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onsemi SZBZX84C27LT3G
- Part No.:
- SZBZX84C27LT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C27LT3G.pdf
- Description:
- DIODE ZENER 27V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
SZBZX84C27LT3G from onsemi is a 27 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 2 mA test current and 0.05 µA reverse leakage at 21.4 V. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the SZBZX84C27LT3G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal coefficient (+18.9 mV/°C), ESD rating (>16 kV HBM), and automotive-grade AEC-Q101 qualification.
Technical Context
This device operates as a two-terminal voltage regulator using avalanche breakdown in silicon PN junction. Its nominal 27 V Zener voltage is specified at IZT = 2 mA, with temperature coefficient of +18.9 mV/°C indicating positive drift above 25°C. The SOT-23 package enables surface-mount assembly on high-density PCBs while maintaining thermal resistance of 500°C/W on FR-5 substrate.
Designed for stable regulation under low-current conditions, it exhibits 300 Ω dynamic impedance at 10 mA and 70 pF capacitance at 0 V bias and 1 MHz - parameters critical for noise-sensitive analog references and transient suppression in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 25.1–28.9 V at 2 mA test current; ensures ±5% regulation window for 27 V nominal reference |
| Power Dissipation | 250 mW on FR-5 board at 25°C; defines maximum continuous DC power before thermal derating begins |
| Zener Impedance | 80 Ω at 2 mA; determines output voltage stability under load variation |
| Reverse Leakage | 0.05 µA at 21.4 V; sets minimum quiescent current in high-impedance bias networks |
| Temperature Coefficient | +18.9 mV/°C at 2 mA; quantifies voltage drift per degree Celsius rise above ambient |
| 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) per Human Body Model; qualifies for direct handling in unshielded assembly environments |
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. Cathode indicated by polarity band; maximum soldering temperature 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward-biased terminal during conduction; connects to lower-potential node in regulation path |
| 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or via allowed |
| 3 | Cathode | Zener breakdown terminal; connects to regulated voltage rail or clamping node |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control modules and body electronics requiring PPAP compliance |
| Pb-Free & RoHS Compliant | Meets EU Directive 2011/65/EU and JESD201A standards for lead-free soldering and environmental safety |
| Tight Thermal Stability | +18.9 mV/°C coefficient enables predictable voltage shift across −65°C to +150°C junction range |
| Low Capacitance | 70 pF at zero bias supports use in high-speed signal line protection without bandwidth degradation |
| High ESD Robustness | Class 3 HBM rating (>16 kV) eliminates need for external ESD protection in handheld interface circuits |
Applications
| Cellular Phone Power Management | Automotive Cabin Control Unit |
|---|---|
Use Scenario: Regulating reference voltage for battery fuel gauge ICs in LTE smartphones with 3.7 V Li-ion supply. IC Role / Device Role / Timing Role: Provides stable 27 V Zener reference for ADC calibration and voltage divider scaling. Use Value: Enables ±0.5% state-of-charge accuracy over temperature due to known +18.9 mV/°C drift compensation. | Use Scenario: Clamping transient spikes on LIN bus lines in HVAC control modules exposed to load dump events. IC Role / Device Role / Timing Role: Acts as bidirectional overvoltage protector between microcontroller GPIO and LIN transceiver. Use Value: Absorbs 250 mW pulses without failure, meeting ISO 7637-2 Pulse 1/2a immunity requirements. |
| Industrial Sensor Signal Conditioning | Medical Wearable Battery Monitoring |
Use Scenario: Stabilizing excitation voltage for 4–20 mA current loop transmitters in factory automation sensors. IC Role / Device Role / Timing Role: Supplies precise 27 V bias to op-amp feedback network for current source regulation. Use Value: Maintains <1% output current error across −40°C to +85°C ambient due to tight 25.1–28.9 V tolerance. | Use Scenario: Protecting low-power glucose meter MCU inputs from ESD during patient handling in home-use devices. IC Role / Device Role / Timing Role: Functions as input-stage ESD clamp on analog front-end ADC channels. Use Value: Survives >16 kV HBM discharges without parametric shift, preserving clinical measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C27LT3G | Standard tolerance (±5%), non-automotive grade, same SOT-23 package and 27 V rating | Lacks AEC-Q101 qualification and SZ-prefix traceability controls | Select when automotive PPAP or site-specific change control is not required |
| SZBZX84C27LT1G | Same AEC-Q101 qualification and electrical specs, but supplied in 3,000-piece tape-and-reel vs. 10,000-piece for LT3G | Identical performance; differs only in packaging quantity and reel orientation | Choose for prototyping or low-volume production where smaller reels reduce inventory holding cost |
Compared with BZX84C27LT3G and SZBZX84C27LT1G, the SZBZX84C27LT3G offers identical Zener characteristics and automotive qualification but delivers higher volume efficiency through its 10,000-unit tape-and-reel configuration - reducing line changeovers and material handling labor in high-throughput manufacturing.
Availability
SZBZX84C27LT3G is available at Aetrix Electronics and suitable for automotive cabin electronics, portable medical devices, industrial sensor interfaces, and battery management systems requiring stable component supply with full AEC-Q101 traceability.
Supply support for SZBZX84C27LT3G 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, and sensing technologies for automotive, industrial, and cloud infrastructure markets.
The SZBZX84CxxxLTxG series was developed to deliver AEC-Q101-qualified Zener regulation in ultra-small SOT-23 packages for space-constrained automotive and portable electronics applications.
FAQ
What is the Zener voltage tolerance of SZBZX84C27LT3G?
The SZBZX84C27LT3G has a Zener voltage tolerance of ±5%, with a specified range of 25.1 V to 28.9 V at 2 mA test current. This tolerance is defined per the BZX84Cxxx standard series and confirmed in the onsemi datasheet revision 23, page 3. The nominal 27 V rating makes SZBZX84C27LT3G suitable for precision reference designs where moderate regulation accuracy is required without tight-tolerance (B-series) cost premiums.
Is SZBZX84C27LT3G qualified for automotive applications?
Yes, SZBZX84C27LT3G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the onsemi datasheet section "Features" and ordering information table. The "SZ" prefix denotes automotive and other applications requiring unique site and control change requirements. This qualification covers temperature cycling, mechanical shock, and reliability testing per AEC standards, making SZBZX84C27LT3G appropriate for under-hood and cabin control modules.
What is the pin configuration of SZBZX84C27LT3G?
SZBZX84C27LT3G uses the SOT-23 package with pinout: Pin 1 = Anode, Pin 2 = No Connection (must remain unconnected), Pin 3 = Cathode. This configuration is documented in the "Mechanical Characteristics" section and confirmed in the "ELECTRICAL CHARACTERISTICS" tables on pages 3–4 of the onsemi datasheet. The cathode is marked by a polarity band on the package body.
What is the maximum power dissipation of SZBZX84C27LT3G on FR-5 board?
SZBZX84C27LT3G is rated for 250 mW total power dissipation on FR-5 board at 25°C ambient, with thermal derating of 2.0 mW/°C above that temperature. This value is listed in the "MAXIMUM RATINGS" table on page 2 of the onsemi datasheet. Exceeding this limit risks junction overheating and long-term reliability degradation, especially in enclosed enclosures without forced airflow.
Does SZBZX84C27LT3G have Pb-free and RoHS compliance?
Yes, SZBZX84C27LT3G is Pb-free and RoHS compliant, as confirmed in the "Features" section of the onsemi datasheet: "These Devices are Pb−Free and are RoHS Compliant." The "G" suffix in the part number explicitly denotes Pb-free packaging, and the device meets EU Directive 2011/65/EU requirements for hazardous substance restrictions in electronic equipment.
SZBZX84C27LT3G 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):
- 27 V
- Tolerance:
- ±7%
- Power - Max:
- 250 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)
SZBZX84C27LT3G FAQ
1.How can I place an order for SZBZX84C27LT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C27LT3G 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 SZBZX84C27LT3G reliable?
The price and inventory of SZBZX84C27LT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C27LT3G is usually 5 days.
3.What payment methods are accepted for SZBZX84C27LT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C27LT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C27LT3G?
SZBZX84C27LT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C27LT3G 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 SZBZX84C27LT3G?
For technical support, including SZBZX84C27LT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C27LT3G requirements.
6.How does Aetrix verify that SZBZX84C27LT3G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C27LT3G 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 SZBZX84C27LT3G meets industry standards.
7.What is the process for return or replacement of SZBZX84C27LT3G?
All SZBZX84C27LT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C27LT3G, 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 SZBZX84C27LT3G part is unused and in its original packaging.
Return procedure for SZBZX84C27LT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C27LT3G Tags
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