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onsemi SZBZX84C6V8ET1G
- Part No.:
- SZBZX84C6V8ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C6V8ET1G.pdf
- Description:
- DIODE ZENER 6.8V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,753
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Product details
Overview
SZBZX84C6V8ET1G from onsemi is a 6.8 V, 250 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and reference applications with ±0.4 V tolerance at 5 mA test current, 15 Ω dynamic impedance, and 2.0 µA reverse leakage at 5.0 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 SZBZX84C6V8ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (6.8 V), power rating (250 mW on FR-5 board), temperature coefficient (+1.2 mV/°C), ESD robustness (>16 kV HBM), and SOT-23 footprint compatibility with automated assembly.
Technical Context
This device operates as a silicon planar Zener diode with controlled avalanche breakdown at 6.8 V, optimized for low-noise voltage reference and clamping functions. Its thermal resistance of 500 °C/W (FR-5 board) and junction temperature range of −65 °C to +150 °C support reliable operation in compact, thermally constrained designs.
The SOT-23 package features a cathode-indicated polarity band, Pb-free construction, UL 94 V-0 flammability rating, and 260 °C soldering tolerance for 10 seconds. Pin 2 is internally unconnected - a critical layout constraint distinguishing it from dual-anode or dual-cathode variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 6.4–7.2 V @ IZT = 5 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation | 250 mW on FR-5 board - maximum continuous DC power before thermal derating begins |
| Zener Impedance ZZT | 15 Ω @ 5 mA - indicates voltage stability under small-signal AC load variations |
| Reverse Leakage IR | 2.0 µA @ VR = 5.0 V - determines quiescent current draw in high-impedance bias networks |
| Temperature Coefficient | +1.2 mV/°C @ 5 mA - quantifies voltage drift per degree Celsius near room temperature |
| Capacitance C | 155 pF @ VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and transient response |
| ESD Rating | Class 3 (>16 kV) HBM - ensures robustness against handling-induced electrostatic discharge |
Pinout & Package
SOT-23 (TO-236) plastic surface-mount package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish and UL 94 V-0 rating. Cathode identified by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | DC current entry point during forward conduction; connected to lower-potential node in shunt regulation |
| 2 | No Connection | Internally unconnected - must remain floating; no PCB trace or pad should tie this pin |
| 3 | Cathode | DC current exit point during Zener breakdown; tied to regulated voltage node or feedback point |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and lifetime stability |
| Pb-Free & RoHS Compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-020 reflow profile requirements |
| Optimized for Automated Assembly | Standardized SOT-23 footprint and marking enable high-yield pick-and-place and AOI inspection |
| High ESD Robustness | Withstands >16 kV human-body-model discharge without parameter shift or failure |
| Low Capacitance | 155 pF enables use in moderate-speed signal conditioning without excessive phase lag |
Applications
| Portable Power Management | Industrial Sensor Reference |
|---|---|
Use Scenario: Voltage reference for ADC biasing and LDO feedback in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 6.8 V reference point independent of supply variation. Use Value: Enables <±0.5% measurement accuracy over −40 °C to +85 °C due to low TC and tight VZ tolerance. |
Use Scenario: Precision voltage clamp in 4–20 mA transmitter front-end circuitry. IC Role / Device Role / Timing Role: Overvoltage protector limiting input to analog front-end op-amps during surge events. Use Value: Limits transient excursions to ≤7.2 V while drawing <2 µA at normal operating voltage, minimizing loading error. |
| Automotive Body Control Module | Consumer Audio Bias Network |
Use Scenario: Regulated bias source for CAN transceiver VIO supply in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Low-power Zener shunt regulator stabilizing logic-level interface voltage. Use Value: Maintains stable 6.8 V despite battery fluctuations (9–16 V), meeting AEC-Q101 vibration and thermal shock requirements. |
Use Scenario: DC offset nulling and level-shifting in headphone amplifier bias chains. IC Role / Device Role / Timing Role: Low-noise voltage reference establishing quiescent operating point for Class AB output stage. Use Value: Delivers <15 Ω dynamic impedance and <155 pF capacitance to minimize audible hum and crosstalk in audio path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C6V8ET1G | Non-automotive grade; lacks AEC-Q101 qualification and PPAP capability; identical electrical specs and SOT-23 pinout | Approved for commercial/industrial use only; not suitable for automotive production programs | Select when cost sensitivity outweighs automotive compliance requirements and lifecycle assurance |
| MMSZ4687T1G | Same 6.8 V nominal Zener voltage but higher ZZT (40 Ω vs. 15 Ω); 500 mW power rating on FR-4; different marking and date code format | Better suited for higher-power clamping where tighter impedance is noncritical; larger thermal margin | Choose when board-level power dissipation exceeds 250 mW or when legacy MMSZ footprint compatibility is required |
Compared with SZBZX84C6V8ET1G, BZX84C6V8ET1G offers identical regulation performance but no automotive qualification, while MMSZ4687T1G trades lower impedance for higher power handling and relaxed Zener tolerance - making each optimal for distinct reliability or thermal design constraints.
Availability
SZBZX84C6V8ET1G is available at Aetrix Electronics and suitable for portable power management, industrial sensor reference, and automotive body control module applications requiring stable component supply, long-term lifecycle visibility, and AEC-Q101-compliant sourcing.
Supply support for SZBZX84C6V8ET1G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The SZBZX84C6V8ET1G belongs to the BZX84CxxxET1G/SZBZX84CxxxET1G Zener regulator family, engineered for space-constrained voltage reference and protection in high-density PCBs where reliability, ESD immunity, and automotive qualification are mandatory.
FAQ
What is the Zener voltage tolerance of SZBZX84C6V8ET1G at 5 mA test current?
The SZBZX84C6V8ET1G has a Zener voltage range of 6.4 V to 7.2 V at IZT = 5 mA, corresponding to a ±0.4 V absolute tolerance around the nominal 6.8 V rating. This tolerance is verified per onsemi's Electrical Characteristics table and reflects manufacturing process variation under standardized test conditions.
Is SZBZX84C6V8ET1G pin-compatible with standard SOT-23 Zener diodes?
Yes, SZBZX84C6V8ET1G uses the standard SOT-23 (TO-236) package with pin 1 = anode, pin 2 = no connection, and pin 3 = cathode - matching the mechanical footprint and terminal assignment of all BZX84CxxxET1G-series devices. Pin 2 must remain unconnected in layout.
Does SZBZX84C6V8ET1G meet automotive qualification standards?
Yes, SZBZX84C6V8ET1G is AEC-Q101 qualified and PPAP capable, with full documentation supporting its use in automotive body electronics, infotainment systems, and ADAS subsystems. The "SZ" prefix explicitly denotes automotive-grade process control and site-specific change management.
What is the maximum reverse leakage current for SZBZX84C6V8ET1G at 5.0 V?
The maximum reverse leakage current for SZBZX84C6V8ET1G is 2.0 µA at VR = 5.0 V and TA = 25 °C, as specified in the Electrical Characteristics table. This value ensures minimal parasitic loading in high-impedance reference networks and bias circuits.
How does the temperature coefficient of SZBZX84C6V8ET1G affect voltage stability?
The SZBZX84C6V8ET1G exhibits a temperature coefficient of +1.2 mV/°C at IZT = 5 mA, meaning its Zener voltage increases by approximately 1.2 mV per degree Celsius rise in junction temperature. This positive TC supports stable regulation across −40 °C to +125 °C ambient ranges when used within derated power limits.
SZBZX84C6V8ET1G 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):
- 6.8 V
- Tolerance:
- ±6%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 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)
SZBZX84C6V8ET1G FAQ
1.How can I place an order for SZBZX84C6V8ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C6V8ET1G 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 SZBZX84C6V8ET1G reliable?
The price and inventory of SZBZX84C6V8ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C6V8ET1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C6V8ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C6V8ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C6V8ET1G?
SZBZX84C6V8ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C6V8ET1G 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 SZBZX84C6V8ET1G?
For technical support, including SZBZX84C6V8ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C6V8ET1G requirements.
6.How does Aetrix verify that SZBZX84C6V8ET1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C6V8ET1G 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 SZBZX84C6V8ET1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C6V8ET1G?
All SZBZX84C6V8ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C6V8ET1G, 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 SZBZX84C6V8ET1G part is unused and in its original packaging.
Return procedure for SZBZX84C6V8ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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