ZXRE4041FFTA Equivalent & Substitute Parts

Part Overview

The ZXRE4041FFTA is a shunt voltage reference IC manufactured by Diodes Incorporated, providing a fixed 1.225V output with ±3% tolerance in a SOT-23-3 surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part delivers 12 mA output current with a temperature coefficient of 100ppm/°C and operates across the industrial temperature range of -40°C to 125°C.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Fixed
Voltage - Output (Min/Fixed)	1.225V
Current - Output	12 mA
Tolerance	±3%
Temperature Coefficient	100ppm/°C
Noise - 10Hz to 10kHz	60µVrms
Current - Cathode	30 µA
Operating Temperature	-40°C ~ 125°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 of the ZXRE4041FFTA is determined by the following critical parameters: fixed output voltage of 1.225V, SOT-23-3 package compatibility, shunt reference type, and surface mount technology. All substitute parts must maintain the same output voltage and package form factor to ensure direct replacement capability.

The substitute parts are grouped into two categories based on tolerance specifications:

Category A - Enhanced Tolerance (±0.1%): LM4041A12IDBZR, LM4041A12IDBZT, LM4041AEM3-1.2+T, LM4041AIM3-1.2+T, LM4041AIM3-1.2/NOPB, and LM4041AIM3X-1.2/NOPB. These parts offer superior accuracy compared to the original ±3% specification.

Category B - Moderate Tolerance (±0.2%): LM4041B12IDBZR, LM4041B12IDBZT, LM4041BEM3-1.2+T, and LM4041BIM3-1.2+T. These parts provide tighter tolerance than the original while maintaining cost-effectiveness.

All substitute parts are manufactured by Texas Instruments or Analog Devices Inc./Maxim Integrated, carry active product status, and comply with ROHS3 and REACH requirements.

Parameter Comparison

Parameter	ZXRE4041FFTA	LM4041A12IDBZR	LM4041A12IDBZT	LM4041AEM3-1.2+T	LM4041AIM3-1.2+T	LM4041AIM3-1.2/NOPB	LM4041AIM3X-1.2/NOPB	LM4041B12IDBZR	LM4041B12IDBZT	LM4041BEM3-1.2+T	LM4041BIM3-1.2+T
Voltage - Output (Min/Fixed)	1.225V	1.225V	1.225V	1.225V	1.225V	1.225V	1.225V	1.225V	1.225V	1.225V	1.225V
Current - Output	12 mA	12 mA	12 mA	12 mA	20 mA	12 mA	12 mA	12 mA	12 mA	Not Specified	20 mA
Tolerance	±3%	±0.1%	±0.1%	±0.1%	±0.1%	±0.1%	±0.1%	±0.2%	±0.2%	Not Specified	±0.2%
Temperature Coefficient	100ppm/°C	100ppm/°C	100ppm/°C	100ppm/°C	100ppm/°C	100ppm/°C	100ppm/°C	100ppm/°C	100ppm/°C	Not Specified	100ppm/°C
Noise - 10Hz to 10kHz	60µVrms	20µVrms	20µVrms	20µVrms	20µVrms	20µVrms	20µVrms	20µVrms	20µVrms	Not Specified	20µVrms
Current - Cathode	30 µA	80 µA	80 µA	60 µA	60 µA	65 µA	65 µA	80 µA	80 µA	Not Specified	60 µA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	Not Specified	-40°C ~ 85°C
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain the critical 1.225V fixed output voltage and SOT-23-3 package compatibility required for direct replacement of the ZXRE4041FFTA. The primary distinction among substitutes is tolerance specification and operating temperature range.

For applications requiring extended temperature operation to 125°C, select LM4041AEM3-1.2+T, which maintains the full -40°C to 125°C range while offering ±0.1% tolerance and ROHS3 compliance.

For standard industrial applications operating within -40°C to 85°C, the LM4041A series (±0.1% tolerance) and LM4041B series (±0.2% tolerance) provide active product status with full compliance certifications. LM4041A12IDBZR and LM4041A12IDBZT are available in high inventory quantities, supporting production continuity.

All substitute parts carry ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original component.

Frequently Asked Questions (FAQ)

Q: Can LM4041A and LM4041B series parts directly replace the ZXRE4041FFTA?

A: Yes. All listed substitutes maintain the identical 1.225V output voltage and SOT-23-3 package form factor, enabling direct pin-compatible replacement. The primary differences are tolerance specifications and operating temperature ranges, which must be evaluated against application requirements.

Q: What is the impact of tolerance differences between ±3% and ±0.1%?

A: The ZXRE4041FFTA specifies ±3% tolerance, while LM4041A series parts specify ±0.1%. This represents a 30-fold improvement in output voltage accuracy. Applications sensitive to reference voltage precision benefit from the tighter tolerance, while applications with relaxed accuracy requirements can use either specification.

Q: Are there temperature range limitations with substitute parts?

A: Most substitute parts operate from -40°C to 85°C, matching the ZXRE4041FFTA's lower temperature limit but not extending to 125°C. LM4041AEM3-1.2+T extends to 125°C. Verify application temperature requirements before selection.

Q: What packaging options are available for substitutes?

A: Substitute parts are available in Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) configurations. All maintain the SOT-23-3 surface mount package. Verify packaging requirements for your procurement and assembly processes.

Q: Do all substitutes meet compliance requirements?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original ZXRE4041FFTA.

Q: What is the difference between cathode current specifications?

A: Cathode current varies among substitutes (60 µA to 80 µA) compared to the original 30 µA. This parameter affects circuit biasing and power consumption. Verify compatibility with your reference circuit design.

Q: Which substitute offers the best availability?

A: LM4041BEM3-1.2+T shows the highest inventory at 25,100 pieces. LM4041A12IDBZR and LM4041A12IDBZT also maintain substantial stock levels (88,624 and 12,650 pieces respectively), supporting production requirements.

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