KA4558 Equivalent & Substitute Parts

Part Overview

The KA4558 is a general purpose operational amplifier integrated circuit manufactured by onsemi, configured as a dual-channel amplifier in an 8-DIP package. This device is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design requirements and production continuity. The KA4558 operates across a supply voltage span of 44V with a slew rate of 1.2V/µs and input bias current of 30nA, making it suitable for general-purpose amplification applications requiring through-hole mounting.

Key Parameters

Parameter	KA4558 Value
Manufacturer	onsemi
Amplifier Type	General Purpose
Number of Circuits	2
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Slew Rate	1.2V/µs
Current - Input Bias	30 nA
Voltage - Input Offset	2 mV
Current - Supply	3.5mA (x2 Channels)
Voltage - Supply Span	44 V
Operating Temperature	0°C ~ 70°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the KA4558 is determined by the following critical parameters:

Primary Compatibility Criteria:

Package type: 8-DIP (0.300", 7.62mm) through-hole configuration
Circuit count: Dual-channel (2 circuits)
Amplifier classification: General purpose operational amplifier
Pin-to-pin compatibility with 8-DIP footprint

Secondary Compatibility Criteria:

Supply voltage range compatibility (minimum 44V span or greater)
Input bias current within acceptable range for application
Input offset voltage specification
Operating temperature range coverage
Slew rate performance characteristics
Current supply requirements per channel

Substitute parts are grouped into two categories: Direct Substitutes (pin-compatible replacements with equivalent or superior electrical characteristics) and Similar Substitutes (functionally equivalent devices with comparable performance parameters but potentially different electrical specifications requiring application verification).

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	Input Bias (nA)	Input Offset (mV)	Supply Current (mA)	Supply Span (V)	Temp Range (°C)	Package
KA4558	onsemi	Obsolete	1.2	30	2	3.5	44	0 ~ 70	8-DIP
RC4558P	Texas Instruments	Active	1.7	150	0.5	2.5	10 ~ 30	0 ~ 70	8-DIP
AS358P-E1	Diodes Incorporated	Active	—	20	2	0.7	3 ~ 36	-40 ~ 85	8-DIP
BA15218	Rohm Semiconductor	Active	3	50	0.5	5	4 ~ 32	-40 ~ 85	8-DIP
CA3240AEZ	Renesas Electronics Corporation	Active	9	0.01	2	8	4 ~ 36	-40 ~ 85	8-DIP
LF412ACN/NOPB	Texas Instruments	Active	15	0.05	0.5	3.6	10 ~ 44	0 ~ 70	8-DIP
LM1458N/NOPB	Texas Instruments	Active	0.5	200	1	3	36	0 ~ 70	8-DIP
LM258P	Texas Instruments	Active	0.3	20	3	0.5	3 ~ 32	-25 ~ 85	8-DIP
LM358AN/NOPB	Texas Instruments	Active	—	45	2	1	3 ~ 32	0 ~ 70	8-DIP
LM358N/NOPB	Texas Instruments	Active	—	45	2	1	3 ~ 32	0 ~ 70	8-DIP
LM358P	Texas Instruments	Active	0.3	20	3	0.5	3 ~ 30	0 ~ 70	8-DIP

Engineering Selection Recommendations

Direct Substitution Candidates:

The RC4558P (Texas Instruments) provides the closest functional equivalence to the KA4558, offering active product status with identical 8-DIP package configuration and dual-channel general-purpose amplifier architecture. Both devices maintain 0°C to 70°C operating temperature alignment. The RC4558P demonstrates improved slew rate performance (1.7V/µs versus 1.2V/µs) and lower supply current requirements (2.5mA versus 3.5mA). However, the RC4558P operates within a 10V to 30V supply span, which is narrower than the KA4558's 44V specification. This substitution is applicable only in applications where the reduced supply voltage range is acceptable.

Extended Supply Voltage Applications:

For applications requiring the full 44V supply span capability of the KA4558, the LF412ACN/NOPB (Texas Instruments) maintains identical 10V to 44V supply range with superior slew rate performance (15V/µs). This J-FET amplifier variant operates within the same 0°C to 70°C temperature range and 8-DIP package format. The LF412ACN/NOPB is classified as active product status with ROHS3 compliance.

Low-Voltage General-Purpose Applications:

The LM358P and LM258P (Texas Instruments) are active general-purpose dual-channel amplifiers in 8-DIP packages suitable for applications operating at reduced supply voltages (3V to 32V or 3V to 30V respectively). Both devices provide ROHS3 compliance and extended temperature range options. The LM358P maintains the same 0°C to 70°C operating window as the KA4558.

All substitute candidates listed are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can the RC4558P directly replace the KA4558 in all applications?

A: The RC4558P provides pin-compatible replacement in 8-DIP package format with dual-channel general-purpose amplifier configuration. However, the RC4558P supply voltage range (10V to 30V) is narrower than the KA4558 (44V). Direct substitution is valid only for applications operating within the 10V to 30V supply range.

Q: What is the primary difference between the KA4558 and LM358 series devices?

A: The KA4558 and LM358 series (LM358AN/NOPB, LM358N/NOPB, LM358P) share identical 8-DIP package configuration and dual-channel general-purpose amplifier topology. The LM358 series operates at lower supply voltages (3V to 32V) with reduced supply current consumption (1mA or 0.5mA per channel). The KA4558 requires 44V supply span and 3.5mA supply current per channel.

Q: Is the CA3240AEZ suitable as a KA4558 substitute?

A: The CA3240AEZ is an active general-purpose dual-channel amplifier in 8-DIP package with extended operating temperature range (-40°C to 85°C). It provides superior slew rate performance (9V/µs) and extremely low input bias current (10pA). The CA3240AEZ operates within 4V to 36V supply range, which does not encompass the full 44V specification of the KA4558. Substitution is applicable for applications requiring enhanced performance characteristics within the 4V to 36V supply window.

Q: What are the key electrical parameters that determine KA4558 substitutability?

A: Substitution compatibility is determined by: (1) 8-DIP through-hole package format, (2) dual-channel amplifier configuration, (3) general-purpose amplifier classification, (4) supply voltage range encompassing or exceeding 44V, (5) input bias current and input offset voltage specifications compatible with application requirements, and (6) operating temperature range coverage of 0°C to 70°C minimum.

Q: Are all listed substitute parts ROHS3 compliant?

A: All substitute parts listed in the parameter comparison table are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement and assembly.

Q: What is the significance of the KA4558 obsolete status?

A: The KA4558 is classified as obsolete, indicating that onsemi has discontinued manufacturing and support for this component. Active substitute components must be identified for new designs and production continuity. All substitute parts listed maintain active product status with ongoing manufacturer support and availability.

Q: Can the LF412ACN/NOPB replace the KA4558 in high-voltage applications?

A: The LF412ACN/NOPB is a J-FET amplifier variant that maintains the 10V to 44V supply voltage range of the KA4558 and operates within the identical 0°C to 70°C temperature window. The LF412ACN/NOPB provides superior slew rate performance (15V/µs) and extremely low input bias current (50pA). This device is suitable for high-voltage applications requiring J-FET amplifier characteristics within the 44V supply specification.

Q: What packaging considerations apply to KA4558 substitution?

A: All substitute parts listed utilize 8-DIP (0.300", 7.62mm) through-hole package format, maintaining identical PCB footprint and mounting compatibility with the KA4558. No package conversion or board redesign is required for mechanical substitution.

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