Equivalent & Substitute Parts: SMBJ4737/TR13 Zener Diode Reference

Part Overview

SMBJ4737/TR13, manufactured by Microchip Technology, is a surface mount Zener diode specified at 7.5 V nominal Zener voltage, 2 W maximum power dissipation, and housed in the DO-214AA (SMBJ) package. The product is currently active with inventory available. Engineers may require alternative models for reasons including inventory matching, compliance needs (RoHS), or mechanical fitting within the same package outline.

Key Parameters

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	Supplier Device Package	RoHS Status	Moisture Sensitivity Level (MSL)	REACH Status	Product Status
SMBJ4737/TR13	Microchip Technology	Diodes, Zener	Tape & Reel (TR)	7.5 V	±10%	2 W	4 Ohms	10 µA @ 5 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	Active

Substitute Part Grouping Explanation

Substitute relationships are determined strictly by matching the following parameters:

Zener Voltage (Vz)
Tolerance
Power Rating (W)
Maximum Impedance (Zzt)
Reverse Leakage Current at Specified Voltage
Forward Voltage at Specified Forward Current
Operating Temperature Range
Package / Mounting Type
Moisture Sensitivity Level (MSL)
RoHS / REACH Compliance
Product Status

Parts included as substitutes must closely align with these electrical, mechanical, and compliance parameters.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Category	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	Moisture Sensitivity Level (MSL)	RoHS Status	REACH Status	Product Status
SMBJ4737/TR13	Microchip Technology	Diodes, Zener	7.5 V	±10%	2 W	4 Ohms	10 µA @ 5 V	1.2 V @ 200 mA	-65°C ~ 150°C	Surface Mount	DO-214AA, SMB	1 (Unlimited)	RoHS non-compliant	REACH Unaffected	Active
1SMB5922B-13	Diodes Incorporated	Diodes, Zener	7.5 V	±5%	3 W	3 Ohms	5 µA @ 6 V	1.5 V @ 200 mA	-65°C ~ 150°C	Surface Mount	DO-214AA, SMB	1 (Unlimited)	ROHS3 Compliant	REACH Unaffected	Active

Engineering Selection Recommendations

When evaluating substitute Zener diodes, consider product status and compliance attributes. Both SMBJ4737/TR13 and 1SMB5922B-13 are active and available. The main part, SMBJ4737/TR13, is RoHS non-compliant, while 1SMB5922B-13 is ROHS3 compliant. Both are unaffected by REACH and rated as Moisture Sensitivity Level 1 (Unlimited).

Frequently Asked Questions (FAQ)

Q1: What primary parameters should be matched when substituting a Zener diode in the DO-214AA, SMB package?
A1: Substitution must be based on Zener voltage, tolerance, power, impedance, reverse leakage current, forward voltage at rated current, operating temperature, mounting type, and package compatibility.

Q2: Is there a difference in compliance between SMBJ4737/TR13 and its substitute?
A2: SMBJ4737/TR13 is RoHS non-compliant. 1SMB5922B-13 is ROHS3 compliant.

Q3: Are both diodes compatible in terms of mechanical mounting and package?
A3: Both are surface mount devices supplied in the DO-214AA (SMB) package.

Q4: How does tolerance and power rating affect substitution?
A4: 1SMB5922B-13 offers tighter tolerance (±5% vs. ±10%) and higher power rating (3 W vs. 2 W).

Q5: What is the temperature operating range for these diodes?
A5: Both diodes support an operating temperature of -65°C to +150°C.

Q6: Is moisture sensitivity comparable for these parts?
A6: Both parts have an MSL rating of 1 (Unlimited).

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message