ZRC500A01STZ Equivalent & Substitute Parts

Part Overview

The ZRC500A01STZ is a shunt voltage reference IC manufactured by Diodes Incorporated, designed to provide a fixed 5V output with ±1% tolerance. This component is classified as a Power Management (PMIC) device and is packaged in TO-92 through-hole format. The part is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

ZRC500A01STZ

Diodes IncorporatedIn Stock: 755ZRC500A01STZ Datasheet

Current PartRFQ

LM4040C50ILPR

Texas InstrumentsIn Stock: 22223LM4040C50ILPR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ZRC500A01STZ is determined by the following critical parameters:

• Reference Type & Output Type: Both main and substitute parts must function as fixed shunt voltage references with 5V output
• Package Compatibility: Through-hole TO-92-3 package ensures mechanical and electrical compatibility with existing PCB layouts
• Voltage Output: Fixed 5V output is mandatory for circuit functionality
• Operating Temperature Range: -40°C ~ 85°C compatibility ensures thermal performance across specified conditions
• Compliance Standards: RoHS3 compliance and REACH unaffected status maintain regulatory alignment

The LM4040C50ILPR qualifies as a direct substitute based on these parameters. While it offers improved tolerance (±0.5% vs ±1%) and higher output current capability (15 mA vs 5 mA), these represent enhancements rather than deviations from the original specification.

Parameter Comparison

Engineering Selection Recommendations

The LM4040C50ILPR is the designated manufacturer-recommended substitute for the ZRC500A01STZ. Selection of this substitute is supported by:

• Product Status: The LM4040C50ILPR maintains active production status, ensuring long-term availability and supply chain continuity
• Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements
• Package Compatibility: Identical TO-92-3 through-hole packaging enables direct PCB layout compatibility without redesign
• Electrical Compatibility: Fixed 5V output with matching operating temperature range (-40°C ~ 85°C) ensures functional equivalence in circuit applications
• Performance Enhancement: The substitute offers improved tolerance (±0.5% vs ±1%), lower noise (80µVrms vs 105µVrms), and higher output current capability (15 mA vs 5 mA), providing superior performance characteristics

Frequently Asked Questions (FAQ)

Q: Can the LM4040C50ILPR be used as a direct replacement for the ZRC500A01STZ?

A: Yes. Both components are fixed 5V shunt voltage references in TO-92-3 through-hole packages with identical operating temperature ranges (-40°C ~ 85°C). The LM4040C50ILPR is the manufacturer-recommended substitute and maintains full electrical and mechanical compatibility.

Q: What are the key differences between these parts?

A: The LM4040C50ILPR offers improved specifications: ±0.5% tolerance versus ±1%, lower noise output (80µVrms vs 105µVrms), and higher maximum output current (15 mA vs 5 mA). These represent performance enhancements rather than functional differences.

Q: Are there any package considerations for substitution?

A: Both parts use identical TO-92-3 through-hole packaging with formed leads. No PCB layout modifications are required for substitution. Pin configuration and lead spacing are equivalent.

Q: Does the substitute maintain compliance certifications?

A: Yes. The LM4040C50ILPR is ROHS3 compliant and REACH unaffected, matching the compliance status of the original ZRC500A01STZ.

Q: Why is the ZRC500A01STZ obsolete?

A: The ZRC500A01STZ has been discontinued by Diodes Incorporated. The LM4040C50ILPR from Texas Instruments remains in active production and serves as the recommended alternative for new designs and legacy system support.