Nexperia USA Inc. BZV55-C43,135

Overview

BZV55-C43,135 from Nexperia is a ±5 % tolerance silicon Zener diode in a hermetically sealed SOD80C glass SMD package, rated for 43 V nominal Zener voltage at 2 mA test current, 400 mW total power dissipation at T_amb ≤ 50 °C, and 40 W non-repetitive peak reverse power (100 µs square wave). It serves as a precision low-power voltage reference or regulation element in analog signal conditioning and power rail stabilization circuits.

For engineers reviewing the BZV55-C43,135 datasheet, BZV55-C43,135 pinout, BZV55-C43,135 application, or BZV55-C43,135 equivalent, key selection criteria include Zener voltage tolerance (±5 %), differential resistance (85 Ω typ. at I_Z = 2 mA), temperature coefficient (+45 mV/K), junction-to-ambient thermal resistance (380 K/W), and SOD80C package compatibility with reflow soldering per JEDEC J-STD-020.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its 43 V nominal Zener voltage is specified at I_Z = 2 mA, with a typical differential resistance of 85 Ω and a positive temperature coefficient of +45 mV/K - indicating voltage increases with junction temperature.

The device uses a planar epitaxial construction in a hermetically sealed glass package, enabling stable long-term performance and low leakage (<50 nA at V_R = 0.7 × V_Z(nom)). It complies with IEC 60134 absolute maximum ratings and supports transient surge handling up to 40 W for 100 µs pulses at T_j = 25 °C.

Key Specifications

Pinout & Package

Hermetically sealed glass SOD80C surface-mount package: 3.3–3.7 mm length, 1.45–1.60 mm width, 0.3 mm height; cathode indicated by marking band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZV55-C43,135, the BZV55-B43,115 offers superior regulation accuracy at higher cost, while MMBZ5257BS-7-F trades package size and power rating for board density - neither is pin-compatible due to differing SMD outlines (SOD80C vs. SOT-23).

Availability

BZV55-C43,135 is available at Aetrix Electronics and suitable for power supply feedback networks, overvoltage protection circuits, and precision reference voltage sources requiring stable component supply across industrial control, instrumentation, and telecom infrastructure designs.

Supply support for BZV55-C43,135 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, analog, and discrete components optimized for efficiency, reliability, and miniaturization in industrial and consumer systems.

The BZV55 series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-sensitive, low-power voltage regulation and clamping in space-constrained SMT applications.

FAQ

What is the maximum continuous reverse current the BZV55-C43,135 can sustain without exceeding its 400 mW power rating?

At 43 V nominal Zener voltage, the maximum continuous reverse current is approximately 9.3 mA (400 mW ÷ 43 V), assuming ambient temperature ≤ 50 °C and no additional thermal derating. This value decreases linearly with rising ambient temperature per the R_th(j-a) = 380 K/W specification.

How does the +45 mV/K temperature coefficient affect circuit performance in a 0 °C to 70 °C operating range?

Over a 70 °C junction temperature swing, the Zener voltage shifts by +3.15 V (45 mV/K × 70 K), resulting in a final V_Z range of ~43.2 V to ~46.3 V. This must be accounted for in feedback divider design to maintain output accuracy across temperature.

Can BZV55-C43,135 replace a through-hole 1N4752A in an existing design?

Yes, provided the PCB layout accommodates the SOD80C footprint (3.3–3.7 mm × 1.45–1.60 mm) and thermal management accounts for lower P_tot (400 mW vs. 1W). The electrical characteristics - 43 V V_Z, ±5 % tolerance, and similar r_dif - are functionally equivalent.

Why is the non-repetitive peak reverse current (I_ZSM) not explicitly listed for the BZV55-C43,135 in Table 9?

I_ZSM is derived from P_ZSM = 40 W and V_Z = 43 V, yielding ~0.93 A (40 W ÷ 43 V). Table 9 omits explicit I_ZSM because it is calculated from the fixed P_ZSM and nominal V_Z, consistent with Nexperia's characterization methodology for the full BZV55-C series.