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Taiwan Semiconductor Corporation BZD17C47P
- Part No.:
- BZD17C47P
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZD17C47P.pdf
- Description:
- DIODE ZENER 47V 800MW SUB SMA
- Quantity:
- Payment:
- Shipping:
Inventory:5,526
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Product details
Overview
BZD17C47P from Taiwan Semiconductor is a 0.8 W surface-mount silicon Zener diode with a nominal zener voltage of 47 V (44–50 V range), 24 Ω typical dynamic resistance at 10 mA test current, and ±0.07 %/°C temperature coefficient-designed for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the BZD17C47P datasheet, BZD17C47P pinout, BZD17C47P application, or BZD17C47P equivalent, key selection criteria include its Sub SMA package thermal performance (RθJA = 180 °C/W), low leakage (<1.0 µA @ 36 V), and surge capability (300 W non-repetitive pulse, 100 µs).
Technical Context
The BZD17C47P operates as a single-die, unidirectional Zener diode in reverse-biased breakdown mode, with specified zener voltage tolerance (±3.2% at 47 V) and tight temperature coefficient (±0.07 %/°C). Its junction-to-lead thermal resistance is 30 °C/W, enabling stable operation up to 175 °C junction temperature.
It meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, confirming suitability for standard reflow assembly without baking. The cathode band polarity marking and matte tin-plated terminals comply with J-STD-002 solderability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 44–50 V (tight 47 V nominal; enables accurate 5 V or 3.3 V LDO reference scaling) |
| Test Current IZT | 10 mA (standard bias point for stable VZ measurement and circuit design) |
| Dynamic Resistance rdiff | 24 Ω typ. (low impedance ensures minimal output voltage shift under load variation) |
| Power Dissipation Ptot | 0.8 W @ TA = 25°C (requires 5 mm × 5 mm Cu pad for full rating; derates linearly above 25°C) |
| Reverse Leakage IR | <1.0 µA @ 36 V (ensures negligible quiescent current in high-impedance reference nodes) |
| Temp Coefficient αZ | ±0.07 %/°C (supports stable regulation across industrial -40°C to +125°C ambient) |
| Junction Temp Range | -55°C to +175°C (enables use in under-hood automotive or high-temp industrial enclosures) |
Pinout & Package
Package: Sub SMA - low-profile surface-mount package with cathode band marking, matte tin-plated leads, UL 94V-0 molding compound, and 0.019 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; defines reverse-bias orientation |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated node; voltage clamped to VZ when reverse biased above knee |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile Sub SMA package | Enables compact PCB layout in space-constrained power rails and feedback networks |
| Stable ±0.07 %/°C tempco | Minimizes drift-induced error in precision voltage references over temperature |
| 300 W non-repetitive surge rating | Withstands transient overvoltage events (e.g., ESD, inductive kickback) without degradation |
| Moisture Sensitivity Level 1 | Eliminates pre-bake requirement for standard SMT reflow, reducing manufacturing cost |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and global environmental directives for industrial and consumer products |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference diode providing precise 47 V clamp for TL431 or shunt regulator bias network. Use Value: Tight VZ tolerance and low rdiff ensure <±1% output regulation accuracy across line/load/temperature. | Use Scenario: Stabilizing excitation voltage for resistive bridge sensors (e.g., strain gauges, RTDs) in PLC analog input modules. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC reference divider or sensor bias rail. Use Value: ±0.07 %/°C tempco limits reference drift to <0.8 mV/°C, preserving 12-bit+ measurement integrity. |
| Overvoltage Protection Clamp | Microcontroller I/O Protection |
Use Scenario: Clamping induced transients on 24 V DC control lines in factory automation systems. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between signal line and ground. Use Value: 300 W peak pulse rating absorbs 100 µs surges per IEC 61000-4-5 Level 3 without failure. | Use Scenario: Protecting 3.3 V or 5 V microcontroller GPIO pins from accidental 12–24 V miswiring or ESD. IC Role / Device Role / Timing Role: Low-leakage Zener clamp limiting pin voltage to safe level during fault conditions. Use Value: <1.0 µA reverse leakage avoids loading sensitive I/O, while 47 V standoff prevents false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZX84-C47 | Same 47 V nominal VZ, but SOT-23 package (higher RθJA = 350 °C/W); 500 mW rating | Limited to lower-power, lower-thermal-stress designs; unsuitable for sustained 0.8 W dissipation | Select BZD17C47P for higher power handling and better thermal robustness in board-level regulators |
| Vishay NZX47C | Same Sub SMA package and 0.8 W rating, but wider VZ tolerance (±5%) and higher rdiff (35 Ω) | Acceptable for non-critical clamping, but less suitable for precision reference applications | Choose BZD17C47P where tighter VZ tolerance and lower dynamic resistance are required |
Compared with BZX84-C47 and NZX47C, the BZD17C47P delivers superior thermal performance (RθJA = 180 °C/W vs. 350/250 °C/W), tighter voltage tolerance (±3.2% vs. ±5%), and lower dynamic resistance-making it optimal for high-stability, medium-power Zener reference and clamp roles.
Availability
BZD17C47P is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, overvoltage protection circuits, and microcontroller I/O protection requiring stable component supply and long-term production continuity.
Supply support for BZD17C47P 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated Taiwanese semiconductor manufacturer specializing in discrete power devices, including Zener, TVS, rectifier, and MOSFET families.
The BZD17C series is part of TSC's high-reliability Zener diode product line, engineered for stable voltage reference and transient suppression in industrial, automotive, and power conversion applications.
FAQ
What is the exact zener voltage range for BZD17C47P?
The BZD17C47P has a guaranteed zener voltage range of 44 V to 50 V at 10 mA test current (IZT), with a nominal value of 47 V. This ±3.2% tolerance is confirmed in the official Taiwan Semiconductor datasheet revision L2103, Table "ELECTRICAL SPECIFICATIONS", row for BZD17C47P.
Does BZD17C47P support lead-free reflow soldering?
Yes, the BZD17C47P features matte tin-plated leads compliant with J-STD-002 solderability standards and is rated for lead-free reflow profiles. Its moisture sensitivity level is J-STD-020 Level 1, meaning no baking is required prior to assembly-fully compatible with standard Pb-free reflow processes.
What is the maximum surge power rating of BZD17C47P?
The BZD17C47P supports a non-repetitive peak pulse power dissipation of 300 W for a 100 µs square wave pulse, tested at TJ = 25°C. This rating is specified in the "ABSOLUTE MAXIMUM RATINGS" table and enables reliable transient suppression in industrial control and power supply applications.
Can BZD17C47P be used as a replacement for BZD17C43P or BZD17C51P?
No-BZD17C47P is not a functional replacement for BZD17C43P (40–46 V) or BZD17C51P (48–54 V), as their zener voltage ranges do not overlap. Each part in the BZD17CxxP family is uniquely binned; substituting requires verification of circuit voltage margin and regulation stability using the BZD17C47P's specific 44–50 V VZ.
What is the thermal resistance from junction to ambient for BZD17C47P?
The junction-to-ambient thermal resistance (RθJA) of BZD17C47P is 180 °C/W when mounted on a 5 mm × 5 mm copper pad, as specified in the "THERMAL PERFORMANCE" section of the Taiwan Semiconductor datasheet. This value assumes standard JEDEC test conditions and must be adjusted for actual PCB layout.
BZD17C47P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±6.38%
- Power - Max:
- 800 mW
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 36 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Sub SMA
BZD17C47P FAQ
1.How can I place an order for BZD17C47P through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD17C47P 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 BZD17C47P reliable?
The price and inventory of BZD17C47P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD17C47P is usually 5 days.
3.What payment methods are accepted for BZD17C47P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD17C47P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD17C47P?
BZD17C47P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD17C47P 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 BZD17C47P?
For technical support, including BZD17C47P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD17C47P requirements.
6.How does Aetrix verify that BZD17C47P is sourced from the original manufacturer or authorized distributors?
All BZD17C47P 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 BZD17C47P meets industry standards.
7.What is the process for return or replacement of BZD17C47P?
All BZD17C47P units undergo pre-shipment inspection (PSI). If there is an issue with BZD17C47P, 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 BZD17C47P part is unused and in its original packaging.
Return procedure for BZD17C47P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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