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Diodes Incorporated BZT52C3V9S-7-F
- Part No.:
- BZT52C3V9S-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZT52C3V9S-7-F.pdf
- Description:
- DIODE ZENER 3.9V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:90,664
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Product details
Overview
BZT52C3V9S-7-F from Diodes Incorporated is a surface-mount Zener diode with nominal 3.9 V zener voltage at 5 mA test current, 90 Ω maximum zener impedance at 5 mA, and 3 µA maximum reverse leakage current at 1.0 V reverse bias. It operates within -65°C to +150°C, dissipates up to 200 mW, and is housed in an SOD323 package-used for precision voltage reference and overvoltage protection in low-power analog sensor interfaces.
For engineers reviewing the BZT52C3V9S-7-F datasheet, BZT52C3V9S-7-F pinout, BZT52C3V9S-7-F application, or BZT52C3V9S-7-F equivalent, key selection criteria include its tight 3.7–4.1 V zener tolerance, AEC-Q101 qualification for automotive use, RoHS-compliant lead-free construction, and thermal resistance of 625 °C/W on FR-4 PCBs.
Technical Context
This Zener diode employs planar die construction for stable breakdown characteristics and low noise performance. Its cathode-band polarity and matte tin-plated alloy 42 leadframe ensure reliable solderability per MIL-STD-202 and compatibility with automated SMT assembly.
The device exhibits a temperature coefficient of -3.5 mV/°C (typical), enabling predictable voltage drift compensation in temperature-sensitive references. Its 0.0049 g mass and SOD323 footprint support high-density PCB layouts in space-constrained consumer and automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V nominal at 5 mA; range 3.7–4.1 V ensures ±5.1% regulation accuracy in feedback loops |
| Power Dissipation (PD) | 200 mW max; limits continuous current to ~51 mA at 3.9 V in ambient conditions |
| Zener Impedance (ZZT) | 90 Ω max at 5 mA; maintains stable regulation under dynamic load transients |
| Reverse Leakage (IR) | 3 µA max at 1.0 V; minimizes quiescent current loss in battery-powered voltage monitors |
| Thermal Resistance (RθJA) | 625 °C/W on FR-4; requires derating above 25°C ambient to sustain full power |
| Operating Temperature | -65°C to +150°C; supports under-hood automotive and industrial control environments |
| Package | SOD323; 1.3 mm × 1.7 mm footprint with 0.3 mm lead pitch enables 0402-equivalent board area usage |
Pinout & Package
Package: SOD323 - surface-mount plastic case with cathode band marking, moisture sensitivity level 1, and UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener operation; forms current path during clamping |
| Cathode | Zener breakdown terminal | Marked by band; connected to higher-potential node to enable controlled avalanche conduction at 3.9 V |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Delivers repeatable breakdown voltage and low parameter drift across production lots |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling and HTRB stress testing |
| Lead-free & halogen-free | Meets EU RoHS 2 (2011/65/EU) and green compound requirements (<900 ppm Br/Cl, <1000 ppm Sb) |
| Small SOD323 footprint | Reduces PCB real estate by >30% vs. SOD123 while maintaining thermal performance via optimized pad layout |
Applications
| Automotive Cabin Sensors | Industrial Analog Front-Ends |
|---|---|
Use Scenario: Voltage reference for MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Provides stable 3.9 V bias to ADC reference inputs and op-amp rails. Use Value: Tight 3.7–4.1 V tolerance ensures <0.5% measurement error across -40°C to +125°C operating range. | Use Scenario: Overvoltage clamp protecting 3.3 V I/O pins of microcontrollers in PLC input modules. IC Role / Device Role / Timing Role: Shunts transient surges above 3.9 V to ground before damage occurs. Use Value: 90 Ω zener impedance limits clamping voltage overshoot to <4.5 V during 100 ns ESD events. |
| Portable Medical Monitors | Smart Home Energy Meters |
Use Scenario: Precision voltage reference for lithium-ion battery fuel gauging ICs in wearable pulse oximeters. IC Role / Device Role / Timing Role: Supplies regulated excitation voltage to analog sensor signal chains. Use Value: 3 µA reverse leakage at 1 V preserves battery life beyond 2 years in always-on monitoring mode. | Use Scenario: Secondary voltage clamp on isolated RS-485 transceiver power rails in smart meter communication modules. IC Role / Device Role / Timing Role: Absorbs coupling-induced spikes on 3.3 V auxiliary supplies. Use Value: AEC-Q101 qualification ensures long-term stability in field-deployed utility infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5227BS-7-F | Same SOD323 package; 3.6 V nominal zener voltage (3.4–3.8 V range); 90 Ω ZZT; 5 µA IR at 1 V | Lower regulation point suits 3.3 V rail monitoring where tighter margin below 3.6 V is required | Select when system tolerances demand 3.6 V clamping with identical thermal and footprint constraints |
| BZX384-C3V9,115 | SOD323 package; 3.9 V nominal (3.7–4.1 V); 90 Ω ZZT; 3 µA IR at 1 V; no 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 MMBZ5227BS-7-F and BZX384-C3V9,115, BZT52C3V9S-7-F uniquely combines automotive qualification, 3.9 V regulation, and sub-5 µA leakage-making it optimal for safety-critical voltage supervision where reliability and specification alignment are jointly essential.
Availability
BZT52C3V9S-7-F is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial analog front-ends, and portable medical monitors requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZT52C3V9S-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The BZT52C series belongs to Diodes' standard Zener diode portfolio, engineered specifically for high-reliability voltage regulation and transient suppression in automotive, industrial, and portable electronics where small size and consistent parametric performance are critical.
FAQ
What is the maximum power dissipation for BZT52C3V9S-7-F at 85°C ambient?
At 85°C ambient, the device's power dissipation must be derated linearly from 200 mW at 25°C using its 625 °C/W thermal resistance. The allowable power is 200 mW × (1 − (85 − 25)/625) = 180.8 mW. This ensures junction temperature remains below 150°C under steady-state operation.
Is BZT52C3V9S-7-F suitable for bidirectional ESD protection?
No. BZT52C3V9S-7-F is a unidirectional Zener diode with cathode-band polarity and designed for reverse-bias regulation only. It lacks symmetric breakdown characteristics and specified ESD ratings (e.g., IEC 61000-4-2), making it unsuitable as a standalone bidirectional TVS device.
How does the -7-F suffix affect packaging and compliance?
The "-7-F" suffix denotes tape-and-reel packaging: 3,000 units per reel, with lead-free, RoHS-compliant plating and halogen-free molding compound. It confirms compliance with J-STD-020 moisture sensitivity level 1 and qualifies the part for automated SMT placement without baking.
Can BZT52C3V9S-7-F replace BZT52C3V6S-7-F in a 3.6 V reference circuit?
No-BZT52C3V9S-7-F has a nominal 3.9 V zener voltage (3.7–4.1 V range), exceeding the 3.6 V (3.4–3.8 V) range of BZT52C3V6S-7-F. Substituting it would raise reference voltage by ~0.3 V, potentially violating ADC input range or comparator thresholds in precision circuits.
BZT52C3V9S-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):
- 3.9 V
- Tolerance:
- ±5%
- 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
BZT52C3V9S-7-F FAQ
1.How can I place an order for BZT52C3V9S-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C3V9S-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 BZT52C3V9S-7-F reliable?
The price and inventory of BZT52C3V9S-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 BZT52C3V9S-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C3V9S-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C3V9S-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C3V9S-7-F?
BZT52C3V9S-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C3V9S-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 BZT52C3V9S-7-F?
For technical support, including BZT52C3V9S-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C3V9S-7-F requirements.
6.How does Aetrix verify that BZT52C3V9S-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C3V9S-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 BZT52C3V9S-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C3V9S-7-F?
All BZT52C3V9S-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C3V9S-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 BZT52C3V9S-7-F part is unused and in its original packaging.
Return procedure for BZT52C3V9S-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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