Nexperia USA Inc. NZX4V3D,133

Overview

NZX4V3D,133 from Nexperia is a single Zener diode in a hermetically sealed SOD27 (SC-40) glass package, designed for precision voltage regulation at 4.3 V nominal Zener voltage with ±0.2 V tolerance, 100 Ω typical differential resistance at I_Z = 5 mA, and ≤3 µA reverse leakage current. It delivers stable reference voltage in low-power analog circuits, power supply feedback loops, and overvoltage protection stages.

For engineers reviewing the NZX4V3D,133 datasheet, NZX4V3D,133 pinout, NZX4V3D,133 application, or NZX4V3D,133 equivalent, key selection criteria include its 4.3 V Zener voltage accuracy, low thermal coefficient near zero crossing, axial-leaded SOD27 package compatibility with through-hole PCB assembly, and suitability for industrial-grade voltage clamping where long-term stability under ambient temperature variation is required.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified working voltage of 4.3 V at 5 mA test current, exhibiting a near-zero temperature coefficient around this bias point-critical for stable reference generation across −55 °C to +175 °C ambient range. Its low 100 Ω differential resistance ensures minimal output voltage deviation under load current shifts.

The device uses a hermetically sealed glass package (SOD27/SC-40) with axial leads, enabling reliable operation in high-humidity or corrosive environments. Thermal resistance from junction to ambient is 380 K/W in free air, limiting continuous power dissipation to 500 mW at T_amb ≤ 25 °C per absolute maximum ratings.

Key Specifications

Pinout & Package

Package: SOD27 (SC-40), hermetically sealed axial-leaded glass package with cathode band marking; lead length ≤ 8 mm; mounted on FR4 PCB without metallization pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55-C4V3 and MMSZ4V3T1G, NZX4V3D,133 offers superior long-term stability via hermetic sealing, tighter voltage tolerance (±0.2 V vs. ±5%), and lower dynamic impedance-making it optimal for mission-critical industrial references where calibration interval extension and field reliability are prioritized over cost or footprint.

Availability

NZX4V3D,133 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, sensor signal conditioning, and medical diagnostic equipment requiring stable component supply with guaranteed long-lifecycle support.

Supply support for NZX4V3D,133 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, reliable, and efficient discrete, logic, and MOSFET solutions with focus on automotive, industrial, and mobile markets.

The NZX series targets general-purpose Zener regulation with emphasis on hermetic reliability, tight voltage tolerance, and wide temperature operation-designed specifically for applications demanding decades-long stability without recalibration.

FAQ

What is the maximum continuous reverse current the NZX4V3D,133 can sustain without degradation?

The device is rated for 500 mW total power dissipation at T_tp ≤ 25 °C, corresponding to a maximum continuous reverse current of approximately 116 mA at 4.3 V (P = V × I). Derating is required above 25 °C ambient per the 380 K/W junction-to-ambient thermal resistance; at 70 °C ambient, max continuous I_Z drops to ~75 mA to maintain T_j ≤ 175 °C.

How does the cathode band marking align with standard PCB silkscreen conventions?

The black cathode band on the SOD27 package corresponds directly to Pin 1, which must be routed to the higher-potential node (e.g., output rail or V_CC) in Zener regulation mode. Standard PCB footprints designate the band-aligned pad as "K" or "CATH" and place it adjacent to the silkscreen polarity indicator (e.g., "|>" symbol pointing toward anode).

Can NZX4V3D,133 be used in series or parallel configurations for higher voltage or current handling?

Series connection is viable for higher Zener voltage (e.g., two units yield ~8.6 V), but mismatched temperature coefficients cause unequal voltage sharing; parallel use is not recommended due to thermal runaway risk from positive TC interaction and parameter spread. For >500 mW needs, discrete heat sinking or switching regulators are preferred.

Is NZX4V3D,133 compliant with RoHS and REACH regulations?

Yes-Nexperia confirms NZX4V3D,133 meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead content <1000 ppm and no SVHC substances above 0.1% w/w threshold. Full compliance documentation is available via Nexperia's product portal using 12NC 933687133113.