PDZ3.9B,115 Nexperia Zener Diode (Small Outline Diode) In Stock
Nexperia PDZ3.9B,115 is a silicon Zener diode with a 3.9 V nominal breakdown voltage and ±2% tolerance, packaged in the compact 2-pin SOD-323 (SC-76) surface-mount case. Maximum dynamic impedance of 90 Ω makes it suitable for precision voltage clamping, reference, and protection circuits. Globally stocked with 8-week lead time for consumer electronics, automotive support, and general-purpose voltage regulation applications.
- Manufacturer
- Nexperia
- Package
- Small Outline Diode
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- PDZ3.9B,115 Datasheet PDF
- Category
- Zener Diode
- Temp Range
- ?°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 3.9 V Zener breakdown voltage with ±2% B-grade tolerance for accurate voltage clamping and reference applications
- Compact 2-pin SOD-323 (SC-76) package measuring 1.7 mm × 1.25 mm for high-density SMD PCB layouts
- Maximum dynamic impedance of 90 Ω ensuring stable Zener regulation under varying load conditions
- RoHS and REACH compliant silicon construction with 8-week factory lead time and global distributor availability
Applications
The PDZ3.9B,115 is used as a voltage clamp and reference diode in low-voltage analog circuits, microcontroller I/O protection networks, and signal-level clamping stages where a precise 3.9 V breakdown is required. Its compact SOD-323 package suits space-constrained PCBs in smartphones, wearables, IoT sensor nodes, and consumer electronics requiring ESD protection or overvoltage clamping on 3.3 V logic rails. The diode also functions as a simple shunt regulator in low-current bias networks for op-amp and comparator reference supplies.
Specifications
| Manufacturer Package Code | SOD323 |
| Factory Lead Time | 8Weeks |
| Date Of Intro | 1997-09-08 |
| YTEOL | 7 |
| Configuration | SINGLE |
| Diode Element Material | SILICON |
| Diode Type | ZENER DIODE |
| Dynamic Impedance-Max | 90Ω |
| JESD-30 Code | R-PDSO-G2 |
| JESD-609 Code | e3 |
| Knee Impedance-Max | 500Ω |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Polarity | UNIDIRECTIONAL |
| Power Dissipation-Max | 0.4W |
| Qualification Status | Not Qualified |
| Reference Standard | IEC-60134 |
| Reference Voltage-Nom | 3.9V |
| Reverse Current-Max | 3 µA |
| Reverse Test Voltage | 1V |
| Surface Mount | YES |
| Technology | ZENER |
| Terminal Finish | TIN |
| Terminal Form | GULL WING |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Temp Coeff-Max | -2.5 mV/°C |
| Voltage Tol-Max | 3.35% |
| Working Test Current | 5mA |
| Package | Small Outline Diode |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.50 |
| Country of Origin | Mainland China, Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PDZ3.9B,115:
suggested
Frequently Asked Questions
What is the Zener breakdown voltage and tolerance of the PDZ3.9B,115, and how does the B-grade tolerance affect voltage reference accuracy?
The PDZ3.9B,115 has a nominal Zener breakdown voltage of 3.9 V with a ±2% B-grade tolerance, meaning the actual breakdown voltage falls between approximately 3.82 V and 3.98 V. For voltage clamping and overvoltage protection this tolerance is acceptable; for higher-accuracy reference circuits requiring tighter than ±2% accuracy, a tighter-grade Zener or dedicated bandgap reference may be more appropriate.
How does the SOD-323 package size of the PDZ3.9B,115 benefit high-density PCB designs compared to larger diode packages?
The SOD-323 (SC-76) package measures approximately 1.7 mm × 1.25 mm, which is significantly smaller than SOD-123 (3.5 mm × 1.6 mm) or SOD-80 (3.8 mm × 1.5 mm) alternatives. This compact 2-pin footprint allows placement in tight PCB areas near microcontroller I/O pins, battery management ICs, or analog signal-path nodes in smartphones, wearables, and IoT modules where board space is extremely limited.
What is the maximum dynamic impedance of the PDZ3.9B,115, and how does it affect voltage stability under load current variation?
The PDZ3.9B,115 has a maximum dynamic impedance of 90 Ω at the Zener operating current. This means the output voltage will shift approximately 90 mV for every 1 mA change in Zener current, so the voltage clamp point varies slightly with load. For low-current applications below a few milliamps this variation is small, but in circuits requiring tighter voltage stability a lower-impedance Zener or precision shunt reference like the TL431 should be considered.
Is the PDZ3.9B,115 suitable for protecting 3.3 V logic I/O pins from overvoltage transients in mixed-voltage systems?
Yes, with a 3.9 V breakdown voltage the PDZ3.9B,115 is well-matched for protecting 3.3 V logic I/O pins from overvoltage transients in mixed-voltage boards, where a 3.3 V rail may encounter spikes from 5 V legacy bus signals or ESD events. Placed between an I/O pin and ground, the diode clamps transient voltages above 3.9 V, limiting the voltage presented to the CMOS input and protecting gates rated for 3.3 V or 5 V maximum input.
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