SC431CSK-2TRT Equivalent & Substitute Parts

Part Overview

The SC431CSK-2TRT is a shunt voltage reference IC manufactured by Semtech Corporation, designed for adjustable precision voltage regulation applications. This component operates with an adjustable output range from 2.495V to 30V, delivering 130µA output current with ±2% tolerance in a SOT-23-3 surface mount package. The product is currently obsolete, making equivalent substitute parts necessary for ongoing design requirements and production continuity.

Substiute Parts

SC431CSK-2TRT

Semtech CorporationIn Stock: 12817SC431CSK-2TRT Datasheet

Current PartRFQ

LM431AIM3/NOPB

Texas InstrumentsIn Stock: 23328LM431AIM3/NOPB Datasheet

MFR RecommendedRFQ

TL431IDBZR,215

Nexperia USA Inc.In Stock: 6134TL431IDBZR,215 Datasheet

MFR RecommendedRFQ

TL431IL3T

STMicroelectronicsIn Stock: 77685TL431IL3T Datasheet

MFR RecommendedRFQ

TL431MFDT,215

NXP SemiconductorsIn Stock: 9288TL431MFDT,215 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC431CSK-2TRT is determined by the following critical parameters:

• Reference Type: Shunt (all substitutes must be shunt-type voltage references)
• Output Type: Adjustable (all substitutes must support adjustable output voltage)
• Voltage - Output (Min/Fixed): 2.495V (all substitutes must match this minimum output voltage)
• Tolerance: ±2% or better (substitutes with ±2% or tighter tolerance are acceptable)
• Package / Case: TO-236-3, SC-59, SOT-23-3 (all substitutes must use compatible SOT-23-3 or TO-236AB packaging)
• Mounting Type: Surface Mount (all substitutes must be surface mount)
• Operating Temperature Range: -40°C ~ 85°C minimum (substitutes with equal or extended range are acceptable)

The substitute parts listed below meet these criteria and are pin-compatible alternatives suitable for direct replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are active products from established semiconductor manufacturers with full RoHS3 compliance (or equivalent), ensuring long-term availability and regulatory compliance superior to the obsolete SC431CSK-2TRT.

LM431AIM3/NOPB (Texas Instruments) offers the highest maximum output voltage at 37V with 100mA output current and REACH compliance documentation. This part is suitable for applications requiring extended voltage headroom.

TL431IDBZR,215 (Nexperia USA Inc.) and TL431MFDT,215 (NXP Semiconductors) both deliver ±2% tolerance matching the original specification, with maximum output voltages of 36V and 100mA output current. The NXP variant extends operating temperature to 125°C, providing thermal margin for demanding environments.

TL431IL3T (STMicroelectronics) provides the widest operating temperature range (-40°C ~ 105°C) with 100mA output current and ±2.21% tolerance. This part offers the largest inventory availability at 77,589 units.

All substitutes maintain pin compatibility and identical minimum output voltage (2.495V) with the original SC431CSK-2TRT, enabling direct replacement in existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SC431CSK-2TRT with any of these substitute parts?

A: Yes. All listed substitutes are pin-compatible shunt voltage reference ICs in SOT-23-3 or TO-236AB packaging with identical minimum output voltage (2.495V) and adjustable output type. Direct PCB replacement is possible without circuit redesign.

Q: What is the main difference between the SC431CSK-2TRT and the substitute parts?

A: The primary difference is product status. The SC431CSK-2TRT is obsolete, while all substitutes are active products from major manufacturers. Additionally, substitute parts offer higher output current (100mA vs. 130µA) and lower cathode current (1mA vs. 150mA), providing improved performance characteristics.

Q: Are there tolerance differences I should consider?

A: The SC431CSK-2TRT specifies ±2% tolerance. Substitute parts offer ±2% to ±2.21% tolerance. Parts with ±2% tolerance (TL431IDBZR,215 and TL431MFDT,215) provide exact tolerance matching. The ±2.2% and ±2.21% variants are acceptable for most applications requiring ±2% or looser specifications.

Q: Which substitute has the best temperature performance?

A: TL431MFDT,215 (NXP) operates to 125°C, offering the widest high-temperature margin. TL431IL3T (STMicroelectronics) extends to 105°C. Both exceed the original -40°C ~ 85°C range.

Q: Are all substitutes RoHS compliant?

A: Yes. All active substitute parts carry ROHS3 compliance certification, exceeding the RoHS compliance of the obsolete SC431CSK-2TRT.

Q: What packaging options are available?

A: All substitutes use SOT-23-3 or TO-236AB packaging, both mechanically and electrically compatible with the original TO-236-3/SC-59/SOT-23-3 package. Verify your PCB footprint supports the specific supplier device package variant.

Q: Which substitute has the highest inventory availability?

A: TL431IL3T (STMicroelectronics) has 77,589 units in stock, providing the largest supply buffer for production requirements.