Equivalent & Substitute Parts for SMBJ5377A/TR13

Part Overview

SMBJ5377A/TR13 is a Zener diode manufactured by Microchip Technology, categorized under Diodes, Zener. Its electrical characteristics include a nominal Zener voltage of 91 V, maximum power of 5 W, ±10% tolerance, and a surface mount DO-214AA (SMBJ) package profile. The part is RoHS non-compliant and has an active product status with current inventory available. Identifying equivalent or substitute models is essential when stock levels, compliance requirements, or qualification grades dictate alternate sourcing while maintaining required electrical and mechanical specifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMBJ5377A/TR13
Voltage - Zener (Nom) (Vz)	91 V
Tolerance	±10%
Power - Max	5 W
Impedance (Max) (Zzt)	75 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 65.5 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1 A
Operating Temperature	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	DO-214AA, SMB
Supplier Device Package	SMBJ (DO-214AA)
RoHS Status	RoHS non-compliant
Product Status	Active

Substitute Part Grouping Explanation

Equivalent and substitute Zener diodes are grouped by matching the following strictly defined parameters: nominal Zener voltage (Vz), maximum allowable power dissipation, package/case (mechanical fit), and surface mount compatibility. Other factors such as tolerance, reverse leakage current, forward voltage, and maximum impedance must also align within application-specific constraints. These parameters ensure form, fit, and functional equivalency for direct substitution in compliant designs.

Strictly compared parameters:

Nominal Zener voltage (Vz)
Power dissipation (W)
Package/case (e.g., DO-214AA, SMB)
Mounting type
Operating temperature range
Reverse leakage current
RoHS and regulatory compliance (for environmental and process controls)

Parameter Comparison

Parameter	SMBJ5377A/TR13 (Microchip Technology)	SZ1SMB5948BT3G (onsemi)
Voltage - Zener (Nom) (Vz)	91 V	91 V
Power - Max	5 W	3 W
Impedance (Max) (Zzt)	75 Ohms	200 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 65.5 V	1 µA @ 69.2 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1 A	1.5 V @ 200 mA
Operating Temperature	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	DO-214AA, SMB	DO-214AA, SMB
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Product Status	Active	Active

Engineering Selection Recommendations

Select SZ1SMB5948BT3G when environmental or supply chain requirements specify compliance to ROHS3 or automotive-grade qualification (AEC-Q101). SMBJ5377A/TR13 is appropriate where 5 W power dissipation and original RoHS status are required. Both components maintain an active production status, ensuring ongoing availability for new designs and replacements.

Frequently Asked Questions (FAQ)

Q1: What are the core substitution criteria for Zener diodes in the DO-214AA (SMB) package?
A1: Substitution requires matched nominal Zener voltage, package/case, mounting type, power dissipation, and operating temperature range.

Q2: Why does power dissipation matter for direct substitution?
A2: Power dissipation must meet or exceed application requirements to ensure safe thermal performance.

Q3: How does package compatibility affect mechanical fit?
A3: Both SMBJ5377A/TR13 and SZ1SMB5948BT3G use the DO-214AA (SMB) case, ensuring footprint and height alignment for surface mount designs.

Q4: Are there differences in RoHS compliance and how does this affect selection?
A4: SMBJ5377A/TR13 is RoHS non-compliant; SZ1SMB5948BT3G is ROHS3 compliant. Selection depends on environmental and regulatory requirements of the end product.

Q5: Should tolerance and impedance be considered for substitution?
A5: Tolerance and maximum impedance are critical for voltage regulation accuracy and stability and must match system design allowances.

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