KA258 Equivalent & Substitute Parts

Part Overview

The KA258 is a general-purpose operational amplifier featuring two circuits in an 8-DIP package, manufactured by onsemi. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The KA258 operates across a supply voltage range of 3V to 32V with an operating temperature range of -25°C to 85°C, delivering 30mA output per channel and drawing 800µA supply current. Locating compatible alternatives ensures design flexibility and access to active product lines with extended availability.

Key Parameters

Parameter	KA258 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	-25 to 85	°C
Package / Case	8-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the KA258 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Amplifier Type: General Purpose (required match)
Number of Circuits: 2 (required match)
Package / Case: 8-DIP (0.300", 7.62mm) (required match)
Mounting Type: Through Hole (required match)
Voltage - Supply Span (Min): 3V minimum (required match or better)
Voltage - Supply Span (Max): 32V maximum (required match or better)
Current - Output / Channel: 30mA minimum (required match or better)

Secondary Compatibility Parameters:

Current - Input Bias: 45nA (substitute must not exceed significantly)
Voltage - Input Offset: 2.9mV (substitute must remain within acceptable range)
Operating Temperature: -25°C to 85°C (substitute must cover or exceed this range)

Substitute parts are grouped into two categories: Direct Substitutes (general-purpose amplifiers matching all primary criteria) and Similar Substitutes (parts meeting core electrical and mechanical requirements with minor parameter variations acceptable for most applications).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Number of Circuits	Current - Input Bias (nA)	Voltage - Input Offset (mV)	Current - Supply (µA)	Current - Output / Channel (mA)	Voltage - Supply Min (V)	Voltage - Supply Max (V)	Operating Temp (°C)	Product Status
KA258	onsemi	General Purpose	2	45	2.9	800	30	3	32	-25 to 85	Obsolete
LM258P	Texas Instruments	General Purpose	2	20	3	500	40	3	32	-25 to 85	Active
AS358P-E1	Diodes Incorporated	General Purpose	2	20	2	700	40	3	36	-40 to 85	Active
LM258AP	Texas Instruments	General Purpose	2	15	2	500	40	3	32	-25 to 85	Active
LM358AN/NOPB	Texas Instruments	General Purpose	2	45	2	1000	40	3	32	0 to 70	Active
LM358AP	Texas Instruments	General Purpose	2	15	2	500	40	3	30	0 to 70	Active
LM358N/NOPB	Texas Instruments	General Purpose	2	45	2	1000	40	3	32	0 to 70	Active
LM358P	Texas Instruments	General Purpose	2	20	3	500	40	3	30	0 to 70	Active
LT1208CN8#PBF	Linear Technology	General Purpose	2	4000	1	7000	40	5	30	0 to 70	Active
AD826ANZ	Analog Devices Inc.	Voltage Feedback	2	3300	0.5	6600	50	5	36	-40 to 85	Active
NJM5532DD	Nisshinbo Micro Devices Inc.	General Purpose	2	200	0.5	9000	38	6	44	-20 to 75	Active

Engineering Selection Recommendations

Tier 1 - Preferred Direct Substitutes (Active Product Status):

The LM258P and LM258AP from Texas Instruments represent the most direct substitutes for the KA258. Both devices maintain general-purpose amplifier classification, dual-circuit configuration, and 8-DIP packaging. The LM258P operates across the full -25°C to 85°C temperature range matching the KA258 specification, while delivering superior output current (40mA versus 30mA) and lower input bias current (20nA versus 45nA). The LM258AP provides identical electrical performance with extended temperature coverage (-25°C to 85°C) and improved input bias current (15nA). Both parts carry ROHS3 compliance and active product status, ensuring long-term availability and supply chain stability.

Tier 2 - Compatible General-Purpose Alternatives:

The AS358P-E1 from Diodes Incorporated and LM358 variants from Texas Instruments provide functional equivalence with minor parameter deviations. The AS358P-E1 extends the maximum supply voltage to 36V and operating temperature to -40°C to 85°C, offering enhanced environmental performance. The LM358AN/NOPB and LM358N/NOPB variants maintain compatibility but operate within a narrower temperature range (0°C to 70°C), suitable for commercial-grade applications. All Tier 2 alternatives deliver 40mA output current and maintain the 3V minimum supply voltage requirement.

Tier 3 - Performance-Enhanced Alternatives:

The LT1208CN8#PBF from Linear Technology and AD826ANZ from Analog Devices Inc. exceed the KA258 electrical specifications significantly. The LT1208CN8#PBF delivers 400V/µs slew rate and 45MHz gain-bandwidth product, suitable for high-speed applications. The AD826ANZ provides voltage feedback topology with 350V/µs slew rate and 50MHz bandwidth, requiring minimum 5V supply voltage. These alternatives are appropriate for designs demanding enhanced frequency response and signal fidelity beyond general-purpose requirements.

Compliance and Certification:

All recommended substitutes carry REACH Unaffected status and EAR99 ECCN classification, matching the KA258 regulatory profile. Active product status ensures continued manufacturing support and documented technical resources. Moisture sensitivity levels vary; parts designated MSL 1 (Unlimited) provide maximum handling flexibility during assembly and storage.

Frequently Asked Questions (FAQ)

Q: Can the LM258P directly replace the KA258 in existing PCB designs?

A: Yes. The LM258P maintains identical 8-DIP (0.300", 7.62mm) through-hole packaging and pinout compatibility. Electrical parameters are within acceptable substitution ranges: supply voltage 3V to 32V, output current 40mA (exceeds 30mA requirement), and operating temperature -25°C to 85°C. No PCB modifications are required.

Q: What is the primary difference between LM258P and LM258AP?

A: Both devices are general-purpose dual operational amplifiers in 8-DIP packaging with identical supply voltage ranges (3V to 32V). The LM258AP features lower input bias current (15nA versus 20nA) and maintains the full -25°C to 85°C operating temperature range. The LM258P operates within 0°C to 70°C. Selection depends on temperature environment requirements.

Q: Why is the AS358P-E1 listed as a substitute despite different manufacturer?

A: The AS358P-E1 from Diodes Incorporated meets all primary substitution criteria: general-purpose amplifier type, dual-circuit configuration, 8-DIP packaging, and through-hole mounting. Electrical parameters align with KA258 specifications: 3V to 36V supply range, 40mA output current, and -40°C to 85°C operating temperature. Active product status and ROHS3 compliance ensure design continuity.

Q: Are the LT1208CN8#PBF and AD826ANZ suitable for direct KA258 replacement?

A: These parts are functionally compatible but represent performance enhancements rather than direct substitutes. The LT1208CN8#PBF requires minimum 5V supply (versus 3V for KA258) and operates 0°C to 70°C. The AD826ANZ employs voltage feedback topology, requires 5V minimum supply, and operates -40°C to 85°C. Both deliver significantly higher slew rates and bandwidth. Use these alternatives only when enhanced performance specifications are required.

Q: What packaging considerations apply to KA258 substitutes?

A: All listed substitutes maintain 8-DIP (0.300", 7.62mm) through-hole packaging with identical pinout. Mounting type is through-hole for all alternatives. Moisture sensitivity levels vary: most active substitutes carry MSL 1 (Unlimited) or Not Applicable designations, providing standard handling compatibility. Verify specific moisture sensitivity requirements for your assembly process.

Q: Does operating temperature range affect substitution suitability?

A: The KA258 operates -25°C to 85°C. Substitutes with identical or extended temperature ranges (LM258P, LM258AP, AS358P-E1, AD826ANZ) provide direct compatibility. Substitutes with narrower ranges (LM358 variants at 0°C to 70°C) are suitable for commercial-grade applications but not for extended temperature environments. Verify application temperature requirements before selection.

Q: What is the significance of "Active" versus "Obsolete" product status?

A: Obsolete status (KA258) indicates discontinued manufacturing and limited availability. Active status (all listed substitutes) ensures ongoing production, documented technical support, and supply chain reliability. Active products receive manufacturing process improvements and extended availability windows, reducing design risk and supporting long-term production schedules.

Q: Can multiple substitute parts be used interchangeably within the same design?

A: Yes, within Tier 1 and Tier 2 groupings. LM258P, LM258AP, and AS358P-E1 share compatible electrical and mechanical specifications, allowing interchangeable use in general-purpose amplifier applications. Tier 3 alternatives (LT1208CN8#PBF, AD826ANZ) require circuit validation due to enhanced performance characteristics and different supply voltage minimums. Consult device datasheets for specific application requirements.

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