TL431BIDBVRG4 Equivalent & Substitute Parts

Part Overview

The TL431BIDBVRG4 is a shunt voltage reference IC manufactured by Texas Instruments, designed for adjustable voltage regulation applications. This component provides a fixed output voltage of 2.495V with a maximum rating of 36V and supports output currents up to 100 mA. The device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The TL431BIDBVRG4 is packaged in SOT-23-5 surface mount configuration and complies with RoHS3 and REACH standards.

Substiute Parts

TL431BIDBVRG4

Texas InstrumentsIn Stock: 12729TL431BIDBVRG4 Datasheet

Current PartRFQ

AS431BKTR-G1

Diodes IncorporatedIn Stock: 4229AS431BKTR-G1 Datasheet

MFR RecommendedRFQ

TL431BW5-7

Diodes IncorporatedIn Stock: 5975TL431BW5-7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TL431BIDBVRG4 are selected based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Reference Type: Shunt
• Output Type: Adjustable
• Voltage - Output (Min/Fixed): 2.495V or 2.5V
• Voltage - Output (Max): 36V
• Current - Output: 100 mA
• Tolerance: ±0.5% or ±1%
• Package / Case: SC-74A, SOT-753 (SOT-23-5 or SOT-25 variants)
• RoHS3 Compliance: Required

The substitute parts identified maintain the core shunt voltage reference functionality with output voltage ranges and current ratings compatible with the original TL431BIDBVRG4 design. Variations in tolerance (±0.5% vs ±1%), operating temperature range, and package type (SOT-23-5 vs SOT-25) are noted as secondary considerations based on application requirements.

Parameter Comparison

Engineering Selection Recommendations

AS431BKTR-G1 (Diodes Incorporated): This substitute maintains identical voltage output range (36V maximum) and current output (100 mA) specifications. The primary difference is tolerance specification at ±1% compared to the original ±0.5%, and an increased cathode current of 1 mA versus 700 µA. Operating temperature range extends to 125°C. Product status is Active with full RoHS3 compliance. Packaging is SOT-23-5 with Tape & Reel configuration. Moisture sensitivity is rated at MSL 3 (168 Hours).

TL431BW5-7 (Diodes Incorporated): This substitute provides the closest electrical match to the TL431BIDBVRG4, maintaining identical tolerance (±0.5%), voltage output (2.495V minimum, 36V maximum), current output (100 mA), and cathode current (700 µA). Operating temperature range extends to 125°C. Product status is Active with full RoHS3 compliance. The primary difference is package type: SOT-25 instead of SOT-23-5. Moisture sensitivity is rated at MSL 1 (Unlimited), matching the original part.

Both substitute parts are currently in active production status, ensuring long-term availability and supply chain continuity compared to the obsolete TL431BIDBVRG4.

Frequently Asked Questions (FAQ)

Q: Can AS431BKTR-G1 be used as a direct replacement for TL431BIDBVRG4?

A: AS431BKTR-G1 is functionally compatible as a substitute. Both are shunt voltage reference ICs with identical output voltage range (36V maximum) and current output (100 mA). The tolerance specification differs (±1% vs ±0.5%), and cathode current is higher (1 mA vs 700 µA). Applications requiring the tighter ±0.5% tolerance should evaluate circuit impact before substitution.

Q: What is the difference between TL431BW5-7 and TL431BIDBVRG4?

A: TL431BW5-7 is electrically equivalent to TL431BIDBVRG4 with identical tolerance (±0.5%), voltage output (2.495V minimum), current output (100 mA), and cathode current (700 µA). The primary difference is package type: TL431BW5-7 uses SOT-25 while TL431BIDBVRG4 uses SOT-23-5. Both packages are surface mount configurations with compatible pinouts for the shunt reference function.

Q: Are there package compatibility considerations when substituting these parts?

A: Yes. TL431BIDBVRG4 and AS431BKTR-G1 both use SOT-23-5 packaging. TL431BW5-7 uses SOT-25 packaging. While both are 5-pin surface mount packages, PCB layout and footprint design must accommodate the specific package type. SOT-23-5 and SOT-25 have different pin spacing and dimensions.

Q: Why is the operating temperature range different between these parts?

A: TL431BIDBVRG4 operates from -40°C to 85°C, while both AS431BKTR-G1 and TL431BW5-7 operate from -40°C to 125°C. The extended temperature range in substitute parts provides additional design margin for applications in elevated temperature environments. Applications limited to -40°C to 85°C operation are unaffected by this specification difference.

Q: What does MSL (Moisture Sensitivity Level) mean for these parts?

A: MSL indicates moisture sensitivity during storage and handling. TL431BIDBVRG4 and TL431BW5-7 are rated MSL 1 (Unlimited), meaning no moisture precautions are required. AS431BKTR-G1 is rated MSL 3 (168 Hours), requiring moisture control during storage and a maximum of 168 hours of floor life after bag opening before reflow soldering.

Q: Can these parts be used interchangeably in existing designs?

A: Electrical substitution is possible with circuit evaluation. TL431BW5-7 provides the closest match with identical tolerance and cathode current. AS431BKTR-G1 requires tolerance and cathode current evaluation. Package type differences (SOT-23-5 vs SOT-25) require PCB footprint verification. All three parts maintain RoHS3 compliance and are suitable for new procurement.