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Diodes Incorporated BZT52C4V7-7
- Part No.:
- BZT52C4V7-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C4V7-7.pdf
- Description:
- DIODE ZENER 4.7V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:8,193
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Product details
Overview
BZT52C4V7-7 from Diodes Incorporated is a surface-mount 4.7 V Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with 80 Ω maximum Zener impedance at 5 mA test current and ±5% voltage tolerance (4.4–5.0 V). It serves as a precision voltage reference or overvoltage clamp in low-power analog circuits, DC-DC feedback loops, and microcontroller I/O protection.
For engineers reviewing the BZT52C4V7-7 datasheet, BZT52C4V7-7 pinout, BZT52C4V7-7 application, or BZT52C4V7-7 equivalent, key selection criteria include its 4.7 V nominal Zener voltage, 3.0 µA reverse leakage at 2.0 V, -3.5 mV/°C temperature coefficient, SOD123 thermal resistance (RθJA = 338 °C/W), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage regulation across varying load currents (1.0–5.0 mA typical test range) and ambient temperatures (–65 °C to +150 °C). Its planar die construction ensures consistent Zener characteristics and low dynamic impedance.
The device exhibits a negative temperature coefficient of –3.5 mV/°C near 4.7 V, enabling predictable drift compensation in temperature-sensitive references. Its SOD123 package supports automated assembly and delivers 150 °C/W junction-to-lead thermal resistance under defined PCB layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V nominal, 4.4–5.0 V range at 5 mA - defines clamping/reference level in voltage-sensitive circuits |
| Power Dissipation | 370 mW at +25°C ambient - sets max continuous power in standard FR-4 layout with 1-inch copper pad |
| Zener Impedance (ZZT) | 80 Ω max at 1 kHz, 5 mA - determines regulation stiffness under dynamic load transients |
| Reverse Leakage (IR) | 3.0 µA max at VR = 2.0 V - limits standby current in low-power bias networks |
| Temperature Coefficient | –3.5 mV/°C - enables predictable voltage drift correction in compensated references |
| Package | SOD123 - surface-mount outline with cathode band polarity, 0.010 g weight, RoHS/Green compliant |
Pinout & Package
SOD123 package: two-terminal surface-mount device with cathode indicated by a band on the body; anode and cathode terminals are unidirectional, optimized for PCB-level voltage clamping and reference functions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-bias configuration; forms reference ground return path |
| Cathode | Zener breakdown terminal / regulated output node | Connected to higher-potential rail; maintains stable 4.7 V relative to anode during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight Zener voltage distribution and repeatable impedance across production lots |
| AEC-Q101 qualification | Validated for automotive electronics use including engine control modules and body electronics |
| Lead-free & halogen-free | Meets RoHS 2 (2011/65/EU) and Diodes Inc.'s "Green" definition (<900 ppm Br/Cl, <1000 ppm Sb) |
| Moisture sensitivity Level 1 | Enables direct placement without baking; compatible with standard reflow profiles per J-STD-020 |
Applications
| Microcontroller I/O Protection | DC-DC Converter Feedback |
|---|---|
Use Scenario: Clamping ESD transients and overvoltage spikes on GPIO lines of ARM Cortex-M or PIC microcontrollers. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between I/O pin and ground, leveraging Zener breakdown in reverse bias. Use Value: Limits pin voltage to ≤5.0 V during fast-rising events, preventing latch-up and oxide damage without adding series resistance. |
Use Scenario: Providing precise voltage reference for error amplifier input in buck converter feedback divider network. IC Role / Device Role / Timing Role: Stable 4.7 V reference node that sets output voltage via resistor ratio (e.g., 12 V output with 10 kΩ/6.2 kΩ divider). Use Value: Maintains ±2% output regulation over line/load/temperature due to low ZZT and predictable TC. |
| Low-Power Sensor Biasing | Automotive Cabin Control Interface |
Use Scenario: Generating stable bias voltage for analog-output temperature or pressure sensors in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Shunt regulator supplying clean 4.7 V to sensor supply pin while sinking up to 5 mA. Use Value: Delivers <3 µA leakage at 2 V, minimizing quiescent drain on coin-cell or Li-SOCl₂ batteries. |
Use Scenario: Overvoltage protection for touch-button inputs and LED backlight drivers in HVAC control panels. IC Role / Device Role / Timing Role: Clamp diode on 5 V rail against load-dump surges (ISO 7637-2 Pulse 5a) and alternator ripple. Use Value: AEC-Q101 qualification ensures operation at –40 °C to +125 °C and withstands 500,000 thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5225BS-7-F | Same 4.7 V nominal, but SOT-23 package (higher RθJA ≈ 400 °C/W); 100 Ω ZZT max at 20 mA | Higher thermal resistance limits power handling in compact layouts; suited for lower-current biasing only | Select when board space allows SOT-23 and thermal margin exceeds 100 °C/W requirement |
| BZX84-C4V7 | 4.7 V Zener, SOT-23, 350 mW rating, 90 Ω ZZT max at 5 mA, no AEC-Q101 qualification | Lacks automotive qualification and has higher impedance - acceptable for commercial-grade consumer products only | Choose for cost-sensitive non-automotive designs where AEC-Q101 compliance is not required |
Compared with MMBZ5225BS-7-F and BZX84-C4V7, BZT52C4V7-7 offers superior thermal performance (RθJA = 338 °C/W), lower Zener impedance (80 Ω), and AEC-Q101 validation - making it optimal for automotive and industrial applications demanding long-term stability and surge resilience.
Availability
BZT52C4V7-7 is available at Aetrix Electronics and suitable for microcontroller I/O protection, DC-DC converter feedback, and low-power sensor biasing requiring stable component supply, automotive-grade reliability, and RoHS-compliant sourcing.
Supply support for BZT52C4V7-7 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.
The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for medium-current voltage regulation and clamping in cost-sensitive, high-volume applications including automotive, industrial controls, and consumer electronics.
FAQ
What is the maximum reverse current for BZT52C4V7-7 at 2.0 V?
The maximum reverse current (IR) is 3.0 µA at VR = 2.0 V, measured at +25°C ambient. This low leakage ensures minimal power loss in battery-powered bias networks and preserves accuracy in high-impedance reference dividers.
Is BZT52C4V7-7 suitable for automotive applications?
Yes - it is qualified to AEC-Q101 standards, tested for temperature cycling, humidity, mechanical shock, and high-temperature operating life. Its SOD123 package and -65°C to +150°C operating range meet requirements for engine bay and cabin electronics.
How does the temperature coefficient affect regulation accuracy?
With a temperature coefficient of –3.5 mV/°C, the Zener voltage decreases by approximately 0.35 V over a 100°C rise. For precision applications, this drift must be compensated in system-level calibration or paired with positive-TC components in reference networks.
What is the recommended PCB pad layout for thermal performance?
Diodes Incorporated specifies a 1-inch copper pad layout on FR-4 for the SOD123 package to achieve RθJA = 338 °C/W. The recommended pad dimensions are X = 0.900 mm, X1 = 4.050 mm, and Y = 0.950 mm - available in full detail at diodes.com/package-outlines.html.
BZT52C4V7-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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
BZT52C4V7-7 FAQ
1.How can I place an order for BZT52C4V7-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C4V7-7 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 BZT52C4V7-7 reliable?
The price and inventory of BZT52C4V7-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C4V7-7 is usually 5 days.
3.What payment methods are accepted for BZT52C4V7-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C4V7-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C4V7-7?
BZT52C4V7-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C4V7-7 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 BZT52C4V7-7?
For technical support, including BZT52C4V7-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C4V7-7 requirements.
6.How does Aetrix verify that BZT52C4V7-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C4V7-7 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 BZT52C4V7-7 meets industry standards.
7.What is the process for return or replacement of BZT52C4V7-7?
All BZT52C4V7-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C4V7-7, 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 BZT52C4V7-7 part is unused and in its original packaging.
Return procedure for BZT52C4V7-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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