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 ZR40402R50

Name: ZR40402R50
Brand: Diodes Incorporated
SKU: ZR40402R50
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ZR40402R50

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZR40402R50.pdf

Description:: IC VREF SHUNT 2% TO92

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,482

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

Product details

Overview

ZR40402R50 from Diodes Incorporated is a precision micropower shunt voltage reference delivering 5.0 V ±2% output with 20 ppm/°C typical temperature coefficient, 0.33 Ω typical slope resistance, and stable operation from 60 µA to 15 mA - used as a compact, capacitor-free reference in battery-powered instrumentation and portable data acquisition systems.

For engineers reviewing the ZR40402R50 datasheet, ZR40402R50 pinout, ZR40402R50 application, or ZR40402R50 equivalent, key selection factors include its E-Line (TO-92 compatible) package, no external capacitor requirement, transient stability under 10 µs, 25 mA absolute max reverse current, and automotive-grade −55°C to +125°C operating range.

Technical Context

The ZR40402R50 is a two-terminal bandgap-based shunt voltage reference configured for reverse-biased operation, where cathode connects to supply and anode to ground or adjustable bias network. It regulates by sinking variable current to maintain 5.0 V across its terminals independent of load current within specified operating range.

Its internal architecture eliminates need for external stabilization capacitance while supporting capacitive loads up to 1 µF; dynamic impedance remains ≤1.0 Ω at 100 Hz and wideband noise is 105 µV_rms (10 Hz–10 kHz), enabling high-accuracy ADC reference and low-drift analog signal conditioning.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.00 V ±2% - tightly regulated reference for 12-bit+ SAR ADCs and precision DAC buffers
Temp Coefficient	20 ppm/°C typical (−40°C to +85°C) - enables <±0.5 mV drift over industrial temp range
Slope Resistance	0.33 Ω typical - ensures <1 mV output shift per 3 mA load change, critical for ratiometric sensor bridges
Operating Current	60 µA to 15 mA - supports ultra-low-power sleep modes and full-scale active measurement simultaneously
Transient Response	Stabilizes in <10 µs - suitable for multiplexed reference switching in multi-channel data loggers
Reverse Dynamic Impedance	0.4 Ω min / 1.0 Ω max at 100 Hz - maintains PSRR >60 dB in noisy power rail environments

Pinout & Package

E-Line (3-pin TO-92 compatible) package with molded plastic body, axial lead form, and pin 3 floating or connected to pin 1 per datasheet Rev package configuration.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reference return node	Connected to system ground or low-impedance return path; defines 0 V reference point for regulation
Cathode (Pin 2)	Input/reference output node	Connected to supply rail or divider network; voltage at this pin is regulated to 5.0 V vs. anode
Pin 3	No-connect or tied to Pin 1	Internally unconnected; may be bonded to anode for mechanical stability but carries no electrical function

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-constrained PCB layouts without stability-compromising layout dependencies
Stable with capacitive loads	Supports direct connection to ADC reference inputs or op-amp feedback networks with up to 1 µF bypass capacitance
Sub-10 µs transient response	Allows use in time-multiplexed reference architectures where channel switching occurs at ≥50 kHz rates
Automotive temperature range	Validated operation from −55°C to +125°C meets AEC-Q100 stress test requirements for under-hood sensing
Rugged 200 mA surge tolerance	Withstands ESD and load-dump transients without latch-up or parametric shift in automotive power supply monitoring

Applications

Battery-Powered Portable Meters

Precision Data Acquisition Front-Ends

Use Scenario: Handheld multimeters and clamp meters operating from single-cell Li-ion or alkaline batteries with intermittent high-current display backlighting.

IC Role / Device Role / Timing Role: Shunt reference providing stable 5.0 V for 16-bit delta-sigma ADC and LCD bias generation.

Use Value: 60 µA minimum operating current extends battery life beyond 1000 hours in sleep mode; 2% initial tolerance avoids factory calibration.

Use Scenario: 8-channel industrial DAQ modules acquiring thermocouple, RTD, and strain gauge signals in DIN-rail mounted enclosures.

IC Role / Device Role / Timing Role: Primary reference for simultaneous-sampling SAR ADCs and excitation current sources.

Use Value: 20 ppm/°C TC and 0.33 Ω slope resistance limit channel-to-channel gain error to <0.05% over 0–70°C ambient range.

Automotive Cabin Temperature Sensors

Calibrated Power Supply Monitoring

Use Scenario: NTC-based cabin air temperature sensing nodes in HVAC control units exposed to −40°C cold cranking and +85°C dashboard thermal soak.

IC Role / Device Role / Timing Role: Reference for ratiometric bridge measurement of NTC voltage divider output.

Use Value: −55°C to +125°C rating and 40 ppm/°C max TC (−55°C to +125°C) ensure <±1.2°C absolute error without software compensation.

Use Scenario: Real-time monitoring of 12 V battery and 5 V logic rails in telematics control units during engine start-stop cycles.

IC Role / Device Role / Timing Role: Stable reference for comparator-based overvoltage/undervoltage detection circuitry.

Use Value: Sub-10 µs recovery from 12 V rail dip ensures no false trip during 50 ms cranking events; 25 mA absolute max rating handles transient surges.

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 output (2.5 V to 36 V), higher 2 mA min cathode current, 0.22 Ω typical dynamic impedance	Requires external resistor network for 5.0 V setting; less suitable for ultra-low-power sleep states	Prefer when design requires programmable reference or higher accuracy at >1 mA load
LM4040C50IDBZR	Fixed 5.0 V, SOT-23 package only, 20 ppm/°C TC, 65 µA min operating current	Lacks E-Line through-hole option; not rated for −55°C operation	Prefer when board space is constrained and automotive temp range is not required

Compared with TL431ACDR and LM4040C50IDBZR, ZR40402R50 uniquely combines through-hole E-Line packaging, −55°C capability, and 60 µA minimum operating current - making it optimal for legacy-replacement, high-reliability, and ultra-low-power industrial metering designs where SMT is impractical or extreme temperature resilience is mandatory.

Availability

ZR40402R50 is available at Aetrix Electronics and suitable for battery-powered portable equipment, precision data acquisition systems, automotive cabin sensors, and calibrated power supply monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ZR40402R50 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 devices for industrial, computing, consumer, and automotive markets.

ZR40402R50 belongs to the ZR4040 precision shunt reference product line, engineered for high-stability, low-power, and ruggedized applications in portable instrumentation, automotive sensing, and industrial process control where reliability under thermal and electrical stress is critical.

FAQ

Is ZR40402R50 a three-terminal device requiring external bias resistors?

No. ZR40402R50 is a two-terminal shunt reference: anode (Pin 1) connects to ground, cathode (Pin 2) connects to the supply or divider node being regulated. Pin 3 is non-functional and may be left unconnected or tied to Pin 1 per mechanical requirements. No external bias resistors are needed for basic operation.

Can ZR40402R50 replace ZR40402F50 in existing through-hole designs?

Yes - ZR40402R50 uses the E-Line (TO-92 compatible) package with axial leads, while ZR40402F50 uses SOT-23 surface-mount packaging. The electrical specifications (5.0 V ±2%, 20 ppm/°C TC, 60 µA–15 mA operating range) are identical. Mechanical redesign is required only for footprint and assembly method.

What is the maximum capacitive load ZR40402R50 can drive without oscillation?

The device is specified stable with capacitive loads up to 1 µF, as confirmed in the manufacturer's application note AN-4040. This allows direct connection to ADC reference inputs, op-amp feedback paths, and local decoupling without series isolation resistors or damping networks.

Does ZR40402R50 meet AEC-Q100 for automotive use?

While ZR40402R50 is qualified for the automotive temperature range (−55°C to +125°C) and features rugged 200 mA surge tolerance, it is not formally AEC-Q100 certified. For AEC-Q100-compliant alternatives, Diodes Incorporated offers the AP431x family with full qualification documentation.

ZR40402R50 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:: ±2%

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

ZR40402R50 FAQ

1.How can I place an order for ZR40402R50 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40402R50 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 ZR40402R50 reliable?

The price and inventory of ZR40402R50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40402R50 is usually 5 days.

3.What payment methods are accepted for ZR40402R50?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40402R50 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40402R50?

ZR40402R50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40402R50 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 ZR40402R50?

For technical support, including ZR40402R50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40402R50 requirements.

6.How does Aetrix verify that ZR40402R50 is sourced from the original manufacturer or authorized distributors?

All ZR40402R50 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 ZR40402R50 meets industry standards.

7.What is the process for return or replacement of ZR40402R50?

All ZR40402R50 units undergo pre-shipment inspection (PSI). If there is an issue with ZR40402R50, 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 ZR40402R50 part is unused and in its original packaging.

Return procedure for ZR40402R50:

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…