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Diodes Incorporated BZT52C20Q-7-F
- Part No.:
- BZT52C20Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C20Q-7-F.pdf
- Description:
- DIODE ZENER 20V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,209
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Product details
Overview
BZT52C20Q-7-F from Diodes Incorporated is an automotive-grade surface-mount Zener diode with a nominal zener voltage of 20 V, ±5% tolerance (18.8–21.2 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 automotive power rails and sensor interface circuits.
For engineers reviewing the BZT52C20Q-7-F datasheet, BZT52C20Q-7-F pinout, BZT52C20Q-7-F application, or BZT52C20Q-7-F equivalent, key selection criteria include zener voltage accuracy at 5 mA test current, low dynamic impedance (55 Ω at IZT), temperature coefficient (+14.0 mV/°C), reverse leakage (≤0.1 µA at VR = 14.4 V), and AEC-Q101 qualification for under-hood electronics.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage across load variations and supply fluctuations. Its planar die construction ensures consistent breakdown characteristics and thermal stability over -65°C to +150°C operating range.
Designed for automated SMT assembly, it uses a SOD123 package with matte tin-plated alloy 42 leadframe, UL 94V-0 molded plastic body, and cathode band polarity marking - enabling reliable reflow soldering and high-volume production compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal, 18.8–21.2 V range at 5 mA - defines regulated output voltage under standard bias |
| Power Dissipation (PD) | 370 mW at TA = +25°C - sets maximum continuous power in ambient air without heatsinking |
| Zener Impedance (ZZT) | 55 Ω at IZT = 5 mA - determines regulation stiffness against load current changes |
| Reverse Leakage (IR) | ≤0.1 µA at VR = 14.4 V - ensures minimal quiescent current in standby protection circuits |
| Temperature Coefficient | +14.0 mV/°C - quantifies voltage drift per degree Celsius rise, critical for temperature-stable references |
| Thermal Resistance (RθJA) | 338 °C/W - indicates junction-to-ambient thermal path efficiency on FR-4 PCB with 1-inch copper pad |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (L × W × H); weight ≈ 0.010 g; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node; forms reference return path in shunt regulator topology |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input rail; clamps voltage to VZ when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Green, halogen-free construction | Meets <900 ppm Br/Cl and <1000 ppm Sb; compliant with EU RoHS 2011/65/EU |
| Low-profile SOD123 package | Enables high-density PCB layouts and compatibility with standard pick-and-place equipment |
| Stable 5 mA test current operation | Ensures repeatable VZ measurement and predictable regulation behavior in production testing |
Applications
| Automotive Sensor Power Supply | Industrial PLC Input Protection |
|---|---|
Use Scenario: Regulating 20 V supply for analog pressure sensors in engine management systems. IC Role / Device Role / Timing Role: Shunt voltage reference and overvoltage clamp protecting downstream op-amps and ADCs. Use Value: Maintains stable 20 V rail despite battery transients up to 36 V, leveraging 55 Ω ZZT and AEC-Q101 reliability. |
Use Scenario: Protecting 24 V digital input channels from ESD and surge events in factory automation controllers. IC Role / Device Role / Timing Role: Reverse-biased transient voltage suppressor placed before optocoupler input stage. Use Value: Limits input voltage to ≤21.2 V with <0.1 µA leakage at 14.4 V, preserving signal integrity and system uptime. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Reference |
Use Scenario: Providing feedback voltage reference for secondary-side regulation in isolated AC/DC adapters. IC Role / Device Role / Timing Role: Precision zener element in TL431-like feedback divider network. Use Value: Delivers ±5% VZ accuracy and +14.0 mV/°C TC to meet IEC 62368-1 safety margin requirements. |
Use Scenario: Generating stable bias voltage for low-noise amplifiers in portable ultrasound front-ends. IC Role / Device Role / Timing Role: Low-drift DC reference source in analog signal conditioning chain. Use Value: Enables <10 ppm/°C effective drift via TC-compensated design, supporting 16-bit ADC performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5242BQ-7-F | Zener voltage 12 V, 500 mW PD, same SOD123 package and AEC-Q101 rating | Lower voltage regulation; suited for 12 V automotive subsystems, not direct replacement for 20 V use | Select only if system rail is 12 V and tighter VZ tolerance (±5%) is required |
| BZX84-C20-7-F | 20 V Zener, but commercial-grade (non-AEC-Q101), SOT-23 package, 350 mW PD | Lacks automotive qualification; smaller footprint but higher thermal resistance (450 °C/W) | Acceptable for cost-sensitive industrial prototypes where AEC-Q101 is not mandated |
Compared with MMSZ5242BQ-7-F and BZX84-C20-7-F, BZT52C20Q-7-F uniquely combines 20 V regulation, AEC-Q101 compliance, SOD123 robustness, and 370 mW ambient-rated power - making it the only choice for production automotive 20 V rail stabilization.
Availability
BZT52C20Q-7-F is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52C20Q-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 computing markets.
The BZT52 series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum reverse voltage (VR) this Zener diode can withstand before breakdown?
The BZT52C20Q-7-F has a nominal zener voltage of 20 V with a guaranteed range of 18.8–21.2 V at 5 mA test current. Breakdown occurs within this range; it is not rated for sustained reverse voltage above 21.2 V. For safe operation, VR should remain below the upper limit to avoid uncontrolled conduction or thermal runaway.
Is this part suitable for use in a 24 V automotive system?
Yes - the BZT52C20Q-7-F is AEC-Q101 qualified and designed for automotive environments. With a 20 V zener voltage and 500 mW power rating at TL = +75°C, it reliably clamps transients up to 36 V when paired with appropriate series current limiting, meeting ISO 7637-2 pulse 5a requirements.
How does the temperature coefficient affect its performance in engine bay applications?
Its +14.0 mV/°C temperature coefficient means VZ increases by ~1.4 V over a 100°C rise (−40°C to +60°C ambient). In engine bay designs, this drift must be compensated in feedback networks or accounted for in tolerance budgets - especially where reference stability better than ±2% is required across temperature.
Can this diode replace a BZT52C18Q-7-F in the same PCB footprint?
Yes - both share identical SOD123 packaging, pinout, and mechanical dimensions. However, substituting a 20 V Zener for an 18 V unit raises the regulation point by 2 V, which may exceed downstream component voltage ratings or alter feedback loop behavior; electrical validation is required before drop-in replacement.
BZT52C20Q-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±6%
- Power - Max:
- 370 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-123
BZT52C20Q-7-F FAQ
1.How can I place an order for BZT52C20Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C20Q-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 BZT52C20Q-7-F reliable?
The price and inventory of BZT52C20Q-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 BZT52C20Q-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C20Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C20Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C20Q-7-F?
BZT52C20Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C20Q-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 BZT52C20Q-7-F?
For technical support, including BZT52C20Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C20Q-7-F requirements.
6.How does Aetrix verify that BZT52C20Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C20Q-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 BZT52C20Q-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C20Q-7-F?
All BZT52C20Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C20Q-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 BZT52C20Q-7-F part is unused and in its original packaging.
Return procedure for BZT52C20Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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