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Diodes Incorporated BZX84B24Q-7-F
- Part No.:
- BZX84B24Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84B24Q-7-F.pdf
- Description:
- DIODE ZENER 24V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BZX84B24Q-7-F from Diodes Incorporated is an AEC-Q101 qualified, ±2% tolerance precision Zener diode in SOT23 package with nominal 24 V zener voltage at 5 mA test current, 350 mW power dissipation, and 70 Ω dynamic impedance at IZT, designed for voltage regulation and reference in automotive power management circuits.
For engineers reviewing the BZX84B24Q-7-F datasheet, BZX84B24Q-7-F pinout, BZX84B24Q-7-F application, or BZX84B24Q-7-F equivalent, key selection criteria include zener voltage tolerance, thermal resistance (357 °C/W), reverse leakage (<0.1 µA at 16.8 V), temperature coefficient (+18.4 mV/°C), and automotive qualification status.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its 24 V nominal zener voltage is specified at 5 mA test current with ±2% tolerance, and it exhibits a positive temperature coefficient of +18.4 mV/°C - critical for temperature-compensated reference designs.
The device delivers 350 mW power dissipation when terminals are held at ambient temperature, with thermal resistance of 357 °C/W, and supports operation across -65 °C to +150 °C. It features low capacitance (~25 pF) and meets AEC-Q101 stress testing requirements for automotive reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24 V nominal at 5 mA; min 23.5 V, max 24.5 V - ensures tight regulation in feedback loops |
| Power Dissipation (PD) | 350 mW - defines maximum continuous power handling under ambient-terminated conditions |
| Zener Impedance (ZZT) | 70 Ω at 5 mA - determines output voltage variation under load transients |
| Reverse Leakage (IR) | <0.1 µA at 16.8 V - guarantees minimal quiescent current in high-impedance bias networks |
| Temperature Coefficient | +18.4 mV/°C - enables predictable drift compensation in temperature-sensitive references |
| Thermal Resistance (RθJA) | 357 °C/W - informs PCB thermal design for sustained operation at rated power |
| Package | SOT23 - surface-mount footprint compatible with automated assembly and space-constrained layouts |
Pinout & Package
Package: SOT23 - three-terminal plastic-molded case with matte tin-plated alloy 42 leadframe; polarity indicated by cathode band on top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to regulated output node; carries reverse current during regulation |
| NC / Heat Sink (Pin 3) | Non-connected / thermal path | No internal connection; serves as mechanical anchor and minor thermal relief via PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| ±2% VZ tolerance | Reduces need for post-production trimming in precision voltage reference applications |
| Lead-free & halogen-free "Green" construction | Complies with RoHS 3 (2015/863/EU) and contains <900 ppm Br/Cl, <1000 ppm Sb |
| 350 mW power rating at ambient-terminated condition | Enables use in compact 12 V/24 V automotive subsystems without forced cooling |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for microcontroller ADC inputs in door module ECUs. IC Role / Device Role / Timing Role: Precision voltage reference for analog front-end biasing and supply monitoring. Use Value: ±2% VZ tolerance and AEC-Q101 qualification ensure stable ADC accuracy across -40 °C to +125 °C operating range. |
Use Scenario: Providing stable 24 V reference for 4–20 mA transmitter loop power supplies. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant voltage across current-sense resistor. Use Value: Low 0.1 µA reverse leakage at 16.8 V minimizes error in low-current loop calibration. |
| Automotive Infotainment Power Sequencing | Medical Diagnostic Equipment Reference |
Use Scenario: Clamping and regulating auxiliary 24 V rail for display backlight drivers. IC Role / Device Role / Timing Role: Overvoltage protection and voltage stabilization element. Use Value: 350 mW rating and +18.4 mV/°C TC allow predictable clamping behavior during thermal transients. |
Use Scenario: Generating stable reference for analog-to-digital conversion in portable ultrasound units. IC Role / Device Role / Timing Role: Primary voltage reference in isolated analog signal chain. Use Value: Low 25 pF capacitance avoids phase shift in high-frequency sensor signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4702T1G | 24 V nominal, ±5% tolerance, 500 mW PD, SOD-123 package | Higher power but looser tolerance; not AEC-Q101 qualified | Select for cost-sensitive industrial use where automotive qualification is unnecessary |
| BZX84-C24-7-F | 24 V nominal, ±5% tolerance, same SOT23 package, non-automotive grade | Lacks AEC-Q101 qualification and tighter tolerance; higher IR (0.5 µA) | Use only in non-automotive consumer or computing applications with relaxed reliability requirements |
Compared with MMSZ4702T1G and BZX84-C24-7-F, BZX84B24Q-7-F uniquely combines ±2% tolerance, AEC-Q101 qualification, and SOT23 compatibility - making it the sole choice for automotive voltage reference designs requiring both precision and reliability.
Availability
BZX84B24Q-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial 4–20 mA transmitters, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.
Supply support for BZX84B24Q-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.
This device belongs to the BZX84B series of precision Zener diodes engineered specifically for automotive and industrial voltage reference and regulation applications demanding high stability and AEC-Q101 compliance.
FAQ
What is the maximum reverse voltage before breakdown for BZX84B24Q-7-F?
The nominal zener voltage is 24 V at 5 mA test current, with guaranteed minimum and maximum values of 23.5 V and 24.5 V respectively. Breakdown occurs within this range under standard test conditions; operation below 23.5 V results in negligible reverse current (<0.1 µA at 16.8 V).
Is BZX84B24Q-7-F suitable for use in high-temperature under-hood automotive environments?
Yes - it is qualified to AEC-Q101 and rated for operation from -65 °C to +150 °C. Its thermal resistance of 357 °C/W and stable +18.4 mV/°C temperature coefficient enable reliable performance in engine control unit and transmission control applications.
How does the ±2% tolerance impact circuit accuracy compared to standard Zeners?
The ±2% tolerance reduces initial voltage error to ±0.48 V at 24 V, eliminating need for external trimming in most feedback and reference circuits. This improves yield in automotive production and enhances long-term stability over temperature versus ±5% alternatives.
Can BZX84B24Q-7-F replace BZX84-C24 in existing designs?
Electrically compatible in SOT23 footprint, but BZX84B24Q-7-F offers tighter ±2% tolerance, lower leakage (<0.1 µA vs. 0.5 µA), and AEC-Q101 qualification. Replacement requires validation of thermal margin due to identical 350 mW rating but different derating curves.
BZX84B24Q-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 16.8 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:
- SOT-23-3
BZX84B24Q-7-F FAQ
1.How can I place an order for BZX84B24Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B24Q-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 BZX84B24Q-7-F reliable?
The price and inventory of BZX84B24Q-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 BZX84B24Q-7-F is usually 5 days.
3.What payment methods are accepted for BZX84B24Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B24Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B24Q-7-F?
BZX84B24Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B24Q-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 BZX84B24Q-7-F?
For technical support, including BZX84B24Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B24Q-7-F requirements.
6.How does Aetrix verify that BZX84B24Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84B24Q-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 BZX84B24Q-7-F meets industry standards.
7.What is the process for return or replacement of BZX84B24Q-7-F?
All BZX84B24Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B24Q-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 BZX84B24Q-7-F part is unused and in its original packaging.
Return procedure for BZX84B24Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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