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onsemi SZBZX84C3V0ET1G
- Part No.:
- SZBZX84C3V0ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C3V0ET1G.pdf
- Description:
- DIODE ZENER 3V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,445
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Product details
Overview
SZBZX84C3V0ET1G from onsemi is a 3.0 V ±0.2 V Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board at 25 °C, with 95 Ω dynamic impedance at 5 mA test current and 10 µA reverse leakage at 1.0 V. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the SZBZX84C3V0ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±0.2 V), thermal coefficient (−3.5 mV/°C), ESD rating (>16 kV HBM), peak pulse power (225 W), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage-regulating diode with cathode-anode polarity, requiring reverse-biased connection to maintain stable 3.0 V output across load variations. Its Zener breakdown is characterized at IZT = 5 mA, with guaranteed VZ between 2.8 V and 3.2 V and dynamic impedance ≤95 Ω under that condition.
Designed for surface-mount assembly, it features Class 3 ESD robustness (>16 kV HBM), UL 94 V-0 flammability rating, and Pb-free RoHS-compliant construction. Junction temperature range spans −65 °C to +150 °C, supporting operation in automotive and industrial environments where thermal stability is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.8 V to 3.2 V @ 5 mA - ensures tight regulation window for 3.0 V reference applications |
| Power Dissipation | 250 mW on FR-5 board @ 25 °C - defines maximum continuous DC power handling in standard PCB layout |
| Dynamic Impedance (ZZT) | ≤95 Ω @ 5 mA - determines output voltage variation under changing load current |
| Reverse Leakage Current | ≤10 µA @ 1.0 V - limits standby power loss in battery-powered circuits |
| ESD Rating | Class 3 (>16 kV) per HBM - provides robustness against electrostatic discharge during handling and assembly |
| Temperature Coefficient | −3.5 mV/°C @ 5 mA - quantifies voltage drift with ambient temperature change |
| Capacitance | 450 pF @ 0 V, 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent designs |
Pinout & Package
SOT-23 (TO-236) plastic surface-mount package, 2.90 mm × 1.30 mm × 1.00 mm, void-free thermosetting case with corrosion-resistant 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 node; reverse bias applied between Anode (pin 1) and Cathode (pin 3) |
| 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| 3 | Cathode | Connected to higher-potential node; polarity band marks this terminal for correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock testing |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements without lead-based solder compatibility compromises |
| Peak Pulse Power | 225 W for 8 × 20 µs waveform - enables transient overvoltage suppression in surge-prone interfaces |
| Small Outline Footprint | SOT-23 package allows placement in space-constrained areas such as smartphone camera modules or wearables |
| High-Density Board Compatibility | Optimized land pattern and solderability support automated reflow assembly on fine-pitch PCBs |
Applications
| Portable Power Management | Automotive Sensor Biasing |
|---|---|
Use Scenario: Voltage reference for ADC input scaling in Bluetooth earbuds with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Zener diode providing stable 3.0 V reference to analog front-end circuitry. Use Value: Maintains measurement accuracy despite battery voltage sag from 4.2 V to 3.0 V during discharge cycle. |
Use Scenario: Bias voltage source for MEMS pressure sensor in engine control unit (ECU) cold-start conditions. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed bias point for sensor excitation. Use Value: Ensures consistent sensor output across −40 °C to +125 °C ambient range due to known TC of −3.5 mV/°C. |
| USB-C Port Protection | Industrial IoT Node Regulation |
Use Scenario: Overvoltage clamp on VBUS line of USB-C receptacle to prevent damage from hot-plug transients. IC Role / Device Role / Timing Role: Fast-response shunt element absorbing 8 × 20 µs surges up to 225 W peak power. Use Value: Limits VBUS excursion to ≤3.2 V during ESD events, protecting downstream USB PD controller ICs. |
Use Scenario: Local 3.0 V rail stabilization for LoRaWAN transceiver in battery-powered smart meter. IC Role / Device Role / Timing Role: Low-quiescent shunt regulator maintaining clean supply for RF section during transmit bursts. Use Value: Delivers <10 µA leakage at 1.0 V reverse bias, extending 10-year battery life while rejecting ripple from switching regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C3V0ET1G | Non-automotive grade; lacks AEC-Q101 qualification and SZ-prefix process controls | Approved for consumer electronics only; not validated for automotive temperature cycling or PPAP documentation | Select when cost sensitivity outweighs automotive qualification requirements |
| MMSZ4675T1G | Same 3.0 V nominal Zener voltage but higher dynamic impedance (150 Ω vs. 95 Ω) and lower ESD rating (Class 2, >8 kV) | Less suitable for precision reference use in noisy environments or high-ESD-risk assembly lines | Choose only if legacy design reuse mandates MMSZ footprint and tolerance bands allow ±0.3 V variation |
Compared with SZBZX84C3V0ET1G, BZX84C3V0ET1G omits automotive qualification and tighter process controls, while MMSZ4675T1G trades off regulation precision and ESD robustness for broader distributor availability - making SZBZX84C3V0ET1G optimal for new automotive or industrial designs demanding verified reliability and stable 3.0 V reference performance.
Availability
SZBZX84C3V0ET1G is available at Aetrix Electronics and suitable for portable power management, automotive sensor biasing, USB-C port protection, and industrial IoT node regulation requiring stable component supply and long-term lifecycle support.
Supply support for SZBZX84C3V0ET1G 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 manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
SZBZX84C3V0ET1G belongs to the BZX84CxxxET1G/SZBZX84CxxxET1G Zener diode family, engineered for compact, high-reliability voltage regulation in space-constrained and thermally demanding applications.
FAQ
What is the Zener voltage tolerance of SZBZX84C3V0ET1G at 5 mA test current?
The SZBZX84C3V0ET1G has a specified Zener voltage range of 2.8 V to 3.2 V at IZT = 5 mA, corresponding to a ±0.2 V absolute tolerance around the nominal 3.0 V value. This tolerance is guaranteed across manufacturing lots and supports precision reference designs where tight voltage windows are required.
Does SZBZX84C3V0ET1G support automotive applications?
Yes, SZBZX84C3V0ET1G is AEC-Q101 qualified and PPAP capable, with process controls and traceability meeting automotive supply chain requirements. Its extended junction temperature range (−65 °C to +150 °C) and robust ESD rating (>16 kV HBM) validate its use in engine bay sensors, body control modules, and infotainment power rails.
What is the thermal resistance junction-to-ambient for SZBZX84C3V0ET1G on FR-5 board?
The thermal resistance junction-to-ambient (RJA) for SZBZX84C3V0ET1G is 500 °C/W when mounted on an FR-5 board. This value reflects the thermal path from die to ambient air under standard JEDEC test conditions and informs derating calculations - for example, power must be reduced by 2.0 mW per °C above 25 °C ambient.
How is pin 2 used in the SZBZX84C3V0ET1G SOT-23 package?
Pin 2 of SZBZX84C3V0ET1G is internally unconnected (NC) and must remain electrically floating on the PCB. It is not tied to any internal semiconductor structure and serves only as a mechanical support feature in the SOT-23 mold compound. No trace, pad, or solder connection should be made to pin 2.
What is the maximum reverse leakage current for SZBZX84C3V0ET1G at 1.0 V?
The maximum reverse leakage current for SZBZX84C3V0ET1G is 10 µA at VR = 1.0 V and TA = 25 °C. This parameter directly affects quiescent power consumption in always-on circuits and is critical for battery-operated devices where microamp-level leakage determines operational lifetime.
SZBZX84C3V0ET1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3 V
- Tolerance:
- ±7%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 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)
SZBZX84C3V0ET1G FAQ
1.How can I place an order for SZBZX84C3V0ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C3V0ET1G 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 SZBZX84C3V0ET1G reliable?
The price and inventory of SZBZX84C3V0ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C3V0ET1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C3V0ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C3V0ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C3V0ET1G?
SZBZX84C3V0ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C3V0ET1G 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 SZBZX84C3V0ET1G?
For technical support, including SZBZX84C3V0ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C3V0ET1G requirements.
6.How does Aetrix verify that SZBZX84C3V0ET1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C3V0ET1G 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 SZBZX84C3V0ET1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C3V0ET1G?
All SZBZX84C3V0ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C3V0ET1G, 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 SZBZX84C3V0ET1G part is unused and in its original packaging.
Return procedure for SZBZX84C3V0ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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