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

Nexperia USA Inc. BZX384-C11F

Name: BZX384-C11F
Brand: Nexperia USA Inc.
SKU: BZX384-C11F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX384-C11F

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: BZX384-C11F.pdf

Description:: DIODE ZENER 11V 300MW SOD323

Quantity:: RFQ Add To RFQ list

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Inventory:11,071

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Product details

Overview

BZX384-C11F from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 11 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and 150 °C maximum junction temperature. It provides stable reference voltage in low-power linear regulators, overvoltage protection circuits, and voltage-clamping applications in consumer and industrial electronics.

For engineers reviewing the BZX384-C11F datasheet, BZX384-C11F pinout, BZX384-C11F application, or BZX384-C11F equivalent, key selection criteria include its 11 V Zener voltage with ±5 % tolerance, 150 Ω typical differential resistance at 5 mA, 0.1 μA reverse current at 8.8 V, and thermal resistance of 415 K/W in free air - all critical for precision biasing and transient suppression design.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals under varying load and temperature conditions. Its 11 V nominal Zener voltage is specified at I_Z = 5 mA, with a temperature coefficient of +5.4 mV/K and differential resistance of ≤150 Ω, enabling predictable regulation in low-current analog circuits.

The device features non-repetitive peak reverse power dissipation of 40 W (100 μs pulse), forward voltage of ≤0.9 V at 10 mA, and reverse current of ≤0.1 μA at VR = 8.8 V, supporting reliable clamping and voltage stabilization in compact PCB layouts with FR4 single-sided copper mounting.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	11 V nominal at I_Z = 5 mA; ±5 % tolerance ensures usable range of 10.4 V to 11.6 V in production designs.
Differential Resistance (r_dif)	≤150 Ω at I_Z = 5 mA; determines output impedance and regulation sensitivity to current changes.
Reverse Current (I_R)	≤0.1 μA at V_R = 8.8 V; defines leakage before breakdown, critical for low-power standby circuits.
Total Power Dissipation (P_tot)	300 mW at T_amb ≤ 25 °C on FR4 PCB; sets maximum continuous DC power handling in standard layout.
Non-repetitive Peak Reverse Power	40 W for 100 μs pulses; enables transient surge suppression without device failure.
Junction Temperature (T_j)	−65 °C to +150 °C operating range; supports industrial ambient environments and reflow soldering profiles.
Thermal Resistance (R_th(j-a))	415 K/W in free air; informs derating requirements when ambient exceeds 25 °C.

Pinout & Package

SOD323 (SC-76) surface-mount plastic package with 2 leads; cathode marked by bar on top surface; footprint compatible with standard reflow and wave soldering per Nexperia's recommended land patterns.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Connected to higher-potential node in reverse-bias configuration; marking bar identifies this terminal.
2	Anode (A)	Connected to lower-potential node (e.g., ground or return path); completes Zener conduction path.

Key Features

Feature	Design Value
Low-power Zener regulation	300 mW P_tot enables use in space-constrained, battery-powered, or thermally limited designs without heatsinking.
±5 % voltage tolerance	Cost-optimized alternative to tighter-tolerance A/B series while maintaining functional stability in non-critical references.
Small SOD323 footprint	2.3 mm × 1.35 mm body size reduces PCB area by >50 % vs. DO-35, supporting high-density mixed-signal layouts.
150 °C junction rating	Supports operation in automotive under-hood adjacent zones and industrial control enclosures without thermal shutdown.
40 W surge capability	Withstands ESD and inductive kickback events per IEC 61000-4-2 Level 4 without degradation when properly decoupled.

Applications

Power Supply Reference

Overvoltage Clamp

Use Scenario: Stabilizing feedback voltage in low-current linear regulators (e.g., LDO bias networks or op-amp reference dividers).

IC Role / Device Role / Timing Role: Provides fixed 11 V reference point to set output voltage via resistor divider; operates continuously in reverse breakdown.

Use Value: Delivers <1 % output drift over −40 °C to +85 °C due to +5.4 mV/K temperature coefficient and low r_dif.

Use Scenario: Protecting microcontroller I/O pins from voltage transients exceeding 11 V during hot-plug or ESD events.

IC Role / Device Role / Timing Role: Acts as shunt clamp between signal line and ground; conducts only during overvoltage excursions above 11 V.

Use Value: Limits transient duration to <100 μs with 40 W peak power handling, preventing latch-up or gate oxide damage.

Signal Level Shifting

Current Source Bias

Use Scenario: Translating logic-level signals between 3.3 V and 5 V domains using Zener-based level translators.

IC Role / Device Role / Timing Role: Clamps high-side rail to 11 V minus forward drop, establishing offset voltage for bidirectional signal translation.

Use Value: Enables sub-10 ns response to fast edges due to low 15 pF capacitance at 0 V and minimal stored charge.

Use Scenario: Setting precise bias current in constant-current LED drivers or sensor excitation circuits.

IC Role / Device Role / Timing Role: Forms stable voltage reference across series resistor to generate regulated current (e.g., I_OUT = (V_Z − V_BE)/R).

Use Value: Maintains <±2 % current accuracy over supply variations thanks to tight V_Z tolerance and low r_dif.

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 MMBZ5240BS	10 V nominal, ±5 %, SOD-123 package, 225 mW P_tot, 170 Ω r_dif	Lower voltage and power rating; less suitable for 11 V systems requiring margin above 10 V.	Select when 10 V reference suffices and board space allows larger SOD-123 footprint.
Vishay BZX384-B11	11 V nominal, ±2 %, same SOD323 package, identical P_tot and thermal specs	Tighter tolerance improves reference accuracy but increases cost; no change in surge or thermal behavior.	Choose for precision analog circuits where ±2 % V_Z stability outweighs cost premium.

Compared with BZX384-C11F, MMBZ5240BS offers lower voltage and reduced power handling, limiting use in 11 V systems, while BZX384-B11 delivers superior voltage accuracy without altering thermal or surge performance - making it ideal for metrology-grade references where cost is secondary to precision.

Availability

BZX384-C11F is available at Aetrix Electronics and suitable for voltage reference generation, overvoltage protection, and signal conditioning applications requiring stable component supply, consistent parametric performance, and long-term obsolescence management.

Supply support for BZX384-C11F 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 BZX384 series belongs to Nexperia's precision Zener diode product line, engineered for cost-sensitive, space-constrained applications demanding stable voltage regulation without active circuitry.

FAQ

What is the maximum continuous reverse current the BZX384-C11F can sustain?

The BZX384-C11F is not rated for continuous reverse current; it operates in controlled breakdown at I_Z = 5 mA for regulation. Its absolute maximum average reverse current is derived from P_tot = 300 mW and V_Z = 11 V, yielding ~27 mA max DC current - but sustained operation above 5 mA increases temperature rise and degrades long-term stability.

Can BZX384-C11F be used in place of a 12 V Zener diode?

No - BZX384-C11F has a nominal 11 V Zener voltage with ±5 % tolerance (10.4–11.6 V range), falling outside the 12 V specification. Substituting it for a 12 V part risks undershoot in regulation or clamping thresholds, potentially causing system malfunction in voltage-critical circuits.

How does the SOD323 package affect thermal performance compared to DO-35?

The SOD323 package has significantly higher thermal resistance (415 K/W junction-to-ambient) than DO-35 (~200 K/W), limiting power dissipation in still-air environments. This requires strict derating above 25 °C ambient and makes it unsuitable for >100 mW continuous operation without PCB copper pour or forced airflow.

Is BZX384-C11F suitable for automotive applications?

No - the BZX384-C11F is not automotive-qualified. Nexperia explicitly states in Revision History that BZX384 series products changed to non-automotive qualification in Rev. 4; automotive alternatives require the -Q suffix (e.g., BZX384-C11F-Q) and separate AEC-Q200 validation.

BZX384-C11F Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BZX384

Package/Case:: SC-76, SOD-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 11 V

Tolerance:: ±5%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 20 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 8 V

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 100 mA

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-323

BZX384-C11F FAQ

1.How can I place an order for BZX384-C11F through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX384-C11F 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 BZX384-C11F reliable?

The price and inventory of BZX384-C11F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-C11F is usually 5 days.

3.What payment methods are accepted for BZX384-C11F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C11F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX384-C11F?

BZX384-C11F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX384-C11F 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 BZX384-C11F?

For technical support, including BZX384-C11F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C11F requirements.

6.How does Aetrix verify that BZX384-C11F is sourced from the original manufacturer or authorized distributors?

All BZX384-C11F 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 BZX384-C11F meets industry standards.

7.What is the process for return or replacement of BZX384-C11F?

All BZX384-C11F units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C11F, 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 BZX384-C11F part is unused and in its original packaging.

Return procedure for BZX384-C11F:

1.Submit a request within 90 days.

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

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