SMB8J36C-E3/5B Equivalent & Substitute Parts

Part Overview

The SMB8J36C-E3/5B is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This bidirectional Zener diode operates in the DO-214AA (SMB) surface mount package and is designed for general-purpose overvoltage protection applications. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	36V
Voltage - Breakdown (Min)	40V
Voltage - Clamping (Max) @ Ipp	64.3V
Current - Peak Pulse (10/1000µs)	12.4A
Power - Peak Pulse	800W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SMB8J36C-E3/5B is determined by the following critical parameters:

Voltage - Reverse Standoff: 36V (all substitutes must match)
Voltage - Breakdown (Min): 40V (all substitutes must match)
Package / Case: DO-214AA, SMB (all substitutes must match)
Mounting Type: Surface Mount (all substitutes must match)
Bidirectional Channels: 1 (all substitutes must match)
Type: Zener (all substitutes must match)

Substitute parts are grouped into two categories based on electrical performance characteristics:

Category A - Direct Electrical Equivalents: Parts with clamping voltage and peak pulse current specifications within the operational range of the original part. These include SMB8J36CA-E3/5B, 1SMB36CA TR13 PBFREE, SMBJ36CA (MDD), SMBJ36CA-HR, SMBJ36CA-HRA, SMBJ36CA-TP, and SMBJ36CA-TR.

Category B - Higher Performance Alternative: SM6T42CAY (STMicroelectronics) with elevated clamping voltage (76V) and peak pulse current (52A at 8/20µs), suitable for applications requiring enhanced transient suppression capability.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Operating Temperature	Product Status	Package
SMB8J36C-E3/5B	Vishay	36V	40V	64.3V	12.4A	800W	-55°C ~ 150°C	Obsolete	DO-214AA (SMB)
SMB8J36CA-E3/5B	Vishay	36V	40V	58.1V	13.8A	800W	-55°C ~ 150°C	Active	DO-214AA (SMB)
1SMB36CA TR13 PBFREE	Central Semiconductor Corp	36V	40V	58.1V	10.3A	600W	-65°C ~ 150°C	Active	DO-214AA (SMB)
SM6T42CAY	STMicroelectronics	36V	40V	76V	52A (8/20µs)	600W	-55°C ~ 150°C	Active	DO-214AA (SMB)
SMBJ36CA	MDD	36V	40V	58.1V	10.4A	600W	-50°C ~ 150°C	Active	DO-214AA (SMB)
SMBJ36CA-HR	Littelfuse Inc.	36V	40V	58.1V	10.4A	600W	-65°C ~ 150°C	Active	DO-214AA (SMB)
SMBJ36CA-HRA	Littelfuse Inc.	36V	40V	58.1V	10.4A	600W	-65°C ~ 150°C	Active	DO-214AA (SMB)
SMBJ36CA-TP	Micro Commercial Co	36V	40V	58.1V	10.3A	600W	-55°C ~ 175°C	Active	DO-214AA (SMB)
SMBJ36CA-TR	STMicroelectronics	36V	40V	58.1V	10.3A	600W	-55°C ~ 150°C	Active	DO-214AA (SMB)

Engineering Selection Recommendations

Primary Substitutes (Category A): SMB8J36CA-E3/5B, SMBJ36CA-TR, SMBJ36CA-HR, and SMBJ36CA-HRA are direct functional equivalents with active product status. All maintain the 36V reverse standoff voltage and 40V minimum breakdown voltage. These parts are ROHS3 compliant and carry MSL 1 rating. Selection among these should be based on packaging format (tape & reel vs. bulk) and temperature range requirements.

Extended Temperature Range Option: SMBJ36CA-HR, SMBJ36CA-HRA, and SMBJ36CA-TP offer extended operating temperature ranges (-65°C to 150°C or -55°C to 175°C) compared to the original part (-55°C to 150°C), providing additional thermal margin for demanding applications.

Higher Performance Alternative: SM6T42CAY (STMicroelectronics) is suitable only for applications where elevated clamping voltage (76V) and significantly higher peak pulse current (52A) are acceptable. This part carries AEC-Q101 automotive qualification and is not a direct replacement but rather an enhanced protection option.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can SMB8J36CA-E3/5B directly replace SMB8J36C-E3/5B?

A: Yes. Both parts share identical reverse standoff voltage (36V), breakdown voltage (40V), and package specifications (DO-214AA SMB). The SMB8J36CA-E3/5B is the active production equivalent with lower clamping voltage (58.1V vs. 64.3V) and higher peak pulse current (13.8A vs. 12.4A), making it functionally compatible for the same circuit applications.

Q: What is the difference between SMBJ36CA variants from different manufacturers?

A: All SMBJ36CA variants (MDD, Littelfuse, STMicroelectronics, Micro Commercial Co) maintain identical electrical specifications: 36V reverse standoff, 40V breakdown, and 58.1V clamping voltage. Differences exist in operating temperature ranges, packaging formats (tape & reel vs. bulk), and product series designations. Selection should be based on procurement availability and specific temperature requirements.

Q: Is SM6T42CAY a direct substitute?

A: No. While SM6T42CAY matches the 36V reverse standoff and 40V breakdown voltage requirements, it features significantly higher clamping voltage (76V) and peak pulse current (52A). This part is suitable only for applications where enhanced transient suppression is required and higher clamping voltage is acceptable.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original SMB8J36C-E3/5B.

Q: What packaging options are available for substitutes?

A: Substitute parts are available in tape & reel (TR) and bulk packaging formats. SMBJ36CA-TR, SMBJ36CA-HR, SMBJ36CA-HRA, SMBJ36CA-TP, and 1SMB36CA TR13 PBFREE are supplied in tape & reel format. SMBJ36CA (MDD) is available in bulk packaging. Package selection depends on assembly process requirements and procurement volume.

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