LM431CCZ Equivalent & Substitute Parts

Part Overview

The LM431CCZ is an adjustable shunt voltage reference IC manufactured by onsemi, designed for precision voltage regulation applications. This TO-92-3 packaged component delivers a fixed output voltage of 2.495V with ±0.5% tolerance and supports output currents up to 100 mA across a 36V maximum operating range. The part is currently active in production with 12,900 units in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers offer improved specifications, or when design requirements demand enhanced performance characteristics such as tighter tolerance, extended temperature range, or lower temperature coefficient.

Key Parameters

Parameter	LM431CCZ
Reference Type	Shunt
Output Type	Adjustable
Voltage - Output (Min/Fixed)	2.495V
Voltage - Output (Max)	36V
Current - Output	100 mA
Tolerance	±0.5%
Temperature Coefficient	50ppm/°C Typical
Current - Cathode	1 mA
Operating Temperature	-25°C ~ 85°C
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LM431CCZ is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Reference Type: Shunt (all substitutes must be shunt-type references)
Output Type: Adjustable (functional equivalence requires adjustable output)
Voltage Range: Output voltage must span or encompass 2.495V minimum and 36V maximum
Current Rating: Output current must support 100 mA minimum
Package: TO-92-3 or TO-226-3 (mechanical and pin compatibility)
Mounting: Through Hole (PCB assembly compatibility)

Performance Parameters (Tolerance, Temperature Coefficient, Operating Range): These parameters define performance tier equivalence. Parts with equal or superior specifications (tighter tolerance, lower temperature coefficient, wider operating temperature range) are direct substitutes. Parts with relaxed specifications may be acceptable depending on application requirements.

Compliance Parameters: RoHS3 compliance and REACH unaffected status ensure regulatory equivalence for new designs.

Parameter Comparison

Part Number	Manufacturer	Tolerance	Temp Coeff	Operating Temp	Cathode Current	Product Status	Inventory
LM431CCZ	onsemi	±0.5%	50ppm/°C	-25°C ~ 85°C	1 mA	Active	12,900 Pcs
TL431AILPG	onsemi	±1%	50ppm/°C	-40°C ~ 85°C	1 mA	Active	3,100 Pcs
TL431BILPG	onsemi	±0.4%	50ppm/°C	-40°C ~ 85°C	1 mA	Active	1,629 Pcs
TL431ILPG	onsemi	±2.2%	50ppm/°C	-40°C ~ 85°C	1 mA	Active	5,798 Pcs
LM431CCZ/NOPB	National Semiconductor	-0.6%, +0.4%	50ppm/°C	0°C ~ 70°C	1 mA	Active	9,985 Pcs
AS431AZTR-E1	Diodes Incorporated	±0.5%	20ppm/°C	-40°C ~ 125°C	1 mA	Active	117,200 Pcs
AS431IAZTR-G1	Diodes Incorporated	±0.5%	—	-40°C ~ 125°C	50 µA	Active	56,350 Pcs
TL1431CLP	Texas Instruments	±0.4%	—	0°C ~ 70°C	1 mA	Active	5,458 Pcs
TL1431CLPE3	Texas Instruments	±0.4%	—	0°C ~ 70°C	1 mA	Obsolete	3,759 Pcs
TL1431IZ	STMicroelectronics	±0.4%	100ppm/°C	-40°C ~ 105°C	1 mA	Active	2,800 Pcs
TL431AILP	Toshiba Semiconductor and Storage	—	—	—	—	Active	5,995 Pcs

Engineering Selection Recommendations

Direct Equivalents (Identical or Superior Specifications):

TL431BILPG (onsemi) provides superior tolerance (±0.4% vs ±0.5%) while maintaining identical temperature coefficient and cathode current specifications. Extended operating temperature range (-40°C ~ 85°C) accommodates wider environmental conditions. Active production status and ROHS3 compliance ensure long-term availability and regulatory compliance.

AS431AZTR-E1 (Diodes Incorporated) matches tolerance (±0.5%) with superior temperature coefficient (20ppm/°C vs 50ppm/°C) and extended operating range (-40°C ~ 125°C). Highest inventory availability (117,200 units) provides supply security. ROHS3 compliant with MSL 1 rating.

TL1431CLP (Texas Instruments) delivers tighter tolerance (±0.4%) with identical cathode current specification. Active production status and ROHS3 compliance confirmed. Operating temperature range (0°C ~ 70°C) is narrower than the primary part.

Acceptable Substitutes (Relaxed Specifications):

TL431AILPG (onsemi) features relaxed tolerance (±1%) but extends operating temperature range to -40°C ~ 85°C. Suitable for applications where ±1% tolerance is acceptable.

TL431ILPG (onsemi) provides the widest operating range (-40°C ~ 85°C) with relaxed tolerance (±2.2%). Appropriate only for applications with loose tolerance requirements.

Not Recommended:

TL1431CLPE3 (Texas Instruments) carries obsolete product status despite available inventory. New designs should avoid this part.

LM431CCZ/NOPB (National Semiconductor) exhibits narrower operating temperature range (0°C ~ 70°C) compared to the primary part (-25°C ~ 85°C), limiting applicability in extended temperature environments.

AS431IAZTR-G1 (Diodes Incorporated) specifies reduced cathode current (50 µA vs 1 mA), which may affect circuit biasing requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute TL431BILPG for LM431CCZ in my design?

A: Yes. TL431BILPG is a direct substitute with superior tolerance (±0.4% vs ±0.5%), identical temperature coefficient (50ppm/°C), and extended operating temperature range (-40°C ~ 85°C vs -25°C ~ 85°C). All electrical and mechanical parameters are compatible. Both parts are ROHS3 compliant and in active production.

Q: What is the difference between AS431AZTR-E1 and LM431CCZ?

A: Both parts share identical tolerance (±0.5%) and output current rating (100 mA). AS431AZTR-E1 offers superior temperature coefficient (20ppm/°C vs 50ppm/°C) and extended operating range (-40°C ~ 125°C vs -25°C ~ 85°C). Packaging is mechanically compatible (TO-92-3). AS431AZTR-E1 provides higher inventory availability and improved thermal stability.

Q: Why is TL1431CLPE3 not recommended?

A: TL1431CLPE3 carries obsolete product status. While inventory remains available (3,759 units), new designs should specify active production parts to ensure long-term supply continuity and manufacturer support.

Q: Can I use TL431AILPG if my application requires ±0.5% tolerance?

A: No. TL431AILPG specifies ±1% tolerance, which exceeds the ±0.5% requirement of LM431CCZ. Use TL431BILPG, AS431AZTR-E1, or TL1431CLP instead, which all meet or exceed the ±0.5% tolerance specification.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts except TL431AILP (Toshiba) confirm ROHS3 compliance. TL431AILP specifications are incomplete in available documentation. Verify RoHS compliance status with the manufacturer before design implementation.

Q: What is the significance of cathode current differences?

A: Cathode current (1 mA vs 50 µA) affects circuit biasing and reference stability. LM431CCZ specifies 1 mA cathode current. AS431IAZTR-G1 specifies 50 µA, which may require circuit redesign to maintain proper biasing. Verify cathode current compatibility with your reference circuit design.

Q: Can I use parts with narrower operating temperature ranges?

A: Only if your application operates within the specified range. LM431CCZ operates -25°C ~ 85°C. LM431CCZ/NOPB and TL1431CLP limit operation to 0°C ~ 70°C. Verify your application's thermal requirements before substitution.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message