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onsemi SZBZX84C22LT1G
- Part No.:
- SZBZX84C22LT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C22LT1G.pdf
- Description:
- DIODE ZENER 22V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,439
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Product details
Overview
SZBZX84C22LT1G from onsemi is a 22 V ±5% Zener diode in SOT-23 package, rated for 250 mW power dissipation at 25°C on FR-5 board, with 55 Ω dynamic impedance at 5 mA test current and 0.05 µA reverse leakage at 17.6 V. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the SZBZX84C22LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener tolerance (±5%), thermal coefficient (+15.4 mV/°C), ESD robustness (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates in reverse-biased breakdown mode to maintain stable voltage across its cathode-anode terminals. Its nominal 22 V regulation is specified at IZT = 5 mA, with Zener impedance measured under AC superimposed on DC bias (f = 1 kHz).
The SOT-23 package features pin 1 (anode), pin 2 (no connection), and pin 3 (cathode), enabling unidirectional clamping with polarity band identification. It meets AEC-Q101 for automotive use and is Pb-free/RoHS compliant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 20.8–23.3 V at 5 mA - defines regulated output range 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 | 55 Ω at 5 mA - determines voltage deviation under load transients |
| Reverse Leakage | 0.05 µA at 17.6 V - ensures minimal quiescent current in standby clamping applications |
| Temperature Coefficient | +15.4 mV/°C - quantifies voltage drift per degree Celsius rise above 25°C |
| Capacitance | 85 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) - supports robust handling in automated assembly and end-use environments |
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; UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during regulation |
| 2 | No Connection | Internally unconnected; must remain floating in PCB layout |
| 3 | Cathode | Connected to higher-potential node; voltage reference point during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability and PPAP compliance |
| Tight thermal stability | +15.4 mV/°C coefficient enables predictable voltage shift across −65°C to +150°C junction range |
| High ESD immunity | Class 3 Human Body Model (>16 kV) reduces risk of field failure in handheld devices |
| Pb-free & RoHS compliance | Meets global environmental regulations without compromising solderability or thermal performance |
| Optimized for automated assembly | SOT-23 footprint and marking design support high-yield pick-and-place and reflow processes |
Applications
| Smartphone Power Rail Protection | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Clamping transient spikes on 24 V supply lines feeding microcontroller I/O rails. IC Role / Device Role / Timing Role: Voltage clamp protecting downstream logic from overvoltage events. Use Value: Limits rail excursion to ≤23.3 V while drawing <0.05 µA leakage at nominal 17.6 V bias. |
Use Scenario: Providing stable 22 V reference for analog sensor signal conditioning in cabin temperature sensors. IC Role / Device Role / Timing Role: Precision voltage reference with AEC-Q101 validation for functional safety-critical subsystems. Use Value: Maintains ±5% regulation over temperature and lifetime, supporting ASIL-B compatible designs. |
| USB-C Port Overvoltage Protection | Industrial IoT Sensor Node Biasing |
Use Scenario: Safeguarding USB-C PD controller ICs against 20–24 V surges during hot-plug events. IC Role / Device Role / Timing Role: Fast-response shunt regulator absorbing energy during fault conditions. Use Value: Activates within nanoseconds at 20.8 V, limiting peak voltage to 23.3 V with 55 Ω dynamic impedance. |
Use Scenario: Generating local 22 V bias for MEMS pressure transducer excitation in battery-powered edge nodes. IC Role / Device Role / Timing Role: Low-quiescent-current voltage source enabling multi-year operation on coin cells. Use Value: Draws only 0.05 µA leakage at 17.6 V, minimizing standby power loss in always-on sensing modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C22LT1G | Same electrical specs but lacks AEC-Q101 qualification and automotive traceability; no SZ prefix | Not suitable for automotive production; acceptable for consumer portables and industrial prototypes | Select when cost sensitivity outweighs automotive compliance requirements |
| SZBZX84C22LT3G | Identical electrical and mechanical specs; differs only in tape-and-reel packaging (10,000 pcs vs. 3,000 pcs) | No functional difference; used where high-volume automated assembly requires larger reels | Select for large-batch manufacturing with optimized feeder setup |
Compared with SZBZX84C22LT1G, BZX84C22LT1G offers identical regulation performance but omits automotive qualification, while SZBZX84C22LT3G provides identical functionality in higher-volume packaging-enabling direct substitution in non-automotive contexts or scaled production runs without circuit redesign.
Availability
SZBZX84C22LT1G is available at Aetrix Electronics and suitable for smartphone power protection, automotive body control modules, and industrial IoT sensor biasing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SZBZX84C22LT1G 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
SZBZX84C22LT1G belongs to the BZX84CxxxLT1G Zener regulator family, designed specifically for space-constrained, high-reliability voltage reference and overvoltage protection in portable and automotive systems.
FAQ
What is the Zener voltage tolerance of SZBZX84C22LT1G?
The SZBZX84C22LT1G has a nominal Zener voltage of 22 V with a tolerance of ±5%, meaning its regulated voltage falls between 20.8 V and 23.3 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.
Does SZBZX84C22LT1G have a no-connect pin, and how should it be handled on the PCB?
Yes, SZBZX84C22LT1G has pin 2 designated as "No Connection" per the mechanical outline (Style 8) and Electrical Characteristics table. This terminal is internally unconnected and must remain unattached on the PCB-neither routed nor tied to ground or any other net-to avoid unintended parasitic paths or assembly defects.
Is SZBZX84C22LT1G qualified for automotive applications?
Yes, SZBZX84C22LT1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the Features section of the onsemi datasheet. The "SZ" prefix denotes compliance with automotive-specific site and control change requirements, distinguishing it from the commercial-grade BZX84C22LT1G variant.
What is the maximum power dissipation of SZBZX84C22LT1G on an FR-5 board?
SZBZX84C22LT1G is rated for 250 mW total power dissipation on FR-5 board at TA = 25°C, with thermal derating of 2.0 mW/°C above that ambient temperature. This value is specified in the Maximum Ratings table (page 2) and forms the basis for safe continuous operation in thermally constrained layouts.
How does the temperature coefficient affect SZBZX84C22LT1G's regulation accuracy?
The SZBZX84C22LT1G exhibits a positive temperature coefficient of +15.4 mV/°C at IZT = 5 mA, meaning its Zener voltage increases linearly with junction temperature. For example, a 50°C rise above 25°C adds ~770 mV to the nominal 22 V, resulting in ~22.77 V regulation-critical for precision reference designs requiring thermal compensation.
SZBZX84C22LT1G 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):
- 22 V
- Tolerance:
- ±6%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.4 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)
SZBZX84C22LT1G FAQ
1.How can I place an order for SZBZX84C22LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C22LT1G 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 SZBZX84C22LT1G reliable?
The price and inventory of SZBZX84C22LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C22LT1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C22LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C22LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C22LT1G?
SZBZX84C22LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C22LT1G 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 SZBZX84C22LT1G?
For technical support, including SZBZX84C22LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C22LT1G requirements.
6.How does Aetrix verify that SZBZX84C22LT1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C22LT1G 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 SZBZX84C22LT1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C22LT1G?
All SZBZX84C22LT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C22LT1G, 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 SZBZX84C22LT1G part is unused and in its original packaging.
Return procedure for SZBZX84C22LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C22LT1G Tags
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