TL431CLPRP Equivalent & Substitute Parts

Part Overview

The TL431CLPRP is a shunt voltage reference IC manufactured by onsemi, designed for adjustable voltage regulation applications. This component provides a 2.495V to 36V adjustable output with ±2.2% tolerance and 100 mA output current capability in a TO-92-3 package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain electrical compatibility across output voltage range, current capacity, tolerance specifications, and mechanical package dimensions.

Key Parameters

Parameter	Value
Manufacturer Part Number	TL431CLPRP
Manufacturer	onsemi
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	50ppm/°C Typical
Current - Cathode	1 mA
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	TO-226-3, TO-92-3 Long Body (Formed Leads)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the TL431CLPRP are classified based on electrical parameter compatibility. The critical parameters determining substitution eligibility are:

Primary Compatibility Criteria:

Reference Type: Shunt (all substitutes must be shunt-type references)
Output Type: Adjustable (maintains voltage adjustment capability)
Voltage Range: 2.495V minimum to 36V maximum output
Current Capacity: 100 mA output current
Package: TO-92-3 or TO-226-3 (mechanical and pin compatibility)
Cathode Current: 1 mA nominal operation

Secondary Compatibility Criteria:

Tolerance: ±2.2% or better (tighter tolerances are acceptable)
Temperature Coefficient: 50ppm/°C or better
Operating Temperature: Must support 0°C ~ 70°C minimum range

Parts are grouped into two categories: Direct Manufacturer Equivalents (identical electrical specifications from different manufacturers or packaging variants) and Similar Parts (compatible electrical performance with improved specifications such as tighter tolerance or extended temperature range).

Parameter Comparison

Part Number	Manufacturer	Voltage Min/Max	Current Output	Tolerance	Temp Coeff	Operating Temp	Package	Status
TL431CLPRP	onsemi	2.495V / 36V	100 mA	±2.2%	50ppm/°C	0°C ~ 70°C	TO-92-3	Obsolete
TL431CLPRPG	onsemi	2.495V / 36V	100 mA	±2.2%	50ppm/°C	0°C ~ 70°C	TO-92-3	Active
TL431CLPM	Texas Instruments	2.495V / 36V	100 mA	±2.2%	Not specified	0°C ~ 70°C	TO-92-3	Active
FAN431AZXA	Fairchild Semiconductor	2.495V / 36V	100 mA	±1%	50ppm/°C	-25°C ~ 85°C	TO-92-3	Active
KA431AZTA	onsemi	2.495V / 36V	100 mA	±1%	50ppm/°C	-25°C ~ 85°C	TO-92-3	Active
KA431LZTA	onsemi	2.495V / 36V	100 mA	±0.5%	50ppm/°C	-25°C ~ 85°C	TO-92-3	Active
AS431BZTR-E1	Diodes Incorporated	2.5V / 36V	100 mA	±1%	20ppm/°C	-40°C ~ 125°C	TO-92-3	Active
AS431IAZTR-G1	Diodes Incorporated	2.5V / 36V	100 mA	±0.5%	Not specified	-40°C ~ 125°C	TO-92-3	Active
AZ431AZ-ATRE1	Diodes Incorporated	2.5V / 36V	100 mA	±0.4%	20ppm/°C	-40°C ~ 125°C	TO-92-3	Active
AZ431AZ-ATRG1	Diodes Incorporated	2.5V / 36V	100 mA	±0.4%	20ppm/°C	-40°C ~ 125°C	TO-92-3	Active
AZ431BZ-ATRE1	Diodes Incorporated	2.5V / 36V	100 mA	±0.8%	20ppm/°C	-40°C ~ 125°C	TO-92-3	Active

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical Specifications):

TL431CLPRPG from onsemi is the direct active equivalent to TL431CLPRP. This part maintains identical electrical specifications (±2.2% tolerance, 50ppm/°C temperature coefficient, 0°C ~ 70°C operating range) and package configuration. The primary difference is product status (Active vs. Obsolete) and packaging format (Cut Tape vs. standard). This is the recommended first choice for direct replacement.

TL431CLPM from Texas Instruments provides electrical equivalence with matching ±2.2% tolerance and 0°C ~ 70°C operating temperature range. Temperature coefficient specification is not provided in the data. This part is suitable for applications where Texas Instruments sourcing is preferred or required.

Compatible Substitutes with Improved Specifications:

Parts with tighter tolerance specifications (±1% or better) are electrically compatible and provide improved accuracy. FAN431AZXA (Fairchild, ±1%), KA431AZTA (onsemi, ±1%), and KA431LZTA (onsemi, ±0.5%) maintain the 2.495V minimum output voltage and support extended operating temperature ranges (-25°C ~ 85°C). These are suitable for applications requiring higher precision voltage reference performance.

Diodes Incorporated AS431 and AZ431 series parts offer the widest operating temperature range (-40°C ~ 125°C) with tolerance specifications ranging from ±0.4% to ±1%. The minimum output voltage is specified as 2.5V (versus 2.495V), which is functionally equivalent for most applications. These parts are suitable for industrial and extended-temperature applications.

Compliance Considerations:

TL431CLPRP is RoHS non-compliant. All active substitute parts listed (TL431CLPRPG, TL431CLPM, FAN431AZXA, KA431AZTA, KA431LZTA, AS431 series, AZ431 series) are ROHS3 compliant, meeting current regulatory requirements for new designs and production.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with tighter tolerance (±1% or ±0.5%) in place of the ±2.2% TL431CLPRP?

A: Yes. Tighter tolerance specifications are electrically compatible and represent improved performance. Parts with ±1% or ±0.5% tolerance will function correctly in circuits designed for ±2.2% tolerance. No circuit modifications are required.

Q: What is the difference between TL431CLPRP and TL431CLPRPG?

A: Both parts are manufactured by onsemi with identical electrical specifications. TL431CLPRP is obsolete; TL431CLPRPG is the active equivalent. The primary difference is packaging format (standard vs. Cut Tape). Electrical performance and pin configuration are identical.

Q: Are Diodes Incorporated AS431 and AZ431 parts pin-compatible with the TL431CLPRP?

A: Yes. All listed substitute parts use the TO-92-3 package with identical pin configuration. Mechanical and electrical pin compatibility is maintained across all substitutes.

Q: Can I use a part with extended operating temperature range (-40°C ~ 125°C) in a circuit designed for 0°C ~ 70°C operation?

A: Yes. Extended temperature range parts are fully compatible with circuits operating within the original 0°C ~ 70°C specification. The wider temperature range provides additional design margin and is suitable for applications with uncertain environmental conditions.

Q: What is the significance of the 2.5V versus 2.495V minimum output voltage specification?

A: Both specifications are functionally equivalent for adjustable shunt reference applications. The 2.495V specification is the typical minimum; 2.5V represents a rounded specification. For circuits requiring precise voltage references, verify the specific application tolerance requirements.

Q: Are all substitute parts RoHS compliant?

A: The original TL431CLPRP is RoHS non-compliant. All active substitute parts listed (TL431CLPRPG, TL431CLPM, and all Fairchild, onsemi KA431, and Diodes Incorporated AS431/AZ431 variants) are ROHS3 compliant, meeting current environmental and regulatory standards.

Q: Which substitute part should I select for a new design?

A: For new designs, select from active parts with ROHS3 compliance. TL431CLPRPG (onsemi) provides direct electrical equivalence. For applications requiring extended temperature operation or improved tolerance, select from the Diodes Incorporated AZ431 series (±0.4% tolerance, -40°C ~ 125°C) or onsemi KA431LZTA (±0.5% tolerance, -25°C ~ 85°C).

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