BYX86TAP Equivalent & Substitute Parts

Part Overview

The BYX86TAP is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 1000 V DC reverse voltage and 2 A average rectified current in a SOD-57 axial through-hole package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain discontinuity, or design flexibility within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
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
Technology	Avalanche	—
Package / Case	SOD-57, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-55 to 175	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the BYX86TAP are grouped based on the following critical parameters that determine functional equivalence:

Primary Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 1000 V minimum
Current - Average Rectified (Io): 2 A
Mounting Type: Through Hole
Package compatibility: SOD-57 or equivalent axial form factor

Parametric Equivalent Classification: The BYW56-TAP maintains identical electrical specifications and package form, differing only in capacitance data availability. This part is a direct parametric equivalent suitable for one-to-one replacement.

Manufacturer Recommended Substitutes: The HER208G-TP and EGP20K are manufacturer-recommended alternatives that meet the core voltage and current requirements but introduce variations in technology type, package form, recovery characteristics, and compliance status. These parts are suitable for applications where package form flexibility is acceptable and electrical performance trade-offs are tolerable within circuit design margins.

Parameter Comparison

Parameter	BYX86TAP	BYW56-TAP	HER208G-TP	EGP20K
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	Micro Commercial Co	Nexperia USA Inc.
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V	800 V
Current - Average Rectified (Io)	2 A	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 1 A	1 V @ 1 A	1.7 V @ 2 A	1.7 V @ 2 A
Technology	Avalanche	Avalanche	Standard	Standard
Reverse Recovery Time (trr)	4 µs	4 µs	75 ns	75 ns
Current - Reverse Leakage @ Vr	1 µA @ 1000 V	1 µA @ 1000 V	5 µA @ 1000 V	5 µA @ 800 V
Package / Case	SOD-57, Axial	SOD-57, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial
Operating Temperature - Junction	-55 to 175 °C	-55 to 175 °C	-55 to 150 °C	-65 to 150 °C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant
Product Status	Active	Active	Active	Obsolete

Engineering Selection Recommendations

BYW56-TAP (Parametric Equivalent): The BYW56-TAP is the preferred direct substitute for the BYX86TAP. Both parts are manufactured by Vishay General Semiconductor, share identical electrical specifications (1000 V, 2 A, 4 µs recovery time), maintain the same SOD-57 axial package form, and are ROHS3 compliant with Active product status. This part requires no circuit redesign and provides one-to-one functional replacement.

HER208G-TP (Manufacturer Recommended Alternative): The HER208G-TP is suitable for applications where package form flexibility is acceptable. This part maintains the 1000 V reverse voltage rating and 2 A current rating but operates with faster recovery characteristics (75 ns versus 4 µs) and higher forward voltage drop (1.7 V @ 2 A versus 1 V @ 1 A). The DO-15 package form differs from SOD-57, requiring PCB layout modification. The part is ROHS3 compliant and Active status. Use this substitute only when circuit design accommodates the electrical performance differences and package form change.

EGP20K (Manufacturer Recommended Alternative): The EGP20K is not recommended for direct substitution. This part operates at reduced reverse voltage (800 V versus 1000 V), carries Obsolete product status, and is RoHS non-compliant. The DO-15 package form requires layout modification. Use only when application voltage requirements are reduced to 800 V or below and compliance requirements permit non-RoHS components.

Frequently Asked Questions (FAQ)

Q: Can the BYW56-TAP replace the BYX86TAP in all applications?

A: Yes. The BYW56-TAP is a parametric equivalent with identical voltage, current, recovery time, and package specifications. No circuit modifications are required.

Q: What are the key differences between the BYX86TAP and HER208G-TP?

A: The HER208G-TP differs in three critical areas: (1) Package form is DO-15 instead of SOD-57, requiring PCB layout changes; (2) Recovery time is 75 ns instead of 4 µs, resulting in faster switching behavior; (3) Forward voltage drop is 1.7 V @ 2 A instead of 1 V @ 1 A, increasing power dissipation. Both maintain 1000 V reverse voltage and 2 A current ratings.

Q: Is the EGP20K suitable as a substitute?

A: The EGP20K is not recommended. The reverse voltage rating is reduced to 800 V, the product is Obsolete, and it is RoHS non-compliant. Use only in applications where the 800 V rating is acceptable and compliance requirements permit non-RoHS components.

Q: What is the impact of package form differences between SOD-57 and DO-15?

A: SOD-57 and DO-15 are both axial through-hole packages but have different physical dimensions and lead spacing. Substitution requires PCB layout verification to confirm lead hole alignment and clearance. Mechanical compatibility must be confirmed before implementation.

Q: How do avalanche and standard recovery technologies differ?

A: Avalanche diodes (BYX86TAP, BYW56-TAP) are designed for voltage regulation and transient suppression with slower recovery times (4 µs). Standard recovery diodes (HER208G-TP, EGP20K) are general-purpose rectifiers with faster recovery (75 ns). Technology selection depends on circuit application requirements.

Q: Are all substitute parts RoHS3 compliant?

A: No. The BYX86TAP, BYW56-TAP, and HER208G-TP are ROHS3 compliant. The EGP20K is RoHS non-compliant. Compliance requirements must be verified before selecting a substitute.

Q: What is the significance of product status (Active versus Obsolete)?

A: Active status indicates the part is in current production with ongoing manufacturer support and availability. Obsolete status indicates the part is no longer manufactured. The EGP20K is Obsolete, which may result in limited future availability and supply chain risk.

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