BYX86TR Equivalent & Substitute Parts

Part Overview

The BYX86TR is a 1000 V, 2 A avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, packaged in SOD-57 axial configuration with Tape & Reel (TR) delivery. This component is classified as Active and RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, packaging format preferences, or design optimization needs.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 1 A
Reverse Recovery Time (trr)	4 µs
Current - Reverse Leakage @ Vr	1 µA @ 1000 V
Package / Case	SOD-57, Axial
Mounting Type	Through Hole
Operating Temperature - Junction	-55°C ~ 175°C
Technology	Avalanche
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the BYX86TR is determined by the following criteria:

Primary Equivalence Parameters:

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 2 A
Package / Case: SOD-57, Axial
Mounting Type: Through Hole
Technology: Avalanche

Packaging Format Variants: Substitute parts within the BYX86 and BYW56 series maintain identical electrical specifications and SOD-57 package geometry but differ in delivery format (Tape & Reel versus Cut Tape). These variants are mechanically and electrically interchangeable.

Cross-Technology Substitutes: Parts HER208G-TP and EGP20K represent alternative technologies (Standard recovery diodes) with different electrical characteristics. These are listed as manufacturer-recommended alternatives but operate under different performance parameters, including forward voltage, recovery time, and reverse leakage specifications.

Parameter Comparison

Parameter	BYX86TR	BYX86TAP	BYW56-TR	BYW56-TAP	HER208G-TP	EGP20K
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V	1000 V	1000 V	800 V
Current - Average Rectified (Io)	2 A	2 A	2 A	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 1 A	1 V @ 1 A	1 V @ 1 A	1 V @ 1 A	1.7 V @ 2 A	1.7 V @ 2 A
Reverse Recovery Time (trr)	4 µs	4 µs	4 µs	4 µs	75 ns	75 ns
Current - Reverse Leakage @ Vr	1 µA @ 1000 V	1 µA @ 1000 V	1 µA @ 1000 V	1 µA @ 1000 V	5 µA @ 1000 V	5 µA @ 800 V
Package / Case	SOD-57, Axial	SOD-57, Axial	SOD-57, Axial	SOD-57, Axial	DO-15, Axial	DO-15, Axial
Technology	Avalanche	Avalanche	Avalanche	Avalanche	Standard	Standard
Operating Temperature - Junction	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 150°C	-65°C ~ 150°C
Product Status	Active	Active	Active	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant

Engineering Selection Recommendations

Direct Equivalents (Avalanche Technology, SOD-57 Package):

BYX86TAP, BYW56-TR, and BYW56-TAP are direct electrical and mechanical equivalents to the BYX86TR. These parts maintain identical voltage, current, and recovery characteristics while differing only in delivery packaging format (Cut Tape versus Tape & Reel). All three are Active products with ROHS3 compliance and unlimited moisture sensitivity rating. Selection among these variants depends solely on procurement and assembly process requirements.

Alternative Technology Substitutes (Standard Recovery Diodes, DO-15 Package):

HER208G-TP and EGP20K represent alternative diode technologies with different electrical performance profiles. HER208G-TP is an Active product with ROHS3 compliance, matching the 1000 V reverse voltage specification but introducing higher forward voltage (1.7 V @ 2 A versus 1 V @ 1 A), faster recovery time (75 ns versus 4 µs), and higher reverse leakage (5 µA @ 1000 V versus 1 µA @ 1000 V). The package format changes from SOD-57 to DO-15, requiring PCB layout modification. EGP20K is classified as Obsolete and RoHS non-compliant, with reduced reverse voltage rating (800 V), and is not recommended for new designs.

Compliance Considerations:

All Active substitute parts (BYX86TAP, BYW56-TR, BYW56-TAP, HER208G-TP) maintain ROHS3 compliance and REACH unaffected status. EGP20K does not meet current RoHS requirements and carries Obsolete product status, making it unsuitable for applications requiring regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can BYX86TAP, BYW56-TR, and BYW56-TAP be used interchangeably with BYX86TR?

A: Yes. These parts are electrically and mechanically identical to the BYX86TR. The differences are limited to delivery packaging format: BYX86TR is supplied in Tape & Reel (TR), while BYX86TAP, BYW56-TR, and BYW56-TAP are supplied in Cut Tape (CT). All maintain the same SOD-57 axial package geometry, electrical specifications, and compliance certifications.

Q: What are the key differences between avalanche diodes (BYX86TR series) and standard recovery diodes (HER208G-TP)?

A: Avalanche diodes in the BYX86TR series exhibit lower forward voltage (1 V @ 1 A) and slower recovery time (4 µs), making them suitable for voltage regulation and transient suppression applications. Standard recovery diodes like HER208G-TP have higher forward voltage (1.7 V @ 2 A) and faster recovery (75 ns), optimized for general-purpose rectification. Additionally, HER208G-TP uses a DO-15 package instead of SOD-57, requiring different PCB footprints.

Q: Is EGP20K a suitable substitute for BYX86TR?

A: No. EGP20K is classified as Obsolete and does not comply with RoHS standards. Additionally, it has a reduced reverse voltage rating of 800 V compared to the 1000 V specification of BYX86TR. This part is not recommended for new designs or applications requiring regulatory compliance.

Q: What is the impact of package format differences (Tape & Reel versus Cut Tape) on component selection?

A: Package format differences do not affect electrical performance or mechanical compatibility. The choice between Tape & Reel (TR) and Cut Tape (CT) variants is determined by assembly process requirements. Tape & Reel packaging is optimized for automated pick-and-place assembly, while Cut Tape is suitable for manual or semi-automated processes. Both formats use identical SOD-57 axial package geometry.

Q: Can HER208G-TP replace BYX86TR in all applications?

A: No. While HER208G-TP matches the 1000 V reverse voltage and 2 A current specifications, it introduces significant differences in forward voltage, recovery time, and package format. The higher forward voltage (1.7 V @ 2 A) and faster recovery time (75 ns) alter circuit behavior, particularly in voltage regulation and transient suppression applications. The DO-15 package requires PCB layout modification. Substitution is only valid when circuit design accommodates these electrical differences and package changes.

Q: What compliance certifications should be verified when selecting a substitute part?

A: All substitute parts should maintain ROHS3 compliance and REACH unaffected status for applications subject to regulatory requirements. BYX86TR, BYX86TAP, BYW56-TR, BYW56-TAP, and HER208G-TP all meet these standards. EGP20K does not comply with RoHS requirements and should not be used in regulated applications.

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