SMBJ36A-13 Transient Voltage Suppressor (TVS) Diode — Equivalent & Substitute Parts

Part Overview

The SMBJ36A-13 is a unidirectional Zener-type transient voltage suppressor manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in surface-mount applications. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical performance within the specified parameter ranges. Substitute parts must match the reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse current characteristics to ensure circuit protection integrity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	36	V
Voltage - Breakdown (Min)	40	V
Voltage - Clamping (Max) @ Ipp	58.1	V
Current - Peak Pulse (10/1000µs)	10.3	A
Power - Peak Pulse	600	W
Operating Temperature	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	DO-214AA, SMB	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following electrical parameters:

Voltage - Reverse Standoff (Typ): 36V
Voltage - Breakdown (Min): 40V
Voltage - Clamping (Max) @ Ipp: 58.1V (±tolerance acceptable)
Current - Peak Pulse (10/1000µs): 10.3A (minimum requirement)
Power - Peak Pulse: 600W
Type: Zener, Unidirectional
Mounting: Surface Mount

Substitute parts are grouped into two categories:

Category A — Direct Electrical Equivalents (Same Package DO-214AA/SMB): Parts maintaining identical voltage ratings, clamping characteristics, and SMB package form factor. These provide pin-for-pin compatibility with minimal circuit board redesign.

Category B — Functional Equivalents (Alternative Packages): Parts meeting electrical specifications but utilizing different surface-mount packages (SMA, SOD-128). These require PCB layout modification but deliver equivalent protection performance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Operating Temperature	Product Status	RoHS Status
SMBJ36A-13	Diodes Incorporated	36V	40V	58.1V	10.3A	600W	DO-214AA, SMB	-55 to 150°C	Discontinued	RoHS non-compliant
SMBJ36A-13-F	Diodes Incorporated	36V	40V	58.1V	10.3A	600W	DO-214AA, SMB	-55 to 150°C	Active	ROHS3 Compliant
SMBJ36A-TP	Micro Commercial Co	36V	40V	58.1V	10.3A	600W	DO-214AA, SMB	-55 to 175°C	Active	ROHS3 Compliant
SMBJ36A	EVVO Semi	36V	40V	58.1V	10.4A	600W	DO-214AC, SMA	-65 to 150°C	Active	ROHS3 Compliant
PTVS36VP1UP,115	Nexperia USA Inc.	36V	40V	58.1V	10.3A	600W	SOD-128	-55 to 150°C	Active	ROHS3 Compliant
SACB36	Littelfuse Inc.	36V	40V	60V	8.6A	500W	DO-214AA, SMB	-55 to 150°C	Active	ROHS3 Compliant
SM6T42AY	STMicroelectronics	36V	40V	76V	52A (8/20µs)	600W	DO-214AA, SMB	-55 to 150°C	Active	ROHS3 Compliant
P6SMB36A	Eaton - Electronics Division	30.8V	34.2V	49.9V	12.2A	600W	DO-214AA, SMB	-55 to 150°C	Active	RoHS Compliant

Engineering Selection Recommendations

Primary Recommendation — SMBJ36A-13-F (Diodes Incorporated)

This part is the direct successor to the discontinued SMBJ36A-13, manufactured by the same supplier with identical electrical specifications and SMB package. It provides 100% functional compatibility with zero circuit redesign. Product status is Active with ROHS3 compliance. Inventory availability is 113,200 units.

Secondary Recommendation — SMBJ36A-TP (Micro Commercial Co)

Functionally equivalent to the original part with identical voltage and current ratings in DO-214AA/SMB package. Operating temperature range extends to 175°C, providing enhanced thermal margin. ROHS3 compliant and Active status. Suitable for direct substitution with no layout modifications required.

Alternative for Extended Temperature Range — SMBJ36A (EVVO Semi)

Meets electrical specifications with slightly higher peak pulse current (10.4A vs. 10.3A) and extended lower operating temperature (-65°C). Requires PCB layout modification due to SMA package (DO-214AC) instead of SMB. ROHS3 compliant and Active status.

Automotive-Grade Option — PTVS36VP1UP,115 (Nexperia USA Inc.)

Identical electrical performance to the original part with AEC-Q101 automotive qualification. SOD-128 package requires PCB redesign. ROHS3 compliant and Active status. Suitable for automotive applications requiring formal qualification documentation.

Not Recommended — SACB36 (Littelfuse Inc.) and SM6T42AY (STMicroelectronics)

SACB36 exhibits reduced peak pulse current (8.6A vs. 10.3A) and lower power rating (500W vs. 600W), limiting protection capability in high-energy transient events. SM6T42AY provides excessive clamping voltage (76V vs. 58.1V) and peak current (52A), introducing over-design and potential circuit compatibility issues. P6SMB36A exhibits lower reverse standoff voltage (30.8V vs. 36V) and reduced clamping voltage (49.9V vs. 58.1V), making it unsuitable for this application.

Frequently Asked Questions (FAQ)

Q: Can SMBJ36A-13-F be used as a direct replacement for SMBJ36A-13?

A: Yes. SMBJ36A-13-F is manufactured by Diodes Incorporated with identical electrical specifications (36V standoff, 58.1V clamping, 10.3A peak pulse) and SMB package. No circuit modifications are required. The primary difference is ROHS3 compliance and Active product status versus the discontinued original.

Q: What is the difference between SMB and SMA packages?

A: SMB (DO-214AA) and SMA (DO-214AC) are both surface-mount diode packages with different physical dimensions. SMA is slightly larger. Substituting between them requires PCB footprint modification and re-layout of component placement and trace routing.

Q: Why is SM6T42AY not recommended despite being in the same SMB package?

A: SM6T42AY has a clamping voltage of 76V compared to the required 58.1V, and peak pulse current of 52A versus 10.3A. This over-design introduces unnecessary cost and may cause circuit compatibility issues in applications designed for the lower voltage specification.

Q: Is SACB36 a suitable substitute?

A: No. SACB36 has reduced peak pulse current (8.6A vs. 10.3A) and lower power rating (500W vs. 600W). In high-energy transient protection scenarios, this reduced capability may fail to adequately suppress overvoltage events, compromising circuit protection.

Q: What does ROHS3 compliance mean?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the part meets European environmental standards restricting lead, cadmium, mercury, and other hazardous substances. The original SMBJ36A-13 is RoHS non-compliant; all active substitutes are ROHS3 compliant.

Q: Can PTVS36VP1UP,115 be used in non-automotive applications?

A: Yes. PTVS36VP1UP,115 meets the electrical specifications for general-purpose TVS applications. AEC-Q101 automotive qualification is an additional certification that does not restrict use in non-automotive circuits. The SOD-128 package requires PCB redesign.

Q: What is the operating temperature range consideration?

A: The original SMBJ36A-13 operates from -55°C to 150°C. SMBJ36A-TP extends to 175°C, and SMBJ36A (EVVO Semi) extends to -65°C. Select based on application thermal requirements. Extended range provides design margin but may not be necessary for all applications.

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