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Diodes Incorporated BZT52HC20WFQ-7
- Part No.:
- BZT52HC20WFQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC20WFQ-7.pdf
- Description:
- DIODE ZENER 20V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:7,030
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Product details
Overview
BZT52HC20WFQ from Diodes Incorporated is an AEC-Q101 qualified surface-mount Zener diode in SOD123F package, providing precise 20 V nominal zener voltage (18.8–21.2 V range) at 5 mA test current, with 220 Ω maximum zener impedance and ±0.05 µA maximum reverse leakage at 14.0 V, designed for automotive voltage regulation and overvoltage protection circuits.
For engineers reviewing the BZT52HC20WFQ datasheet, BZT52HC20WFQ pinout, BZT52HC20WFQ application, or BZT52HC20WFQ equivalent, key selection criteria include its 375 mW power dissipation on standard FR-4 PCB, 14.4–18.0 mV/°C temperature coefficient, 60 pF capacitance at 1 MHz, and cathode-band polarity marking-critical for ESD-sensitive and high-reliability automotive subsystems.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. Its 20 V nominal rating targets mid-range supply rail clamping and feedback node stabilization in DC-DC converters and sensor signal conditioning paths.
The device features dual thermal ratings: 375 mW (RθJA = 330 °C/W) on minimal pad layout and 830 mW (RθJA = 150 °C/W) with 1 cm² cathode copper pour-enabling scalable thermal design across cost- and performance-constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8–21.2 V at IZT = 5 mA - defines tight regulation window for 20 V nominal rail supervision |
| Zener Impedance (ZZT) | 220 Ω max at 5 mA - limits output voltage deviation under dynamic load transients |
| Power Dissipation (PD) | 375 mW (FR-4, min pad) / 830 mW (1 cm² cathode pour) - sets PCB layout-dependent thermal headroom |
| Temperature Coefficient (TC) | +14.4 to +18.0 mV/°C - quantifies positive drift rate requiring compensation in precision references |
| Reverse Leakage (IR) | 0.05 µA max at VR = 14.0 V - ensures minimal quiescent current in always-on monitoring circuits |
| Capacitance (CT) | 60 pF max at f = 1 MHz, VR = 0 V - constrains high-frequency noise coupling in analog signal paths |
Pinout & Package
Package: SOD123F - flat-lead, low-profile surface-mount package with matte tin annealed terminals over copper alloy leadframe; moisture sensitivity level 1 per J-STD-020; weight ≈ 0.015 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node in shunt regulation; requires PCB trace routing compatible with thermal pad constraints |
| Cathode | Zener breakdown terminal / voltage reference output | Marked by visible band; must be routed to regulated node with controlled impedance and thermal relief for 1 cm² copper pour option |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per IATF 16949 manufacturing |
| SOD123F low-profile package | Height ≤ 0.9 mm (max), footprint 1.8 × 2.7 mm - enables dense placement in space-constrained ADAS ECUs and body control modules |
| Halogen- and antimony-free "Green" construction | <900 ppm Br, <900 ppm Cl (<1500 ppm total Br+Cl), <1000 ppm Sb - meets global environmental compliance mandates without sacrificing thermal performance |
| Cathode band polarity marking | Visible molded band on cathode end - eliminates orientation errors during automated placement and visual inspection |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: Voltage reference for microcontroller ADC biasing and sensor excitation in engine management systems. IC Role / Device Role / Timing Role: Shunt voltage regulator stabilizing 20 V auxiliary rail feeding precision op-amps and current-sense amplifiers. Use Value: Tight 18.8–21.2 V tolerance and low 0.05 µA leakage ensure consistent ADC full-scale accuracy across -40°C to +125°C ambient. |
Use Scenario: Overvoltage clamp protecting 4–20 mA transmitter input circuitry from field wiring faults. IC Role / Device Role / Timing Role: Reverse-biased Zener limiting transient-induced rail excursion above 21.2 V. Use Value: 220 Ω zener impedance and 60 pF capacitance prevent signal distortion while absorbing >100 V surge events per IEC 61000-4-5 Level 3. |
| Automotive Infotainment Power Sequencing | Medical Patient Monitor Sensor Interface |
Use Scenario: Soft-start reference for multi-rail DC-DC sequencer controlling display backlight and audio codec power-up timing. IC Role / Device Role / Timing Role: Stable 20 V reference source for comparator-based sequencing logic. Use Value: +14.4 to +18.0 mV/°C TC enables predictable trip-point shift across operating temperature, simplifying timing margin analysis. |
Use Scenario: ESD protection and bias stabilization for thermistor and RTD front-end amplifiers. IC Role / Device Role / Timing Role: Low-leakage (<0.05 µA) voltage clamp maintaining signal integrity in ultra-low-current sensor bridges. Use Value: 60 pF capacitance avoids phase shift in <1 kHz physiological signal bands, preserving diagnostic accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5246BS-7-F | 20 V nominal (19–21.1 V), 500 mW PD, SOD123 package, 200 Ω ZZT, no AEC-Q101 qualification | Higher power rating but lacks automotive qualification and tighter VZ tolerance | Select when higher thermal margin is needed and automotive qualification is not required |
| BZX84-C20-7-F | 20 V nominal (18.8–21.2 V), 350 mW PD, SOT23 package, 500 Ω ZZT, AEC-Q101 qualified | Same VZ range but higher impedance and smaller SOT23 footprint with inferior thermal resistance | Select when board space is critical and lower zener impedance is acceptable |
Compared with MMSZ5246BS-7-F and BZX84-C20-7-F, BZT52HC20WFQ delivers superior thermal performance via SOD123F's optimized copper pour capability, tighter zener impedance control, and full automotive change control-making it optimal for safety-critical voltage reference nodes where long-term stability and PPAP traceability are mandatory.
Availability
BZT52HC20WFQ is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, infotainment power sequencers, and medical sensor interfaces requiring stable component supply with full AEC-Q101 documentation and IATF 16949 traceability.
Supply support for BZT52HC20WFQ 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 with ISO/TS 16949 and ISO 9001 certifications.
The BZT52HC series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for voltage regulation, overvoltage protection, and reference applications in harsh-environment electronic control units where AEC-Q101 compliance and PPAP readiness are mandatory.
FAQ
What is the maximum reverse voltage before breakdown for BZT52HC20WFQ?
The BZT52HC20WFQ exhibits a guaranteed zener breakdown voltage range of 18.8 V to 21.2 V at 5 mA test current. It does not specify a distinct "maximum reverse voltage before breakdown"; instead, the device enters controlled reverse conduction within this range. Below 18.8 V, reverse leakage remains ≤0.05 µA at 14.0 V, confirming stable non-conducting behavior.
Can BZT52HC20WFQ be used in place of a 20 V Zener in a non-automotive consumer design?
Yes-its electrical specifications (20 V nominal zener voltage, 220 Ω impedance, 60 pF capacitance) are fully applicable outside automotive contexts. However, its AEC-Q101 qualification, PPAP documentation, and IATF 16949 manufacturing add cost and traceability unnecessary for consumer applications where alternatives like MMSZ5246BS-7-F may offer better value.
How does the SOD123F package improve thermal performance over standard SOD123?
The SOD123F package features a flat-lead design with enhanced thermal path geometry, enabling 830 mW power dissipation when mounted with a 1 cm² cathode copper pour (RθJA = 150 °C/W), versus 375 mW on minimal pads (RθJA = 330 °C/W). This 122% increase in thermal capacity supports higher continuous power handling in compact automotive modules.
Is the cathode band the only polarity indicator on BZT52HC20WFQ?
Yes-the cathode is unambiguously identified by a molded band on the package body, aligned with the cathode terminal per Diodes' mechanical drawings. No secondary markings (e.g., dot, notch, or alphanumeric code) are used. The band must be oriented toward the higher-potential node in shunt regulator configurations.
BZT52HC20WFQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Bulk
- 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52HC20WFQ-7 FAQ
1.How can I place an order for BZT52HC20WFQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC20WFQ-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 BZT52HC20WFQ-7 reliable?
The price and inventory of BZT52HC20WFQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC20WFQ-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC20WFQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC20WFQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC20WFQ-7?
BZT52HC20WFQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC20WFQ-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 BZT52HC20WFQ-7?
For technical support, including BZT52HC20WFQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC20WFQ-7 requirements.
6.How does Aetrix verify that BZT52HC20WFQ-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC20WFQ-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 BZT52HC20WFQ-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC20WFQ-7?
All BZT52HC20WFQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC20WFQ-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 BZT52HC20WFQ-7 part is unused and in its original packaging.
Return procedure for BZT52HC20WFQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52HC20WFQ-7 Tags
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