TL431BCPWR Equivalent & Substitute Parts

Part Overview

The TL431BCPWR is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage regulation and reference applications in power management circuits. This adjustable reference device operates across a 2.495V to 36V output range with ±0.5% tolerance and supports 100 mA output current. The part is classified as Obsolete, which necessitates identification of active equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

TL431BCPWR

Texas InstrumentsIn Stock: 4961TL431BCPWR Datasheet

Current PartRFQ

TL431BCDBZR

Texas InstrumentsIn Stock: 56226TL431BCDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL431BCPWR is determined by electrical and mechanical compatibility across the following critical parameters:

• Reference Type: Shunt voltage reference architecture
• Output Type: Adjustable output voltage capability
• Voltage Range: 2.495V minimum to 36V maximum output
• Current Rating: 100 mA output current capacity
• Tolerance: ±0.5% accuracy specification
• Cathode Current: 600 µA operating requirement
• Temperature Range: 0°C to 70°C operating window
• Compliance: ROHS3 and REACH compliance status
• Base Product Number: TL431 series designation

The TL431BCDBZR qualifies as a direct substitute based on identical electrical specifications across all parameters listed above. The primary difference is packaging format: the substitute uses SOT-23-3 package instead of 8-TSSOP, and features Active product status versus Obsolete.

Parameter Comparison

Engineering Selection Recommendations

The TL431BCDBZR is the manufacturer-recommended substitute for the obsolete TL431BCPWR. Both parts maintain identical electrical specifications and compliance certifications. The TL431BCDBZR carries Active product status, ensuring long-term availability and supply chain continuity. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The primary consideration for selection is PCB layout accommodation: the SOT-23-3 package of the substitute requires different footprint design compared to the 8-TSSOP package of the original part.

Frequently Asked Questions (FAQ)

Q: Can TL431BCDBZR directly replace TL431BCPWR in existing designs?

A: Electrical substitution is valid based on identical specifications. PCB layout modification is required due to different package formats (SOT-23-3 versus 8-TSSOP). Schematic connections remain unchanged.

Q: What is the primary reason for substitution?

A: The TL431BCPWR is classified as Obsolete. The TL431BCDBZR is the active equivalent with identical electrical performance and manufacturer recommendation.

Q: Are there compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings (MSL 1).

Q: How do the packages differ?

A: TL431BCPWR uses 8-TSSOP (0.173", 4.40mm width) packaging. TL431BCDBZR uses SOT-23-3 (TO-236-3, SC-59) packaging. Both are surface mount formats with different pin configurations and footprints.

Q: Are the electrical specifications identical?

A: Yes. Output voltage range (2.495V to 36V), current ratings (100 mA output, 600 µA cathode), tolerance (±0.5%), and operating temperature (0°C to 70°C) are identical across both parts.