BYM36B-TAP Equivalent & Substitute Parts

Part Overview

The BYM36B-TAP is a 400 V, 3 A avalanche diode manufactured by Vishay General Semiconductor - Diodes Division in SOD-64 axial through-hole packaging. This component is classified as Active and is RoHS3 compliant. Substitute parts are necessary when the BYM36B-TAP is unavailable, when alternative packaging formats are required for assembly compatibility, or when sourcing from multiple manufacturers is required for supply chain resilience.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	1.6 V @ 3 A
Reverse Recovery Time (trr)	100 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 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 BYM36B-TAP is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 3 A minimum
Current - Reverse Leakage @ Vr: 5 µA @ 400 V maximum
Operating Temperature - Junction: Must encompass or exceed -55°C ~ 175°C range

Mechanical Compatibility Requirements:

Mounting Type: Through Hole (required)
Package / Case: Axial configuration (required for form factor compatibility)

Compliance Requirements:

RoHS3 Compliant (mandatory)
REACH Unaffected (mandatory)

Substitute parts meeting these criteria are functionally equivalent for circuit applications requiring 400 V, 3 A rectification. Variations in forward voltage, recovery time, and packaging format (SOD-64 vs. DO-27 vs. DO-201AD) do not preclude substitution when electrical ratings and mounting type are satisfied.

Parameter Comparison

Parameter	BYM36B-TAP (Main)	1N5404-G	1N5404G	1N5404RLG	EGP30G
Manufacturer	Vishay	Comchip Technology	onsemi	onsemi	onsemi
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.6 V @ 3 A	950 mV @ 3 A	1 V @ 3 A	1 V @ 3 A	1.25 V @ 3 A
Reverse Recovery Time (trr)	100 ns	Not specified	Not specified	Not specified	50 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V	10 µA @ 400 V	10 µA @ 400 V	5 µA @ 400 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	SOD-64, Axial	DO-201AD, Axial	DO-201AA, DO-27, Axial	DO-201AA, DO-27, Axial	DO-201AD, Axial
Operating Temperature - Junction	-55°C ~ 175°C	-65°C ~ 125°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Technology	Avalanche	Standard	Standard	Standard	Standard
Product Status	Active	Active	Not For New Designs	Not For New Designs	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute (Recommended for New Designs):

The 1N5404-G (Comchip Technology) is the preferred substitute for the BYM36B-TAP. This part maintains identical electrical ratings (400 V, 3 A) and reverse leakage current (5 µA @ 400 V). The 1N5404-G is classified as Active and is available in high inventory (208,868 pcs). The forward voltage is lower (950 mV @ 3 A vs. 1.6 V @ 3 A), resulting in reduced power dissipation. The operating temperature range (-65°C ~ 125°C) is narrower than the BYM36B-TAP but remains suitable for most industrial applications. Packaging is DO-201AD axial, compatible with through-hole assembly.

Secondary Substitutes (Limited to Existing Designs):

The 1N5404G and 1N5404RLG (both onsemi) are electrically equivalent to the 1N5404-G but are classified as "Not For New Designs." These parts are suitable only for replacement in existing applications or when supply constraints require alternative sourcing. Both maintain 400 V, 3 A ratings with 1 V forward voltage @ 3 A and are available in axial through-hole packaging.

The EGP30G (onsemi) is classified as "Not For New Designs" and exhibits a reverse recovery time of 50 ns (faster than the BYM36B-TAP at 100 ns). This part is suitable for applications requiring faster switching characteristics but should not be selected for new designs due to product status.

Temperature Consideration:

The BYM36B-TAP operates to 175°C junction temperature. Substitute parts 1N5404-G, 1N5404G, 1N5404RLG, and EGP30G operate to maximum 125°C or 150°C. Applications requiring operation above 150°C junction temperature cannot use these substitutes.

Frequently Asked Questions (FAQ)

Q: Can the 1N5404-G directly replace the BYM36B-TAP in my circuit?

A: Yes, the 1N5404-G is electrically compatible for 400 V, 3 A rectification applications. Both parts meet the same voltage and current ratings with identical reverse leakage current (5 µA @ 400 V). The primary difference is packaging format (DO-201AD vs. SOD-64) and forward voltage (950 mV vs. 1.6 V). Verify that your PCB layout accommodates the DO-201AD axial package dimensions and that the lower forward voltage does not affect circuit performance.

Q: What is the difference between SOD-64 and DO-201AD packaging?

A: Both are axial through-hole packages suitable for PCB mounting. SOD-64 and DO-201AD differ in physical dimensions and lead spacing. Verify mechanical compatibility with your PCB footprint before substitution. Both packages are standard industry formats for 3 A rectifier diodes.

Q: Why do some substitute parts show "Not For New Designs" status?

A: "Not For New Designs" indicates that the manufacturer has discontinued active development and recommends alternative parts for new circuit designs. These parts remain available for replacement in existing applications but should not be selected for new product development. The 1N5404-G (Active status) is the recommended choice for new designs.

Q: Does the lower forward voltage of the 1N5404-G affect circuit operation?

A: The 1N5404-G exhibits 950 mV forward voltage @ 3 A compared to 1.6 V for the BYM36B-TAP. This 650 mV difference reduces power dissipation in the diode. For most rectification applications, this is beneficial. However, circuits relying on specific forward voltage characteristics (such as precision voltage references) require evaluation to confirm compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts (1N5404-G, 1N5404G, 1N5404RLG, and EGP30G) are RoHS3 compliant and REACH unaffected, matching the compliance status of the BYM36B-TAP.

Q: What is the maximum operating temperature for each substitute?

A: The BYM36B-TAP operates to -55°C ~ 175°C junction temperature. The 1N5404-G operates to -65°C ~ 125°C. The 1N5404G, 1N5404RLG, and EGP30G operate to -65°C ~ 150°C. Applications requiring sustained operation above 150°C junction temperature cannot use these substitutes.

Q: Can I use EGP30G as a substitute?

A: The EGP30G is electrically compatible (400 V, 3 A, 5 µA reverse leakage) and offers faster recovery time (50 ns vs. 100 ns). However, it is classified as "Not For New Designs." Use EGP30G only for replacement in existing applications where the faster recovery characteristic is beneficial or when other substitutes are unavailable.

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