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

Nexperia USA Inc. BZX84-C4V3,215

Name: BZX84-C4V3,215
Brand: Nexperia USA Inc.
SKU: BZX84-C4V3,215
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C4V3,215

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C4V3,215.pdf

Description:: DIODE ZENER 4.3V 250MW TO236AB

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Product details

Overview

BZX84-C4V3,215 from Nexperia is a silicon planar Zener diode in SOT23 package, designed for low-power voltage regulation and reference applications. It provides a nominal 4.3 V breakdown voltage at 5 mA with ±5 % tolerance, 90 Ω maximum differential resistance, and 3 μA reverse current at 1 V, commonly used in power supply feedback loops and overvoltage protection circuits.

For engineers reviewing the BZX84-C4V3,215 datasheet, BZX84-C4V3,215 pinout, BZX84-C4V3,215 application, or BZX84-C4V3,215 equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance, thermal resistance, and SOT23 mounting compatibility with automated PCB assembly.

Technical Context

This device operates in reverse-biased Zener breakdown mode, delivering stable reference voltage under controlled current conditions. Its junction temperature range spans −55 °C to +150 °C, and it supports non-repetitive peak reverse power dissipation up to 40 W for 100 μs pulses.

The diode exhibits a negative temperature coefficient of −3.5 mV/K at 5 mA, indicating decreasing Zener voltage with rising temperature - a critical factor in precision reference designs where thermal drift must be compensated.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.0 V to 4.6 V at I_Z = 5 mA - defines usable regulation window for 4.3 V nominal design
Differential Resistance (r_dif)	≤90 Ω - determines output impedance and load regulation sensitivity
Reverse Current (I_R)	≤3 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 FR4 PCB - sets maximum continuous DC power handling
Thermal Resistance (R_th(j-a))	500 K/W - indicates junction-to-ambient heat transfer efficiency in free-air mounting
Non-repetitive Peak Power (P_ZSM)	40 W for t_p = 100 μs - enables transient surge suppression without failure
Forward Voltage (V_F)	≤0.9 V at I_F = 10 mA - relevant for polarity-check or dual-use forward conduction paths

Pinout & Package

Package: SOT23 (TO-236AB), surface-mount plastic package with 3 leads, 1.3 mm height, standard footprint per Figure 12 (reflow) and Figure 13 (wave soldering).

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward current entry point; connected to lower-potential node in Zener regulation configuration
2	Not Connected (n.c.)	Internal die bond wire stub - electrically isolated; must remain unconnected on PCB
3	Cathode (K)	Reverse-bias terminal; connected to higher-potential node and current-limiting resistor in shunt regulator topology

Key Features

Feature	Design Value
±5 % Zener voltage tolerance	Enables cost-effective regulation where tight voltage accuracy is not required, e.g., non-critical biasing
250 mW total power rating	Supports compact, low-heat designs in space-constrained consumer and industrial PCBs
SOT23 package compatibility	Ensures full compatibility with standard pick-and-place equipment and IPC-7351B land patterns
150 °C maximum junction temperature	Allows reliable operation in thermally demanding environments such as enclosed power supplies
40 W non-repetitive peak power	Provides robustness against ESD and line transients without external clamping components

Applications

Power Supply Feedback Loop

Overvoltage Protection Circuit

Use Scenario: Stabilizing output voltage in linear regulators or switching converter feedback paths using TL431-like topologies.

IC Role / Device Role / Timing Role: Shunt reference element providing precise voltage threshold for error amplifier comparison.

Use Value: Delivers stable 4.3 V reference with <90 Ω dynamic impedance, minimizing regulation error under varying load currents.

Use Scenario: Clamping transient overvoltages on microcontroller I/O lines or sensor inputs.

IC Role / Device Role / Timing Role: Passive voltage clamp activated during >4.6 V excursions, diverting excess current to ground.

Use Value: Withstands 40 W surge peaks for 100 μs, protecting downstream CMOS inputs rated for ≤5.5 V absolute maximum.

Low-Power Bias Network

Reference Voltage Generator

Use Scenario: Generating stable bias points for op-amp input stages or transistor base drive in battery-powered devices.

IC Role / Device Role / Timing Role: Low-current Zener source supplying fixed voltage to high-impedance nodes.

Use Value: Draws only ≤3 μA at 1 V reverse bias, extending battery life while maintaining 4.3 V reference stability at 5 mA operating point.

Use Scenario: Providing a known reference for ADC calibration or comparator hysteresis thresholds.

IC Role / Device Role / Timing Role: Precision voltage anchor with predictable temperature coefficient (−3.5 mV/K) for drift-aware designs.

Use Value: Enables first-order thermal compensation when paired with positive-TC components, improving reference stability across −40 °C to +85 °C.

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
MMBZ5225BS-7-F	4.3 V nominal, ±5 %, 200 mW P_tot, SOT23 package, 100 Ω r_dif	Higher dynamic impedance reduces regulation precision at low currents	Select when legacy Diodes Inc. sourcing is preferred and 100 Ω r_dif meets system error budget
1SMA5913BT3G	4.3 V nominal, ±5 %, 1.5 W P_tot, SMA package, 10 Ω r_dif	Larger SMA package incompatible with dense SOT23 layouts; higher power rating unnecessary for low-current refs	Choose only if board layout allows SMA and lower impedance (<10 Ω) is mandatory for high-precision feedback

Compared with MMBZ5225BS-7-F and 1SMA5913BT3G, BZX84-C4V3,215 offers optimal balance of SOT23 footprint compatibility, 90 Ω impedance, and 250 mW rating for space-constrained, medium-accuracy regulation - avoiding both excessive size and insufficient precision.

Availability

BZX84-C4V3,215 is available at Aetrix Electronics and suitable for power supply feedback loops, overvoltage protection circuits, low-power bias networks, and reference voltage generators requiring stable component supply across industrial, consumer, and embedded design cycles.

Supply support for BZX84-C4V3,215 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 leading semiconductor manufacturer specializing in high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands.

The BZX84 series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-sensitive, space-constrained voltage regulation and reference applications in consumer, industrial, and computing electronics.

FAQ

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

The BZX84-C4V3,215 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 on an FR4 PCB, it supports up to ~58 mA (250 mW ÷ 4.3 V) before exceeding P_tot; derating is required above 25 °C per the 500 K/W thermal resistance.

Is Pin 2 internally connected or truly floating?

Pin 2 is explicitly marked "n.c." (not connected) in Nexperia's official pinning diagram and package documentation. It is an unconnected lead - no internal bond wire or die connection exists. PCB layout must leave this pad unconnected to avoid unintended shorts or parasitic coupling.

How does the −3.5 mV/K temperature coefficient affect circuit performance?

The negative temperature coefficient means the Zener voltage decreases by approximately 3.5 mV per degree Celsius rise in junction temperature. In a 4.3 V reference, this yields ~0.08 %/°C drift - acceptable for non-precision applications but requires compensation (e.g., with positive-TC resistors) in systems operating across wide temperature ranges.

Can this diode be used in avalanche mode for noise generation?

No - the BZX84-C4V3,215 is a planar Zener diode optimized for controlled Zener breakdown below 5.6 V. Its noise characteristics are not specified or characterized for intentional avalanche noise generation; dedicated noise diodes (e.g., 1N2900 series) are recommended for that purpose.

BZX84-C4V3,215 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):: 4.3 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 90 Ohms

Current - Reverse Leakage @ Vr:: 3 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-C4V3,215 FAQ

1.How can I place an order for BZX84-C4V3,215 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C4V3,215 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-C4V3,215 reliable?

The price and inventory of BZX84-C4V3,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C4V3,215 is usually 5 days.

3.What payment methods are accepted for BZX84-C4V3,215?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C4V3,215 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C4V3,215?

BZX84-C4V3,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C4V3,215 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-C4V3,215?

For technical support, including BZX84-C4V3,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C4V3,215 requirements.

6.How does Aetrix verify that BZX84-C4V3,215 is sourced from the original manufacturer or authorized distributors?

All BZX84-C4V3,215 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-C4V3,215 meets industry standards.

7.What is the process for return or replacement of BZX84-C4V3,215?

All BZX84-C4V3,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C4V3,215, 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-C4V3,215 part is unused and in its original packaging.

Return procedure for BZX84-C4V3,215:

1.Submit a request within 90 days.

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

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