ZR40402R41STZ Equivalent & Substitute Parts

Part Overview

The ZR40402R41STZ is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 4.096V 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 the industrial temperature range of -40°C to 85°C and is suitable for applications requiring precision voltage reference functionality in through-hole configurations.

Substiute Parts

ZR40402R41STZ

Diodes IncorporatedIn Stock: 1173ZR40402R41STZ Datasheet

Current PartRFQ

LM4040C41ILPR

Texas InstrumentsIn Stock: 2736LM4040C41ILPR Datasheet

MFR RecommendedRFQ

LM4040D41ILPR

Texas InstrumentsIn Stock: 2716LM4040D41ILPR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ZR40402R41STZ is determined by the following critical parameters that must remain consistent:

• Output Voltage: 4.096V fixed output (non-negotiable)
• Output Current: 15 mA capability
• Reference Type: Shunt configuration
• Mounting Type: Through Hole
• Package Compatibility: TO-92-3 or E-Line equivalent form factors
• Operating Temperature Range: -40°C to 85°C minimum
• Compliance: ROHS3 and REACH requirements

The substitute parts identified (LM4040C41ILPR and LM4040D41ILPR) maintain these core electrical and mechanical specifications. Variations in tolerance, temperature coefficient, and noise characteristics are secondary parameters that may be improved in substitute options while maintaining functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Both LM4040C41ILPR and LM4040D41ILPR are active, production-supported alternatives to the obsolete ZR40402R41STZ. Selection between these options depends on application-specific tolerance and temperature stability requirements:

LM4040C41ILPR offers superior tolerance performance at ±0.5%, making it suitable for applications requiring tighter voltage reference accuracy. This part maintains the same temperature coefficient as the original part (100 ppm/°C) and provides lower noise characteristics (80 µVrms).

LM4040D41ILPR provides a mid-range tolerance of ±1% with a slightly higher temperature coefficient (150 ppm/°C). This option remains fully compliant with ROHS3 and REACH requirements and is suitable for applications where the original ±2% tolerance specification is acceptable.

Both substitute parts are ROHS3 compliant and REACH unaffected, ensuring regulatory compliance for current manufacturing standards. The TO-92-3 package form factor is mechanically compatible with the original E-Line-3 configuration for through-hole mounting applications.

Frequently Asked Questions (FAQ)

Q: Can LM4040C41ILPR or LM4040D41ILPR be used as direct replacements for ZR40402R41STZ?

A: Yes. Both parts maintain the critical electrical specifications: 4.096V fixed output, 15 mA output current, shunt reference type, and -40°C to 85°C operating range. The TO-92-3 package is mechanically compatible with the original E-Line-3 through-hole configuration.

Q: What is the difference between the two substitute options?

A: LM4040C41ILPR provides ±0.5% tolerance with 100 ppm/°C temperature coefficient. LM4040D41ILPR provides ±1% tolerance with 150 ppm/°C temperature coefficient. Both offer improved or equivalent noise performance compared to the original part.

Q: Are there any compliance concerns with these substitutes?

A: No. Both substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: How do the cathode current specifications differ?

A: The original part specifies 60 µA cathode current, while both substitutes specify 88 µA. This difference is within acceptable operating margins for shunt reference applications and does not affect functional equivalence.

Q: Which substitute should I select for my application?

A: Selection depends on your tolerance and temperature stability requirements. If your circuit requires tighter voltage accuracy, LM4040C41ILPR is the preferred choice. If the original ±2% tolerance specification is acceptable, LM4040D41ILPR provides a cost-effective alternative.