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Diodes Incorporated BZX84C11-7
- Part No.:
- BZX84C11-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C11-7.pdf
- Description:
- DIODE ZENER 11V 300MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,849
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Product details
Overview
BZX84C11-7 from Diodes Incorporated is a 350mW surface-mount Zener diode with a nominal zener voltage of 11V (10.4–11.6V range at 5mA test current), 20Ω maximum zener impedance at 5mA, and 0.1µA maximum reverse leakage at 8V. It uses planar die construction in an SOT23 package and is qualified to AEC-Q101 for automotive-grade reliability. It serves as a precision voltage reference or overvoltage clamp in low-power power supply regulation circuits.
For engineers reviewing the BZX84C11-7 datasheet, BZX84C11-7 pinout, BZX84C11-7 application, or BZX84C11-7 equivalent, key selection criteria include its 11V zener tolerance, thermal resistance of 357°C/W (with terminals at ambient), 150°C max junction temperature, and compatibility with automated SMT assembly on FR-4 PCBs.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified test current of 5mA and exhibits a positive temperature coefficient of +5.4mV/°C near 11V. Its low 0.1µA reverse current at 8V enables high-impedance biasing in sensing and reference circuits.
The device's 350mW power rating is valid under free-air conditions with terminals held at ambient temperature; derating begins above 25°C per the published curve. Its SOT23 package supports compact layout and meets IPC/JEDEC moisture sensitivity level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11V nominal (10.4–11.6V range at IZT = 5mA); defines stable clamping/reference point in regulation loops |
| Power Dissipation (PD) | 350mW at TA = 25°C with terminals at ambient; sets maximum continuous dissipation without heatsinking |
| Zener Impedance (ZZT) | 20Ω max at 5mA; determines output voltage stability under varying load current |
| Reverse Leakage (IR) | 0.1µA max at VR = 8V; ensures minimal error current in high-impedance reference paths |
| Thermal Resistance (RθJA) | 357°C/W; defines junction-to-ambient temperature rise per watt under specified mounting conditions |
| Operating Temperature | –65°C to +150°C; supports industrial and automotive under-hood environments |
| Package | SOT23; 3-pin surface-mount outline with standard 0.915mm lead pitch and 2.4mm body length |
Pinout & Package
Package: SOT23 - molded plastic case, UL 94V-0 rated, matte tin-plated alloy 42 leadframe, polarity indicated by cathode band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / reference ground node | Connected to circuit ground or lower-potential rail when used in shunt regulation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to input voltage source via series resistor; provides stable 11V reference at this node |
| No-Connect (Pin 3) | Internal die attach pad / mechanical support | Not electrically connected to die; serves thermal and mechanical anchoring function only |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight zener voltage tolerance and stable long-term parametric drift under thermal cycling |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control modules and body electronics |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900ppm Br, <900ppm Cl, <1000ppm Sb; suitable for green manufacturing |
| Moisture Sensitivity Level 1 | Allows unlimited floor life before reflow; eliminates bake requirements in SMT production |
| Automated assembly optimized | Standard SOT23 footprint and marking enable high-yield pick-and-place and AOI inspection |
Applications
| Power Supply Voltage Reference | Overvoltage Clamp Circuit |
|---|---|
|
Use Scenario: Providing stable 11V reference for feedback loop in isolated DC-DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Shunt voltage reference diode establishing precise error amplifier input threshold. Use Value: Maintains ±1.1V regulation accuracy across –40°C to +125°C ambient with <0.5% line/load transient deviation. |
Use Scenario: Protecting microcontroller I/O pins against ESD-induced transients exceeding 12V. IC Role / Device Role / Timing Role: Fast-acting voltage clamp diverting surge current away from sensitive logic inputs. Use Value: Limits pin voltage to ≤11.6V during 8kV HBM events while sustaining <0.1µA standby leakage. |
| Temperature-Compensated Bias Network | Low-Power Sensor Excitation |
|
Use Scenario: Generating temperature-stable bias current for analog front-end amplifiers in industrial sensor nodes. IC Role / Device Role / Timing Role: Zener-based current source with +5.4mV/°C TC partially offsetting transistor VBE drift. Use Value: Delivers <±2% current variation over –25°C to +85°C without active compensation circuitry. |
Use Scenario: Supplying excitation voltage to resistive temperature detectors (RTDs) in battery-powered IoT devices. IC Role / Device Role / Timing Role: Low-quiescent-current voltage source powering 100Ω–1kΩ RTD elements. Use Value: Draws only 0.1µA standby current while delivering 11V ±0.6V to RTD bridge with <0.01% nonlinearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5240BS-7-F | Zener voltage 10V (9.5–10.5V), 225mW rating, 30Ω ZZT, SOT23 package | Lower voltage and power; suited for 10V systems with tighter board space constraints | Select when 10V reference suffices and thermal margin is limited |
| BZX84-C11,115 | Same 11V rating and SOT23 package, but Nexperia variant with 250mW PD, 25Ω ZZT, and different AEC-Q101 test profile | Higher process variability; requires validation for automotive safety-critical functions | Prefer for cost-sensitive non-safety designs where Diodes' AEC-Q101 traceability is not required |
Compared with MMBZ5240BS-7-F and BZX84-C11,115, the BZX84C11-7 delivers superior thermal robustness (350mW vs. 225–250mW), tighter zener impedance (20Ω vs. 25–30Ω), and full AEC-Q101 documentation traceability-making it optimal for automotive and industrial power management where long-term voltage stability is critical.
Availability
BZX84C11-7 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor signal conditioning, and consumer power adapter voltage reference applications requiring stable component supply and AEC-Q101 compliance.
Supply support for BZX84C11-7 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 and manufacturing operations across Asia and the Americas.
The BZX84 series belongs to Diodes' general-purpose Zener diode product line, engineered for precision voltage regulation and protection in cost-sensitive, high-volume applications such as power supplies, voltage references, and overvoltage clamps.
FAQ
What is the maximum power dissipation of BZX84C11-7 under standard mounting conditions?
The BZX84C11-7 has a maximum power dissipation of 350mW when mounted with terminals held at ambient temperature (per Note 7). When soldered to an FR-4 PCB using Diodes' recommended pad layout, its derated power drops to 300mW at 25°C ambient (per Note 6), decreasing linearly to zero at 150°C ambient.
How does the temperature coefficient affect voltage regulation accuracy over temperature?
The BZX84C11-7 has a temperature coefficient of +5.4mV/°C at 11V. Over a –40°C to +125°C junction temperature range, this results in a total zener voltage shift of approximately ±0.89V (±8.1%), which must be accounted for in precision reference designs. For tighter stability, use in conjunction with negative-TC components or active compensation.
Is BZX84C11-7 suitable for use in automotive applications?
Yes-the BZX84C11-7 is qualified to AEC-Q101 standards and manufactured with green molding compound (date code V9 and newer). It supports operating temperatures from –65°C to +150°C and is approved for use in engine control units, body control modules, and infotainment power rails where 11V clamping or referencing is required.
What is the meaning of the "-7" suffix in the part number BZX84C11-7?
Per Diodes' ordering information, the "-7" suffix denotes standard-grade (non-automotive) packaging in 3,000-unit tape-and-reel format. The "Q-7" variant would indicate automotive-grade qualification, while "-13" and "Q-13" denote 10,000-unit reels. The "-7" version retains full AEC-Q101 qualification but is marked and shipped for general industrial use.
BZX84C11-7 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:
- Discontinued at Digi-Key
- 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:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84C11-7 FAQ
1.How can I place an order for BZX84C11-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C11-7 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 BZX84C11-7 reliable?
The price and inventory of BZX84C11-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C11-7 is usually 5 days.
3.What payment methods are accepted for BZX84C11-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C11-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C11-7?
BZX84C11-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C11-7 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 BZX84C11-7?
For technical support, including BZX84C11-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C11-7 requirements.
6.How does Aetrix verify that BZX84C11-7 is sourced from the original manufacturer or authorized distributors?
All BZX84C11-7 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 BZX84C11-7 meets industry standards.
7.What is the process for return or replacement of BZX84C11-7?
All BZX84C11-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C11-7, 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 BZX84C11-7 part is unused and in its original packaging.
Return procedure for BZX84C11-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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