BZX55F3V0-TAP Equivalent & Substitute Parts

Part Overview

The BZX55F3V0-TAP is a 3 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 ongoing design requirements and procurement needs. The BZX55F3V0-TAP features ±1% voltage tolerance, automotive-grade qualification (AEC-Q101), and ROHS3 compliance, making it suitable for regulated voltage reference applications in automotive and industrial circuits.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	3	V
Tolerance	±1%	—
Power - Max	500	mW
Impedance (Max)	85	Ohms
Current - Reverse Leakage @ Vr	4	µA @ 1 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	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the BZX55F3V0-TAP is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 3 V nominal
Power dissipation: 500 mW maximum
Package type: DO-35 (DO-204AH) through-hole axial configuration
Mounting type: Through-hole

Secondary Compatibility Factors:

Voltage tolerance (±1%, ±2%, ±5%)
Impedance characteristics
Reverse leakage current
Forward voltage drop
Operating temperature range
Regulatory compliance (RoHS, REACH)
Grade classification (Automotive, Military)

Substitute parts are grouped into two categories: direct equivalents with matching tolerance specifications and functional alternatives with relaxed tolerance but identical electrical performance in the primary application parameters.

Parameter Comparison

Parameter	BZX55F3V0-TAP	BZX55B3V0-TAP	1N4619-1	1N5225B TR PBFREE	1N5987B	JANTXV1N4372D-1
Manufacturer	Vishay	Vishay	Microchip	Central Semiconductor	Microchip	Microchip
Voltage - Zener (Nom)	3 V	3 V	3 V	3 V	3 V	3 V
Tolerance	±1%	±2%	±5%	±5%	±5%	±1%
Power - Max	500 mW	500 mW	500 mW	500 mW	500 mW	500 mW
Impedance (Max)	85 Ω	85 Ω	1600 Ω	29 Ω	95 Ω	29 Ω
Current - Reverse Leakage @ Vr	4 µA @ 1 V	4 µA @ 1 V	400 nA @ 1 V	50 µA @ 1 V	50 µA @ 1 V	30 µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.5 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA
Operating Temperature	175°C	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 200°C	-65°C ~ 175°C	-65°C ~ 175°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AH, DO-35	DO-204AH, DO-35	DO-204AH, DO-35	DO-204AH, DO-35	DO-204AH, DO-35	DO-204AH, DO-35
Product Status	Obsolete	Active	Active	Active	Active	Active
Grade	Automotive	Automotive	—	—	—	Military
Qualification	AEC-Q101	AEC-Q101	—	—	—	MIL-PRF-19500/435
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant

Engineering Selection Recommendations

Primary Recommendation: BZX55B3V0-TAP

The BZX55B3V0-TAP is the preferred direct substitute for the obsolete BZX55F3V0-TAP. Both components are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications with the exception of voltage tolerance (±2% versus ±1%). The BZX55B3V0-TAP maintains automotive-grade qualification (AEC-Q101), ROHS3 compliance, and identical impedance and leakage characteristics. The part is in active production status with substantial inventory availability (29,433 units). The extended operating temperature range (-65°C to 175°C) provides superior thermal performance compared to the original part specification.

Secondary Recommendation: JANTXV1N4372D-1

The JANTXV1N4372D-1 is suitable for applications requiring military-grade qualification (MIL-PRF-19500/435) with ±1% voltage tolerance matching the original specification. This Microchip Technology component maintains identical 3 V nominal voltage and 500 mW power rating in DO-35 packaging. The impedance specification (29 Ohms) differs from the original (85 Ohms), requiring circuit-level evaluation for applications sensitive to dynamic impedance characteristics. This part is active in production with 953 units available.

Functional Alternative: 1N5225B TR PBFREE

The 1N5225B TR PBFREE from Central Semiconductor Corp provides functional equivalence with ±5% voltage tolerance and extended operating temperature range (-65°C to 200°C). ROHS3 compliance and identical 500 mW power rating support environmental and regulatory requirements. The significantly lower impedance (29 Ohms) and higher reverse leakage current (50 µA) require evaluation for precision voltage reference applications. This part is active with 9,954 units in inventory.

Functional Alternative: 1N4619-1

The 1N4619-1 from Microchip Technology offers 3 V, 500 mW specifications in DO-35 packaging with ±5% tolerance. The substantially higher impedance (1600 Ohms) and lower reverse leakage current (400 nA) present different dynamic characteristics. RoHS non-compliance and lack of automotive qualification limit applicability to legacy or non-regulated designs. This part is active with 1,223 units available.

Functional Alternative: 1N5987B

The 1N5987B from Microchip Technology provides 3 V, 500 mW operation with ±5% tolerance and impedance of 95 Ohms closely matching the original specification. RoHS non-compliance and absence of automotive or military qualification restrict use to non-regulated applications. This part is active with 1,085 units in inventory.

Frequently Asked Questions (FAQ)

Q: Can BZX55B3V0-TAP directly replace BZX55F3V0-TAP in automotive applications?

A: Yes. The BZX55B3V0-TAP is a direct substitute maintaining automotive-grade qualification (AEC-Q101), ROHS3 compliance, and identical electrical performance. The ±2% tolerance specification is tighter than the ±1% original specification, providing equivalent or superior performance. Both components are manufactured by Vishay in identical DO-35 packaging.

Q: What is the significance of the impedance differences between substitute parts?

A: Impedance (Zzt) affects the dynamic response of the Zener diode under transient conditions. The original BZX55F3V0-TAP specifies 85 Ohms maximum impedance. Substitute parts with significantly different impedance values (such as 1N4619-1 at 1600 Ohms or 1N5225B TR PBFREE at 29 Ohms) exhibit different voltage regulation characteristics under load changes. Applications requiring precise transient response must evaluate impedance specifications.

Q: Are RoHS non-compliant parts acceptable substitutes?

A: RoHS compliance is a regulatory requirement dependent on application and market jurisdiction. The BZX55F3V0-TAP is ROHS3 compliant. Substitute parts such as 1N4619-1, 1N5987B, and JANTXV1N4372D-1 are RoHS non-compliant and are suitable only for applications where RoHS compliance is not mandated. For automotive and consumer electronics applications, ROHS3-compliant alternatives (BZX55B3V0-TAP or 1N5225B TR PBFREE) are required.

Q: What is the difference between automotive-grade and military-grade Zener diodes?

A: Automotive-grade components (AEC-Q101 qualified) meet automotive industry reliability and environmental standards. Military-grade components (MIL-PRF-19500/435 qualified) meet more stringent military specifications including extended temperature ranges and reliability testing. The JANTXV1N4372D-1 is military-grade qualified, while the BZX55B3V0-TAP is automotive-grade qualified. Military-grade parts are suitable for automotive applications but represent higher cost and longer lead times.

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

A: Tolerance substitution depends on circuit design requirements. Applications requiring precise voltage reference (such as analog-to-digital converter reference inputs) may not tolerate ±5% tolerance. Applications using the Zener diode for general overvoltage protection or basic voltage regulation can typically accommodate ±5% tolerance. Circuit-level analysis is required to determine tolerance compatibility.

Q: What is the impact of reverse leakage current differences on circuit performance?

A: Reverse leakage current affects standby power consumption and voltage regulation stability. The original BZX55F3V0-TAP specifies 4 µA at 1 V. Substitute parts range from 400 nA (1N4619-1) to 50 µA (1N5225B TR PBFREE and 1N5987B). Higher leakage current increases standby power dissipation and reduces voltage regulation precision. Applications with strict power budget requirements should prioritize lower leakage specifications.

Q: Are all substitute parts available in identical packaging?

A: Yes. All substitute parts listed are available in DO-35 (DO-204AH) through-hole axial packaging, matching the original BZX55F3V0-TAP package configuration. Packaging compatibility ensures direct mechanical and electrical substitution without circuit board modifications.

Q: What is the operating temperature range significance?

A: The original BZX55F3V0-TAP specifies a maximum operating temperature of 175°C. The BZX55B3V0-TAP extends this to -65°C to 175°C, providing superior low-temperature performance. The 1N5225B TR PBFREE extends to -65°C to 200°C, offering the widest temperature range. Applications operating in extreme temperature environments should select parts with appropriate temperature specifications.

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