BYT54K-TAP Equivalent & Substitute Parts

Part Overview

The BYT54K-TAP is an avalanche diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 800 V DC reverse voltage and 1.25 A average rectified current in a through-hole SOD-57 axial package. This component is classified as Active product status and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts become necessary when the BYT54K-TAP reaches end-of-life status, inventory constraints occur, or alternative packaging formats are required for manufacturing flexibility. The substitute diodes listed maintain electrical compatibility within the specified parameter ranges while offering different packaging options and availability profiles.

Key Parameters

Parameter	BYT54K-TAP Value	Significance for Substitution
Voltage - DC Reverse (Vr) (Max)	800 V	Primary rating determining circuit voltage compatibility
Current - Average Rectified (Io)	1.25 A	Maximum continuous current capacity
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 1 A	Forward conduction characteristics affecting circuit efficiency
Reverse Recovery Time (trr)	100 ns	Switching speed classification for fast recovery applications
Current - Reverse Leakage @ Vr	5 µA @ 800 V	Leakage current at rated voltage
Mounting Type	Through Hole	PCB assembly compatibility
Operating Temperature - Junction	-55°C ~ 175°C	Thermal operating range
Technology	Avalanche	Diode type classification
RoHS Status	ROHS3 Compliant	Environmental and regulatory compliance

Substitute Part Grouping Explanation

Substitution eligibility for the BYT54K-TAP is determined by the following critical parameters:

Voltage Rating Compatibility: Substitute parts must maintain a minimum DC reverse voltage rating of 800 V. Parts rated above 800 V (such as MUR1100ERLG at 1000 V) are acceptable as they provide equal or greater voltage margin.

Current Rating Compatibility: The average rectified current must be sufficient to handle the circuit's maximum current demand. The BYT54K-TAP is rated at 1.25 A; substitute parts rated at 1 A represent a reduction in current capacity and require circuit analysis to confirm adequacy.

Switching Speed Classification: All substitute parts maintain fast recovery characteristics (≤500 ns for currents >200 mA), ensuring compatibility with fast recovery diode applications.

Mounting Type: All substitute parts are through-hole axial components, maintaining PCB assembly compatibility with the original part.

Temperature Range: Substitute parts must support the operating temperature range or provide equivalent thermal performance. The BYT54K-TAP operates from -55°C to 175°C; substitute parts with ranges of -65°C to 175°C or -65°C to 150°C are acceptable depending on circuit requirements.

Regulatory Compliance: All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original part's environmental certifications.

Parameter Comparison

Parameter	BYT54K-TAP	EGP10K	MUR180ERLG	MUR1100ERLG
Manufacturer	Vishay General Semiconductor	Fairchild Semiconductor	onsemi	onsemi
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	800 V	1000 V
Current - Average Rectified (Io)	1.25 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 1 A	1.7 V @ 1 A	1.75 V @ 1 A	1.75 V @ 1 A
Reverse Recovery Time (trr)	100 ns	75 ns	100 ns	100 ns
Current - Reverse Leakage @ Vr	5 µA @ 800 V	5 µA @ 800 V	10 µA @ 800 V	10 µA @ 1000 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	SOD-57, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 175°C	-65°C ~ 150°C	-65°C ~ 175°C	-65°C ~ 175°C
Technology	Avalanche	Standard	Standard	Standard
Product Status	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MUR180ERLG (onsemi) is the primary substitute for the BYT54K-TAP. This part maintains identical voltage and temperature ratings (800 V, -65°C to 175°C), matching reverse recovery time (100 ns), and is classified as Active product status. The part is ROHS3 compliant and available in Cut Tape packaging with 51,100 pieces in stock. The current rating reduction from 1.25 A to 1 A requires verification that circuit maximum current does not exceed 1 A. Forward voltage is slightly elevated at 1.75 V versus 1.5 V, resulting in marginally higher power dissipation.

MUR1100ERLG (onsemi) provides an alternative with elevated voltage rating (1000 V) and extended temperature range matching the original part (-65°C to 175°C). This part is suitable for circuits requiring voltage margin above 800 V. The 1 A current rating and 1.75 V forward voltage apply the same constraints as MUR180ERLG. Product status is Active with 35,100 pieces in stock.

EGP10K (Fairchild Semiconductor) offers voltage and current compatibility (800 V, 1 A) with superior reverse recovery time (75 ns). The operating temperature range is limited to -65°C to 150°C, restricting use in applications requiring operation above 150°C. Forward voltage is 1.7 V. Product status is Active with 28,335 pieces in stock. RoHS compliance status is not specified in the provided data.

MUR180EG (onsemi) is classified as Obsolete product status and is not recommended for new designs despite electrical compatibility. This part is retained in the reference for legacy system maintenance only.

Frequently Asked Questions (FAQ)

Q: Can EGP10K replace BYT54K-TAP in all applications?

A: EGP10K is electrically compatible for voltage and current ratings but has a reduced maximum operating temperature of 150°C compared to the BYT54K-TAP's 175°C. Applications operating above 150°C require MUR180ERLG or MUR1100ERLG. Additionally, RoHS compliance status for EGP10K is not specified in the provided data.

Q: What is the impact of the 1.25 A to 1 A current rating reduction?

A: Substitute parts rated at 1 A have a lower maximum continuous current capacity than the BYT54K-TAP's 1.25 A rating. Circuit analysis must confirm that maximum operating current does not exceed 1 A. If circuit current exceeds 1 A, the BYT54K-TAP must be retained or alternative parts with higher current ratings must be evaluated.

Q: Are package differences between SOD-57 and DO-204AL significant?

A: SOD-57 and DO-204AL (DO-41) are both axial through-hole packages with similar physical dimensions and PCB mounting compatibility. Package differences do not affect electrical performance but may require PCB layout verification for mechanical fit.

Q: Why is MUR180EG listed if it is Obsolete?

A: MUR180EG is included for reference in legacy system maintenance and repair scenarios. For new designs and production, MUR180ERLG (Active status) is the recommended alternative.

Q: How does forward voltage affect circuit performance?

A: The BYT54K-TAP has a forward voltage of 1.5 V at 1 A, while substitute parts range from 1.7 V to 1.75 V. Higher forward voltage increases power dissipation in the diode. For circuits with tight thermal budgets or high current density, this difference may require thermal analysis.

Q: Is MUR1100ERLG suitable for 800 V circuits?

A: Yes. MUR1100ERLG is rated for 1000 V maximum reverse voltage, providing 200 V margin above 800 V circuits. This elevated rating does not degrade performance in 800 V applications and may provide additional design margin for transient overvoltage conditions.

Q: What is the significance of reverse recovery time differences?

A: All substitute parts maintain fast recovery classification (≤500 ns for currents >200 mA). EGP10K has a faster recovery time of 75 ns compared to the BYT54K-TAP's 100 ns, which may reduce switching losses in high-frequency applications. This difference is not a limiting factor for substitution.

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