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onsemi BZX84C9V1LT3
- Part No.:
- BZX84C9V1LT3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C9V1LT3.pdf
- Description:
- DIODE ZENER 9.1V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,116
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Product details
Overview
BZX84C9V1LT3 from onsemi is a 9.1 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation at 25°C on FR-5 board, with 15 Ω dynamic impedance at 5 mA test current and 0.5 µA reverse leakage at 7.3 V, used for voltage regulation in space-constrained portable electronics.
For engineers reviewing the BZX84C9V1LT3 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating data, SOT-23 terminal mapping, ESD robustness (Class 3, >16 kV HBM), and direct alternative options for low-power voltage reference design.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output by conducting reverse current above its specified Zener breakdown voltage of 9.1 V (min 8.5 V, max 9.6 V at 5 mA). Its temperature coefficient is +3.8 mV/°C, indicating positive drift with rising junction temperature.
The SOT-23 package features pin 1 (anode), pin 2 (no connection), and pin 3 (cathode), with thermal resistance of 556 °C/W on FR-5 board and 417 °C/W on alumina substrate. It supports automated placement and reflow soldering up to 260°C for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 9.1 V nominal (8.5–9.6 V range at 5 mA); sets precise clamping level for overvoltage protection or reference generation |
| Power Dissipation | 225 mW on FR-5 board at 25°C; derates linearly at 1.8 mW/°C above ambient |
| Zener Impedance | 15 Ω max at 5 mA; ensures minimal output voltage variation under load transients |
| Reverse Leakage | 0.5 µA max at 7.3 V; guarantees low standby current in battery-powered circuits |
| Capacitance | 130 pF at 0 V, 1 MHz; impacts high-frequency noise filtering capability in signal path applications |
| ESD Rating | Class 3 (>16 kV) per Human Body Model; enables robust handling in manual assembly and end-use environments |
| Temp Coefficient | +3.8 mV/°C at 5 mA; quantifies voltage drift across industrial temperature range (−65°C to +150°C) |
Pinout & Package
SOT-23 (Case 318, Style 8) surface-mount package with void-free thermosetting plastic body, corrosion-resistant finish, UL 94 V-0 flammability rating, and cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during regulation |
| 2 | No Connection | Internally unconnected; must remain floating-no PCB trace or pad required |
| 3 | Cathode | Connected to regulated voltage rail; carries full Zener current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free Compliant | RoHS-compliant packaging available (G-suffix variants); meets global environmental directives without performance trade-off |
| High-Density Mounting | Small footprint (2.80 × 1.20 × 0.99 mm) enables use on compact PCBs where space is constrained |
| Automated Assembly Optimized | Transfer-molded case geometry and lead coplanarity support reliable pick-and-place and reflow soldering |
| Tight Thermal Management | Specified maximum soldering temperature (260°C/10 s) ensures compatibility with standard lead-free reflow profiles |
| Stable Low-Voltage Reference | ±5% tolerance and +3.8 mV/°C TC enable predictable regulation in consumer-grade voltage monitoring circuits |
Applications
| Smartphone Power Management | IoT Sensor Node Regulation |
|---|---|
Use Scenario: Regulating bias voltage for RF front-end ICs and PMICs in LTE/5G handsets where board area is at premium. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 9.1 V supply rail for analog subsystems. Use Value: Enables consistent RF amplifier gain and ADC reference accuracy despite battery voltage sag from 4.2 V to 3.0 V. | Use Scenario: Providing precision reference for low-power microcontroller ADC inputs in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Passive voltage clamp ensuring sensor signal conditioning circuitry remains within safe operating range. Use Value: Maintains <0.5 µA leakage at 7.3 V, extending coin-cell battery life beyond 5 years in sleep-mode operation. |
| USB-C Port Protection | Industrial PLC Input Conditioning |
Use Scenario: Clamping transient overvoltage on USB-C CC lines during hot-plug events to prevent controller damage. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing ESD pulses per IEC 61000-4-2 Level 4. Use Value: Leverages Class 3 (>16 kV HBM) ESD rating to eliminate need for external TVS diodes in cost-sensitive designs. | Use Scenario: Stabilizing 24 V DC input rails in programmable logic controller digital I/O modules exposed to industrial noise. IC Role / Device Role / Timing Role: Low-impedance shunt regulator suppressing common-mode spikes on field-side power rails. Use Value: 15 Ω dynamic impedance limits voltage excursion to <0.15 V under 10 mA surge, preserving logic-level integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C9V1LT1 | Identical electrical specs; differs only in tape-and-reel packaging (3,000 vs. 10,000 units/reel) | Same functional use; suited for lower-volume prototyping or small-batch production | Select when smaller reel size aligns with consumption rate or inventory control policy |
| BZX84B9V1LT1 | Tighter ±1% Zener tolerance (vs. ±5%), same 9.1 V nominal, 15 Ω ZZT, and 0.5 µA IR | Better voltage stability required in precision reference or calibration circuits | Choose when system-level accuracy demands tighter initial tolerance, accepting higher unit cost |
Compared with BZX84C9V1LT3, the LT1 variant offers identical performance in a smaller reel format ideal for R&D, while the B-series alternative trades wider tolerance for enhanced precision-critical in metrology-grade references but unnecessary for general-purpose clamping.
Availability
BZX84C9V1LT3 is available at Aetrix Electronics and suitable for smartphone power management, IoT sensor node regulation, and USB-C port protection requiring stable component supply with full traceability and lifecycle continuity.
Supply support for BZX84C9V1LT3 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The BZX84 series is part of onsemi's broad portfolio of discrete Zener regulators designed specifically for space-constrained, low-power voltage reference and overvoltage protection in portable and high-density electronics.
FAQ
What is the Zener voltage tolerance for BZX84C9V1LT3?
The BZX84C9V1LT3 has a nominal Zener voltage of 9.1 V with a tolerance of ±5%, meaning the actual breakdown voltage falls between 8.5 V and 9.6 V when tested at 5 mA. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official datasheet and applies specifically to the "C" series (standard tolerance) variant of the BZX84 family.
Does BZX84C9V1LT3 have a functional pin 2 connection?
No, pin 2 of the BZX84C9V1LT3 is internally not connected (NC) and must remain unattached on the PCB. The device functions solely as a two-terminal Zener diode between pin 1 (anode) and pin 3 (cathode), as explicitly stated in the Pinout section of the datasheet and confirmed in the Package Dimensions diagram on page 7.
What is the maximum allowable soldering temperature for BZX84C9V1LT3?
The maximum case temperature for soldering the BZX84C9V1LT3 is 260°C for up to 10 seconds, as specified in the Mechanical Characteristics section. This limit ensures reliability during lead-free reflow processes and is validated for the SOT-23 package's thermosetting plastic construction and corrosion-resistant finish.
How does the temperature coefficient affect BZX84C9V1LT3 performance?
The BZX84C9V1LT3 has a temperature coefficient of +3.8 mV/°C at 5 mA, meaning its Zener voltage increases by approximately 3.8 mV for every 1°C rise in junction temperature. This positive drift is typical for Zeners above ~6 V and must be accounted for in designs operating across −65°C to +150°C ambient ranges.
Can BZX84C9V1LT3 replace BZX84C9V1LT1 in existing designs?
Yes, BZX84C9V1LT3 is functionally identical to BZX84C9V1LT1 in all electrical, thermal, and mechanical specifications-the only difference is packaging: LT3 denotes 10,000-unit tape-and-reel versus LT1's 3,000-unit reel. No PCB layout or schematic changes are needed when substituting BZX84C9V1LT3 for BZX84C9V1LT1.
BZX84C9V1LT3 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):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 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)
BZX84C9V1LT3 FAQ
1.How can I place an order for BZX84C9V1LT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C9V1LT3 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 BZX84C9V1LT3 reliable?
The price and inventory of BZX84C9V1LT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C9V1LT3 is usually 5 days.
3.What payment methods are accepted for BZX84C9V1LT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C9V1LT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C9V1LT3?
BZX84C9V1LT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C9V1LT3 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 BZX84C9V1LT3?
For technical support, including BZX84C9V1LT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C9V1LT3 requirements.
6.How does Aetrix verify that BZX84C9V1LT3 is sourced from the original manufacturer or authorized distributors?
All BZX84C9V1LT3 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 BZX84C9V1LT3 meets industry standards.
7.What is the process for return or replacement of BZX84C9V1LT3?
All BZX84C9V1LT3 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C9V1LT3, 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 BZX84C9V1LT3 part is unused and in its original packaging.
Return procedure for BZX84C9V1LT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C9V1LT3 Tags
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