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Diodes Incorporated BZT52C4V3SQ-7-F
- Part No.:
- BZT52C4V3SQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZT52C4V3SQ-7-F.pdf
- Description:
- DIODE ZENER 4.3V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,390
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Product details
Overview
BZT52C4V3SQ-7-F from Diodes Incorporated is a surface-mount Zener diode with nominal 4.3 V zener voltage (±0.3 V tolerance), 200 mW power dissipation, and 90 Ω maximum zener impedance at 5 mA test current, designed for precision voltage regulation and overvoltage protection in compact DC power rails.
For engineers reviewing the BZT52C4V3SQ-7-F datasheet, BZT52C4V3SQ-7-F pinout, BZT52C4V3SQ-7-F application, or BZT52C4V3SQ-7-F equivalent, key selection criteria include zener voltage accuracy at 5 mA, low leakage (<3 µA @ 1.0 V), thermal resistance (625 °C/W), automotive qualification (AEC-Q101), and SOD323 package compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent voltage regulation, while the cathode-band polarity marking enables unambiguous orientation during automated placement.
The device is rated for operation from −65 °C to +150 °C and exhibits a temperature coefficient of −3.5 mV/°C near 4.3 V, enabling predictable drift compensation in bias networks and feedback loops where thermal stability is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V nominal, 4.0–4.6 V range at IZT = 5 mA - defines regulation setpoint for low-voltage reference circuits |
| Power Dissipation (PD) | 200 mW - limits continuous current to ~46 mA at 4.3 V without heatsinking |
| Zener Impedance (ZZT) | 90 Ω max at 1 kHz, 5 mA - determines output voltage ripple rejection in shunt regulator topologies |
| Reverse Leakage (IR) | 3 µA max at VR = 1.0 V - ensures minimal quiescent current in battery-powered sensing nodes |
| Thermal Resistance (RθJA) | 625 °C/W - requires careful PCB copper area design to avoid junction overheating above ambient |
| Operating Temperature | −65 °C to +150 °C - supports under-hood automotive and industrial control environments |
Pinout & Package
Package: SOD323 - ultra-compact 2-pin surface-mount plastic case (1.30 mm × 1.70 mm × 0.90 mm), matte tin-plated alloy 42 leadframe, cathode band marking, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to lower-potential side of regulated rail; forms return path for zener current |
| Cathode | Reverse-biased breakdown terminal / Zener output node | Connected to higher-potential side; delivers stable 4.3 V reference when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including HTOL, TCT, and ESD HBM ≥2 kV |
| Lead-free & RoHS compliant | Fully compliant with EU Directive 2011/65/EU; no intentionally added lead, halogen, or antimony |
| SOD323 footprint | Enables high-density routing on space-constrained PCBs; compatible with standard pick-and-place equipment |
| Low zener impedance | 90 Ω max ensures <10 mV output variation across 1–10 mA load changes in shunt regulator use |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for LIN transceiver biasing and microcontroller ADC reference in door module ECUs. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.3 V supply to analog front-end circuitry. Use Value: Maintains ±1% ADC accuracy over −40 °C to +125 °C ambient due to AEC-Q101 thermal robustness and low TC. | Use Scenario: Clamping and regulating 5 V supply rail feeding MEMS pressure sensor signal chain. IC Role / Device Role / Timing Role: Overvoltage protector and precision voltage clamp limiting rail excursion to 4.6 V max. Use Value: Prevents sensor IC damage during load-dump transients while adding <0.5 µA standby leakage. |
| USB-C Power Delivery Monitor | Medical Wearable Battery Management |
Use Scenario: Providing reference voltage for voltage-monitoring comparators in USB PD sink controller ICs. IC Role / Device Role / Timing Role: Stable 4.3 V threshold generator for VBUS presence detection and fault flag assertion. Use Value: Enables accurate 5 V ±5% VBUS validation with <0.1 V hysteresis shift across temperature. | Use Scenario: Biasing low-power op-amps in ECG front-end amplifiers powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-leakage voltage reference establishing common-mode input level for instrumentation amplifier. Use Value: Delivers <3 µA reverse current at 1 V, extending battery life beyond 72 hours in continuous monitoring mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4V3T1G | Same 4.3 V nominal, but 350 mW PD, 500 Ω ZZT, SOD123 package (larger footprint) | Higher power handling but less precise regulation; suitable where board space allows larger package | Select when >200 mW dissipation is required and tighter impedance is not critical |
| BZX384-C4V3 | 4.3 V nominal, 300 mW PD, 90 Ω ZZT, SOD323 package, but not AEC-Q101 qualified | Lacks automotive qualification; limited to commercial-temperature industrial use | Choose for cost-sensitive non-automotive designs requiring identical electrical performance |
Compared with MMSZ4V3T1G and BZX384-C4V3, BZT52C4V3SQ-7-F uniquely combines AEC-Q101 qualification, SOD323 size, and tight 90 Ω impedance-making it optimal for space-constrained automotive voltage references where reliability and regulation precision are jointly critical.
Availability
BZT52C4V3SQ-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, USB-C power monitors, and medical wearable battery management systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52C4V3SQ-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 analog ICs, specializing in high-reliability components for automotive, industrial, and consumer markets since 1960.
The BZT52C series belongs to Diodes' automotive-grade Zener diode product line, engineered specifically for precision voltage reference and overvoltage clamping in harsh-environment electronic control units.
FAQ
What is the maximum reverse current specification for BZT52C4V3SQ-7-F at 1.0 V?
The maximum reverse current (IR) is 3 µA at VR = 1.0 V and TA = +25 °C, as specified in the Electrical Characteristics table. This low leakage supports energy-efficient operation in always-on sensor biasing and battery-backed circuits where standby current must remain below 10 µA.
Is BZT52C4V3SQ-7-F suitable for use in a 125 °C ambient environment?
Yes - its operating temperature range extends to +150 °C, and it is qualified to AEC-Q101 standards, which include high-temperature operating life testing at 150 °C. Derating curves confirm usable power dissipation down to ~120 mW at 125 °C ambient when mounted on FR-4 with recommended pad layout.
How does the −3.5 mV/°C temperature coefficient affect regulation accuracy?
The negative temperature coefficient means VZ decreases by 3.5 mV per °C rise. Over a 100 °C span (−40 °C to +60 °C), this causes ~350 mV total drift - a 8.1% shift from 4.3 V. For high-accuracy references, this must be compensated via circuit topology (e.g., complementary diode pairs) or calibrated out in digital systems.
Can BZT52C4V3SQ-7-F replace a 4.7 V Zener in an existing design?
No - its nominal 4.3 V rating differs from 4.7 V by 0.4 V (9.3%), exceeding typical tolerance bands for most regulation or clamping functions. Substituting would cause incorrect bias points, comparator thresholds, or overvoltage trip levels unless the circuit explicitly accommodates ±0.5 V variation.
BZT52C4V3SQ-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:
- ±6.98%
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZT52C4V3SQ-7-F FAQ
1.How can I place an order for BZT52C4V3SQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C4V3SQ-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 BZT52C4V3SQ-7-F reliable?
The price and inventory of BZT52C4V3SQ-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 BZT52C4V3SQ-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C4V3SQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C4V3SQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C4V3SQ-7-F?
BZT52C4V3SQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C4V3SQ-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 BZT52C4V3SQ-7-F?
For technical support, including BZT52C4V3SQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C4V3SQ-7-F requirements.
6.How does Aetrix verify that BZT52C4V3SQ-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C4V3SQ-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 BZT52C4V3SQ-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C4V3SQ-7-F?
All BZT52C4V3SQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C4V3SQ-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 BZT52C4V3SQ-7-F part is unused and in its original packaging.
Return procedure for BZT52C4V3SQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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