KA431AZTA_F081 Equivalent & Substitute Parts

Part Overview

The KA431AZTA_F081 is a shunt voltage reference IC manufactured by onsemi, designed for precision voltage regulation applications. This adjustable reference provides a fixed output of 2.495V with a maximum output capability of 36V at 100mA, featuring ±1% tolerance and a temperature coefficient of 50ppm/°C typical. The device is packaged in TO-92-3 (TO-226AA) through-hole configuration.

The KA431AZTA_F081 is classified as obsolete. Equivalent substitute parts are available from active product lines that maintain identical electrical and mechanical specifications, ensuring direct replacement capability in existing designs.

Substiute Parts

KA431AZTA_F081

onsemiIn Stock: 1012KA431AZTA_F081 Datasheet

Current PartRFQ

KA431AZBU

Fairchild SemiconductorIn Stock: 1514KA431AZBU Datasheet

SimilarRFQ

FAN431AZXA

Fairchild SemiconductorIn Stock: 6997FAN431AZXA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the KA431AZTA_F081 are qualified based on strict equivalence across the following critical parameters:

• Reference Type: Shunt
• Output Type: Adjustable
• Voltage - Output (Min/Fixed): 2.495V
• Voltage - Output (Max): 36V
• Current - Output: 100mA
• Tolerance: ±1%
• Temperature Coefficient: 50ppm/°C Typical
• Current - Cathode: 1mA
• Operating Temperature: -25°C ~ 85°C (TA)
• Mounting Type: Through Hole
• Package / Case: TO-226-3, TO-92-3 (TO-226AA)

All substitute parts listed maintain identical electrical performance and mechanical compatibility with the original specification. Substitution is valid for direct board-level replacement without circuit modification.

Parameter Comparison

Engineering Selection Recommendations

The KA431AZBU (Fairchild Semiconductor) and FAN431AZXA (Fairchild Semiconductor) are direct electrical and mechanical equivalents to the obsolete KA431AZTA_F081. Both substitute parts are classified as active products, ensuring long-term availability and supply chain continuity.

Selection between KA431AZBU and FAN431AZXA is based on inventory availability and procurement requirements. Both parts satisfy identical parametric specifications and regulatory compliance (REACH Unaffected status). The choice between these two substitutes does not affect circuit performance or board-level compatibility.

Frequently Asked Questions (FAQ)

Q: Can KA431AZBU or FAN431AZXA be used as direct replacements for KA431AZTA_F081?

A: Yes. Both substitute parts are parametrically equivalent across all critical electrical and mechanical specifications, including voltage output range, current rating, tolerance, temperature coefficient, and TO-92-3 package configuration. Direct board-level substitution is valid without circuit modification.

Q: What is the difference between KA431AZBU and FAN431AZXA?

A: Both parts are parametrically identical. The primary difference is manufacturer designation: KA431AZBU uses the KA431 base product number (Fairchild), while FAN431AZXA uses the FAN431 base product number (Fairchild). Electrical performance and package specifications are equivalent.

Q: Are there any compliance or regulatory differences between these parts?

A: All three parts maintain REACH Unaffected status. The original KA431AZTA_F081 carries MSL rating of 1 (Unlimited). Substitute parts from Fairchild are suitable for equivalent applications without additional compliance considerations.

Q: Why is the KA431AZTA_F081 listed as obsolete?

A: The KA431AZTA_F081 is no longer in active production. However, parametrically equivalent alternatives from active product lines are available, ensuring design continuity and component availability for existing applications.

Q: Does package configuration affect substitution?

A: No. All parts use identical TO-92-3 (TO-226AA) through-hole packaging with formed leads. Pin configuration and mechanical fit are equivalent across all three parts.