Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Vishay General Semiconductor - Diodes Division BZX55B24-TAP

Name: BZX55B24-TAP
Brand: Vishay General Semiconductor - Diodes Division
SKU: BZX55B24-TAP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BZX55B24-TAP

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

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

Datasheet:: BZX55B24-TAP.pdf

Description:: DIODE ZENER 24V 500MW DO204AH

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:28,731

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BZX55B24-TAP from Vishay Semiconductors is a precision 24 V Zener diode in DO-35 package, designed for voltage regulation and reference applications with ±2% tolerance (23.5–24.5 V at 5 mA), 18 Ω dynamic resistance, and low 0.1 μA reverse leakage at 19.2 V. It delivers stable clamping in power supply feedback loops, overvoltage protection circuits, and analog reference designs.

For engineers reviewing the BZX55B24-TAP datasheet, BZX55B24-TAP pinout, BZX55B24-TAP application, or BZX55B24-TAP equivalent, key selection criteria include its tight 2% Zener voltage tolerance, low 18 Ω impedance at 5 mA, temperature coefficient of +0.04%/K at 25 °C, DO-35 mechanical compatibility, and suitability for low-noise voltage reference and stabilization in industrial and automotive subsystems.

Technical Context

This device operates as a single-element, silicon planar Zener diode optimized for sharp reverse breakdown and high stability under DC or low-frequency pulse conditions. Its design targets precise voltage referencing with minimal drift-exhibiting a nominal temperature coefficient of +0.04%/K at 25 °C and +0.12%/K at 150 °C, and maintaining ≤0.1 μA reverse leakage current at VR = 19.2 V.

The BZX55B24-TAP is rated for 500 mW total power dissipation at TL = 25 °C with 4 mm lead length, and features a thermal resistance of 300 K/W junction-to-ambient. Its DO-35 (DO-204AH) glass-passivated package ensures robust reliability and compatibility with standard through-hole reflow and wave soldering profiles up to 260 °C peak.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	23.5–24.5 V at I_ZT = 5 mA - defines precise clamping threshold for regulation and protection circuits
Dynamic Resistance (Z_Z)	< 80 Ω at 5 mA - ensures minimal output voltage variation under load current changes
Reverse Leakage Current (I_R)	< 0.1 μA at V_R = 19.2 V - guarantees low standby power loss and high impedance in off-state
Temperature Coefficient (T_KVZ)	+0.04%/K at 25 °C - enables predictable, low-drift voltage reference behavior across operating range
Power Dissipation (P_tot)	500 mW at T_L = 25 °C - supports continuous operation in compact PCB layouts with 4 mm lead length
Junction Temperature (T_j)	175 °C maximum - allows reliable use in high-ambient environments such as engine control units and industrial drives
Package	DO-35 (DO-204AH) - industry-standard axial glass package with cathode band marking and 125 mg mass

Pinout & Package

DO-35 (DO-204AH) axial-leaded glass package with cathode identified by a painted band. Leads are tinned copper-clad steel; body diameter Ø0.4–0.6 mm, overall length ≥26 mm, lead length ≥3.1 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-side connection	Connected to ground or lower potential node in shunt regulator configuration
Cathode	Zener breakdown terminal / high-side connection	Connected to input voltage source; carries regulated output when used in parallel with load

Key Features

Feature	Design Value
Very sharp reverse characteristic	Enables precise, low-hysteresis voltage clamping critical for analog reference and feedback accuracy
Low reverse current level	< 0.1 μA at 80% V_Z minimizes quiescent power draw in battery-powered and energy-sensitive systems
Very high stability	Guaranteed long-term voltage drift < 1% after 1000 h burn-in-essential for calibration-critical instrumentation
Low noise	Minimal broadband noise generation preserves signal integrity in precision ADC reference and sensor biasing
UL 94 V-0 molding compound	Ensures flame-retardant performance in safety-compliant industrial and automotive end equipment

Applications

Power Supply Voltage Reference	Overvoltage Protection Clamp
Use Scenario: Stabilizing feedback node in isolated DC/DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Shunt reference element providing fixed 24 V reference to optocoupler input or error amplifier. Use Value: Tight 2% V_Z tolerance and 18 Ω Z_Z ensure <±1% output voltage accuracy across line/load/temperature variations.	Use Scenario: Protecting microcontroller I/O pins from transient surges on 24 V industrial bus lines. IC Role / Device Role / Timing Role: Passive clamp limiting voltage to safe 24.5 V max during ESD or inductive kick events. Use Value: Sub-μA leakage preserves high-impedance input integrity; fast 1 ns recovery avoids false triggering in digital interfaces.
Temperature-Stable Sensor Bias	Calibration Reference Source
Use Scenario: Providing excitation voltage to RTD or bridge-based pressure sensors in HVAC controllers. IC Role / Device Role / Timing Role: Low-drift 24 V bias source compensating for ambient temperature fluctuations. Use Value: +0.04%/K TCV_Z enables predictable, linearized sensor output without complex compensation algorithms.	Use Scenario: Serving as traceable voltage standard in portable multimeter and data logger calibration fixtures. IC Role / Device Role / Timing Role: Primary reference node in automated test equipment requiring repeatable 24 V setpoint. Use Value: High long-term stability (<1% drift) and low 0.1 μA leakage support NIST-traceable accuracy over 1000+ hours.

Power Supply Voltage Reference

Overvoltage Protection Clamp

Use Scenario: Stabilizing feedback node in isolated DC/DC converter secondary-side regulation.

IC Role / Device Role / Timing Role: Shunt reference element providing fixed 24 V reference to optocoupler input or error amplifier.

Use Value: Tight 2% V_Z tolerance and 18 Ω Z_Z ensure <±1% output voltage accuracy across line/load/temperature variations.

Use Scenario: Protecting microcontroller I/O pins from transient surges on 24 V industrial bus lines.

IC Role / Device Role / Timing Role: Passive clamp limiting voltage to safe 24.5 V max during ESD or inductive kick events.

Use Value: Sub-μA leakage preserves high-impedance input integrity; fast 1 ns recovery avoids false triggering in digital interfaces.

Temperature-Stable Sensor Bias

Calibration Reference Source

Use Scenario: Providing excitation voltage to RTD or bridge-based pressure sensors in HVAC controllers.

IC Role / Device Role / Timing Role: Low-drift 24 V bias source compensating for ambient temperature fluctuations.

Use Value: +0.04%/K TCV_Z enables predictable, linearized sensor output without complex compensation algorithms.

Use Scenario: Serving as traceable voltage standard in portable multimeter and data logger calibration fixtures.

IC Role / Device Role / Timing Role: Primary reference node in automated test equipment requiring repeatable 24 V setpoint.

Use Value: High long-term stability (<1% drift) and low 0.1 μA leakage support NIST-traceable accuracy over 1000+ hours.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4749A-TAP	24 V nominal, ±5% tolerance (22.8–25.2 V), 20 Ω Z_Z, higher 10 μA I_R at 19.2 V	Lower precision; suitable for non-critical regulation where cost is prioritized over stability	Select when budget constraints outweigh need for tight tolerance and ultra-low leakage
BZX85C24-TAP	24 V nominal, ±5% tolerance, 1.3 W P_tot, larger DO-41 package, higher thermal mass	Higher power handling but reduced board density; less suitable for space-constrained PCBs	Choose for high-power derating margin or legacy DO-41 footprint compatibility

Compared with BZX55B24-TAP, the 1N4749A-TAP trades precision and leakage performance for lower cost, while the BZX85C24-TAP offers greater power capability at the expense of size and thermal response speed-making BZX55B24-TAP optimal for compact, high-stability 24 V reference designs.

Availability

BZX55B24-TAP is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and precision sensor interface circuits requiring stable component supply, consistent parametric performance, and long-lifecycle availability.

Supply support for BZX55B24-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 leadership in reliability-critical power and signal conditioning devices.

The BZX55-Series is part of Vishay's precision Zener diode portfolio engineered for voltage reference, regulation, and protection in industrial, automotive, and medical systems demanding tight tolerance and long-term stability.

FAQ

What is the Zener voltage tolerance of BZX55B24-TAP?

The BZX55B24-TAP has a guaranteed Zener voltage range of 23.5 V to 24.5 V at test current I_ZT = 5 mA, corresponding to a ±2% tolerance about the nominal 24 V value. This tight specification is confirmed in the Vishay BZX55-Series datasheet revision 2.0 (Document Number: 85604), Table on page 3 for BZX55B24.

Does BZX55B24-TAP support surface-mount assembly?

No, BZX55B24-TAP uses the DO-35 (DO-204AH) axial-leaded glass package and is intended for through-hole mounting only. It is not compatible with SMT reflow processes. For surface-mount equivalents, consider Vishay's SMAZ24 or BZX384-B24 series, which are distinct part families with different packaging and ratings.

What is the maximum power dissipation rating for BZX55B24-TAP?

The BZX55B24-TAP is rated for 500 mW total power dissipation at lead temperature T_L = 25 °C with 4 mm lead length, as specified in the Absolute Maximum Ratings table (page 2 of Vishay Document 85604). Derating is required above 25 °C ambient per the published curve in Figure 2.

How does the temperature coefficient of BZX55B24-TAP affect its performance?

The BZX55B24-TAP exhibits a nominal temperature coefficient of +0.04%/K at 25 °C and +0.12%/K at 150 °C, meaning its Zener voltage increases predictably with junction temperature. This positive, low-drift behavior supports stable reference operation in environments up to 175 °C junction temperature, as verified in the Electrical Characteristics table (page 3).

Is BZX55B24-TAP RoHS-compliant and halogen-free?

Yes, BZX55B24-TAP complies with RoHS Directive 2011/65/EU and is halogen-free per Vishay's material declaration (Document Number: 99912). The DO-35 package uses UL 94 V-0 compliant molding compound and lead-free terminations, meeting JEDEC J-STD-020 moisture sensitivity level 1 requirements.

BZX55B24-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):: 24 V

Tolerance:: ±2%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 80 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 18 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)

BZX55B24-TAP FAQ

1.How can I place an order for BZX55B24-TAP through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX55B24-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 BZX55B24-TAP reliable?

The price and inventory of BZX55B24-TAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX55B24-TAP is usually 5 days.

3.What payment methods are accepted for BZX55B24-TAP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX55B24-TAP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX55B24-TAP?

BZX55B24-TAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX55B24-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 BZX55B24-TAP?

For technical support, including BZX55B24-TAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX55B24-TAP requirements.

6.How does Aetrix verify that BZX55B24-TAP is sourced from the original manufacturer or authorized distributors?

All BZX55B24-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 BZX55B24-TAP meets industry standards.

7.What is the process for return or replacement of BZX55B24-TAP?

All BZX55B24-TAP units undergo pre-shipment inspection (PSI). If there is an issue with BZX55B24-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 BZX55B24-TAP part is unused and in its original packaging.

Return procedure for BZX55B24-TAP:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…