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Diodes Incorporated BZT52C4V3-7
- Part No.:
- BZT52C4V3-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C4V3-7.pdf
- Description:
- DIODE ZENER 4.3V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,017
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Product details
Overview
BZT52C4V3-7 from Diodes Incorporated is a surface-mount silicon Zener diode with a nominal zener voltage of 4.3 V, ±5% tolerance (4.0–4.6 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.
For engineers reviewing the BZT52C4V3-7 datasheet, BZT52C4V3-7 pinout, BZT52C4V3-7 application, or BZT52C4V3-7 equivalent, key selection criteria include zener voltage accuracy at 5 mA test current, low dynamic impedance (90 Ω at IZT), reverse leakage (≤3.0 µA at VR = 1.0 V), thermal resistance (RθJA = 338 °C/W), and SOD123 package compatibility with automated PCB assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load or supply conditions. Its planar die construction ensures consistent voltage regulation and long-term stability across temperature ranges from –65 °C to +150 °C.
Designed for medium-current general-purpose regulation, it delivers predictable performance at IZT = 5 mA with a temperature coefficient of –3.5 mV/°C and maximum zener impedance of 90 Ω at 1 kHz - critical for noise-sensitive analog references and feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V nominal, 4.0–4.6 V range at 5 mA - defines precise clamping threshold for 3.3 V/5 V rail monitoring |
| Power Dissipation (PD) | 370 mW at TA = +25°C - sets maximum continuous power handling on standard FR-4 PCB |
| Zener Impedance (ZZT) | 90 Ω at 1 kHz, 5 mA - determines output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | ≤3.0 µA at VR = 1.0 V - ensures minimal quiescent current in battery-powered sensing nodes |
| Thermal Resistance (RθJA) | 338 °C/W - quantifies junction-to-ambient self-heating under sustained conduction |
| Operating Temperature | –65 °C to +150 °C - supports industrial and automotive under-hood environments |
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 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; delivers stable 4.3 V reference when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight VZ tolerance control and improved long-term parametric stability vs. diffused junctions |
| 500 mW power rating at TL = +75°C | Supports higher ambient operation in thermally constrained enclosures without derating to zero at 75°C |
| AEC-Q101 qualified (automotive-grade variants) | Validates reliability for automotive body electronics where BZT52C4V3-7Q-7-F is used |
| SOD123 footprint compatibility | Matches JEDEC standard layout for seamless integration into high-volume SMT lines with 0.9 mm pad spacing |
Applications
| Power Supply Monitoring | ADC Reference Clamp |
|---|---|
|
Use Scenario: Monitoring 5 V system rail for brown-out detection in microcontroller-based power management. IC Role / Device Role: Zener diode provides fixed 4.3 V threshold to comparator input, triggering reset when rail drops below regulation point. Use Value: Tight 4.0–4.6 V tolerance ensures accurate trip point; low IR minimizes loading on monitored rail. |
Use Scenario: Clamping ADC reference input to prevent overvoltage damage during transient coupling. IC Role / Device Role: Acts as shunt limiter between reference pin and ground, absorbing ESD or surge energy before IC input stage. Use Value: 90 Ω dynamic impedance limits clamp voltage overshoot; SOD123 size fits near IC pin without routing congestion. |
| Low-Power Sensor Biasing | USB Port Overvoltage Protection |
|
Use Scenario: Providing stable bias voltage to analog sensor front-end in battery-operated IoT nodes. IC Role / Device Role: Supplies regulated 4.3 V to op-amp gain stage, reducing sensitivity to battery discharge curve. Use Value: ≤3.0 µA reverse leakage extends battery life; –3.5 mV/°C TC enables predictable drift compensation. |
Use Scenario: Protecting USB data lines from accidental 12 V misconnection in docking stations. IC Role / Device Role: Shunts excess voltage to ground when line exceeds 4.6 V, preventing transceiver latch-up. Use Value: 500 mW peak power rating handles short-duration surges; cathode-band polarity ensures correct orientation in D+/D– layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5229BS-7-F | Zener voltage 4.3 V, but rated at 200 mW (SOT-23); higher RθJA (~450 °C/W) | Limited to lower-power signal-level clamping; unsuitable for >10 mA regulation loads | Select when board space is constrained and power <150 mW; verify thermal margin in dense layouts |
| BZX84-C4V3-7 | Same 4.3 V rating, but SOT-23 package and 350 mW PD at TA = +25°C; higher ZZT (100 Ω) | Marginally higher impedance affects regulation accuracy in precision feedback loops | Prefer for legacy SOT-23 designs; avoid where <90 Ω impedance is required for fast transient response |
Compared with MMBZ5229BS-7-F and BZX84-C4V3-7, BZT52C4V3-7 offers superior power handling (370 mW) and lower dynamic impedance (90 Ω) in the industry-standard SOD123 footprint - making it optimal for robust, medium-current voltage reference and protection tasks.
Availability
BZT52C4V3-7 is available at Aetrix Electronics and suitable for power supply monitoring, ADC reference clamping, low-power sensor biasing, and USB port overvoltage protection requiring stable component supply and RoHS-compliant sourcing.
Supply support for BZT52C4V3-7 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, specializing in high-reliability components for industrial, computing, consumer, and automotive markets.
The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-yield voltage regulation and protection in automated SMT manufacturing environments.
FAQ
What is the maximum reverse voltage (VR) at which leakage current is specified for BZT52C4V3-7?
The datasheet specifies IR ≤ 3.0 µA at VR = 1.0 V, measured under standard conditions (TA = +25°C). This value reflects the diode's ability to hold off low-voltage transients while maintaining ultra-low standby current - essential for battery-backed systems and precision reference circuits.
Can BZT52C4V3-7 be used in place of a 3.3 V Zener diode?
No - BZT52C4V3-7 has a nominal zener voltage of 4.3 V (range 4.0–4.6 V), not 3.3 V. For 3.3 V regulation, BZT52C3V3-7 (3.3 V, 3.1–3.5 V range) is the correct variant in the same series and package, with matching electrical characteristics and thermal performance.
Is the SOD123 package of BZT52C4V3-7 compatible with reflow soldering per J-STD-020?
Yes - the device is qualified for moisture sensitivity level 1 (MSL-1), meaning it can be stored indefinitely at ≤30°C/85% RH and withstand standard Pb-free reflow profiles without baking. Its matte tin finish and Alloy 42 leadframe ensure reliable wetting and joint integrity per MIL-STD-202, Method 208.
Does BZT52C4V3-7 meet automotive qualification standards?
The base part BZT52C4V3-7 is commercial-grade; however, the automotive-qualified version BZT52C4V3Q-7-F is AEC-Q101 certified and shares identical electrical specs. For automotive applications, only the "Q" suffix variant should be selected to guarantee stress-test compliance and extended temperature validation.
BZT52C4V3-7 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):
- 4.3 V
- Tolerance:
- ±7%
- 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
BZT52C4V3-7 FAQ
1.How can I place an order for BZT52C4V3-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C4V3-7 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 BZT52C4V3-7 reliable?
The price and inventory of BZT52C4V3-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C4V3-7 is usually 5 days.
3.What payment methods are accepted for BZT52C4V3-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C4V3-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C4V3-7?
BZT52C4V3-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C4V3-7 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 BZT52C4V3-7?
For technical support, including BZT52C4V3-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C4V3-7 requirements.
6.How does Aetrix verify that BZT52C4V3-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C4V3-7 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 BZT52C4V3-7 meets industry standards.
7.What is the process for return or replacement of BZT52C4V3-7?
All BZT52C4V3-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C4V3-7, 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 BZT52C4V3-7 part is unused and in its original packaging.
Return procedure for BZT52C4V3-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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