BZX55F2V4-TAP Equivalent & Substitute Parts

Part Overview

The BZX55F2V4-TAP is a Zener diode rated at 2.4 V nominal with 500 mW power dissipation in a DO-35 through-hole package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts are necessary for ongoing design support, production continuity, and system maintenance. Substitute components must maintain electrical compatibility across voltage regulation, power handling, and thermal operating ranges while accommodating packaging and qualification requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	2.4	V
Tolerance	±1%	-
Power - Max	500	mW
Impedance (Max)	85	Ohms
Current - Reverse Leakage @ Vr	50	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	-

Substitute Part Grouping Explanation

Substitution of the BZX55F2V4-TAP is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - Zener (Nom): 2.4 V
Power - Max: 500 mW
Mounting Type: Through Hole
Package / Case: DO-35 or DO-204AH equivalent

Tolerance and Performance Considerations:

Tolerance range: ±1% to ±5% acceptable for voltage regulation applications
Impedance (Max): 85 Ohms or lower
Current - Reverse Leakage @ Vr: 50 µA to 100 µA @ 1 V
Voltage - Forward (Vf) (Max) @ If: 1.1 V to 1.5 V @ 200 mA

Qualification and Compliance:

Grade: Automotive or Military
Qualification: AEC-Q101 or MIL-PRF-19500/127
RoHS Status: ROHS3 Compliant or RoHS non-compliant (application-dependent)

Substitute parts must maintain the 2.4 V nominal zener voltage, 500 mW power rating, and through-hole DO-35 package configuration. Variations in tolerance, impedance, and leakage current are acceptable within the specified ranges for equivalent functionality.

Parameter Comparison

Parameter	BZX55F2V4-TAP	BZX55B2V4-TAP	1N5985B	JAN1N4370C-1
Manufacturer	Vishay	Vishay	Microchip	Microchip
Voltage - Zener (Nom)	2.4 V	2.4 V	2.4 V	2.4 V
Tolerance	±1%	±2%	±5%	±2%
Power - Max	500 mW	500 mW	500 mW	Not specified
Impedance (Max)	85 Ohms	85 Ohms	100 Ohms	30 Ohms
Current - Reverse Leakage @ Vr	50 µA @ 1 V	50 µA @ 1 V	100 µA @ 1 V	100 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
Operating Temperature	175°C	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C
Grade	Automotive	Automotive	Not specified	Military
Qualification	AEC-Q101	AEC-Q101	Not specified	MIL-PRF-19500/127
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant

Engineering Selection Recommendations

BZX55B2V4-TAP (Vishay) is the primary direct substitute for the BZX55F2V4-TAP. Both components are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications with the exception of tolerance (±2% versus ±1%) and operating temperature range (-65°C ~ 175°C versus 175°C maximum). The BZX55B2V4-TAP maintains AEC-Q101 automotive qualification and ROHS3 compliance. This component is currently in active production with substantial inventory availability (30,860 pcs), making it the preferred choice for direct replacement in automotive applications.

1N5985B (Microchip) is an active substitute suitable for applications where tolerance relaxation to ±5% is acceptable. This component maintains the 2.4 V nominal voltage and 500 mW power rating with through-hole DO-35 packaging. The 1N5985B exhibits higher impedance (100 Ohms versus 85 Ohms) and increased reverse leakage current (100 µA versus 50 µA @ 1 V). This component is not RoHS compliant and lacks automotive qualification. Use is limited to non-automotive applications or legacy system support where RoHS compliance is not required.

JAN1N4370C-1 (Microchip) is an active substitute for applications requiring military-grade qualification per MIL-PRF-19500/127. This component maintains 2.4 V nominal voltage with ±2% tolerance and superior impedance characteristics (30 Ohms). The JAN1N4370C-1 does not specify maximum power rating and is not RoHS compliant. This component is suitable for military and aerospace applications where MIL-PRF qualification is mandatory.

For automotive applications requiring direct replacement, BZX55B2V4-TAP is the recommended substitute. For non-automotive legacy support, 1N5985B provides functional equivalence. For military applications, JAN1N4370C-1 meets qualification requirements.

Frequently Asked Questions (FAQ)

Q: Can BZX55B2V4-TAP directly replace BZX55F2V4-TAP in automotive circuits?

A: Yes. Both components share identical electrical specifications for voltage (2.4 V), power (500 mW), impedance (85 Ohms), and reverse leakage current (50 µA @ 1 V). The BZX55B2V4-TAP provides extended operating temperature range (-65°C ~ 175°C) and maintains AEC-Q101 automotive qualification. The tolerance difference (±2% versus ±1%) is acceptable for voltage regulation applications.

Q: What is the impact of ±5% tolerance in the 1N5985B substitute?

A: The 1N5985B tolerance of ±5% results in a zener voltage range of 2.28 V to 2.52 V compared to the original ±1% range of 2.376 V to 2.424 V. This wider tolerance band may affect voltage regulation precision in circuits with tight voltage specifications. The 1N5985B is suitable for applications where voltage regulation tolerance of ±5% is acceptable.

Q: Are all substitute parts available in the same DO-35 package?

A: Yes. All substitute parts (BZX55B2V4-TAP, 1N5985B, and JAN1N4370C-1) are available in DO-204AH (DO-35) through-hole axial packages, ensuring mechanical and electrical compatibility with existing PCB layouts and socket configurations.

Q: What are the compliance differences between substitute options?

A: BZX55B2V4-TAP is ROHS3 compliant with AEC-Q101 automotive qualification. 1N5985B and JAN1N4370C-1 are RoHS non-compliant. JAN1N4370C-1 carries MIL-PRF-19500/127 military qualification. Component selection must align with application compliance requirements.

Q: How do impedance variations affect circuit performance?

A: Impedance affects dynamic resistance and voltage regulation stability. The BZX55B2V4-TAP and BZX55F2V4-TAP both specify 85 Ohms maximum impedance. The 1N5985B specifies 100 Ohms, resulting in slightly higher dynamic resistance. The JAN1N4370C-1 specifies 30 Ohms, providing superior regulation characteristics. Impedance differences are acceptable for standard voltage regulation applications but may require circuit analysis for precision regulation circuits.

Q: What is the significance of reverse leakage current differences?

A: The BZX55F2V4-TAP and BZX55B2V4-TAP specify 50 µA reverse leakage @ 1 V. The 1N5985B and JAN1N4370C-1 specify 100 µA @ 1 V. Higher leakage current increases standby power consumption and may affect low-power circuit performance. For applications sensitive to leakage current, the Vishay components are preferred.

Q: Can JAN1N4370C-1 be used in automotive applications?

A: The JAN1N4370C-1 carries military qualification (MIL-PRF-19500/127) but does not carry automotive qualification (AEC-Q101). Use in automotive applications requires verification that military qualification meets automotive reliability and qualification requirements for the specific application.

Q: What inventory considerations apply to substitute selection?

A: BZX55B2V4-TAP has substantial inventory (30,860 pcs), ensuring supply continuity. 1N5985B and JAN1N4370C-1 each have approximately 1,100 pcs available. For high-volume production, BZX55B2V4-TAP is the preferred choice due to inventory availability and active production status.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message