SMB10J30A-M3/52 Equivalent & Substitute Parts

Part Overview

The SMB10J30A-M3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 30V reverse standoff category and is designed for general-purpose transient voltage protection applications. The part is Active status and ROHS3 compliant, making it suitable for modern electronic designs requiring ESD and surge protection.

Equivalent and substitute parts are identified based on matching electrical characteristics: 30V reverse standoff voltage, 33.3V minimum breakdown voltage, 48.4V maximum clamping voltage, and compatible surface mount packaging (DO-214AA/SMB). Alternative sources and manufacturers provide functionally equivalent protection performance within the specified parameter ranges.

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)	20.7	A
Power - Peak Pulse	1000	W
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	DO-214AA, SMB	-
Type	Zener	-
Unidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitute parts for the SMB10J30A-M3/52 are grouped based on strict electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 30V (exact match required)
Voltage - Breakdown (Min): 33.3V (exact match required)
Voltage - Clamping (Max) @ Ipp: 48.4V (exact match or within 0.2V tolerance)
Package / Case: DO-214AA or SMB (mechanical compatibility)
Mounting Type: Surface Mount (required)
Type: Zener, Unidirectional (functional requirement)

Secondary Consideration:

Current - Peak Pulse ratings may vary (10A to 20.7A) based on application requirements
Power - Peak Pulse ratings scale proportionally with current ratings
Operating temperature range may extend beyond the base specification

Parts meeting all primary criteria are classified as direct electrical equivalents. Variations in peak pulse current and power ratings indicate different thermal handling capabilities but maintain voltage protection performance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Package	RoHS Status
SMB10J30A-M3/52	Vishay	30	33.3	48.4	20.7	1000	-55 to 150	DO-214AA, SMB	ROHS3
SMB10J30A-E3/52	Vishay	30	33.3	48.4	20.7	1000	-55 to 150	DO-214AA, SMB	ROHS3
SACB30	Littelfuse Inc.	30	33.3	48.6	10	500	-55 to 150	DO-214AA, SMB	ROHS3
SMBJ30A	MDD	30	33.3	48.4	12.4	600	-55 to 150	DO-214AA, SMB	RoHS
SMBJ30A-13-F	Diodes Incorporated	30	33.3	48.4	12.4	600	-55 to 150	DO-214AA, SMB	ROHS3
SMBJ30A-TP	Micro Commercial Co	30	33.3	48.4	12.4	600	-55 to 175	DO-214AA, SMB	ROHS3
SMBJ30A-TR	STMicroelectronics	30	33.3	48.4	13	600	-55 to 150	DO-214AA, SMB	ROHS3
SZ1SMB30AT3G	Littelfuse Inc.	30	33.3	48.4	12.4	600	-65 to 150	DO-214AA, SMB	ROHS3

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical Performance): SMB10J30A-E3/52 (Vishay) is a direct equivalent with identical voltage ratings, peak pulse current (20.7A), and power dissipation (1000W). Both parts share ROHS3 compliance and Active product status. Selection between these Vishay variants depends on packaging format availability (TR designation indicates Tape & Reel).

Functional Equivalents (Voltage Protection Maintained): SMBJ30A-13-F (Diodes Incorporated), SMBJ30A-TR (STMicroelectronics), SMBJ30A (MDD), SMBJ30A-TP (Micro Commercial Co), and SZ1SMB30AT3G (Littelfuse) maintain identical voltage protection characteristics (30V standoff, 33.3V breakdown, 48.4V clamping). These parts differ in peak pulse current ratings (12.4A to 13A) and power dissipation (600W), indicating reduced thermal capacity compared to the base part. All maintain ROHS3 compliance and Active status. SZ1SMB30AT3G includes automotive-grade qualification (AEC-Q101) and extended temperature range (-65°C to 150°C).

Reduced Performance Equivalent: SACB30 (Littelfuse) maintains voltage protection specifications but operates at reduced peak pulse current (10A) and power dissipation (500W). This part is suitable for applications with lower transient energy requirements. ROHS3 compliance is confirmed.

All substitute parts are surface mount, DO-214AA/SMB package compatible, and maintain the unidirectional Zener diode topology required for transient voltage suppression.

Frequently Asked Questions (FAQ)

Q: Can SACB30 replace SMB10J30A-M3/52 in all applications? A: SACB30 maintains identical voltage protection (30V standoff, 33.3V breakdown, 48.4V clamping) but operates at reduced peak pulse current (10A vs. 20.7A) and power dissipation (500W vs. 1000W). Substitution is valid only if the application's transient energy does not exceed 500W peak pulse power.

Q: What is the difference between SMB10J30A-M3/52 and SMB10J30A-E3/52? A: Both parts are manufactured by Vishay with identical electrical specifications. The difference is in packaging format: M3/52 and E3/52 designations indicate different tape and reel configurations. Electrical performance and compliance are equivalent.

Q: Are all substitute parts ROHS3 compliant? A: Seven of eight substitute parts carry ROHS3 certification. SMBJ30A (MDD) carries RoHS compliance without the "3" designation. Verify specific RoHS requirement for your application before selection.

Q: Can SZ1SMB30AT3G be used in automotive applications? A: SZ1SMB30AT3G carries AEC-Q101 automotive qualification and extended temperature range (-65°C to 150°C). It is suitable for automotive-grade applications. Other substitutes are general-purpose grade unless otherwise specified.

Q: Do all substitute parts use the same DO-214AA/SMB package? A: All substitute parts use DO-214AA or SMB package designation, confirming mechanical and footprint compatibility. Verify specific supplier device package designation during procurement to ensure PCB assembly compatibility.

Q: What is the significance of peak pulse current variation among substitutes? A: Peak pulse current (10A to 20.7A) determines the maximum transient current the diode can suppress. Higher ratings indicate greater thermal capacity for handling larger transient events. Select based on actual transient energy in your circuit; lower ratings are acceptable if transient magnitude is within specification.

Q: Is operating temperature range a critical substitution parameter? A: Operating temperature range affects reliability in extreme environments. SMBJ30A-TP extends to 175°C; SZ1SMB30AT3G extends to -65°C minimum. Standard parts operate -55°C to 150°C. Select based on actual operating environment requirements.

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