TL431ACPWR Equivalent & Substitute Parts

Part Overview

The TL431ACPWR is a shunt voltage reference IC with adjustable output, manufactured by Texas Instruments. This component functions as a precision voltage reference in power management applications, offering adjustable output from 2.495V to 36V with ±1% tolerance and 100mA output capability. The TL431ACPWR is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production support. The primary substitute is available in an active product status with identical electrical specifications but different packaging configuration.

Substiute Parts

TL431ACPWR

Texas InstrumentsIn Stock: 8486TL431ACPWR Datasheet

Current PartRFQ

TL431ACDBZR

Texas InstrumentsIn Stock: 77248TL431ACDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL431ACPWR is determined by electrical parameter equivalence across the following criteria:

Reference type (Shunt), output type (Adjustable), output voltage range (2.495V to 36V), output current (100mA), tolerance (±1%), cathode current (600µA), and operating temperature range (0°C ~ 70°C) must remain identical. The substitute part TL431ACDBZR maintains all electrical specifications while differing only in package configuration and product status. Both parts share the same base product number (TL431) and comply with identical regulatory standards (ROHS3, REACH Unaffected, EAR99).

Parameter Comparison

Engineering Selection Recommendations

The TL431ACDBZR is the active equivalent for the obsolete TL431ACPWR. Both parts maintain identical electrical performance across all specified parameters. Selection between these parts is determined by PCB layout requirements and packaging constraints. The TL431ACPWR uses 8-TSSOP packaging, while the TL431ACDBZR uses SOT-23-3 packaging. Both parts comply with ROHS3 standards and carry unlimited moisture sensitivity classification. For new designs and production continuity, the TL431ACDBZR is the appropriate choice due to its active product status and continued availability.

Frequently Asked Questions (FAQ)

Q: Can TL431ACDBZR directly replace TL431ACPWR in existing designs?

A: Electrical substitution is complete. However, the package change from 8-TSSOP to SOT-23-3 requires PCB layout modification. Pin configuration and footprint differ between these packages.

Q: What are the key differences between 8-TSSOP and SOT-23-3 packages?

A: 8-TSSOP is an 8-pin package with 0.173" width and 4.40mm body width. SOT-23-3 is a 3-pin package. Physical dimensions, pin count, and PCB footprints are not interchangeable without redesign.

Q: Are there any compliance or certification differences?

A: Both parts carry identical compliance certifications: ROHS3 Compliant, REACH Unaffected, EAR99 classification, and MSL 1 (Unlimited) moisture sensitivity rating.

Q: Why is TL431ACPWR listed as obsolete?

A: Product status reflects Texas Instruments' lifecycle management. The TL431ACDBZR remains in active production with identical electrical specifications.

Q: What is the minimum cathode current requirement?

A: The specified cathode current is 600µA for both parts. This parameter is critical for circuit design and must be accommodated in the application schematic.