Diodes Incorporated ZR40401R41

Overview

ZR40401R41 from Diodes Incorporated is a precision micropower 4.1 V bandgap voltage reference in E-Line (TO-92) package, rated for 1% initial tolerance, 20 ppm/°C typical temperature coefficient, and stable operation from 60 µA to 15 mA. It requires no external capacitor, supports capacitive loads, and delivers fast turn-on (<5 µs), making it ideal for battery-powered instrumentation and portable metering systems.

For engineers reviewing the ZR40401R41 datasheet, ZR40401R41 pinout, ZR40401R41 application, or ZR40401R41 equivalent, key selection criteria include low quiescent current (60 µA min), slope resistance (0.55 Ω typ), wide operating current range (60 µA–15 mA), thermal stability (–40°C to +85°C), and TO-92 mechanical compatibility for through-hole legacy designs.

Technical Context

The ZR40401R41 implements a two-terminal shunt topology with bandgap-derived reference core, enabling stable 4.1 V output without series pass element or external compensation. Its internal design achieves low dynamic impedance (0.5 Ω typ at 1 mA, 100 Hz) and wideband noise of 90 µV_rms (10 Hz–10 kHz), supporting high-accuracy ADC/DAC biasing and precision oscillator trimming.

It operates as a reverse-biased device: cathode (Pin 1) connects to regulated rail, anode (Pin 3) to ground, with Pin 2 floating or tied to Pin 1 per E-Line package configuration. Absolute maximum ratings include 25 mA continuous reverse current and 200 mA transient surge capability, enabled by rugged 20 V process technology.

Key Specifications

Pinout & Package

E-Line (TO-92) 3-pin through-hole package with reversed pinout: Pin 1 = Cathode, Pin 2 = Floating or connected to Pin 1, Pin 3 = Anode. Mechanical compatibility with legacy TO-92 footprints enables drop-in replacement in existing designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar shunt voltage reference applications.

Compared with TL431ACLP and LM4040C41IDBZR, ZR40401R41 uniquely combines TO-92 through-hole compatibility, 1% tolerance, 20 ppm/°C typical tempco, and 60 µA minimum current-making it optimal for cost-sensitive, space-limited, and thermally demanding battery-operated instrumentation.

Availability

ZR40401R41 is available at Aetrix Electronics and suitable for battery-powered portable meters, precision data acquisition systems, and industrial crystal oscillator stabilization requiring stable component supply across extended product lifecycles.

Supply support for ZR40401R41 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.

ZR40401R41 belongs to the ZR4040 precision shunt reference family, designed specifically for low-power, high-stability voltage referencing in portable, industrial, and test equipment where size, accuracy, and thermal performance are critical.

FAQ

What is the correct biasing configuration for ZR40401R41 in a shunt reference circuit?

ZR40401R41 operates as a two-terminal shunt device: connect Pin 1 (cathode) to the regulated voltage node and Pin 3 (anode) to ground. A series resistor between the supply and cathode sets the operating current. Pin 2 is internally unconnected and may be left floating or bonded to Pin 1 per mechanical requirements.

Can ZR40401R41 drive a 10 nF capacitive load without instability?

Yes-ZR40401R41 is explicitly characterized as stable with capacitive loads up to at least 10 nF, per its datasheet AC response and transient testing. No external compensation capacitor is required, unlike many older shunt references that demand 1–10 nF bypassing for phase margin.

How does the 200 mA surge rating impact real-world reliability?

The 200 mA absolute maximum surge rating reflects ruggedized silicon processing, allowing ZR40401R41 to survive brief ESD events (IEC 61000-4-2 Level 4), hot-swap transients, and inductive kickback without parameter shift or failure-reducing need for TVS diodes in cost-sensitive designs.

Is ZR40401R41 compatible with lead-free reflow profiles?

Yes-ZR40401R41 in E-Line (TO-92) package is qualified for standard lead-free reflow (J-STD-020, peak 260°C). Its 125°C max storage temperature and 85°C max operating ambient ensure robustness through multiple reflow cycles and long-term field operation.