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Diodes Incorporated BZX84C24-7
- Part No.:
- BZX84C24-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C24-7.pdf
- Description:
- DIODE ZENER 24V 300MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,793
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Product details
Overview
BZX84C24-7 from Diodes Incorporated is a 350mW surface-mount Zener diode with a nominal zener voltage of 24V (22.8–25.6V range at 5mA test current), 70Ω maximum zener impedance at 5mA, and 0.1µA maximum reverse leakage at 18.4V. It uses planar die construction in SOT23 package and is AEC-Q101 qualified for automotive-grade reliability. It provides precise voltage regulation in low-power supply rail clamping and reference circuits.
For engineers reviewing the BZX84C24-7 datasheet, BZX84C24-7 pinout, BZX84C24-7 application, or BZX84C24-7 equivalent, key selection criteria include zener voltage tolerance, dynamic impedance at rated test current, thermal resistance (357°C/W), reverse leakage at VR, and AEC-Q101 qualification status for automotive use.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load or line conditions. Its 24V nominal regulation is specified at 5mA test current with ±4.2% tolerance (22.8–25.6V), and it exhibits a negative temperature coefficient of −3.5mV/°C - critical for thermal drift compensation in precision references.
The device delivers 350mW power dissipation when leads are held at ambient temperature, derating linearly above +25°C per Figure 1. Its SOT23 package enables high-density PCB layouts and compatibility with automated pick-and-place assembly, while matte tin-plated alloy 42 leads ensure reliable solderability per MIL-STD-202.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24V nominal (22.8–25.6V min/max) at 5mA - defines regulated output voltage under standard bias |
| Power Dissipation (PD) | 350mW at TA = +25°C with leads at ambient - sets maximum continuous power handling before thermal shutdown |
| Zener Impedance (ZZT) | 70Ω max at 5mA - determines AC regulation stiffness and ripple rejection capability |
| Reverse Leakage (IR) | 0.1µA max at VR = 18.4V - ensures minimal quiescent current in standby or high-impedance bias networks |
| Thermal Resistance (RθJA) | 357°C/W - quantifies junction-to-ambient temperature rise per watt; critical for thermal design margin |
| Temperature Coefficient | −3.5mV/°C - enables predictable voltage drift compensation in temperature-sensitive references |
| Package | SOT23 - 3-pin surface-mount outline with 2.4mm × 1.3mm footprint and 1.1mm height for space-constrained designs |
Pinout & Package
Package: SOT23 - molded plastic case, UL 94V-0 flammability rating, moisture sensitivity level 1 per J-STD-020, 0.008g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground | Connected to circuit ground or lower-potential node during Zener operation; polarity must match schematic symbol |
| Cathode (Pin 2) | Zener regulation output / voltage clamp node | Connected to regulated rail or protected input; carries full reverse current during breakdown |
| No Connect (Pin 3) | Internal die attach pad (non-functional) | Electrically isolated; may be left floating or tied to ground for mechanical stability only - no electrical role |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight VZ tolerance control and stable long-term parametric drift over temperature and life |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control units and body electronics |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900ppm Br, <900ppm Cl, <1000ppm Sb - supports green manufacturing requirements |
| Automated assembly optimized | Matte tin finish on Alloy 42 leadframe ensures consistent solder wetting and zero defects in reflow processes |
| Low thermal resistance | 357°C/W RθJA allows higher power operation on standard FR-4 without heatsinking in compact layouts |
Applications
| Power Supply Rail Clamp | Overvoltage Protection Circuit |
|---|---|
|
Use Scenario: Clamping 24V DC input rails against transient surges in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy to ground when input exceeds 25.6V. Use Value: Limits peak rail voltage to ≤25.6V with 70Ω dynamic impedance, preventing damage to downstream 24V-rated logic and analog ICs. |
Use Scenario: Protecting microcontroller ADC inputs from ESD-induced voltage spikes in automotive cabin sensors. IC Role / Device Role / Timing Role: Low-leakage (0.1µA @ 18.4V) voltage clamp placed between sensor signal line and ground. Use Value: Activates at 22.8V to divert transients while adding negligible offset error (<1mV) to 0–5V measurement range. |
| Reference Voltage Source | Temperature-Compensated Bias Network |
|
Use Scenario: Generating stable 24V reference for precision current-sense amplifier calibration in battery management systems. IC Role / Device Role / Timing Role: Zener diode biased at 5mA to deliver fixed 24V reference with −3.5mV/°C TC. Use Value: Enables direct temperature compensation using matched NTC thermistors or complementary bipolar pairs due to known, linear TC. |
Use Scenario: Setting bias point for high-side N-channel MOSFET gate drivers in 24V motor control H-bridges. IC Role / Device Role / Timing Role: Zener referenced to source node to establish gate-source voltage threshold independent of supply variation. Use Value: Maintains 24V regulation across −40°C to +125°C with <±0.5% total drift when combined with TC-matched resistors. |
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 |
|---|---|---|---|
| MMBZ5242BS-7-F | 24V nominal, 200mW PD, 30Ω ZZT @ 10mA, SOT-323 package | Lower power rating and smaller footprint; not AEC-Q101 qualified | Select when board space is constrained and automotive qualification is unnecessary |
| BZX84-C24,115 | Same 24V spec, 350mW PD, but in SOT23-3 with different marking and packaging (10k/reel) | Identical electrical performance; differs only in tape-and-reel quantity and date code format | Select for volume procurement where 10,000-unit reels reduce assembly cost per unit |
Compared with MMBZ5242BS-7-F, BZX84C24-7 offers 75% higher power handling and automotive qualification; compared with BZX84-C24,115, it provides identical regulation performance with optimized 3,000-unit reel logistics for prototyping and mid-volume production.
Availability
BZX84C24-7 is available at Aetrix Electronics and suitable for industrial power supply clamping, automotive overvoltage protection, and precision voltage reference applications requiring stable component supply and AEC-Q101 compliance.
Supply support for BZX84C24-7 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' standard Zener diode product line, engineered for high-reliability voltage regulation in automotive, industrial, and consumer power management systems.
FAQ
What is the maximum reverse voltage (VR) at which BZX84C24-7 guarantees ≤0.1µA leakage?
The datasheet specifies 0.1µA maximum reverse current at VR = 18.4V. This value is measured under steady-state DC conditions at +25°C and defines the upper limit of the sub-breakdown region where the device behaves as a high-impedance voltage reference rather than an active clamp.
Can BZX84C24-7 be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients and mismatched VZ tolerances, causing current hogging and thermal runaway when paralleled. For >350mW operation, use a single higher-power Zener (e.g., 1N5354B) or active regulation with a pass transistor.
Is the SOT23 pinout of BZX84C24-7 compatible with JEDEC TO-236AB standard?
Yes - the SOT23 package conforms to JEDEC TO-236AB mechanical dimensions and pin assignment: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = NC (die attach pad). Footprint compatibility is confirmed by Diodes' recommended pad layout (X = 0.8mm, Y = 0.9mm, C = 2.0mm).
Does the −3.5mV/°C temperature coefficient apply across the full operating range?
Yes - the coefficient is characterized from −65°C to +150°C and remains linear within ±5% deviation. At +125°C, the zener voltage shifts by approximately −350mV from its +25°C value, enabling predictable compensation in wide-temperature designs.
BZX84C24-7 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:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±6%
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84C24-7 FAQ
1.How can I place an order for BZX84C24-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C24-7 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 BZX84C24-7 reliable?
The price and inventory of BZX84C24-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C24-7 is usually 5 days.
3.What payment methods are accepted for BZX84C24-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C24-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C24-7?
BZX84C24-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C24-7 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 BZX84C24-7?
For technical support, including BZX84C24-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C24-7 requirements.
6.How does Aetrix verify that BZX84C24-7 is sourced from the original manufacturer or authorized distributors?
All BZX84C24-7 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 BZX84C24-7 meets industry standards.
7.What is the process for return or replacement of BZX84C24-7?
All BZX84C24-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C24-7, 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 BZX84C24-7 part is unused and in its original packaging.
Return procedure for BZX84C24-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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