SMBJ5361A/TR13 Equivalent & Substitute Parts

Part Overview

The SMBJ5361A/TR13 is a 27 V, 5 W Zener diode manufactured by Microchip Technology in Surface Mount Device (SMD) packaging (DO-214AA/SMB). This component is classified as an active product and is used for voltage regulation and transient protection in electronic circuits. The part is currently in stock with 1009 units available.

Substitute parts are identified based on matching the core electrical specifications: nominal Zener voltage of 27 V, surface mount package compatibility (DO-214AA/SMB), and operating temperature range of -65°C to 150°C. Alternative sources provide equivalent voltage regulation capability with variations in power dissipation ratings, impedance characteristics, and compliance certifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	27	V
Power - Max	5	W
Tolerance	±10%	-
Impedance (Max)	5	Ohms
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	DO-214AA, SMB	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Primary Matching Criteria:

Nominal Zener voltage: 27 V (exact match required)
Package type: DO-214AA/SMB (physical and electrical compatibility)
Operating temperature range: -65°C to 150°C (minimum requirement)
Mounting type: Surface Mount (assembly compatibility)

Secondary Considerations:

Voltage tolerance (±10% or tighter acceptable)
Power dissipation rating (equal or greater acceptable for direct substitution)
Impedance characteristics (lower impedance acceptable)
Reverse leakage current specifications

All identified substitute parts meet the primary matching criteria. Variations exist in power ratings (550 mW to 3 W), impedance values (23 Ohms vs. 5 Ohms), and compliance certifications (RoHS status and automotive qualification).

Parameter Comparison

Parameter	SMBJ5361A/TR13 (Microchip)	1SMB5935B-13 (Diodes Inc.)	1SMB5935BT3G (onsemi)	SZ1SMB5935BT3G (onsemi)
Manufacturer	Microchip Technology	Diodes Incorporated	onsemi	onsemi
Voltage - Zener (Nom)	27 V	27 V	27 V	27 V
Tolerance	±10%	±5%	±5%	±5%
Power - Max	5 W	550 mW	3 W	3 W
Impedance (Max)	5 Ohms	23 Ohms	23 Ohms	23 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 19.4 V	1 µA @ 20.6 V	1 µA @ 20.6 V	1 µA @ 20.6 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1 A	1.5 V @ 200 mA	1.5 V @ 200 mA	1.5 V @ 200 mA
Operating Temperature	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active
Automotive Grade	-	-	-	AEC-Q101 Qualified

Engineering Selection Recommendations

Direct Substitution Suitability:

The 1SMB5935BT3G (onsemi) and SZ1SMB5935BT3G (onsemi) are suitable direct substitutes for the SMBJ5361A/TR13 in applications where power dissipation does not exceed 3 W. Both parts maintain the 27 V nominal Zener voltage, operate across the identical temperature range, and are packaged in the same DO-214AA/SMB form factor. The onsemi parts feature tighter voltage tolerance (±5% vs. ±10%) and ROHS3 compliance, representing improved environmental and regulatory alignment.

The SZ1SMB5935BT3G variant includes AEC-Q101 automotive qualification, making it suitable for automotive and high-reliability applications requiring formal qualification documentation.

Limited Substitution Suitability:

The 1SMB5935B-13 (Diodes Incorporated) is a functional substitute with the same 27 V Zener voltage and package type. However, its 550 mW maximum power rating is significantly lower than the SMBJ5361A/TR13 (5 W). This part is suitable only for applications where power dissipation remains below 550 mW. The 1SMB5935B-13 is available in Tape & Reel packaging and offers ROHS3 compliance.

Compliance Considerations:

All substitute parts are ROHS3 compliant, whereas the SMBJ5361A/TR13 is RoHS non-compliant. Selection of substitute parts aligns designs with current environmental regulations. The SZ1SMB5935BT3G provides additional automotive-grade qualification for regulated industries.

Frequently Asked Questions (FAQ)

Q: Can the 1SMB5935B-13 replace the SMBJ5361A/TR13 in all applications?

A: The 1SMB5935B-13 is functionally compatible for voltage regulation at 27 V but has a maximum power dissipation of 550 mW compared to the SMBJ5361A/TR13's 5 W rating. Substitution is limited to applications where power dissipation does not exceed 550 mW. For higher power applications, the 1SMB5935BT3G or SZ1SMB5935BT3G (both rated 3 W) are more appropriate choices.

Q: What is the difference between the two onsemi parts (1SMB5935BT3G and SZ1SMB5935BT3G)?

A: Both onsemi parts share identical electrical specifications: 27 V nominal Zener voltage, 3 W maximum power, ±5% tolerance, and DO-214AA/SMB packaging. The SZ1SMB5935BT3G includes AEC-Q101 automotive qualification and is supplied in Tape & Reel packaging. The 1SMB5935BT3G is available in Cut Tape and Digi-Reel packaging options. Selection depends on packaging requirements and whether automotive qualification is necessary.

Q: Are all substitute parts in the same physical package?

A: Yes. All substitute parts use the DO-214AA/SMB package, ensuring identical physical dimensions and PCB footprint compatibility with the SMBJ5361A/TR13. Differences exist only in packaging format (Tape & Reel vs. Cut Tape/Digi-Reel), which affects handling and assembly logistics, not component placement.

Q: How do impedance differences affect substitution?

A: The SMBJ5361A/TR13 has a maximum impedance of 5 Ohms, while all substitute parts specify 23 Ohms maximum impedance. Lower impedance (5 Ohms) provides better voltage regulation stability. Substitute parts with higher impedance (23 Ohms) are acceptable in applications with less stringent regulation requirements. For circuits requiring the lowest impedance performance, the SMBJ5361A/TR13 remains the optimal choice.

Q: What does RoHS compliance mean for component selection?

A: RoHS (Restriction of Hazardous Substances) compliance indicates the component meets environmental regulations restricting lead, cadmium, mercury, and other hazardous materials. The SMBJ5361A/TR13 is RoHS non-compliant, while all substitute parts are ROHS3 compliant. For new designs and regulated markets, ROHS3-compliant substitutes are required.

Q: Is the SZ1SMB5935BT3G suitable for automotive applications?

A: Yes. The SZ1SMB5935BT3G carries AEC-Q101 automotive qualification, indicating it meets automotive industry reliability and performance standards. This part is suitable for automotive and high-reliability applications requiring formal qualification documentation.

Q: What is the significance of voltage tolerance differences?

A: The SMBJ5361A/TR13 has ±10% tolerance, while substitute parts have ±5% tolerance. Tighter tolerance (±5%) means the actual Zener voltage remains closer to the nominal 27 V specification across the production range. For applications requiring precise voltage regulation, the ±5% tolerance of substitute parts provides superior performance.

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