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

Nexperia USA Inc. BZX84-C2V4,235

Name: BZX84-C2V4,235
Brand: Nexperia USA Inc.
SKU: BZX84-C2V4,235
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C2V4,235

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C2V4,235.pdf

Description:: DIODE ZENER 2.4V 250MW TO236AB

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Product details

Overview

BZX84-C2V4,235 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 2.4 V nominal breakdown voltage at 5 mA, 250 mW total power dissipation, and 40 W non-repetitive peak reverse power. It serves as a precision reference or low-power voltage clamp in power supply feedback loops, sensor biasing, and overvoltage protection circuits.

For engineers reviewing the BZX84-C2V4,235 datasheet, BZX84-C2V4,235 pinout, BZX84-C2V4,235 application, or BZX84-C2V4,235 equivalent, key selection criteria include its 2.4 V Zener voltage tolerance (±5 %), 600 Ω maximum differential resistance at 5 mA, 100 μA reverse current at 1 V, -3.5 to 0.0 mV/K temperature coefficient, and SOT23-compatible thermal resistance of 500 K/W junction-to-ambient.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal 2.4 V regulation voltage at I_Z = 5 mA, exhibiting a typical temperature coefficient between -3.5 mV/K and 0.0 mV/K across its operating range. Its differential resistance remains ≤600 Ω under specified test conditions, ensuring stable regulation under moderate load variation.

The device is designed for surface-mount use on FR4 PCBs with single-sided 70 µm copper, delivering 250 mW continuous power dissipation at T_amb ≤ 25 °C and surviving 40 W non-repetitive surges (100 μs square wave, T_j = 25 °C). Junction temperature is rated up to 150 °C, with storage temperature spanning -65 °C to +150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	2.20 V to 2.60 V at I_Z = 5 mA - defines regulation band for low-voltage reference stability
Differential Resistance (r_dif)	≤600 Ω at I_Z = 5 mA - limits output impedance and voltage drift under load changes
Reverse Current (I_R)	≤100 μA at V_R = 1 V - ensures low leakage in standby or high-impedance bias networks
Total Power Dissipation (P_tot)	250 mW at T_amb ≤ 25 °C on standard FR4 PCB - sets maximum continuous DC power handling
Non-repetitive Peak Reverse Power (P_ZSM)	40 W for 100 μs pulse - supports transient overvoltage clamping without failure
Junction-to-Ambient Thermal Resistance (R_th(j-a))	500 K/W - determines steady-state temperature rise above ambient under full power
Forward Voltage (V_F)	≤0.9 V at I_F = 10 mA - defines conduction loss when used in forward-biased protection paths

Pinout & Package

Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with standard footprint per Figure 12 (reflow) and Figure 13 (wave soldering); dimensions: 2.9 mm × 1.3 mm × 1.0 mm (L × W × H).

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connected to lower-potential node in reverse-bias configuration; carries forward current during fault or startup
2	Not Connected (n.c.)	Internal die pad with no electrical connection; must remain unconnected in PCB layout
3	Cathode (K)	Connected to higher-potential node in reverse-bias configuration; primary terminal for Zener breakdown current path

Key Features

Feature	Design Value
±5 % Zener voltage tolerance	Enables cost-effective voltage referencing where tight regulation is not required, e.g., non-critical biasing
250 mW continuous power rating	Supports operation in compact, low-power designs without heatsinking on standard FR4 PCBs
40 W surge capability (100 μs)	Provides robust transient suppression for ESD and line-spike events in industrial I/O interfaces
Low 100 μA reverse leakage at 1 V	Maintains signal integrity in high-impedance analog nodes such as op-amp reference inputs
SOT23 footprint compatibility	Enables automated placement and reflow assembly alongside other discrete passives and ICs

Applications

Power Supply Feedback Reference

Sensor Biasing Network

Use Scenario: Stabilizing output voltage in low-current linear regulators or switching converter feedback dividers.

IC Role / Device Role / Timing Role: Zener voltage reference providing fixed 2.4 V threshold for error amplifier comparison.

Use Value: Delivers predictable regulation within ±5 % tolerance without requiring external trimming or active circuitry.

Use Scenario: Supplying stable bias current to analog sensors (e.g., thermistors, photodiodes) in portable instrumentation.

IC Role / Device Role / Timing Role: Low-leakage voltage clamp establishing known bias point for sensor excitation.

Use Value: Maintains <100 μA reverse current at 1 V, minimizing loading error in high-impedance sensor bridges.

Overvoltage Clamp for GPIO Protection

Low-Voltage Logic-Level Shifting

Use Scenario: Protecting microcontroller input pins from transient overvoltage exceeding 3.3 V rail.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting surge current away from sensitive CMOS inputs.

Use Value: Activates at 2.4 V Zener voltage with 40 W peak power handling, limiting clamped voltage to safe levels.

Use Scenario: Translating 5 V logic signals down to 2.4 V compatible levels for mixed-voltage interface circuits.

IC Role / Device Role / Timing Role: Passive level translator using forward-biased anode–cathode drop (~0.9 V) and reverse Zener knee.

Use Value: Enables bidirectional translation with ≤0.9 V forward drop and sharp 2.4 V reverse knee for clean threshold definition.

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 MMBZ5221BS	2.4 V ±5 %, 225 mW P_tot, 300 Ω r_dif, SOT23 package	Lower power rating and tighter differential resistance; suitable for lower-current references	Select when lower dynamic impedance is prioritized over surge margin
Vishay BZX84-C2V4-7-F	2.4 V ±5 %, 300 mW P_tot, 600 Ω r_dif, same SOT23 footprint	Higher continuous power rating but identical Zener characteristics and thermal profile	Select when extended DC power headroom is needed without layout change

Compared with BZX84-C2V4,235, MMBZ5221BS offers lower dynamic impedance at reduced power capacity, while BZX84-C2V4-7-F provides 50 mW more continuous dissipation with identical regulation behavior and pinout-enabling direct substitution where thermal margin is constrained.

Availability

BZX84-C2V4,235 is available at Aetrix Electronics and suitable for power supply feedback references, sensor biasing networks, GPIO overvoltage clamps, and low-voltage logic-level shifting requiring stable component supply and consistent ±5 % Zener tolerance.

Supply support for BZX84-C2V4,235 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 essential semiconductors for automotive, industrial, and consumer applications.

The BZX84 series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-sensitive, space-constrained applications requiring stable low-voltage regulation and transient protection in SMT manufacturing environments.

FAQ

What is the maximum continuous reverse current this diode can sustain at 25 °C?

The BZX84-C2V4,235 is rated for a maximum forward current of 200 mA, but its continuous reverse (Zener) current is limited by power dissipation. At 25 °C ambient and 2.4 V Zener voltage, the maximum sustainable Zener current is approximately 104 mA (250 mW ÷ 2.4 V), assuming no additional thermal derating from PCB layout.

Can this diode be used in a 3.3 V system for overvoltage protection?

Yes - when reverse-biased between a 3.3 V node and ground, the BZX84-C2V4,235 begins conducting significantly above ~2.4 V, clamping transients before they reach damaging levels. Its 40 W surge rating supports short-duration spikes, though sustained overvoltage will exceed its 250 mW limit and require series current limiting.

How does the temperature coefficient affect regulation accuracy over -40 °C to +85 °C?

At 2.4 V nominal, the BZX84-C2V4,235 exhibits a temperature coefficient ranging from -3.5 mV/K to 0.0 mV/K. Over a 125 K span, this introduces up to ±438 mV drift (125 × 3.5 mV), meaning actual regulation may vary from ~1.96 V to ~2.44 V depending on junction temperature and operating current.

Is Pin 2 electrically isolated or internally bonded in the SOT23 package?

Pin 2 is explicitly marked "n.c." (not connected) in the official Nexperia pinning diagram and has no internal bond wire or die connection. It must remain unconnected on the PCB; routing traces or solder to it may cause mechanical stress or unintended parasitic coupling but introduces no functional electrical path.

BZX84-C2V4,235 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):: 2.4 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 50 µA @ 1 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-C2V4,235 FAQ

1.How can I place an order for BZX84-C2V4,235 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C2V4,235 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-C2V4,235 reliable?

The price and inventory of BZX84-C2V4,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C2V4,235 is usually 5 days.

3.What payment methods are accepted for BZX84-C2V4,235?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C2V4,235 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C2V4,235?

BZX84-C2V4,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C2V4,235 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-C2V4,235?

For technical support, including BZX84-C2V4,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C2V4,235 requirements.

6.How does Aetrix verify that BZX84-C2V4,235 is sourced from the original manufacturer or authorized distributors?

All BZX84-C2V4,235 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-C2V4,235 meets industry standards.

7.What is the process for return or replacement of BZX84-C2V4,235?

All BZX84-C2V4,235 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C2V4,235, 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-C2V4,235 part is unused and in its original packaging.

Return procedure for BZX84-C2V4,235:

1.Submit a request within 90 days.

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

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