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Nexperia USA Inc. PDZ24BF
- Part No.:
- PDZ24BF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ24BF.pdf
- Description:
- DIODE ZENER 24V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,900
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Product details
Overview
PDZ24BF from Nexperia is a single silicon Zener diode designed for low-power voltage regulation in space-constrained SMD applications, with a nominal Zener voltage of 24 V (23.72–24.78 V at IZ = 5 mA), ±2 % tolerance, 120 Ω maximum differential resistance at 5 mA, 30 µA max reverse current at 19 V, and 400 mW total power dissipation on FR4 PCB.
For engineers reviewing the PDZ24BF datasheet, PDZ24BF pinout, PDZ24BF application, or PDZ24BF equivalent, this device is selected for precision clamping, reference biasing, and overvoltage protection in portable power rails, sensor signal conditioning, and low-current analog subsystems where thermal resistance (Rth(j-a) = 340 K/W) and compact SOD323 packaging are critical.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under controlled current conditions. Its hard breakdown knee and low leakage (≤30 µA at VR = 19 V) support reliable regulation even at sub-mA bias currents.
Thermal performance is defined for mounting on standard FR4 PCB with single-sided copper: junction-to-ambient thermal resistance is 340 K/W, and junction-to-solder-point is 130 K/W - enabling predictable derating above 25 °C ambient per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 23.72–24.78 V at IZ = 5 mA - defines precise clamping threshold for 24 V rail stabilization |
| Differential Resistance rdif | ≤120 Ω at IZ = 5 mA - ensures minimal voltage shift under load variation |
| Reverse Current IR | ≤30 µA at VR = 19 V - enables low-quiescent-power standby operation |
| Power Dissipation Ptot | 400 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous DC/average power handling |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA - supports use as low-drop rectifier or ESD path in forward bias |
| Temperature Coefficient SZ | +20.4 mV/K at IZ = 5 mA - quantifies positive drift rate for thermal compensation design |
| Junction Temperature | −65 to +150 °C - specifies operational and storage limits for industrial environments |
Pinout & Package
PDZ24BF is housed in a SOD323 (SC-76) surface-mount plastic package measuring 1.8 × 1.35 × 0.95 mm, with cathode identified by a marking bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes bias path for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 120 Ω max at 5 mA - improves regulation accuracy under varying load currents |
| Hard breakdown knee | Sharp transition into conduction - reduces ambiguity in turn-on behavior for precision references |
| Small footprint | SOD323 package (1.8 × 1.35 mm) - enables high-density layout in portable and wearable electronics |
| Tight voltage tolerance | ±2 % at IZ = 5 mA - eliminates need for post-assembly trimming in most voltage-reference designs |
| Low leakage current | 30 µA max at 19 V - minimizes parasitic loading in high-impedance bias networks |
Applications
| Portable Power Rail Clamping | Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 24 V supply lines in battery-powered instrumentation from transient overvoltage events. IC Role / Device Role / Timing Role: Zener clamping element placed between rail and ground to shunt excess energy above 24.8 V. Use Value: Limits peak voltage to ≤24.78 V with <30 µA standby draw, preserving system uptime without active supervision. |
Use Scenario: Providing stable 24 V reference for bridge-based pressure transducers in HVAC control modules. IC Role / Device Role / Timing Role: Passive voltage reference source for excitation circuitry requiring low-drift, low-noise bias. Use Value: Delivers ±2 % initial accuracy and +20.4 mV/K temperature coefficient - enabling simple linear compensation. |
| Microcontroller I/O Protection | Industrial Analog Input Scaling |
Use Scenario: Safeguarding 3.3 V or 5 V MCU GPIO pins against accidental 24 V miswiring in field-deployed controllers. IC Role / Device Role / Timing Role: Reverse-biased Zener connected between I/O line and ground to clamp fault voltages. Use Value: Withstands non-repetitive 1.3 A surge (tp = 100 µs), limiting pin stress while drawing only 30 µA during normal operation. |
Use Scenario: Scaling 0–24 V industrial sensor outputs to 0–3.3 V ADC input range using resistive divider with Zener reference. IC Role / Device Role / Timing Role: Stable 24 V reference node for ratio-metric divider calibration and offset nulling. Use Value: Maintains regulation within 120 Ω dynamic impedance, ensuring divider ratio stability across temperature and load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C24 | Same 24 V nominal Zener, but ±5 % tolerance and higher rdif (≤200 Ω); SOT23 package (larger than SOD323) | Less precise regulation; requires larger PCB area | Select when cost sensitivity outweighs size and tolerance requirements |
| MMSZ4686 | 24 V nominal, ±5 % tolerance, 200 mW Ptot, SOD123 package (2.7 × 1.6 mm) | Lower power rating and looser tolerance; unsuitable for high-stability references | Choose only for non-critical clamping where thermal margin is ample |
Compared with BZX84-C24 and MMSZ4686, PDZ24BF offers tighter ±2 % tolerance, lower 120 Ω dynamic impedance, and smallest SOD323 footprint - making it optimal for miniaturized, high-accuracy 24 V regulation where board space and regulation fidelity are constrained.
Availability
PDZ24BF is available at Aetrix Electronics and suitable for portable power rail clamping, sensor signal conditioning, microcontroller I/O protection, and industrial analog input scaling requiring stable component supply and consistent parametric performance across production lots.
Supply support for PDZ24BF 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET devices, headquartered in Nijmegen, Netherlands.
The PDZ-B series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for low-power voltage regulation and overvoltage protection in consumer, industrial, and computing applications demanding small size and tight tolerances.
FAQ
What is the maximum non-repetitive peak reverse current for PDZ24BF?
The maximum non-repetitive peak reverse current (IZSM) is 1.3 A, tested at tp = 100 µs, square wave, with ambient temperature at 25 °C prior to surge. This rating supports transient overvoltage suppression without permanent degradation when used within specified thermal limits.
Can PDZ24BF be used in forward bias as a regular diode?
Yes - PDZ24BF exhibits a forward voltage of ≤0.9 V at 10 mA and ≤1.1 V at 100 mA, making it suitable for low-current rectification or ESD protection paths. Its 200 mA continuous forward current rating allows use in basic signal-level switching or polarity protection circuits.
How does thermal derating affect PDZ24BF's power handling above 25 °C?
Per Figure 1, PDZ24BF's power dissipation must be linearly reduced above 25 °C ambient: full 400 mW is allowed up to 25 °C, then decreases to zero at ~150 °C. On standard FR4 PCB, this yields ~2.35 mW/°C derating slope - critical for sustained operation in enclosed enclosures or near heat sources.
Is PDZ24BF automotive-qualified?
No - PDZ24BF is not automotive-qualified. The datasheet explicitly states that unless otherwise indicated, Nexperia products like PDZ24BF are not tested or warranted for automotive use, including AEC-Q101 stress testing or extended temperature operation beyond −65 °C to +150 °C.
PDZ24BF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PDZ-B
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 19 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PDZ24BF FAQ
1.How can I place an order for PDZ24BF through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ24BF 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 PDZ24BF reliable?
The price and inventory of PDZ24BF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ24BF is usually 5 days.
3.What payment methods are accepted for PDZ24BF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ24BF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ24BF?
PDZ24BF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ24BF 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 PDZ24BF?
For technical support, including PDZ24BF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ24BF requirements.
6.How does Aetrix verify that PDZ24BF is sourced from the original manufacturer or authorized distributors?
All PDZ24BF 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 PDZ24BF meets industry standards.
7.What is the process for return or replacement of PDZ24BF?
All PDZ24BF units undergo pre-shipment inspection (PSI). If there is an issue with PDZ24BF, 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 PDZ24BF part is unused and in its original packaging.
Return procedure for PDZ24BF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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