ZXRE4041ERSTZ Equivalent & Substitute Parts

Part Overview

The ZXRE4041ERSTZ is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 1.225V output with ±2% tolerance. This Surface Mount device in SOT-23-3 packaging is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across -40°C to 125°C and delivers 12 mA output current with 100 ppm/°C temperature coefficient.

Substiute Parts

ZXRE4041ERSTZ

Diodes IncorporatedIn Stock: 1084ZXRE4041ERSTZ 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 ZXRE4041ERSTZ is determined by the following critical parameters that must remain functionally equivalent:

• Fixed output voltage of 1.225V
• Output current capability of 12 mA minimum
• Shunt reference type architecture
• Temperature range compatibility with application requirements
• Compliance certifications (RoHS3, REACH Unaffected, EAR99)

The substitute parts identified—LM4041C12ILPR and LM4041D12ILPR—share the same core voltage reference architecture and output specifications. Both are manufactured by Texas Instruments and maintain the 1.225V fixed output with 12 mA current rating. These parts differ in tolerance specification and mounting technology (Through Hole vs. Surface Mount), which may require circuit board redesign considerations.

Parameter Comparison

Engineering Selection Recommendations

Both LM4041C12ILPR and LM4041D12ILPR are active products from Texas Instruments with full RoHS3 compliance and REACH Unaffected status, making them suitable for new designs and production continuity.

LM4041C12ILPR offers superior tolerance specification (±0.5%) and lower noise performance (20 µVrms), providing enhanced accuracy for precision reference applications. This part is recommended when tighter voltage regulation and lower noise requirements are critical to circuit performance.

LM4041D12ILPR provides ±1% tolerance with equivalent noise characteristics (20 µVrms), offering a balance between performance and cost. This part is suitable for applications where the ZXRE4041ERSTZ's ±2% tolerance is adequate.

Both substitute parts operate within the -40°C to 85°C temperature range, which is narrower than the original ZXRE4041ERSTZ (-40°C to 125°C). Applications requiring operation above 85°C require thermal analysis or alternative component selection.

The transition from Surface Mount (SOT-23-3) to Through Hole (TO-92-3) packaging necessitates circuit board redesign and assembly process modification.

Frequently Asked Questions (FAQ)

Q: Can LM4041C12ILPR or LM4041D12ILPR directly replace ZXRE4041ERSTZ without circuit modification?

A: Electrical substitution is possible due to identical output voltage (1.225V) and current rating (12 mA). However, the package change from SOT-23-3 (Surface Mount) to TO-92-3 (Through Hole) requires circuit board redesign and assembly process changes. Pin-to-pin electrical compatibility exists, but physical layout differs.

Q: What is the impact of the narrower operating temperature range (85°C vs. 125°C) on substitution?

A: Applications operating above 85°C ambient temperature cannot use LM4041C12ILPR or LM4041D12ILPR as direct substitutes. Verify maximum operating temperature requirements before selection. For high-temperature applications, alternative reference sources must be evaluated.

Q: How do tolerance differences affect circuit performance?

A: LM4041C12ILPR (±0.5%) and LM4041D12ILPR (±1%) provide tighter tolerance than ZXRE4041ERSTZ (±2%). This improves voltage regulation accuracy but does not create incompatibility. Applications designed for ±2% tolerance will function correctly with either substitute part.

Q: What is the significance of cathode current differences (30 µA vs. 80 µA)?

A: Higher cathode current in substitute parts (80 µA) increases power dissipation and bias network loading. Circuit designs must accommodate this parameter difference. Verify that existing bias resistor networks and power supply capacity support the higher cathode current requirement.

Q: Are both substitute parts suitable for new production designs?

A: Yes. Both LM4041C12ILPR and LM4041D12ILPR are active products with full compliance certifications (RoHS3, REACH Unaffected, EAR99). Either part is appropriate for new designs, with selection based on tolerance, noise, and packaging requirements.