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

Diodes Incorporated ZR40402R41

Name: ZR40402R41
Brand: Diodes Incorporated
SKU: ZR40402R41
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZR40402R41

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: ZR40402R41.pdf

Description:: IC VREF SHUNT 2% TO92

Quantity:: RFQ Add To RFQ list

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Inventory:3,373

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Product details

Overview

ZR40402R41 from Diodes Incorporated is a precision 4.1 V micropower shunt voltage reference in E-Line (TO-92) package, featuring 2% initial tolerance, 20 ppm/°C typical temperature coefficient, 0.55 Ω typical slope resistance, and stable operation from 60 µA to 15 mA - used as a low-drift reference in battery-powered instrumentation and crystal oscillator biasing.

For engineers reviewing the ZR40402R41 datasheet, ZR40402R41 pinout, ZR40402R41 application, or ZR40402R41 equivalent, key selection criteria include reverse breakdown voltage stability over −40°C to +85°C, capacitive-load immunity without external compensation, transient recovery in microseconds, and rugged 200 mA surge current capability.

Technical Context

The ZR40402R41 implements a bandgap-based shunt reference topology with inherent thermal compensation, delivering a fixed 4.1 V reverse breakdown voltage across its operating current range. Its low dynamic impedance (0.55 Ω typ.) and wideband noise of 90 µV(rms) support high-accuracy analog signal conditioning and ADC reference applications.

Designed for direct replacement of legacy two-terminal references, it operates stably without an external capacitor and maintains regulation under capacitive loads up to 10 nF. The device's 200 mA absolute maximum surge current rating enables robustness against line transients in portable power rails.

Key Specifications

Parameter	Value and Actual Design Meaning
V_R	4.1 V nominal reverse breakdown voltage, tightly controlled at 4.05–4.14 V (2% tol) at 150 µA test current
I_MIN	60 µA minimum operating current - enables ultra-low-power sleep-mode reference in battery systems
T_C	20 ppm/°C typical tempco - ensures ≤ ±1.6 mV drift over −40°C to +85°C for precision measurement
R_S	0.55 Ω typical slope resistance - minimizes output voltage shift under load current variation
I_R Range	60 µA to 15 mA recommended operating current - supports both micro-power sensing and higher-drive analog stages
EN	90 µV(rms) wideband noise (10 Hz–10 kHz) - suitable for 12-bit+ data acquisition front-ends
P_DISS	500 mW max at T_amb = 25°C (E-Line package) - allows safe operation at 4.1 V × 122 mA continuous

Pinout & Package

E-Line (TO-92) 3-pin through-hole package with reversed pinout: Pin 1 (anode), Pin 2 (cathode), Pin 3 (floating or internally connected to Pin 1 per datasheet Rev).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Connected to system ground or low-impedance return path; internal connection to Pin 3 in reversed configuration
Pin 2	Cathode	Reference output node - sinks current to establish 4.1 V across external resistor network
Pin 3	Internal Anode Tie	Floating or bonded to Pin 1; not externally usable as independent terminal

Key Features

Feature	Design Value
No external capacitor required	Guaranteed stability with capacitive loads up to 10 nF - eliminates BOM cost and layout area for decoupling cap
Microsecond-scale transient response	Stabilizes within <5 µs after current step - supports fast wake-up in duty-cycled sensor nodes
Rugged surge handling	Withstands 200 mA transient current - protects against ESD-induced current spikes on supply rails
Low quiescent current	Operates down to 60 µA - extends battery life in multi-year IoT endpoint deployments
Industrial temperature range	Full specification from −40°C to +85°C - validated for use in outdoor metering and factory-floor instrumentation

Applications

Battery-Powered Multimeters

Portable Gas Detectors

Use Scenario: Handheld digital multimeter requiring stable 4.1 V reference for 16-bit ADC scaling across 0–10 V input range.

IC Role / Device Role / Timing Role: Two-terminal shunt reference providing precise voltage threshold for analog-to-digital conversion.

Use Value: 20 ppm/°C tempco ensures ≤ ±0.02% full-scale error over operating temperature, meeting Class II accuracy standards.

Use Scenario: Low-power electrochemical gas sensor module powered by coin cell, operating intermittently to conserve energy.

IC Role / Device Role / Timing Role: Bias reference for sensor amplifier and ADC reference rail during active measurement cycles.

Use Value: 60 µA minimum operating current enables reliable startup from weak battery states (<2.8 V), extending usable battery life by >30%.

Crystal Oscillator Bias Networks

Industrial PLC Analog Input Modules

Use Scenario: Temperature-compensated crystal oscillator (TCXO) requiring low-noise, stable bias voltage for varactor tuning diode control.

IC Role / Device Role / Timing Role: Low-noise shunt reference supplying clean 4.1 V tuning voltage to oscillator core.

Use Value: 90 µV(rms) wideband noise prevents phase jitter degradation - critical for sub-100 fs RMS jitter performance.

Use Scenario: 4–20 mA loop-powered analog input card in programmable logic controller, needing calibrated reference for current-to-voltage conversion.

IC Role / Device Role / Timing Role: Precision voltage reference for op-amp feedback network in I/V converter stage.

Use Value: 0.55 Ω slope resistance limits reference voltage shift to <0.8 mV under 1.5 mA load variation - ensuring ±0.01% current measurement linearity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431ACLP	Adjustable 2.5 V reference (requires external resistors); 20 ppm/°C max tempco; 0.22 Ω typical R_S	Requires PCB space for two precision resistors; better R_S but higher min current (1 mA)	Prefer when adjustable output or lower R_S is critical; avoid in space-constrained or µA-bias designs
LM4040C41IDBZR	Fixed 4.096 V; SOT-23 package; 20 ppm/°C max tempco; 0.5 Ω R_S; 60 µA min current	Surface-mount only; tighter 0.5% initial tolerance; no through-hole option	Choose for automated assembly and higher accuracy; select ZR40402R41 when TO-92 mounting or cost-sensitive through-hole production is required

Compared with TL431ACLP and LM4040C41IDBZR, ZR40402R41 uniquely combines through-hole E-Line packaging, 2% tolerance, and guaranteed µA-level operation - making it optimal for legacy-replacement, serviceable, and low-volume industrial instrumentation where manual assembly or field repairability matters.

Availability

ZR40402R41 is available at Aetrix Electronics and suitable for battery-powered multimeters, portable gas detectors, and industrial PLC analog input modules requiring stable component supply with long-term manufacturability.

Supply support for ZR40402R41 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 power management, signal integrity, and protection applications.

The ZR4040 series belongs to Diodes' precision voltage reference product line, engineered specifically for low-power, high-stability shunt reference needs in portable, industrial, and instrumentation systems.

FAQ

What is the pin configuration for ZR40402R41 in the E-Line package?

ZR40402R41 uses a reversed E-Line (TO-92) pinout: Pin 1 is anode, Pin 2 is cathode (output), and Pin 3 is internally tied to Pin 1. This differs from standard TO-92 orientation and must be verified using the "Rev" marking on the device body per datasheet Figure 4-180.

Can ZR40402R41 operate without an external capacitor?

Yes - the ZR40402R41 is internally compensated and specified to remain stable without any external capacitor, even with capacitive loads up to 10 nF. This eliminates the need for additional decoupling components in space-constrained designs.

What is the maximum continuous reverse current ZR40402R41 can handle?

The recommended operating current is 60 µA to 15 mA, but the device is rated for continuous dissipation up to 500 mW in the E-Line package. At 4.1 V, this corresponds to ~122 mA continuous reverse current - well below the 200 mA absolute maximum surge rating.

How does temperature affect the output voltage of ZR40402R41?

ZR40402R41 exhibits a typical temperature coefficient of 20 ppm/°C, meaning its output voltage drifts approximately ±0.82 mV across the full −40°C to +85°C range. This is measured as (V_Rmax − V_Rmin) × 10⁶ / (V_R × ΔT), per datasheet definition.

ZR40402R41 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):: 4.096V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±2%

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:: TO-92

ZR40402R41 FAQ

1.How can I place an order for ZR40402R41 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZR40402R41 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 ZR40402R41 reliable?

The price and inventory of ZR40402R41 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZR40402R41 is usually 5 days.

3.What payment methods are accepted for ZR40402R41?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZR40402R41 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZR40402R41?

ZR40402R41 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZR40402R41 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 ZR40402R41?

For technical support, including ZR40402R41 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZR40402R41 requirements.

6.How does Aetrix verify that ZR40402R41 is sourced from the original manufacturer or authorized distributors?

All ZR40402R41 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 ZR40402R41 meets industry standards.

7.What is the process for return or replacement of ZR40402R41?

All ZR40402R41 units undergo pre-shipment inspection (PSI). If there is an issue with ZR40402R41, 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 ZR40402R41 part is unused and in its original packaging.

Return procedure for ZR40402R41:

1.Submit a request within 90 days.

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

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