TL431QDBVRG4 Equivalent & Substitute Parts

Part Overview

The TL431QDBVRG4 is a shunt voltage reference IC manufactured by Texas Instruments, designed for adjustable voltage regulation applications. This component features a 2.495V adjustable output with ±2.2% tolerance and supports up to 100 mA output current in a compact SOT-23-5 surface mount package. The part is currently listed as obsolete, making identification of active equivalent alternatives essential for ongoing production and design continuity.

Substiute Parts

TL431QDBVRG4

Texas InstrumentsIn Stock: 1225TL431QDBVRG4 Datasheet

Current PartRFQ

TL431QDBVR

Texas InstrumentsIn Stock: 9421TL431QDBVR Datasheet

MFR RecommendedRFQ

AS431BKTR-G1

Diodes IncorporatedIn Stock: 4229AS431BKTR-G1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TL431QDBVRG4 are qualified based on the following critical parameters that determine functional equivalence:

• Reference Type: Shunt voltage reference architecture
• Output Type: Adjustable output voltage capability
• Voltage Range: Output voltage between 2.495V and 36V
• Current Rating: 100 mA output current capacity
• Cathode Current: 1 mA minimum operating current
• Package: SOT-23-5 surface mount configuration
• Temperature Range: -40°C to 125°C operating specification
• Compliance: ROHS3 and REACH compliance status

The identified substitutes maintain these core electrical and mechanical specifications while offering improvements in product status (active vs. obsolete) and in some cases enhanced performance characteristics such as improved tolerance.

Parameter Comparison

Engineering Selection Recommendations

TL431QDBVR is the primary recommended substitute for the obsolete TL431QDBVRG4. Both parts are manufactured by Texas Instruments with identical electrical specifications and packaging. The TL431QDBVR is currently in active production status with higher inventory availability (9402 units vs. 1143 units for the original part). The primary difference is packaging format: TL431QDBVR is supplied in Tape & Reel configuration, which is standard for production environments.

AS431BKTR-G1 from Diodes Incorporated provides an alternative cross-platform substitute with improved tolerance specification (±1% vs. ±2.2%), offering enhanced voltage accuracy. This part maintains all critical electrical parameters and operates within the same temperature range. The AS431BKTR-G1 features a higher Moisture Sensitivity Level (MSL 3 vs. MSL 1), requiring controlled storage conditions of 168 hours maximum before reflow soldering. This part is also in active production with substantial inventory (4122 units).

Both substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can TL431QDBVR directly replace TL431QDBVRG4 in existing designs?

A: Yes. Both parts share identical electrical specifications including output voltage range (2.495V to 36V), current rating (100 mA), tolerance (±2.2%), and operating temperature range (-40°C to 125°C). The primary difference is packaging format (Tape & Reel vs. tube packaging). PCB layout and schematic connections remain unchanged.

Q: What is the difference between TL431QDBVR and AS431BKTR-G1?

A: Both are functionally equivalent shunt voltage reference ICs in SOT-23-5 packages. The AS431BKTR-G1 offers superior tolerance (±1% vs. ±2.2%), providing tighter voltage accuracy. The AS431BKTR-G1 has a higher Moisture Sensitivity Level (MSL 3), requiring storage in controlled humidity conditions for 168 hours before soldering, whereas TL431QDBVR has unlimited shelf life (MSL 1).

Q: Are there any compliance differences between the substitutes?

A: No. All three parts (TL431QDBVRG4, TL431QDBVR, and AS431BKTR-G1) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What packaging considerations apply to these substitutes?

A: All three parts use the SOT-23-5 surface mount package (SC-74A, SOT-753 case designation). Pin configuration and PCB footprint are identical. The difference lies in supply format: TL431QDBVRG4 and TL431QDBVR may be supplied in different carrier formats (tube vs. Tape & Reel), but the component itself is unchanged.

Q: Which substitute should be selected for new designs?

A: TL431QDBVR is recommended for designs requiring Texas Instruments sourcing continuity. AS431BKTR-G1 is recommended for applications requiring improved voltage accuracy (±1% tolerance). Both are in active production with reliable supply chains.