TL431ILPRAG Equivalent & Substitute Parts

Part Overview

The TL431ILPRAG is an adjustable shunt voltage reference IC manufactured by onsemi, designed for precision voltage regulation and reference applications. This TO-92-3 packaged component delivers a 2.495V adjustable output with ±2.2% tolerance and supports up to 100 mA output current across a 2.495V to 36V range. The device operates across -40°C to 85°C and maintains active product status with full RoHS3 compliance. Equivalent and substitute parts are identified to support design flexibility, inventory optimization, and supply chain continuity for applications requiring adjustable shunt voltage reference functionality.

Key Parameters

Parameter	Value
Manufacturer	onsemi
Part Number	TL431ILPRAG
Category	Power Management (PMIC)
Reference Type	Shunt
Output Type	Adjustable
Voltage Output (Min/Fixed)	2.495V
Voltage Output (Max)	36V
Current Output	100 mA
Tolerance	±2.2%
Temperature Coefficient	50 ppm/°C Typical
Current Cathode	1 mA
Operating Temperature	-40°C to 85°C
Package	TO-92-3 (TO-226AA)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TL431ILPRAG is determined by the following critical parameters: reference type (shunt), output type (adjustable), voltage output range (2.495V minimum to 36V maximum), current output capacity (100 mA), package type (TO-92-3), and mounting configuration (through hole). Parts are grouped into three categories based on substitution relationship:

Similar Manufacturer Parts maintain identical or superior electrical specifications while differing in tolerance, temperature coefficient, or operating temperature range. These parts are functionally interchangeable when tolerance and temperature performance meet or exceed application requirements.

Parametric Equivalent Parts share the same base product number and electrical characteristics as the main part, differing only in packaging designation or supplier device package coding.

Direct Manufacturer Parts represent the same design from alternative manufacturers (Texas Instruments) with identical electrical specifications and package configuration.

Parameter Comparison

Part Number	Manufacturer	Tolerance	Temp Coeff	Operating Temp	Current Cathode	Voltage Output (Min)	Current Output	Package
TL431ILPRAG	onsemi	±2.2%	50 ppm/°C	-40°C to 85°C	1 mA	2.495V	100 mA	TO-92-3
TL431ILPRPG	onsemi	±2.2%	50 ppm/°C	-40°C to 85°C	1 mA	2.495V	100 mA	TO-92-3
TL431ILPR	Texas Instruments	±2.2%	Not specified	-40°C to 85°C	1 mA	2.495V	100 mA	TO-92-3
FAN431AZXA	Fairchild Semiconductor	±1%	50 ppm/°C	-25°C to 85°C	1 mA	2.495V	100 mA	TO-92-3
KA431AZTA	onsemi	±1%	50 ppm/°C	-25°C to 85°C	1 mA	2.495V	100 mA	TO-92-3
KA431LZTA	onsemi	±0.5%	50 ppm/°C	-25°C to 85°C	1 mA	2.495V	100 mA	TO-92-3
AS431AZTR-E1	Diodes Incorporated	±0.5%	20 ppm/°C	-40°C to 125°C	1 mA	2.5V	100 mA	TO-92
AS431AZTR-G1	Diodes Incorporated	±0.5%	20 ppm/°C	-40°C to 125°C	1 mA	2.5V	100 mA	TO-92
AS431BZTR-E1	Diodes Incorporated	±1%	20 ppm/°C	-40°C to 125°C	1 mA	2.5V	100 mA	TO-92
AS431BZTR-G1	Diodes Incorporated	±1%	20 ppm/°C	-40°C to 125°C	1 mA	2.5V	100 mA	TO-92
AS431IAZTR-G1	Diodes Incorporated	±0.5%	Not specified	-40°C to 125°C	50 µA	2.5V	100 mA	TO-92

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent): TL431ILPRPG from onsemi provides identical electrical specifications and operating parameters to the TL431ILPRAG, differing only in packaging designation. This part maintains full RoHS3 compliance and active product status.

Same Manufacturer Alternative (Superior Tolerance): KA431LZTA and KA431AZTA from onsemi offer improved tolerance specifications (±0.5% and ±1% respectively) compared to the TL431ILPRAG (±2.2%), with identical voltage output and current ratings. Both maintain RoHS3 compliance and active status. Operating temperature range is -25°C to 85°C, which is narrower than the main part.

Cross-Manufacturer Direct Equivalent: TL431ILPR from Texas Instruments matches the TL431ILPRAG specification exactly, including ±2.2% tolerance and -40°C to 85°C operating range. RoHS3 compliance and active product status are confirmed.

Fairchild Semiconductor Alternative: FAN431AZXA delivers superior tolerance (±1%) with identical voltage and current specifications. Operating temperature range is -25°C to 85°C. RoHS3 compliance is confirmed.

Diodes Incorporated Series (Extended Temperature Range): AS431 series parts from Diodes Incorporated extend operating temperature to -40°C to 125°C and feature improved temperature coefficient (20 ppm/°C vs. 50 ppm/°C). Voltage output minimum is 2.5V (vs. 2.495V). AS431AZTR-E1, AS431AZTR-G1, and AS431IAZTR-G1 offer ±0.5% tolerance; AS431BZTR-E1 and AS431BZTR-G1 offer ±1% tolerance. All maintain RoHS3 compliance and active status. AS431IAZTR-G1 features reduced cathode current (50 µA vs. 1 mA).

Frequently Asked Questions (FAQ)

Q: Can I use KA431LZTA as a direct replacement for TL431ILPRAG?

A: KA431LZTA is functionally compatible for applications where the narrower operating temperature range (-25°C to 85°C vs. -40°C to 85°C) is acceptable. The superior tolerance (±0.5% vs. ±2.2%) makes it suitable for precision applications. Verify your circuit's temperature requirements before substitution.

Q: What is the difference between TL431ILPRAG and TL431ILPRPG?

A: These parts are parametric equivalents with identical electrical specifications. The difference lies in packaging designation coding. Both are manufactured by onsemi and maintain the same performance characteristics.

Q: Are Diodes Incorporated AS431 parts compatible with TL431ILPRAG?

A: AS431 series parts are compatible substitutes with the following considerations: minimum voltage output is 2.5V (vs. 2.495V), operating temperature extends to 125°C (vs. 85°C), and temperature coefficient is superior (20 ppm/°C vs. 50 ppm/°C). Package designation is TO-92 rather than TO-92-3, though both are through-hole TO-92 variants. Verify your application's voltage tolerance requirements.

Q: Which substitute offers the best tolerance specification?

A: KA431LZTA and AS431 series parts (AS431AZTR-E1, AS431AZTR-G1, AS431IAZTR-G1) all offer ±0.5% tolerance, superior to the TL431ILPRAG's ±2.2%. Selection depends on operating temperature range and cathode current requirements.

Q: Can I use a substitute with a different minimum voltage output (2.5V vs. 2.495V)?

A: The 0.005V difference between 2.495V and 2.5V is negligible for most applications. However, precision voltage reference circuits may require verification that this variance does not affect circuit performance or compliance with design specifications.

Q: What is the significance of cathode current differences?

A: Most substitutes maintain 1 mA cathode current. AS431IAZTR-G1 features reduced cathode current (50 µA), which may reduce power dissipation in low-current applications. Verify your circuit design accommodates this parameter variation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts maintain RoHS3 compliance and active product status, ensuring regulatory compliance for current manufacturing and deployment.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message