Nexperia USA Inc. BZV90-C39,115

Overview

BZV90-C39,115 from Nexperia is a medium-power Zener voltage regulator diode in SOT223 package, rated for 39 V nominal working voltage at 2 mA test current, with ±5% tolerance, 1.5 W total power dissipation, and 40 W non-repetitive peak reverse power capability. It serves as a precision reference or overvoltage clamp in DC power supply feedback loops and industrial sensor signal conditioning circuits.

For engineers reviewing the BZV90-C39,115 datasheet, BZV90-C39,115 pinout, BZV90-C39,115 application, or BZV90-C39,115 equivalent, key selection criteria include its 39 V regulation voltage, low temperature coefficient of +0.7 mV/K at I_Z = 5 mA, differential resistance of 45 Ω, 2 cm² PCB copper area thermal derating requirement, and dual-cathode (pins 2 & 4) SOT223 configuration.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its design integrates a low-impedance cathode structure with pins 2 and 4 electrically tied internally, enabling robust heat dissipation through the exposed collector pad in the SOT223 package.

Electrical behavior is defined by three critical operating points: nominal Zener voltage (37–41 V), differential resistance (33.4–37.4 Ω), and temperature coefficient (+0.7 mV/K typical), all specified at I_Ztest = 2 mA and T_j = 25 °C - parameters directly influencing stability in closed-loop regulation and reference buffering.

Key Specifications

Pinout & Package

SOT223 plastic surface-mounted package with exposed collector pad for thermal conduction; 4-terminal configuration where pins 2 and 4 are internally connected cathodes, pin 1 and pin 3 are anodes (dual-anode construction for layout flexibility).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZV90-C39,115, BZX84-C39 offers smaller footprint but sacrifices 77% power handling and 50% surge capacity, while 1N4739A provides comparable regulation but lacks the dual-cathode low-inductance advantage and SMT manufacturability needed for high-volume industrial PCBs.

Availability

BZV90-C39,115 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, and telecom infrastructure equipment requiring stable component supply with full traceability and extended lifecycle support.

Supply support for BZV90-C39,115 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 leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on high-volume, high-reliability components for automotive, industrial, and computing markets.

The BZV90 series belongs to Nexperia's precision Zener regulator portfolio, engineered specifically for stable voltage reference and overvoltage protection in harsh-environment power systems where thermal robustness and parametric consistency are critical.

FAQ

What is the maximum continuous reverse current this diode can handle at 39 V?

The BZV90-C39,115 does not specify a maximum continuous reverse current independent of power dissipation. At 39 V, the absolute maximum continuous Zener current is derived from P_tot = 1500 mW, yielding I_Zmax ≈ 38.5 mA at 25 °C ambient on a 2 cm² FR4 PCB. Derating applies above 25 °C per R_{th j-a} = 83.3 K/W.

Can pins 1 and 3 be used simultaneously as anodes in a single circuit?

Yes - pins 1 and 3 are both anodes and are not internally connected. They may be wired independently to separate current paths or paralleled to share forward conduction in high-current clamp configurations, provided layout symmetry maintains thermal balance across the SOT223 body.

Is the temperature coefficient measured at 2 mA or another current?

The temperature coefficient (S_Z = +0.7 mV/K) is specified at I_Ztest = 2 mA and T_j = 25 °C, as confirmed in the "Per type" table on page 3 of the 1999 May 17 datasheet. It varies with operating current, decreasing toward zero near 5 mA for this part.

Does the dual-cathode configuration affect solder joint reliability during reflow?

No - pins 2 and 4 are electrically bonded internally and share identical thermal expansion characteristics. The SOT223 package has been qualified per J-STD-020D for standard lead-free reflow profiles, and the dual-cathode layout actually improves mechanical stability by distributing thermal stress across two symmetric terminations.