SMBJ36C-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ36C-E3/52 is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface-mount component in DO-214AA (SMB) package is designed for general-purpose transient voltage suppression applications. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within the specified electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	36	V
Voltage - Breakdown (Min)	40	V
Voltage - Clamping (Max) @ Ipp	64.3	V
Current - Peak Pulse (10/1000µs)	9.3	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Type	Zener	—
Bidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SMBJ36C-E3/52 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Voltage - Reverse Standoff (Typ): 36V
Voltage - Breakdown (Min): 40V
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Type: Zener
Bidirectional Channels: 1
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation Parameters:

Voltage - Clamping (Max) @ Ipp: 58.1V to 76V (within application tolerance)
Current - Peak Pulse (10/1000µs): 9.3A to 52A (application-dependent)
Operating Temperature Range: -65°C to 150°C (extended lower limit acceptable)
Product Status: Active (preferred over obsolete)

Substitute parts are grouped into two categories: direct electrical equivalents with identical clamping voltage (64.3V) and functional equivalents with alternative clamping voltages (58.1V or 76V) that maintain the same standoff and breakdown voltage specifications.

Parameter Comparison

Part Number	Manufacturer	Voltage Standoff (V)	Voltage Breakdown Min (V)	Voltage Clamp Max (V)	Current Peak Pulse (A)	Package	Product Status	Operating Temp (°C)
SMBJ36C-E3/52	Vishay	36	40	64.3	9.3	DO-214AA, SMB	Obsolete	-55 to 150
SMBJ36CA-E3/52	Vishay	36	40	58.1	10.3	DO-214AA, SMB	Active	-55 to 150
SMBJ36CE3/TR13	Microchip Technology	36	40	64.3	9.3	DO-214AA, SMB	Active	-65 to 150
1SMB36CA TR13 PBFREE	Central Semiconductor Corp	36	40	58.1	10.3	DO-214AA, SMB	Active	-65 to 150
SM6T42CAY	STMicroelectronics	36	40	76	52 (8/20µs)	DO-214AA, SMB	Active	-55 to 150
SMBJ36CA	MDD	36	40	58.1	10.4	DO-214AA, SMB	Active	-50 to 150
SMBJ36CA-13-F	Diodes Incorporated	36	40	58.1	10.3	DO-214AA, SMB	Active	-55 to 150
SMBJ36CA-HR	Littelfuse Inc.	36	40	58.1	10.4	DO-214AA, SMB	Active	-65 to 150
SMBJ36CA-HRA	Littelfuse Inc.	36	40	58.1	10.4	DO-214AA, SMB	Active	-65 to 150

Engineering Selection Recommendations

Direct Electrical Equivalent (Identical Clamping Voltage):

SMBJ36CE3/TR13 (Microchip Technology) is the direct electrical equivalent to SMBJ36C-E3/52, maintaining identical voltage clamping characteristics (64.3V) and peak pulse current (9.3A). This part is active and RoHS3 compliant with extended operating temperature range (-65°C to 150°C). Selection of this part eliminates any circuit performance variation due to clamping voltage differences.

Functional Equivalents (Alternative Clamping Voltages):

Parts with 58.1V clamping voltage (SMBJ36CA-E3/52, 1SMB36CA TR13 PBFREE, SMBJ36CA, SMBJ36CA-13-F, SMBJ36CA-HR, SMBJ36CA-HRA) are functionally equivalent when application circuit design permits lower clamping voltage. These parts offer higher peak pulse current capability (10.3A to 10.4A) and are all active with full RoHS3 compliance. Littelfuse SMBJ36CA-HR and SMBJ36CA-HRA variants provide extended temperature range (-65°C to 150°C).

SM6T42CAY (STMicroelectronics) represents a higher-performance alternative with 76V clamping voltage and significantly elevated peak pulse current (52A at 8/20µs pulse). This part carries AEC-Q101 automotive qualification and is suitable for applications requiring enhanced transient suppression capability.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. Selection should prioritize active parts over the obsolete SMBJ36C-E3/52 to ensure long-term supply chain availability and manufacturing consistency.

Frequently Asked Questions (FAQ)

Q: Can SMBJ36CA-E3/52 directly replace SMBJ36C-E3/52 in existing designs?

A: SMBJ36CA-E3/52 is functionally compatible but exhibits lower clamping voltage (58.1V versus 64.3V). Direct substitution is valid only if circuit design specifications permit this voltage reduction. Verify that protected components tolerate the lower clamping threshold.

Q: What is the difference between SMBJ36CE3/TR13 and SMBJ36CA-E3/52?

A: SMBJ36CE3/TR13 (Microchip) maintains identical electrical characteristics to the original SMBJ36C-E3/52 with 64.3V clamping voltage. SMBJ36CA-E3/52 (Vishay) provides lower clamping voltage (58.1V) but higher peak pulse current (10.3A). SMBJ36CE3/TR13 is the direct equivalent; SMBJ36CA-E3/52 is a functional alternative.

Q: Are all substitute parts available in the same packaging?

A: All listed substitute parts use DO-214AA (SMB) surface-mount package with identical mechanical dimensions and land pattern compatibility. Packaging variations exist only in tape & reel configurations (TR, CT, Digi-Reel®), which do not affect component functionality or PCB assembly.

Q: Why does SM6T42CAY have significantly higher peak pulse current?

A: SM6T42CAY is designed for automotive applications (AEC-Q101 qualified) with enhanced transient suppression capability. The 52A peak pulse current (8/20µs) reflects a different pulse waveform specification compared to the standard 10/1000µs pulse used for other parts. Selection of this part requires verification that application pulse characteristics match the 8/20µs specification.

Q: What is the impact of operating temperature range differences?

A: The original SMBJ36C-E3/52 operates from -55°C to 150°C. Substitute parts with extended range (-65°C to 150°C) provide additional margin for low-temperature applications. Parts with reduced lower limit (-50°C) are suitable only for applications that do not require operation below -50°C. Verify application temperature requirements before selection.

Q: Are Littelfuse SMBJ36CA-HR and SMBJ36CA-HRA interchangeable?

A: Both Littelfuse parts (SMBJ36CA-HR and SMBJ36CA-HRA) share identical electrical specifications (58.1V clamping, 10.4A peak pulse) and operating temperature range (-65°C to 150°C). The suffix designation (-HR versus -HRA) indicates internal manufacturing or qualification differences. Consult Littelfuse documentation for specific application requirements.

Q: Can MDD SMBJ36CA be used in high-reliability applications?

A: MDD SMBJ36CA is RoHS3 compliant and MSL 1 rated but operates within a narrower temperature range (-50°C to 150°C) compared to other substitutes. Selection for high-reliability applications requires verification that the -50°C lower limit meets system requirements and that MDD manufacturing certifications align with application qualification standards.

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