TL431BCP Equivalent & Substitute Parts

Part Overview

The TL431BCP is a shunt voltage reference IC manufactured by onsemi, designed for precision voltage regulation applications. This adjustable reference provides a fixed output of 2.495V with a maximum output capability of 36V and 100mA current capacity. The device features ±0.4% tolerance and operates across a 0°C to 70°C temperature range in an 8-DIP through-hole package.

The TL431BCP is classified as obsolete. Identifying equivalent and substitute parts is essential for design continuity, procurement flexibility, and long-term product support in applications where this reference voltage IC is critical.

Substiute Parts

TL431BCP

onsemiIn Stock: 5206TL431BCP Datasheet

Current PartRFQ

TL431BCP

onsemiIn Stock: 5206TL431BCP Datasheet

DirectRFQ

TL431ACP

onsemiIn Stock: 4616TL431ACP Datasheet

SimilarRFQ

TL431AIP

onsemiIn Stock: 3333TL431AIP Datasheet

SimilarRFQ

TL431BIP

onsemiIn Stock: 863TL431BIP Datasheet

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TL431CP

Texas InstrumentsIn Stock: 42630TL431CP Datasheet

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TL431IP

onsemiIn Stock: 4351TL431IP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL431BCP is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Reference Type: Shunt (all candidates match)
• Output Type: Adjustable (all candidates match)
• Voltage - Output (Min/Fixed): 2.495V (all candidates match)
• Voltage - Output (Max): 36V (all candidates match)
• Current - Output: 100mA (all candidates match)
• Current - Cathode: 1mA (all candidates match)
• Temperature Coefficient: 50ppm/°C Typical (all candidates match)

Mechanical Compatibility Requirements:

• Mounting Type: Through Hole (all candidates match)
• Package / Case: 8-DIP (0.300", 7.62mm) (all candidates match)

Tolerance and Temperature Variations: Substitute parts differ in tolerance specifications (±0.4%, ±1%, ±2.2%) and operating temperature ranges (0°C ~ 70°C or -40°C ~ 85°C). These variations determine suitability for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Identical Specifications): TL431BIP is the direct equivalent to TL431BCP, offering identical electrical specifications (±0.4% tolerance, 2.495V / 36V output) with an extended operating temperature range (-40°C ~ 85°C). This part is suitable for applications requiring the same precision as the original TL431BCP.

Tolerance-Based Substitutes: TL431ACP and TL431AIP provide ±1% tolerance, representing a relaxation of precision compared to the TL431BCP's ±0.4%. These parts are suitable for applications where ±1% tolerance is acceptable. TL431AIP extends the operating temperature to -40°C ~ 85°C.

TL431CP (Texas Instruments) and TL431IP (onsemi) provide ±2.2% tolerance. TL431CP is currently in active production status, making it the most readily available option for new designs. TL431IP offers extended temperature range (-40°C ~ 85°C) with the same tolerance specification.

Product Status Consideration: All onsemi variants (TL431BCP, TL431ACP, TL431AIP, TL431BIP, TL431IP) are classified as obsolete. TL431CP from Texas Instruments maintains active product status, ensuring long-term availability and supply chain continuity for new applications or high-volume requirements.

Frequently Asked Questions (FAQ)

Q: Can TL431CP replace TL431BCP directly? A: TL431CP is electrically compatible in terms of reference type, output voltage, current capacity, and package. However, TL431CP has a ±2.2% tolerance compared to TL431BCP's ±0.4%. Applications requiring ±0.4% precision must use TL431BIP or equivalent ±0.4% variants. TL431CP is suitable for applications where ±2.2% tolerance is acceptable.

Q: What is the difference between TL431BCP and TL431BIP? A: Both parts share identical electrical specifications (±0.4% tolerance, 2.495V / 36V output, 100mA current). The primary difference is operating temperature range: TL431BCP operates 0°C ~ 70°C, while TL431BIP operates -40°C ~ 85°C. TL431BIP is suitable for extended temperature applications.

Q: Are all substitute parts in the same 8-DIP package? A: Yes. All listed substitute parts use the 8-DIP (0.300", 7.62mm) through-hole package, ensuring mechanical compatibility and direct board-level substitution without layout modifications.

Q: Which substitute part offers the best long-term availability? A: TL431CP from Texas Instruments is the only part with active product status. For applications requiring long-term supply assurance, TL431CP is the recommended choice, provided that ±2.2% tolerance meets application requirements.

Q: Can I use TL431AIP if my application requires ±0.4% tolerance? A: No. TL431AIP provides ±1% tolerance, which exceeds the ±0.4% specification of TL431BCP. For ±0.4% tolerance requirements, use TL431BIP or TL431BCP.