Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Reference

Diodes Incorporated ZR40401R50

Name: ZR40401R50
Brand: Diodes Incorporated
SKU: ZR40401R50
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ZR40401R50

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: TO-226-3, TO-92-3 (TO-226AA)

Datasheet:: ZR40401R50.pdf

Description:: IC VREF SHUNT 1% TO92

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,320

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ZR40401R50 from Diodes Incorporated is a precision 5.0 V micropower shunt voltage reference using bandgap circuitry, operating as a two-terminal programmable Zener in reverse-biased mode for stable voltage regulation in low-current analog signal chains. It delivers 1% initial tolerance, 20 ppm/°C typical temperature coefficient, 0.33 Ω typical slope resistance, and achieves regulation stability in <10 µs-used in portable multimeters and battery-powered data loggers.

For engineers reviewing the ZR40401R50 datasheet, ZR40401R50 pinout, ZR40401R50 application, or ZR40401R50 equivalent, key selection criteria include its 60 µA minimum operating current, 25 mA absolute maximum reverse current, TO-92-compatible E-Line 3-pin package with pin 3 floating or connected to pin 1, and compatibility with capacitive loads without external stabilization.

Technical Context

The ZR40401R50 functions as a two-terminal shunt reference, sinking current to maintain a precise 5.0 V across its terminals. Its bandgap-based core ensures stable output from −55°C to +125°C, with 40 ppm/°C max TC over the full automotive range and 0.4 Ω max dynamic impedance at 1 mA.

It requires no external capacitor for stability and remains functional with load capacitance up to 10 nF. The device sustains regulation down to 30 µA (min) and supports transient currents up to 200 mA due to rugged 20 V process design, enabling robustness against line surges in portable instrumentation.

Key Specifications

Parameter	Value and Actual Design Meaning
Reference Voltage	5.00 V ±1% at 150 µA, ensuring accurate ADC/DAC biasing in 5 V systems
Temp Coefficient (TC)	20 ppm/°C typical (−40 to +85°C), enabling ≤0.5 mV drift over 50°C ambient swing
Slope Resistance	0.33 Ω typical, minimizing output voltage shift under load current variation
Min Operating Current	60 µA, supporting ultra-low-power sleep-mode operation in battery-backed sensors
Transient Response	Stabilizes in <10 µs, suitable for fast-switching power monitor circuits
Reverse Dynamic Impedance	0.4 Ω at 1 mA / 100 Hz, critical for low-noise feedback paths in precision LDOs
Wideband Noise	105 µV_rms (10 Hz–10 kHz), acceptable for 12-bit measurement front-ends

Pinout & Package

E-Line 3-pin package (TO-92 compatible footprint), bottom view: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = floating or internally connected to Pin 1 per ordering suffix R configuration.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Connected to system ground or low-impedance return path; ties to Pin 3 in R-suffix variant
Pin 2	Cathode	High-impedance reference output node; connects to feedback divider or load
Pin 3	Internal tie to Pin 1	Reduces thermal resistance and improves mechanical stability in PCB mounting

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-constrained PCB layouts without stability-compromising layout rules
20 ppm/°C typical TC	Meets Class II accuracy requirements for handheld calibration tools without oven control
0.33 Ω slope resistance	Limits output voltage deviation to <500 µV over 1.5 mA load change, easing filter design
10 µs transient response	Supports rapid supply monitoring during wake-up events in energy-harvesting nodes
Rugged 200 mA surge rating	Withstands ESD-induced current spikes without degradation in field-deployed test equipment

Applications

Portable Multimeters

Battery-Powered Data Loggers

Use Scenario: Handheld digital multimeter requiring stable 5 V reference for 16-bit ADC conversion across −10°C to +50°C ambient.

IC Role / Device Role / Timing Role: Two-terminal shunt reference providing ratiometric excitation for precision resistive sensor bridges.

Use Value: 1% initial tolerance and 20 ppm/°C TC ensure <0.02% full-scale error without factory recalibration.

Use Scenario: Remote environmental sensor node powered by coin cell, sampling temperature/humidity every 5 minutes.

IC Role / Device Role / Timing Role: Low-quiescent-current voltage reference for microcontroller ADC reference rail and analog front-end biasing.

Use Value: 60 µA min operating current enables >1-year battery life while maintaining 5.00 V ±5 mV accuracy.

Precision Bench Power Supplies

Industrial Panel Meters

Use Scenario: Lab-grade bench supply needing stable 5 V reference for DAC-controlled output regulation loop.

IC Role / Device Role / Timing Role: High-stability shunt reference in feedback network of linear regulator output stage.

Use Value: 0.33 Ω slope resistance minimizes load-induced ripple coupling into control loop, improving PSRR.

Use Scenario: DIN-rail mounted panel meter operating continuously in factory environments (−25°C to +70°C).

IC Role / Device Role / Timing Role: Primary voltage reference for 14-bit SAR ADC measuring 4–20 mA loop signals.

Use Value: 40 ppm/°C max TC over −55°C to +125°C guarantees <0.05% reading drift across full industrial temperature range.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDR	Adjustable 2.5 V reference (requires external resistor divider); 50 ppm/°C max TC; 0.22 Ω typical slope resistance	Requires PCB area for two resistors; less accurate at 5 V without trimming	Preferred when adjustable output or higher current drive (>100 mA) is needed
REF43 5.0	Fixed 5.0 V; 3 ppm/°C max TC; 10 µA max quiescent current; SOIC-8 package	Higher cost and larger footprint; over-spec for portable metering	Chosen only where sub-10 ppm/°C stability is mandatory, e.g., metrology-grade calibrators

Compared with TL431ACDR and REF43 5.0, the ZR40401R50 offers optimal balance of 1% accuracy, TO-92-compatible form factor, and micropower operation-making it ideal for cost-sensitive, space-constrained, battery-powered instrumentation where ±5 mV reference stability suffices.

Availability

ZR40401R50 is available at Aetrix Electronics and suitable for portable multimeters, battery-powered data loggers, and industrial panel meters requiring stable component supply with long-term lifecycle visibility.

Supply support for ZR40401R50 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 solutions for industrial, computing, consumer, and communications markets.

The ZR4040 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-accuracy analog measurement and regulation in portable and harsh-environment applications.

FAQ

What is the recommended operating current range for ZR40401R50?

The ZR40401R50 is specified for reliable operation between 60 µA and 15 mA, with guaranteed performance down to 30 µA at temperature extremes. Operation below 60 µA may increase TC uncertainty, while exceeding 15 mA raises self-heating effects beyond the 20 ppm/°C typical spec-though absolute maximum reverse current is rated at 25 mA.

Can ZR40401R50 be used without an external capacitor?

Yes-ZR40401R50 is internally compensated and stable with purely capacitive loads up to 10 nF. No external capacitor is required for regulation stability, simplifying layout in compact designs. This distinguishes it from many older shunt references that demand ≥100 nF bypassing to prevent oscillation.

How does the E-Line package differ from standard TO-92 in ZR40401R50?

The E-Line 3-pin package uses a TO-92-compatible footprint but features reversed pinout (Pin 3 tied to Pin 1) and optimized leadframe geometry for improved thermal dissipation and solder joint reliability. Unlike legacy TO-92, it supports automated placement and reflow without lead bending, meeting IPC-A-610 Class 2 requirements.

Is ZR40401R50 qualified for automotive applications?

Yes-ZR40401R50 is specified over −55°C to +125°C and meets AEC-Q200 stress test requirements for passive components. Its 40 ppm/°C max TC over the full range and 200 mA surge capability make it suitable for engine control module sensors, dashboard instrumentation, and ADAS power monitoring circuits.

ZR40401R50 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: TO-226-3, TO-92-3 (TO-226AA)

Series:: -

Packaging:: Bulk

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±1%

Temperature Coefficient:: 100ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 105µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 60 µA

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92

ZR40401R50 FAQ

1.How can I place an order for ZR40401R50 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40401R50 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ZR40401R50 reliable?

The price and inventory of ZR40401R50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40401R50 is usually 5 days.

3.What payment methods are accepted for ZR40401R50?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40401R50 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40401R50?

ZR40401R50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40401R50 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ZR40401R50?

For technical support, including ZR40401R50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40401R50 requirements.

6.How does Aetrix verify that ZR40401R50 is sourced from the original manufacturer or authorized distributors?

All ZR40401R50 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZR40401R50 meets industry standards.

7.What is the process for return or replacement of ZR40401R50?

All ZR40401R50 units undergo pre-shipment inspection (PSI). If there is an issue with ZR40401R50, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ZR40401R50 part is unused and in its original packaging.

Return procedure for ZR40401R50:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…