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 ZR40401R41STZ

Name: ZR40401R41STZ
Brand: Diodes Incorporated
SKU: ZR40401R41STZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ZR40401R41STZ

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: E-Line-3

Datasheet:: ZR40401R41STZ.pdf

Description:: IC VREF SHUNT 1% E-LINE

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,084

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

Product details

Overview

ZR40401R41STZ from Diodes Incorporated is a precision micropower 4.1 V bandgap voltage reference in TO-92 package, designed as a two-terminal shunt reference with no external capacitor required, 1% initial tolerance, 20 ppm/°C typical temperature coefficient, and stable operation from 60 µA to 15 mA - used in battery-powered instrumentation and crystal oscillator biasing.

For engineers reviewing the ZR40401R41STZ datasheet, ZR40401R41STZ pinout, ZR40401R41STZ application, or ZR40401R41STZ equivalent, key selection criteria include shunt reference operating current range, TC performance across −40°C to +85°C, slope resistance under varying load current, noise floor (90 µV_rms), and ruggedness against transient currents up to 200 mA.

Technical Context

The ZR40401R41STZ operates as a two-terminal shunt voltage reference, sinking current through its cathode to maintain a precise 4.1 V reverse breakdown voltage. Its bandgap core delivers stable output without external compensation, and it remains functional with capacitive loads - eliminating need for output filtering in compact designs.

It exhibits low dynamic impedance (0.55 Ω typical slope resistance, 0.5–1.2 Ω dynamic impedance at 1 mA/100 Hz), fast settling (<5 µs transient response), and maintains regulation down to 25 µA minimum current while rated for continuous operation up to 15 mA and transient surges to 200 mA.

Key Specifications

Parameter	Value and Actual Design Meaning
V_R (Ref Voltage)	4.096 V nominal; 4.05–4.14 V (1% tolerance) at I_R = 150 µA - defines accuracy-critical bias point for ADC references or oscillator circuits.
Temp Coefficient (TC)	20 ppm/°C typical; ≤100 ppm/°C max over −40°C to +85°C - ensures <±1.7 mV drift across full industrial range.
Slope Resistance (R_S)	0.55 Ω typical; 0.55–2 Ω - determines output voltage shift per load current change (e.g., ±0.55 mV per 1 mA load variation).
Operating Current Range	60 µA min to 15 mA max - supports ultra-low-power sensor nodes and higher-current analog front-ends without external regulation.
Wideband Noise	90 µV_rms (10 Hz–10 kHz) at I_R = 1 mA - suitable for 12-bit+ data acquisition where reference noise contributes directly to system ENOB.
Transient Withstand	200 mA peak surge capability - enables robust operation in environments with ESD or supply-line transients without external protection.

Pinout & Package

Package: TO-92 (E-Line, 3-pin, reversed pinout - Pin 3 floating or connected to Pin 1 per datasheet revision).

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reference ground return path	Connected to system GND; completes shunt current loop - must be low-impedance for stable regulation.
Cathode (Pin 2)	Output voltage node	Provides regulated 4.1 V when reverse-biased; sinks all load + reference current - routed to high-impedance inputs (e.g., op-amp non-inverting input).
Pin 3	Internal connection to Pin 1	Electrically tied to Anode (Pin 1); may be left unconnected or bonded to Pin 1 - no independent function.

Key Features

Feature	Design Value
No external capacitor required	Enables direct integration into space-constrained PCB layouts (e.g., handheld meters) without stability-compensation components.
20 ppm/°C tempco (typ)	Meets industrial-grade accuracy requirements for portable test equipment operating across ambient temperature swings.
0.55 Ω slope resistance	Minimizes load-induced voltage error in multi-channel systems where reference current varies with channel count.
Stable with capacitive loads	Supports direct connection to crystal oscillator circuits or ADC sample-hold capacitors without oscillation risk.
200 mA transient rating	Eliminates need for series current-limiting resistors in applications exposed to ESD or hot-swap events.

Applications

Battery-Powered Instrumentation

Crystal Oscillator Biasing

Use Scenario: Handheld multimeter using 16-bit SAR ADC with internal reference buffer.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.1 V bias to ADC reference input and op-amp signal conditioning stages.

Use Value: 1% initial tolerance and 20 ppm/°C TC ensure measurement accuracy stays within ±0.1% over −10°C to +60°C operating range.

Use Scenario: Low-jitter 1 MHz crystal oscillator for MCU clock generation in portable medical device.

IC Role / Device Role / Timing Role: Biasing network element setting crystal drive level and sustaining amplifier operating point.

Use Value: Stable 4.1 V output with <90 µV_rms noise minimizes phase noise contribution to oscillator output jitter.

Precision Data Acquisition

Portable Test Equipment

Use Scenario: 8-channel thermocouple reader with cold-junction compensation and 24-bit delta-sigma ADC.

IC Role / Device Role / Timing Role: Primary reference for ADC and programmable gain amplifier calibration circuitry.

Use Value: Low 0.55 Ω slope resistance prevents channel-to-channel crosstalk via shared reference rail under varying PGA gain settings.

Use Scenario: Benchtop LCR meter requiring calibrated excitation voltage and measurement reference.

IC Role / Device Role / Timing Role: Reference source for DAC-controlled excitation generator and ADC digitization path.

Use Value: 15 mA max operating current supports simultaneous excitation and sensing circuitry without reference droop or thermal drift.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACDBZR	2.5 V nominal, adjustable via resistor divider; 2% initial tol; 50 ppm/°C TC; requires external resistors for 4.1 V setup.	Used where programmability or higher current (>100 mA) is needed; less accurate for fixed 4.1 V use.	Select if system already uses TL431-based feedback and needs minimal BOM change - not drop-in for ZR40401R41STZ's fixed 4.1 V and low-noise profile.
REF43 4.096V (REF43G)	4.096 V fixed, 0.05% max initial tol, 3 ppm/°C TC, 3.5 µV_p-p noise; requires 100 nF bypass capacitor.	Targeted at high-precision metrology; higher cost and board area vs. ZR40401R41STZ.	Choose only when sub-ppm TC and microvolt-level noise are mandatory - otherwise ZR40401R41STZ offers optimal balance of cost, size, and 12-bit+ performance.

Compared with TL431ACDBZR and REF43G, ZR40401R41STZ provides fixed 4.1 V output with no external components, lower cost, and sufficient accuracy/noise for industrial portable equipment - while avoiding TL431's adjustment complexity and REF43's capacitor dependency and premium pricing.

Availability

ZR40401R41STZ is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition systems, and portable test equipment requiring stable component supply with consistent parametric performance across production lots.

Supply support for ZR40401R41STZ 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, cost-optimized components for industrial, computing, and consumer markets.

The ZR4040 series belongs to Diodes' precision voltage reference product line, engineered specifically for space-constrained, low-power applications demanding stable shunt reference performance without external compensation.

FAQ

What is the minimum operating current for reliable regulation?

The ZR40401R41STZ achieves stable regulation at 60 µA minimum cathode current, verified across −40°C to +85°C. Below this, output voltage deviates nonlinearly; design margin recommends ≥100 µA for guaranteed 1% accuracy over temperature.

Can it drive a 10 nF capacitive load without oscillation?

Yes - the ZR40401R41STZ is explicitly characterized as stable with capacitive loads, including 10 nF, per datasheet Figure 4-179 transient response plots and "stable with capacitive loads" feature statement. No series resistor or isolation is required.

Is the TO-92 package lead-free and RoHS compliant?

Yes - the ZR40401R41STZ TO-92 package meets RoHS Directive 2011/65/EU and is lead-free, with matte tin-plated leads. Diodes Incorporated part marking "STZ" denotes RoHS-compliant packaging per their standard ordering nomenclature.

How does its 200 mA transient rating translate to real-world robustness?

The 200 mA rating reflects short-duration (≤10 µs), non-repetitive surge capability validated under ABSOLUTE MAXIMUM RATING testing. It allows the device to survive ESD events (IEC 61000-4-2 Level 4) and power-rail transients without latch-up or parameter shift - confirmed by Diodes' reliability report ZR4040-4.1 Rev. 4.

ZR40401R41STZ Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: E-Line-3

Series:: -

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 4.096V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±1%

Temperature Coefficient:: 100ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 90µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 60 µA

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: E-Line (TO-92 compatible)

ZR40401R41STZ FAQ

1.How can I place an order for ZR40401R41STZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40401R41STZ 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 ZR40401R41STZ reliable?

The price and inventory of ZR40401R41STZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40401R41STZ is usually 5 days.

3.What payment methods are accepted for ZR40401R41STZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40401R41STZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40401R41STZ?

ZR40401R41STZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40401R41STZ 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 ZR40401R41STZ?

For technical support, including ZR40401R41STZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40401R41STZ requirements.

6.How does Aetrix verify that ZR40401R41STZ is sourced from the original manufacturer or authorized distributors?

All ZR40401R41STZ 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 ZR40401R41STZ meets industry standards.

7.What is the process for return or replacement of ZR40401R41STZ?

All ZR40401R41STZ units undergo pre-shipment inspection (PSI). If there is an issue with ZR40401R41STZ, 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 ZR40401R41STZ part is unused and in its original packaging.

Return procedure for ZR40401R41STZ:

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…