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Nexperia USA Inc. PDZ2.4B-QX
- Part No.:
- PDZ2.4B-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ2.4B-QX.pdf
- Description:
- DIODE ZENER 2.4V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,435
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Product details
Overview
PDZ2.4B-QX from Nexperia is a single Zener diode in SOD323 (SC-76) package, designed for low-power voltage regulation at 2.4 V nominal working voltage with ±2 % tolerance, 50 Ω max differential resistance at IZ = 5 mA, and 1000 μA reverse current at VR = 1.0 V - used in automotive ECU power rail clamping and sensor biasing circuits.
For engineers reviewing the PDZ2.4B-QX datasheet, PDZ2.4B-QX pinout, PDZ2.4B-QX application, or PDZ2.4B-QX equivalent, this device supports AEC-Q101-compliant designs requiring stable low-voltage reference, low-leakage clamping, and hard breakdown knee behavior under transient conditions.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 2.43–2.63 V at IZ = 5 mA, exhibiting a negative temperature coefficient of −1.6 mV/K and a typical junction-to-solder-point thermal resistance of 130 K/W. Its hard breakdown knee ensures predictable conduction onset without soft turn-on drift.
Designed for surface-mount use on FR4 PCBs with standard footprint, it delivers 400 mW total power dissipation at Tamb ≤ 25 °C and maintains ≤ 1000 μA leakage at VR = 1.0 V, supporting robust overvoltage protection in space-constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.43–2.63 V at IZ = 5 mA - defines precise clamping threshold for 2.4 V rail stabilization |
| Differential Resistance (rdif) | ≤ 1000 Ω at IZ = 0.5 mA - ensures minimal voltage shift under light-load transients |
| Reverse Current (IR) | ≤ 1000 μA at VR = 1.0 V - guarantees low standby power loss in always-on circuits |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - enables reliable anode-cathode polarity verification during test |
| Power Dissipation (Ptot) | 400 mW at Tamb = 25 °C on FR4 PCB - sets maximum continuous clamping energy before thermal derating |
| Thermal Resistance (Rth(j-sp)) | 130 K/W - determines junction temperature rise above solder point under steady-state load |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SOD323 (SC-76), plastic surface-mounted, 2-lead, 1.35 × 1.75 mm body size, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 (A) | Anode | Connected to ground or lower-potential reference; completes reverse-bias path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Hard breakdown knee | Enables sharp, repeatable conduction onset at VZ, critical for accurate voltage limiting in sensor interfaces |
| AEC-Q101 qualification | Validated for automotive under-hood environments including −40 °C to +150 °C operation and mechanical shock |
| Low dynamic impedance at low current | 1000 Ω at IZ = 0.5 mA - maintains tight regulation even in microamp-level bias networks |
| Small SOD323 footprint | 1.35 × 1.75 mm - fits high-density PCB layouts in ADAS camera modules and body control units |
| ±2 % VZ tolerance | Ensures consistent clamping across production lots without post-assembly calibration |
Applications
| Automotive ECU Power Rail Clamping | Sensor Bias Reference Generation |
|---|---|
|
Use Scenario: Protecting 2.4 V supply rails in engine control units from load dump transients up to 40 V. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp excess voltage and shunt surge current to ground. Use Value: Limits rail excursion to ≤2.63 V during 100 µs surges, preventing damage to downstream 2.4 V LDOs and MCU I/O. |
Use Scenario: Providing stable bias voltage for analog pressure sensors in tire pressure monitoring systems (TPMS). IC Role / Device Role / Timing Role: Low-leakage Zener reference establishing fixed 2.4 V node for sensor excitation and ADC reference scaling. Use Value: Delivers <1000 μA leakage at 1.0 V reverse bias, minimizing quiescent current in battery-powered TPMS nodes. |
| USB Port Overvoltage Protection | Industrial PLC Input Signal Conditioning |
|
Use Scenario: Safeguarding USB 2.0 data line receivers against ESD-induced voltage spikes exceeding 3.3 V. IC Role / Device Role / Timing Role: Fast-response Zener clamp placed between D+ and ground to absorb ±8 kV HBM ESD events. Use Value: Hard breakdown knee ensures clamping initiates within nanoseconds, limiting peak voltage to 2.63 V before IC damage occurs. |
Use Scenario: Stabilizing 2.4 V reference for 4–20 mA loop-powered transmitter front-end circuitry. IC Role / Device Role / Timing Role: Precision Zener providing temperature-stable bias for op-amp input stages in harsh industrial ambient. Use Value: −1.6 mV/K temperature coefficient allows predictable drift compensation in 0–70 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B2V4 | Same 2.4 V nominal, ±2 % tolerance, but SOD323 package with higher rdif (1200 Ω @ 5 mA) and no AEC-Q101 qualification | Limited to commercial-grade consumer electronics; not rated for automotive thermal cycling or humidity testing | Select when cost sensitivity outweighs automotive reliability requirements and tighter dynamic impedance is not needed |
| MMSZ4678T1G | 2.4 V nominal, ±5 % tolerance, SOD123 package, 1500 Ω rdif @ 5 mA, AEC-Q101 qualified but larger footprint (2.7 × 1.5 mm) | Acceptable for automotive use but less precise regulation and occupies 2.3× more board area than PDZ2.4B-QX | Choose only if legacy SOD123 layout compatibility is mandatory and ±5 % VZ tolerance is acceptable |
Compared with BZX384-B2V4 and MMSZ4678T1G, PDZ2.4B-QX offers superior regulation precision (±2 % vs. ±5 %), lowest dynamic impedance in its class, smallest footprint, and full AEC-Q101 validation - making it optimal for next-generation automotive and space-constrained industrial designs.
Availability
PDZ2.4B-QX is available at Aetrix Electronics and suitable for automotive ECU protection, sensor biasing, USB port clamping, and industrial 4–20 mA transmitter reference applications requiring stable component supply and AEC-Q101 compliance.
Supply support for PDZ2.4B-QX 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 essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and mobile markets.
PDZ2.4B-QX belongs to the PDZ-B-Q series of AEC-Q101-qualified Zener diodes engineered specifically for automotive voltage regulation and clamping in compact, thermally efficient SOD323 packages.
FAQ
What is the maximum non-repetitive peak reverse current (IZSM) for PDZ2.4B-QX?
The maximum non-repetitive peak reverse current is 8.0 A at tp = 100 µs and Tamb = 25 °C prior to surge. This rating defines the device's ability to absorb short-duration transients such as ISO 7637-2 pulse 1 or ESD events without degradation, provided thermal limits are respected.
Does PDZ2.4B-QX support reflow soldering, and what footprint is recommended?
Yes, PDZ2.4B-QX is qualified for lead-free reflow soldering using the SOD323 footprint shown in Figure 9 of the datasheet: 0.6 mm pad width × 1.65 mm length, 0.5 mm solder mask opening, and 0.95 mm pad pitch. This ensures reliable wetting and mechanical integrity on FR4 boards.
How does the temperature coefficient affect regulation accuracy over automotive temperature ranges?
With a typical temperature coefficient of −1.6 mV/K at IZ = 5 mA, PDZ2.4B-QX exhibits predictable downward drift: VZ decreases ~0.16 V from −40 °C to +125 °C. This behavior is stable and repeatable, enabling accurate compensation in closed-loop bias networks.
Can PDZ2.4B-QX be used in series or parallel configurations for higher power handling?
No - Zener diodes must not be paralleled due to mismatched VZ causing current hogging; series connection requires matched units and balancing resistors. For >400 mW dissipation, use a dedicated TVS or active clamp circuit instead of stacking PDZ2.4B-QX devices.
PDZ2.4B-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PDZ-B-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.4 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PDZ2.4B-QX FAQ
1.How can I place an order for PDZ2.4B-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ2.4B-QX 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 PDZ2.4B-QX reliable?
The price and inventory of PDZ2.4B-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ2.4B-QX is usually 5 days.
3.What payment methods are accepted for PDZ2.4B-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ2.4B-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ2.4B-QX?
PDZ2.4B-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ2.4B-QX 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 PDZ2.4B-QX?
For technical support, including PDZ2.4B-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ2.4B-QX requirements.
6.How does Aetrix verify that PDZ2.4B-QX is sourced from the original manufacturer or authorized distributors?
All PDZ2.4B-QX 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 PDZ2.4B-QX meets industry standards.
7.What is the process for return or replacement of PDZ2.4B-QX?
All PDZ2.4B-QX units undergo pre-shipment inspection (PSI). If there is an issue with PDZ2.4B-QX, 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 PDZ2.4B-QX part is unused and in its original packaging.
Return procedure for PDZ2.4B-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ2.4B-QX Tags
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