KSC3074OTU Equivalent & Substitute Parts

Part Overview

The KSC3074OTU is an NPN bipolar junction transistor manufactured by onsemi, rated for 50V collector-emitter breakdown voltage and 5A maximum collector current. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and production continuity. Substitute parts must maintain electrical and mechanical compatibility within the specified parameter ranges while accommodating the through-hole I-PAK mounting configuration.

Substiute Parts

KSC3074OTU

onsemiIn Stock: 1283KSC3074OTU Datasheet

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2SC6017-E

onsemiIn Stock: 20962SC6017-E Datasheet

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2SD1801S-E

onsemiIn Stock: 151962SD1801S-E Datasheet

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2SD1801T-E

onsemiIn Stock: 10162SD1801T-E Datasheet

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2SD1802S-E

onsemiIn Stock: 149552SD1802S-E Datasheet

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2SD1802T-E

Fairchild SemiconductorIn Stock: 53372SD1802T-E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the KSC3074OTU are selected based on the following criteria:

Primary Compatibility Parameters:

• Transistor Type: NPN (required match)
• Voltage - Collector Emitter Breakdown (Max): 50V (required match)
• Mounting Type: Through Hole (required match)
• Package / Case: TO-251-3 Short Leads, IPak, TO-251AA (required match)

Secondary Compatibility Parameters:

• Current - Collector (Ic) (Max): Equal to or greater than 5A
• Power - Max: Equal to or greater than 1W
• Operating Temperature (TJ): Equal to or greater than 150°C

Substitute parts meeting these criteria are grouped by current rating capability and product status. Parts with higher current ratings (10A) provide enhanced performance margin. Parts with active product status offer superior long-term availability compared to obsolete alternatives.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 2SD1802T-E

The 2SD1802T-E is the preferred substitute for the KSC3074OTU. This part maintains exact electrical parameter compatibility with 5A maximum collector current and 1W power rating. The 2SD1802T-E is manufactured by Fairchild Semiconductor and carries active product status, ensuring long-term availability and supply chain stability. The part meets all mechanical compatibility requirements with identical TO-251-3 Short Leads, IPak, TO-251AA packaging. Transition frequency of 150MHz exceeds the original 120MHz specification, providing enhanced performance margin.

Secondary Recommendation: 2SC6017-E

The 2SC6017-E provides an alternative with enhanced current handling capability at 10A maximum collector current. This part is manufactured by onsemi and maintains the 50V voltage rating and through-hole mounting configuration. The 2SC6017-E offers superior frequency performance at 200MHz and is ROHS3 compliant. This substitute is suitable for applications requiring higher current capacity within the same voltage and package constraints.

Alternative Consideration: 2SD1802S-E

The 2SD1802S-E is available as an alternative with 3A maximum collector current. This part is ROHS3 compliant and maintains the 50V voltage rating and identical package configuration. The 2SD1802S-E is suitable for applications where the 5A rating of the original part exceeds design requirements.

Not Recommended: 2SD1801T-E and 2SD1801S-E

The 2SD1801 series parts (2SD1801T-E and 2SD1801S-E) are rated for 2A maximum collector current, which falls below the 5A specification of the KSC3074OTU. These parts are not suitable for direct substitution in applications requiring the full 5A current capacity.

Frequently Asked Questions (FAQ)

Q: Can the 2SD1802T-E directly replace the KSC3074OTU in existing designs?

A: Yes. The 2SD1802T-E maintains identical electrical specifications for voltage rating (50V), current rating (5A), power dissipation (1W), and operating temperature (150°C). The part uses the same TO-251-3 Short Leads, IPak, TO-251AA package configuration, enabling direct pin-compatible substitution without circuit modification.

Q: What is the advantage of selecting the 2SC6017-E over the 2SD1802T-E?

A: The 2SC6017-E provides 10A maximum collector current compared to the 5A rating of both the KSC3074OTU and 2SD1802T-E. This higher current capacity offers design margin for applications approaching the 5A limit. The 2SC6017-E also features 200MHz transition frequency versus 120MHz for the original part. Selection depends on whether the application requires this enhanced current handling capability.

Q: Are there compliance differences between substitute options?

A: The 2SD1802T-E does not specify RoHS status in the provided data. The 2SC6017-E, 2SD1802S-E, and 2SD1801S-E are ROHS3 compliant. All parts carry REACH Unaffected status and EAR99 ECCN classification. Applications with specific RoHS compliance requirements should select 2SC6017-E, 2SD1802S-E, or 2SD1801S-E accordingly.

Q: Why are 2SD1801T-E and 2SD1801S-E not recommended as substitutes?

A: The 2SD1801 series is rated for 2A maximum collector current, which is insufficient for applications requiring the 5A capability of the KSC3074OTU. Using an undersized part creates risk of thermal stress and component failure under normal operating conditions.

Q: What is the moisture sensitivity level for substitute parts?

A: All substitute parts listed carry Moisture Sensitivity Level (MSL) 1, indicating unlimited moisture sensitivity. This matches the original KSC3074OTU specification and requires no special handling modifications.

Q: Can the 2SD1802S-E be used in place of the KSC3074OTU?

A: The 2SD1802S-E is suitable only for applications where the maximum collector current requirement does not exceed 3A. The part maintains the 50V voltage rating, 1W power dissipation, and identical package configuration. For designs requiring the full 5A current capacity of the original part, the 2SD1802S-E is not appropriate.