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

Diodes Incorporated BZX84B11Q-7-F

Name: BZX84B11Q-7-F
Brand: Diodes Incorporated
SKU: BZX84B11Q-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84B11Q-7-F

Manufacturer:: Diodes Incorporated

Category:: Single Zener Diodes

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

Datasheet:: BZX84B11Q-7-F.pdf

Description:: DIODE ZENER 11V 300MW SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:3,454

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Product details

Overview

BZX84B11Q-7-F from Diodes Incorporated is an AEC-Q101-qualified surface-mount precision Zener diode with nominal 11 V zener voltage (±2% tolerance), 350 mW power dissipation, and 20 Ω maximum zener impedance at 5 mA test current. It operates across –65 °C to +150 °C and serves as a stable voltage reference or overvoltage clamp in automotive power management circuits.

For engineers reviewing the BZX84B11Q-7-F datasheet, BZX84B11Q-7-F pinout, BZX84B11Q-7-F application, or BZX84B11Q-7-F equivalent, key selection criteria include its ±2% V_Z tolerance, low 0.1 µA reverse leakage at 8 V, +5.4 mV/°C temperature coefficient, SOT23 package compatibility, and automotive qualification for under-hood sensing and ECU biasing.

Technical Context

This Zener diode delivers precision regulation via sharp reverse-breakdown characteristics at I_ZT = 5 mA, with low dynamic impedance (20 Ω) ensuring minimal output voltage variation under load transients. Its thermal resistance of 357 °C/W (junction-to-ambient, terminals at ambient) supports reliable operation in compact automotive PCB layouts.

The device exhibits a positive temperature coefficient of +5.4 mV/°C near 11 V, enabling predictable drift compensation in temperature-sensitive references. Reverse leakage remains ≤0.1 µA at VR = 8.0 V, supporting low-power standby circuit integrity in always-on vehicle modules.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	11.0 V nominal, 10.8–11.2 V range at 5 mA - enables tight voltage clamping in 12 V automotive systems
Power Dissipation (P_D)	350 mW - supports continuous regulation without heatsinking in SOT23 footprint
Zener Impedance (Z_ZT)	20 Ω max at 5 mA - ensures <±22 mV output shift for ±0.5 mA load change
Reverse Leakage (I_R)	≤0.1 µA at 8.0 V - preserves battery life in low-current monitoring circuits
Temperature Coefficient	+5.4 mV/°C - allows predictable V_Z drift compensation in engine control units
Operating Temperature	–65 °C to +150 °C - meets under-hood thermal requirements per AEC-Q101
Package	SOT23 - enables high-density placement and compatibility with standard pick-and-place equipment

Pinout & Package

Package: SOT23 - three-terminal surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, and moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Forward conduction terminal / cathode reference ground	Connected to system ground or lower-potential node during Zener operation
Cathode (Pin 2)	Zener breakdown terminal / regulated output node	Provides stable 11 V reference when reverse-biased above breakdown threshold
NC / Dummy (Pin 3)	Non-connected internal lead frame extension	No electrical function; improves mechanical stability and thermal path in SOT23 mold

Key Features

Feature	Design Value
±2% Zener voltage tolerance	Reduces need for post-assembly calibration in automotive sensor bias networks
AEC-Q101 qualification	Validates reliability for automotive powertrain and body electronics applications
Lead-free, halogen-free "Green" construction	Meets RoHS 3 (2015/863/EU) and automotive environmental compliance mandates
350 mW dissipation in SOT23	Enables robust voltage clamping without derating in ambient temperatures up to 125 °C

Applications

Automotive Engine Control Unit (ECU) Biasing

Industrial Sensor Signal Conditioning

Use Scenario: Providing stable 11 V reference for microcontroller ADC reference and op-amp bias rails in engine control modules.

IC Role / Device Role / Timing Role: Precision voltage reference and supply rail clamp.

Use Value: ±2% V_Z tolerance and +5.4 mV/°C TC ensure <±3% total reference error across –40 °C to +125 °C operating range.

Use Scenario: Regulating excitation voltage for bridge-based pressure and temperature sensors in factory automation systems.

IC Role / Device Role / Timing Role: Low-drift analog voltage reference source.

Use Value: 20 Ω zener impedance maintains <±10 mV output deviation under 0.1–5 mA load variations typical of sensor bridges.

Automotive Infotainment Power Sequencing

Medical Diagnostic Equipment Protection

Use Scenario: Clamping 12 V supply rail transients during ignition switching in head unit power domains.

IC Role / Device Role / Timing Role: Overvoltage protection element.

Use Value: 350 mW rating and fast 10 ns response suppress >15 V spikes without degradation over 100,000 cycles.

Use Scenario: Safeguarding low-power analog front-end inputs in portable ultrasound and ECG devices.

IC Role / Device Role / Timing Role: Input-stage transient suppressor and DC level shifter.

Use Value: ≤0.1 µA reverse leakage prevents signal path loading in high-impedance biopotential amplifiers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMSZ4685-TP (Micro Commercial)	11 V nominal, ±5% tolerance, 500 mW P_D, SOD-123 package	Higher power but looser tolerance; larger footprint	Select for cost-sensitive industrial designs where ±5% V_Z is acceptable and board space permits SOD-123
BZX84-C11 (Nexperia)	11 V nominal, ±5% tolerance, 300 mW P_D, SOT23 package, no AEC-Q101	Same footprint but non-automotive qualified and higher impedance (40 Ω)	Select for consumer-grade applications requiring SOT23 compatibility without automotive reliability requirements

Compared with MMSZ4685-TP and BZX84-C11, BZX84B11Q-7-F provides tighter ±2% regulation, AEC-Q101 validation, and lower 20 Ω impedance-making it uniquely suitable for safety-critical automotive voltage references where accuracy and long-term stability are mandatory.

Availability

BZX84B11Q-7-F is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and medical diagnostic equipment requiring stable component supply with full traceability and AEC-Q101 compliance.

Supply support for BZX84B11Q-7-F 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.

The BZX84B series belongs to Diodes' precision Zener portfolio, engineered specifically for automotive-grade voltage reference and clamping applications demanding AEC-Q101 qualification, tight tolerances, and robust thermal performance.

FAQ

What is the maximum reverse leakage current for BZX84B11Q-7-F at 8 V?

The maximum reverse leakage current is 0.1 µA at VR = 8.0 V and TA = +25 °C, as specified in the Electrical Characteristics table. This ultra-low leakage ensures minimal current draw in battery-backed or always-on circuits, preserving system standby efficiency without compromising regulation accuracy.

Is BZX84B11Q-7-F compatible with lead-free reflow soldering profiles?

Yes. The device features matte tin-plated leads qualified to MIL-STD-202, Method 208, and is fully RoHS 3 compliant. Its SOT23 package withstands peak reflow temperatures up to 260 °C for 10 seconds, meeting IPC/JEDEC J-STD-020 Level 1 moisture sensitivity requirements without pre-bake.

How does the +5.4 mV/°C temperature coefficient affect circuit design?

This positive coefficient means V_Z increases by 5.4 mV per degree Celsius rise. In temperature-critical applications like engine control, designers must account for this drift-e.g., by pairing with negative-TC components or using lookup-table compensation in firmware-to maintain total reference error within ±3% across –40 °C to +125 °C.

Can BZX84B11Q-7-F replace BZX84-C11 in existing designs?

Electrically, yes-the pinout and basic function match-but BZX84B11Q-7-F offers ±2% tolerance (vs. ±5%), 350 mW rating (vs. 300 mW), and AEC-Q101 qualification. Replacement requires validation of thermal margin and qualification documentation for automotive use; no layout change is needed due to identical SOT23 footprint.

BZX84B11Q-7-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

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

Tolerance:: ±2%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 20 Ohms

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

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

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

BZX84B11Q-7-F FAQ

1.How can I place an order for BZX84B11Q-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84B11Q-7-F 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 BZX84B11Q-7-F reliable?

The price and inventory of BZX84B11Q-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84B11Q-7-F is usually 5 days.

3.What payment methods are accepted for BZX84B11Q-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B11Q-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84B11Q-7-F?

BZX84B11Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84B11Q-7-F 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 BZX84B11Q-7-F?

For technical support, including BZX84B11Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B11Q-7-F requirements.

6.How does Aetrix verify that BZX84B11Q-7-F is sourced from the original manufacturer or authorized distributors?

All BZX84B11Q-7-F 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 BZX84B11Q-7-F meets industry standards.

7.What is the process for return or replacement of BZX84B11Q-7-F?

All BZX84B11Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B11Q-7-F, 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 BZX84B11Q-7-F part is unused and in its original packaging.

Return procedure for BZX84B11Q-7-F:

1.Submit a request within 90 days.

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

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