Nexperia USA Inc. TDZ3V9J,115

Overview

TDZ3V9J,115 from Nexperia is a single Zener diode in SOD323F (SC-90) package, designed for precision voltage regulation and overvoltage protection in space-constrained PCBs. It delivers a nominal Zener voltage of 3.9 V (min 3.82 V, max 3.98 V) at I_Z = 5 mA, with differential resistance ≤500 Ω, total power dissipation up to 500 mW, and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the TDZ3V9J,115 datasheet, TDZ3V9J,115 pinout, TDZ3V9J,115 application, or TDZ3V9J,115 equivalent, this device is selected for low-voltage rail clamping, ESD-sensitive interface protection, and biasing circuits where tight tolerance, low capacitance (370 pF), and thermal robustness (R_th(j-a) = 250 K/W) are critical.

Technical Context

This Zener operates in reverse breakdown mode with a temperature coefficient of −3.5 mV/K (typical), enabling stable reference behavior across −55 °C to +150 °C ambient. Its low forward voltage (≤1.1 V at 100 mA) supports bidirectional transient suppression when used with series blocking elements.

The device features non-repetitive peak reverse power dissipation of 180 W (t_p ≤ 300 µs, δ ≤ 0.02), validated under FR4 PCB mounting conditions (16 mm² cathode pad), and exhibits reverse current ≤3 µA at V_R = 1 V - critical for low-leakage standby regulation.

Key Specifications

Pinout & Package

SOD323F (SC-90) surface-mount plastic package: 2-pin, ultra-compact footprint (2.7 × 1.6 mm, height 0.95 mm), cathode marked by bar on top surface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Compared with BZX384-B3V9,115 and MMSZ4685T1G, TDZ3V9J,115 offers tighter voltage tolerance, lower leakage, and superior thermal performance in the smallest footprint - making it optimal for next-generation automotive and portable electronics where precision, size, and efficiency are co-prioritized.

Availability

TDZ3V9J,115 is available at Aetrix Electronics and suitable for automotive ECUs, USB-C port protection circuits, and battery-powered IoT sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TDZ3V9J,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 delivering high-performance logic, discrete, and MOSFET devices optimized for efficiency, reliability, and miniaturization in automotive, industrial, and consumer systems.

The TDZxJ series targets space-constrained voltage regulation and transient protection, emphasizing AEC-Q101 compliance, low capacitance, and tight Zener tolerances for modern electronics demanding precision in minimal footprints.

FAQ

What is the maximum continuous reverse current the TDZ3V9J,115 can sustain at 25 °C ambient?

The TDZ3V9J,115 is rated for total power dissipation of 500 mW at T_amb ≤ 25 °C. At its nominal Zener voltage of 3.9 V, this corresponds to a maximum continuous reverse current of approximately 128 mA (500 mW ÷ 3.9 V). Derating is required above 25 °C per the 250 K/W junction-to-ambient thermal resistance.

How does the −3.5 mV/K temperature coefficient affect regulation accuracy over temperature?

With a typical temperature coefficient of −3.5 mV/K, the Zener voltage decreases by ~0.35 V across a 100 °C range (e.g., −40 °C to +60 °C). This results in a worst-case drift of ±0.175 V from nominal 3.9 V - a ±4.5% shift. For applications requiring tighter stability, this must be accounted for in reference design margins or compensated via circuit topology.

Can TDZ3V9J,115 be used in bidirectional TVS configurations?

No - TDZ3V9J,115 is a unidirectional Zener diode. Its forward voltage is ~0.9 V at 10 mA, but it lacks symmetric breakdown characteristics. For bidirectional transient suppression, a paired configuration (e.g., two devices anode-to-anode) or a dedicated bidirectional TVS like PESD3V3L1BA is required.

Is reflow soldering the only recommended assembly method for this device?

Yes - the datasheet explicitly states "Reflow soldering is the only recommended soldering method" for the SOD323F package. Wave soldering or hand soldering risks thermal damage due to the device's small mass and sensitivity to localized overheating; IPC/JEDEC J-STD-020-compliant reflow profiles must be followed.