - Clamping (Max) @ Ipp	48.4V
Current - Peak Pulse (10/1000µs)	62A
Power - Peak Pulse	3000W (3kW)
Mounting Type	Surface Mount
Package / Case	DO-214AB, SMC
Operating Temperature	-65°C ~ 185°C (TJ)
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 3KASMC30AHM3_A/H are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 30V
Voltage - Breakdown (Min): 33.3V
Voltage - Clamping (Max) @ Ipp: 48.4V
Current - Peak Pulse (10/1000µs): 62A
Power - Peak Pulse: 3000W (3kW)
Type: Zener, Unidirectional
Mounting Type: Surface Mount
Package / Case: DO-214AB, SMC

All substitute parts listed maintain identical electrical specifications for voltage suppression and current handling. Package compatibility is maintained across all substitutes in the DO-214AB (SMC) form factor, ensuring direct PCB footprint compatibility. Operating temperature ranges vary among manufacturers but remain within acceptable industrial and automotive ranges. All substitutes maintain RoHS3 compliance and MSL 1 rating.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Grade	Qualification	Package / Case	RoHS Status
3KASMC30AHM3_A/H	Vishay General Semiconductor - Diodes Division	Obsolete	30V	48.4V	62A	3000W	-65°C ~ 185°C	Automotive	AEC-Q101	DO-214AB, SMC	ROHS3 Compliant
3KASMC30AHM3_B/H	Vishay General Semiconductor - Diodes Division	Active	30V	48.4V	62A	3000W	-65°C ~ 185°C	Automotive	AEC-Q101	DO-214AB, SMC	ROHS3 Compliant
3.0SMCJ30A-13	Diodes Incorporated	Active	30V	48.4V	62A	3000W	-55°C ~ 175°C	—	—	DO-214AB, SMC	ROHS3 Compliant
3SMC30A TR13 PBFREE	Central Semiconductor Corp	Active	30V	48.4V	62A	3000W	-65°C ~ 150°C	—	—	DO-214AB, SMC	ROHS3 Compliant
SM30T35AY	STMicroelectronics	Active	30V	48.4V	62A	3000W	-55°C ~ 175°C	Automotive	AEC-Q101	DO-214AB, SMC	ROHS3 Compliant
SMC30J30A	STMicroelectronics	Active	30V	48.4V	62A	3000W	-55°C ~ 175°C	—	—	DO-214AB, SMC	ROHS3 Compliant
SMDJ30A-HR	Littelfuse Inc.	Active	30V	48.4V	62A	3000W	-65°C ~ 150°C	—	—	DO-214AB, SMC	ROHS3 Compliant
SMDJ30A-HRA	Littelfuse Inc.	Active	30V	48.4V	62A	3000W	-65°C ~ 150°C	—	—	DO-214AB, SMC	ROHS3 Compliant
SMDJ30A-HRAT7	Littelfuse Inc.	Active	30V	48.4V	62A	3000W	-65°C ~ 150°C	—	—	DO-214AB, SMC	ROHS3 Compliant
SMLJ30A-TP	Micro Commercial Co	Active	30V	48.4V	62A	3000W	-55°C ~ 175°C	—	—	DO-214AB, SMC	ROHS3 Compliant
SMLJ30AE3/TR13	Microchip Technology	Active	30V	48.4V	62A	300W	-55°C ~ 150°C	—	—	DO-214AB, SMC	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation for Automotive Applications: The 3KASMC30AHM3_B/H is the direct successor to the obsolete 3KASMC30AHM3_A/H, manufactured by the same supplier (Vishay General Semiconductor - Diodes Division). This part maintains identical electrical specifications, automotive grade designation, and AEC-Q101 qualification. The only difference is product status (Active vs. Obsolete) and packaging format (Tape & Reel). This is the preferred substitute for designs requiring automotive-grade compliance.

Alternative for Automotive Applications: The SM30T35AY from STMicroelectronics provides automotive-grade qualification with AEC-Q101 certification and maintains all critical electrical parameters. Operating temperature range is -55°C ~ 175°C, which is narrower than the original part but suitable for most automotive environments.

General Purpose Substitutes: For non-automotive applications, the following parts provide full electrical equivalence with active product status:

3.0SMCJ30A-13 (Diodes Incorporated)
SMC30J30A (STMicroelectronics)
SMLJ30A-TP (Micro Commercial Co)
SMDJ30A-HR, SMDJ30A-HRA, SMDJ30A-HRAT7 (Littelfuse Inc.)

Note on SMLJ30AE3/TR13: This Microchip Technology part maintains electrical compatibility for voltage and current specifications but specifies 300W peak pulse power versus the 3000W rating of the original part. This part is suitable only for applications where peak pulse power requirements do not exceed 300W.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for the 3KASMC30AHM3_A/H?

A: All listed substitute parts maintain identical electrical specifications (30V reverse standoff, 48.4V clamping voltage, 62A peak pulse current) and the same DO-214AB (SMC) package footprint. However, for automotive applications, the 3KASMC30AHM3_B/H or SM30T35AY are recommended due to AEC-Q101 qualification. For general purpose applications, any substitute with active product status is electrically compatible.

Q: What is the difference between the 3KASMC30AHM3_A/H and 3KASMC30AHM3_B/H?

A: Both parts are manufactured by Vishay and share identical electrical specifications and automotive-grade AEC-Q101 qualification. The primary difference is product status: the _A/H variant is obsolete, while the _B/H variant is active. The _B/H is packaged in Tape & Reel format, whereas the _A/H packaging is not specified. The _B/H is the direct replacement.

Q: Are all substitute parts RoHS compliant?

A: Yes, all listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part specifications.

Q: What is the significance of the operating temperature range differences?

A: The original 3KASMC30AHM3_A/H operates from -65°C to 185°C (TJ). Some substitutes have narrower ranges (e.g., -55°C to 175°C). For applications operating at the temperature extremes of the original specification, verify that the selected substitute's operating range is adequate. Automotive-grade parts (3KASMC30AHM3_B/H and SM30T35AY) are recommended for temperature-critical designs.

Q: Why does SMLJ30AE3/TR13 have a different power rating?

A: The SMLJ30AE3/TR13 from Microchip Technology specifies 300W peak pulse power compared to 3000W for other substitutes. This part is suitable only for applications where peak pulse power does not exceed 300W. Verify application requirements before selecting this part.

Q: Are there packaging format differences I should consider?

A: All substitute parts use the DO-214AB (SMC) surface mount package, ensuring PCB footprint compatibility. Packaging formats vary (Cut Tape, Tape & Reel, Digi-Reel) but do not affect electrical performance or board-level compatibility. Select based on procurement and assembly requirements.

Q: Which substitute should I choose for a new automotive design?

A: For new automotive designs, select either the 3KASMC30AHM3_B/H (Vishay) or SM30T35AY (STMicroelectronics). Both carry automotive-grade designation and AEC-Q101 qualification, ensuring compliance with automotive reliability standards.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message