SMBJ5936B-TP Equivalent & Substitute Parts

Part Overview

The SMBJ5936B-TP is an active-status Zener diode manufactured by Micro Commercial Co, rated for 30 V nominal Zener voltage with 1.5 W maximum power dissipation. This surface mount component in DO-214AA (SMB) package is designed for interface applications requiring voltage regulation and transient protection. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	30	V
Tolerance	±5%	%
Power - Max	1.5	W
Impedance (Max)	28	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 22.8 V
Voltage - Forward (Vf) (Max) @ If	1.5	V @ 200 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	DO-214AA (SMB)	—

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ5936B-TP is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage (Nom): 30 V
Tolerance: ±5%
Package / Case: DO-214AA (SMB)
Mounting Type: Surface Mount

Secondary Compatibility Parameters:

Power - Max: 1.5 W (or higher)
Impedance (Max): ≤28 Ohms
Current - Reverse Leakage @ Vr: ≤1 µA @ 22.8 V
Voltage - Forward (Vf) (Max) @ If: ≤1.5 V @ 200 mA
Operating Temperature Range: -55°C to 150°C (or wider)

Substitute parts must satisfy all primary matching criteria and maintain compatibility within secondary parameters to ensure functional equivalence in circuit applications.

Parameter Comparison

Parameter	SMBJ5936B-TP (Main)	1SMB5936B-13	SMZJ3800B-E3/52
Manufacturer	Micro Commercial Co	Diodes Incorporated	Vishay General Semiconductor - Diodes Division
Voltage - Zener (Nom)	30 V	30 V	30 V
Tolerance	±5%	±5%	±5%
Power - Max	1.5 W	550 mW	1.5 W
Impedance (Max)	28 Ohms	28 Ohms	26 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 22.8 V	1 µA @ 22.8 V	5 µA @ 22.8 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.5 V @ 200 mA	Not specified
Operating Temperature Range	-55°C to 150°C	-65°C to 150°C	-55°C to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-214AA (SMB)	DO-214AA (SMB)	DO-214AA (SMB)
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)
Product Status	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

SMBJ5936B-TP (Main Part) All three parts maintain active product status and REACH compliance. The SMBJ5936B-TP is supplied in Bulk packaging and serves as the primary reference component.

1SMB5936B-13 (Diodes Incorporated) This substitute is electrically compatible with the main part across all primary matching criteria. The maximum power rating of 550 mW is lower than the main part's 1.5 W specification. This part is ROHS3 compliant and supplied in Tape & Reel packaging. Selection of this part is appropriate for applications where power dissipation does not exceed 550 mW. The extended operating temperature range (-65°C to 150°C) provides additional thermal margin.

SMZJ3800B-E3/52 (Vishay General Semiconductor - Diodes Division) This substitute meets all primary matching criteria with identical 1.5 W power rating and matching operating temperature range. The impedance specification (26 Ohms) is lower than the main part (28 Ohms), providing improved performance characteristics. Reverse leakage current is specified at 5 µA, which is higher than the main part's 1 µA specification. This part is ROHS3 compliant and supplied in Tape & Reel packaging.

Frequently Asked Questions (FAQ)

Q: Can 1SMB5936B-13 be used as a direct replacement for SMBJ5936B-TP?

A: The 1SMB5936B-13 is electrically compatible for applications where power dissipation remains below 550 mW. The lower power rating is the limiting factor for direct substitution. If the circuit design requires the full 1.5 W capability of the SMBJ5936B-TP, the 1SMB5936B-13 is not suitable.

Q: What is the difference between Bulk and Tape & Reel packaging?

A: Bulk packaging supplies components loose, suitable for manual assembly or small-volume applications. Tape & Reel packaging supplies components on continuous tape for automated pick-and-place assembly equipment. Both packaging formats contain the same component; the difference is in handling and assembly methodology.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the DO-214AA (SMB) package with identical pin configuration and footprint, enabling direct PCB-level substitution without layout modifications.

Q: Does the impedance difference between SMZJ3800B-E3/52 (26 Ohms) and SMBJ5936B-TP (28 Ohms) affect circuit performance?

A: Lower impedance generally provides improved transient response characteristics. The 2 Ohm difference is within typical circuit tolerance margins and does not prevent substitution. Circuit-specific performance validation may be warranted for applications with stringent transient response requirements.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates the component meets the Restriction of Hazardous Substances Directive 3, restricting the use of specific hazardous materials in electrical and electronic equipment. The SMBJ5936B-TP does not specify RoHS status, while both substitute parts are explicitly ROHS3 compliant.

Q: Can SMZJ3800B-E3/52 be used in applications requiring the lowest reverse leakage current?

A: The SMZJ3800B-E3/52 specifies 5 µA reverse leakage current compared to 1 µA for the SMBJ5936B-TP. For applications with strict reverse leakage requirements, the SMBJ5936B-TP or 1SMB5936B-13 are preferred selections.

Q: What is the significance of the ±5% tolerance specification?

A: The ±5% tolerance indicates the Zener voltage will fall within the range of 28.5 V to 31.5 V across the specified operating temperature range and production lot variations. All three parts share this tolerance specification, ensuring equivalent voltage regulation performance.

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