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Nexperia USA Inc. PDZ24BZ
- Part No.:
- PDZ24BZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ24BZ.pdf
- Description:
- DIODE ZENER 24V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:30,000
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Product details
Overview
PDZ24BZ from Nexperia is a single silicon Zener diode designed for low-power voltage regulation in compact 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 0.5 mA, and 0.05 μA maximum reverse leakage at 19 V. It operates within −65 °C to +150 °C and delivers stable reference performance in power supply feedback paths and overvoltage protection circuits.
For engineers reviewing the PDZ24BZ datasheet, PDZ24BZ pinout, PDZ24BZ application, or PDZ24BZ equivalent, this device is selected for precision low-current voltage clamping, board-level ESD-adjacent biasing, and space-constrained 24 V rail stabilization where thermal resistance (Rth(j-a) = 340 K/W) and SOD323 footprint compatibility are critical design constraints.
Technical Context
This Zener diode functions as a two-terminal passive voltage reference, operating in reverse breakdown mode with hard knee characteristics and low dynamic impedance-enabling accurate voltage clamping even at low bias currents (IZ = 0.5 mA). Its temperature coefficient is +20.4 mV/K at 5 mA, indicating positive drift behavior optimized for mid-range Zener voltages.
The device uses planar epitaxial construction on a silicon die housed in an SOD323 (SC-76) package, with cathode marked by a bar on the top surface. Thermal performance is specified for mounting on FR4 PCB with single-sided copper and standard footprint, yielding Rth(j-sp) = 130 K/W to solder point.
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 system rails |
| Differential Resistance rdif | 120 Ω max at IZ = 0.5 mA - ensures minimal voltage shift under varying load current |
| Reverse Leakage IR | 0.05 μA max at VR = 19 V - enables ultra-low standby power loss in always-on bias networks |
| Power Dissipation Ptot | 400 mW at Tamb ≤ 25 °C - supports continuous operation in thermally constrained layouts |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - allows predictable forward conduction during transient polarity reversal |
| Junction Temperature Tj | +150 °C max - permits reliable operation in industrial ambient environments up to 125 °C |
| Package | SOD323 (SC-76) - 1.35 × 1.75 mm footprint compatible with high-density reflow assembly |
Pinout & Package
PDZ24BZ is housed in a 2-pin SOD323 (SC-76) surface-mount plastic package. The cathode is marked by a visible bar on the top surface; polarity must be observed during placement to ensure correct reverse-bias operation.
| 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 current path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance at low current | 120 Ω max at 0.5 mA enables stable regulation in micro-power bias networks |
| Hard breakdown knee | Sharp transition into conduction improves accuracy of voltage limiting without soft saturation |
| ±2 % voltage tolerance | Tight initial calibration reduces need for post-production trimming in reference circuits |
| Ultra-low leakage current | 0.05 μA max at 19 V minimizes error current in high-impedance feedback dividers |
| SOD323 package compatibility | Standardized footprint supports automated pick-and-place and IPC-compliant reflow profiles |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing the reference input of a TL431-based adjustable linear regulator or flyback controller feedback loop. IC Role / Device Role / Timing Role: Provides precise 24 V reference voltage to set output regulation threshold. Use Value: Maintains ±1 % output accuracy across line/load variations due to low rdif and tight VZ tolerance. |
Use Scenario: Protecting microcontroller I/O pins against transient surges on a 24 V sensor interface line. IC Role / Device Role / Timing Role: Shunts excess energy above 24.78 V to ground before damage threshold is reached. Use Value: Limits peak clamping voltage to ≤25.5 V at 100 mA surge, preventing latch-up in 3.3 V logic inputs. |
| Reference Voltage Source | Current Sink Bias |
|
Use Scenario: Generating a stable 24 V reference for analog-to-digital converter (ADC) input scaling in industrial data acquisition. IC Role / Device Role / Timing Role: Supplies fixed voltage to resistive divider network feeding ADC reference channel. Use Value: Delivers <0.5 mV drift over 0–70 °C ambient due to predictable +20.4 mV/K tempco compensation. |
Use Scenario: Establishing constant current for LED biasing in status indicator circuits powered from 24 V bus. IC Role / Device Role / Timing Role: Acts as voltage-controlled current sink via series resistor to maintain LED brightness. Use Value: Enables ±3 % current stability across 10–100 mA range using only one external resistor and no active components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C24 | 500 mW rating, DO-35 through-hole package, ±5 % tolerance, 150 Ω rdif | Requires manual insertion and wave soldering; unsuitable for high-density SMT layouts | Select when legacy through-hole assembly or higher power margin is required |
| MMSZ5242B | SOD-123 package (1.8 × 1.4 mm), 500 mW, ±5 %, 30 Ω rdif at 20 mA | Lower impedance but looser tolerance; requires higher bias current for optimal regulation | Select when tighter dynamic regulation at >5 mA is prioritized over initial voltage accuracy |
Compared with BZX55C24 and MMSZ5242B, PDZ24BZ offers superior voltage accuracy (±2 % vs. ±5 %) and SOD323 footprint efficiency, making it optimal for modern miniaturized designs requiring first-pass calibration without trimming.
Availability
PDZ24BZ is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and IoT sensor nodes requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for PDZ24BZ 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 discrete and logic devices, with leadership in automotive-grade and industrial-standard components.
PDZ24BZ belongs to the PDZ-B series of low-power Zener diodes engineered specifically for precision voltage regulation in space-constrained SMT applications across consumer, industrial, and computing markets.
FAQ
What is the maximum reverse voltage PDZ24BZ can withstand before breakdown?
The PDZ24BZ exhibits a nominal Zener voltage of 23.72–24.78 V at 5 mA test current, with guaranteed breakdown occurring no later than 24.78 V. Its absolute maximum non-repetitive peak reverse voltage is not specified, but continuous operation above 24.78 V will cause increasing reverse current per the V–I curve in Figure 7 of the datasheet.
Can PDZ24BZ be used in series or parallel configurations?
PDZ24BZ is not recommended for parallel use due to mismatched Zener impedances causing current hogging. In series, total voltage equals sum of individual VZ values, but thermal coupling must be ensured to avoid runaway-Nexperia does not characterize or guarantee performance in multi-diode stacks.
How does temperature affect PDZ24BZ's Zener voltage stability?
PDZ24BZ has a positive temperature coefficient of +20.4 mV/K at 5 mA, meaning its Zener voltage increases ~20.4 mV per degree Celsius rise in junction temperature. This behavior is typical for Zeners above 5.6 V and must be factored into high-precision reference designs operating across wide ambient ranges.
Is PDZ24BZ suitable for automotive applications?
No-PDZ24BZ is not AEC-Q200 qualified and lacks automotive-specific testing or qualification. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products like PDZ24BZ are not warranted for use in safety-critical or life-support systems, including automotive ECUs or ADAS subsystems.
PDZ24BZ 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
PDZ24BZ FAQ
1.How can I place an order for PDZ24BZ through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ24BZ 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 PDZ24BZ reliable?
The price and inventory of PDZ24BZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ24BZ is usually 5 days.
3.What payment methods are accepted for PDZ24BZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ24BZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ24BZ?
PDZ24BZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ24BZ 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 PDZ24BZ?
For technical support, including PDZ24BZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ24BZ requirements.
6.How does Aetrix verify that PDZ24BZ is sourced from the original manufacturer or authorized distributors?
All PDZ24BZ 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 PDZ24BZ meets industry standards.
7.What is the process for return or replacement of PDZ24BZ?
All PDZ24BZ units undergo pre-shipment inspection (PSI). If there is an issue with PDZ24BZ, 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 PDZ24BZ part is unused and in its original packaging.
Return procedure for PDZ24BZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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