BYT53A-TR Equivalent & Substitute Parts

Part Overview

The BYT53A-TR is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 50V DC reverse voltage and 1.9A 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 is required but the original part is unavailable, when alternative packaging formats are acceptable, or when sourcing from different manufacturers is necessary to meet supply chain requirements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1.9	A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	V
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Mounting Type	Through Hole	—
Package / Case	SOD-57, Axial	—
Operating Temperature - Junction	-55°C ~ 175°C	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the BYT53A-TR is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50V
Current - Average Rectified (Io): Must equal or exceed 1.9A
Reverse Recovery Time (trr): Must equal or be faster than 50ns
Current - Reverse Leakage @ Vr: Must not exceed 5µA @ 50V
Speed Classification: Must support Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Compatibility Criteria:

Mounting Type: Through Hole required
Package Format: Axial configuration acceptable

The EGP20A from Fairchild Semiconductor meets all electrical parameters with equivalent or superior ratings and maintains through-hole axial mounting compatibility, though in a different package case format (DO-15 versus SOD-57).

Parameter Comparison

Parameter	BYT53A-TR (Vishay)	EGP20A (Fairchild)	Match Status
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	Equal
Current - Average Rectified (Io)	1.9 A	2 A	Substitute Exceeds
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	950 mV @ 2 A	Substitute Superior
Reverse Recovery Time (trr)	50 ns	50 ns	Equal
Current - Reverse Leakage @ Vr	5 µA @ 50 V	5 µA @ 50 V	Equal
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Equal
Mounting Type	Through Hole	Through Hole	Equal
Package / Case	SOD-57, Axial	DO-204AC, DO-15, Axial	Different Format
Operating Temperature - Junction	-55°C ~ 175°C	-65°C ~ 150°C	Substitute Lower Max
RoHS Status	ROHS3 Compliant	Not Specified	Original Certified

Engineering Selection Recommendations

The EGP20A is electrically qualified as a substitute for the BYT53A-TR based on equivalent or superior performance across all critical electrical parameters: reverse voltage rating, average rectified current capacity, reverse recovery time, and reverse leakage current. Both components maintain fast recovery speed classification and through-hole axial mounting configuration.

The primary consideration for substitution is the package case format difference: the BYT53A-TR uses SOD-57 packaging while the EGP20A uses DO-15 (DO-204AC) packaging. Both are axial through-hole formats and are mechanically compatible with standard PCB layouts designed for axial diodes, though physical dimensions differ.

The BYT53A-TR maintains RoHS3 compliance certification. The EGP20A RoHS status is not specified in the provided data. The BYT53A-TR supports a higher maximum junction temperature (175°C versus 150°C), which may be relevant for high-temperature applications.

Selection between these parts should be based on PCB layout constraints, thermal environment requirements, and compliance documentation availability for the specific application.

Frequently Asked Questions (FAQ)

Q: Can the EGP20A directly replace the BYT53A-TR in an existing circuit?

A: Electrical substitution is valid. The EGP20A meets or exceeds all electrical specifications of the BYT53A-TR. However, physical package dimensions differ between SOD-57 and DO-15 formats. PCB layout modifications may be required to accommodate the different package case, though both are axial through-hole configurations.

Q: What are the key electrical parameters that determine substitution eligibility?

A: The critical parameters are: Voltage - DC Reverse (Vr) (Max) of 50V, Current - Average Rectified (Io) of at least 1.9A, Reverse Recovery Time (trr) of 50ns or faster, Current - Reverse Leakage @ Vr of 5µA or less, and Fast Recovery speed classification. The EGP20A meets all these requirements.

Q: Are there differences in forward voltage characteristics?

A: Yes. The BYT53A-TR specifies 1.1V maximum forward voltage at 1A, while the EGP20A specifies 950mV maximum forward voltage at 2A. The EGP20A exhibits lower forward voltage drop, which may reduce power dissipation in the application.

Q: Does the operating temperature range affect substitution?

A: The BYT53A-TR supports -55°C to 175°C junction temperature, while the EGP20A supports -65°C to 150°C. For applications requiring operation above 150°C, the BYT53A-TR is required. For standard temperature ranges, both are suitable.

Q: What is the difference between SOD-57 and DO-15 packages?

A: Both are axial through-hole diode packages with different physical dimensions and lead spacing. SOD-57 and DO-15 are not pin-compatible without PCB layout modification. Verify PCB footprint compatibility before substitution.

Q: Is RoHS compliance maintained with the EGP20A substitute?

A: The BYT53A-TR is RoHS3 compliant. The EGP20A RoHS status is not specified in the available data. Compliance verification with the component supplier is required if RoHS certification is mandatory for the application.

Q: Are both parts classified as fast recovery diodes?

A: Yes. Both the BYT53A-TR and EGP20A meet the Fast Recovery classification with reverse recovery time of 50ns and support switching speeds ≤ 500ns for currents exceeding 200mA.

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