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onsemi SZBZX84C9V1LT3G
- Part No.:
- SZBZX84C9V1LT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C9V1LT3G.pdf
- Description:
- DIODE ZENER 9.1V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:19,462
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Product details
Overview
SZBZX84C9V1LT3G from onsemi is a 9.1 V ±5.5% Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board, with 15 Ω dynamic impedance at 5 mA test current and 0.5 μA reverse leakage at 7.3 V. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the SZBZX84C9V1LT3G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5.5%), thermal coefficient (+3.8 mV/°C), ESD robustness (>16 kV HBM), and automotive-grade AEC-Q101 qualification.
Technical Context
This device operates as a two-terminal voltage regulator using controlled reverse-biased avalanche breakdown. Its nominal 9.1 V Zener voltage is specified at 5 mA test current (IZT), with tight regulation maintained across −65°C to +150°C junction temperature range.
The SOT-23 package features anode (Pin 1), no-connection (Pin 2), and cathode (Pin 3) configuration, enabling unidirectional clamping. Its 130 pF capacitance at 0 V bias and 1 MHz supports stable operation in noise-sensitive signal conditioning paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 9.1 V nominal, min 8.5 V / max 9.6 V at 5 mA - defines regulated output level with ±5.5% tolerance |
| Power Dissipation | 250 mW on FR-5 board - sets maximum continuous clamping energy without derating below 25°C |
| Zener Impedance | 15 Ω at 5 mA - determines output voltage stability under load transients |
| Reverse Leakage | 0.5 μA at 7.3 V - ensures minimal quiescent current in standby voltage-monitoring circuits |
| Temperature Coefficient | +3.8 mV/°C - quantifies voltage drift per degree Celsius, critical for wide-temperature applications |
| Capacitance | 130 pF at 0 V, 1 MHz - impacts high-frequency noise filtering capability in decoupling roles |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct integration into handheld device front-end protection without external ESD buffers |
Pinout & Package
Package: SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm, Pb-free, RoHS compliant, cathode marked by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node during Zener operation; forward conduction path when biased positively |
| 2 | No Connection | Internally unconnected; must remain floating - not usable as thermal pad or auxiliary terminal |
| 3 | Cathode | Connected to higher-potential node; carries reverse current during voltage regulation or clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including infotainment power rails and sensor interface protection |
| 16 kV HBM ESD Robustness | Eliminates need for discrete ESD diodes in USB, button, or I/O line protection designs |
| 250 mW FR-5 Power Rating | Supports sustained clamping in battery-powered devices with limited PCB area for heat spreading |
| −65°C to +150°C Operating Range | Enables deployment in under-hood automotive modules and industrial edge sensors without derating |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements for consumer, medical, and industrial end equipment |
Applications
| Portable Power Monitoring | Automotive Sensor Reference |
|---|---|
Use Scenario: Monitoring Li-ion battery voltage in Bluetooth earbuds to trigger low-battery shutdown. IC Role / Device Role / Timing Role: Zener reference for ADC input scaling and comparator threshold setting. Use Value: Stable 9.1 V reference enables accurate 3.0–4.2 V battery measurement with <±1% full-scale error over temperature. |
Use Scenario: Providing stable bias voltage to MEMS pressure sensor in engine coolant temperature module. IC Role / Device Role / Timing Role: Precision voltage reference for analog front-end amplifier gain calibration. Use Value: +3.8 mV/°C TC and AEC-Q101 qualification ensure sensor output accuracy remains within ±0.5% over −40°C to +125°C operating range. |
| USB Port Overvoltage Clamp | Industrial PLC Input Protection |
Use Scenario: Protecting microcontroller GPIO pins from transient surges on USB VBUS detection lines. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to 9.6 V peak during ESD events. Use Value: 16 kV HBM rating and 130 pF capacitance prevent false triggering while maintaining signal integrity up to 10 MHz. |
Use Scenario: Safeguarding 24 V digital input channels in factory automation controllers against field-wiring faults. IC Role / Device Role / Timing Role: Primary overvoltage limiter in series with current-limiting resistor on input stage. Use Value: 250 mW power rating sustains 24 V × 10 mA = 240 mW fault energy without degradation, ensuring long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C9V1LT3G | Standard-grade version without automotive qualification; same Zener voltage, impedance, and package | Lacks AEC-Q101 validation and PPAP support; suitable for commercial portable devices only | Select when automotive compliance is unnecessary and cost sensitivity is high |
| SZBZX84B9V1LT3G | Tighter 2% Zener tolerance (8.92–9.28 V), identical thermal coefficient and package | Higher precision enables tighter ADC reference or comparator hysteresis control | Choose when system-level voltage accuracy demands <±2% regulation, not just ±5.5% |
Compared with SZBZX84C9V1LT3G, BZX84C9V1LT3G offers identical electrical performance at lower qualification cost, while SZBZX84B9V1LT3G trades wider voltage tolerance for improved precision-enabling optimized trade-offs between automotive compliance, accuracy, and bill-of-materials cost.
Availability
SZBZX84C9V1LT3G is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor interfaces, and portable medical monitors requiring stable component supply with guaranteed long-term sourcing.
Supply support for SZBZX84C9V1LT3G 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
SZBZX84C9V1LT3G belongs to the SZBZX84CxxxLT3G automotive Zener diode family, engineered for reliable voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the Zener voltage tolerance of SZBZX84C9V1LT3G?
The SZBZX84C9V1LT3G has a nominal Zener voltage of 9.1 V with a tolerance of ±5.5%, meaning the actual breakdown voltage falls between 8.5 V and 9.6 V when tested at 5 mA (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet, under the BZX84CxxxLT1 series section for the SZBZX84C9V1LT1/T3G entry.
Is SZBZX84C9V1LT3G qualified for automotive use?
Yes, SZBZX84C9V1LT3G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the Features section of the onsemi datasheet. The "SZ" prefix denotes automotive and other applications requiring unique site and control change requirements, confirming its suitability for under-hood and cabin electronics where reliability across extended temperature and vibration profiles is mandatory.
What is the pin configuration of SZBZX84C9V1LT3G?
SZBZX84C9V1LT3G uses the SOT-23 package with Pin 1 as Anode, Pin 2 as No Connection (internally unconnected), and Pin 3 as Cathode - per the Marking Diagram and Mechanical Characteristics section (Style 8) in the datasheet. This configuration is consistent across all BZX84Cxxx and SZBZX84Cxxx variants in the series.
What is the maximum power dissipation of SZBZX84C9V1LT3G on FR-5 board?
SZBZX84C9V1LT3G is rated for 250 mW total power dissipation on FR-5 board at 25°C ambient temperature, with a derating factor of 2.0 mW/°C above that temperature. This value is listed in the Maximum Ratings table on page 2 of the official onsemi datasheet and applies directly to the SZBZX84C9V1LT3G variant.
Does SZBZX84C9V1LT3G have ESD protection built-in?
Yes, SZBZX84C9V1LT3G has an ESD rating of Class 3 (>16 kV) per Human Body Model, as documented in the Features section of the onsemi datasheet. This intrinsic robustness eliminates the need for additional external ESD protection components in many I/O line and power rail applications.
SZBZX84C9V1LT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZBZX84CxxxLT1G
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 250 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZBZX84C9V1LT3G FAQ
1.How can I place an order for SZBZX84C9V1LT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C9V1LT3G 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 SZBZX84C9V1LT3G reliable?
The price and inventory of SZBZX84C9V1LT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C9V1LT3G is usually 5 days.
3.What payment methods are accepted for SZBZX84C9V1LT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C9V1LT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C9V1LT3G?
SZBZX84C9V1LT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C9V1LT3G 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 SZBZX84C9V1LT3G?
For technical support, including SZBZX84C9V1LT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C9V1LT3G requirements.
6.How does Aetrix verify that SZBZX84C9V1LT3G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C9V1LT3G 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 SZBZX84C9V1LT3G meets industry standards.
7.What is the process for return or replacement of SZBZX84C9V1LT3G?
All SZBZX84C9V1LT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C9V1LT3G, 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 SZBZX84C9V1LT3G part is unused and in its original packaging.
Return procedure for SZBZX84C9V1LT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C9V1LT3G Tags
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