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onsemi SZBZX84C15ET3G
- Part No.:
- SZBZX84C15ET3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C15ET3G.pdf
- Description:
- DIODE ZENER 15V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:18,534
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Product details
Overview
SZBZX84C15ET3G from onsemi is a 15 V, 250 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and reference applications with ±0.6 V tolerance at 5 mA test current, 30 Ω dynamic impedance, and 0.05 µA reverse leakage at 12 V. It serves as a stable shunt regulator in power supply feedback loops, overvoltage protection circuits, and voltage reference stages in portable electronics.
For engineers reviewing the SZBZX84C15ET3G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (15 V), power rating (250 mW on FR-5), temperature coefficient (+10.5 mV/°C), ESD robustness (>16 kV HBM), and automotive-grade qualification (AEC-Q101).
Technical Context
This device operates as a silicon planar Zener diode with sharp reverse breakdown at 15 V, optimized for low-current regulation (IZT = 5 mA) and stable performance across −65 °C to +150 °C junction temperature range. Its thermal resistance is 500 °C/W on FR-5 board, enabling reliable operation under transient load conditions.
The SOT-23 package features a cathode-indicated polarity band, void-free thermosetting plastic case rated UL 94 V-0, and Pb-free RoHS-compliant construction. Pin 2 is internally unconnected - only pins 1 (anode) and 3 (cathode) are electrically active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.8 V to 15.6 V @ IZT = 5 mA - ensures tight regulation window for 15 V reference designs |
| Power Dissipation | 250 mW on FR-5 board - supports compact PCB layouts without forced cooling |
| Zener Impedance (ZZT) | 30 Ω @ 5 mA - maintains low output impedance for stable voltage under varying load |
| Reverse Leakage Current | 0.05 µA @ VR = 12 V - minimizes quiescent current in battery-powered systems |
| Temperature Coefficient | +10.5 mV/°C @ 5 mA - enables predictable drift compensation in temperature-sensitive references |
| ESD Rating | Class 3 (>16 kV HBM) - withstands handling and assembly electrostatic discharge without degradation |
| Peak Pulse Power | 225 W @ 8 × 20 µs - provides transient surge immunity in input protection circuits |
Pinout & Package
SOT-23 (TO-236) package: 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm pitch, void-free thermosetting plastic case with corrosion-resistant solderable finish and UL 94 V-0 flammability rating. Cathode identified by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential side of regulated node; reverse-biased during Zener operation |
| 2 | No Connection | Internally unconnected - no electrical function; must remain floating in layout |
| 3 | Cathode | Connected to higher-potential side; carries full Zener current and defines regulated voltage node |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control modules and ADAS power rails |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements for industrial and consumer production |
| Optimized for Automated Assembly | Package geometry and marking support high-yield pick-and-place and reflow processes |
| High-Density Footprint | SOT-23 size enables placement in space-constrained areas such as smartphone PMIC sections |
| Stable Low-Current Regulation | Specified performance at 1 mA, 5 mA, and 20 mA enables consistent behavior across operating modes |
Applications
| Portable Power Management | Automotive Sensor Reference |
|---|---|
Use Scenario: Voltage reference in Li-ion battery charger IC feedback loop for ±1% output accuracy. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 15 V bias to error amplifier input. Use Value: Tight 13.8–15.6 V tolerance and +10.5 mV/°C TC allow direct use without external trimming in handheld devices. |
Use Scenario: Precision reference for analog front-end of tire pressure monitoring system (TPMS) sensor. IC Role / Device Role / Timing Role: Regulated bias source for op-amp and ADC reference rail in harsh-temperature environments. Use Value: AEC-Q101 qualification and −65 °C to +150 °C operation ensure reliability across vehicle lifecycle. |
| Industrial PLC Input Protection | Consumer Audio DC-DC Feedback |
Use Scenario: Overvoltage clamp on 24 V digital input channel of programmable logic controller. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting input to safe levels during surge events. Use Value: 225 W peak pulse rating and 0.05 µA leakage preserve signal integrity while absorbing 8 × 20 µs transients. |
Use Scenario: Output voltage setting element in buck converter for Bluetooth speaker power stage. IC Role / Device Role / Timing Role: Feedback node reference defining regulated 5 V output via resistor divider. Use Value: Low 30 Ω Zener impedance minimizes output voltage deviation under dynamic load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C15ET3G | Non-automotive grade; same electrical specs but lacks AEC-Q101 validation and SZ prefix traceability | Approved for commercial/industrial use only; not qualified for automotive production | Select when cost sensitivity outweighs automotive compliance requirements |
| MMSZ4687T1G | Same 15 V nominal Zener, but 500 mW rating on FR-4 and higher 50 Ω ZZT; different SOD-123 package | Requires PCB footprint change; better suited for higher-power dissipation needs | Choose when thermal margin >250 mW is required and SOT-23 footprint is not mandatory |
Compared with BZX84C15ET3G and MMSZ4687T1G, SZBZX84C15ET3G uniquely combines automotive qualification, SOT-23 miniaturization, and verified 250 mW derating - making it the only option for space-constrained AEC-Q101-compliant designs requiring exact pin-compatible replacement.
Availability
SZBZX84C15ET3G is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor nodes, and portable medical devices requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZBZX84C15ET3G 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 silicon solutions for automotive, industrial, cloud, and IoT applications, with leadership in power management, analog, sensors, and connectivity.
SZBZX84C15ET3G belongs to the BZX84CxxxETxG Zener regulator family, engineered specifically for high-reliability voltage reference and clamping in space-constrained, thermally demanding environments.
FAQ
What is the Zener voltage tolerance of SZBZX84C15ET3G at 5 mA test current?
The SZBZX84C15ET3G has a Zener voltage range of 13.8 V to 15.6 V at IZT = 5 mA, corresponding to a ±0.6 V absolute tolerance around the nominal 15 V rating. This specification is measured per the onsemi datasheet under TA = 25 °C and is guaranteed across the full operating temperature range.
Is SZBZX84C15ET3G suitable for automotive applications?
Yes, SZBZX84C15ET3G is AEC-Q101 qualified and PPAP capable, with manufacturing site and process controls meeting automotive requirements. The "SZ" prefix explicitly denotes this automotive-grade variant, distinguishing it from commercial-grade BZX84C15ET3G parts.
What is the maximum reverse leakage current for SZBZX84C15ET3G?
The maximum reverse leakage current for SZBZX84C15ET3G is 0.05 µA at VR = 12 V and TA = 25 °C. This ultra-low leakage supports extended battery life in always-on portable electronics where standby current must be minimized.
Does SZBZX84C15ET3G have a functional pin 2?
No, pin 2 of SZBZX84C15ET3G is internally unconnected (NC). The device uses only pins 1 (anode) and 3 (cathode) for electrical operation. Layouts must leave pin 2 floating - no solder mask or copper connection is required or recommended.
What packaging options are available for SZBZX84C15ET3G?
SZBZX84C15ET3G is supplied in 10,000-piece tape-and-reel format (SOT-23, Pb-free), per the onsemi ordering information. Reel orientation, carrier tape dimensions, and part marking follow BRD8011/D specifications, with device code "BC3" and date code marked on the package.
SZBZX84C15ET3G 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):
- 15 V
- Tolerance:
- ±6%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.5 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)
SZBZX84C15ET3G FAQ
1.How can I place an order for SZBZX84C15ET3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C15ET3G 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 SZBZX84C15ET3G reliable?
The price and inventory of SZBZX84C15ET3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C15ET3G is usually 5 days.
3.What payment methods are accepted for SZBZX84C15ET3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C15ET3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C15ET3G?
SZBZX84C15ET3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C15ET3G 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 SZBZX84C15ET3G?
For technical support, including SZBZX84C15ET3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C15ET3G requirements.
6.How does Aetrix verify that SZBZX84C15ET3G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C15ET3G 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 SZBZX84C15ET3G meets industry standards.
7.What is the process for return or replacement of SZBZX84C15ET3G?
All SZBZX84C15ET3G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C15ET3G, 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 SZBZX84C15ET3G part is unused and in its original packaging.
Return procedure for SZBZX84C15ET3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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