KA358 Equivalent & Substitute Parts

Part Overview

The KA358 is a general-purpose operational amplifier featuring two independent circuits in an 8-DIP through-hole package. Manufactured by onsemi, this device is classified as obsolete, though 3700 units remain in stock. The KA358 operates across a wide supply voltage range of 3V to 32V and is suitable for general-purpose amplification applications requiring dual-channel configurations.

Due to its obsolete product status, identifying equivalent and substitute parts is necessary for design continuity, long-term availability assurance, and potential cost optimization. Active alternatives with comparable electrical characteristics and compatible packaging are available from multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Current - Input Bias	45	nA
Voltage - Input Offset	2.9	mV
Current - Supply	800	µA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	32	V
Operating Temperature	0 to 70	°C
Package / Case	8-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the KA358 is determined by the following critical parameters:

Package Compatibility: The KA358 uses an 8-DIP through-hole package. Direct substitutes must maintain this form factor for board-level compatibility without redesign.

Electrical Characteristics: Substitute parts must support the dual-circuit (2-channel) configuration and operate within the 3V to 32V supply voltage range. Input bias current, input offset voltage, and output current per channel are secondary selection criteria that determine performance equivalence.

Amplifier Classification: General-purpose operational amplifiers are the primary substitute category. Specialized amplifier types (current feedback, J-FET input) are listed as alternatives only when they meet the core electrical requirements.

Product Status: Active parts are preferred over obsolete alternatives to ensure long-term availability and supply chain stability.

Substitute parts are grouped into two categories:

Direct Equivalents (8-DIP Through-Hole, General Purpose): Parts maintaining identical package and amplifier type classification.
Functional Alternatives (8-DIP Through-Hole, Specialized Types): Parts with different amplifier architectures but compatible electrical operating ranges and package form factors.

Parameter Comparison

Part Number	Manufacturer	Product Status	Amplifier Type	Number of Circuits	Input Bias (nA)	Input Offset (mV)	Supply Current (µA)	Output Current/Ch (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package
KA358	onsemi	Obsolete	General Purpose	2	45	2.9	800	30	3	32	0 to 70	8-DIP
LM358AN/NOPB	Texas Instruments	Active	General Purpose	2	45	2	1000	40	3	32	0 to 70	8-DIP
LM358AP	Texas Instruments	Active	General Purpose	2	15	2	500	40	3	30	0 to 70	8-DIP
LM258AP	Texas Instruments	Active	General Purpose	2	15	2	500	40	3	32	-25 to 85	8-DIP
LM258P	Texas Instruments	Active	General Purpose	2	20	3	500	40	3	32	-25 to 85	8-DIP
CA3240AEZ	Renesas Electronics Corporation	Active	General Purpose	2	0.01	2	8000	40	4	36	-40 to 85	8-DIP
BA15218	Rohm Semiconductor	Active	General Purpose	2	50	0.5	5000	50	4	32	-40 to 85	8-DIP
LF353N/NOPB	Texas Instruments	Active	J-FET	2	0.05	5	3600	—	10	36	0 to 70	8-DIP
LF353P	Texas Instruments	Active	J-FET	2	0.05	5	3600	40	7	36	0 to 70	8-DIP
AD812ANZ	Analog Devices Inc.	Active	Current Feedback	2	—	—	4500	50	2.4	36	—	8-DIP

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

The LM358AN/NOPB from Texas Instruments is the primary substitute for the KA358. Both devices share identical input bias current (45 nA), comparable input offset voltage (2 mV vs. 2.9 mV), and matching supply voltage range (3V to 32V). The LM358AN/NOPB is active in production with high inventory availability (20,314 units), ensuring long-term supply continuity. Both parts are ROHS3 compliant and carry identical REACH and ECCN classifications.

For Extended Temperature Range Applications:

The LM258AP and LM258P from Texas Instruments extend the operating temperature range to -25°C to 85°C, compared to the KA358's 0°C to 70°C specification. These parts maintain the 3V to 32V supply voltage range and 8-DIP package form factor. Supply current is reduced to 500µA (x2 channels), offering improved power efficiency. Both are active products with substantial inventory.

For Superior Input Characteristics:

The CA3240AEZ from Renesas Electronics Corporation provides exceptionally low input bias current (10 pA) and operates across an extended supply range (4V to 36V). This part is suitable for applications requiring minimal input loading. Operating temperature range extends to -40°C to 85°C. The 8-DIP through-hole package maintains board compatibility.

For Precision Input Offset Voltage:

The BA15218 from Rohm Semiconductor offers the lowest input offset voltage (500 µV) among available substitutes, with comparable input bias current (50 nA). This device supports the full 4V to 32V supply range and operates across -40°C to 85°C. Higher output current per channel (50 mA) provides additional drive capability.

For High-Impedance Input Applications:

The LF353N/NOPB and LF353P from Texas Instruments employ J-FET input stages, providing input bias current in the picoampere range (50 pA). These parts are suitable for applications requiring minimal input loading. The LF353P variant includes specified output current per channel (40 mA). Minimum supply voltage is 7V to 10V, requiring verification against circuit requirements.

For High-Speed Applications:

The AD812ANZ from Analog Devices Inc. is a current feedback amplifier with 145 MHz bandwidth and 1600V/µs slew rate, significantly exceeding general-purpose specifications. This part is suitable for video and high-frequency signal processing applications. Supply voltage range is 2.4V to 36V (single/dual). Product status is active with 1,370 units in inventory.

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, consistent with the KA358 regulatory classification.

Frequently Asked Questions (FAQ)

Q: Can the LM358AN/NOPB directly replace the KA358 without circuit modification?

A: Yes. The LM358AN/NOPB shares identical input bias current (45 nA), comparable input offset voltage, and matching supply voltage range (3V to 32V). Both use the 8-DIP through-hole package. No circuit redesign is required for direct substitution in applications operating within 0°C to 70°C.

Q: What is the primary difference between the KA358 and LM358 series parts?

A: The KA358 is obsolete, while LM358 variants (LM358AN/NOPB, LM358AP) are active products. Electrical characteristics are nearly identical. The LM358 series offers superior supply chain availability and long-term production continuity.

Q: Why would I select the LM258 series over the LM358 series?

A: The LM258AP and LM258P extend the operating temperature range to -25°C to 85°C and reduce supply current to 500µA (x2 channels), improving power efficiency. Select LM258 variants for applications requiring extended temperature operation or lower power consumption.

Q: Are J-FET input amplifiers (LF353) suitable replacements for the KA358?

A: J-FET amplifiers like the LF353N/NOPB and LF353P are functional alternatives, not direct replacements. They provide superior input characteristics (50 pA input bias current) but require minimum supply voltages of 7V to 10V. Verify circuit supply voltage compatibility before substitution.

Q: What is the significance of the CA3240AEZ's 10 pA input bias current?

A: The CA3240AEZ provides exceptionally low input bias current, minimizing input loading effects. This characteristic is critical for high-impedance signal sources and precision measurement circuits. The trade-off is higher supply current (8mA x2 channels) compared to the KA358 (800µA).

Q: Can the AD812ANZ replace the KA358 in general-purpose applications?

A: The AD812ANZ is a current feedback amplifier optimized for high-speed and video applications, not general-purpose use. While it maintains 8-DIP through-hole packaging and dual-circuit configuration, its 145 MHz bandwidth and 1600V/µs slew rate exceed general-purpose requirements. Use only when high-frequency performance is specified.

Q: What packaging alternatives exist if through-hole mounting is not required?

A: The LM358DR2G from onsemi provides equivalent electrical performance in an 8-SOIC surface-mount package. This option is suitable for new designs prioritizing board space efficiency. Existing through-hole designs require the 8-DIP package form factor.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the KA358 regulatory classification. Compliance documentation is available from respective manufacturers.

Q: What is the minimum supply voltage for the LF353 series?

A: The LF353N/NOPB requires a minimum supply voltage of 10V, while the LF353P requires 7V. The KA358 operates at 3V minimum. Verify circuit supply voltage before selecting J-FET alternatives.

Q: How does the BA15218 compare to the KA358 in terms of input offset voltage?

A: The BA15218 provides superior input offset voltage specification (500 µV) compared to the KA358 (2.9 mV), representing approximately 5.8× improvement. This advantage is significant for precision analog circuits requiring minimal DC offset.

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