Nexperia USA Inc. TDZ30J,115

Overview

TDZ30J,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 30 V (29.4–30.6 V at I_Z = 2 mA), 250 Ω differential resistance, ≤0.05 µA reverse current at 21 V, AEC-Q101 qualification, and 500 mW total power dissipation at T_amb ≤ 25 °C - deployed in automotive body control modules for ECU reference rail stabilization.

For engineers reviewing the TDZ30J,115 datasheet, TDZ30J,115 pinout, TDZ30J,115 application, or TDZ30J,115 equivalent, key selection criteria include Zener voltage tolerance, low leakage at sub-breakdown bias, thermal resistance to solder point (25 K/W), and pulse survivability up to 40 W for 100 µs surges - critical for transient suppression in 12 V/24 V automotive subsystems.

Technical Context

This device operates as a two-terminal shunt regulator with fixed breakdown voltage defined by controlled doping and junction geometry. Its temperature coefficient of +21 to +29.4 mV/K ensures predictable drift under thermal cycling, while the 250 Ω dynamic impedance maintains stable regulation across 1–10 mA Zener current range.

The SOD323F package enables direct integration into high-density layouts with minimal thermal mass; its FR4 PCB mounting pad (16 mm² cathode pad) supports R_th(j-sp) = 25 K/W, allowing reliable operation up to 150 °C junction temperature during intermittent surge events.

Key Specifications

Pinout & Package

SOD323F (SC-90) is a 2-pin surface-mount plastic package measuring 2.7 × 1.6 × 0.95 mm (L × W × H), with gull-wing leads and cathode marked by a bar on the top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B30,115 and MMSZ5261ET1G, TDZ30J,115 uniquely combines AEC-Q101 qualification, 40 W surge capability, and SOD323F miniaturization - making it the sole option for space-constrained, safety-compliant automotive voltage references where long-term parametric stability is mandatory.

Availability

TDZ30J,115 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor signal chains, USB-C power delivery monitors, and smart meter reference designs requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for TDZ30J,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 essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and mobile markets.

The TDZxJ series targets automotive-qualified Zener regulation in ultra-compact packages, specifically engineered to replace through-hole Zeners in next-generation ECU and ADAS subsystems where board space and AEC compliance are non-negotiable.

FAQ

What is the maximum non-repetitive surge current the TDZ30J,115 can handle?

The TDZ30J,115 supports a non-repetitive peak reverse current (I_ZSM) of 1 A at t_p = 100 µs, derived from its 40 W peak power rating and 30 V Zener voltage. This value is validated per IEC 60134 limiting conditions and applies only to single-event transients - repeated surges require derating per Figure 1 in the datasheet.

How does the temperature coefficient affect regulation accuracy over temperature?

With a specified temperature coefficient of +21 to +29.4 mV/K, the TDZ30J,115 exhibits a predictable positive drift: approximately +0.7% per 10 °C rise from 25 °C. At 105 °C ambient, V_Z increases by ~2.3 V - a known, linear offset that can be compensated in system-level calibration routines.

Is the SOD323F package compatible with standard reflow profiles?

Yes - Nexperia specifies reflow soldering as the only recommended process, with peak temperatures up to 260 °C for ≤10 seconds. The SOD323F outline (Figure 7) and solder land pattern (Figure 8) are fully aligned with IPC-7351B density level A, supporting automated placement and Type 3 solder paste.

Can TDZ30J,115 replace older Zener diodes like 1N4749A in existing designs?

No - the 1N4749A uses DO-41 through-hole packaging (5.2 × 2.7 mm) and has different thermal characteristics (R_th(j-a) ≈ 75 K/W). Direct replacement requires PCB redesign for SOD323F pads, updated thermal modeling, and verification of surge response due to lower junction-to-solder-point resistance (25 K/W vs. ~100 K/W).