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onsemi SZBZX84C27ET1G
- Part No.:
- SZBZX84C27ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C27ET1G.pdf
- Description:
- DIODE ZENER 27V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,455
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Product details
Overview
SZBZX84C27ET1G from onsemi is a 27 V, 250 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and reference applications with ±1.9 V tolerance at 5 mA test current, 80 Ω dynamic impedance, and −0.05 μA leakage at 21.2 V reverse bias. It serves as a stable shunt regulator in power supply feedback loops, overvoltage protection circuits, and voltage clamp stages in portable electronics.
For engineers reviewing the SZBZX84C27ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (27 V), power rating (250 mW on FR-5), temperature coefficient (+18.9 mV/°C), ESD robustness (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining a stable reverse-biased breakdown voltage across its cathode-anode terminals under controlled current conditions. Its Zener voltage is specified at three test currents (1 mA, 5 mA, and 20 mA), with corresponding dynamic impedances of 300 Ω, 80 Ω, and 45 Ω - confirming low-impedance regulation performance near nominal operating point.
The SZBZX84C27ET1G features AEC-Q101 qualification, Pb-free RoHS compliance, and UL 94 V-0 flammability rating. Its thermal resistance is 500 °C/W on FR-5 board and 417 °C/W on alumina substrate, supporting reliable operation within −65 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.1–28.9 V @ IZT = 5 mA - defines regulated output voltage window for feedback or clamping use |
| Power Dissipation | 250 mW on FR-5 board - sets maximum continuous power handling without derating at 25 °C ambient |
| Zener Impedance (ZZT) | 80 Ω @ 5 mA - indicates low AC impedance for stable regulation under varying load conditions |
| Reverse Leakage Current | ≤0.05 μA @ VR = 21.2 V - ensures minimal quiescent current draw in standby or high-impedance sensing nodes |
| Temperature Coefficient | +18.9 mV/°C @ 5 mA - quantifies voltage drift per degree Celsius, critical for temperature-stable references |
| Capacitance | 70 pF @ VR = 0 V, f = 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 automated assembly and end-use in handheld devices |
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 cathode polarity band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Current entry terminal in forward bias; reference node in reverse-bias regulation | Connected to lower-potential side of regulated circuit; must be routed with low-inductance trace for stability |
| 2 (No Connection) | Internally unconnected lead | Must remain floating - no PCB trace or pad connection permitted to avoid parasitic coupling or mechanical stress |
| 3 (Cathode) | Current exit terminal in forward bias; regulated voltage node in reverse bias | Connected to voltage source or feedback node; polarity band on package identifies this terminal visually |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock |
| Pb-free and RoHS compliant | Meets global environmental regulations; compatible with lead-free reflow profiles up to 260 °C for 10 seconds |
| High ESD immunity | Withstands >16 kV human-body-model discharge without parameter shift or failure - reduces field return risk |
| Low-profile SOT-23 footprint | Enables placement in space-constrained designs such as smartphone power rails and wearable sensor modules |
| Stable temperature coefficient | +18.9 mV/°C allows predictable voltage drift compensation in industrial temperature ranges (−40 °C to +85 °C) |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulating output voltage of a DC-DC buck converter via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 27 V threshold to error amplifier input. Use Value: Maintains ±1.9 V regulation accuracy across line/load transients and 25–85 °C ambient, enabling tight output tolerance. |
Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 27 V in industrial sensor interfaces. IC Role / Device Role / Timing Role: Fast-acting clamp limiting voltage excursion before damage occurs. Use Value: Responds within nanoseconds to 8×20 μs pulses up to 225 W peak power, preventing latch-up or gate oxide rupture. |
| Portable Device Battery Monitor | High-Density PCB Voltage Rail Stabilization |
Use Scenario: Providing stable reference for analog-to-digital conversion of Li-ion battery pack voltage in Bluetooth earbuds. IC Role / Device Role / Timing Role: Low-current Zener reference feeding ADC input divider network. Use Value: Draws only 0.05 μA leakage at 21.2 V, extending battery life while delivering 27 V reference with <1% drift over shelf life. |
Use Scenario: Stabilizing 27 V auxiliary rail in FPGA-based telecom baseband board with >2000 components/in² density. IC Role / Device Role / Timing Role: Local shunt regulator compensating for IR drop and noise on distributed power plane. Use Value: 80 Ω dynamic impedance suppresses ripple below 10 mVpp at 100 kHz, meeting FPGA core voltage noise floor requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C27ET1G | No AEC-Q101 qualification; identical electrical specs and SOT-23 pinout | Not approved for automotive systems requiring PPAP documentation or extended temperature validation | Select when cost sensitivity outweighs automotive compliance needs and full lifecycle support is not required |
| MMSZ4688T1G | 27 V nominal, but higher ZZT (100 Ω @ 5 mA) and wider VZ tolerance (25.7–28.3 V) | Lower regulation precision; suitable for non-critical biasing where ±5% voltage error is acceptable | Choose for legacy designs using MMSZ series footprints or where tighter thermal coefficient is not needed |
Compared with SZBZX84C27ET1G, BZX84C27ET1G offers identical regulation performance without automotive qualification, while MMSZ4688T1G trades precision for broader availability and lower unit cost in non-automotive consumer applications.
Availability
SZBZX84C27ET1G is available at Aetrix Electronics and suitable for automotive infotainment power management, industrial sensor signal conditioning, and portable medical device voltage reference applications requiring stable component supply and long-term sourcing continuity.
Supply support for SZBZX84C27ET1G 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 BZX84CxxxET1G/SZBZX84CxxxET1G series was developed to provide compact, high-reliability Zener regulation for space-constrained and mission-critical electronics, emphasizing AEC-Q101 compliance and robust parametric stability.
FAQ
What is the nominal Zener voltage and tolerance of SZBZX84C27ET1G?
The SZBZX84C27ET1G has a nominal Zener voltage of 27 V with a minimum of 25.1 V and maximum of 28.9 V at 5 mA test current. This ±1.9 V tolerance reflects manufacturing variation and ensures predictable regulation behavior across production lots while maintaining compatibility with standard 27 V system thresholds.
Is SZBZX84C27ET1G suitable for automotive applications?
Yes, SZBZX84C27ET1G is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications including engine control units, ADAS power supplies, and infotainment system voltage references. Its qualification covers temperature cycling, humidity testing, and mechanical shock per automotive reliability standards.
What is the maximum power dissipation of SZBZX84C27ET1G on an FR-5 board?
SZBZX84C27ET1G delivers 250 mW total power dissipation on FR-5 board at 25 °C ambient, derating linearly at 2.0 mW/°C above that temperature. This rating assumes standard JEDEC-defined board layout and enables safe operation in handheld and portable equipment with limited airflow.
How does the temperature coefficient affect SZBZX84C27ET1G performance?
The SZBZX84C27ET1G exhibits a temperature coefficient of +18.9 mV/°C at 5 mA, meaning its Zener voltage increases by approximately 18.9 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 is the pin configuration and polarity marking for SZBZX84C27ET1G?
SZBZX84C27ET1G uses SOT-23 package with Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode. The cathode is marked by a visible polarity band on the package body, and Pin 2 must remain unconnected on the PCB to prevent mechanical stress or parasitic coupling.
SZBZX84C27ET1G 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):
- 27 V
- Tolerance:
- ±7%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.9 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)
SZBZX84C27ET1G FAQ
1.How can I place an order for SZBZX84C27ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C27ET1G 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 SZBZX84C27ET1G reliable?
The price and inventory of SZBZX84C27ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C27ET1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C27ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C27ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C27ET1G?
SZBZX84C27ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C27ET1G 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 SZBZX84C27ET1G?
For technical support, including SZBZX84C27ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C27ET1G requirements.
6.How does Aetrix verify that SZBZX84C27ET1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C27ET1G 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 SZBZX84C27ET1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C27ET1G?
All SZBZX84C27ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C27ET1G, 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 SZBZX84C27ET1G part is unused and in its original packaging.
Return procedure for SZBZX84C27ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C27ET1G Tags
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