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Diodes Incorporated BZX84C15TA
- Part No.:
- BZX84C15TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C15TA.pdf
- Description:
- DIODE ZENER 15V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,831
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Product details
Overview
BZX84C15TA from Diodes Incorporated is a 350mW surface-mount Zener diode with nominal zener voltage 15V (13.8–15.6V range), 30Ω maximum zener impedance at 5mA test current, and 10.5V minimum knee voltage. It operates in reverse-bias regulation mode for voltage reference and overvoltage protection in low-power analog circuits, power supply feedback loops, and sensor biasing networks.
For engineers reviewing the BZX84C15TA datasheet, BZX84C15TA pinout, BZX84C15TA application, or BZX84C15TA equivalent, key selection criteria include zener voltage tolerance, dynamic impedance at specified test current, power derating above +25°C, thermal resistance (357°C/W), and SOT23 package compatibility with automated pick-and-place assembly.
Technical Context
This device uses planar die construction to ensure stable breakdown characteristics and low leakage across temperature. Its 15V nominal zener voltage is achieved with a 5mA test current and exhibits a positive temperature coefficient of +9.2mV/°C - enabling predictable drift compensation in precision references.
The SOT23 package provides low thermal resistance (357°C/W) under ambient-terminated conditions and supports full RoHS compliance with halogen- and antimony-free green molding compound. Reverse current remains ≤0.1µA at 13.0V, confirming tight regulation threshold control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15V nominal (13.8–15.6V range at IZT = 5mA); defines precise clamping level for voltage regulation |
| Power Dissipation | 350mW at TA = +25°C; derates linearly above 25°C per Fig.1 curve |
| Zener Impedance (ZZT) | ≤30Ω at IZT = 5mA; ensures minimal output voltage variation under load transients |
| Knee Voltage (VZK) | 10.5V at IZK = 1.0mA; establishes usable regulation onset point below nominal VZ |
| Reverse Leakage (IR) | ≤0.1µA at VR = 13.0V; guarantees low standby current in high-impedance bias networks |
| Temperature Coefficient | +9.2mV/°C; enables predictable VZ drift for temperature-compensated designs |
| Package | SOT23; 3-pin surface-mount outline with 0.915mm body width and 2.4mm length - compatible with standard reflow profiles |
Pinout & Package
Package: SOT23 - molded plastic case, UL 94V-0 rated, matte tin-plated alloy 42 leadframe, polarity indicated by cathode band on top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Forward conduction terminal | Connected to lower-potential node in reverse-bias regulation configuration |
| Pin 2 (Cathode) | Zener breakdown terminal | Connected to regulated voltage rail; marked by cathode band on package top |
| Pin 3 (Anode) | Redundant anode connection | Internally tied to Pin 1; improves thermal and mechanical robustness in SOT23 layout |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables repeatable breakdown voltage and low parameter drift over lifetime |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling and HTRB stress |
| Green molding compound | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb); meets RoHS 3 and JEDEC MSL Level 1 |
| Automated assembly optimized | Standard SOT23 footprint and lead finish support high-yield placement and reflow soldering |
| Low thermal resistance | 357°C/W junction-to-ambient (with terminals held at ambient); enables stable operation without heatsinking |
Applications
| Power Supply Feedback | Sensor Bias Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or buck converter feedback paths using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Zener diode acts as precision voltage reference for TL431-type shunt regulators or direct feedback node clamp. Use Value: 15V nominal rating matches common 12V system auxiliary rails; ±0.6V tolerance ensures stable regulation within ±4% error band. |
Use Scenario: Provides stable bias voltage for analog sensors (e.g., RTDs, bridge-based pressure transducers) operating from unregulated 15–24V supplies. IC Role / Device Role / Timing Role: Functions as low-current voltage reference source in high-impedance divider networks feeding instrumentation amplifiers. Use Value: 0.1µA max reverse leakage at 13V prevents loading errors in µA-level bias circuits; 30Ω dynamic impedance minimizes noise coupling. |
| Overvoltage Clamp | ESD Protection Interface |
Use Scenario: Protects microcontroller I/O pins or ADC inputs against transient surges in industrial control modules exposed to inductive switching noise. IC Role / Device Role / Timing Role: Zener diode clamps fast-rising transients (>10ns) to safe levels before they reach sensitive CMOS inputs. Use Value: 15V clamping threshold aligns with 3.3V/5V logic rail overvoltage margins; 350mW rating handles short-duration 100ns pulses up to 350mJ. |
Use Scenario: Integrated into USB or CAN bus interface PCBs as secondary ESD suppression element downstream of primary TVS arrays. IC Role / Device Role / Timing Role: Absorbs residual low-energy ESD events (IEC 61000-4-2 Level 2) after front-end protection has triggered. Use Value: Low capacitance (~2pF at 0V) avoids signal integrity degradation on 12Mbps CAN or 480Mbps USB 2.0 lines; SOT23 footprint enables compact layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5245B (ON Semiconductor) | 15V nominal, 225mW rating, 30Ω ZZT, SOT23 package | Lower power rating limits use in sustained clamp scenarios; higher RθJA (450°C/W) | Select when cost sensitivity outweighs power margin requirements and thermal budget allows |
| BZX84-C15 (Nexperia) | 15V nominal, 350mW, 30Ω ZZT, identical SOT23 footprint and marking code Y4 | No functional difference; AEC-Q101 qualification not explicitly stated in public datasheet | Preferred for non-automotive volume production where Diodes Inc. supply continuity is constrained |
Compared with MMBZ5245B and BZX84-C15, BZX84C15TA offers verified AEC-Q101 qualification, tighter thermal resistance (357°C/W vs. 450°C/W), and documented green compound compliance - making it optimal for automotive and industrial applications requiring long-term reliability assurance.
Availability
BZX84C15TA is available at Aetrix Electronics and suitable for power supply feedback, sensor bias reference, overvoltage clamp, and ESD protection interface applications requiring stable component supply and consistent parametric performance across production lots.
Supply support for BZX84C15TA 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
BZX84C15TA belongs to the BZX84C series of 350mW Zener diodes designed specifically for high-reliability voltage regulation and protection in automotive, industrial, and consumer power management systems.
FAQ
What is the maximum continuous power dissipation for BZX84C15TA at +70°C ambient?
At +70°C ambient, BZX84C15TA's power dissipation must be derated linearly from 350mW at +25°C. Using the 357°C/W thermal resistance, the allowable power is 350mW × (1 − (70−25)/357) ≈ 220mW. This value assumes terminals are held at ambient temperature per Note 7 in DS18001 Rev. 33-2.
Does BZX84C15TA have a specified total capacitance value?
While no single capacitance value is listed for BZX84C15TA in the datasheet, Figure 5 shows typical total capacitance for 15V devices is ~2pF at 0V reverse bias and ~1.5pF at 1V reverse bias. This low capacitance supports use in high-frequency signal path protection without bandwidth degradation.
Is BZX84C15TA suitable for use in life support equipment?
No. Diodes Incorporated explicitly prohibits use of BZX84C15TA in life support devices or systems without express written approval from its CEO. The device is not certified to ISO 13485 or IEC 62304, and its qualification scope excludes safety-critical medical applications per the "LIFE SUPPORT" notice in DS18001.
How does the temperature coefficient affect regulation accuracy over −40°C to +125°C?
With a +9.2mV/°C coefficient, BZX84C15TA's zener voltage shifts approximately +1.5V across −40°C to +125°C (ΔT = 165°C). At +125°C, VZ ≈ 16.5V; at −40°C, VZ ≈ 13.5V. This 20% span requires compensation in precision references but remains acceptable for general-purpose clamping.
BZX84C15TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84C15TA FAQ
1.How can I place an order for BZX84C15TA through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C15TA 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 BZX84C15TA reliable?
The price and inventory of BZX84C15TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C15TA is usually 5 days.
3.What payment methods are accepted for BZX84C15TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C15TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C15TA?
BZX84C15TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C15TA 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 BZX84C15TA?
For technical support, including BZX84C15TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C15TA requirements.
6.How does Aetrix verify that BZX84C15TA is sourced from the original manufacturer or authorized distributors?
All BZX84C15TA 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 BZX84C15TA meets industry standards.
7.What is the process for return or replacement of BZX84C15TA?
All BZX84C15TA units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C15TA, 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 BZX84C15TA part is unused and in its original packaging.
Return procedure for BZX84C15TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C15TA Tags
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