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Nexperia USA Inc. PDZ4.3B,115
- Part No.:
- PDZ4.3B,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PDZ4.3B,115.pdf
- Description:
- DIODE ZENER 4.3V 400MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:10,413
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Product details
Overview
PDZ4.3B,115 from Nexperia is a single silicon Zener diode optimized for low-power voltage regulation in space-constrained SMD designs, with a nominal Zener voltage of 4.3 V (4.17–4.48 V at IZ = 5 mA), ±2 % tolerance, 600 Ω dynamic impedance at 1 mA, and 3 µA reverse leakage at 1 V. It operates in general-purpose clamping and reference circuits on consumer, industrial, and communication PCBs.
For engineers reviewing the PDZ4.3B,115 datasheet, PDZ4.3B,115 pinout, PDZ4.3B,115 application, or PDZ4.3B,115 equivalent, this device is selected for precision low-current voltage stabilization where thermal resistance (Rth(j-sp) = 130 K/W), compact SOD323 footprint, and hard breakdown knee are critical design factors.
Technical Context
This Zener diode functions as a two-terminal shunt voltage regulator, maintaining stable output voltage across load variations by conducting reverse current above its specified breakdown threshold. Its hard breakdown knee and low leakage (≤3 µA at VR = 1 V) ensure predictable turn-on behavior in biasing and protection circuits.
Designed for surface-mount assembly on FR4 PCBs with standard solder land patterns, it delivers 400 mW total power dissipation at Tamb ≤ 25 °C and derates linearly above that temperature, with maximum junction temperature rated at +150 °C and storage range from −65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 4.17–4.48 V at IZ = 5 mA - defines precise regulation point for low-voltage reference circuits |
| Dynamic Impedance rdif | 600 Ω at IZ = 1 mA - determines voltage stability under small-signal load transients |
| Reverse Leakage IR | ≤3 µA at VR = 1 V - ensures minimal quiescent current in standby or high-impedance bias networks |
| Power Dissipation Ptot | 400 mW at Tamb = 25 °C - sets maximum continuous power handling on standard FR4 PCB |
| Thermal Resistance Rth(j-sp) | 130 K/W - quantifies junction-to-solder-point heat transfer efficiency for thermal design margining |
| Forward Voltage VF | 0.9 V at IF = 10 mA - enables use as forward-biased clamp or ESD path when polarity reversed |
Pinout & Package
PDZ4.3B,115 is housed in a SOD323 (SC-76) plastic surface-mount 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 rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| Hard breakdown knee | Enables sharp, repeatable conduction onset for reliable overvoltage clamping without soft turn-on drift |
| Low dynamic impedance at low current | 600 Ω @ 1 mA supports stable regulation in micro-power bias networks and sensor excitation circuits |
| Small SOD323 footprint | 1.8 × 1.35 mm outline allows placement in dense layouts where board area is constrained |
| ±2 % Zener voltage tolerance | Reduces need for post-production trimming in factory-set reference applications |
Applications
| Microcontroller Power Rail Clamp | Op-Amp Reference Biasing |
|---|---|
Use Scenario: Clamping 3.3 V or 5 V supply rails against transient spikes in embedded MCU subsystems. IC Role / Device Role / Timing Role: Shunt Zener element placed between rail and ground to divert surge current above regulation threshold. Use Value: Prevents rail overvoltage beyond 4.48 V while drawing <3 µA at nominal 3.3 V, minimizing standby loss. |
Use Scenario: Providing stable bias voltage to op-amp input stages in precision analog front-ends. IC Role / Device Role / Timing Role: Low-noise DC reference source for amplifier offset nulling or gain-setting networks. Use Value: Delivers 4.3 V reference with <600 Ω dynamic impedance, ensuring <1 mV output shift under 10 µA load variation. |
| USB Interface ESD Protection | IoT Sensor Signal Conditioning |
Use Scenario: Secondary clamping stage downstream of TVS diodes on USB D+/D− lines. IC Role / Device Role / Timing Role: Low-leakage shunt limiter absorbing residual energy after primary transient suppression. Use Value: Maintains <3 µA leakage at 3.6 V, preserving signal integrity and bus termination accuracy. |
Use Scenario: Setting bias point for thermistor or photodiode amplifiers in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Precision voltage reference for ADC reference dividers or current-source control. Use Value: Enables 0.5 % full-scale accuracy in 12-bit sensor readings using its ±2 % VZ tolerance and low tempco (−2.5 mV/K). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V3,115 | Same SOD323 package, identical 4.3 V nominal rating, but higher typical leakage (5 µA @ 1 V) and softer knee | Suitable for less critical regulation where tighter leakage isn't required | Select if cost sensitivity outweighs need for hard knee and ultra-low IR |
| MMSZ4685T1G | Higher power rating (500 mW), larger SOD-123 package, 4.3 V nominal but ±5 % tolerance | Better suited for higher-current clamping where board space permits larger footprint | Choose when >400 mW dissipation or looser VZ tolerance is acceptable |
Compared with BZX384-B4V3,115 and MMSZ4685T1G, PDZ4.3B,115 offers superior low-current regulation fidelity due to its hard knee and 3 µA leakage, making it optimal for precision biasing in low-power analog and digital systems where SOD323 size is mandatory.
Availability
PDZ4.3B,115 is available at Aetrix Electronics and suitable for microcontroller power rail clamp, op-amp reference biasing, USB interface ESD protection, and IoT sensor signal conditioning requiring stable component supply and consistent parametric performance.
Supply support for PDZ4.3B,115 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 leading global semiconductor manufacturer specializing in high-performance logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.
The PDZ-B series targets cost-sensitive, space-constrained voltage regulation needs in consumer, industrial, and communications equipment, emphasizing tight tolerance, low leakage, and robust SMD manufacturability.
FAQ
What is the maximum reverse current the PDZ4.3B,115 can handle in non-repetitive surge conditions?
The PDZ4.3B,115 supports a non-repetitive peak reverse current (IZSM) of 8.0 A at tp = 100 µs and Tamb = 25 °C, as specified in Table 5 of the datasheet. This rating applies only to short-duration transients and must be paired with appropriate series limiting resistance to avoid exceeding the 400 mW steady-state power limit.
How does the temperature coefficient affect regulation accuracy over operating temperature?
At IZ = 5 mA, PDZ4.3B,115 has a temperature coefficient (SZ) of −2.5 mV/K, meaning its Zener voltage decreases by approximately 2.5 mV per degree Celsius rise. Over a 0–70 °C ambient range, this results in a total drift of ~175 mV, which must be accounted for in precision reference designs.
Can PDZ4.3B,115 be used in forward-bias applications?
Yes - its forward voltage is 0.9 V at IF = 10 mA and 1.1 V at IF = 100 mA, making it usable as a low-drop rectifier or ESD shunt in forward conduction mode. However, its primary design intent and characterization are for reverse-bias Zener operation.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes - Nexperia specifies compatibility with JEDEC J-STD-020-compliant reflow profiles. Figure 9 provides the recommended solder land pattern (0.6 mm pad width, 0.5 mm spacing), and the device is qualified for peak temperatures up to 260 °C for 10 seconds during lead-free reflow.
PDZ4.3B,115 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):
- 4.3 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 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
PDZ4.3B,115 FAQ
1.How can I place an order for PDZ4.3B,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDZ4.3B,115 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 PDZ4.3B,115 reliable?
The price and inventory of PDZ4.3B,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDZ4.3B,115 is usually 5 days.
3.What payment methods are accepted for PDZ4.3B,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDZ4.3B,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDZ4.3B,115?
PDZ4.3B,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDZ4.3B,115 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 PDZ4.3B,115?
For technical support, including PDZ4.3B,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDZ4.3B,115 requirements.
6.How does Aetrix verify that PDZ4.3B,115 is sourced from the original manufacturer or authorized distributors?
All PDZ4.3B,115 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 PDZ4.3B,115 meets industry standards.
7.What is the process for return or replacement of PDZ4.3B,115?
All PDZ4.3B,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDZ4.3B,115, 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 PDZ4.3B,115 part is unused and in its original packaging.
Return procedure for PDZ4.3B,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDZ4.3B,115 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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SMAZ12-13-F
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