KA358A Equivalent & Substitute Parts Reference

Part Overview

The KA358A is a general-purpose operational amplifier featuring 2 circuits in an 8-DIP through-hole package, manufactured by onsemi. This device is classified as obsolete, with 3,148 units currently in stock. The KA358A 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 status, identifying equivalent and substitute parts is essential for design continuity, procurement flexibility, and long-term product support. Active alternatives with comparable electrical characteristics and compatible packaging options 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	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 KA358A is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: General Purpose
Number of Circuits: 2
Voltage Supply Range: Minimum 3V, Maximum ≥30V
Current - Input Bias: ≤45 nA
Voltage - Input Offset: ≤2 mV
Current - Output / Channel: ≥30 mA
Operating Temperature Range: 0°C to 70°C minimum
Package Compatibility: 8-DIP through-hole preferred; 8-SOIC surface-mount acceptable for redesign scenarios

Direct Substitutes (Identical Electrical Class): Parts meeting all primary criteria with general-purpose amplifier topology and matching supply voltage specifications.

Similar Substitutes (Alternative Amplifier Classes): Parts with different amplifier topologies (J-FET, current feedback, voltage feedback) that maintain compatible pin counts, package formats, and supply voltage ranges but offer enhanced performance characteristics for specific applications.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Circuits	Input Bias (nA)	Input Offset (mV)	Supply Current (µA)	Output / Ch (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Status
KA358A	onsemi	General Purpose	2	45	2	800	30	3	32	0 to 70	8-DIP	Obsolete
LM358ADR2G	onsemi	General Purpose	2	45	2	800	40	3	32	0 to 70	8-SOIC	Active
LM358AP	Texas Instruments	General Purpose	2	15	2	500	40	3	30	0 to 70	8-DIP	Active
LM258AP	Texas Instruments	General Purpose	2	15	2	500	40	3	32	-25 to 85	8-DIP	Active
LM258P	Texas Instruments	General Purpose	2	20	3	500	40	3	32	-25 to 85	8-DIP	Active
LM358N/NOPB	Texas Instruments	General Purpose	2	45	2	1000	40	3	32	0 to 70	8-DIP	Active
LM358P	Texas Instruments	General Purpose	2	20	3	500	40	3	30	0 to 70	8-DIP	Active
AD812ANZ	Analog Devices Inc.	Current Feedback	2	—	—	4500	50	2.4	36	0 to 70	8-DIP	Active
AD826ANZ	Analog Devices Inc.	Voltage Feedback	2	3300	500	6600	50	5	36	-40 to 85	8-DIP	Active
LF412CN/NOPB	Texas Instruments	J-FET	2	0.05	1	3600	—	10	40	0 to 70	8-DIP	Active
LT1169CN8#PBF	Analog Devices Inc.	J-FET	2	0.004	0.6	5300	—	9	40	0 to 70	8-DIP	Active

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (8-DIP Through-Hole):

The LM358N/NOPB (Texas Instruments) provides the closest electrical match to the KA358A. Both devices feature identical input bias current (45 nA), input offset voltage (2 mV), and supply voltage range (3V to 32V). The LM358N/NOPB is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. This part is recommended for applications requiring minimal design modification.

The LM358AP and LM358P (Texas Instruments) are also suitable alternatives in 8-DIP packaging. Both maintain the 3V to 32V supply range and 2 mV input offset specification. The LM358AP operates within the identical 0°C to 70°C temperature range as the KA358A, while the LM358P extends operation to -25°C to 85°C for enhanced temperature performance.

For Surface-Mount Redesign (8-SOIC):

The LM358ADR2G (onsemi) offers equivalent electrical performance in a surface-mount 8-SOIC package. This device maintains 45 nA input bias current, 2 mV input offset voltage, and 3V to 32V supply range. Active production status and ROHS3 compliance ensure long-term availability.

For Enhanced Performance Applications:

The LF412CN/NOPB (Texas Instruments, J-FET topology) and LT1169CN8#PBF (Analog Devices Inc., J-FET topology) provide superior input bias current characteristics (50 pA and 4 pA respectively) suitable for high-impedance signal conditioning. Both maintain 8-DIP through-hole packaging and active production status. These alternatives require application-specific evaluation due to different amplifier topology and higher supply voltage minimums (10V and 9V respectively).

The AD812ANZ (Analog Devices Inc., current feedback topology) and AD826ANZ (Analog Devices Inc., voltage feedback topology) offer enhanced bandwidth and slew rate performance for video and high-frequency applications. Both are available in 8-DIP packaging with active production status.

Compliance and Certification:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, matching the KA358A regulatory profile. Moisture sensitivity level (MSL) ratings are consistent across all alternatives at MSL 1 (Unlimited).

Frequently Asked Questions (FAQ)

Q1: Can the LM358ADR2G replace the KA358A in existing through-hole PCB designs?

The LM358ADR2G is a surface-mount 8-SOIC device and cannot be directly soldered into through-hole 8-DIP footprints without adapter hardware or PCB redesign. For through-hole applications, select LM358N/NOPB, LM358AP, or LM358P instead.

Q2: What is the primary difference between the LM358N/NOPB and LM358P?

Both devices are general-purpose dual operational amplifiers in 8-DIP packaging from Texas Instruments. The LM358N/NOPB features 45 nA input bias current and 1 mA supply current, matching the KA358A input bias specification more closely. The LM358P features 20 nA input bias current and 500 µA supply current per channel, offering lower power consumption. Both operate within 0°C to 70°C and maintain 3V to 32V supply range compatibility.

Q3: Are J-FET amplifiers (LF412CN/NOPB, LT1169CN8#PBF) direct substitutes for the KA358A?

J-FET amplifiers are not direct substitutes due to different amplifier topology and higher minimum supply voltage requirements (10V and 9V respectively, versus 3V for the KA358A). However, they are compatible in 8-DIP packaging and offer superior input bias current performance (50 pA and 4 pA). Selection depends on application requirements for input impedance and bias current characteristics.

Q4: What is the significance of the 45 nA input bias current specification?

Input bias current determines the DC current flowing into the amplifier's non-inverting and inverting inputs. The 45 nA specification of the KA358A is typical for bipolar junction transistor (BJT) input stage designs. Lower values (15-20 nA) indicate improved input stage design; higher values (3.3 µA) indicate different topologies such as CMOS or voltage feedback designs. Application circuits with high-impedance sources may require lower bias current alternatives.

Q5: Can the AD826ANZ replace the KA358A?

The AD826ANZ is a voltage feedback amplifier with significantly different electrical characteristics: 3.3 µA input bias current (versus 45 nA), 500 µV input offset voltage (versus 2 mV), and 6.6 mA supply current (versus 800 µA). Additionally, the minimum supply voltage is 5V (versus 3V). This device is not recommended as a direct substitute but may be suitable for applications requiring higher bandwidth (50 MHz) and lower input offset voltage.

Q6: What packaging options are available for KA358A substitutes?

Through-hole 8-DIP packaging is available from LM358N/NOPB, LM358AP, LM358P, AD812ANZ, AD826ANZ, LF412CN/NOPB, and LT1169CN8#PBF. Surface-mount 8-SOIC packaging is available from LM358ADR2G. Selection depends on PCB design requirements and manufacturing capabilities.

Q7: Are all substitute parts ROHS3 compliant?

Yes. All recommended substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the KA358A.

Q8: Which substitute offers the best inventory availability?

The LM358P (Texas Instruments) has the highest inventory level at 53,800 units in stock, followed by LF412CN/NOPB at 44,180 units and LM358ADR2G at 45,400 units. These parts offer immediate procurement availability for high-volume applications.

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