BZX85B3V0-TAP Equivalent & Substitute Zener Diodes Reference

Part Overview

The Vishay BZX85B3V0-TAP is a Zener diode in the DO-204AL (DO-41) axial through-hole package, designed for voltage regulation applications with a nominal Zener voltage of 3 V, and a power dissipation rating of 1.3 W. The device offers ±2% voltage tolerance and features low reverse leakage and maximum impedance, supporting operation in automotive-grade environments with AEC-Q101 qualification. The product is currently active and RoHS3 compliant. Sourcing alternative models is essential to address supply chain requirements, ensure continuity of design, and maintain compliance with automotive and environmental standards.

Key Parameters

Parameter	Main Part (BZX85B3V0-TAP)	Unit
Voltage - Zener (Nom) (Vz)	3 V	V
Tolerance	±2%	%
Power - Max	1.3 W	W
Impedance (Max) (Zzt)	20 Ohms	Ω
Current - Reverse Leakage @ Vr	100 µA @ 1 V	µA @ V
Operating Temperature	-55°C ~ 175°C	°C
Mounting Type	Through Hole	-
Package / Case	DO-204AL (DO-41), Axial	-
Grade / Qualification	Automotive, AEC-Q101	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution is limited strictly to Zener diodes matching the following key parameters: nominal Zener voltage (Vz), power dissipation, voltage tolerance, maximum impedance, reverse leakage current, package/case, mounting type, operating temperature range, compliance with automotive and RoHS3 status, and qualification grade. All substitutes listed meet the basic requirements for Zener voltage and mechanical form factor, ensuring electrical and physical compatibility within specified operating conditions.

Parameter Comparison

Parameter	BZX85B3V0-TAP (Vishay)	NZX3V0B,133 (NXP USA Inc.)
Voltage - Zener (Nom) (Vz)	3 V	3 V
Tolerance	±2%	±3%
Power - Max	1.3 W	500 mW
Impedance (Max) (Zzt)	20 Ohms	100 Ohms
Current - Reverse Leakage @ Vr	100 µA @ 1 V	10 µA @ 1 V
Operating Temperature	-55°C ~ 175°C	-55°C ~ 175°C
Mounting Type	Through Hole	Through Hole
Package / Case	DO-204AL (DO-41), Axial	DO-204AH (DO-35), Axial
RoHS Status	ROHS3 Compliant	-

Engineering Selection Recommendations

Select substitute Zener diodes based on active product status, RoHS compliance, and the specified automotive and qualification grades. Evaluate inventory availability and ensure that the chosen part strictly matches the environmental and qualification requirements of the intended application, as indicated by the provided parameters.

Frequently Asked Questions (FAQ)

Q1: What are the minimum required parameters for Zener diode substitution?
A1: Substitution requires matching nominal Zener voltage, power dissipation, voltage tolerance, maximum impedance, reverse leakage, package/case, mounting type, and operating temperature.

Q2: How critical is the package type when selecting substitutes?
A2: Only packages specified as DO-204AL (DO-41) or compatible axial styles are considered equivalent for mechanical and assembly compatibility.

Q3: Is automotive qualification or AEC-Q101 needed for all substitutes?
A3: Substitute selection follows the specified grade and qualification fields; compliance to AEC-Q101 and stated grade is required only if listed.

Q4: What compliance standards must be maintained in substitution?
A4: Substitute parts must meet the provided RoHS and environmental standards, as indicated by the RoHS Status parameter.

Q5: Does a difference in package or case number exclude a suggested substitute?
A5: Only the listed package/case styles in the specification are included for substitution. If a package is not listed, it is not considered equivalent.

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