Nexperia USA Inc. BZX585-C3V6,135

Overview

BZX585-C3V6,135 from Nexperia is a ±5 % tolerance Zener diode in SOD523 (SC-79) package, rated for 3.6 V nominal regulation voltage at 5 mA, with 375 Ω typical differential resistance and 5.0 µA max reverse current at 1.0 V, used for precision low-power voltage reference and overvoltage clamping in space-constrained consumer and industrial power rails.

For engineers reviewing the BZX585-C3V6,135 datasheet, BZX585-C3V6,135 pinout, BZX585-C3V6,135 application, or BZX585-C3V6,135 equivalent, this part supports stable 3.6 V regulation under 200 mA forward current, withstands 40 W non-repetitive surge, and delivers low thermal resistance (65 K/W to solder point) for compact PCB designs requiring tight voltage tolerance and fast transient response.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 3.6 V at I_Z = 5 mA, exhibiting a temperature coefficient of −1.9 mV/K across 25–150 °C, enabling predictable drift compensation in bias networks. Its low 375 Ω differential resistance ensures minimal output impedance variation under load changes.

The device features ultra-small SOD523 packaging with cathode-marked anisotropic leadframe, optimized for reflow-compatible footprint (1.4 mm × 0.85 mm), and achieves 300 mW total power dissipation on FR4 PCB with 35 mm² copper area-critical for thermal stability in high-density layouts.

Key Specifications

Pinout & Package

SOD523 (SC-79) ultra-small flat-lead surface-mount package: 1.70 mm length × 0.85 mm width × 0.65 mm height, cathode identified by marking bar on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX585-C3V6,135, the BZX585-B3V6,135 improves voltage accuracy at the expense of higher unit cost, while MMSZ5226B-7-F trades miniaturization for enhanced thermal margin-making the C-grade optimal for cost-sensitive, space-constrained 3.6 V reference nodes.

Availability

BZX585-C3V6,135 is available at Aetrix Electronics and suitable for consumer wearables, industrial sensor nodes, and portable medical devices requiring stable component supply with guaranteed long-term sourcing.

Supply support for BZX585-C3V6,135 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 focused on high-volume, high-reliability discrete and logic devices, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.

The BZX585 series targets general-purpose voltage regulation in ultra-compact SMD packages, designed specifically for space-constrained applications needing stable Zener performance without thermal derating penalties.

FAQ

What is the maximum continuous reverse current the BZX585-C3V6,135 can sustain?

The device is rated for 200 mA maximum forward current, but as a Zener diode it operates in reverse bias; its continuous reverse current is limited by power dissipation. At 25 °C ambient on FR4 with 35 mm² copper, 300 mW P_tot allows ~83 mA average reverse current at 3.6 V-exceeding typical reference or clamp use cases.

How does the −1.9 mV/K temperature coefficient affect regulation accuracy over temperature?

Over a −40 to +125 °C junction range, the coefficient causes ~315 mV total drift (165 K × 1.9 mV/K). However, since V_Z = 3.6 V, this represents ~8.8 % deviation-mitigated in practice by using the diode within narrow ambient bands or pairing with complementary components in compensated references.

Can BZX585-C3V6,135 be used in series with other Zeners for higher voltage references?

Yes-its low 5 µA leakage at 1 V ensures minimal current imbalance when stacked. However, thermal coupling between devices must be managed, as self-heating alters individual V_Z values; parallel operation is not recommended due to mismatched breakdown characteristics.

Is the SOD523 package compatible with standard reflow profiles for lead-free soldering?

Yes-the device is qualified for JEDEC J-STD-020 moisture sensitivity level 1 and supports peak reflow temperatures up to 260 °C. The recommended footprint (1.4 mm × 0.85 mm pads with 0.4 mm spacing) ensures reliable solder joint formation without tombstoning or voiding.