BZX85C82-TAP Equivalent & Substitute Parts

Part Overview

The BZX85C82-TAP is a Zener diode rated at 82 V, 1.3 W, manufactured by Vishay General Semiconductor - Diodes Division in the DO-204AL (DO-41) axial through-hole package. This component is classified as obsolete, though 923 pieces remain in stock as new original inventory. The part is AEC-Q101 qualified for automotive applications and complies with ROHS3 and REACH regulations.

Substitute parts are necessary due to the obsolete product status of the BZX85C82-TAP. Identifying equivalent components ensures design continuity and supply chain reliability for applications requiring 82 V Zener diodes with compatible electrical and mechanical characteristics.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	82 V
Power - Max	1.3 W
Tolerance	±5%
Impedance (Max)	200 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 62 V
Operating Temperature Range	-55°C to 175°C
Mounting Type	Through Hole
Package / Case	DO-204AL (DO-41), Axial
Grade	Automotive
Qualification	AEC-Q101

Substitute Part Grouping Explanation

Substitution of the BZX85C82-TAP is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 82 V nominal
Package type: DO-204AL (DO-41) axial through-hole configuration
Operating temperature range compatibility
Power dissipation capability equal to or greater than 1.3 W

Secondary Compatibility Factors:

Voltage tolerance (±5% preferred for precision applications)
Impedance characteristics (200 Ohms maximum for the main part)
Reverse leakage current specifications
RoHS and REACH compliance status

Substitute parts are grouped into two categories based on mounting technology and power rating:

Category 1: Through-Hole Axial Packages (Direct Mechanical Replacement) Parts maintaining the DO-204AL (DO-41) through-hole axial configuration: 1N3042B-1, 1N5947AG, 1N5947DG, 2EZ82D5, 2EZ82D5/TR12, 2EZ82D5/TR8, 2EZ82D5E3/TR12, 2EZ82D/TR12, 2EZ82D/TR8

Category 2: Surface Mount Alternative Part with different mounting technology: 1N4762AUR (DO-213AB MELF surface mount)

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Power (Max)	Tolerance	Zzt (Max)	Ir @ Vr	Temp Range	Package	Mount Type	Status
BZX85C82-TAP	Vishay	82 V	1.3 W	±5%	200 Ω	500 nA @ 62 V	-55 to 175°C	DO-204AL	Through Hole	Obsolete
1N3042B-1	Microchip	82 V	1 W	±5%	200 Ω	10 µA @ 62.2 V	-55 to 175°C	DO-204AL	Through Hole	Active
1N4762AUR	Microchip	82 V	1 W	±5%	200 Ω	5 µA @ 62.2 V	-65 to 175°C	DO-213AB	Surface Mount	Active
1N5947AG	Microsemi	82 V	1.25 W	±10%	160 Ω	1 µA @ 62.2 V	-65 to 175°C	DO-204AL	Through Hole	Active
1N5947DG	Microsemi	82 V	1.25 W	±1%	160 Ω	1 µA @ 62.2 V	-65 to 175°C	DO-204AL	Through Hole	Active
2EZ82D5	Microsemi	82 V	2 W	±5%	100 Ω	500 nA @ 62.2 V	-65 to 150°C	DO-204AL	Through Hole	Active
2EZ82D5/TR12	Microsemi	82 V	2 W	±5%	100 Ω	500 nA @ 62.2 V	-65 to 150°C	DO-204AL	Through Hole	Active
2EZ82D5/TR8	Microsemi	82 V	2 W	±5%	100 Ω	500 nA @ 62.2 V	-65 to 150°C	DO-204AL	Through Hole	Active
2EZ82D5E3/TR12	Microsemi	82 V	2 W	±5%	100 Ω	500 nA @ 62.2 V	-65 to 150°C	DO-204AL	Through Hole	Active
2EZ82D/TR12	Microsemi	82 V	2 W	±20%	100 Ω	500 nA @ 62.2 V	-65 to 150°C	DO-204AL	Through Hole	Active
2EZ82D/TR8	Microsemi	82 V	2 W	±20%	100 Ω	500 nA @ 62.2 V	-65 to 150°C	DO-204AL	Through Hole	Active

Engineering Selection Recommendations

For Direct Through-Hole Replacement (Preferred):

The 2EZ82D5 series (2EZ82D5, 2EZ82D5/TR12, 2EZ82D5/TR8, 2EZ82D5E3/TR12) provides the closest functional equivalence to the BZX85C82-TAP. These parts maintain the DO-204AL axial through-hole package, deliver 2 W power dissipation (exceeding the 1.3 W requirement), and feature ±5% tolerance matching the original specification. The 2EZ82D5 variant is ROHS3 compliant, aligning with current regulatory requirements. Operating temperature range extends to -65°C, providing enhanced low-temperature performance compared to the original -55°C minimum.

The 1N5947DG offers the tightest voltage tolerance at ±1%, suitable for precision voltage regulation applications. The 1N5947AG provides 1.25 W power rating with ±10% tolerance and active product status.

The 1N3042B-1 maintains identical electrical specifications (82 V, ±5% tolerance, 200 Ω impedance) and operating temperature range but delivers 1 W power dissipation, which is below the original 1.3 W specification. This part is suitable only for applications where power dissipation does not exceed 1 W.

For Surface Mount Applications:

The 1N4762AUR is a surface mount alternative in DO-213AB (MELF) package with 1 W power rating and ±5% tolerance. This part is applicable only to designs utilizing surface mount technology and where power dissipation does not exceed 1 W.

Compliance Considerations:

The 2EZ82D5 and 2EZ82D5E3/TR12 variants are ROHS3 compliant. All substitute parts maintain REACH unaffected status. For automotive applications requiring AEC-Q101 qualification, the original BZX85C82-TAP remains the only qualified component in this list.

Frequently Asked Questions (FAQ)

Q: Can the 1N3042B-1 directly replace the BZX85C82-TAP?

A: The 1N3042B-1 is electrically compatible in terms of Zener voltage (82 V), tolerance (±5%), impedance (200 Ω), and operating temperature range (-55°C to 175°C). However, it delivers 1 W maximum power dissipation compared to the original 1.3 W specification. Selection depends on the actual power dissipation requirements of the application. If the circuit dissipates more than 1 W in the Zener diode, the 1N3042B-1 is not suitable.

Q: What is the advantage of the 2EZ82D5 series over other substitutes?

A: The 2EZ82D5 series provides 2 W power dissipation, which exceeds the original 1.3 W requirement and offers design margin. These parts maintain the DO-204AL through-hole package for direct mechanical compatibility, feature ±5% tolerance matching the original specification, and are available in active product status with high inventory levels. The 2EZ82D5 variant is ROHS3 compliant.

Q: Can I use the 1N4762AUR as a substitute?

A: The 1N4762AUR is electrically equivalent (82 V, ±5% tolerance, 200 Ω impedance) but uses surface mount technology (DO-213AB MELF package) instead of through-hole axial configuration. This part is applicable only to designs that have been redesigned for surface mount assembly. It is not a direct mechanical replacement for through-hole applications.

Q: Why do some substitute parts have different operating temperature ranges?

A: The original BZX85C82-TAP operates from -55°C to 175°C. Several substitute parts extend the minimum temperature to -65°C, providing enhanced performance in low-temperature environments. The 2EZ82D series limits the maximum temperature to 150°C. Selection should account for the specific operating temperature requirements of the application.

Q: What is the difference between 2EZ82D5 and 2EZ82D/TR variants?

A: The 2EZ82D5 variants feature ±5% voltage tolerance, while the 2EZ82D/TR variants (2EZ82D/TR12 and 2EZ82D/TR8) have ±20% tolerance. The "/TR12" and "/TR8" designations indicate different tape and reel packaging configurations for automated assembly. Electrically, all 2EZ82D series parts deliver 2 W power dissipation and 82 V Zener voltage.

Q: Is the 1N5947DG suitable for precision voltage regulation?

A: Yes. The 1N5947DG features ±1% voltage tolerance, the tightest specification among available substitutes. It maintains 82 V Zener voltage, delivers 1.25 W power dissipation, and operates from -65°C to 175°C. This part is appropriate for applications requiring precise voltage regulation.

Q: Are all substitute parts RoHS compliant?

A: The 2EZ82D5 and 2EZ82D5E3/TR12 variants are ROHS3 compliant. The remaining substitute parts are RoHS non-compliant. For applications requiring RoHS compliance, the 2EZ82D5 series is the appropriate selection.

Q: Can I use a substitute part rated for lower power dissipation if my circuit only dissipates less power?

A: Yes. If circuit analysis confirms that Zener diode power dissipation remains below the rated maximum of a substitute part, that part is suitable. For example, if the application dissipates 0.8 W, the 1N3042B-1 (1 W rating) or 1N4762AUR (1 W rating) are acceptable. However, using parts with higher power ratings provides design margin and is generally preferred.

Q: What is the significance of impedance (Zzt) differences between parts?

A: Impedance affects the dynamic response of the Zener diode to transient voltage changes. The original BZX85C82-TAP specifies 200 Ω maximum impedance. The 1N3042B-1 and 1N4762AUR maintain this specification. The 2EZ82D and 1N5947 series specify 100 Ω and 160 Ω respectively, indicating lower impedance and potentially faster transient response. Lower impedance is generally beneficial for voltage regulation stability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message