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Diodes Incorporated BZX84B11-7-F
- Part No.:
- BZX84B11-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84B11-7-F.pdf
- Description:
- DIODE ZENER 11V 350MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:888
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Product details
Overview
BZX84B11-7-F from Diodes Incorporated is a precision 11 V ±2% tolerance Zener diode in SOT23 package, rated for 350 mW power dissipation at 25°C ambient, with 20 Ω maximum Zener impedance at 5 mA test current and 0.1 µA maximum reverse leakage at 8 V, used for voltage regulation and reference in low-power analog circuits.
For engineers reviewing the BZX84B11-7-F datasheet, BZX84B11-7-F pinout, BZX84B11-7-F application, or BZX84B11-7-F equivalent, key selection criteria include tight 11 V nominal Zener voltage tolerance, low dynamic impedance, AEC-Q101 qualification for automotive use, and compatibility with automated SMT assembly on FR-4 PCBs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 11 V nominal Zener voltage is specified at 5 mA test current (IZT), with 20 Ω dynamic impedance (ZZT) and 150 Ω knee impedance (ZZK) at 1 mA, ensuring predictable regulation performance.
Thermal resistance is 357 °C/W when terminals are held at ambient temperature, enabling reliable operation up to +150°C junction temperature. The device exhibits a positive temperature coefficient of +5.4 mV/°C near 11 V, supporting stable biasing in temperature-sensitive analog references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.0 V nominal, 10.8–11.2 V range at 5 mA - ensures precise voltage clamping within ±2% tolerance |
| Power Dissipation (PD) | 350 mW at TA = 25°C - supports continuous regulation in compact SOT23 footprint without forced cooling |
| Zener Impedance (ZZT) | 20 Ω max at 5 mA - minimizes output voltage variation under load transients |
| Reverse Leakage (IR) | 0.1 µA max at VR = 8.0 V - preserves low quiescent current in battery-powered reference circuits |
| Temperature Coefficient | +5.4 mV/°C at 11 V - enables predictable drift compensation in temperature-stable references |
| Junction-to-Ambient RθJA | 357 °C/W - defines thermal derating curve for safe operation on standard FR-4 PCBs |
Pinout & Package
Package: SOT23 - surface-mount plastic case with matte tin-plated alloy 42 leadframe, moisture sensitivity level 1, UL 94V-0 flammability rating, and 0.008 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground | Connected to circuit ground or lower-potential node during Zener operation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Provides stable 11 V reference relative to anode; polarity marked on top surface |
| Collector / NC (Pin 3) | Internal die attachment pad / non-connected | Electrically isolated; serves mechanical support and thermal path only |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables high-accuracy voltage references without post-calibration in production |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HAST, and ESD testing |
| Lead-free & halogen-free "Green" construction | Meets RoHS 3 (2015/863/EU) and JEDEC J-STD-020 moisture sensitivity Level 1 |
| SOT23 package with solderable matte tin finish | Ensures robust reflow yield in automated assembly and long-term intermetallic stability |
Applications
| Automotive Sensor Biasing | Industrial Analog Reference |
|---|---|
Use Scenario: Providing stable 11 V bias to pressure and temperature sensor ICs in engine control modules. IC Role / Device Role / Timing Role: Precision voltage reference for ADC input scaling and sensor excitation. Use Value: Maintains <±0.22 V regulation error over temperature and supply variation, meeting ASIL-B functional safety margin requirements. |
Use Scenario: Generating fixed reference for 12-bit SAR ADCs in programmable logic controllers. IC Role / Device Role / Timing Role: Low-drift DC reference source replacing larger TO-92 Zeners in space-constrained I/O modules. Use Value: Delivers 20 Ω dynamic impedance and +5.4 mV/°C TC, enabling <0.05% full-scale error drift over –40°C to +125°C. |
| USB-C Power Negotiation | Low-Power IoT Voltage Clamp |
Use Scenario: Clamping CC line voltage during USB PD communication handshake in portable chargers. IC Role / Device Role / Timing Role: Overvoltage protection element limiting CC pin to 11 V during fault conditions. Use Value: Responds within nanoseconds to transient overvoltage while drawing <0.1 µA standby current, preserving battery life. |
Use Scenario: Regulating supply to BLE SoCs and environmental sensors in coin-cell–powered wearables. IC Role / Device Role / Timing Role: Primary voltage regulator for 3.3 V LDO input rail derived from single-cell Li-ion. Use Value: Enables 350 mW dissipation in 2.9 mm × 1.3 mm footprint, reducing board area by 65% vs. TO-236 alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4685-7-F | 11 V nominal, ±5% tolerance, 500 mW rating, SOD-123 package | Higher power but looser tolerance; requires larger PCB footprint | Select when higher surge energy handling is required and ±2% accuracy is not critical |
| BZX84-C11 | 11 V nominal, ±5% tolerance, same SOT23 package, non-AEC-Q101 | Lacks automotive qualification; lower cost for commercial-grade designs | Select for consumer electronics where AEC-Q101 compliance and tight tolerance are unnecessary |
Compared with MMSZ4685-7-F and BZX84-C11, BZX84B11-7-F uniquely delivers ±2% voltage accuracy, AEC-Q101 qualification, and 350 mW dissipation in SOT23-making it optimal for automotive and industrial analog references where precision and reliability are non-negotiable.
Availability
BZX84B11-7-F is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog reference design, and low-power IoT voltage clamp applications requiring stable component supply and full traceability.
Supply support for BZX84B11-7-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
BZX84B series belongs to Diodes' precision Zener diode product line, engineered specifically for high-reliability voltage regulation and reference in automotive, industrial, and communications systems demanding tight tolerance and AEC-Q101 compliance.
FAQ
What is the maximum reverse voltage before breakdown for BZX84B11-7-F?
The BZX84B11-7-F has a nominal Zener voltage of 11.0 V, with guaranteed breakdown occurring between 10.8 V and 11.2 V at 5 mA test current. It does not conduct significantly below 10.8 V, maintaining <0.1 µA leakage at 8.0 V reverse bias per datasheet specification.
Can BZX84B11-7-F be used in place of BZX84-C11 in existing designs?
Yes, but with trade-offs: BZX84B11-7-F offers ±2% tolerance and AEC-Q101 qualification versus BZX84-C11's ±5% and commercial-only rating. Electrical pinout and SOT23 footprint are identical, but thermal derating and long-term stability differ due to tighter process control and qualification testing.
What is the recommended PCB pad layout for reliable reflow soldering?
Diodes Incorporated specifies a SOT23 pad layout with 0.8 mm pad width (X), 1.35 mm pad length (X1), 0.9 mm spacing (Y), and 2.9 mm overall length (Y1). This layout ensures proper solder fillet formation, thermal relief, and coplanarity control during reflow, minimizing tombstoning risk.
Does BZX84B11-7-F support bidirectional ESD protection?
No - BZX84B11-7-F is a unidirectional Zener diode optimized for reverse-bias voltage regulation. It lacks symmetric clamping characteristics and is not rated for IEC 61000-4-2 ESD events. For bidirectional protection, dedicated TVS diodes such as D24Z11M2LP should be used instead.
BZX84B11-7-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:
- 350 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84B11-7-F FAQ
1.How can I place an order for BZX84B11-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B11-7-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 BZX84B11-7-F reliable?
The price and inventory of BZX84B11-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84B11-7-F is usually 5 days.
3.What payment methods are accepted for BZX84B11-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B11-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B11-7-F?
BZX84B11-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B11-7-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 BZX84B11-7-F?
For technical support, including BZX84B11-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B11-7-F requirements.
6.How does Aetrix verify that BZX84B11-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84B11-7-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 BZX84B11-7-F meets industry standards.
7.What is the process for return or replacement of BZX84B11-7-F?
All BZX84B11-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B11-7-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 BZX84B11-7-F part is unused and in its original packaging.
Return procedure for BZX84B11-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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