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Diodes Incorporated BZT52C20SQ-7-F
- Part No.:
- BZT52C20SQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZT52C20SQ-7-F.pdf
- Description:
- DIODE ZENER 20V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:1,850
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Product details
Overview
BZT52C20SQ-7-F from Diodes Incorporated is a surface-mount Zener diode with nominal 20 V zener voltage (18.8–21.2 V range at 5 mA), 200 mW power dissipation, and SOD323 package. It provides precise voltage regulation in low-power biasing, reference, and overvoltage protection circuits for automotive and industrial control modules.
For engineers reviewing the BZT52C20SQ-7-F datasheet, BZT52C20SQ-7-F pinout, BZT52C20SQ-7-F application, or BZT52C20SQ-7-F equivalent, key selection criteria include zener voltage tolerance (±5.5%), low leakage current (0.1 µA @ 14.4 V), temperature coefficient (+14.0 mV/°C), and AEC-Q101 qualification for automotive reliability.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load or supply conditions. Its planar die construction ensures consistent breakdown characteristics, while the SOD323 package supports high-density PCB layouts and automated assembly.
The device exhibits a typical zener impedance of 55 Ω at 5 mA test current and 225 Ω at knee current (1.0 mA), enabling effective regulation in both active and near-threshold operation. Its thermal resistance (625 °C/W) and operating range (−65 to +150 °C) support use in thermally constrained environments without derating below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal, 18.8–21.2 V range at 5 mA - defines regulation setpoint with ±5.5% tolerance |
| Power Dissipation (PD) | 200 mW - limits continuous power handling on standard FR-4 PCB with recommended pad layout |
| Zener Impedance (ZZT) | 55 Ω at 5 mA - determines regulation stiffness under dynamic load changes |
| Reverse Leakage (IR) | 0.1 µA max @ 14.4 V - ensures minimal quiescent current in standby bias networks |
| Temperature Coefficient | +14.0 mV/°C - quantifies voltage drift per degree Celsius above 25 °C ambient |
| Package | SOD323 - 1.3 × 1.7 mm footprint with cathode band polarity marking |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SOD323 - ultra-small plastic surface-mount case (1.30 mm × 1.70 mm × 0.95 mm), matte tin-plated alloy 42 leadframe, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node in reverse-biased regulation configuration |
| Cathode | Zener breakdown terminal / voltage reference output | Provides stable 20 V reference when biased above breakdown with current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight VZ distribution and repeatable breakdown behavior across production lots |
| AEC-Q101 qualification | Validates suitability for automotive powertrain and body electronics without additional qualification effort |
| Lead-free & halogen-free | Meets RoHS 2 and JEDEC J-STD-020 Level 1 moisture sensitivity for reflow compatibility |
| Low weight (0.0049 g) | Minimizes mechanical stress on fine-pitch PCB traces during thermal cycling |
Applications
| Automotive ECU Power Monitoring | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Monitoring 24 V supply rail in engine control unit to detect undervoltage or overvoltage faults. IC Role / Device Role / Timing Role: Zener clamping element in comparator input divider network. Use Value: Provides stable 20 V reference point unaffected by supply ripple, enabling accurate threshold detection within ±1%. | Use Scenario: Supplying precision bias current to MEMS pressure sensor front-end amplifier. IC Role / Device Role / Timing Role: Voltage reference shunt regulator in low-noise analog signal chain. Use Value: Delivers <0.1 µA leakage and +14 mV/°C TC, minimizing offset drift across −40 to +125 °C operating range. |
| USB-C Port Overvoltage Protection | Smart Meter Voltage Supervisor |
Use Scenario: Clamping transient surges on VBUS line during hot-plug events in USB-C PD implementations. IC Role / Device Role / Timing Role: Fast-response shunt protector placed after TVS but before PMIC input. Use Value: Activates at 20 V with 55 Ω dynamic impedance, limiting clamp voltage to ≤21.5 V at 100 mA surge. | Use Scenario: Supervising main AC-DC converter output in utility smart meter to trigger brownout reset. IC Role / Device Role / Timing Role: Precision reference for microcontroller ADC-based voltage monitoring. Use Value: Enables 0.5% measurement accuracy over 10-year field life due to AEC-Q101 stress validation and low parametric drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5242B-TP (Micro Commercial) | Same 20 V nominal, but ±5% tolerance (19.0–21.0 V); 500 mW rating; SOD-123 package | Larger footprint (2.7 × 1.4 mm) and higher power allow higher surge handling, but less suitable for space-constrained automotive modules | Select when board space permits and higher PD margin is required; not drop-in compatible due to package mismatch |
| BZX384-C20 (Nexperia) | 20 V nominal, ±5% tolerance; 300 mW rating; SOD-323 package; −2 mV/°C TC (vs. +14 mV/°C) | Negatively compensated TC enables improved stability in rising-temperature environments like under-hood sensors | Prefer where ambient temperature rise dominates regulation error budget; identical footprint enables direct replacement |
Compared with MMSZ5242B-TP and BZX384-C20, BZT52C20SQ-7-F offers tighter automotive qualification (AEC-Q101 vs. AEC-Q200), smaller SOD323 footprint, and positive TC optimized for fixed-reference designs-making it preferred for space-limited, high-reliability automotive applications despite its narrower voltage tolerance.
Availability
BZT52C20SQ-7-F is available at Aetrix Electronics and suitable for automotive ECU power monitoring, industrial sensor bias reference, and USB-C port overvoltage protection requiring stable component supply and AEC-Q101 compliance.
Supply support for BZT52C20SQ-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' automotive-qualified Zener portfolio, designed specifically for voltage regulation and reference functions in harsh-environment applications where reliability, small size, and consistent parametric performance are critical.
FAQ
What is the maximum reverse current specification for BZT52C20SQ-7-F at 14.4 V?
The maximum reverse leakage current is 0.1 µA at VR = 14.4 V and TA = 25 °C, as specified in the Electrical Characteristics table. This value remains valid up to TJ = 150 °C per thermal derating curves, supporting low-power bias networks in always-on automotive modules.
Is BZT52C20SQ-7-F suitable for use in reflow soldering processes?
Yes - it is qualified to J-STD-020 Moisture Sensitivity Level 1 and features matte tin plating compatible with standard Pb-free reflow profiles (peak 260 °C). The SOD323 package's low mass (0.0049 g) minimizes thermal stress during ramp-up and cooling phases.
How does the +14.0 mV/°C temperature coefficient affect circuit design?
This positive coefficient means VZ increases by ~14 mV per °C rise above 25 °C ambient. Designers must account for this drift in precision references - e.g., a 75 °C junction temperature yields +0.7 V shift, requiring compensation in high-accuracy ADC references or trimming in calibration routines.
Does BZT52C20SQ-7-F have a defined zener knee current?
Yes - the knee current (IZK) is 1.0 mA, with corresponding Zener impedance (ZZK) of 225 Ω. At this point, the diode begins transitioning into full breakdown, enabling usable regulation down to ~19.5 V, which supports low-current biasing in sleep-mode circuits.
BZT52C20SQ-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):
- 20 V
- Tolerance:
- ±6%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 14 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZT52C20SQ-7-F FAQ
1.How can I place an order for BZT52C20SQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C20SQ-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 BZT52C20SQ-7-F reliable?
The price and inventory of BZT52C20SQ-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 BZT52C20SQ-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C20SQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C20SQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C20SQ-7-F?
BZT52C20SQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C20SQ-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 BZT52C20SQ-7-F?
For technical support, including BZT52C20SQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C20SQ-7-F requirements.
6.How does Aetrix verify that BZT52C20SQ-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C20SQ-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 BZT52C20SQ-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C20SQ-7-F?
All BZT52C20SQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C20SQ-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 BZT52C20SQ-7-F part is unused and in its original packaging.
Return procedure for BZT52C20SQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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