ZR40401R41STZ Equivalent & Substitute Parts

Part Overview

The ZR40401R41STZ is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 4.096V output with ±1% 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 housed in an E-Line-3 (TO-92 compatible) package for through-hole mounting applications.

Substiute Parts

ZR40401R41STZ

Diodes IncorporatedIn Stock: 759ZR40401R41STZ Datasheet

Current PartRFQ

LM4040D41ILPR

Texas InstrumentsIn Stock: 2716LM4040D41ILPR Datasheet

DirectRFQ

LM4040C41ILPR

Texas InstrumentsIn Stock: 2736LM4040C41ILPR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ZR40401R41STZ is determined by the following critical parameters:

• Fixed output voltage of 4.096V
• Shunt reference topology
• 15 mA output current capability
• Through-hole mounting in TO-92-3 package configuration
• Operating temperature range of -40°C to 85°C
• ROHS3 compliance and REACH unaffected status

The substitute parts identified (LM4040D41ILPR and LM4040C41ILPR) satisfy these core requirements. Both are Texas Instruments shunt voltage reference ICs with identical 4.096V fixed output, 15 mA output current, and compatible TO-92-3 package specifications. Differences in tolerance, temperature coefficient, and noise characteristics are secondary parameters that do not prevent functional substitution within the defined electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Both LM4040D41ILPR and LM4040C41ILPR are active products from Texas Instruments and represent viable alternatives to the obsolete ZR40401R41STZ. Selection between these two substitutes depends on application-specific tolerance requirements:

The LM4040D41ILPR maintains ±1% tolerance matching the original part specification, with a 150ppm/°C temperature coefficient. This option provides direct functional equivalence for applications where the original tolerance specification is sufficient.

The LM4040C41ILPR offers improved ±0.5% tolerance with a 100ppm/°C temperature coefficient, matching the original temperature coefficient performance. This option is suitable for applications requiring tighter output voltage accuracy or enhanced temperature stability.

Both substitutes are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the original part. The TO-92-3 package configuration is mechanically compatible with the original E-Line-3 (TO-92 compatible) footprint for through-hole PCB mounting.

Frequently Asked Questions (FAQ)

Q: Can LM4040D41ILPR and LM4040C41ILPR be used interchangeably with ZR40401R41STZ?

A: Both parts are functionally equivalent for applications requiring a 4.096V fixed shunt voltage reference with 15 mA output current and -40°C to 85°C operating temperature range. The primary difference is tolerance specification: LM4040D41ILPR matches the original ±1% tolerance, while LM4040C41ILPR provides tighter ±0.5% tolerance. Selection depends on application accuracy requirements.

Q: Are there package compatibility concerns when substituting these parts?

A: The LM4040 series uses TO-92-3 (TO-226AA) package configuration, which is mechanically compatible with the original E-Line-3 (TO-92 compatible) package. Both are through-hole mounted devices with identical pin configurations for direct PCB substitution.

Q: What is the impact of the temperature coefficient difference between substitutes?

A: The LM4040D41ILPR has a 150ppm/°C temperature coefficient compared to the original 100ppm/°C specification. For applications operating across the full -40°C to 85°C range, this results in a maximum output voltage drift of approximately 0.122% over temperature for the LM4040D41ILPR versus 0.082% for the LM4040C41ILPR. Application requirements determine whether this difference is acceptable.

Q: Do both substitute parts meet regulatory compliance requirements?

A: Both LM4040D41ILPR and LM4040C41ILPR are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original ZR40401R41STZ.

Q: What is the significance of the cathode current difference?

A: The original part specifies 60 µA cathode current, while both substitutes specify 88 µA. This parameter represents the minimum operating current required to maintain regulation. The higher value in the substitutes does not prevent functional substitution but may require circuit design consideration for applications with strict power consumption constraints.