BYT01-400 Equivalent & Substitute Parts

Part Overview

The BYT01-400 is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 400 V DC reverse voltage and 1 A average rectified current in a DO-15 (DO-204AC) axial through-hole package. This component is classified as obsolete product status. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and legacy system support.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 1 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	55	ns
Current - Reverse Leakage @ Vr	20	µA @ 400 V
Mounting Type	Through Hole	—
Package / Case	DO-204AC, DO-15, Axial	—
Operating Temperature - Junction	-40 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the BYT01-400 are selected based on strict electrical and mechanical compatibility criteria. The following parameters must match or exceed the original specification:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 1 A minimum
Mounting Type: Through Hole
Package compatibility: DO-15 (DO-204AC) or DO-41 (DO-204AL) axial packages

Acceptable Variation Parameters:

Voltage - Forward (Vf): May be lower than 1.5 V (improved performance)
Reverse Recovery Time (trr): May be lower than 55 ns (improved performance)
Current - Reverse Leakage: May be lower than 20 µA (improved performance)
Operating Temperature Range: May exceed -40°C to 150°C (extended capability)

Substitute parts are grouped into two categories: Package-Compatible Substitutes (same DO-15 package) and Functionally Equivalent Substitutes (same electrical ratings in alternative DO-41 package with superior performance characteristics).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Status
BYT01-400	STMicroelectronics	400	1	1.5 @ 1 A	Fast Recovery ≤ 500ns	55	20 @ 400 V	DO-15	-40 to 150	Obsolete
1N4004-E3/53	Vishay	400	1	1.1 @ 1 A	Standard Recovery >500ns	—	5 @ 400 V	DO-41	-50 to 150	Active
1N4004-E3/73	Vishay	400	1	1.1 @ 1 A	Standard Recovery >500ns	—	5 @ 400 V	DO-41	-55 to 150	Active
1N4004E-E3/53	Vishay	400	1	1.1 @ 1 A	Standard Recovery >500ns	—	5 @ 400 V	DO-41	-50 to 150	Active
1N4246GP-E3/54	Vishay	400	1	1.2 @ 1 A	Standard Recovery >500ns	—	1 @ 400 V	DO-41	-65 to 160	Active
1N4246GP-E3/73	Vishay	400	1	1.2 @ 1 A	Standard Recovery >500ns	—	1 @ 400 V	DO-41	-65 to 160	Active
1N5395G B0G	Taiwan Semiconductor	400	1.5	1 @ 1.5 A	Standard Recovery >500ns	—	5 @ 400 V	DO-15	-55 to 150	Active
1N5395GHA0G	Taiwan Semiconductor	400	1.5	1 @ 1.5 A	Standard Recovery >500ns	—	5 @ 400 V	DO-15	-55 to 150	Active
EGP10G	Fairchild Semiconductor	400	1	1.25 @ 1 A	Fast Recovery ≤ 500ns	50	5 @ 400 V	DO-41	-65 to 150	Active
EGP10G-E3/54	Vishay	400	1	1.25 @ 1 A	Fast Recovery ≤ 500ns	50	5 @ 400 V	DO-41	-65 to 150	Active
EGP10G-E3/73	Vishay	400	1	1.25 @ 1 A	Fast Recovery ≤ 500ns	50	5 @ 400 V	DO-41	-65 to 150	Active

Engineering Selection Recommendations

Direct Package Substitutes (DO-15 Axial):

The 1N5395G B0G and 1N5395GHA0G from Taiwan Semiconductor Corporation are direct mechanical and electrical substitutes for the BYT01-400. Both parts maintain the DO-15 (DO-204AC) axial package format and meet the 400 V, 1 A electrical requirements. These parts are active product status with ROHS3 compliance and unlimited moisture sensitivity level. The 1N5395GHA0G variant includes AEC-Q101 automotive qualification, providing additional reliability assurance for applications requiring automotive-grade components.

Functionally Equivalent Substitutes (DO-41 Axial):

The 1N4004 series (1N4004-E3/53, 1N4004-E3/73, 1N4004E-E3/53) from Vishay provides electrical equivalence with improved reverse leakage characteristics (5 µA versus 20 µA). These parts use the DO-41 (DO-204AL) package, which is mechanically compatible with through-hole PCB layouts designed for axial components. All variants are active product status with ROHS3 compliance.

The 1N4246GP series (1N4246GP-E3/54, 1N4246GP-E3/73) from Vishay offers superior performance with lower reverse leakage (1 µA), extended operating temperature range (-65°C to 160°C), and SUPERECTIFIER® technology. These parts are active product status with ROHS3 compliance.

Fast Recovery Alternatives:

The EGP10G series (EGP10G, EGP10G-E3/54, EGP10G-E3/73) from Vishay and Fairchild Semiconductor maintains the fast recovery characteristic of the BYT01-400 (≤ 500 ns, 50 ns trr) while providing improved reverse leakage (5 µA). These parts use the DO-41 package and are active product status with ROHS3 compliance.

All substitute parts listed are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8541.10.0080, matching the regulatory classification of the original BYT01-400.

Frequently Asked Questions (FAQ)

Q: Can I use a DO-41 package diode as a substitute for the DO-15 BYT01-400?

A: Yes. Both DO-15 (DO-204AC) and DO-41 (DO-204AL) are axial through-hole packages with identical lead spacing and mounting compatibility on standard PCBs. The physical dimensions differ slightly, but both fit standard 0.3-inch hole spacing on through-hole boards. Verify PCB layout clearances if space is constrained.

Q: What is the difference between the 1N4004 and 1N4246 series?

A: Both series meet the 400 V, 1 A electrical requirements. The 1N4246 series features lower reverse leakage current (1 µA versus 5 µA), extended temperature range (-65°C to 160°C versus -50°C to 150°C), and SUPERECTIFIER® technology. The 1N4004 series is a standard recovery diode suitable for general-purpose applications.

Q: Does the BYT01-400 require a fast recovery diode substitute?

A: The BYT01-400 is specified as fast recovery (≤ 500 ns, 55 ns trr). Substitutes with standard recovery characteristics (>500 ns) will function electrically but may exhibit different switching behavior in high-frequency applications. For applications sensitive to recovery time, select EGP10G series substitutes, which maintain fast recovery specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant and REACH unaffected, matching the regulatory status of the BYT01-400.

Q: What is the significance of the packaging codes (E3/53, E3/54, E3/73)?

A: These codes indicate supplier packaging and tape configuration. E3/53 denotes cut tape (CT) packaging, E3/54 denotes tape and reel (TR) packaging, and E3/73 denotes tape and box (TB) or alternative packaging. The electrical specifications remain identical across packaging variants of the same base part number.

Q: Can I substitute a 1.5 A rated diode for the 1 A BYT01-400?

A: Yes. The 1N5395G B0G and 1N5395GHA0G are rated for 1.5 A average rectified current, exceeding the 1 A requirement. Higher current ratings provide design margin and are electrically compatible. These parts maintain the DO-15 package format and 400 V voltage rating.

Q: What is the difference between standard recovery and fast recovery diodes?

A: Recovery time (trr) affects switching speed. Fast recovery diodes (≤ 500 ns) switch faster, reducing switching losses in high-frequency circuits. Standard recovery diodes (>500 ns) are suitable for lower-frequency applications. The BYT01-400 specifies fast recovery; substitutes with standard recovery will function but may increase switching losses.

Q: Is the 1N5395GHA0G suitable for automotive applications?

A: Yes. The 1N5395GHA0G includes AEC-Q101 automotive qualification and is designated as automotive grade. This variant is appropriate for automotive and harsh-environment applications requiring additional reliability assurance.

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