SMB8J30CA-M3/52 Equivalent & Substitute Parts

Part Overview

The SMB8J30CA-M3/52 is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and is designed for general-purpose transient voltage suppression applications. The part is Active status and ROHS3 compliant, making it suitable for modern electronic circuit protection requirements. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	30	V
Voltage - Breakdown (Min)	33.3	V
Voltage - Clamping (Max) @ Ipp	48.4	V
Current - Peak Pulse (10/1000µs)	16.5	A
Power - Peak Pulse	800	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
Bidirectional Channels	1	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the SMB8J30CA-M3/52 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
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Bidirectional Channels: 1
RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

Current - Peak Pulse (10/1000µs): 12.4A to 16.5A (within application tolerance)
Power - Peak Pulse: 600W to 800W (within application tolerance)
Operating Temperature Range: -65°C to 175°C (encompasses or matches primary part range)

All identified substitute parts maintain identical voltage specifications and package configuration, ensuring direct functional equivalence in circuit protection applications.

Parameter Comparison

Part Number	Manufacturer	Voltage Standoff (V)	Voltage Breakdown Min (V)	Voltage Clamp Max (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Temp Range (°C)	Package	RoHS Status
SMB8J30CA-M3/52	Vishay	30	33.3	48.4	16.5	800	-55 to 150	DO-214AA, SMB	ROHS3
SMBJ30CA	MDD	30	33.3	48.4	12.4	600	-50 to 150	DO-214AA, SMB	ROHS3
SMBJ30CA-13-F	Diodes Incorporated	30	33.3	48.4	12.4	600	-55 to 150	DO-214AA, SMB	ROHS3
SMBJ30CA-TP	Micro Commercial Co	30	33.3	48.4	12.4	600	-55 to 175	DO-214AA, SMB	ROHS3
SMBJ30CA-TR	STMicroelectronics	30	33.3	48.4	13	600	-55 to 150	DO-214AA, SMB	ROHS3
SZ1SMB30CAT3G	Littelfuse	30	33.3	48.4	12.4	600	-65 to 150	DO-214AA, SMB	ROHS3

Engineering Selection Recommendations

All substitute parts listed maintain identical voltage specifications (30V standoff, 33.3V breakdown minimum, 48.4V clamping maximum) and package configuration (DO-214AA, SMB surface mount), ensuring direct functional equivalence for transient voltage suppression applications.

Compliance and Certification Status:

All parts are ROHS3 compliant
All parts carry Moisture Sensitivity Level 1 (Unlimited)
All parts are REACH unaffected
SZ1SMB30CAT3G carries AEC-Q101 automotive qualification

Peak Pulse Current Considerations: The main part SMB8J30CA-M3/52 specifies 16.5A peak pulse current, while substitute parts specify 12.4A to 13A. Selection should confirm that application requirements do not exceed the lower current ratings of substitute parts.

Operating Temperature Range:

SZ1SMB30CAT3G extends to -65°C minimum (lower than primary part)
SMBJ30CA-TP extends to 175°C maximum (higher than primary part)
All other parts match or fall within the primary part's -55°C to 150°C range

Packaging and Availability: Substitute parts are available in Tape & Reel (TR) and Cut Tape (CT) configurations, supporting both high-volume and component-level procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can SMBJ30CA-13-F directly replace SMB8J30CA-M3/52?

A: Yes. Both parts share identical voltage specifications (30V standoff, 33.3V breakdown, 48.4V clamp) and DO-214AA SMB package configuration. The SMBJ30CA-13-F specifies 12.4A peak pulse current versus 16.5A for the primary part. Direct substitution is valid if application peak pulse current requirements do not exceed 12.4A.

Q: What is the difference between the packaging options (Tape & Reel vs. Cut Tape)?

A: Tape & Reel (TR) packaging is used for automated assembly processes and high-volume production. Cut Tape (CT) and Digi-Reel® packaging support lower-volume procurement and component-level selection. All packaging options contain identical electrical components in the DO-214AA SMB package.

Q: Is SZ1SMB30CAT3G suitable for automotive applications?

A: SZ1SMB30CAT3G carries AEC-Q101 automotive qualification and operates across -65°C to 150°C, making it suitable for automotive-grade applications. Other substitute parts do not carry automotive qualification designations.

Q: How do peak pulse power ratings affect substitution?

A: The primary part specifies 800W peak pulse power, while substitute parts specify 600W. Substitution is valid if application transient energy does not exceed 600W. Peak pulse power is derived from voltage clamping and peak pulse current characteristics.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the primary part's environmental and regulatory status.

Q: What is the significance of Moisture Sensitivity Level 1?

A: Moisture Sensitivity Level 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. No baking or special moisture control procedures are required prior to soldering or assembly.

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