Equivalent & Substitute Parts for SMBJ4751A/TR13 Zener Diode

Part Overview

SMBJ4751A/TR13 from Microchip Technology is an active Zener Diode with a nominal Zener voltage of 30 V, maximum power rating of 2 W, and ±5% tolerance in a DO-214AA (SMBJ) surface mount package. This component serves surge protection and voltage regulation functions in electronic circuits. Identifying alternative models is required due to procurement needs, compliance criteria (RoHS status, MSL, REACH), and supply chain considerations.

Key Parameters

Manufacturer Part Number	Manufacturer	Category	Packaging	Description	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Voltage - Forward (Vf) (Max) @ If	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	RoHS Status	Moisture Sensitivity Level (MSL)	REACH Status	ECCN	HTSUS	Product Status
SMBJ4751A/TR13	Microchip Technology	Diodes, Zener	Tape & Reel (TR)	Zener Diode 30 V 2 W ±5% Surface Mount SMBJ (DO-214AA)	30 V	±5%	2 W	40 Ohms	5 µA @ 22.8 V	1.2 V @ 200 mA	-65°C ~ 150°C	Surface Mount	DO-214AA, SMB	SMBJ (DO-214AA)	RoHS non-compliant	1 (Unlimited)	REACH Unaffected	EAR99	8541.10.0050	Active

Substitute Part Grouping Explanation

Substitution is determined by matching the following key parameters: category, package/case, mounting type, Zener voltage (30 V), tolerance (±5%), operating temperature range (-65°C ~ 150°C), and product status. Power rating, impedance, reverse leakage current, and compliance certifications dictate suitability for functional and regulatory replacement.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Category	Packaging	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Voltage - Forward (Vf) (Max) @ If	Operating Temperature	Mounting Type	Package / Case	RoHS Status	Moisture Sensitivity Level (MSL)	REACH Status	ECCN	HTSUS	Product Status
SMBJ4751A/TR13	Microchip Technology	Diodes, Zener	Tape & Reel (TR)	30 V	±5%	2 W	40 Ohms	5 µA @ 22.8 V	1.2 V @ 200 mA	-65°C ~ 150°C	Surface Mount	DO-214AA, SMB	RoHS non-compliant	1 (Unlimited)	REACH Unaffected	EAR99	8541.10.0050	Active
1SMB5936B-13	Diodes Incorporated	Diodes, Zener	Tape & Reel (TR)	30 V	±5%	550 mW	28 Ohms	1 µA @ 22.8 V	1.5 V @ 200 mA	-65°C ~ 150°C	Surface Mount	DO-214AA, SMB	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	EAR99	8541.10.0050	Active

Engineering Selection Recommendations

Both SMBJ4751A/TR13 and 1SMB5936B-13 are active products with shared package format (DO-214AA, SMB), mounting type, and Zener voltage (30 V) within ±5% tolerance. Regulatory compliance differs: SMBJ4751A/TR13 is RoHS non-compliant, while 1SMB5936B-13 is ROHS3 compliant. Both parts have MSL 1 and are REACH unaffected. For applications requiring RoHS compliance or regulatory conformity, select 1SMB5936B-13. For legacy designs not requiring RoHS, SMBJ4751A/TR13 remains suitable within the provided electrical parameters.

Frequently Asked Questions (FAQ)

Q: What parameters must match for Zener diode substitution in the DO-214AA package?
A: Substitution requires matching Zener voltage (30 V), tolerance (±5%), operating temperature range, mounting type (surface mount), and package/case (DO-214AA, SMB). Product status and compliance certifications are also required criteria.

Q: Is the power rating relevant when substituting these Zener diodes?
A: Yes. Power rating determines maximum allowable dissipation, which must meet application demands within the provided parameter list for compatibility.

Q: Are there differences in RoHS and REACH compliance between these parts?
A: SMBJ4751A/TR13 is RoHS non-compliant. 1SMB5936B-13 is ROHS3 compliant. Both are REACH unaffected.

Q: Do both alternative parts fit physically in the same PCB footprint?
A: Both utilize the DO-214AA, SMB surface mount package, which aligns with standard footprint for this category.

Q: Are both parts available with unlimited moisture sensitivity level (MSL)?
A: Both SMBJ4751A/TR13 and 1SMB5936B-13 are rated MSL 1 (Unlimited).

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