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Diodes Incorporated BZT52HC24WF-7
- Part No.:
- BZT52HC24WF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC24WF-7.pdf
- Description:
- DIODE ZENER 24V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:1,253
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Product details
Overview
BZT52HC24WF-7 from Diodes Incorporated is a surface-mount Zener diode with nominal 24 V zener voltage (22.8–25.6 V range), 5 mA test current, and 30 Ω maximum zener impedance at IZT. It provides precision voltage regulation in low-power analog circuits, ESD protection clamping, and reference voltage generation for sensor signal conditioning in automotive body control modules.
For engineers reviewing the BZT52HC24WF-7 datasheet, BZT52HC24WF-7 pinout, BZT52HC24WF-7 application, or BZT52HC24WF-7 equivalent, this device is selected for stable 24 V clamping in space-constrained PCBs where AEC-Q101 qualification, SOD123F package thermal performance, and <100 ppm/°C temperature coefficient stability are required.
Technical Context
This Zener operates in reverse breakdown mode with a specified 24 V nominal regulation point at 5 mA. Its 30 Ω dynamic impedance ensures tight voltage tolerance under varying load currents, while the −18.4 mV/°C temperature coefficient enables predictable drift compensation in temperature-stable references.
The device uses a planar silicon junction structure in a molded SOD123F package with cathode band polarity marking. Thermal resistance is 150 °C/W when mounted on 1 cm² cathode pad, supporting 830 mW power dissipation - critical for transient overvoltage suppression without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8–25.6 V at 5 mA - defines clamping threshold for 24 V rail protection |
| Zener Impedance (ZZT) | 30 Ω max at 5 mA - limits output voltage variation under ±1 mA load change |
| Power Dissipation (PD) | 830 mW at TA = 25°C with 1 cm² cathode pad - enables robust surge handling |
| Reverse Current (IR) | 0.05 µA max at 16.8 V - ensures negligible leakage in high-impedance bias networks |
| Capacitance (CT) | 55 pF max at 1 MHz, 0 V - maintains signal integrity in <10 MHz analog sensing paths |
| Temperature Coefficient (TC) | −18.4 mV/°C - allows accurate thermal drift modeling in automotive ambient ranges |
Pinout & Package
Package: SOD123F (Type B), flat-lead surface-mount plastic case with cathode band marking; 0.015 g weight; UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; forms reference ground for clamp network |
| Cathode | Zener breakdown terminal / regulation output node | Connected to protected 24 V rail; carries clamping current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified reliability | Validated for automotive electronics per stress-test requirements including HTOL, TC, HAST |
| SOD123F thermal performance | 150 °C/W RθJA with 1 cm² copper pad - enables 830 mW operation without derating below 125°C |
| Green compound construction | Halogen- and antimony-free molding compound (<900 ppm Br+Cl, <1000 ppm Sb) - meets automotive ELV compliance |
| Cathode band polarity marking | Visible top-side band aligned with cathode terminal - eliminates assembly orientation errors on automated SMT lines |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping 24 V supply rail against load-dump transients up to 40 V in door module ECUs. IC Role / Device Role / Timing Role: Zener clamping diode in parallel with LDO input to limit voltage stress on downstream regulators. Use Value: 24 V regulation window and 830 mW power handling absorb 100 ms/35 V pulses without degradation. |
Use Scenario: Providing stable 24 V reference for 4–20 mA transmitter loop-powered sensors. IC Role / Device Role / Timing Role: Precision voltage reference element in two-wire current-loop feedback path. Use Value: 30 Ω ZZT and −18.4 mV/°C TC enable <±0.5% reference stability across −40°C to +125°C. |
| USB-C Power Delivery Protection | Medical Diagnostic Equipment Biasing |
Use Scenario: Overvoltage protection on 20 V PPS (Programmable Power Supply) negotiation lines. IC Role / Device Role / Timing Role: Fast-response clamp limiting bus voltage spikes during PD contract renegotiation. Use Value: 55 pF capacitance avoids signal integrity loss on 300 kHz BMC communication lines. |
Use Scenario: Biasing photodiode amplifiers in portable ultrasound front-ends requiring ultra-low leakage. IC Role / Device Role / Timing Role: Low-noise voltage reference for op-amp offset calibration circuitry. Use Value: 0.05 µA reverse leakage at 16.8 V prevents DC error injection into high-gain analog chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5242B-TP (Micro Commercial) | 24 V nominal, 35 Ω ZZT, SOD-123 package, no AEC-Q101 qualification | Non-automotive industrial use only; lacks automotive reliability validation | Select when cost sensitivity outweighs AEC-Q101 requirement and thermal margin is >10% |
| BZX84-C24 (Nexperia) | 24 V nominal, 60 Ω ZZT, SOT-23 package, AEC-Q101 qualified | Higher impedance limits regulation accuracy; smaller SOT-23 limits power handling to 350 mW | Choose only if board space is constrained and peak clamping energy <0.1 J |
Compared with MMSZ5242B-TP and BZX84-C24, BZT52HC24WF-7 delivers superior thermal capability (830 mW vs. ≤350 mW), tighter impedance (30 Ω vs. ≥35 Ω), and full automotive qualification - making it the preferred choice for 24 V rail protection where reliability and power margin are critical.
Availability
BZT52HC24WF-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, USB-C power delivery protection circuits, and medical diagnostic equipment requiring stable component supply and AEC-Q101 compliance.
Supply support for BZT52HC24WF-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 centers across Asia and manufacturing in China, Taiwan, and the U.S.
The BZT52HC series targets automotive and industrial applications requiring high-reliability, low-profile Zener regulation - designed specifically for AEC-Q101-compliant 24 V system protection and precision reference functions.
FAQ
What is the maximum continuous power dissipation for BZT52HC24WF-7 at 100°C ambient?
At 100°C ambient temperature, the device's power dissipation must be derated linearly from 830 mW at 25°C using the 150 °C/W thermal resistance. This yields a maximum of 725 mW (830 mW − (100 − 25) × 150 mW/°C). Derating follows the curve in Figure 1 of DS36891 Rev. 4-2.
Does BZT52HC24WF-7 support bidirectional transient suppression?
No - it is a unidirectional Zener diode optimized for reverse-bias clamping only. Forward conduction occurs at ~0.9 V, but the device is not rated for sustained forward current beyond 250 mA. For bidirectional TVS protection, a dedicated bidirectional TVS like SMAJ24A is required.
How does the −18.4 mV/°C temperature coefficient affect voltage regulation accuracy?
Over a −40°C to +125°C range, the coefficient causes a total drift of −2.94 V (165°C × −18.4 mV/°C), shifting the nominal 24 V regulation point to 21.06–26.94 V. System-level compensation (e.g., series resistor trimming or digital calibration) is needed for sub-1% accuracy across full temperature range.
Can BZT52HC24WF-7 be used in place of BZT52C24 in an existing design?
Yes, with verification of thermal layout - both share identical 24 V rating and SOD-123F footprint, but BZT52HC24WF-7 offers higher power (830 mW vs. 500 mW) and AEC-Q101 qualification. No schematic changes are needed, though thermal pad area should match the 1 cm² recommendation for full 830 mW capability.
BZT52HC24WF-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):
- 24 V
- Tolerance:
- ±5.83%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 16.8 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
BZT52HC24WF-7 FAQ
1.How can I place an order for BZT52HC24WF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC24WF-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 BZT52HC24WF-7 reliable?
The price and inventory of BZT52HC24WF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC24WF-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC24WF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC24WF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC24WF-7?
BZT52HC24WF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC24WF-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 BZT52HC24WF-7?
For technical support, including BZT52HC24WF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC24WF-7 requirements.
6.How does Aetrix verify that BZT52HC24WF-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC24WF-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 BZT52HC24WF-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC24WF-7?
All BZT52HC24WF-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC24WF-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 BZT52HC24WF-7 part is unused and in its original packaging.
Return procedure for BZT52HC24WF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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