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Nexperia USA Inc. PZU3.9B1A,115
- Part No.:
- PZU3.9B1A,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PZU3.9B1A,115.pdf
- Description:
- DIODE ZENER 3.9V 320MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,618
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Product details
Overview
PZU3.9B1A,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.9 V nominal working voltage at 5 mA, with 90 Ω maximum differential resistance, 3 µA reverse current at 0.5 mA test condition, and -2.5 mV/K temperature coefficient. It delivers stable reference voltage in low-power analog circuits, power supply feedback loops, and overvoltage protection stages.
For engineers reviewing the PZU3.9B1A,115 datasheet, PZU3.9B1A,115 pinout, PZU3.9B1A,115 application, or PZU3.9B1A,115 equivalent, this device is selected for precision voltage clamping where tight tolerance, low leakage, and hard breakdown knee are required in space-constrained SMT designs.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals under varying load and temperature conditions. Its design emphasizes low dynamic impedance (≤90 Ω at IZ = 5 mA) and controlled temperature coefficient (-2.5 mV/K), enabling accurate regulation in feedback networks.
The device features a hard breakdown knee and low leakage current (3 µA at IZ = 0.5 mA), supporting clean voltage clamping without significant soft turn-on behavior. It is optimized for surface-mounted applications on FR4 PCBs with standard SOD323 footprint and tin-plated copper layers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 3.9 V at IZ = 5 mA - defines precise regulation point for feedback or reference circuits |
| Tolerance | ±2 % (B1 series) - ensures tight voltage accuracy critical for precision analog systems |
| Differential Resistance (rdif) | ≤90 Ω at IZ = 5 mA - minimizes output voltage variation under load changes |
| Reverse Current (IR) | 3 µA at VR = 3.0 V - enables low-power standby operation and minimal quiescent loss |
| Temperature Coefficient (SZ) | -2.5 mV/K - provides predictable, linear drift for thermal compensation design |
| Total Power Dissipation (Ptot) | 320 mW at Tamb ≤ 25 °C - supports continuous operation in compact PCB layouts |
| Package | SOD323 (SC-76) - 1.7 mm × 1.25 mm × 0.95 mm surface-mount outline compatible with standard reflow processes |
Pinout & Package
SOD323 (SC-76) plastic surface-mount package with 2 leads, 1.3 mm pitch, and cathode marked by a bar on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode | Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Hard breakdown knee | Enables sharp, predictable turn-on for reliable voltage clamping without soft saturation |
| Low dynamic impedance | ≤90 Ω at 5 mA ensures minimal regulation error during transient load shifts |
| Low reverse leakage | 3 µA at 3.0 V reduces standby power loss in battery-sensitive applications |
| ±2 % voltage tolerance | Supports high-accuracy reference generation without post-manufacturing trimming |
| Thermal stability | -2.5 mV/K coefficient allows predictable drift modeling in temperature-varying environments |
Applications
| Power Supply Feedback | Overvoltage Protection |
|---|---|
|
Use Scenario: Regulating output voltage in isolated DC-DC converters using optocoupler feedback loop. IC Role / Device Role / Timing Role: Provides stable 3.9 V reference to TL431-like shunt regulator IC input. Use Value: Tight ±2 % tolerance ensures ±1 % output regulation accuracy across line/load/temperature. |
Use Scenario: Clamping surge transients on 3.3 V I/O lines in industrial microcontroller interfaces. IC Role / Device Role / Timing Role: Acts as passive voltage clamp between signal line and ground. Use Value: Hard breakdown knee and 90 Ω rdif limit clamped voltage to ≤4.2 V during 100 µs surges. |
| Reference Voltage Source | Signal Level Shifting |
|
Use Scenario: Generating precision bias voltage for op-amp input stages in sensor signal conditioning. IC Role / Device Role / Timing Role: Supplies stable 3.9 V reference to resistor-divider network feeding op-amp non-inverting input. Use Value: Low 3 µA leakage prevents loading error in high-impedance divider configurations. |
Use Scenario: Translating 5 V logic signals to 3.3 V domain using simple Zener clamp topology. IC Role / Device Role / Timing Role: Limits high-side voltage swing to 3.9 V + VF ≈ 5.0 V, protecting downstream 3.3 V receivers. Use Value: Fast response and low capacitance (<370 pF) preserve signal edge integrity up to 10 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B3V9,115 | Same SOD323 package, ±2 % tolerance, but higher rdif (100 Ω vs. 90 Ω) and higher IR (5 µA vs. 3 µA) | Less suitable for ultra-low-leakage feedback paths; acceptable in general-purpose clamping | Select when cost sensitivity outweighs marginal leakage or impedance advantage |
| MMSZ4685T1G | SOD-123 package (larger), ±5 % tolerance, 100 Ω rdif, 5 µA IR, same 3.9 V nominal rating | Requires larger PCB area; looser tolerance limits use in precision references | Choose only if legacy SOD-123 footprint compatibility is mandatory |
Compared with BZX384-B3V9,115 and MMSZ4685T1G, PZU3.9B1A,115 offers the lowest combination of differential resistance and reverse leakage in the SOD323 footprint, making it optimal for high-accuracy, low-power regulation where board space is constrained.
Availability
PZU3.9B1A,115 is available at Aetrix Electronics and suitable for power supply feedback loops, overvoltage protection circuits, and precision reference voltage generation requiring stable component supply and consistent parametric performance across production batches.
Supply support for PZU3.9B1A,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 global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.
The PZUxBA series is designed specifically for general-purpose voltage regulation in consumer, industrial, and communications equipment where small size, tight tolerance, and stable thermal behavior are essential.
FAQ
What is the maximum continuous reverse current for PZU3.9B1A,115?
The device has no specified maximum continuous reverse current; instead, it is rated for total power dissipation of 320 mW at Tamb ≤ 25 °C. At 3.9 V, this corresponds to a maximum steady-state Zener current of approximately 82 mA, assuming full power is allocated to reverse conduction.
Does PZU3.9B1A,115 support reflow soldering per JEDEC J-STD-020?
Yes - the SOD323 package is qualified for standard lead-free reflow profiles. The recommended footprint matches Nexperia's Figure 10, with 0.5 mm solder land width, 0.6 mm solder resist opening, and 1.35 mm center-to-center pitch.
How does the -2.5 mV/K temperature coefficient affect regulation accuracy over temperature?
Over a 100 °C range (−40 °C to +60 °C), the Zener voltage shifts by approximately ±250 mV - a ±6.4 % deviation from 3.9 V. This must be accounted for in applications requiring better than ±1 % accuracy across temperature; external compensation may be needed.
Can PZU3.9B1A,115 replace older PZU3.9B,115 in existing designs?
Yes - PZU3.9B1A,115 supersedes PZU3.9B,115 with improved tolerance (±2 % vs. ±5 %) and identical package, pinout, and thermal characteristics. No layout or schematic changes are required, and performance is strictly enhanced.
PZU3.9B1A,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±2%
- Power - Max:
- 320 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:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PZU3.9B1A,115 FAQ
1.How can I place an order for PZU3.9B1A,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU3.9B1A,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 PZU3.9B1A,115 reliable?
The price and inventory of PZU3.9B1A,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU3.9B1A,115 is usually 5 days.
3.What payment methods are accepted for PZU3.9B1A,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU3.9B1A,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU3.9B1A,115?
PZU3.9B1A,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU3.9B1A,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 PZU3.9B1A,115?
For technical support, including PZU3.9B1A,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU3.9B1A,115 requirements.
6.How does Aetrix verify that PZU3.9B1A,115 is sourced from the original manufacturer or authorized distributors?
All PZU3.9B1A,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 PZU3.9B1A,115 meets industry standards.
7.What is the process for return or replacement of PZU3.9B1A,115?
All PZU3.9B1A,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU3.9B1A,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 PZU3.9B1A,115 part is unused and in its original packaging.
Return procedure for PZU3.9B1A,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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