BZX55F6V2-TAP Equivalent & Substitute Parts

Part Overview

The BZX55F6V2-TAP is a 6.2 V, 500 mW Zener diode manufactured by Vishay General Semiconductor - Diodes Division in a through-hole DO-35 package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. The BZX55F6V2-TAP features ±1% voltage tolerance, automotive-grade qualification (AEC-Q101), and ROHS3 compliance. Substitute parts are selected based on matching nominal Zener voltage, power dissipation rating, package type, and mounting configuration.

Key Parameters

Parameter	BZX55F6V2-TAP
Voltage - Zener (Nom) (Vz)	6.2 V
Tolerance	±1%
Power - Max	500 mW
Impedance (Max) (Zzt)	10 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 2 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA
Operating Temperature	175°C
Mounting Type	Through Hole
Package / Case	DO-204AH, DO-35, Axial
Product Status	Obsolete
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the BZX55F6V2-TAP are selected based on the following critical parameters:

Primary Matching Criteria:

Nominal Zener voltage: 6.2 V
Maximum power dissipation: 500 mW
Package type: DO-35 (DO-204AH), through-hole, axial configuration
Mounting type: Through Hole

Secondary Compatibility Factors:

Voltage tolerance (±1%, ±2%, ±5%, ±10%)
Operating temperature range
Impedance characteristics
Reverse leakage current specifications
Forward voltage characteristics
Compliance certifications (AEC-Q101, ROHS3)
Product status (Active vs. Obsolete)

Substitutes are grouped into categories based on voltage tolerance and compliance status. Parts with tighter tolerance specifications (±1%, ±2%) provide closer electrical performance to the original BZX55F6V2-TAP. Parts with looser tolerances (±5%, ±10%) are suitable for applications with less stringent voltage regulation requirements.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Vf (Max) @ If	Temp Range	Status	RoHS	AEC-Q101
BZX55F6V2-TAP	Vishay	6.2 V	±1%	500 mW	10 Ω	1.5 V @ 200 mA	to 175°C	Obsolete	ROHS3	Yes
BZX55B6V2-TAP	Vishay	6.2 V	±2%	500 mW	10 Ω	1.5 V @ 200 mA	-65°C ~ 175°C	Active	ROHS3	Yes
1N5731C	Microchip Technology	6.2 V	±1%	500 mW	10 Ω	900 mV @ 10 mA	-65°C ~ 175°C	Active	Non-compliant	No
1N4691	Microchip Technology	6.2 V	±5%	500 mW	—	1.1 V @ 200 mA	-65°C ~ 175°C	Active	Non-compliant	No
1N5234A	Microchip Technology	6.2 V	±10%	500 mW	7 Ω	1.5 V @ 200 mA	-65°C ~ 175°C	Active	Non-compliant	No
1N5234B BK PBFREE	Central Semiconductor Corp	6.2 V	±5%	500 mW	7 Ω	1.1 V @ 200 mA	-65°C ~ 200°C	Active	ROHS3	No
1N5234BTR	Fairchild Semiconductor	6.2 V	±5%	500 mW	7 Ω	1.2 V @ 200 mA	-65°C ~ 200°C	Active	—	No
1N5995B	Microchip Technology	6.2 V	±5%	500 mW	10 Ω	1.1 V @ 200 mA	-65°C ~ 175°C	Active	Non-compliant	No
1N5995D	Microchip Technology	6.2 V	±1%	500 mW	10 Ω	1.1 V @ 200 mA	-65°C ~ 175°C	Active	Non-compliant	No
1N753A TR PBFREE	Central Semiconductor Corp	6.2 V	±5%	500 mW	7 Ω	1.5 V @ 200 mA	-65°C ~ 200°C	Active	ROHS3	No
1N753A-1	Microchip Technology	6.2 V	±5%	500 mW	3 Ω	1.1 V @ 200 mA	-65°C ~ 175°C	Active	Non-compliant	No

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Preferred):

BZX55B6V2-TAP is the primary substitute for BZX55F6V2-TAP. Both parts are manufactured by Vishay, share identical electrical specifications except for voltage tolerance (±2% vs. ±1%), maintain the same 500 mW power rating, and are AEC-Q101 qualified with ROHS3 compliance. The BZX55B6V2-TAP is active in production with expanded operating temperature range (-65°C to 175°C) and higher inventory availability (15,823 units).

Tier 2 - Equivalent Performance (Tight Tolerance):

1N5731C and 1N5995D both provide ±1% voltage tolerance matching the original BZX55F6V2-TAP specification. Both are active products with 500 mW power rating and DO-35 packaging. However, neither part carries AEC-Q101 qualification or ROHS3 compliance. 1N5731C is manufactured by Microchip Technology with 895 units in stock. 1N5995D is also from Microchip with 1,054 units available.

Tier 3 - Functional Equivalents (Moderate Tolerance):

1N4691, 1N5995B, 1N5234B BK PBFREE, 1N5234BTR, and 1N753A TR PBFREE all provide ±5% voltage tolerance with 500 mW power dissipation and DO-35 packaging. These parts are suitable for applications where voltage regulation tolerance is less critical. 1N753A TR PBFREE and 1N5234B BK PBFREE offer ROHS3 compliance. 1N753A TR PBFREE provides the highest inventory (11,006 units) and extended operating temperature to 200°C.

Tier 4 - Loose Tolerance Alternative:

1N5234A provides ±10% voltage tolerance with 500 mW power rating and is active in production. This part is suitable only for applications with relaxed voltage regulation requirements.

Compliance Considerations:

For automotive applications requiring AEC-Q101 qualification, BZX55B6V2-TAP is the only active substitute. For applications requiring ROHS3 compliance without AEC-Q101 requirement, 1N753A TR PBFREE and 1N5234B BK PBFREE are available options.

Frequently Asked Questions (FAQ)

Q: Can BZX55B6V2-TAP directly replace BZX55F6V2-TAP?

A: Yes. BZX55B6V2-TAP is a direct substitute from the same manufacturer with identical electrical performance except for voltage tolerance specification (±2% vs. ±1%). Both parts share the same 6.2 V nominal voltage, 500 mW power rating, DO-35 package, AEC-Q101 qualification, and ROHS3 compliance. The BZX55B6V2-TAP is active in production.

Q: What is the difference between ±1% and ±2% voltage tolerance?

A: Voltage tolerance defines the acceptable deviation from the nominal 6.2 V specification. A ±1% tolerance allows deviation of ±0.062 V (acceptable range: 6.138 V to 6.262 V). A ±2% tolerance allows deviation of ±0.124 V (acceptable range: 6.076 V to 6.324 V). Applications requiring precise voltage regulation should use ±1% parts. Applications with less stringent requirements can use ±2% or ±5% parts.

Q: Are there active substitutes with AEC-Q101 qualification?

A: BZX55B6V2-TAP is the only active substitute with AEC-Q101 automotive qualification. All other listed substitutes lack this certification. For automotive applications requiring AEC-Q101 compliance, BZX55B6V2-TAP is the required choice.

Q: What is the significance of ROHS3 compliance?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. BZX55F6V2-TAP, BZX55B6V2-TAP, 1N753A TR PBFREE, and 1N5234B BK PBFREE are ROHS3 compliant. Other substitutes are RoHS non-compliant or have unspecified status.

Q: Can I use a ±5% tolerance part instead of ±1%?

A: Substitution depends on circuit requirements. If the application circuit design accounts for ±5% voltage variation without performance degradation, a ±5% part is acceptable. If the circuit requires tighter voltage regulation, only ±1% or ±2% parts should be used. Review circuit specifications and tolerance stack-up analysis before substitution.

Q: What is the difference between DO-35 and DO-204AH package designations?

A: DO-35 and DO-204AH refer to the same physical package. DO-35 is the legacy designation, while DO-204AH is the standardized JEDEC designation. All listed substitutes use this identical through-hole axial package with compatible pinout and mechanical dimensions.

Q: Why is the BZX55F6V2-TAP marked as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Vishay. The BZX55B6V2-TAP serves as the active replacement from the same manufacturer, offering equivalent performance with improved availability and extended operating temperature range.

Q: What is the operating temperature range significance?

A: BZX55F6V2-TAP operates to 175°C maximum. BZX55B6V2-TAP extends this to -65°C to 175°C, providing wider temperature range capability. Some substitutes (1N5234B BK PBFREE, 1N5234BTR, 1N753A TR PBFREE) operate to 200°C maximum. Application thermal requirements determine whether extended temperature range is necessary.

Q: Are there packaging format differences among substitutes?

A: BZX55B6V2-TAP is supplied in Cut Tape (CT) format. 1N753A TR PBFREE is also supplied in Cut Tape. Most other substitutes are supplied in Bulk format. Packaging format affects handling and assembly processes but does not affect electrical performance or physical compatibility.

Q: Which substitute has the lowest reverse leakage current?

A: 1N753A TR PBFREE and BZX55F6V2-TAP both specify 100 nA reverse leakage current. 1N5995B and 1N5995D specify 1 µA. Other substitutes specify higher leakage currents (3 µA to 10 µA). Lower reverse leakage is beneficial for precision voltage regulation applications.

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