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Taiwan Semiconductor Corporation BZX84C24 RFG
- Part No.:
- BZX84C24 RFG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C24 RFG.pdf
- Description:
- DIODE ZENER 24V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,937
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Product details
Overview
BZX84C24 RFG from Taiwan Semiconductor is a surface-mount Zener diode with nominal zener voltage 24 V, power dissipation 300 mW, and SOT-23 package, designed for precision voltage reference and low-voltage stabilization in DC/DC converters and lighting circuits.
For engineers reviewing the BZX84C24 RFG datasheet, BZX84C24 RFG pinout, BZX84C24 RFG application, or BZX84C24 RFG equivalent, key selection criteria include zener voltage tolerance (±5% at 24 V), zener impedance (70 Ω at 5 mA), temperature coefficient (+18.4 mV/°C), and halogen-free green compound compliance per IEC 61249-2-21.
Technical Context
This device operates as a single-die, silicon planar Zener diode optimized for stable reverse-breakdown regulation under controlled current conditions. It features a nominal zener voltage of 24 V with min/max limits of 22.8 V and 25.6 V at test current IZT = 5 mA, and exhibits a positive temperature coefficient of +18.4 mV/°C.
Thermal performance is defined by a junction-to-ambient thermal resistance of 417 °C/W and a maximum junction temperature of +150 °C. Its SOT-23 package supports automated assembly and meets J-STD-020 moisture sensitivity Level 1 and JESD 201 Class 1A whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ @ IZT = 5 mA | 24 V nominal, 22.8–25.6 V range - defines stable regulation point for reference design |
| PD | 300 mW - sets maximum continuous power handling at TA = 25 °C |
| ZZT | 70 Ω - indicates dynamic impedance affecting regulation accuracy under load variation |
| IZK | 1.0 mA - minimum knee current to enter useful breakdown region |
| TC (VZ) | +18.4 mV/°C - quantifies voltage drift with temperature, critical for precision references |
| Junction temp. max. | +150 °C - determines thermal derating envelope in high-ambient designs |
| Package | SOT-23 - enables high-density PCB layout and reflow-compatible assembly |
Pinout & Package
Package: SOT-23 - three-terminal surface-mount plastic package with matte tin-plated leads, 8 mg weight, UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower potential side in reverse-biased Zener operation |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher potential side; defines regulated output node when used as shunt reference |
| No-Connect / Heat Sink (Pin 3) | Internal die attachment pad | Not electrically connected; serves mechanical support and minor thermal path in SOT-23 |
Key Features
| Feature | Design Value |
|---|---|
| Zener voltage tolerance | ±5% at 24 V ensures predictable regulation across production lots |
| Halogen-free construction | Complies with IEC 61249-2-21 - required for RoHS-compliant industrial and consumer end equipment |
| Moisture sensitivity level | Level 1 per J-STD-020 - eliminates bake requirement before reflow, reducing manufacturing cost |
| Low leakage current | ≤0.1 µA at 16.8 V - minimizes standby power loss in battery-powered voltage monitors |
| Thermal stability | 150 °C max junction temperature supports operation in enclosed or high-ambient environments |
Applications
| On-board DC/DC Converter | LED Lighting Driver |
|---|---|
Use Scenario: Provides feedback reference voltage for secondary-side regulation in isolated flyback converters. IC Role / Device Role / Timing Role: Shunt voltage reference stabilizing optocoupler input bias and error amplifier threshold. Use Value: Tight 22.8–25.6 V tolerance and +18.4 mV/°C TC enable ±2% output regulation over -40 to +85 °C ambient. | Use Scenario: Sets constant-current sense threshold in linear LED driver ICs. IC Role / Device Role / Timing Role: Precision voltage clamp defining current-sense comparator trip point. Use Value: Low 70 Ω zener impedance maintains stable threshold despite supply ripple, improving LED brightness consistency. |
| AC-DC Adapter Reference | Industrial Sensor Signal Conditioning |
Use Scenario: Supplies stable bias to TL431-like shunt regulators in low-cost offline adapters. IC Role / Device Role / Timing Role: Primary voltage reference establishing regulation setpoint for feedback loop. Use Value: 300 mW power rating allows direct use without series resistor in <5 mA applications, simplifying BOM. | Use Scenario: Protects analog front-end inputs from overvoltage transients while providing rail clamp. IC Role / Device Role / Timing Role: Bidirectional ESD protection and precision clamping element. Use Value: 24 V breakdown with 0.1 µA leakage at 16.8 V ensures minimal signal loading during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5248BS-7-F (Diodes Inc.) | 24 V nominal, 350 mW PD, 100 Ω ZZT, SOT-23 package | Higher power rating but higher dynamic impedance reduces regulation precision | Preferred where higher surge tolerance is needed; verify thermal margin in compact layouts |
| BZX84-C24,115 (Nexperia) | 24 V nominal, 300 mW PD, 70 Ω ZZT, same SOT-23, AEC-Q200 qualified | Automotive-grade qualification adds reliability testing not required for industrial use | Choose when automotive qualification or extended temperature validation is mandated |
Compared with BZX84C24 RFG, MMBZ5248BS-7-F offers higher power headroom but sacrifices regulation accuracy, while BZX84-C24,115 delivers identical electrical specs with added automotive qualification-increasing cost and lead time without benefit in non-automotive designs.
Availability
BZX84C24 RFG is available at Aetrix Electronics and suitable for on-board DC/DC converters, LED lighting drivers, and AC-DC adapters requiring stable component supply, RoHS compliance, and halogen-free materials.
Supply support for BZX84C24 RFG 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, analog ICs, and protection components for industrial and consumer markets.
The BZX84C24 RFG belongs to TSC's BZX84C series of surface-mount Zener diodes, engineered for high-volume, automated assembly in cost-sensitive power management and voltage reference applications.
FAQ
What is the nominal zener voltage and tolerance of BZX84C24 RFG?
The BZX84C24 RFG has a nominal zener voltage of 24 V with a guaranteed range of 22.8 V to 25.6 V at test current IZT = 5 mA, corresponding to ±5% tolerance. This specification is verified per the manufacturer's electrical test conditions and applies across the full operating temperature range of −65 °C to +150 °C.
Does BZX84C24 RFG meet RoHS and halogen-free requirements?
Yes, BZX84C24 RFG is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed by its "G" suffix in the ordering code and documentation in the Taiwan Semiconductor datasheet Version F2001. The green compound formulation eliminates brominated flame retardants and chlorine-based additives.
What is the zener impedance of BZX84C24 RFG and why does it matter?
The BZX84C24 RFG has a typical zener impedance (ZZT) of 70 Ω at IZT = 5 mA. This value directly impacts regulation accuracy: lower impedance yields smaller output voltage variation under changing load current, making it critical for stable reference applications such as feedback networks in switching regulators.
Can BZX84C24 RFG be used in automotive applications?
The BZX84C24 RFG is not AEC-Q200 qualified. While it operates from −65 °C to +150 °C, it lacks the stress testing and lot traceability required for automotive use. For automotive designs, consider alternatives like Nexperia's BZX84-C24,115, which carries full AEC-Q200 certification and identical electrical specs.
What is the maximum power dissipation and how does it derate with temperature?
BZX84C24 RFG has a maximum power dissipation of 300 mW at TA = 25 °C, derating linearly above that ambient temperature at 0.72 mW/°C (based on RθJA = 417 °C/W). At 85 °C ambient, usable power drops to approximately 172 mW - a key constraint for thermally constrained PCB layouts.
BZX84C24 RFG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- 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:
- ±5%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23
BZX84C24 RFG FAQ
1.How can I place an order for BZX84C24 RFG through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C24 RFG 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 BZX84C24 RFG reliable?
The price and inventory of BZX84C24 RFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C24 RFG is usually 5 days.
3.What payment methods are accepted for BZX84C24 RFG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C24 RFG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C24 RFG?
BZX84C24 RFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C24 RFG 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 BZX84C24 RFG?
For technical support, including BZX84C24 RFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C24 RFG requirements.
6.How does Aetrix verify that BZX84C24 RFG is sourced from the original manufacturer or authorized distributors?
All BZX84C24 RFG 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 BZX84C24 RFG meets industry standards.
7.What is the process for return or replacement of BZX84C24 RFG?
All BZX84C24 RFG units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C24 RFG, 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 BZX84C24 RFG part is unused and in its original packaging.
Return procedure for BZX84C24 RFG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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