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onsemi BZX84C10LT1
- Part No.:
- BZX84C10LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C10LT1.pdf
- Description:
- DIODE ZENER 10V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,035
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Product details
Overview
BZX84C10LT1 from onsemi is a 10 V, ±6% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation at 25°C on FR-5 board, with 20 Ω dynamic impedance at 5 mA test current and 0.2 µA reverse leakage at 7.6 V, used for voltage regulation in space-constrained portable electronics.
For engineers reviewing the BZX84C10LT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, cathode-anode terminal mapping, ESD robustness (Class 3, >16 kV HBM), and direct alternatives for low-power reference and protection circuits.
Technical Context
The BZX84C10LT1 operates as a two-terminal voltage reference device with fixed breakdown voltage, relying on controlled avalanche conduction in silicon PN junction under reverse bias. Its nominal Zener voltage is 10 V at 5 mA test current, with temperature coefficient of +4.5 mV/°C and capacitance of 130 pF at 0 V bias and 1 MHz.
Thermal performance is defined by junction-to-ambient thermal resistance of 556 °C/W on FR-5 board, requiring derating to 1.8 mW/°C above 25°C ambient. The device features no internal connection on pin 2, confirming its function as a discrete two-terminal regulator-not a three-terminal IC or active circuit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.4–10.6 V at IZT = 5 mA - defines stable regulation window for precision reference use |
| Power Dissipation | 225 mW on FR-5 board at 25°C - sets maximum continuous DC power before thermal shutdown risk |
| Zener Impedance (ZZT) | 20 Ω at IZT = 5 mA - determines output voltage stability under load transients |
| Reverse Leakage Current | 0.2 µA at VR = 7.6 V - ensures minimal quiescent current in standby regulation |
| Capacitance | 130 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - supports robust handling in manual assembly and field-replaceable modules |
| Operating Temperature | −65°C to +150°C - enables deployment in automotive under-hood and industrial control environments |
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, cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward-biased terminal during conduction; connects to lower-potential node in regulation path |
| 2 | No Connection | Internally unconnected; must remain floating-no PCB trace or pad required |
| 3 | Cathode | Reverse-biased terminal during Zener operation; connects to regulated output node |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free Compliant Packaging | G-suffix variant available per JESD204B; eliminates RoHS compliance risk in global manufacturing |
| Tight Thermal Derating Curve | 1.8 mW/°C reduction above 25°C ambient-enables accurate power budgeting in thermally dense layouts |
| High-Density Mounting Suitability | 0.95 mm × 0.95 mm footprint-fits within 1.2 mm pitch routing on HDI PCBs for smartphones and wearables |
| Controlled Zener Voltage Tolerance | ±6% (9.4–10.6 V) at 5 mA-supports cost-sensitive designs where tight regulation is secondary to size and reliability |
| Low Capacitance at Zero Bias | 130 pF-minimizes signal coupling in high-speed data line clamping applications |
Applications
| Portable Power Rail Clamping | Microcontroller Reset Reference |
|---|---|
Use Scenario: Clamp 12 V supply rail spikes in Bluetooth headset battery charging circuitry. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing transient overvoltage energy. Use Value: Prevents MCU brownout and flash corruption using only 225 mW dissipation margin and 0.2 µA leakage. |
Use Scenario: Provide clean 10 V reference for reset comparator threshold in GPS tracker module. IC Role / Device Role / Timing Role: Stable voltage source defining logic-high reset release point. Use Value: Enables deterministic reset timing across −40°C to +85°C with +4.5 mV/°C TC and 20 Ω ZZT. |
| USB Port ESD Protection | Industrial Sensor Signal Conditioning |
Use Scenario: Supplement TVS diode on USB D+ line in medical thermometer design. IC Role / Device Role / Timing Role: Secondary low-leakage clamp limiting residual voltage after primary ESD event. Use Value: Adds Class 3 (>16 kV HBM) robustness without increasing standby current beyond 0.2 µA. |
Use Scenario: Stabilize excitation voltage for 3.3 kΩ RTD bridge in HVAC controller. IC Role / Device Role / Timing Role: Precision bias source maintaining bridge balance under varying ambient conditions. Use Value: Delivers <±0.5% drift over −25°C to +70°C due to predictable +4.5 mV/°C TC and low ZZT. |
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% tolerance, 225 mW, 17 Ω ZZT at 20 mA, 150 pF | Lower impedance but higher capacitance; tighter tolerance requires tighter layout control | Select when lower dynamic impedance is prioritized over RF coupling sensitivity |
| BZX84C10ET1G | Same 10 V/±6% spec, but in SOT-23-3 with pin 2 internally connected to cathode (not NC) | Alters PCB layout-pin 2 must be routed, not left floating; incompatible with legacy BZX84C10LT1 footprints | Choose only if redesigning for enhanced thermal path via pin 2; not drop-in compatible |
Compared with MMBZ5240BLT1 and BZX84C10ET1G, the BZX84C10LT1 offers optimal balance of leakage (0.2 µA), impedance (20 Ω), and layout simplicity (true NC pin 2), making it preferred for cost-sensitive, space-constrained regulation where moderate tolerance suffices.
Availability
BZX84C10LT1 is available at Aetrix Electronics and suitable for portable power rail clamping, microcontroller reset reference, and USB port ESD protection requiring stable component supply across consumer, industrial, and medical electronics programs.
Supply support for BZX84C10LT1 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, sensing, and connectivity solutions for automotive, industrial, cloud, and IoT markets.
The BZX84C10LT1 belongs to the BZX84CxxxLT1 series of standard-tolerance Zener diodes designed specifically for compact, low-power voltage regulation in high-density portable and battery-powered systems.
FAQ
What is the exact Zener voltage range for BZX84C10LT1 at 5 mA test current?
The BZX84C10LT1 has a guaranteed Zener voltage range of 9.4 V to 10.6 V when measured at IZT = 5 mA and TA = 25°C. This ±6% tolerance reflects the standard-grade specification for the BZX84C series, confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet. The BZX84C10LT1 maintains this range across its full operating temperature span when derated appropriately.
Does BZX84C10LT1 have a functional pin 2, and how should it be handled on the PCB?
No-pin 2 of the BZX84C10LT1 is explicitly designated "No Connection" in the datasheet's marking diagram and package dimensions section. It is internally unconnected and must remain electrically floating on the PCB; no trace, pad, or ground connection is permitted. This distinguishes the BZX84C10LT1 from variants like BZX84C10ET1G, where pin 2 is tied to cathode.
What is the maximum allowable ambient temperature before BZX84C10LT1 power dissipation must be reduced?
The BZX84C10LT1 must begin thermal derating at 25°C ambient temperature. Its 225 mW rating on FR-5 board applies only at TA = 25°C; above that, power must be reduced linearly at 1.8 mW/°C, reaching zero dissipation at approximately 153°C. This derating curve is defined by RJA = 556 °C/W and is non-negotiable for long-term reliability.
Can BZX84C10LT1 be used as a substitute for BZX84C10ET1G in an existing design?
No-BZX84C10LT1 is not a direct substitute for BZX84C10ET1G. While both share identical Zener voltage specs, BZX84C10ET1G connects pin 2 to cathode, whereas BZX84C10LT1 leaves pin 2 unconnected. Using BZX84C10LT1 in a footprint designed for BZX84C10ET1G creates an unintended open circuit on cathode, breaking regulation. Layout redesign is mandatory for interchange.
What is the reverse leakage current specification for BZX84C10LT1, and at what voltage is it measured?
The BZX84C10LT1 specifies a maximum reverse leakage current (IR) of 0.2 µA, measured at VR = 7.6 V (80% of nominal Zener voltage) and TA = 25°C. This value appears in the "Max Reverse Leakage Current" column of the Electrical Characteristics table for the BZX84C10LT1 row and directly informs standby power budgeting in always-on sensor nodes.
BZX84C10LT1 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):
- 10 V
- Tolerance:
- ±6%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 200 nA @ 7 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)
BZX84C10LT1 FAQ
1.How can I place an order for BZX84C10LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C10LT1 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 BZX84C10LT1 reliable?
The price and inventory of BZX84C10LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C10LT1 is usually 5 days.
3.What payment methods are accepted for BZX84C10LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C10LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C10LT1?
BZX84C10LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C10LT1 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 BZX84C10LT1?
For technical support, including BZX84C10LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C10LT1 requirements.
6.How does Aetrix verify that BZX84C10LT1 is sourced from the original manufacturer or authorized distributors?
All BZX84C10LT1 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 BZX84C10LT1 meets industry standards.
7.What is the process for return or replacement of BZX84C10LT1?
All BZX84C10LT1 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C10LT1, 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 BZX84C10LT1 part is unused and in its original packaging.
Return procedure for BZX84C10LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C10LT1 Tags
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