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Nexperia USA Inc. PZU3.9B2A,115
- Part No.:
- PZU3.9B2A,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PZU3.9B2A,115.pdf
- Description:
- DIODE ZENER 3.9V 320MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,295
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Product details
Overview
PZU3.9B2A,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.9 V nominal breakdown voltage at 5 mA, with 90 Ω maximum differential resistance and 3 nA reverse current at 0.5 mA, used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the PZU3.9B2A,115 datasheet, PZU3.9B2A,115 pinout, PZU3.9B2A,115 application, or PZU3.9B2A,115 equivalent, key selection criteria include tight voltage tolerance, low dynamic impedance at regulation current, thermal stability across -55 °C to +150 °C, and compatibility with standard FR4 PCB reflow soldering footprints.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage under varying load and temperature conditions. Its ±2 % tolerance (B2 series) ensures tighter regulation than ±5 % variants, and its 90 Ω differential resistance at IZ = 5 mA supports low-output-impedance reference generation.
The device features a hard breakdown knee, very low leakage (3 nA at 0.5 mA), and intentional minor leakage optimization per AN90031 for improved noise performance and fast transient response in feedback loops and clamp circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.9 V at IZ = 5 mA - defines precise regulation point for biasing and reference circuits |
| Voltage Tolerance | ±2 % (B2 series) - enables high-accuracy voltage setting without post-calibration |
| Differential Resistance | ≤90 Ω at IZ = 5 mA - ensures minimal output voltage shift under load variation |
| Reverse Current | 3 nA at VR = 0.5 mA - guarantees ultra-low standby power loss in always-on circuits |
| Total Power Dissipation | 320 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous DC power handling capability |
| Non-repetitive Peak Power | 40 W at tp = 100 µs - supports transient surge clamping without failure |
| Junction Temperature | 150 °C max - allows operation in industrial and automotive under-hood environments |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package measuring 1.7 mm × 1.25 mm × 0.95 mm with 1.3 mm lead pitch and cathode-marked bar.
| 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; forms reverse-bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hard breakdown knee | Enables sharp, predictable turn-on for reliable clamping and reference stability |
| Very low leakage current | 3 nA at 0.5 mA reverse bias minimizes quiescent current in battery-powered systems |
| Optimized noise performance | Intentional minor leakage rise per AN90031 reduces broadband noise in sensitive analog references |
| Thermal resistance (j-a) | 390 K/W in free air - supports thermal-aware layout without heatsinking in space-constrained designs |
| Solder-compatible footprint | Standard SOD323 reflow pad layout (Fig. 10) ensures manufacturability on automated assembly lines |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 3.9 V reference for ADC biasing and op-amp level-shifting in portable instrumentation. IC Role / Device Role / Timing Role: Zener diode functions as two-terminal shunt voltage reference, absorbing excess current to hold node voltage constant. Use Value: ±2 % tolerance and 90 Ω dynamic impedance ensure <±10 mV drift over load changes, critical for 12-bit measurement accuracy. |
Use Scenario: Protecting microcontroller I/O pins from ESD-induced transients in industrial sensor interfaces. IC Role / Device Role / Timing Role: Acts as fast-acting shunt clamp, diverting surge current when voltage exceeds 3.9 V + Vf. Use Value: 40 W non-repetitive peak power rating handles 100 µs surges up to 10 A without degradation. |
| Low-Power Bias Network | Temperature-Stable Oscillator Trim |
Use Scenario: Generating fixed bias points for discrete transistor amplifiers in battery-operated audio preamps. IC Role / Device Role / Timing Role: Provides low-current, low-noise DC bias voltage independent of supply fluctuations. Use Value: 3 nA reverse leakage prevents measurable loading on high-impedance bias nodes, preserving gain stability. |
Use Scenario: Compensating crystal oscillator frequency drift via voltage-controlled trim in real-time clock modules. IC Role / Device Role / Timing Role: Supplies stable 3.9 V reference to varactor diode control line for fine-tuning. Use Value: Temperature coefficient of −2.5 mV/K (typical for 3.9 V devices) enables predictable, linear tuning slope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B3V9,115 | Same SOD323 package and 3.9 V rating, but ±5 % tolerance (B grade) and higher 100 Ω rdif | Acceptable where cost sensitivity outweighs precision; less suitable for <12-bit reference use | Select when budget constraints dominate and ±5 % regulation error is acceptable |
| MMSZ4685T1G | 3.9 V, ±5 %, SOD-123 package (larger, 2.7 mm × 1.6 mm), 100 Ω rdif, 500 nA IR at 1 V | Higher thermal mass and dissipation margin (500 mW), but incompatible with ultra-dense layouts | Choose when board space permits larger footprint and higher power derating is required |
Compared with BZX384-B3V9,115, PZU3.9B2A,115 delivers tighter regulation and lower noise; versus MMSZ4685T1G, it enables miniaturization and lower leakage but requires stricter thermal management on FR4.
Availability
PZU3.9B2A,115 is available at Aetrix Electronics and suitable for precision voltage reference, overvoltage protection, low-power bias networks, and oscillator trimming requiring stable component supply across industrial, medical, and consumer electronics programs.
Supply support for PZU3.9B2A,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 logic, discrete, and MOSFET solutions, with manufacturing rooted in process innovation and automotive-grade quality systems.
The PZUxBA series belongs to Nexperia's general-purpose Zener regulator product line, engineered specifically for compact, low-leakage, high-stability voltage reference and protection in space-constrained, energy-sensitive applications.
FAQ
What is the guaranteed Zener voltage range for PZU3.9B2A,115 at 5 mA test current?
The guaranteed Zener voltage is 3.87 V to 4.10 V at IZ = 5 mA and Tj = 25 °C, reflecting its ±2 % B2 tolerance grade as specified in Table 8 of the datasheet. This range remains valid across the full operating junction temperature range of −55 °C to +150 °C, with temperature coefficient of −2.5 mV/K typical.
Can PZU3.9B2A,115 be used in place of a 3.3 V Zener diode for voltage clamping?
No - PZU3.9B2A,115 is rated for 3.9 V nominal breakdown and is not interchangeable with 3.3 V Zeners due to fundamental voltage mismatch. Substituting would result in ~18 % higher clamping threshold, risking overvoltage damage to downstream circuitry. Use PZU3.3B2A,115 for 3.3 V applications.
What is the maximum continuous forward current rating for this Zener diode?
The absolute maximum forward current is 200 mA per Table 5 (Limiting Values). However, forward conduction is not its intended operating mode; sustained forward bias above 100 mA risks thermal runaway and permanent degradation, especially given its 320 mW total power limit and 390 K/W junction-to-ambient thermal resistance.
Does PZU3.9B2A,115 meet automotive AEC-Q200 requirements?
No - the PZUxBA series is not automotive-qualified. The datasheet explicitly states in Section 14 that "Unless this data sheet expressly states that this specific Nexperia product is automotive qualified, the product is not suitable for automotive use." It lacks AEC-Q200 stress testing, qualification reporting, and automotive-specific reliability screening.
PZU3.9B2A,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
PZU3.9B2A,115 FAQ
1.How can I place an order for PZU3.9B2A,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU3.9B2A,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 PZU3.9B2A,115 reliable?
The price and inventory of PZU3.9B2A,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU3.9B2A,115 is usually 5 days.
3.What payment methods are accepted for PZU3.9B2A,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU3.9B2A,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU3.9B2A,115?
PZU3.9B2A,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU3.9B2A,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 PZU3.9B2A,115?
For technical support, including PZU3.9B2A,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU3.9B2A,115 requirements.
6.How does Aetrix verify that PZU3.9B2A,115 is sourced from the original manufacturer or authorized distributors?
All PZU3.9B2A,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 PZU3.9B2A,115 meets industry standards.
7.What is the process for return or replacement of PZU3.9B2A,115?
All PZU3.9B2A,115 units undergo pre-shipment inspection (PSI). If there is an issue with PZU3.9B2A,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 PZU3.9B2A,115 part is unused and in its original packaging.
Return procedure for PZU3.9B2A,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PZU3.9B2A,115 Tags
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