ZXRE4041DR Equivalent & Substitute Parts

Part Overview

The ZXRE4041DR is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 1.225V output with ±1% tolerance. This through-hole TO-92 package component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The device operates across the industrial temperature range of -40°C to 125°C and delivers 12 mA output current with 100 ppm/°C temperature coefficient.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Voltage (Fixed)	1.225V
Output Current	12 mA
Voltage Tolerance	±1%
Temperature Coefficient	100 ppm/°C
Noise (10Hz to 10kHz)	60 µVrms
Cathode Current	30 µA
Operating Temperature	-40°C to 125°C
Mounting Type	Through Hole
Package	TO-92-3
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the ZXRE4041DR is determined by the following critical parameters: fixed output voltage of 1.225V, output current of 12 mA, reference type (shunt), and mounting configuration. The substitute parts are grouped into two categories based on packaging and electrical performance characteristics:

Category 1: Surface Mount Alternative The ZXRE4041DFTA provides identical electrical specifications in SOT-23-3 surface mount packaging, enabling modernization to surface mount assembly processes while maintaining the same voltage reference performance.

Category 2: Through-Hole Alternatives (Texas Instruments LM4041 Series) Multiple LM4041 variants maintain the TO-92-3 through-hole package and 1.225V fixed output, with variations in tolerance grades (±0.1%, ±0.2%, ±0.5%, ±1%), temperature coefficients, and cathode current specifications. These parts are selected based on tolerance requirements and operating temperature range compatibility.

Parameter Comparison

Part Number	Manufacturer	Package	Mounting	Output Voltage	Tolerance	Temp Coeff	Cathode Current	Temp Range	Status
ZXRE4041DR	Diodes Inc.	TO-92-3	Through Hole	1.225V	±1%	100 ppm/°C	30 µA	-40 to 125°C	Obsolete
ZXRE4041DFTA	Diodes Inc.	SOT-23-3	Surface Mount	1.225V	±1%	100 ppm/°C	30 µA	-40 to 125°C	Active
LM4041AIZ-1.2/NOPB	Texas Instruments	TO-92-3	Through Hole	1.225V	±0.1%	100 ppm/°C	65 µA	-40 to 85°C	Active
LM4041BIZ-1.2/NOPB	National Semiconductor	TO-92-3	Through Hole	1.225V	±0.2%	100 ppm/°C	65 µA	-40 to 85°C	Active
LM4041C12ILP	Texas Instruments	TO-92-3	Through Hole	1.225V	±0.5%	100 ppm/°C	80 µA	-40 to 85°C	Active
LM4041CIZ-1.2/NOPB	Texas Instruments	TO-92-3	Through Hole	1.225V	±0.5%	100 ppm/°C	65 µA	-40 to 85°C	Active
LM4041D12ILP	Texas Instruments	TO-92-3	Through Hole	1.225V	±1%	150 ppm/°C	80 µA	-40 to 85°C	Active
LM4041D12ILPE3	Texas Instruments	TO-92-3	Through Hole	1.225V	±1%	150 ppm/°C	80 µA	-40 to 85°C	Obsolete
LM4041DIZ-1.2/NOPB	Texas Instruments	TO-92-3	Through Hole	1.225V	±1%	150 ppm/°C	70 µA	-40 to 85°C	Active

Engineering Selection Recommendations

For Direct Replacement (Same Tolerance, Through-Hole Package) LM4041D12ILP and LM4041DIZ-1.2/NOPB are active production alternatives maintaining ±1% tolerance and TO-92-3 through-hole packaging. Both are ROHS3 compliant. LM4041DIZ-1.2/NOPB is preferred due to active product status and lower cathode current (70 µA vs. 80 µA). Note that operating temperature range is reduced to -40°C to 85°C compared to the original -40°C to 125°C specification.

For Enhanced Tolerance Requirements LM4041AIZ-1.2/NOPB provides ±0.1% tolerance with active status and ROHS3 compliance, suitable for applications requiring tighter voltage accuracy. LM4041BIZ-1.2/NOPB offers ±0.2% tolerance as an intermediate option. Both operate within -40°C to 85°C range.

For Surface Mount Assembly ZXRE4041DFTA maintains Diodes Incorporated manufacturing with identical electrical specifications (±1%, 100 ppm/°C) and extended temperature range (-40°C to 125°C), enabling transition to surface mount processes while preserving performance characteristics.

Avoid Obsolete Parts LM4041D12ILPE3 is marked obsolete and should not be selected for new designs despite technical compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use LM4041AIZ-1.2/NOPB as a direct replacement for ZXRE4041DR? A: Yes, electrically compatible. Both deliver 1.225V at 12 mA with TO-92-3 through-hole packaging. LM4041AIZ-1.2/NOPB offers superior ±0.1% tolerance versus ±1%. Operating temperature range is reduced from -40°C to 125°C to -40°C to 85°C; verify this meets your application requirements.

Q: What is the difference between LM4041D12ILP and LM4041DIZ-1.2/NOPB? A: Both are ±1% tolerance, TO-92-3 through-hole, 1.225V fixed output with active status. Primary difference is cathode current: LM4041D12ILP draws 80 µA while LM4041DIZ-1.2/NOPB draws 70 µA. Select based on bias current budget requirements.

Q: Can I switch to surface mount packaging? A: Yes. ZXRE4041DFTA provides identical electrical performance in SOT-23-3 surface mount package with extended temperature range (-40°C to 125°C). This requires PCB redesign and assembly process changes.

Q: Why do some substitutes have different temperature coefficients? A: LM4041 D-grade variants specify 150 ppm/°C versus the original 100 ppm/°C. This affects voltage stability across temperature extremes. Select based on your application's temperature stability requirements.

Q: Are all substitute parts RoHS3 compliant? A: All listed active production parts are ROHS3 compliant. Verify compliance documentation for your specific procurement source.

Q: What is the minimum cathode current requirement? A: The original ZXRE4041DR specifies 30 µA minimum cathode current. All LM4041 substitutes require higher cathode current (65-80 µA). Ensure your circuit bias network can supply this current.

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