TL431CLPRPG Equivalent & Substitute Parts

Part Overview

The TL431CLPRPG is an adjustable shunt voltage reference IC manufactured by onsemi, designed for power management applications requiring precision voltage regulation. This device provides an adjustable output voltage range from 2.495V to 36V with ±2.2% tolerance and supports output currents up to 100 mA. The part is actively produced and widely used in voltage regulation, feedback control, and precision reference circuits. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and operational parameters to ensure direct circuit functionality.

Key Parameters

Parameter	Value
Manufacturer	onsemi
Part Number	TL431CLPRPG
Reference Type	Shunt
Output Type	Adjustable
Voltage Output (Min)	2.495V
Voltage Output (Max)	36V
Output Current	100 mA
Tolerance	±2.2%
Temperature Coefficient	50 ppm/°C Typical
Cathode Current	1 mA
Operating Temperature	0°C to 70°C
Package Type	TO-92-3 (TO-226)
Mounting Type	Through Hole
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the TL431CLPRPG are classified based on the following electrical and mechanical compatibility criteria:

Critical Parameters for Substitution:

Reference type (Shunt)
Output type (Adjustable)
Voltage output range (2.495V to 36V minimum)
Output current capability (100 mA)
Package type (TO-92-3 / TO-226)
Mounting type (Through Hole)

Tolerance Considerations: Parts with tolerance specifications of ±2.2% or better (±2%, ±1%, ±0.5%) are functionally equivalent for applications where the TL431CLPRPG tolerance is acceptable. Parts with wider tolerance specifications are not included.

Temperature Range Considerations: The TL431CLPRPG operates from 0°C to 70°C. Substitute parts with extended temperature ranges (-25°C to 85°C or -40°C to 125°C) provide broader operational capability and are listed as compatible alternatives.

Parametric Equivalents: Parts with identical electrical specifications but different packaging codes or minor manufacturing variations from the same base product line (TL431 series) are included as parametric equivalents.

Parameter Comparison

Part Number	Manufacturer	Voltage Output (Min/Fixed)	Voltage Output (Max)	Output Current	Tolerance	Operating Temperature	Package Type	Cathode Current
TL431CLPRPG	onsemi	2.495V	36V	100 mA	±2.2%	0°C to 70°C	TO-92-3	1 mA
TL431CLPRAG	onsemi	2.495V	36V	100 mA	±2.2%	0°C to 70°C	TO-92-3	1 mA
TL431CLPM	Texas Instruments	2.495V	36V	100 mA	±2.2%	0°C to 70°C	TO-92-3	1 mA
FAN431AZXA	Fairchild Semiconductor	2.495V	36V	100 mA	±1%	-25°C to 85°C	TO-92-3	1 mA
KA431AZTA	onsemi	2.495V	36V	100 mA	±1%	-25°C to 85°C	TO-92-3	1 mA
KA431LZTA	onsemi	2.495V	36V	100 mA	±0.5%	-25°C to 85°C	TO-92-3	1 mA
LM431ACZX	Fairchild Semiconductor	2.5V	36V	100 mA	±2%	-25°C to 85°C	TO-92-3	1 mA
LM431BCZX	onsemi	2.495V	36V	100 mA	±1%	-25°C to 85°C	TO-92-3	1 mA
LM431BIZX	onsemi	2.495V	36V	100 mA	±1%	-40°C to 85°C	TO-92-3	1 mA
AS431BZTR-E1	Diodes Incorporated	2.5V	36V	100 mA	±1%	-40°C to 125°C	TO-92-3	1 mA
AS431IAZTR-G1	Diodes Incorporated	2.5V	36V	100 mA	±0.5%	-40°C to 125°C	TO-92-3	50 µA

Engineering Selection Recommendations

Direct Equivalents (Identical Specifications): TL431CLPRAG and TL431CLPM are direct parametric equivalents to the TL431CLPRPG, sharing identical electrical specifications, tolerance, and operating temperature range. Both parts are actively produced and ROHS3 compliant. Selection between these three parts depends on manufacturer preference and supply chain availability.

Improved Tolerance Alternatives: KA431AZTA, KA431LZTA, FAN431AZXA, LM431BCZX, LM431BIZX, AS431BZTR-E1, and AS431IAZTR-G1 offer tolerance specifications of ±1% or ±0.5%, providing tighter voltage regulation compared to the ±2.2% specification of the TL431CLPRPG. These parts are suitable for applications requiring enhanced precision. All listed alternatives are ROHS3 compliant and actively produced.

Extended Temperature Range Options: FAN431AZXA, KA431AZTA, KA431LZTA, LM431BCZX, LM431BIZX, AS431BZTR-E1, and AS431IAZTR-G1 support operating temperatures beyond the 0°C to 70°C range of the TL431CLPRPG. Parts rated to -40°C to 125°C (LM431BIZX, AS431BZTR-E1, AS431IAZTR-G1) are suitable for industrial and automotive applications requiring broader thermal operation.

Compliance and Certification: All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the TL431CLPRPG. Selection should prioritize parts with active product status to ensure long-term availability.

Frequently Asked Questions (FAQ)

Q: Can I use KA431LZTA as a direct replacement for TL431CLPRPG? A: Yes. KA431LZTA is functionally compatible with TL431CLPRPG. Both parts share identical voltage output range (2.495V to 36V), output current (100 mA), package type (TO-92-3), and cathode current (1 mA). KA431LZTA offers superior tolerance (±0.5% vs ±2.2%) and extended operating temperature (-25°C to 85°C vs 0°C to 70°C), making it suitable for applications requiring tighter voltage regulation or broader thermal operation.

Q: What is the difference between TL431CLPRPG and TL431CLPM? A: TL431CLPM is manufactured by Texas Instruments while TL431CLPRPG is manufactured by onsemi. Both parts are electrically identical with ±2.2% tolerance, 2.495V to 36V output range, 100 mA output current, and 0°C to 70°C operating temperature. The selection between these parts depends on manufacturer availability and supply chain requirements.

Q: Are AS431 series parts compatible with TL431CLPRPG? A: Yes. AS431BZTR-E1 and AS431IAZTR-G1 from Diodes Incorporated are compatible alternatives. Both maintain the 2.5V to 36V output range and 100 mA output current. AS431BZTR-E1 offers ±1% tolerance with -40°C to 125°C operating range. AS431IAZTR-G1 provides superior ±0.5% tolerance with extended temperature range and reduced cathode current (50 µA vs 1 mA).

Q: What tolerance specification should I select for my application? A: The TL431CLPRPG provides ±2.2% tolerance, suitable for general voltage regulation applications. For applications requiring tighter voltage accuracy, select alternatives with ±1% tolerance (FAN431AZXA, KA431AZTA, LM431BCZX, LM431BIZX, AS431BZTR-E1) or ±0.5% tolerance (KA431LZTA, AS431IAZTR-G1). Tolerance selection depends on the precision requirements of your feedback control circuit.

Q: Can I use parts with extended temperature ranges in place of TL431CLPRPG? A: Yes. Parts rated for -25°C to 85°C or -40°C to 125°C are backward compatible with the 0°C to 70°C operating range of TL431CLPRPG. Extended temperature range parts provide additional operational margin and are suitable for industrial, automotive, and harsh environment applications.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the TL431CLPRPG.

Q: What is the significance of cathode current specifications? A: Cathode current represents the minimum current required to maintain regulation. The TL431CLPRPG specifies 1 mA cathode current. AS431IAZTR-G1 specifies 50 µA, requiring less bias current and reducing power consumption in low-current applications. Both specifications are compatible with standard circuit designs.

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