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Diodes Incorporated BZT52C4V3S-7-F
- Part No.:
- BZT52C4V3S-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZT52C4V3S-7-F.pdf
- Description:
- DIODE ZENER 4.3V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:27,792
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Product details
Overview
BZT52C4V3S-7-F from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 4.3 V, ±5% tolerance (4.0–4.6 V), 200 mW power dissipation, and 90 Ω dynamic impedance at 5 mA test current. It operates in reverse-bias regulation mode for voltage reference and overvoltage protection in low-power analog circuits, such as sensor biasing and microcontroller I/O clamping.
For engineers reviewing the BZT52C4V3S-7-F datasheet, BZT52C4V3S-7-F pinout, BZT52C4V3S-7-F application, or BZT52C4V3S-7-F equivalent, key selection criteria include zener voltage accuracy, thermal resistance (625 °C/W), SOD323 package compatibility, low leakage (≤3 µA at 1.0 V), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode uses planar die construction to ensure stable breakdown characteristics and tight voltage tolerance across temperature. Its cathode-band polarity and matte tin-plated alloy 42 leadframe support automated SMT assembly and solderability per MIL-STD-202.
The device regulates voltage by maintaining a near-constant reverse-bias voltage drop across its terminals when current exceeds the knee threshold (~1 mA). Thermal derating begins above +25°C ambient, with full 200 mW dissipation only at ≤+70°C per the power derating curve.
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/reference level for 3.3 V/5 V rail monitoring |
| Power Dissipation (PD) | 200 mW - limits continuous regulation current to ~46 mA at 4.3 V without heatsinking |
| Zener Impedance (ZZT) | 90 Ω at 5 mA - indicates moderate AC regulation stability under small-signal ripple |
| Reverse Leakage (IR) | ≤3 µA at 1.0 V - ensures minimal quiescent current draw in battery-powered voltage monitor circuits |
| Thermal Resistance (RθJA) | 625 °C/W - requires careful PCB copper area design to avoid junction overheating above +70°C ambient |
| Operating Temperature | −65 to +150 °C - supports extended-range industrial and automotive under-hood applications |
| Package | SOD323 - 1.3 mm × 1.7 mm footprint compatible with high-density PCB layouts and reflow profiles |
Pinout & Package
Package: SOD323 - surface-mount plastic case with cathode band marking; dimensions: 1.30 mm (D) × 1.70 mm (E) × 0.30 mm (L); weight ≈ 0.0049 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side (e.g., GND or signal return) during reverse-bias regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated node (e.g., MCU VREF, sensor supply); marked with band on package top view |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use with proven reliability under temperature cycling and humidity testing |
| Lead-free & RoHS compliant | Fully compliant with EU Directive 2011/65/EU; no intentionally added lead, halogens, or antimony |
| Moisture Sensitivity Level 1 | Unlimited floor life at ≤30°C/60% RH - eliminates baking requirement before SMT assembly |
| Planar die construction | Enables tight VZ tolerance control and repeatable breakdown characteristics across production lots |
Applications
| Automotive Sensor Biasing | Microcontroller I/O Protection |
|---|---|
Use Scenario: Providing stable 4.3 V bias to analog output sensors (e.g., pressure or temperature transducers) in engine control units. IC Role / Device Role / Timing Role: Precision voltage reference source ensuring ADC input scaling remains consistent across temperature and supply variation. Use Value: Maintains sensor output linearity within ±0.5% error over −40°C to +125°C due to low tempco (−3.5 to 0 mV/°C) and AEC-Q101 robustness. | Use Scenario: Clamping ESD transients on 3.3 V GPIO lines of automotive body control modules. IC Role / Device Role / Timing Role: Low-capacitance (≈30 pF) shunt protector diverting >8 kV HBM surges away from sensitive CMOS inputs. Use Value: Limits voltage excursion to ≤5.0 V during fast transients while drawing <1 µA standby current-preserving signal integrity and power budget. |
| Industrial Power Supply Monitoring | Portable Medical Device Reference |
Use Scenario: Monitoring 5 V rail health in programmable logic controllers using comparator-based undervoltage detection. IC Role / Device Role / Timing Role: Stable zener reference enabling accurate trip-point setting at 4.3 V ±2%, independent of load current fluctuations. Use Value: Delivers <±1% effective reference accuracy after accounting for 90 Ω ZZT and 5 mA test condition-critical for fail-safe shutdown decisions. | Use Scenario: Generating a low-drift reference for analog front-end amplifiers in handheld ECG monitors. IC Role / Device Role / Timing Role: Low-noise, low-leakage voltage reference replacing larger TO-92 parts in space-constrained wearable PCBs. Use Value: Enables 16-bit ADC performance with <5 µV RMS noise contribution and zero calibration drift over 24-hour operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5229BS-7-F | Zener voltage 4.3 V, same SOD323 package, but 350 mW PD and higher ZZT (120 Ω) | Higher power handling suits transient-heavy environments but sacrifices regulation precision | Select when surge energy absorption >200 mW is required; verify thermal layout supports higher dissipation |
| BZX384-B4V3,115 | Same 4.3 V rating and SOD323 package, but 300 mW PD, 100 Ω ZZT, and non-AEC-Q101 qualification | Lacks automotive qualification; suitable for commercial-grade consumer electronics only | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with MMBZ5229BS-7-F and BZX384-B4V3,115, BZT52C4V3S-7-F offers optimal balance of automotive qualification, tight 5% VZ tolerance, and low ZZT-making it preferred for precision reference and safety-critical clamping where long-term stability matters.
Availability
BZT52C4V3S-7-F is available at Aetrix Electronics and suitable for automotive sensor biasing, microcontroller I/O protection, and industrial power supply monitoring requiring stable component supply, AEC-Q101 compliance, and SOD323 footprint consistency.
Supply support for BZT52C4V3S-7-F 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 ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
The BZT52C series belongs to Diodes' standard Zener diode product line, engineered for precision voltage regulation and ESD protection in space-constrained, high-volume SMT applications-particularly where automotive qualification and green material compliance are mandatory.
FAQ
What is the maximum reverse current at 1.0 V for BZT52C4V3S-7-F?
The maximum reverse current (IR) is 3 µA at VR = 1.0 V, measured at +25°C ambient. This low leakage enables use in battery-backed systems where standby current must remain below 10 µA across temperature and aging.
Is BZT52C4V3S-7-F suitable for reflow soldering per J-STD-020?
Yes-it is rated Moisture Sensitivity Level 1 and qualified for standard Pb-free reflow profiles (peak 260°C). The matte tin finish on alloy 42 leadframe ensures reliable wetting and joint strength without voiding or dewetting.
Does this Zener diode have a specified temperature coefficient?
Yes-the temperature coefficient of VZ is −3.5 to 0 mV/°C, meaning its breakdown voltage decreases slightly with rising temperature. This allows predictable compensation in temperature-stable reference designs when paired with positive-tempco components.
Can BZT52C4V3S-7-F replace older through-hole Zeners like 1N4733A?
No-it is not a direct replacement due to different package (SOD323 vs. DO-41), power rating (200 mW vs. 1 W), and thermal behavior. While both regulate at ~4.3 V, PCB layout, thermal management, and surge handling differ significantly; redesign validation is required.
BZT52C4V3S-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±7%
- Power - Max:
- 200 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-323
BZT52C4V3S-7-F FAQ
1.How can I place an order for BZT52C4V3S-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C4V3S-7-F 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 BZT52C4V3S-7-F reliable?
The price and inventory of BZT52C4V3S-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C4V3S-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C4V3S-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C4V3S-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C4V3S-7-F?
BZT52C4V3S-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C4V3S-7-F 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 BZT52C4V3S-7-F?
For technical support, including BZT52C4V3S-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C4V3S-7-F requirements.
6.How does Aetrix verify that BZT52C4V3S-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C4V3S-7-F 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 BZT52C4V3S-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C4V3S-7-F?
All BZT52C4V3S-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C4V3S-7-F, 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 BZT52C4V3S-7-F part is unused and in its original packaging.
Return procedure for BZT52C4V3S-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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