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onsemi BZX84C15LT1
- Part No.:
- BZX84C15LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C15LT1.pdf
- Description:
- DIODE ZENER 15V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:7,183
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Product details
Overview
BZX84C15LT1 from onsemi is a 15 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation at 25°C on FR-5 board, with 30 Ω dynamic impedance at 5 mA test current and 0.05 µA reverse leakage at 10.5 V. It provides precision voltage regulation in space-constrained portable electronics.
For engineers reviewing the BZX84C15LT1 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (15 V), tolerance (±5%), thermal resistance (556 °C/W), ESD rating (>16 kV HBM), and SOT-23 footprint compatibility with automated assembly.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at its specified Zener level. Its cathode-anode polarity is marked by a band, and terminal 2 is internally unconnected - not a functional pin.
Designed for low-power regulation, it delivers stable 15 V reference under 5 mA test current (IZT), with temperature coefficient of +9.2 mV/°C and capacitance of 110 pF at 0 V bias and 1 MHz, making it suitable for noise-sensitive analog signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.3–15.8 V @ 5 mA - ensures regulated output within ±5% of 15 V under standard test conditions |
| Power Dissipation | 225 mW on FR-5 board @ 25°C - defines maximum continuous power handling before thermal derating begins |
| Zener Impedance (ZZT) | 30 Ω @ 5 mA - indicates low dynamic resistance for stable regulation under varying load currents |
| Reverse Leakage Current | 0.05 µA @ 10.5 V - confirms minimal off-state current, critical for battery-powered standby circuits |
| Temperature Coefficient | +9.2 mV/°C @ 5 mA - quantifies voltage drift with ambient temperature change, enabling thermal error budgeting |
| Capacitance | 110 pF @ 0 V, 1 MHz - impacts high-frequency bypass and noise filtering capability in RF-adjacent designs |
| ESD Rating | Class 3 (>16 kV) per HBM - supports robust handling during PCB assembly and end-use in handheld devices |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting construction with corrosion-resistant finish, UL 94 V-0 flammability rating, and 260°C max soldering temperature for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward-biased terminal; connects to lower-potential node in regulation circuit |
| 2 | No Connection | Internally unconnected lead - must not be soldered or used in layout |
| 3 | Cathode | Reverse-biased terminal; marked by polarity band, connects to regulated output node |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free Compliant Packaging | RoHS-compliant SOT-23 construction (G-suffix variant available), supporting environmentally regulated production |
| High-Density Mounting | Small outline (2.80 × 1.20 × 0.99 mm) enables placement on high-density PCBs without sacrificing thermal margin |
| Automated Assembly Optimized | Transfer-molded case geometry and lead coplanarity ensure reliable pick-and-place and reflow yield |
| Tight Thermal Stability | Specified junction temperature range of −65°C to +150°C supports operation in extended industrial environments |
| Low-Leakage Regulation | Sub-100 nA leakage at VR = 10.5 V enables use in ultra-low-power monitoring and reference divider networks |
Applications
| Smartphone Power Management | IoT Sensor Reference |
|---|---|
Use Scenario: Providing stable 15 V bias for RF front-end amplifiers and PMIC feedback loops in compact mobile handsets. IC Role / Device Role / Timing Role: Voltage reference and overvoltage clamp protecting sensitive transceiver ICs from supply rail transients. Use Value: Enables consistent amplifier gain and linearity across battery discharge cycles while occupying <1 mm² PCB area. | Use Scenario: Generating precise 15 V reference for 16-bit ADC input scaling in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Passive Zener shunt regulator establishing known reference potential for analog signal conditioning stages. Use Value: Delivers <0.5% initial accuracy and <10 ppm/°C effective TC when combined with matched resistor dividers. |
| Industrial PLC Input Protection | USB-C PD Feedback Network |
Use Scenario: Clamping 24 V field bus inputs to protect microcontroller GPIOs and optocoupler drivers in factory automation modules. IC Role / Device Role / Timing Role: Overvoltage suppression element placed between input terminal and ground, absorbing transient energy. Use Value: Withstands >16 kV HBM ESD events and limits clamped voltage to ≤15.8 V, preventing latch-up in downstream logic. | Use Scenario: Setting feedback threshold in secondary-side voltage regulation circuits for USB-C Power Delivery adapters. IC Role / Device Role / Timing Role: Precision Zener in TL431-like shunt regulator configuration controlling optocoupler LED current. Use Value: Achieves ±1% output voltage tolerance over temperature due to predictable +9.2 mV/°C TC and low ZZT. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5245BLT1 | 15 V nominal, ±5%, 225 mW, but higher ZZT (35 Ω @ 5 mA) and lower ESD rating (Class 2, >8 kV) | Less suitable for ESD-prone handheld interfaces; acceptable in cost-sensitive industrial controls | Select when ESD robustness is secondary to unit cost and legacy design reuse |
| BZX84C15-7-F | Same 15 V/±5%/225 mW spec, but Diodes Inc. packaging with different marking and tape/reel logistics (7-inch reel vs. 8-inch) | Drop-in replacement electrically, but requires validation of solder paste profile due to minor thermal mass variation | Choose for dual-sourcing flexibility where onsemi supply continuity is constrained |
Compared with BZX84C15LT1, MMBZ5245BLT1 trades ESD immunity for marginal cost reduction, while BZX84C15-7-F offers identical electrical behavior with alternate supply-chain logistics - neither is pin-compatible in the strictest sense due to differing manufacturer-specific SOT-23 leadform tolerances.
Availability
BZX84C15LT1 is available at Aetrix Electronics and suitable for smartphone power management, IoT sensor reference, and industrial PLC input protection requiring stable component supply and RoHS-compliant sourcing.
Supply support for BZX84C15LT1 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The BZX84CxxxLT1 series was designed specifically for space-constrained voltage regulation in portable and high-density electronics, emphasizing low-profile packaging, automated assembly readiness, and robust ESD performance.
FAQ
What is the exact Zener voltage tolerance for BZX84C15LT1?
The BZX84C15LT1 has a nominal Zener voltage of 15 V with a tolerance of ±5%, meaning its measured reverse breakdown voltage falls between 14.3 V and 15.8 V when tested at 5 mA (IZT) and 25°C ambient temperature, as confirmed in the Electrical Characteristics table on page 3 of the official datasheet.
Is terminal 2 of BZX84C15LT1 electrically functional?
No, terminal 2 of the BZX84C15LT1 is explicitly designated as "No Connection" in the Pinout section (page 7) and Electrical Characteristics tables. It is an unconnected lead within the SOT-23 package and must not be soldered or used in circuit design - only pins 1 (anode) and 3 (cathode) are active.
What is the maximum allowable power dissipation for BZX84C15LT1 at 70°C ambient?
At 70°C ambient, the BZX84C15LT1's power dissipation must be derated linearly from its 225 mW rating at 25°C. Using the specified derating factor of 1.8 mW/°C, the allowable power is 225 mW − (1.8 mW/°C × 45°C) = 144 mW - verified in the Maximum Ratings table under "Derated above 25°C".
Does BZX84C15LT1 meet RoHS requirements?
Yes, the BZX84C15LT1 complies with RoHS directives. The datasheet explicitly states "Pb−Free Packages are Available", and the "G" suffix variant (BZX84C15LT1G) is designated as Pb-free. Standard BZX84C15LT1 units manufactured post-2004 conform to lead-free assembly standards per onsemi's compliance documentation.
How does the temperature coefficient affect BZX84C15LT1's regulation accuracy over −40°C to +85°C?
With a specified temperature coefficient of +9.2 mV/°C at 5 mA, the BZX84C15LT1's Zener voltage shifts approximately +0.46 V over a 50°C span (e.g., from 25°C to 75°C). This equates to ~3% full-scale drift - a critical factor when designing precision references, requiring compensation or calibration if sub-1% total error is required across that range.
BZX84C15LT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- BZX84CxxxLT1
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±6%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 30 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
BZX84C15LT1 FAQ
1.How can I place an order for BZX84C15LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C15LT1 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 BZX84C15LT1 reliable?
The price and inventory of BZX84C15LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C15LT1 is usually 5 days.
3.What payment methods are accepted for BZX84C15LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C15LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C15LT1?
BZX84C15LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C15LT1 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 BZX84C15LT1?
For technical support, including BZX84C15LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C15LT1 requirements.
6.How does Aetrix verify that BZX84C15LT1 is sourced from the original manufacturer or authorized distributors?
All BZX84C15LT1 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 BZX84C15LT1 meets industry standards.
7.What is the process for return or replacement of BZX84C15LT1?
All BZX84C15LT1 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C15LT1, 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 BZX84C15LT1 part is unused and in its original packaging.
Return procedure for BZX84C15LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C15LT1 Tags
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MM5Z5V1ST1G
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