KSC1393OTA Equivalent & Substitute Parts

Part Overview

The KSC1393OTA is an RF transistor NPN manufactured by onsemi, rated for 30V collector-emitter breakdown voltage with a transition frequency of 700MHz and maximum power dissipation of 250mW. This device is packaged in a through-hole TO-92-3 configuration and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements.

Substiute Parts

KSC1393OTA

onsemiIn Stock: 882KSC1393OTA Datasheet

Current PartRFQ

BFP420FH6327XTSA1

Infineon TechnologiesIn Stock: 4302BFP420FH6327XTSA1 Datasheet

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BFP620FH7764XTSA1

Infineon TechnologiesIn Stock: 5428BFP620FH7764XTSA1 Datasheet

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BFP720FH6327XTSA1

Infineon TechnologiesIn Stock: 7560BFP720FH6327XTSA1 Datasheet

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BFS17NQTA

Diodes IncorporatedIn Stock: 24386BFS17NQTA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSC1393OTA RF transistor is determined by the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Transistor Type: NPN configuration required
• Operating Temperature: Maximum 150°C junction temperature
• Moisture Sensitivity Level: MSL 1 (Unlimited)
• Regulatory Compliance: REACH Unaffected, ECCN EAR99

Secondary Compatibility Factors:

• Voltage Rating: Substitute parts must support applications within the 30V maximum rating
• Frequency Performance: Transition frequency capability must meet or exceed application requirements
• Power Dissipation: Maximum power rating must accommodate circuit power levels
• Current Handling: Collector current capacity must satisfy circuit demands
• DC Current Gain: Minimum hFE specifications must support circuit biasing requirements

The substitute parts listed below are active products from established manufacturers (Infineon Technologies and Diodes Incorporated) that maintain NPN RF transistor functionality. Substitution feasibility depends on specific application requirements for voltage, frequency, power, and mounting configuration.

Parameter Comparison

Engineering Selection Recommendations

Product Status Considerations:

The KSC1393OTA is classified as obsolete. All substitute parts listed (BFP420FH6327XTSA1, BFP720FH6327XTSA1, BFP620FH7764XTSA1, and BFS17NQTA) are active products from established manufacturers with current production and inventory availability.

Regulatory Compliance:

All substitute parts maintain REACH Unaffected status and EAR99 ECCN classification, consistent with the original KSC1393OTA. Infineon Technologies and Diodes Incorporated substitute parts carry RoHS3 compliance certification.

Electrical Parameter Alignment:

Substitute selection must account for voltage rating differences. The KSC1393OTA operates at 30V maximum, while substitute parts operate at lower voltage ratings (2.8V to 11V). Applications requiring the full 30V rating cannot use these substitutes without circuit redesign. The BFS17NQTA provides the highest voltage rating among substitutes at 11V.

Frequency and Power Characteristics:

Substitute parts offer significantly higher transition frequencies (3.2GHz to 65GHz) compared to the KSC1393OTA (700MHz). Power dissipation ratings vary: BFP720FH6327XTSA1 at 100mW is lower than the original, while BFS17NQTA at 310mW exceeds the original specification.

Mounting Configuration:

The KSC1393OTA uses through-hole TO-92-3 packaging. All substitute parts use surface-mount configurations (4-TSFP or SOT-23-3), requiring PCB layout and assembly process modifications.

Frequently Asked Questions (FAQ)

Q: Can the BFP420FH6327XTSA1 directly replace the KSC1393OTA in existing through-hole designs?

A: No. The BFP420FH6327XTSA1 uses surface-mount 4-TSFP packaging, while the KSC1393OTA uses through-hole TO-92-3 packaging. PCB redesign and assembly process changes are required.

Q: Which substitute part is most suitable for applications requiring high voltage operation?

A: The BFS17NQTA provides the highest voltage rating at 11V maximum collector-emitter breakdown voltage among the listed substitutes. However, this remains significantly lower than the original KSC1393OTA specification of 30V. Applications requiring 30V operation cannot use any of these substitutes without circuit redesign.

Q: Are all substitute parts RoHS compliant?

A: Yes. The BFP420FH6327XTSA1, BFP720FH6327XTSA1, BFP620FH7764XTSA1, and BFS17NQTA all carry RoHS3 compliance certification.

Q: What is the primary difference between the Infineon and Diodes Incorporated substitute options?

A: The Infineon parts (BFP420FH6327XTSA1, BFP720FH6327XTSA1, BFP620FH7764XTSA1) use 4-TSFP surface-mount packaging and offer higher transition frequencies (25GHz to 65GHz). The Diodes Incorporated BFS17NQTA uses SOT-23-3 surface-mount packaging with a transition frequency of 3.2GHz, closer to the original KSC1393OTA frequency range.

Q: Do all substitute parts maintain the same operating temperature range as the KSC1393OTA?

A: All substitute parts support a maximum junction temperature of 150°C, consistent with the original. The BFS17NQTA additionally specifies a minimum operating temperature of -55°C, providing an extended temperature range.

Q: What inventory availability exists for these substitute parts?

A: Current inventory levels are: BFP420FH6327XTSA1 (4,290 pcs), BFP720FH6327XTSA1 (7,451 pcs), BFP620FH7764XTSA1 (5,367 pcs), and BFS17NQTA (24,300 pcs).

Q: Are moisture sensitivity considerations the same across all parts?

A: Yes. The KSC1393OTA and all substitute parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions.