ZXRE4041FRSTOB Equivalent & Substitute Parts

Part Overview

The ZXRE4041FRSTOB is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 1.225V output with ±3% tolerance. This through-hole component operates across -40°C to 125°C and delivers 12 mA output current, making it suitable for precision voltage reference applications in power management circuits.

The ZXRE4041FRSTOB has reached obsolete product status. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

ZXRE4041FRSTOB

Diodes IncorporatedIn Stock: 797ZXRE4041FRSTOB 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 eligibility for the ZXRE4041FRSTOB is determined by the following critical parameters:

Core Electrical Compatibility:

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

Acceptable Parameter Variations:

• Tolerance: The ZXRE4041FRSTOB specifies ±3%. Substitute parts with equal or tighter tolerance (±0.5%, ±1%) are functionally compatible and represent performance improvements.
• Temperature Coefficient: Substitute parts with 100ppm/°C or 150ppm/°C are acceptable.
• Noise Performance: Lower noise specifications in substitutes are acceptable.
• Cathode Current: Variations from 30 µA to 80 µA are within acceptable operating margins.
• Operating Temperature Range: Substitute parts rated to -40°C to 85°C cover the primary operating window of the original part.
• Package Compatibility: TO-92-3 (TO-226AA) formed leads are mechanically and electrically compatible with E-Line-3 through-hole footprints.

Parameter Comparison

Engineering Selection Recommendations

Both LM4041C12ILPR and LM4041D12ILPR are active, in-stock alternatives to the obsolete ZXRE4041FRSTOB. Both substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

LM4041C12ILPR offers the tightest tolerance specification at ±0.5%, with improved noise performance (20µVrms versus 60µVrms). This part is suitable for applications requiring enhanced voltage reference accuracy.

LM4041D12ILPR provides ±1% tolerance with equivalent noise performance to the LM4041C12ILPR. This part represents a balanced alternative with slightly relaxed tolerance specifications.

Both substitute parts are rated to -40°C to 85°C, which covers the primary operating range of the original ZXRE4041FRSTOB. Applications requiring operation above 85°C should evaluate thermal management or alternative reference architectures.

Frequently Asked Questions (FAQ)

Q: Can LM4041C12ILPR or LM4041D12ILPR be used as direct replacements for ZXRE4041FRSTOB?

A: Yes. Both parts share identical output voltage (1.225V), output current (12 mA), and shunt reference topology. The TO-92-3 package is mechanically and electrically compatible with the E-Line-3 through-hole footprint. Electrical performance is equivalent or superior due to tighter tolerance and lower noise specifications.

Q: What is the difference between LM4041C12ILPR and LM4041D12ILPR?

A: The primary difference is tolerance specification. LM4041C12ILPR is specified at ±0.5%, while LM4041D12ILPR is specified at ±1%. Both parts have identical noise performance (20µVrms) and temperature coefficient ranges suitable for the original application. Selection depends on the precision requirements of the end application.

Q: Are there temperature range limitations with the substitute parts?

A: Both substitute parts are rated to -40°C to 85°C, compared to the original part's -40°C to 125°C range. For applications operating above 85°C, thermal management strategies or alternative reference designs should be evaluated.

Q: Do the substitute parts maintain regulatory compliance?

A: Yes. Both LM4041C12ILPR and LM4041D12ILPR are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original ZXRE4041FRSTOB.

Q: What is the impact of increased cathode current in the substitute parts?

A: The substitute parts specify 80 µA cathode current versus 30 µA for the original part. This represents a higher quiescent current draw but remains within acceptable operating margins for most voltage reference applications. Circuit design should account for this increased current in power budget calculations.