KA301A Equivalent & Substitute Parts

Part Overview

The KA301A is a general-purpose operational amplifier manufactured by onsemi, housed in an 8-DIP through-hole package. This device is classified as obsolete, indicating it is no longer in active production. The KA301A features a single amplifier circuit with a slew rate of 10V/µs and is designed for general-purpose amplification applications operating across a 0°C to 70°C temperature range. Due to its obsolete status, identifying equivalent substitute parts is necessary for ongoing system maintenance, design updates, and procurement continuity.

Substiute Parts

KA301A

onsemiIn Stock: 3484KA301A Datasheet

Current PartRFQ

LM318P

Texas InstrumentsIn Stock: 14371LM318P Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KA301A is determined by functional equivalence across the following critical parameters:

Functional Compatibility Criteria:

• Amplifier Type: General Purpose (identical classification)
• Number of Circuits: 1 (single amplifier configuration)
• Package / Case: 8-DIP (0.300", 7.62mm) (identical physical form factor)
• Mounting Type: Through Hole (identical mounting technology)
• Operating Temperature Range: 0°C ~ 70°C (identical operating envelope)

The LM318P from Texas Instruments satisfies all functional compatibility requirements. While the LM318P exhibits enhanced electrical performance characteristics (higher slew rate, greater bandwidth, and higher supply voltage span), it maintains pin-compatible 8-DIP packaging and operates within the specified temperature range. The substitute part is classified as active product status, ensuring ongoing availability and supply chain reliability.

Parameter Comparison

Engineering Selection Recommendations

The LM318P is a direct functional substitute for the KA301A based on the following engineering criteria:

Package and Mechanical Compatibility: Both devices utilize identical 8-DIP through-hole packaging with 0.300" (7.62mm) spacing, enabling direct socket replacement without PCB modification.

Electrical Operating Envelope: Both parts operate across the identical 0°C to 70°C temperature range and maintain general-purpose amplifier classification with single-circuit configuration.

Product Status and Supply Chain: The LM318P holds active product status from Texas Instruments, ensuring long-term availability and supply chain continuity. The KA301A's obsolete classification necessitates transition to an active equivalent.

Regulatory Compliance: Both parts maintain REACH Unaffected status. The LM318P additionally carries ROHS3 Compliance certification, meeting current environmental and regulatory requirements for new designs and procurement.

Performance Characteristics: The LM318P demonstrates superior electrical performance with increased slew rate (70V/µs versus 10V/µs), expanded bandwidth (15 MHz), and extended supply voltage span (10V to 40V). These enhancements provide design margin and improved performance in applications where the KA301A was previously specified.

Frequently Asked Questions (FAQ)

Q: Can the LM318P directly replace the KA301A in existing designs?

A: Yes. The LM318P is pin-compatible with the KA301A in 8-DIP through-hole applications. Both devices feature identical package geometry and pin configuration, enabling direct socket substitution. The enhanced performance characteristics of the LM318P do not create backward compatibility issues in applications designed for the KA301A.

Q: What are the key differences between the KA301A and LM318P?

A: The primary differences are product status and electrical performance. The KA301A is obsolete; the LM318P is active. The LM318P exhibits higher slew rate (70V/µs versus 10V/µs), greater bandwidth (15 MHz), higher input bias current (150 nA versus 60 nA), and higher supply current (5mA versus 2mA). The LM318P also supports extended supply voltage range (10V to 40V).

Q: Are there packaging differences between these parts?

A: Both parts use 8-DIP through-hole packaging with identical 0.300" (7.62mm) spacing. The KA301A is supplied in standard DIP format; the LM318P is supplied in 8-PDIP format. Both are mechanically and electrically compatible in 8-DIP socket applications.

Q: Does the LM318P require different circuit design considerations?

A: The LM318P's superior slew rate and bandwidth may require review of compensation networks and feedback configurations in high-frequency applications. However, circuits designed for the KA301A will function with the LM318P without modification. Applications sensitive to input bias current or offset voltage may require evaluation due to the LM318P's higher specified values.

Q: What is the regulatory status of the LM318P?

A: The LM318P is ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements. The KA301A is REACH Unaffected but does not carry RoHS certification, making the LM318P preferable for new designs subject to environmental compliance mandates.

Q: Is the LM318P suitable for long-term production use?

A: Yes. The LM318P's active product status from Texas Instruments ensures ongoing manufacturing, availability, and technical support. This makes it suitable for long-term production and design continuity where the obsolete KA301A cannot be reliably sourced.