SMBJ11A-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ11A-E3/5B is a unidirectional 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 protection applications. The part is Active status and ROHS3 compliant, making it suitable for current production designs. Equivalent and substitute parts are identified when electrical parameters and mechanical specifications align within acceptable tolerances for the application.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	11	V
Voltage - Breakdown (Min)	12.2	V
Voltage - Clamping (Max) @ Ipp	18.2	V
Current - Peak Pulse (10/1000µs)	33	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
Type	Zener	-
Unidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ11A-E3/5B is determined by the following critical parameters:

Electrical Parameters (Must Match):

Voltage - Reverse Standoff (Typ): 11V
Voltage - Breakdown (Min): 12.2V
Voltage - Clamping (Max) @ Ipp: 18.2V
Current - Peak Pulse (10/1000µs): 33A (±tolerance acceptable)
Power - Peak Pulse: 600W
Type: Zener
Unidirectional Channels: 1

Mechanical Parameters (Must Match):

Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount

Compliance Parameters (Must Match):

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts SMBJ11A (Meritek), SMBJ11A-13-F (Diodes Incorporated), and SMBJ11A-TP (Micro Commercial Co) meet all critical electrical and mechanical parameters. The SMBJ10A-TR (STMicroelectronics) is listed as a manufacturer-recommended alternative but operates at different voltage specifications (10V standoff, 17V clamping) and represents a lower-voltage variant for applications with reduced transient voltage requirements.

Parameter Comparison

Parameter	SMBJ11A-E3/5B (Vishay)	SMBJ11A (Meritek)	SMBJ11A-13-F (Diodes Inc)	SMBJ11A-TP (MCC)	SMBJ10A-TR (STMicro)
Voltage - Reverse Standoff (Typ)	11V	11V	11V	11V	10V
Voltage - Breakdown (Min)	12.2V	12.2V	12.2V	12.2V	11.1V
Voltage - Clamping (Max) @ Ipp	18.2V	18.2V	18.2V	18.2V	17V
Current - Peak Pulse (10/1000µs)	33A	32.97A	33A	33A	37A
Power - Peak Pulse	600W	600W	600W	600W	600W
Operating Temperature Range	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 175°C	-55 to 150°C
Package / Case	DO-214AA, SMB	DO-214AA (SMB)	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical Specifications):

SMBJ11A (Meritek), SMBJ11A-13-F (Diodes Incorporated), and SMBJ11A-TP (Micro Commercial Co) are direct functional equivalents to the SMBJ11A-E3/5B. All three parts maintain identical voltage specifications (11V standoff, 12.2V breakdown, 18.2V clamping), equivalent peak pulse current (32.97A to 33A), and identical power dissipation (600W). All are ROHS3 compliant with MSL 1 rating. SMBJ11A-TP offers an extended operating temperature range to 175°C compared to 150°C for the primary part, providing additional thermal margin in high-temperature applications.

Manufacturer-Recommended Alternative (Lower Voltage Variant):

SMBJ10A-TR (STMicroelectronics) is designated as a manufacturer-recommended substitute but operates at reduced voltage specifications (10V standoff, 11.1V breakdown, 17V clamping). This part is suitable only for applications where the lower voltage threshold is acceptable. The higher peak pulse current rating (37A) does not compensate for the voltage reduction. SMBJ10A-TR is ROHS3 compliant with MSL 1 rating and identical package specifications.

All substitute parts maintain Active product status and full regulatory compliance (ROHS3, REACH Unaffected, EAR99 ECCN classification).

Frequently Asked Questions (FAQ)

Q: Can SMBJ11A (Meritek) be used as a direct replacement for SMBJ11A-E3/5B?

A: Yes. SMBJ11A maintains identical electrical parameters (11V standoff, 18.2V clamping, 33A peak pulse current) and mechanical specifications (DO-214AA SMB package, surface mount). Both are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between SMBJ11A-13-F and SMBJ11A-TP?

A: Both parts are electrically identical to the primary SMBJ11A-E3/5B specification. SMBJ11A-TP offers an extended operating temperature range (-55 to 175°C) compared to SMBJ11A-13-F (-55 to 150°C). Selection depends on application thermal requirements.

Q: Is SMBJ10A-TR a suitable substitute?

A: SMBJ10A-TR is a lower-voltage variant (10V standoff, 17V clamping) designated as a manufacturer-recommended alternative. It is suitable only for applications where reduced voltage protection is acceptable. Direct substitution is not recommended for circuits designed for 11V standoff protection.

Q: Do all substitute parts use the same DO-214AA SMB package?

A: Yes. All listed parts use the DO-214AA (SMB) surface mount package with identical mechanical footprint and mounting requirements.

Q: Are there any compliance differences between the substitute parts?

A: No. All substitute parts are ROHS3 compliant, REACH Unaffected, and carry EAR99 ECCN classification. All have MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the peak pulse current tolerance across substitute parts?

A: SMBJ11A (Meritek) is rated at 32.97A, while SMBJ11A-13-F and SMBJ11A-TP are rated at 33A. This 0.03A variance is within acceptable engineering tolerance for general-purpose TVS applications.

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