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Diodes Incorporated BZX84C24W-7
- Part No.:
- BZX84C24W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84C24W-7.pdf
- Description:
- DIODE ZENER 24V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,911
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Product details
Overview
BZX84C24W-7 from Diodes Incorporated is a 24 V, 200 mW surface-mount Zener diode in SOT-323 package, with nominal zener voltage 24 V (min 22.8 V, max 25.6 V at IZT = 5 mA), zener impedance 70 Ω at 5 mA, and reverse current ≤0.1 µA at 16.8 V, used for precision voltage regulation and reference in low-power analog circuits.
For engineers reviewing the BZX84C24W-7 datasheet, BZX84C24W-7 pinout, BZX84C24W-7 application, or BZX84C24W-7 equivalent, key selection criteria include zener voltage tolerance (±4.2%), thermal resistance (625 K/W), RoHS-compliant lead-free plating, ultra-small SOT-323 footprint, and temperature coefficient (+18.4 to +22.0 mV/°C).
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations and supply fluctuations. It delivers regulated output with 5 mA test current, exhibits low dynamic impedance (70 Ω), and supports operation from −65 °C to +125 °C ambient.
The device uses planar die construction and green molding compound compliant with UL 94V-0. Its thermal performance assumes mounting on FR4 PCB with recommended pad layout; power derating begins above 25 °C at 1.6 mW/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24 V nominal, 22.8–25.6 V range at 5 mA - defines regulation setpoint with ±4.2% tolerance |
| Power Dissipation (PD) | 200 mW at 25 °C - limits continuous steady-state power handling on standard FR4 layout |
| Zener Impedance (ZZT) | 70 Ω at 5 mA - determines regulation stiffness under small-signal load changes |
| Reverse Current (IR) | ≤0.1 µA at 16.8 V - ensures minimal leakage below knee voltage in standby bias networks |
| Temp Coefficient (αVZ) | +18.4 to +22.0 mV/°C - quantifies positive drift of VZ with rising junction temperature |
| Thermal Resistance (RθJA) | 625 K/W - sets junction-to-ambient rise per watt; requires thermal-aware PCB layout |
| Package | SOT-323 - 2.2 mm × 1.35 mm × 0.9 mm footprint ideal for space-constrained consumer and portable designs |
Pinout & Package
SOT-323 package with three terminals: anode (pin 1), cathode (pin 2), and no internal connection (pin 3). Cathode marked by band; polarity confirmed per top-view schematic in DS30066 Rev. 15-2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node in reverse-bias regulation configuration |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to regulated output node; band-marked for orientation identification |
| NC (Pin 3) | No internal connection | Unused terminal; electrically isolated and not bonded to die |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight VZ tolerance control and repeatable zener knee characteristics |
| Lead-free / RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe meets global environmental compliance requirements |
| Green molding compound | Halogen-free, UL 94V-0 rated encapsulant reduces environmental impact without sacrificing flammability safety |
| Moisture sensitivity Level 1 | Eliminates bake preconditioning before reflow; compatible with standard SMT assembly processes |
Applications
| Portable Power Monitoring | ADC Reference Stabilization |
|---|---|
Use Scenario: Battery voltage sensing in wearables and Bluetooth earbuds where supply headroom is limited. IC Role / Device Role / Timing Role: Zener reference for comparator input or ADC bias network. Use Value: Provides stable 24 V-derived scaling reference despite battery discharge down to 2.5 V with <0.1 µA leakage. | Use Scenario: Precision 12-bit SAR ADC requiring stable reference voltage in industrial sensor nodes. IC Role / Device Role / Timing Role: Shunt reference source for REF+ input, replacing higher-cost IC references. Use Value: Delivers 24 V regulation with 70 Ω dynamic impedance, enabling <0.05% full-scale error contribution at 5 mA bias. |
| Overvoltage Clamp Protection | Low-Power Microcontroller Reset Circuit |
Use Scenario: Protecting 24 V logic interface pins from transient surges in building automation controllers. IC Role / Device Role / Timing Role: Reverse-biased shunt clamp limiting voltage to 25.6 V peak. Use Value: Absorbs up to 200 mW surge energy while holding clamped voltage within ±4.2% of nominal. | Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers powered from 24 V supply via LDO. IC Role / Device Role / Timing Role: Zener-based voltage divider feeding RC reset generator. Use Value: Enables accurate 2.0 V reset threshold with temperature coefficient compensated by resistor ratio selection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5242BS-7-F | 24 V nominal, 350 mW PD, SOT-323, 100 Ω ZZT at 10 mA | Higher power rating but looser VZ tolerance (±5%) and higher ZZT | Preferred when higher surge energy absorption is required and tighter regulation is secondary |
| BZX84-C24LT1G | 24 V nominal, 300 mW PD, SOT-23, 70 Ω ZZT at 5 mA, −65 to +150 °C TJ | Larger SOT-23 package, wider temperature range, same VZ spec | Chosen when board layout allows larger footprint and extended high-temp operation is needed |
Compared with MMBZ5242BS-7-F and BZX84-C24LT1G, BZX84C24W-7 offers best-in-class VZ tolerance (±4.2%) and lowest ZZT in SOT-323, making it optimal for precision low-power regulation where space and accuracy are constrained.
Availability
BZX84C24W-7 is available at Aetrix Electronics and suitable for portable power monitoring, ADC reference stabilization, overvoltage clamp protection, and low-power microcontroller reset circuits requiring stable component supply and consistent parametric performance.
Supply support for BZX84C24W-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, manufacturing, and sales operations across Asia, Europe, and North America.
The BZX84 series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-sensitive, space-constrained voltage regulation and reference applications in consumer, computing, and industrial electronics.
FAQ
What is the maximum reverse voltage before breakdown for BZX84C24W-7?
The nominal zener voltage is 24 V with a guaranteed range of 22.8 V to 25.6 V at 5 mA test current. Breakdown occurs sharply within this band; operation below 22.8 V yields negligible reverse current (<0.1 µA at 16.8 V), confirming effective non-conduction until reaching the specified knee.
Can BZX84C24W-7 be used in place of a 24 V Zener in an existing SOT-23 design?
No - BZX84C24W-7 uses SOT-323, which has different pad dimensions and terminal spacing than SOT-23. Direct substitution requires PCB layout revision. The SOT-323 footprint is smaller (2.2 mm × 1.35 mm vs. 2.9 mm × 1.3 mm) and pin 3 is NC, unlike SOT-23's three functional pins.
Does BZX84C24W-7 require derating at elevated ambient temperatures?
Yes - power dissipation must be linearly derated above 25 °C at 1.6 mW/°C, per the 625 K/W thermal resistance. At 85 °C ambient, maximum allowable power drops to 104 mW. Derating follows the curve in Figure 1 of DS30066 Rev. 15-2.
Is the temperature coefficient of BZX84C24W-7 positive or negative, and how does it affect circuit stability?
The temperature coefficient is positive (+18.4 to +22.0 mV/°C), meaning VZ increases with junction temperature. In precision references, this drift must be compensated via resistor ratio selection or system-level calibration - especially critical in wide-temperature-range industrial deployments.
BZX84C24W-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±6%
- Power - Max:
- 200 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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84C24W-7 FAQ
1.How can I place an order for BZX84C24W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C24W-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 BZX84C24W-7 reliable?
The price and inventory of BZX84C24W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C24W-7 is usually 5 days.
3.What payment methods are accepted for BZX84C24W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C24W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C24W-7?
BZX84C24W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C24W-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 BZX84C24W-7?
For technical support, including BZX84C24W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C24W-7 requirements.
6.How does Aetrix verify that BZX84C24W-7 is sourced from the original manufacturer or authorized distributors?
All BZX84C24W-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 BZX84C24W-7 meets industry standards.
7.What is the process for return or replacement of BZX84C24W-7?
All BZX84C24W-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C24W-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 BZX84C24W-7 part is unused and in its original packaging.
Return procedure for BZX84C24W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C24W-7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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MMSZ5245BS-7-F
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