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Diodes Incorporated BZT52C3V9-13
- Part No.:
- BZT52C3V9-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C3V9-13.pdf
- Description:
- DIODE ZENER 3.9V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,658
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Product details
Overview
BZT52C3V9-13 from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 3.9 V, ±5% tolerance (3.7–4.1 V), 500 mW power dissipation at TL = +75°C, and 370 mW at TA = +25°C, used for precision voltage regulation and overvoltage protection in low-power analog circuits such as sensor biasing and reference generation.
For engineers reviewing the BZT52C3V9-13 datasheet, BZT52C3V9-13 pinout, BZT52C3V9-13 application, or BZT52C3V9-13 equivalent, key selection criteria include zener voltage accuracy at 5 mA test current, low dynamic impedance (90 Ω @ 5 mA), reverse leakage (≤3.0 µA @ VR = 1.0 V), and SOD123 package compatibility with automated PCB assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations, with a temperature coefficient of –3.5 mV/°C ensuring predictable drift over –65°C to +150°C operating range. Its planar die construction enables consistent parametric performance and high reliability under thermal cycling.
The device exhibits low forward voltage (0.9 V @ IF = 10 mA) and controlled capacitance (~10 pF at VR = 1 V, f = 1 MHz), making it suitable for DC regulation and noise-sensitive signal conditioning where minimal parasitic coupling is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V nominal, 3.7–4.1 V range @ IZT = 5 mA - defines regulated output voltage under standard test conditions |
| Zener Impedance (ZZT) | 90 Ω @ IZT = 5 mA - indicates voltage stability against current variation in regulation zone |
| Power Dissipation (PD) | 370 mW @ TA = +25°C - maximum continuous power before thermal derating begins |
| Reverse Leakage (IR) | ≤3.0 µA @ VR = 1.0 V - ensures minimal quiescent current in standby or sensing circuits |
| Thermal Resistance (RθJA) | 338 °C/W - determines junction temperature rise above ambient on standard FR-4 PCB layout |
| Operating Temperature | –65°C to +150°C - supports industrial and automotive under-hood applications without derating |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking, 0.010 g weight, UL 94V-0 flammability rating, and matte tin-plated alloy 42 leadframe for reliable solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Marked by band; supplies stable 3.9 V when reverse current ≥5 mA flows |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight parameter distribution and long-term stability under thermal stress |
| AEC-Q101 qualified | Validated for automotive electronics requiring high-reliability Zener references |
| SOD123 footprint | Enables high-density PCB layouts and compatibility with standard pick-and-place equipment |
| Halogen- and antimony-free "Green" material | Meets RoHS 2 and automotive environmental compliance without compromising thermal performance |
Applications
| Industrial Sensor Biasing | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 3.9 V bias to analog temperature/humidity sensors in factory automation nodes. IC Role / Device Role / Timing Role: Zener voltage reference and shunt regulator for sensor excitation circuitry. Use Value: Maintains sensor accuracy within ±1% over –40°C to +85°C ambient with <3.0 µA leakage at 1 V reverse bias. |
Use Scenario: Clamping transient surges on USB VBUS line to protect downstream 3.3 V LDOs and USB PHYs. IC Role / Device Role / Timing Role: Low-capacitance (10 pF) shunt protector triggered at 3.9 V breakdown threshold. Use Value: Limits overshoot to ≤4.1 V while dissipating up to 370 mW without thermal runaway on standard PCB copper. |
| Low-Power MCU Reset Circuit | LED Current Regulation Reference |
Use Scenario: Generating precise reset threshold for 3.3 V microcontrollers in battery-powered IoT edge devices. IC Role / Device Role / Timing Role: Zener-based voltage monitor feeding comparator input for power-on reset assertion. Use Value: Delivers ±5% voltage accuracy at 5 mA test current, enabling deterministic reset timing across supply voltage ramps. |
Use Scenario: Setting reference voltage for constant-current LED driver ICs in signage and indicator lighting. IC Role / Device Role / Timing Role: Stable 3.9 V reference source for current-sense amplifier feedback networks. Use Value: Minimizes LED brightness drift with <90 Ω dynamic impedance and –3.5 mV/°C tempco over full operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5227BS-7-F | Zener voltage 3.6 V (3.4–3.8 V), 200 mW PD @ TA, SOT-323 package | Lower power rating and smaller footprint; less thermal margin in sustained regulation | Select when board space is constrained and peak power <200 mW |
| 1N4728A | 3.3 V nominal, 1 W PD, DO-41 through-hole package | Higher power but incompatible with SMT assembly; requires manual rework or wave soldering | Select only for legacy through-hole designs needing higher dissipation |
Compared with MMBZ5227BS-7-F and 1N4728A, BZT52C3V9-13 offers optimal balance of SMT compatibility, 370 mW regulation capability, and ±5% voltage tolerance in the 3.9 V class-making it preferred for new industrial and automotive PCB designs requiring AEC-Q101 compliance and automated manufacturing.
Availability
BZT52C3V9-13 is available at Aetrix Electronics and suitable for industrial sensor biasing, USB port protection, low-power MCU reset circuits, and LED current regulation requiring stable component supply and AEC-Q101-qualified Zener performance.
Supply support for BZT52C3V9-13 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, specializing in high-reliability components for automotive, industrial, and computing markets.
The BZT52 series belongs to Diodes' general-purpose Zener diode product line, designed specifically for cost-effective, high-volume voltage regulation and protection in space-constrained surface-mount applications.
FAQ
What is the maximum reverse current specification for BZT52C3V9-13 at 1.0 V?
The maximum reverse current (IR) is 3.0 µA at VR = 1.0 V and TA = +25°C, per the Electrical Characteristics table in DS18004 Rev. 38-2. This low leakage ensures minimal power loss in always-on bias networks and improves accuracy in high-impedance reference circuits.
Can BZT52C3V9-13 be used in automotive applications?
Yes - BZT52C3V9-13 is AEC-Q101 qualified and offered in automotive-grade variants (e.g., BZT52C3V9Q-13-F). Its –65°C to +150°C operating range, halogen-free green packaging, and validated reliability make it suitable for engine control modules, body electronics, and infotainment power rails.
What is the thermal resistance from junction to ambient (RθJA) for this device?
RθJA is 338 °C/W when mounted on an FR-4 PCB with a 1-inch copper pad layout, as specified in Note 8 of DS18004. This value enables accurate junction temperature estimation during thermal design and confirms suitability for operation up to 125°C ambient with appropriate power derating.
How does the zener voltage change with temperature?
The temperature coefficient is –3.5 mV/°C, meaning the zener voltage decreases linearly by 3.5 mV per degree Celsius rise in junction temperature. This negative coefficient is typical for Zeners below 5 V and must be accounted for in precision reference designs operating across wide temperature ranges.
BZT52C3V9-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52C3V9-13 FAQ
1.How can I place an order for BZT52C3V9-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C3V9-13 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 BZT52C3V9-13 reliable?
The price and inventory of BZT52C3V9-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C3V9-13 is usually 5 days.
3.What payment methods are accepted for BZT52C3V9-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C3V9-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C3V9-13?
BZT52C3V9-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C3V9-13 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 BZT52C3V9-13?
For technical support, including BZT52C3V9-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C3V9-13 requirements.
6.How does Aetrix verify that BZT52C3V9-13 is sourced from the original manufacturer or authorized distributors?
All BZT52C3V9-13 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 BZT52C3V9-13 meets industry standards.
7.What is the process for return or replacement of BZT52C3V9-13?
All BZT52C3V9-13 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C3V9-13, 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 BZT52C3V9-13 part is unused and in its original packaging.
Return procedure for BZT52C3V9-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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