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onsemi SZBZX84C15LT3
- Part No.:
- SZBZX84C15LT3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C15LT3.pdf
- Description:
- DIODE ZENER 15V 250MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:44,677
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Product details
Overview
SZBZX84C15LT3 from onsemi is a 15 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 30 Ω dynamic impedance at 5 mA test current and 0.05 µA reverse leakage at 12 V, used for voltage regulation in space-constrained portable electronics.
For engineers reviewing the SZBZX84C15LT3 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (15 V), tolerance (±5%), power rating (225 mW), dynamic impedance (30 Ω @ 5 mA), temperature coefficient (+9.2 mV/°C), and SOT-23 package compatibility with automated assembly.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in silicon PN junction. It delivers stable 15 V regulation across 1 mA to 20 mA Zener current range, with specified performance at 25°C ambient and validated operation from −65°C to +150°C junction temperature.
Its SOT-23 package features cathode-indicated polarity band, Pb-free construction (G-suffix compatible), and UL 94 V-0 flammability rating. Thermal resistance is 556°C/W on FR-5 board and 417°C/W on alumina substrate, supporting thermal design in high-density layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 15 V nominal, min 13.8 V / max 15.6 V @ 5 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation | 225 mW on FR-5 board @ 25°C - sets maximum continuous DC power handling before thermal derating begins |
| Zener Impedance | 30 Ω @ 5 mA - determines output voltage stability under varying load current |
| Reverse Leakage | 0.05 µA @ 12 V - ensures minimal standby current in voltage-clamp or reference applications |
| Temperature Coefficient | +9.2 mV/°C @ 5 mA - quantifies voltage drift per degree Celsius change in junction temperature |
| Capacitance | 110 pF @ 0 V, 1 MHz - impacts high-frequency noise filtering and signal integrity in bypass roles |
| ESD Rating | Class 3 (>16 kV) HBM - supports robustness in handheld and portable assembly environments |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting epoxy, corrosion-resistant finish, 260°C soldering tolerance for 10 seconds, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential side of regulated circuit; forward-biased during conduction |
| 2 | No Connection | Internally unconnected; electrically isolated from die; no PCB trace required |
| 3 | Cathode | Connected to higher-potential side; Zener breakdown occurs between Cathode and Anode |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating on FR-5 Board | Enables compact voltage regulation without external heat sinking in standard PCB materials |
| ESD Rating >16 kV (HBM Class 3) | Reduces need for additional ESD protection in consumer handheld designs |
| Tight Thermal Resistance Control (556°C/W) | Supports predictable thermal modeling for reliability in high-density layouts |
| Pb-Free Packaging Option (G-suffix) | Fulfills RoHS compliance requirements without sacrificing mechanical or thermal performance |
| AEC-Q101 Qualified | Validates suitability for automotive electronics where reliability and qualification rigor are mandatory |
Applications
| Cellular Phone Power Management | Handheld Portable Voltage Reference |
|---|---|
Use Scenario: Regulating bias voltage for RF front-end ICs and sensor interfaces in LTE/5G smartphones. IC Role / Device Role / Timing Role: Zener diode providing stable 15 V reference for analog subsystems and LDO enable thresholds. Use Value: Maintains ±5% output accuracy across −30°C to +85°C operating range while occupying <1 mm² PCB area. | Use Scenario: Setting precise trigger thresholds in battery-powered medical diagnostic pens and glucose meters. IC Role / Device Role / Timing Role: Two-terminal shunt regulator establishing known voltage node for comparator inputs and ADC references. Use Value: Delivers 0.05 µA leakage at 12 V, minimizing battery drain in always-on monitoring circuits. |
| High-Density PC Board Clamping | Automotive Body Control Module (BCM) |
Use Scenario: Overvoltage protection for I²C bus lines and microcontroller GPIOs on mini-ITX and NUC form-factor motherboards. IC Role / Device Role / Timing Role: Transient voltage clamp limiting signal line excursions to 15 V during ESD events. Use Value: Leverages Class 3 HBM rating and 110 pF capacitance to suppress fast transients without distorting 400 kHz I²C timing. | Use Scenario: Providing stable 15 V supply rail for LIN transceiver biasing and LED driver feedback networks in door module ECUs. IC Role / Device Role / Timing Role: AEC-Q101 qualified Zener regulating auxiliary rails where cost-sensitive discrete solutions replace integrated regulators. Use Value: Ensures operation across −40°C to +125°C ambient with +9.2 mV/°C TC compensated in system-level calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C15LT3 | Standard tolerance (±5%), 225 mW, SOT-23, non-automotive grade marking | General-purpose industrial and consumer use; not AEC-Q101 certified | Select when cost sensitivity outweighs automotive qualification requirements |
| SZBZX84C15LT3G | Identical electrical specs, Pb-free packaging, AEC-Q101 qualified, G-suffix marking | Required for automotive production; supports lead-free reflow and PPAP documentation | Choose for Tier 1 automotive programs needing full compliance traceability |
Compared with BZX84C15LT3 and SZBZX84C15LT3G, the SZBZX84C15LT3 offers identical Zener characteristics and SOT-23 footprint but carries the SZ prefix indicating automotive-grade site control and change management-enabling seamless transition from industrial to automotive BOMs without redesign.
Availability
SZBZX84C15LT3 is available at Aetrix Electronics and suitable for cellular phone power management, handheld portable voltage reference, and high-density PC board clamping requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for SZBZX84C15LT3 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 (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The BZX84CxxxLT1/SZBZX84CxxxLT1G series was designed specifically for space-constrained voltage regulation and overvoltage protection in portable and automotive electronics, emphasizing low-profile SOT-23 packaging, high ESD robustness, and AEC-Q101 qualification.
FAQ
What is the Zener voltage tolerance of SZBZX84C15LT3?
The SZBZX84C15LT3 has a nominal Zener voltage of 15 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 13.8 V and 15.6 V when tested at 5 mA Zener current and 25°C ambient temperature. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet for the BZX84CxxxLT1 series. The SZBZX84C15LT3 maintains this specification across its qualified operating temperature range.
Does SZBZX84C15LT3 have a connection on pin 2?
No, pin 2 of the SZBZX84C15LT3 is internally unconnected (NC). The device uses only pins 1 (Anode) and 3 (Cathode) for electrical operation. This is explicitly stated in the Pinout section of the datasheet: "(Pinout: 1-Anode, 2-No Connection, 3-Cathode)". PCB layout must omit any trace or pad connection to pin 2 to avoid unintended coupling or mechanical stress.
What is the maximum power dissipation of SZBZX84C15LT3 on FR-5 board?
The maximum power dissipation of SZBZX84C15LT3 on FR-5 board is 225 mW at 25°C ambient temperature, with a derating factor of 1.8 mW/°C above that temperature. This value is specified in the Maximum Ratings table under "Total Power Dissipation on FR−5 Board" and directly governs thermal design margins in standard PCB assemblies. Exceeding this limit risks irreversible junction damage.
Is SZBZX84C15LT3 qualified for automotive applications?
Yes, the SZBZX84C15LT3 is AEC-Q101 qualified and PPAP capable, as confirmed in the Features section of the datasheet. The "SZ" prefix denotes automotive and other applications requiring unique site and control change requirements. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD-making it suitable for body control modules, infotainment power rails, and sensor interface circuits in production vehicles.
What is the reverse leakage current specification for SZBZX84C15LT3?
The reverse leakage current for SZBZX84C15LT3 is specified as 0.05 µA maximum at VR = 12 V and TA = 25°C. This parameter appears in the Electrical Characteristics table on page 3 under "Max Reverse Leakage Current" for the SZ/BZX84C15LT1/T3, G entry. It reflects the diode's ability to block current below its Zener knee, critical for low-power standby operation in battery-powered systems.
SZBZX84C15LT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.5 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)
SZBZX84C15LT3 FAQ
1.How can I place an order for SZBZX84C15LT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C15LT3 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 SZBZX84C15LT3 reliable?
The price and inventory of SZBZX84C15LT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C15LT3 is usually 5 days.
3.What payment methods are accepted for SZBZX84C15LT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C15LT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C15LT3?
SZBZX84C15LT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C15LT3 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 SZBZX84C15LT3?
For technical support, including SZBZX84C15LT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C15LT3 requirements.
6.How does Aetrix verify that SZBZX84C15LT3 is sourced from the original manufacturer or authorized distributors?
All SZBZX84C15LT3 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 SZBZX84C15LT3 meets industry standards.
7.What is the process for return or replacement of SZBZX84C15LT3?
All SZBZX84C15LT3 units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C15LT3, 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 SZBZX84C15LT3 part is unused and in its original packaging.
Return procedure for SZBZX84C15LT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C15LT3 Tags
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