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Diodes Incorporated BZX84C11Q-7-F
- Part No.:
- BZX84C11Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C11Q-7-F.pdf
- Description:
- DIODE ZENER 11V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,141
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Product details
Overview
BZX84C11Q-7-F from Diodes Incorporated is an automotive-grade 11V Zener diode in SOT23 package, rated for 350mW power dissipation at 25°C ambient, with nominal Zener voltage 11V (10.4–11.6V range), test current 5mA, and maximum Zener impedance 20Ω at IZT. It provides precision voltage regulation in low-power biasing and reference circuits for automotive control modules.
For engineers reviewing the BZX84C11Q-7-F datasheet, BZX84C11Q-7-F pinout, BZX84C11Q-7-F application, or BZX84C11Q-7-F equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (357°C/W), AEC-Q101 qualification, reverse leakage (<0.1µA at 8V), and SOT23 footprint compatibility in space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance (20Ω at 5mA), critical for noise-sensitive analog references.
The device is qualified to AEC-Q101 for automotive use, with operating temperature range –65°C to +150°C and moisture sensitivity level 1. Its matte tin-plated Alloy 42 leadframe guarantees solderability per MIL-STD-202, Method 208, and supports reflow-compatible automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V nominal (10.4–11.6 V range at IZT = 5 mA); defines precise clamping/reference point in voltage regulation circuits |
| Power Dissipation (PD) | 350 mW at TA = 25°C; sets maximum continuous power handling before thermal derating begins |
| Zener Impedance (ZZT) | 20 Ω max at IZT = 5 mA; determines output voltage stability under small-signal AC load variations |
| Reverse Leakage (IR) | 0.1 µA max at VR = 8 V; ensures minimal quiescent current draw in high-impedance bias networks |
| Thermal Resistance (RθJA) | 357 °C/W (free-air); quantifies junction-to-ambient temperature rise per watt - critical for thermal design margin |
| Temperature Coefficient | +5.4 mV/°C; enables predictable voltage drift compensation in temperature-varying environments |
Pinout & Package
Package: SOT23 - surface-mount, 3-terminal plastic case with UL 94V-0 flammability rating, 0.008 g mass, and matte tin finish on Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground path | Connected to circuit ground or lower-potential node during Zener operation; polarity must match schematic symbol |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Provides stable 11V reference when reverse-biased; connects to load or feedback network |
| No-Connect (Pin 3) | Internal die attachment pad (non-functional) | Electrically isolated; no external connection required - standard SOT23 mechanical support pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood applications including engine control units and body electronics |
| Green, halogen-free construction | Meets RoHS 3 (2015/863/EU) with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - supports eco-compliance programs |
| Low Zener impedance (20Ω) | Minimizes output voltage variation under ±1 mA load transients - improves ADC reference accuracy |
| SOT23 footprint compatibility | Enables drop-in replacement in legacy designs using industry-standard 2.4 mm × 1.3 mm land pattern |
| Moisture Sensitivity Level 1 | Eliminates bake requirements prior to reflow - reduces manufacturing cycle time and cost |
Applications
| Automotive Engine Control Unit (ECU) Biasing | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Providing stable 11V reference for microcontroller reset circuitry and analog front-end biasing in ECU modules exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting LDO inputs and MCU VREF pins. Use Value: Maintains 11V ±0.6V regulation across –40°C to +125°C, enabling reliable reset assertion and ADC linearity within AEC-Q100 Grade 2 limits. |
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed sensor bridge supply independent of rail fluctuations. Use Value: Delivers <0.1% voltage drift over 1000-hour life at 85°C, reducing sensor offset error by up to 12 LSB in 16-bit measurement systems. |
| Consumer Power Adapter Feedback Network | Medical Diagnostic Instrument Reference |
|
Use Scenario: Setting secondary-side feedback threshold in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Zener element in optocoupler feedback loop controlling TL431 reference voltage. Use Value: Enables ±1.5% output voltage tolerance across line/load/transient conditions while meeting IEC 62368-1 creepage requirements via SOT23 isolation. |
Use Scenario: Generating calibrated reference for ECG amplifier gain stages in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise voltage reference source for instrumentation amplifier biasing and DAC output scaling. Use Value: Contributes <0.8 µVpp broadband noise (10 Hz–100 kHz), preserving >92 dB SNR in 24-bit delta-sigma ADC signal chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5242BT1G | 12V nominal Zener, 500mW PD, 30Ω ZZT, SOD-123 package | Higher power and voltage; requires larger PCB area and different thermal layout | Select when higher power margin or 12V regulation is needed; not AEC-Q101 qualified |
| BZX84-C11-E3-08 | Same 11V Zener, 350mW, but industrial-grade (non-automotive), no AEC-Q101 certification | Lacks automotive qualification; unsuitable for under-hood or safety-critical functions | Acceptable for cost-sensitive consumer applications where AEC-Q101 is not mandated |
Compared with MMSZ5242BT1G and BZX84-C11-E3-08, BZX84C11Q-7-F uniquely combines AEC-Q101 compliance, tight 11V tolerance, and SOT23 footprint - making it the only choice for space-constrained automotive voltage references requiring zero qualification overhead.
Availability
BZX84C11Q-7-F is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor interfaces, and medical diagnostic instrument reference circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX84C11Q-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.
BZX84C11Q-7-F belongs to the BZX84C series of automotive Zener diodes, designed specifically to meet AEC-Q101 requirements for voltage reference and overvoltage protection in harsh-environment electronic control modules.
FAQ
What is the maximum reverse voltage (VR) this Zener can withstand without breakdown?
The BZX84C11Q-7-F has a specified reverse voltage (VR) of 9.0 V at which reverse leakage is guaranteed ≤0.1 µA. Breakdown occurs at the nominal Zener voltage of 11 V (10.4–11.6 V range) under 5 mA test current. Operation below 9.0 V ensures negligible leakage; sustained bias above 11.6 V risks exceeding power limits unless current is strictly limited.
Is this part suitable for use in a 12V automotive battery monitoring circuit?
Yes - the BZX84C11Q-7-F is rated for operation up to +150°C junction temperature and qualified to AEC-Q101, making it appropriate for direct connection to 12V battery rails. Its 11V Zener voltage provides safe headroom against typical 13.8–14.4V charging voltages, and its 0.1 µA leakage at 8V ensures minimal loading on sensing dividers.
How does the "Q" suffix in BZX84C11Q-7-F affect packaging or performance?
The "Q" suffix denotes automotive qualification per AEC-Q101 standards and indicates green, halogen-free construction. It does not alter electrical parameters or package dimensions - the SOT23 footprint, Zener voltage, and thermal characteristics remain identical to non-Q variants, but with enhanced reliability testing and traceability documentation.
Can this Zener diode replace a 1N4740A in an existing design?
No - the 1N4740A is a 10W through-hole Zener in DO-41 package with 10V nominal voltage and vastly higher power capability. The BZX84C11Q-7-F is a 350mW surface-mount device with 11V nominal voltage. Direct replacement would cause catastrophic failure under equivalent current loads due to power mismatch and thermal overload.
BZX84C11Q-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:
- ±5.45%
- 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
BZX84C11Q-7-F FAQ
1.How can I place an order for BZX84C11Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C11Q-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 BZX84C11Q-7-F reliable?
The price and inventory of BZX84C11Q-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 BZX84C11Q-7-F is usually 5 days.
3.What payment methods are accepted for BZX84C11Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C11Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C11Q-7-F?
BZX84C11Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C11Q-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 BZX84C11Q-7-F?
For technical support, including BZX84C11Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C11Q-7-F requirements.
6.How does Aetrix verify that BZX84C11Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84C11Q-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 BZX84C11Q-7-F meets industry standards.
7.What is the process for return or replacement of BZX84C11Q-7-F?
All BZX84C11Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C11Q-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 BZX84C11Q-7-F part is unused and in its original packaging.
Return procedure for BZX84C11Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C11Q-7-F Tags
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