My Inquiry
My Account
Diodes Incorporated BZT52HC20WF-7
- Part No.:
- BZT52HC20WF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC20WF-7.pdf
- Description:
- DIODE ZENER 20V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,520
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZT52HC20WF-7 from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 20 V (18.8–21.2 V range), 5 mA test current, 20 Ω maximum zener impedance at IZT, and ±0.05 µA maximum reverse leakage at 14 V. It operates within −65 °C to +150 °C and is AEC-Q101 qualified for automotive power rail clamping and voltage reference applications.
For engineers reviewing the BZT52HC20WF-7 datasheet, BZT52HC20WF-7 pinout, BZT52HC20WF-7 application, or BZT52HC20WF-7 equivalent, key selection criteria include its SOD123F package thermal performance (RθJA = 150 °C/W with 1 cm² cathode pad), low capacitance (60 pF @ 1 MHz), and tight 14.4–18.0 mV/°C temperature coefficient - critical for stable biasing in automotive sensor interfaces and power supply feedback loops.
Technical Context
This Zener diode functions as a precision voltage reference and overvoltage clamp in DC power rails and analog signal conditioning circuits. Its 20 V breakdown is specified at 5 mA with 20 Ω dynamic impedance, enabling predictable regulation under moderate load transients.
The device uses a planar silicon junction structure in a flat-lead SOD123F package, optimized for high power dissipation (830 mW with thermal pad) and low profile mounting. Its −65 °C to +150 °C operating range and AEC-Q101 qualification confirm suitability for under-hood automotive electronics where thermal cycling and reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8–21.2 V at 5 mA - defines clamping threshold for 24 V automotive systems |
| Zener Impedance (ZZT) | 20 Ω max at 5 mA - ensures minimal voltage shift under 1–10 mA load variations |
| Reverse Leakage (IR) | 0.05 µA max at 14 V - enables low-power standby mode operation without significant quiescent loss |
| Power Dissipation (PD) | 830 mW with 1 cm² cathode pad - supports sustained clamping during load dump events |
| Temperature Coefficient (TC) | +14.4 to +18.0 mV/°C - provides predictable positive drift for temperature-compensated references |
| Capacitance (CT) | 60 pF max at 1 MHz, 0 V - minimizes signal coupling in high-frequency sensor bias networks |
| Package | SOD123F (Type B) - 1.8 mm × 2.7 mm footprint with 0.35–0.85 mm height for space-constrained PCBs |
Pinout & Package
SOD123F (Type B) is a surface-mount, flat-lead plastic package with cathode band marking on the top surface. The device has two terminals: anode and cathode, with polarity indicated by a visible band adjacent to the cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward bias; connected to lower-potential node in Zener operation | Must be routed to ground or common return path when used as shunt regulator |
| Cathode | Current exit point during reverse breakdown; higher-potential terminal in Zener mode | Connected to protected rail or reference node; requires thermal pad for full 830 mW rating |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Green compound (halogen/antimony-free) | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - compliant with automotive OEM environmental requirements |
| Low-profile SOD123F package | Height ≤ 0.85 mm - enables use in ultra-thin modules such as ADAS camera ECUs and LED driver PCBs |
| 150 °C/W thermal resistance (with pad) | Enables 830 mW continuous dissipation at +85 °C ambient - sufficient for transient suppression in 24 V CAN bus nodes |
Applications
| Automotive Load Dump Protection | Industrial Sensor Reference |
|---|---|
Use Scenario: Clamping voltage spikes up to 40 V during alternator load dump in 24 V vehicle electrical systems. IC Role / Device Role / Timing Role: Shunt Zener clamp placed across main power input to limit rail voltage excursion. Use Value: Withstands 830 mW peak dissipation and maintains 20 V regulation tolerance across −40 °C to +125 °C engine bay temperatures. |
Use Scenario: Providing stable bias voltage for bridge-based pressure sensors in factory automation transmitters. IC Role / Device Role / Timing Role: Precision voltage reference for op-amp excitation circuitry. Use Value: 14.4–18.0 mV/°C TC allows predictable compensation; 60 pF capacitance avoids phase shift in 10 kHz sensor output bandwidth. |
| USB-C Power Delivery Clamp | Programmable Logic Controller Input Protection |
Use Scenario: Protecting 20 V PP (Programmable Power Supply) lines in USB-C PD sink controllers from overvoltage faults. IC Role / Device Role / Timing Role: Fast-acting shunt limiter triggered at 21.2 V maximum Zener voltage. Use Value: 20 Ω ZZT ensures sub-100 ns response to 100 V/µs transients; SOD123F footprint fits dense PD controller layouts. |
Use Scenario: Safeguarding 24 V digital input channels against field-wiring surges in industrial PLC backplanes. IC Role / Device Role / Timing Role: Primary overvoltage protection element before optocoupler or Schmitt trigger input stage. Use Value: 0.05 µA leakage at 14 V prevents false triggering; AEC-Q101 qualification ensures long-term stability in harsh factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5247BT1G | Zener voltage 20 V (19–21.2 V), 20 Ω ZZT, but SOD123 package (not SOD123F) and no AEC-Q101 qualification | Lacks automotive qualification; RθJA = 330 °C/W limits power handling to 375 mW | Select only for cost-sensitive consumer applications where thermal derating and reliability certification are not required |
| BZX84-C20 | 20 V Zener (18.8–21.2 V), 25 Ω ZZT, SOT23 package, AEC-Q101 qualified, but 300 mW PD max | Lower power rating restricts use to signal-level clamping; incompatible footprint | Choose when board space permits SOT23 and system energy per transient remains below 100 mJ |
Compared with MMSZ5247BT1G and BZX84-C20, BZT52HC20WF-7 uniquely combines AEC-Q101 qualification, 830 mW power capability via SOD123F thermal pad, and tight 20 Ω impedance - making it the only option suitable for sustained 24 V automotive rail clamping with thermal margin.
Availability
BZT52HC20WF-7 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor signal conditioning, USB-C programmable power supply protection, and PLC input surge suppression requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZT52HC20WF-7 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 and manufacturing operations across Asia and the Americas.
The BZT52HC series belongs to Diodes' AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive and industrial voltage regulation and transient suppression where reliability, thermal performance, and environmental compliance are mandatory.
FAQ
What is the maximum power dissipation of BZT52HC20WF-7 under standard PCB conditions?
The device delivers 830 mW maximum power dissipation when mounted on an FR-4 PCB with a 1 cm² copper pad connected to the cathode terminal, achieving a thermal resistance of 150 °C/W. Without the thermal pad, dissipation drops to 375 mW (RθJA = 330 °C/W), as verified in Diodes' DS36891 Rev. 4-2 test conditions.
Does BZT52HC20WF-7 meet automotive reliability standards?
Yes - it is fully qualified to AEC-Q101 standards, including stress tests for high-temperature reverse bias, temperature cycling, and electrostatic discharge. This qualification is documented in the official Diodes Incorporated product specification DS36891 and confirmed on their AEC-Q101-compliant product listing page.
How does the temperature coefficient affect voltage stability in real-world operation?
With a TC of +14.4 to +18.0 mV/°C, the Zener voltage increases predictably as junction temperature rises - e.g., +1.5 V drift from −40 °C to +125 °C. This behavior is leveraged in temperature-compensated reference designs where complementary TC components offset the drift.
Can BZT52HC20WF-7 replace older BZT52C20 models in existing designs?
Yes - it shares identical electrical specifications and SOD123F mechanical dimensions with the legacy BZT52C20, but adds AEC-Q101 qualification, halogen/antimony-free "Green" construction, and improved thermal performance via enhanced leadframe plating and mold compound.
BZT52HC20WF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±6%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 14 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-123F
BZT52HC20WF-7 FAQ
1.How can I place an order for BZT52HC20WF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC20WF-7 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 BZT52HC20WF-7 reliable?
The price and inventory of BZT52HC20WF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC20WF-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC20WF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC20WF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC20WF-7?
BZT52HC20WF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC20WF-7 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 BZT52HC20WF-7?
For technical support, including BZT52HC20WF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC20WF-7 requirements.
6.How does Aetrix verify that BZT52HC20WF-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC20WF-7 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 BZT52HC20WF-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC20WF-7?
All BZT52HC20WF-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC20WF-7, 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 BZT52HC20WF-7 part is unused and in its original packaging.
Return procedure for BZT52HC20WF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52HC20WF-7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
