SMBJ30-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ30-E3/5B is a 30V Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division in the DO-214AA (SMB) surface mount package. This unidirectional Zener diode is designed for general-purpose transient voltage suppression applications with a peak pulse power rating of 600W and peak pulse current of 11.2A at a clamping voltage of 53.5V.

The SMBJ30-E3/5B is currently listed as obsolete. Equivalent and substitute parts are available from multiple manufacturers with active product status, offering comparable electrical performance and identical mechanical compatibility for direct board-level replacement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	30V
Voltage - Breakdown (Min)	33.3V
Voltage - Clamping (Max) @ Ipp	53.5V
Current - Peak Pulse (10/1000µs)	11.2A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Type	Zener
Unidirectional Channels	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SMBJ30-E3/5B are grouped based on electrical and mechanical compatibility within the following criteria:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 30V (exact match required)
Voltage - Breakdown (Min): 33.3V (exact match required)
Package / Case: DO-214AA, SMB (exact match required)
Mounting Type: Surface Mount (exact match required)
Type: Zener, Unidirectional (exact match required)
Unidirectional Channels: 1 (exact match required)

Secondary Electrical Parameters (allowable variation):

Voltage - Clamping (Max) @ Ipp: 48.4V to 53.5V
Current - Peak Pulse (10/1000µs): 10A to 12.4A
Power - Peak Pulse: 500W to 600W
Operating Temperature Range: -65°C to -55°C minimum; 150°C maximum

Compliance Requirements:

RoHS3 Compliant or RoHS Compliant
MSL 1 (Unlimited)
REACH Unaffected

Substitute parts meeting these criteria are functionally equivalent for circuit protection applications and are pin-compatible for direct PCB replacement.

Parameter Comparison

Part Number	Manufacturer	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Product Status	RoHS Status
SMBJ30-E3/5B	Vishay General Semiconductor - Diodes Division	53.5V	11.2A	600W	-55°C ~ 150°C	Obsolete	ROHS3 Compliant
SMBJ30A-E3/5B	Vishay General Semiconductor - Diodes Division	48.4V	12.4A	600W	-55°C ~ 150°C	Active	ROHS3 Compliant
SMBJ30E3/TR13	Microchip Technology	53.5V	11.2A	600W	-65°C ~ 150°C	Active	ROHS3 Compliant
1SMB30A TR13	Central Semiconductor Corp	48.4V	12.4A	600W	-65°C ~ 150°C	Active	ROHS3 Compliant
SACB30	Littelfuse Inc.	48.6V	10A	500W	-55°C ~ 150°C	Active	ROHS3 Compliant
SMBJ30A	MDD	48.4V	12.4A	600W	-55°C ~ 150°C	Active	RoHS Compliant
SMBJ30A-13-F	Diodes Incorporated	48.4V	12.4A	600W	-55°C ~ 150°C	Active	ROHS3 Compliant
SMBJ30A-HR	Littelfuse Inc.	48.4V	12.4A	600W	-65°C ~ 150°C	Active	ROHS3 Compliant
SMBJ30A-HRA	Littelfuse Inc.	48.4V	12.4A	600W	-65°C ~ 150°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Electrical Match (Identical Clamping Voltage): SMBJ30E3/TR13 from Microchip Technology provides an exact electrical match to the SMBJ30-E3/5B with 53.5V clamping voltage and 11.2A peak pulse current. This part is active and ROHS3 compliant with extended operating temperature range (-65°C to 150°C).

Primary Substitute (Lower Clamping Voltage): SMBJ30A-E3/5B from Vishay General Semiconductor - Diodes Division is the direct active-status successor with 48.4V clamping voltage and 12.4A peak pulse current. This part maintains identical packaging and Vishay manufacturing continuity with ROHS3 compliance.

Alternative Sources (Active Status): Multiple manufacturers offer SMBJ30A variants with 48.4V clamping voltage and 12.4A peak pulse current, all ROHS3 compliant and suitable for general-purpose transient suppression. These include Diodes Incorporated (SMBJ30A-13-F), Littelfuse Inc. (SMBJ30A-HR, SMBJ30A-HRA), and MDD (SMBJ30A).

Lower Power Alternative: SACB30 from Littelfuse Inc. offers 48.6V clamping voltage with 10A peak pulse current and 500W peak pulse power. This part is suitable for applications with reduced transient energy requirements while maintaining the 30V standoff voltage specification.

All recommended substitutes are ROHS3 compliant, MSL 1 rated, and REACH unaffected, meeting standard industrial compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can SMBJ30A-E3/5B directly replace SMBJ30-E3/5B on the PCB? A: Yes. Both parts share identical DO-214AA (SMB) package geometry, pin configuration, and surface mount footprint. The SMBJ30A-E3/5B is the active-status equivalent with lower clamping voltage (48.4V vs 53.5V) and higher peak pulse current (12.4A vs 11.2A), both within acceptable substitution parameters for the 30V standoff voltage class.

Q: What is the difference between SMBJ30E3/TR13 and SMBJ30A-E3/5B? A: SMBJ30E3/TR13 (Microchip) maintains the original 53.5V clamping voltage and 11.2A peak pulse current specification. SMBJ30A-E3/5B (Vishay) reduces clamping voltage to 48.4V while increasing peak pulse current to 12.4A. Both are electrically valid substitutes with identical package compatibility.

Q: Are all substitute parts ROHS3 compliant? A: All recommended substitutes are either ROHS3 compliant or RoHS compliant. SMBJ30A from MDD carries RoHS compliance; all others are ROHS3 compliant. All parts are REACH unaffected and MSL 1 rated.

Q: Does operating temperature range affect substitution compatibility? A: Operating temperature range does not prevent substitution. The original SMBJ30-E3/5B operates -55°C to 150°C. Substitutes with extended range (-65°C to 150°C) such as SMBJ30E3/TR13, 1SMB30A TR13, SMBJ30A-HR, and SMBJ30A-HRA provide additional thermal margin without affecting circuit compatibility.

Q: Can SACB30 replace SMBJ30-E3/5B in all applications? A: SACB30 is electrically compatible with identical 30V standoff voltage and 33.3V breakdown voltage. However, it provides lower peak pulse power (500W vs 600W) and lower peak pulse current (10A vs 11.2A). Use SACB30 only in applications where transient energy levels do not exceed 500W peak pulse power.

Q: What packaging formats are available for substitutes? A: All substitute parts are available in DO-214AA (SMB) surface mount package. Packaging options include bulk, tape & reel (TR), and tube formats depending on manufacturer and part number variant. Verify packaging specification with supplier for procurement requirements.

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