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onsemi SZBZX84C12ET3G
- Part No.:
- SZBZX84C12ET3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C12ET3G.pdf
- Description:
- DIODE ZENER 12V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,715
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Product details
Overview
SZBZX84C12ET3G from onsemi is a 12 V ±5% Zener diode in SOT-23 package, rated for 250 mW power dissipation at 25°C, with 25 Ω dynamic impedance at 5 mA test current and 0.1 μA reverse leakage at 9.4 V. It provides precision voltage regulation in space-constrained portable electronics and high-density PCBs.
For engineers reviewing the SZBZX84C12ET3G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener tolerance (±5%), thermal coefficient (+6.0 mV/°C), ESD robustness (>16 kV HBM), and automotive-grade AEC-Q101 qualification.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at nominal 12 V. Its SOT-23 package features anode (Pin 1), no connection (Pin 2), and cathode (Pin 3), enabling unidirectional regulation with polarity band identification.
The SZBZX84C12ET3G exhibits a positive temperature coefficient of +6.0 mV/°C at 5 mA, low 130 pF capacitance at 0 V bias and 1 MHz, and maintains stable regulation across −65°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 12 V nominal, 11.4–12.7 V range at 5 mA - defines regulated output voltage under standard test conditions |
| Power Dissipation | 250 mW on FR-5 board at 25°C - sets maximum continuous power handling before thermal derating |
| Zener Impedance | 25 Ω max at 5 mA - determines regulation stiffness and AC ripple rejection capability |
| Reverse Leakage | 0.1 μA max at 9.4 V - ensures minimal standby current in voltage-sense or bias networks |
| Temperature Coefficient | +6.0 mV/°C at 5 mA - quantifies voltage drift over temperature, critical for stable references |
| ESD Rating | Class 3 (>16 kV) per HBM - supports robust handling in automated assembly and end-use environments |
| Capacitance | 130 pF at 0 V, 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish; cathode indicated by polarity band; Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during regulation |
| 2 | No Connection | Internally unconnected; electrically isolated, no PCB routing required |
| 3 | Cathode | Connected to higher-potential node; polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics |
| Tight thermal stability | +6.0 mV/°C TC enables predictable voltage shift over industrial temperature range |
| High ESD immunity | Class 3 HBM (>16 kV) eliminates need for external protection in handheld and portable designs |
| Low-capacitance regulation | 130 pF allows use in timing circuits and RF bias networks without signal distortion |
| Automotive traceability | SZ prefix denotes unique site/control change requirements and PPAP capability |
Applications
| Power Supply Rail Clamp | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping 12 V supply rail against transient overvoltage in automotive infotainment head units. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing surge energy to protect downstream LDOs and PMICs. Use Value: Prevents latch-up or damage to 12 V input stages using only 250 mW dissipation and no active control logic. |
Use Scenario: Generating a precise 12 V threshold for reset assertion in industrial PLC controllers. IC Role / Device Role / Timing Role: Reference element in RC-based reset generator, defining trip point for brown-out detection. Use Value: Enables repeatable reset behavior across −40°C to +125°C with ±5% tolerance and +6.0 mV/°C TC. |
| Portable Device Battery Monitor | High-Density Sensor Node Bias |
Use Scenario: Providing stable 12 V reference for ADC measurement of Li-ion battery pack voltage in medical wearables. IC Role / Device Role / Timing Role: Precision voltage reference for analog front-end scaling, not load regulation. Use Value: Delivers 130 pF low capacitance and 0.1 μA leakage to minimize loading error and preserve battery life. |
Use Scenario: Biasing photodiode amplifiers in compact environmental sensor modules on 4-layer IoT PCBs. IC Role / Device Role / Timing Role: Low-profile shunt reference establishing DC operating point for transimpedance amplifier. Use Value: SOT-23 footprint saves >60% board area versus DO-35, enabling 2× sensor density per square centimeter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C12LT3G | Same electrical specs but lacks SZ prefix and AEC-Q101 qualification; standard commercial grade | Not suitable for automotive or safety-critical systems requiring PPAP documentation | Select when cost sensitivity outweighs automotive compliance requirements |
| SZBZX84C12LT1G | Identical Zener parameters and AEC-Q101 rating, but supplied in 3,000-piece tape-and-reel vs. 10,000-piece for SZBZX84C12ET3G | Preferred for prototyping or low-volume production where smaller reels reduce inventory overhead | Choose for R&D validation or pilot runs where reel size impacts procurement logistics |
Compared with BZX84C12LT3G and SZBZX84C12LT1G, the SZBZX84C12ET3G offers identical regulation performance with full automotive traceability and larger reel packaging-making it optimal for high-volume Tier 1 production where PPAP compliance and supply chain efficiency are mandatory.
Availability
SZBZX84C12ET3G is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, and portable medical devices requiring stable component supply with full AEC-Q101 documentation and long-term lifecycle support.
Supply support for SZBZX84C12ET3G 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.
The SZBZX84C12ET3G belongs to the SZBZX84Cxxx series of AEC-Q101-qualified Zener diodes designed specifically for automotive subsystems requiring high reliability, tight process control, and PPAP-ready manufacturing.
FAQ
What is the Zener voltage tolerance of SZBZX84C12ET3G?
The SZBZX84C12ET3G has a nominal Zener voltage of 12 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 11.4 V and 12.7 V when tested at 5 mA. This tolerance is specified per the BZX84Cxxx standard series and confirmed in the onsemi datasheet Table 3 for the SZBZX84C12LT1G/SZBZX84C12ET3G variant group.
Is SZBZX84C12ET3G suitable for automotive applications?
Yes, SZBZX84C12ET3G is AEC-Q101 qualified and PPAP capable, with the "SZ" prefix indicating automotive-specific site and control change requirements. It meets stringent reliability, traceability, and process validation standards required for engine control, body electronics, and ADAS subsystems.
What is the pin configuration of SZBZX84C12ET3G?
SZBZX84C12ET3G uses the SOT-23 package with Pin 1 = Anode, Pin 2 = No Connection (internally unconnected), and Pin 3 = Cathode. The cathode is marked by a polarity band on the package body, consistent with Style 8 mechanical outline in the onsemi package drawing.
How does the temperature coefficient affect SZBZX84C12ET3G performance?
The SZBZX84C12ET3G has a temperature coefficient of +6.0 mV/°C at 5 mA, meaning its Zener voltage increases by approximately 6 mV per degree Celsius rise in junction temperature. This positive drift must be accounted for in precision reference designs operating across wide ambient ranges.
What packaging option is used for SZBZX84C12ET3G?
SZBZX84C12ET3G is supplied in 10,000-piece tape-and-reel packaging (T3G suffix), optimized for high-volume automated SMT placement. This differs from the LT1G variant (3,000-piece reel) and reflects onsemi's standard shipping configuration for automotive-grade Zener diodes in volume production.
SZBZX84C12ET3G 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):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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)
SZBZX84C12ET3G FAQ
1.How can I place an order for SZBZX84C12ET3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C12ET3G 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 SZBZX84C12ET3G reliable?
The price and inventory of SZBZX84C12ET3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C12ET3G is usually 5 days.
3.What payment methods are accepted for SZBZX84C12ET3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C12ET3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C12ET3G?
SZBZX84C12ET3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C12ET3G 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 SZBZX84C12ET3G?
For technical support, including SZBZX84C12ET3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C12ET3G requirements.
6.How does Aetrix verify that SZBZX84C12ET3G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C12ET3G 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 SZBZX84C12ET3G meets industry standards.
7.What is the process for return or replacement of SZBZX84C12ET3G?
All SZBZX84C12ET3G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C12ET3G, 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 SZBZX84C12ET3G part is unused and in its original packaging.
Return procedure for SZBZX84C12ET3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C12ET3G Tags
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