TL431BQDBVR Equivalent & Substitute Parts

Part Overview

The TL431BQDBVR is an adjustable shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage regulation and reference applications. This component operates across a 2.495V to 36V output range with ±0.5% tolerance and supports 100 mA output current in a compact SOT-23-5 surface mount package. The device maintains active product status with 2,300 units currently in stock. Substitute parts are identified when equivalent functional performance can be achieved within the specified electrical and mechanical parameters of this product category.

Substiute Parts

TL431BQDBVR

Texas InstrumentsIn Stock: 2364TL431BQDBVR Datasheet

Current PartRFQ

AS431BKTR-G1

Diodes IncorporatedIn Stock: 4229AS431BKTR-G1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TL431BQDBVR are qualified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Reference Type: Shunt voltage reference
• Output Type: Adjustable
• Package: SOT-23-5 (SC-74A)
• Mounting: Surface Mount
• Output Current: 100 mA
• Voltage Range: 2.5V to 36V minimum
• Operating Temperature: -40°C to 125°C
• Product Status: Active
• RoHS Compliance: ROHS3 Compliant

The AS431BKTR-G1 from Diodes Incorporated qualifies as a substitute based on matching all primary criteria. Tolerance variation (±1% vs ±0.5%) and cathode current differences (1 mA vs 700 µA) are within acceptable substitution parameters for this component category.

Parameter Comparison

Engineering Selection Recommendations

Both the TL431BQDBVR and AS431BKTR-G1 maintain active product status and ROHS3 compliance, qualifying them for current design implementations. The TL431BQDBVR offers tighter tolerance specification (±0.5%) and superior moisture handling (MSL 1). The AS431BKTR-G1 provides equivalent functional performance with documented temperature coefficient characteristics and higher current inventory availability (4,122 units vs 2,300 units).

Selection between these parts should be based on application tolerance requirements and supply chain availability. Both devices support identical voltage ranges, output current capacity, and operating temperature specifications within the SOT-23-5 package format.

Frequently Asked Questions (FAQ)

Q: Can AS431BKTR-G1 directly replace TL431BQDBVR in existing designs?

A: Yes, within applications where ±1% tolerance is acceptable. The AS431BKTR-G1 matches all critical electrical parameters including voltage range (2.5V to 36V), output current (100 mA), and operating temperature (-40°C to 125°C). The primary difference is tolerance specification (±1% vs ±0.5%) and moisture sensitivity level.

Q: What are the key differences between these parts?

A: Tolerance specification differs (±0.5% vs ±1%), cathode current varies (700 µA vs 1 mA), and moisture sensitivity levels differ (MSL 1 vs MSL 3). Both parts share identical package type (SOT-23-5), voltage range, output current, and operating temperature specifications.

Q: Are both parts suitable for high-reliability applications?

A: Both parts maintain active product status and ROHS3 compliance. The TL431BQDBVR provides superior moisture handling characteristics (MSL 1). Application-specific reliability requirements should determine final part selection.

Q: Does package compatibility affect substitution?

A: No. Both parts use identical SOT-23-5 (SC-74A) surface mount packaging in Tape & Reel format, ensuring mechanical and electrical compatibility at the board level.

Q: What is the impact of tolerance differences on circuit performance?

A: The ±0.5% tolerance of TL431BQDBVR provides tighter voltage reference accuracy compared to the ±1% tolerance of AS431BKTR-G1. Applications requiring precision voltage regulation should account for this specification difference during design validation.