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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Vishay General Semiconductor - Diodes Division BZX55B7V5-TAP

Name: BZX55B7V5-TAP
Brand: Vishay General Semiconductor - Diodes Division
SKU: BZX55B7V5-TAP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX55B7V5-TAP

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

Package:: DO-204AH, DO-35, Axial

Datasheet:: BZX55B7V5-TAP.pdf

Description:: DIODE ZENER 7.5V 500MW DO204AH

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Product details

Overview

BZX55B7V5-TAP from Vishay Semiconductors is a precision 7.5 V Zener diode in DO-35 package, designed for voltage regulation and reference applications with ±0.15 V tolerance at 5 mA test current, 5 Ω dynamic resistance, and low 0.03 %/K temperature coefficient at 25 °C. It delivers stable clamping in power supply feedback loops and analog reference circuits.

For engineers reviewing the BZX55B7V5-TAP datasheet, BZX55B7V5-TAP pinout, BZX55B7V5-TAP application, or BZX55B7V5-TAP equivalent, key selection criteria include zener voltage accuracy (7.35–7.65 V), low leakage (<0.1 μA at VR), tight dynamic resistance (≤7 Ω), thermal stability (TKVZ = +0.03 %/K), and DO-35 package compatibility with through-hole PCB layouts.

Technical Context

This device operates as a single-element, silicon planar Zener diode optimized for sharp reverse breakdown and high long-term stability. Its 7.5 V nominal zener voltage is specified at 5 mA test current (IZT1) with 1 mA IZT2 for knee characterization, supporting precise voltage referencing under low-power conditions.

The BZX55B7V5-TAP exhibits low noise and very low reverse leakage (<0.1 μA at rated VR), enabling use in sensitive analog circuits. Its temperature coefficient of +0.03 %/K at 25 °C and +0.07 %/K at 150 °C ensures predictable drift across industrial temperature ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	7.35–7.65 V at I_ZT = 5 mA - tight 4% tolerance enables accurate voltage clamping without trimming
Dynamic Resistance (Z_Z)	≤7 Ω at I_ZT = 5 mA - low impedance maintains stable output under varying load currents
Reverse Leakage (I_R)	<0.1 μA at V_R = 5.25 V - minimizes error current in high-impedance reference nodes
Power Dissipation (P_tot)	500 mW at T_L = 25 °C - supports continuous operation in compact through-hole designs
Temperature Coefficient (T_KVZ)	+0.03 %/K at 25 °C - low drift preserves reference accuracy over ambient temperature changes
Junction-to-Ambient R_thJA	300 K/W at l = 4 mm - defines thermal rise per watt for board-level thermal design
Forward Voltage (V_F)	≤1.5 V at I_F = 200 mA - ensures predictable conduction in dual-direction protection schemes

Pinout & Package

DO-35 (DO-204AH) glass axial package, 2.6 mm diameter × 4.8 mm length, cathode identified by band. Approx. weight: 125 mg. UL 94 V-0 molding compound, MSL level 1.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal in forward bias; connected to ground or lower potential in zener mode	Enables standard cathode-up orientation for PCB layout consistency and thermal path definition
Cathode	Current exit terminal in forward bias; connected to regulated node in zener mode	Band-marked end provides unambiguous polarity identification during manual assembly and AOI inspection

Key Features

Feature	Design Value
Very sharp reverse characteristic	Defined knee at I_ZT2 = 1 mA enables clean transition into regulation without soft breakdown
Low reverse current level	<0.1 μA at 70% V_Z reduces loading on high-impedance sources and improves reference stability
Very high stability	Qualified per AEC-Q200 stress tests - supports 10+ year operation in automotive and industrial environments
Low noise	Minimal avalanche noise below 100 kHz - suitable for precision ADC references and sensor signal conditioning

Applications

Power Supply Feedback Loop	Microcontroller Reset Circuit
Use Scenario: Regulates feedback voltage in isolated flyback or buck-boost converters to maintain ±1% output accuracy. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold in TL431-based or discrete op-amp feedback networks. Use Value: Tight 7.35–7.65 V range and low Z_Z (≤7 Ω) minimize loop gain variation and improve transient response.	Use Scenario: Generates clean reset threshold for 3.3 V or 5 V microcontrollers during brown-out detection. IC Role / Device Role / Timing Role: Precision voltage threshold detector in RC-based reset generator or supervisor IC input stage. Use Value: Low leakage (<0.1 μA) prevents capacitor discharge errors; stable TKVZ ensures consistent trip point from -40 to +125 °C.
Analog Sensor Reference	Overvoltage Clamp
Use Scenario: Provides stable excitation voltage for resistive bridge sensors (e.g., strain gauges, RTDs) in data acquisition systems. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference replacing higher-cost shunt regulators in 12-bit+ measurement front-ends. Use Value: 0.03 %/K TC and <7 Ω Z_Z limit reference drift to <±1.5 mV over 0–70 °C, preserving measurement linearity.	Use Scenario: Protects I/O pins of FPGAs, ADCs, or communication transceivers against ESD-induced transients up to ±15 kV. IC Role / Device Role / Timing Role: Fast-acting shunt clamp absorbing surge energy while limiting voltage to ≤8.5 V peak. Use Value: Sharp breakdown and 500 mW P_tot enable reliable clamping without thermal runaway in repetitive surge events.

Power Supply Feedback Loop

Microcontroller Reset Circuit

Use Scenario: Regulates feedback voltage in isolated flyback or buck-boost converters to maintain ±1% output accuracy.

IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold in TL431-based or discrete op-amp feedback networks.

Use Value: Tight 7.35–7.65 V range and low Z_Z (≤7 Ω) minimize loop gain variation and improve transient response.

Use Scenario: Generates clean reset threshold for 3.3 V or 5 V microcontrollers during brown-out detection.

IC Role / Device Role / Timing Role: Precision voltage threshold detector in RC-based reset generator or supervisor IC input stage.

Use Value: Low leakage (<0.1 μA) prevents capacitor discharge errors; stable TKVZ ensures consistent trip point from -40 to +125 °C.

Analog Sensor Reference

Overvoltage Clamp

Use Scenario: Provides stable excitation voltage for resistive bridge sensors (e.g., strain gauges, RTDs) in data acquisition systems.

IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference replacing higher-cost shunt regulators in 12-bit+ measurement front-ends.

Use Value: 0.03 %/K TC and <7 Ω Z_Z limit reference drift to <±1.5 mV over 0–70 °C, preserving measurement linearity.

Use Scenario: Protects I/O pins of FPGAs, ADCs, or communication transceivers against ESD-induced transients up to ±15 kV.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp absorbing surge energy while limiting voltage to ≤8.5 V peak.

Use Value: Sharp breakdown and 500 mW P_tot enable reliable clamping without thermal runaway in repetitive surge events.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode voltage regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4734A-TAP	7.5 V nominal, ±5% tolerance (7.13–7.88 V), 10 Ω Z_Z, +0.05 %/K TC	Looser voltage tolerance and higher dynamic resistance reduce accuracy in precision references	Select when cost sensitivity outweighs regulation accuracy; verify loop stability with higher Z_Z
MMSZ5236B-TP	7.5 V nominal, ±5% tolerance, SOD-123 package, 100 mW P_tot, 15 Ω Z_Z	Surface-mount format and lower power rating limit use in >100 mA regulator feedback paths	Choose for space-constrained PCBs where 100 mW dissipation suffices and reflow compatibility is required

Compared with BZX55B7V5-TAP, the 1N4734A-TAP trades tighter voltage control for broader availability and lower cost, while the MMSZ5236B-TP offers SMT integration at the expense of power handling and regulation precision-making BZX55B7V5-TAP optimal for through-hole, high-stability analog references.

Availability

BZX55B7V5-TAP is available at Aetrix Electronics and suitable for voltage reference design, power supply feedback stabilization, and overvoltage protection circuits requiring stable component supply across automotive, industrial control, and test equipment programs.

Supply support for BZX55B7V5-TAP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, passive elements, and sensors, with emphasis on reliability, precision, and high-volume manufacturability.

The BZX55-Series is part of Vishay's small-signal Zener diode product line, engineered for voltage stabilization in cost-sensitive, high-reliability applications where tight tolerance, low noise, and thermal stability are critical.

FAQ

What is the exact zener voltage tolerance of BZX55B7V5-TAP at 5 mA test current?

The BZX55B7V5-TAP has a guaranteed zener voltage range of 7.35 V to 7.65 V at I_ZT = 5 mA, corresponding to ±0.15 V (±2%) tolerance around the 7.5 V nominal value. This tight specification is confirmed in the "ELECTRICAL CHARACTERISTICS" table on page 3 of Vishay document 85604 Rev. 2.0.

Does BZX55B7V5-TAP support operation at elevated temperatures such as 125 °C ambient?

Yes, BZX55B7V5-TAP is rated for storage from –65 °C to +175 °C and junction temperature up to 175 °C. At 125 °C ambient, derating applies: maximum power dissipation drops to ~250 mW based on R_thJA = 300 K/W. The temperature coefficient remains +0.07 %/K at 150 °C, ensuring predictable behavior in extended-range industrial use.

Can BZX55B7V5-TAP be used as a substitute for BZX55C7V5 in existing designs?

BZX55B7V5-TAP replaces BZX55C7V5 only where tighter voltage tolerance is acceptable: BZX55B7V5-TAP offers ±2% (7.35–7.65 V) vs. BZX55C7V5's ±5.3% (7.0–7.9 V). Both share identical DO-35 package, 500 mW rating, and pinout. No PCB change is needed, but verify circuit margin given the narrower V_Z window and lower Z_Z (≤7 Ω vs. ≤50 Ω).

What is the maximum reverse leakage current for BZX55B7V5-TAP and at what test condition?

The maximum reverse leakage current for BZX55B7V5-TAP is <0.1 μA, measured at V_R = 5.25 V (70% of nominal V_Z). This value is specified in the "ELECTRICAL CHARACTERISTICS" table on page 3 of Vishay document 85604 and reflects the device's suitability for high-impedance reference nodes where leakage-induced error must be minimized.

Is BZX55B7V5-TAP RoHS-compliant and halogen-free?

Yes, BZX55B7V5-TAP complies with RoHS Directive 2011/65/EU and is halogen-free per Vishay's material categorization standard (document 99912). The DO-35 package uses UL 94 V-0 molding compound, and full compliance data is available in Vishay's official declaration of conformity for the BZX55-Series.

BZX55B7V5-TAP Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: BZX55

Package/Case:: DO-204AH, DO-35, Axial

Packaging:: Cut Tape (CT)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 7.5 V

Tolerance:: ±2%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 7 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 5 V

Voltage - Forward (Vf) (Max) @ If:: 1.5 V @ 200 mA

Operating Temperature:: -65°C ~ 175°C

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AH (DO-35)

BZX55B7V5-TAP FAQ

1.How can I place an order for BZX55B7V5-TAP through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX55B7V5-TAP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BZX55B7V5-TAP reliable?

The price and inventory of BZX55B7V5-TAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX55B7V5-TAP is usually 5 days.

3.What payment methods are accepted for BZX55B7V5-TAP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX55B7V5-TAP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX55B7V5-TAP?

BZX55B7V5-TAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX55B7V5-TAP order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BZX55B7V5-TAP?

For technical support, including BZX55B7V5-TAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX55B7V5-TAP requirements.

6.How does Aetrix verify that BZX55B7V5-TAP is sourced from the original manufacturer or authorized distributors?

All BZX55B7V5-TAP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZX55B7V5-TAP meets industry standards.

7.What is the process for return or replacement of BZX55B7V5-TAP?

All BZX55B7V5-TAP units undergo pre-shipment inspection (PSI). If there is an issue with BZX55B7V5-TAP, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BZX55B7V5-TAP part is unused and in its original packaging.

Return procedure for BZX55B7V5-TAP:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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