ZR431C01L Equivalent & Substitute Parts

Part Overview

The ZR431C01L is a shunt voltage reference IC manufactured by Diodes Incorporated, designed for adjustable voltage regulation applications. This through-hole TO-92 packaged component provides a fixed 2.5V output with adjustable capability up to 20V, delivering 100mA output current with ±1% tolerance. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing design support and production continuity.

Substiute Parts

ZR431C01L

Diodes IncorporatedIn Stock: 1108ZR431C01L Datasheet

Current PartRFQ

ZR431F01TA

Diodes IncorporatedIn Stock: 35473ZR431F01TA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ZR431C01L is determined by electrical parameter equivalence across the ZR431 base product family. The primary substitute, ZR431F01TA, maintains identical electrical specifications including reference type (shunt), output type (adjustable), voltage range (2.5V to 20V), output current (100mA), tolerance (±1%), temperature coefficient (55ppm/°C), and cathode current (50µA). The key differentiator is packaging: ZR431F01TA uses surface-mount SOT-23-3 technology versus the through-hole TO-92 package of the original part. Both components share the same base product number (ZR431) and comply with identical regulatory standards (ROHS3, REACH Unaffected, EAR99 ECCN classification).

Parameter Comparison

Engineering Selection Recommendations

The ZR431F01TA serves as the direct electrical equivalent to the ZR431C01L, with all voltage regulation and current delivery specifications maintained. Selection between these parts is determined by board-level design requirements. The ZR431C01L through-hole TO-92 package is suitable for through-hole PCB assembly and breadboard prototyping. The ZR431F01TA surface-mount SOT-23-3 package is appropriate for modern surface-mount production environments and compact PCB layouts. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The ZR431F01TA holds active product status with established supply availability (35,400 pcs in stock), whereas the ZR431C01L is obsolete. For new designs or production transitions, ZR431F01TA is the recommended path forward, contingent upon PCB assembly capability for surface-mount components.

Frequently Asked Questions (FAQ)

Q: Can ZR431F01TA directly replace ZR431C01L in existing designs? A: Electrical substitution is complete. Mechanical substitution requires PCB redesign due to package differences: ZR431C01L uses through-hole TO-92-3 mounting, while ZR431F01TA uses surface-mount SOT-23-3. Pin configuration and electrical function are equivalent.

Q: What are the key electrical parameters that define substitution eligibility? A: Substitution is valid when reference type (shunt), output type (adjustable), voltage range (2.5V to 20V), output current (100mA), tolerance (±1%), temperature coefficient (55ppm/°C), and cathode current (50µA) are identical. Both parts meet these criteria.

Q: Why is ZR431C01L marked obsolete? A: Product status reflects manufacturer lifecycle decisions. The ZR431F01TA surface-mount variant represents the active continuation of the ZR431 product line, aligning with industry transition toward surface-mount technology.

Q: Are there compliance differences between these parts? A: No. Both parts are ROHS3 compliant, REACH unaffected, and classified under EAR99 ECCN. Regulatory and environmental compliance is equivalent.

Q: What inventory considerations apply? A: ZR431C01L has 1,015 pcs available as new original stock. ZR431F01TA has 35,400 pcs available, indicating stronger supply continuity for the surface-mount variant.