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

Nexperia USA Inc. BZX84-C24,235

Name: BZX84-C24,235
Brand: Nexperia USA Inc.
SKU: BZX84-C24,235
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C24,235

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BZX84-C24,235.pdf

Description:: DIODE ZENER 24V 250MW TO236AB

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Inventory:9,650

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Product details

Overview

BZX84-C24,235 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, designed for precision low-power voltage reference and clamping in space-constrained PCBs. It delivers 24 V nominal breakdown voltage at 5 mA test current, with 250 mW total power dissipation and 55 Ω typical differential resistance - used in power supply feedback loops, overvoltage protection circuits, and analog sensor biasing.

For engineers reviewing the BZX84-C24,235 datasheet, BZX84-C24,235 pinout, BZX84-C24,235 application, or BZX84-C24,235 equivalent, key selection criteria include its ±5 % V_Z tolerance, 22.8–25.6 V working range, non-repetitive 40 W surge capability, thermal resistance of 500 K/W (junction-to-ambient), and SOT23-compatible footprint for high-density routing.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain stable DC voltage under varying load or input conditions. Its 24 V nominal regulation point is specified at I_Z = 5 mA, with temperature coefficient of +16.8 mV/K and reverse leakage < 0.05 μA at 19.2 V.

The device uses silicon planar epitaxial construction for consistent parametric stability across temperature (−55 °C to +150 °C ambient) and lifetime. Its 3-pin SOT23 configuration includes anode (Pin 1), unconnected terminal (Pin 2), and cathode (Pin 3), enabling unidirectional clamping without series resistor dependency in low-current applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_Z (Nominal)	24 V - Stable regulation voltage at 5 mA test current; actual range 22.8–25.6 V per ±5 % tolerance
P_tot	250 mW - Maximum continuous power dissipation on FR4 PCB with standard footprint; limits steady-state current to ~10.4 mA at 24 V
r_dif	250 Ω - Differential resistance at I_Z = 5 mA; determines output impedance and load regulation error
I_R @ V_R = 19.2 V	< 0.05 μA - Reverse leakage below knee voltage; ensures minimal quiescent current in standby circuits
T_j max	150 °C - Maximum junction temperature; defines thermal derating slope (0.67 mW/°C above 25 °C ambient)
I_ZSM	1.25 A - Non-repetitive peak reverse current for 100 μs pulse; supports transient overvoltage suppression
C_d	55 pF - Junction capacitance at 0 V; impacts high-frequency noise filtering and response time in clamp circuits

Pinout & Package

Package: SOT23 (TO-236AB), surface-mount plastic package with 3 leads, 1.3 mm height, and standard FR4-compatible footprint (2.8 × 1.4 mm body).

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connected to lower-potential node in reverse-bias configuration; carries forward current during fault conditions
2	Not Connected (n.c.)	Internally isolated; no electrical function - must remain unconnected on PCB to avoid parasitic coupling
3	Cathode (K)	Connected to regulated output node; provides reference potential and sinks Zener current to ground or return path

Key Features

Feature	Design Value
±5 % V_Z tolerance	Enables cost-effective voltage referencing where tight regulation is not required - e.g., comparator thresholds or LED biasing
250 mW power rating	Supports operation up to 10.4 mA continuous current at 24 V without heatsinking on standard PCB
Non-repetitive 40 W surge rating	Withstands 100 μs transients up to 1.25 A - suitable for ESD and inductive kick clamping in industrial I/O
SOT23 footprint compatibility	Allows drop-in replacement in legacy designs using JEDEC-standard 3-pin SMD packages; enables automated assembly
−55 °C to +150 °C operating range	Validates use in extended-temperature environments such as automotive under-hood modules or outdoor power converters

Applications

Power Supply Feedback

Overvoltage Clamp

Use Scenario: Regulating output voltage in low-cost linear regulators or switching converter feedback networks.

IC Role / Device Role / Timing Role: Provides stable 24 V reference to error amplifier input; sets output setpoint via resistive divider.

Use Value: Maintains ±5 % output accuracy across line/load variations without external trimming components.

Use Scenario: Protecting microcontroller GPIO or ADC inputs from transient overvoltage events.

IC Role / Device Role / Timing Role: Acts as shunt clamp between signal line and ground; conducts only when voltage exceeds 24 V threshold.

Use Value: Limits peak voltage to ≤25.6 V with <1.25 A surge current handling - sufficient for IEC 61000-4-2 Level 3 ESD.

Sensor Biasing

Reference Voltage Source

Use Scenario: Supplying excitation voltage to resistive temperature detectors (RTDs) or pressure sensors.

IC Role / Device Role / Timing Role: Delivers stable 24 V bias independent of supply rail fluctuations; minimizes measurement drift.

Use Value: Low 55 Ω dynamic impedance ensures <0.1 % voltage shift under 1 mA sensor load variation.

Use Scenario: Generating precise mid-rail or auxiliary reference voltages in analog front-ends.

IC Role / Device Role / Timing Role: Functions as passive two-terminal reference; paired with series resistor for current-limited sourcing.

Use Value: Temperature coefficient of +16.8 mV/K allows predictable drift compensation in calibrated systems.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBZ5245BS	24 V ±5 %, 350 mW P_tot, 100 Ω r_dif, SOT23 package	Higher power rating enables 14.6 mA continuous operation; lower dynamic impedance improves regulation under load	Select when tighter load regulation or higher surge margin is required; verify thermal layout for 350 mW dissipation
Diodes Incorporated BZX84C24-7-F	24 V ±5 %, 300 mW P_tot, 250 Ω r_dif, same SOT23 footprint	Higher power rating but identical dynamic impedance; slightly wider V_Z spread (22.8–25.6 V vs. 22.8–25.6 V)	Preferred for designs requiring extended lifetime reliability under sustained 250 mW operation; RoHS-compliant variant

Compared with BZX84-C24,235, the MMBZ5245BS offers superior regulation stability due to lower r_dif, while the BZX84C24-7-F extends thermal headroom without altering circuit layout - both retain pin-for-pin compatibility but differ in long-term power derating behavior.

Availability

BZX84-C24,235 is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and sensor biasing requiring stable component supply across industrial control, instrumentation, and embedded power management systems.

Supply support for BZX84-C24,235 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.

The BZX84 series belongs to Nexperia's precision Zener regulator portfolio, engineered for cost-sensitive, space-constrained applications demanding stable voltage references without active regulation circuitry.

FAQ

What is the maximum continuous reverse current this diode can handle at 24 V?

At 24 V, the maximum continuous reverse current is limited by power dissipation: I_Z = P_tot/V_Z = 250 mW / 24 V ≈ 10.4 mA. This assumes T_amb ≤ 25 °C on FR4 PCB; derating applies at higher ambient temperatures per R_th(j-a) = 500 K/W.

Can Pin 2 be left floating or must it be grounded?

Pin 2 is internally not connected (n.c.) and must remain unconnected on the PCB. Grounding or routing it creates unintended parasitic paths that may degrade leakage performance or cause board-level coupling noise in sensitive analog circuits.

How does the +16.8 mV/K temperature coefficient affect regulation accuracy over −40 °C to +85 °C?

Over a 125 °C range, the V_Z shift is +16.8 mV/K × 125 K = +2.1 V. So regulation shifts from ~23.5 V at −40 °C to ~25.6 V at +85 °C - within the ±5 % initial tolerance band, making it suitable for non-critical biasing where absolute accuracy is secondary to stability.

Is this diode suitable for automotive applications?

No. Per Nexperia's Rev. 7 datasheet, the BZX84 series is explicitly non-automotive qualified. It lacks AEC-Q101 stress testing and automotive-grade screening. For automotive use, select Nexperia's BZX84-Q series or equivalent AEC-Q101-certified Zeners.

BZX84-C24,235 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BZX84

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 24 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 70 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 16.8 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX84-C24,235 FAQ

1.How can I place an order for BZX84-C24,235 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C24,235 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 BZX84-C24,235 reliable?

The price and inventory of BZX84-C24,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C24,235 is usually 5 days.

3.What payment methods are accepted for BZX84-C24,235?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C24,235 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C24,235?

BZX84-C24,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C24,235 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 BZX84-C24,235?

For technical support, including BZX84-C24,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C24,235 requirements.

6.How does Aetrix verify that BZX84-C24,235 is sourced from the original manufacturer or authorized distributors?

All BZX84-C24,235 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 BZX84-C24,235 meets industry standards.

7.What is the process for return or replacement of BZX84-C24,235?

All BZX84-C24,235 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C24,235, 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 BZX84-C24,235 part is unused and in its original packaging.

Return procedure for BZX84-C24,235:

1.Submit a request within 90 days.

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

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