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onsemi SZBZX84C30LT1G
- Part No.:
- SZBZX84C30LT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C30LT1G.pdf
- Description:
- DIODE ZENER 30V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:70,330
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Product details
Overview
SZBZX84C30LT1G from onsemi is a 30 V ±5% Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board at 25°C, with 80 Ω dynamic impedance at 5 mA test current and 50 nA reverse leakage at 23.8 V. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the SZBZX84C30LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal coefficient (+21 mV/°C), ESD rating (>16 kV HBM), and automotive-grade AEC-Q101 qualification.
Technical Context
This device operates in reverse-biased breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its 30 V nominal Zener voltage is specified at 5 mA test current (IZT), with tight regulation maintained via low dynamic impedance (80 Ω) and minimal temperature drift (+21 mV/°C).
The SOT-23 package supports automated surface-mount assembly and delivers high-density board integration. With no internal connection on pin 2, the device implements a two-terminal topology where pin 1 is anode and pin 3 is cathode - enabling straightforward placement in shunt-regulation circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28 V to 32 V at 5 mA - ensures stable 30 V reference within ±5% tolerance for precision biasing |
| Power Dissipation | 250 mW on FR-5 board - defines maximum continuous power handling without derating below 25°C |
| Zener Impedance (ZZT) | 80 Ω at 5 mA - determines output voltage variation under changing load current |
| Reverse Leakage Current | 50 nA at 23.8 V - limits standby power loss in battery-powered systems |
| Temperature Coefficient | +21 mV/°C - quantifies voltage drift per degree Celsius rise, critical for wide-temperature operation |
| Capacitance | 70 pF at 0 V, 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling during PCB assembly and end-use in handheld devices |
Pinout & Package
Package: SOT-23 (TO-236), 2.90 mm × 1.30 mm × 1.00 mm, Pb-free, RoHS compliant, cathode marked by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in shunt regulation; reverse-biased relative to cathode during Zener operation |
| 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| 3 | Cathode | Connected to higher-potential node; voltage referenced to this terminal during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including infotainment power rails and sensor biasing |
| 250 mW FR-5 rating | Enables compact voltage clamping without heatsinking in space-constrained layouts |
| ESD >16 kV HBM | Eliminates need for external ESD protection in consumer handheld designs |
| Pb-free & RoHS compliant | Meets global environmental compliance requirements for industrial and medical products |
| Standard tolerance (±5%) | Balances cost and accuracy for non-critical reference applications like LED current setting |
Applications
| Portable Power Management | Automotive Sensor Biasing |
|---|---|
Use Scenario: Regulating bias voltage for analog front-end ICs in Bluetooth headsets and smartwatches. IC Role / Device Role / Timing Role: Shunt Zener regulator providing stable 30 V reference for op-amp supply rails. Use Value: Maintains ADC linearity and sensor signal fidelity despite Li-ion battery voltage sag from 4.2 V to 3.0 V. |
Use Scenario: Clamping transient overvoltage on 12 V CAN bus nodes during load-dump events. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing surge energy before it reaches transceiver ICs. Use Value: Limits peak voltage to ≤32 V, preventing latch-up or damage to AEC-Q100-compliant CAN PHYs. |
| Industrial I/O Module Protection | Medical Wearable Reference |
Use Scenario: Protecting 24 V DC input stage of PLC digital input modules against field-wiring surges. IC Role / Device Role / Timing Role: Primary shunt clamp in multi-stage TVS + Zener protection network. Use Value: Provides precise 30 V clamping threshold with predictable leakage (<50 nA), minimizing false triggering. |
Use Scenario: Generating stable reference for ultra-low-power ECG amplifier biasing in patch-style monitors. IC Role / Device Role / Timing Role: Precision voltage source for op-amp offset trimming and gain-setting resistors. Use Value: Delivers <±0.5% long-term stability over 10-year shelf life due to AEC-Q101 process controls and low IR drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C30LT1G | Same electrical specs but lacks AEC-Q101 qualification and SZ-prefix automotive traceability | Approved for commercial-grade portable electronics only; not suitable for automotive Tier-1 BOMs | Select when cost sensitivity outweighs automotive compliance requirements |
| SZBZX84C33LT1G | 33 V nominal Zener voltage, +23.1 mV/°C tempco, 55 nA leakage at 26.4 V | Used where higher clamping threshold prevents premature conduction in 3.3 V logic rail protection | Choose for 3.3 V system interfaces requiring tighter margin above VDD while retaining same footprint |
Compared with SZBZX84C30LT1G, BZX84C30LT1G offers identical performance at lower cost but no automotive qualification, while SZBZX84C33LT1G shifts clamping voltage upward for compatibility with higher-voltage logic domains - both require no PCB layout change due to shared SOT-23 package and pinout.
Availability
SZBZX84C30LT1G is available at Aetrix Electronics and suitable for portable power management, automotive sensor biasing, industrial I/O module protection, and medical wearable reference applications requiring stable component supply across extended production lifecycles.
Supply support for SZBZX84C30LT1G 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 specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
SZBZX84C30LT1G belongs to the SZBZX84CxxxLT1G series - engineered for automotive and high-reliability applications demanding AEC-Q101 qualification, tight process control, and full PPAP documentation support.
FAQ
What is the Zener voltage tolerance of SZBZX84C30LT1G?
The SZBZX84C30LT1G has a nominal Zener voltage of 30 V with a tolerance of ±5%, meaning the actual breakdown voltage falls between 28 V and 32 V when tested at 5 mA (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet, and applies across the full operating temperature range of −65°C to +150°C.
Is SZBZX84C30LT1G suitable for automotive applications?
Yes, SZBZX84C30LT1G is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications such as sensor biasing, infotainment power rails, and CAN bus protection. The "SZ" prefix explicitly denotes automotive-grade manufacturing controls, lot traceability, and reliability testing beyond standard commercial parts like BZX84C30LT1G.
What is the pin configuration of SZBZX84C30LT1G?
SZBZX84C30LT1G uses the SOT-23 package with pin 1 as anode, pin 2 as no connection (NC), and pin 3 as cathode - per the marking diagram and mechanical outline on page 2 of the datasheet. Pin 2 must remain unconnected on the PCB; incorrect routing to this terminal will cause functional failure.
How does the temperature coefficient affect SZBZX84C30LT1G performance?
The SZBZX84C30LT1G has a positive temperature coefficient of +21 mV/°C at 5 mA, meaning its Zener voltage increases linearly with junction temperature. This behavior is documented in the Electrical Characteristics table and Figure 1 of the datasheet, and must be accounted for in designs operating across −40°C to +125°C ambient ranges.
What is the maximum power dissipation for SZBZX84C30LT1G on FR-5 board?
SZBZX84C30LT1G is rated for 250 mW total power dissipation on FR-5 board at 25°C ambient, with derating of 2.0 mW/°C above that temperature. This value is specified in the Maximum Ratings table (page 2) and defines the upper limit for continuous DC power handling without thermal runaway in standard PCB materials.
SZBZX84C30LT1G 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):
- 30 V
- Tolerance:
- ±7%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 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)
SZBZX84C30LT1G FAQ
1.How can I place an order for SZBZX84C30LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C30LT1G 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 SZBZX84C30LT1G reliable?
The price and inventory of SZBZX84C30LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C30LT1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C30LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C30LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C30LT1G?
SZBZX84C30LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C30LT1G 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 SZBZX84C30LT1G?
For technical support, including SZBZX84C30LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C30LT1G requirements.
6.How does Aetrix verify that SZBZX84C30LT1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C30LT1G 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 SZBZX84C30LT1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C30LT1G?
All SZBZX84C30LT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C30LT1G, 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 SZBZX84C30LT1G part is unused and in its original packaging.
Return procedure for SZBZX84C30LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C30LT1G Tags
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