BYT56A-TR Equivalent & Substitute Parts

Part Overview

The BYT56A-TR is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 50 V DC reverse voltage and 3 A average rectified current in a through-hole SOD-64 axial package. This component is classified as Active and is ROHS3 compliant. Substitute parts are identified when equivalent electrical ratings and mechanical compatibility exist within the through-hole diode rectifier category, allowing for design flexibility and supply chain alternatives.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	1.4 V @ 3 A
Reverse Recovery Time (trr)	100 ns
Current - Reverse Leakage @ Vr	5 µA @ 50 V
Mounting Type	Through Hole
Package / Case	SOD-64, Axial
Operating Temperature - Junction	-55°C ~ 175°C
Technology	Avalanche
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the BYT56A-TR is determined by matching the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io): 3 A minimum
Mounting Type: Through Hole
Package Category: Axial configuration

Compliance Criteria:

RoHS3 Compliant status
REACH Unaffected status
Product Status consideration for new designs

The substitute parts 1N5400G and 1N5400RLG meet the core electrical requirements of 50 V reverse voltage and 3 A average rectified current in through-hole axial packages. Both are ROHS3 compliant and REACH unaffected. Differences in forward voltage, recovery speed, and operating temperature ranges are noted but do not preclude substitution when application requirements permit.

Parameter Comparison

Parameter	BYT56A-TR	1N5400G	1N5400RLG
Manufacturer	Vishay General Semiconductor - Diodes Division	Taiwan Semiconductor Corporation	onsemi
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V
Current - Average Rectified (Io)	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.4 V @ 3 A	1.1 V @ 3 A	1 V @ 3 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Standard Recovery >500ns, > 200mA	Standard Recovery >500ns, > 200mA
Reverse Recovery Time (trr)	100 ns	Not specified	Not specified
Current - Reverse Leakage @ Vr	5 µA @ 50 V	5 µA @ 50 V	10 µA @ 50 V
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	SOD-64, Axial	DO-201AD, Axial	DO-201AA, DO-27, Axial
Operating Temperature - Junction	-55°C ~ 175°C	-55°C ~ 150°C	-65°C ~ 150°C
Technology	Avalanche	Standard	Standard
Product Status	Active	Active	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

1N5400G Selection: The 1N5400G from Taiwan Semiconductor Corporation is suitable for applications where the BYT56A-TR is unavailable. This part maintains the 50 V / 3 A electrical specification and through-hole axial mounting configuration. The 1N5400G exhibits lower forward voltage (1.1 V vs. 1.4 V) and operates within a -55°C to 150°C junction temperature range. Product status is Active, supporting use in new designs. ROHS3 compliance and REACH unaffected status align with the original part.

1N5400RLG Selection: The 1N5400RLG from onsemi meets the core 50 V / 3 A electrical requirements and through-hole axial package specification. This part carries a "Not For New Designs" product status designation, limiting its application to legacy system support or replacement scenarios. The 1N5400RLG provides the lowest forward voltage (1 V) and extended lower temperature rating (-65°C). ROHS3 compliance and REACH unaffected status are maintained. Higher reverse leakage current (10 µA vs. 5 µA) should be evaluated for low-leakage applications.

Compliance Considerations: All three parts maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity level is 1 (Unlimited) for BYT56A-TR and 1N5400G, supporting standard handling and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the 1N5400G directly replace the BYT56A-TR?

A: The 1N5400G meets the core electrical specifications of 50 V reverse voltage and 3 A average rectified current in a through-hole axial package. Physical package dimensions differ (DO-201AD vs. SOD-64), requiring PCB layout verification. Forward voltage is lower (1.1 V vs. 1.4 V), which may affect circuit performance in applications sensitive to voltage drop. Operating temperature range is reduced to -55°C to 150°C.

Q: What is the difference between avalanche and standard diode technology in these parts?

A: The BYT56A-TR uses avalanche technology with a specified reverse recovery time of 100 ns (fast recovery). The 1N5400G and 1N5400RLG use standard technology with recovery times exceeding 500 ns. Avalanche diodes provide faster switching characteristics; standard diodes are suitable for general-purpose rectification. Selection depends on circuit switching frequency requirements.

Q: Why is the 1N5400RLG marked "Not For New Designs"?

A: The "Not For New Designs" status indicates that onsemi has designated this part for legacy applications only. New circuit designs should prioritize the BYT56A-TR or 1N5400G. The 1N5400RLG remains available for replacement and maintenance of existing systems.

Q: Are there physical package compatibility issues between these parts?

A: Yes. The BYT56A-TR uses SOD-64 package, while 1N5400G uses DO-201AD and 1N5400RLG uses DO-201AA/DO-27. All are through-hole axial configurations, but physical dimensions and lead spacing differ. PCB footprint verification is required before substitution.

Q: What is the impact of different reverse leakage currents?

A: The BYT56A-TR and 1N5400G specify 5 µA reverse leakage at 50 V, while 1N5400RLG specifies 10 µA. In applications requiring minimal leakage current (high-impedance circuits, precision analog), the higher leakage of 1N5400RLG may introduce unacceptable error. Standard rectification applications are typically unaffected by this difference.

Q: Can these parts be used interchangeably in high-temperature applications?

A: No. The BYT56A-TR operates to 175°C junction temperature, while both 1N5400G and 1N5400RLG are limited to 150°C. Applications requiring operation above 150°C must use the BYT56A-TR or identify alternative parts with higher temperature ratings.

Q: What compliance certifications apply to all three parts?

A: All three parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is 1 (Unlimited) for BYT56A-TR and 1N5400G, supporting standard handling without special desiccation requirements. The 1N5400RLG has not applicable MSL designation.

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