ZXRE4041ERSTOB Equivalent & Substitute Parts

Part Overview

The ZXRE4041ERSTOB is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 1.225V output with ±2% tolerance. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across an industrial temperature range of -40°C to 125°C and is packaged in an E-Line (TO-92 compatible) configuration with through-hole mounting.

Substiute Parts

ZXRE4041ERSTOB

Diodes IncorporatedIn Stock: 1188ZXRE4041ERSTOB Datasheet

Current PartRFQ

LM4041C12ILPR

Texas InstrumentsIn Stock: 3582LM4041C12ILPR Datasheet

MFR RecommendedRFQ

LM4041D12ILPR

Texas InstrumentsIn Stock: 3173LM4041D12ILPR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ZXRE4041ERSTOB is determined by the following critical parameters:

Core Electrical Compatibility:

• Fixed output voltage of 1.225V
• Output current capability of 12 mA
• Shunt reference type
• Through-hole mounting configuration

Acceptable Variation Parameters:

• Tolerance: The ZXRE4041ERSTOB specifies ±2%. Substitute parts with equal or tighter tolerance (±0.5%, ±1%) are functionally compatible and represent performance improvements.
• Temperature Coefficient: Substitute parts may have different temperature coefficients (100ppm/°C or 150ppm/°C) while maintaining functional equivalence.
• Noise Performance: Substitute parts with lower noise specifications (20µVrms vs. 60µVrms) provide enhanced performance.
• Cathode Current: Variation from 30 µA to 80 µA is acceptable within shunt reference design parameters.
• Operating Temperature Range: Substitute parts rated to -40°C to 85°C cover the primary industrial operating window, though the original part extends to 125°C.

Package Compatibility: Both substitute parts use TO-92-3 (TO-226AA) formed leads packaging, which is mechanically and electrically compatible with the E-Line-3 configuration.

Parameter Comparison

Engineering Selection Recommendations

LM4041C12ILPR (Texas Instruments) is the primary substitute for applications requiring the highest precision. This part offers ±0.5% tolerance with 20µVrms noise performance, representing a significant improvement over the original ZXRE4041ERSTOB specification. The part maintains active product status with full ROHS3 compliance. The operating temperature range extends to 85°C, which covers standard industrial applications. This substitute is suitable for precision analog circuits where voltage reference accuracy is critical.

LM4041D12ILPR (Texas Instruments) serves as an alternative substitute with ±1% tolerance, providing a balance between performance and cost. This part also delivers 20µVrms noise performance and maintains active product status. The temperature coefficient of 150ppm/°C is slightly higher than the original part, though this remains within acceptable parameters for most applications. This substitute is appropriate for general-purpose voltage reference applications where moderate precision is required.

Both substitute parts are manufactured by Texas Instruments, an established supplier with consistent product availability and support. The transition from the obsolete ZXRE4041ERSTOB to either LM4041 variant ensures continued access to functionally equivalent shunt voltage reference components.

Frequently Asked Questions (FAQ)

Q: Can LM4041C12ILPR and LM4041D12ILPR be used interchangeably with ZXRE4041ERSTOB?

A: Yes, both parts are functionally equivalent substitutes. The primary differences are tolerance (±0.5% and ±1% respectively, versus ±2% for the original) and temperature coefficient specifications. Both maintain the same 1.225V output voltage, 12 mA output current, and through-hole package configuration.

Q: What is the impact of the different operating temperature ranges?

A: The ZXRE4041ERSTOB operates to 125°C, while both LM4041 variants operate to 85°C. For applications requiring operation above 85°C, the original part specification must be maintained. For standard industrial applications operating within -40°C to 85°C, the LM4041 variants are fully compatible.

Q: How do the tolerance differences affect circuit design?

A: The LM4041C12ILPR (±0.5%) provides tighter voltage regulation than the original ±2% specification, improving overall circuit accuracy. The LM4041D12ILPR (±1%) offers intermediate precision. Applications designed for the original ±2% tolerance will function correctly with either substitute, as both provide equal or better performance.

Q: Are the package configurations mechanically compatible?

A: Yes. The E-Line-3 and TO-92-3 (TO-226AA) packages are mechanically and electrically compatible through-hole configurations. Direct board-level substitution is possible without PCB redesign.

Q: What is the significance of the lower noise specification in the LM4041 variants?

A: The LM4041 parts specify 20µVrms noise (10Hz to 10kHz) compared to 60µVrms for the ZXRE4041ERSTOB. This represents improved noise performance, beneficial for sensitive analog applications. Applications designed for the original 60µVrms specification will experience improved performance with the lower-noise substitutes.

Q: Are both substitute parts RoHS compliant?

A: Yes, both LM4041C12ILPR and LM4041D12ILPR are ROHS3 compliant, matching the compliance status of the original ZXRE4041ERSTOB.