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onsemi BZX84C11LT1
- Part No.:
- BZX84C11LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C11LT1.pdf
- Description:
- DIODE ZENER 11V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,591
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Product details
Overview
BZX84C11LT1 from onsemi is a 11 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 20 Ω dynamic impedance at 5 mA test current and 0.1 µA reverse leakage at 8.5 V, used for voltage regulation and reference in space-constrained portable electronics.
For engineers reviewing the BZX84C11LT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, cathode-anode polarity mapping, and direct alternatives for low-power voltage clamping and precision biasing circuits.
Technical Context
The BZX84C11LT1 operates as a two-terminal silicon Zener diode with avalanche breakdown mechanism, delivering stable reverse-biased voltage regulation across −65°C to +150°C junction temperature range. Its 5.4 mV/°C temperature coefficient ensures predictable drift in thermal-varying environments.
Designed for surface-mount assembly on high-density PCBs, it features a no-connection terminal (Pin 2), enabling compact layout while maintaining isolation between anode (Pin 1) and cathode (Pin 3). ESD robustness exceeds 16 kV per Human Body Model, supporting reliable handling in automated production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 11 V nominal, 10.4–11.6 V min–max at 5 mA - defines regulated output voltage under standard test conditions |
| Power Dissipation | 225 mW on FR-5 board at 25°C - sets maximum continuous DC power before thermal derating begins |
| Zener Impedance | 20 Ω max at 5 mA - determines AC voltage variation under changing load current |
| Reverse Leakage | 0.1 µA max at 8.5 V - specifies off-state current that impacts low-power standby accuracy |
| Capacitance | 130 pF max at 0 V, 1 MHz - affects high-frequency noise filtering and signal integrity in RF-adjacent circuits |
| Temp Coefficient | +5.4 mV/°C - quantifies voltage shift per degree Celsius, critical for temperature-stable references |
| ESD Rating | Class 3 (>16 kV HBM) - enables safe handling without external protection in assembly lines |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting body with corrosion-resistant finish, 260°C soldering tolerance for 10 seconds, UL 94 V-0 flammability rating, and cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry point; connects to lower-potential node in reverse-bias regulation configuration |
| 2 | No Connection | Internally unconnected; must remain floating-no PCB trace or pad required |
| 3 | Cathode | Reverse-bias voltage reference node; ties to regulated output or feedback path in shunt regulator |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free Compliant | RoHS-compliant SOT-23 package (G-suffix variant available) supports environmentally regulated manufacturing |
| Tight Thermal Resistance | 556 °C/W junction-to-ambient on FR-5 board enables predictable thermal management in dense layouts |
| High-Density Packaging | 2.8 × 1.2 × 0.95 mm footprint minimizes PCB area usage in handheld and wearable devices |
| Stable Low-Current Regulation | Specified Zener voltage at 1 mA (10.2–11.6 V) and 20 mA (10.4–11.8 V) ensures consistency across operating ranges |
| Controlled Polarity Marking | Cathode band clearly identifies terminal 3, preventing orientation errors during automated placement |
Applications
| Smartphone Power Management | IoT Sensor Biasing |
|---|---|
Use Scenario: Providing stable 11 V reference for battery charge controller IC feedback loop in compact smartphone PMIC modules. IC Role / Device Role / Timing Role: Shunt voltage reference regulating feedback node to maintain precise charging voltage threshold. Use Value: Enables ±5% output voltage accuracy over temperature without external trimming components. | Use Scenario: Supplying calibrated bias voltage to analog front-end of ultra-low-power environmental sensor nodes. IC Role / Device Role / Timing Role: Precision DC reference source for ADC reference input and op-amp offset compensation. Use Value: Delivers 130 pF capacitance and <0.1 µA leakage, minimizing loading on high-impedance sensor outputs. |
| USB-C Port Protection | Industrial PLC Input Conditioning |
Use Scenario: Clamping transient overvoltage on USB-C CC line during hot-plug events in portable docking stations. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp limiting line voltage to 11 V during ESD or surge events. Use Value: Leverages 16 kV HBM ESD rating and 225 mW pulse power handling to absorb IEC 61000-4-2 surges. | Use Scenario: Level-shifting and voltage limiting for 24 V digital input channels in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Input protection element clamping induced transients to safe levels before optocoupler interface. Use Value: Operates reliably from −65°C to +150°C, supporting extended industrial ambient temperature requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5240BLT1 | 10 V nominal, ±5%, 225 mW, same SOT-23 package but higher 25 Ω Zz at 20 mA | Lower regulation voltage; suitable where 10 V reference suffices and tighter 10 V tolerance is acceptable | Select when system requires marginally lower clamping voltage and can accommodate higher dynamic impedance |
| BZX84C10LT1 | 10 V nominal, ±6%, identical thermal and ESD specs, same pinout and marking format (Z9) | Direct voltage step-down alternative with 1 V lower Zener voltage and slightly wider tolerance | Choose for legacy designs migrating from 10 V reference or where 1 V reduction improves headroom in supply rail design |
Compared with BZX84C11LT1, MMBZ5240BLT1 offers lower regulation voltage but higher impedance, while BZX84C10LT1 provides near-identical form-factor compatibility with reduced voltage and relaxed tolerance-both require verification of downstream circuit voltage margin.
Availability
BZX84C11LT1 is available at Aetrix Electronics and suitable for smartphone power management, IoT sensor biasing, USB-C port protection, and industrial PLC input conditioning requiring stable component supply across automotive-grade temperature ranges and high-volume production cycles.
Supply support for BZX84C11LT1 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX84C11LT1 belongs to the BZX84CxxxLT1 series of standard-tolerance Zener diodes engineered for cost-sensitive, space-constrained voltage regulation in portable and high-density electronics.
FAQ
What is the Zener voltage tolerance of BZX84C11LT1?
The BZX84C11LT1 has a ±5% tolerance on its nominal 11 V Zener voltage, meaning the actual breakdown voltage falls between 10.4 V and 11.6 V when tested at 5 mA (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet, and applies specifically to the BZX84C11LT1 variant-not the tighter-tolerance BZX84B series.
Does BZX84C11LT1 have a connection on Pin 2?
No, BZX84C11LT1 has no internal connection on Pin 2. As documented in the "Pinout" section on pages 3 and 7 of the datasheet, Pin 2 is explicitly designated "No Connection." It must remain unconnected on the PCB-neither tied to ground nor routed-to avoid unintended parasitic paths or assembly defects.
What is the maximum power dissipation of BZX84C11LT1 on FR-5 board?
The BZX84C11LT1 is rated for 225 mW total power dissipation on FR-5 board at 25°C ambient temperature, with linear derating of 1.8 mW/°C above that temperature. This value is specified in the "Maximum Ratings" table on page 1 and validated under JEDEC-standard board conditions (1.0 × 0.75 × 0.62 in.), not generic PCB substrates.
Is BZX84C11LT1 RoHS compliant?
Yes, BZX84C11LT1 is RoHS compliant when ordered with the "G" suffix (e.g., BZX84C11LT1G), indicating Pb-free packaging. The base part number BZX84C11LT1 may be leaded unless otherwise specified; however, the "G" variant is the industry-standard RoHS-compliant version referenced in the "Ordering Information" section on page 2 of the datasheet.
What is the reverse leakage current specification for BZX84C11LT1?
The BZX84C11LT1 exhibits a maximum reverse leakage current (IR) of 0.1 µA at VR = 8.5 V, as specified in the Electrical Characteristics table on page 3. This parameter is measured at 25°C ambient and reflects the diode's off-state conduction-critical for low-power battery-operated systems where standby current must be minimized.
BZX84C11LT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- BZX84CxxxLT1
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 225 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 (TO-236)
BZX84C11LT1 FAQ
1.How can I place an order for BZX84C11LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C11LT1 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 BZX84C11LT1 reliable?
The price and inventory of BZX84C11LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C11LT1 is usually 5 days.
3.What payment methods are accepted for BZX84C11LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C11LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C11LT1?
BZX84C11LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C11LT1 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 BZX84C11LT1?
For technical support, including BZX84C11LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C11LT1 requirements.
6.How does Aetrix verify that BZX84C11LT1 is sourced from the original manufacturer or authorized distributors?
All BZX84C11LT1 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 BZX84C11LT1 meets industry standards.
7.What is the process for return or replacement of BZX84C11LT1?
All BZX84C11LT1 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C11LT1, 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 BZX84C11LT1 part is unused and in its original packaging.
Return procedure for BZX84C11LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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