ZR431C01 Equivalent & Substitute Parts

Part Overview

The ZR431C01 is a shunt voltage reference IC manufactured by Diodes Incorporated, designed for adjustable voltage regulation applications. This component provides a fixed 2.5V to 20V adjustable output with ±1% tolerance and 100 mA output current capability in a TO-92 through-hole package. The ZR431C01 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across core parameters including output voltage range, tolerance, output current, and temperature coefficient specifications.

Substiute Parts

ZR431C01

Diodes IncorporatedIn Stock: 999ZR431C01 Datasheet

Current PartRFQ

ZR431F01TA

Diodes IncorporatedIn Stock: 35473ZR431F01TA Datasheet

MFR RecommendedRFQ

LMV431AIZ/NOPB

Texas InstrumentsIn Stock: 2423LMV431AIZ/NOPB Datasheet

MFR RecommendedRFQ

TL431AILP

Toshiba Semiconductor and StorageIn Stock: 6062TL431AILP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ZR431C01 are evaluated based on the following critical parameters that determine functional equivalence:

Primary Compatibility Criteria:

• Reference Type: Shunt (all substitutes must be shunt-type references)
• Output Type: Adjustable (voltage output must be user-adjustable)
• Voltage Range: Output voltage capability must encompass or exceed the 2.5V to 20V range
• Output Current: Minimum 100 mA capability required
• Tolerance: ±1% accuracy specification
• Temperature Coefficient: 55ppm/°C or better
• Operating Temperature: -40°C to 85°C minimum range
• RoHS Compliance: ROHS3 or equivalent environmental standard

Substitutes are grouped into two categories:

1. Direct Package Equivalent (TO-92): ZR431F01TA and LMV431AIZ/NOPB maintain through-hole mounting compatibility with the original ZR431C01, allowing direct board-level replacement without layout modification.

2. Alternative Package (SOT-23): ZR431F01TA also available in SOT-23-3 surface-mount package for designs requiring compact form factors.

Parameter Comparison

Engineering Selection Recommendations

ZR431F01TA (Diodes Incorporated) - Primary Recommendation

The ZR431F01TA is the manufacturer-recommended direct equivalent. It maintains identical electrical specifications to the ZR431C01 across all critical parameters: 2.5V to 20V output range, 100 mA output current, ±1% tolerance, and 55ppm/°C temperature coefficient. The part is in active production status with ROHS3 compliance certification. Available in both TO-92-3 through-hole and SOT-23-3 surface-mount packages, providing design flexibility. Inventory availability is substantial at 35,400 units.

LMV431AIZ/NOPB (Texas Instruments) - Secondary Option

The LMV431AIZ/NOPB is an active-status alternative from Texas Instruments in TO-92-3 through-hole package. This part maintains ±1% tolerance and -40°C to 85°C operating temperature range. However, the output current specification of 15 mA is significantly lower than the ZR431C01's 100 mA requirement, and the minimum output voltage is 1.24V rather than 2.5V. This part is suitable only for applications where output current demand does not exceed 15 mA. ROHS3 compliance is confirmed.

TL431AILP (Toshiba Semiconductor and Storage) - Limited Data

The TL431AILP is available in TO-92-3 package with active product status and RoHS compliance. However, critical electrical parameters including output voltage range, output current, tolerance, and temperature coefficient are not specified in the provided data. This part cannot be recommended without complete parameter documentation.

Frequently Asked Questions (FAQ)

Q: Can ZR431F01TA directly replace ZR431C01 in existing designs?

A: Yes. The ZR431F01TA maintains identical electrical specifications and is available in TO-92-3 through-hole package, enabling direct board-level substitution without circuit modification. The SOT-23-3 variant requires PCB layout changes but offers space savings for new designs.

Q: What is the key difference between ZR431F01TA and LMV431AIZ/NOPB?

A: The primary difference is output current capability. ZR431F01TA provides 100 mA output current matching the original ZR431C01, while LMV431AIZ/NOPB is limited to 15 mA. Additionally, LMV431AIZ/NOPB has a lower minimum output voltage of 1.24V versus 2.5V. Select ZR431F01TA for applications requiring full 100 mA output current.

Q: Are all substitute parts RoHS compliant?

A: Yes. ZR431F01TA and LMV431AIZ/NOPB are ROHS3 compliant. TL431AILP is RoHS compliant. All parts meet environmental regulatory requirements for new production.

Q: Can LMV431AIZ/NOPB be used in applications designed for ZR431C01?

A: Only if the application requires output current of 15 mA or less and minimum output voltage of 1.24V or higher. The 100 mA output current specification of the original ZR431C01 cannot be achieved with LMV431AIZ/NOPB. Verify circuit requirements before substitution.

Q: What package options are available for ZR431F01TA?

A: ZR431F01TA is available in two packages: TO-92-3 (through-hole, compatible with ZR431C01 footprint) and SOT-23-3 (surface-mount, compact form factor). Select based on PCB assembly requirements and available board space.

Q: Is temperature coefficient specification critical for substitution?

A: Yes. The ZR431C01 specifies 55ppm/°C temperature coefficient. ZR431F01TA matches this specification exactly. LMV431AIZ/NOPB and TL431AILP do not provide temperature coefficient data, making them unsuitable for applications with strict temperature stability requirements.