Equivalent & Substitute Parts for ZR40401F41TC

Part Overview

The ZR40401F41TC is a shunt voltage reference IC manufactured by Diodes Incorporated, providing a fixed 4.096V output with ±1% tolerance in a SOT-23-3 surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part delivers 15 mA output current with a temperature coefficient of 100ppm/°C and operates across the industrial temperature range of -40°C to 85°C.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	4.096V
Current - Output	15 mA
Tolerance	±1%
Temperature Coefficient	100ppm/°C
Noise - 10Hz to 10kHz	90µVrms
Current - Cathode	60 µA
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the ZR40401F41TC is determined by the following critical parameters:

Fixed output voltage of 4.096V
Output current capability of 15 mA
Tolerance of ±1% or better
SOT-23-3 package compatibility
Surface mount mounting type
Operating temperature range of -40°C to 85°C minimum
ROHS3 compliance and MSL 1 rating

Substitute parts are grouped into three categories based on their relationship to the main part:

Parametric Equivalent: ZR40401F41TA differs only in packaging format (Tape & Reel vs. bulk), maintaining identical electrical specifications and product status classification.

Direct Manufacturer Equivalents: Texas Instruments LM4040 series parts (LM4040D41IDBZR, LM4040D41IDBZT, LM4040DIM3-4.1/NOPB, LM4040DIM3X-4.1/NOPB) and Microchip Technology LM4040DYM3-4.1-TR provide functionally equivalent performance with active product status. These parts maintain the same output voltage, current, tolerance, and package specifications.

Upgrade Options: LM4040DEM3-4.1+T (Analog Devices/Maxim) extends the operating temperature range to -40°C to 125°C and includes automotive qualification (AEC-Q100). ADR5044 series parts (ADR5044ARTZ-REEL7, ADR5044BRTZ-REEL7, ADR5044BRTZ-R2) offer improved tolerance specifications (±0.2% to ±0.1%) and lower temperature coefficients (75ppm/°C to 100ppm/°C), with extended temperature range support to 125°C.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Output	Current - Output	Tolerance	Temperature Coefficient	Noise - 10Hz to 10kHz	Current - Cathode	Operating Temperature	Product Status	Packaging
ZR40401F41TC	Diodes Incorporated	4.096V	15 mA	±1%	100ppm/°C	90µVrms	60 µA	-40°C ~ 85°C	Obsolete	Bulk
ZR40401F41TA	Diodes Incorporated	4.096V	15 mA	±1%	100ppm/°C	90µVrms	60 µA	-40°C ~ 85°C	Last Time Buy	Tape & Reel
LM4040D41IDBZR	Texas Instruments	4.096V	15 mA	±1%	150ppm/°C	80µVrms	88 µA	-40°C ~ 85°C	Active	Cut Tape
LM4040D41IDBZT	Texas Instruments	4.096V	15 mA	±1%	150ppm/°C	80µVrms	88 µA	-40°C ~ 85°C	Active	Tape & Reel
LM4040DIM3-4.1/NOPB	Texas Instruments	4.096V	15 mA	±1%	150ppm/°C	80µVrms	78 µA	-40°C ~ 85°C	Active	Cut Tape
LM4040DIM3X-4.1/NOPB	Texas Instruments	4.096V	15 mA	±1%	150ppm/°C	80µVrms	78 µA	-40°C ~ 85°C	Active	Tape & Reel
LM4040DYM3-4.1-TR	Microchip Technology	4.096V	15 mA	±1%	150ppm/°C	80µVrms	78 µA	-40°C ~ 85°C	Active	Cut Tape
LM4040DEM3-4.1+T	Analog Devices Inc./Maxim Integrated	4.096V	15 mA	±1%	150ppm/°C	64µVrms	78 µA	-40°C ~ 125°C	Active	Tape & Reel
ADR5044ARTZ-REEL7	Analog Devices Inc.	4.096V	15 mA	±0.2%	100ppm/°C	240µVrms	60 µA	-40°C ~ 125°C	Active	Cut Tape
ADR5044BRTZ-R2	Analog Devices Inc.	4.096V	15 mA	±0.1%	75ppm/°C	240µVrms	60 µA	-40°C ~ 125°C	Discontinued at DiGi Electronics	Bulk
ADR5044BRTZ-REEL7	Analog Devices Inc.	4.096V	15 mA	±0.1%	75ppm/°C	240µVrms	60 µA	-40°C ~ 125°C	Active	Cut Tape

Engineering Selection Recommendations

For Direct Replacement (Obsolete Product Continuity): ZR40401F41TA serves as the parametric equivalent with identical electrical specifications. This part maintains Last Time Buy status, providing a transition path for existing designs. Texas Instruments LM4040 series parts (LM4040D41IDBZR, LM4040D41IDBZT, LM4040DIM3-4.1/NOPB, LM4040DIM3X-4.1/NOPB) and Microchip Technology LM4040DYM3-4.1-TR are active products with equivalent performance and ROHS3 compliance, suitable for immediate production use.

For Extended Temperature Range Applications: LM4040DEM3-4.1+T extends the operating temperature to -40°C to 125°C and includes AEC-Q100 automotive qualification, supporting designs requiring wider thermal operating windows or automotive-grade reliability.

For Improved Tolerance and Stability: ADR5044ARTZ-REEL7 and ADR5044BRTZ-REEL7 offer superior tolerance specifications (±0.2% and ±0.1% respectively) with lower temperature coefficients (100ppm/°C and 75ppm/°C). These parts support -40°C to 125°C operation and maintain ROHS3 compliance. ADR5044BRTZ-R2 is discontinued at DiGi Electronics and should not be selected for new designs.

All recommended substitutes maintain SOT-23-3 package compatibility, surface mount mounting type, MSL 1 rating, and ROHS3 compliance with the original part.

Frequently Asked Questions (FAQ)

Q: Can I use LM4040 series parts as direct replacements for ZR40401F41TC? A: Yes. LM4040D41IDBZR, LM4040D41IDBZT, LM4040DIM3-4.1/NOPB, LM4040DIM3X-4.1/NOPB, and LM4040DYM3-4.1-TR maintain the same 4.096V output, 15 mA current, ±1% tolerance, and SOT-23-3 package. These parts are active products with ROHS3 compliance. Minor differences include slightly higher temperature coefficients (150ppm/°C vs. 100ppm/°C) and cathode current variations (78-88 µA vs. 60 µA), which are within acceptable substitution parameters for most applications.

Q: What is the difference between packaging options (Cut Tape vs. Tape & Reel)? A: Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) packaging formats differ in delivery method and handling. Both formats contain identical components in SOT-23-3 packages. Selection depends on production volume and assembly line requirements. Bulk packaging is used for lower-volume applications.

Q: Are ADR5044 parts suitable replacements? A: ADR5044 series parts are upgrade options offering improved tolerance (±0.2% to ±0.1%) and extended temperature range (-40°C to 125°C). They maintain the same 4.096V output, 15 mA current, and SOT-23-3 package. These parts are compatible with ZR40401F41TC designs but provide enhanced performance specifications. ADR5044BRTZ-R2 is discontinued and should not be used for new designs.

Q: Does the temperature coefficient difference affect circuit performance? A: The ZR40401F41TC has a 100ppm/°C temperature coefficient, while most LM4040 alternatives have 150ppm/°C. This represents a 50% increase in temperature-induced drift. For applications with tight voltage stability requirements across temperature ranges, ADR5044 series parts with 75-100ppm/°C coefficients provide superior performance.

Q: Are all substitute parts ROHS3 compliant? A: All recommended substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original ZR40401F41TC specifications.

Q: Which part has the lowest noise performance? A: LM4040DEM3-4.1+T provides the lowest 10Hz to 10kHz noise at 64µVrms, compared to 90µVrms for the original part. ADR5044 series parts specify 240µVrms noise, which is higher but acceptable for most reference applications.

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