2SA608NF-NPA-AT Equivalent & Substitute Parts

Part Overview

The 2SA608NF-NPA-AT is a PNP bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This device features a 50 V collector-emitter breakdown voltage rating and supports collector currents up to 150 mA with a maximum power dissipation of 500 mW in a Through Hole TO-92 package.

The 2SA608NF-NPA-AT is classified as an obsolete product. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability for production, and support long-term system maintenance where original parts are no longer readily available from primary sources.

Substiute Parts

2SA608NF-NPA-AT

onsemiIn Stock: 40572SA608NF-NPA-AT Datasheet

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KSA1015YTA

onsemiIn Stock: 59898KSA1015YTA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SA608NF-NPA-AT is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Transistor polarity must be PNP
• Voltage - Collector Emitter Breakdown rating must be equal to or greater than 50 V
• Current - Collector (Ic) maximum rating must be equal to or greater than 150 mA
• Vce Saturation characteristics must match or be superior (lower saturation voltage)
• Current - Collector Cutoff (ICBO) must be equal to or lower than 100 nA
• Operating temperature range must support 150°C maximum junction temperature

Mechanical Compatibility Criteria:

• Mounting type must be Through Hole
• Package must be TO-92-3 or equivalent TO-226-3 configuration with compatible lead geometry

The KSA1015YTA meets these substitution criteria while offering active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The 2SA608NF-NPA-AT is classified as obsolete, while the KSA1015YTA is an active product with current manufacturing support. Selection of the KSA1015YTA ensures ongoing component availability and supply chain continuity.

Compliance and Certification: The KSA1015YTA carries RoHS3 compliance certification, whereas the 2SA608NF-NPA-AT does not specify RoHS compliance. Both devices are REACH Unaffected and carry EAR99 ECCN classification. The KSA1015YTA is the preferred selection for applications requiring RoHS compliance documentation.

Electrical Performance: The KSA1015YTA provides equivalent performance across all critical voltage and current parameters. The lower power rating (400 mW versus 500 mW) and transition frequency (80 MHz versus 200 MHz) of the KSA1015YTA do not affect substitution validity for applications operating within the specified maximum ratings of the substitute device.

Packaging and Mechanical Compatibility: Both devices utilize identical Through Hole TO-92-3 package configurations with compatible lead geometry, ensuring direct mechanical substitution without circuit board redesign.

Frequently Asked Questions (FAQ)

Q: Can the KSA1015YTA directly replace the 2SA608NF-NPA-AT in existing designs?

A: Yes. The KSA1015YTA is electrically and mechanically compatible with the 2SA608NF-NPA-AT across all critical parameters including voltage rating, current capacity, saturation characteristics, and package configuration. Direct substitution is supported without circuit modification.

Q: What is the significance of the lower power rating on the KSA1015YTA?

A: The KSA1015YTA is rated at 400 mW maximum power dissipation compared to 500 mW for the 2SA608NF-NPA-AT. This difference does not affect substitution validity provided the application design ensures power dissipation remains within the 400 mW limit of the substitute device. Applications already operating below 400 mW require no design adjustment.

Q: Does the lower transition frequency of the KSA1015YTA affect high-frequency performance?

A: The KSA1015YTA is rated at 80 MHz transition frequency compared to 200 MHz for the 2SA608NF-NPA-AT. For applications operating at frequencies below 80 MHz, no performance degradation occurs. Applications requiring operation above 80 MHz must evaluate whether the lower frequency rating is acceptable for the specific circuit function.

Q: Are there differences in DC current gain between these devices?

A: The KSA1015YTA specifies a minimum DC current gain (hFE) of 120 at 2 mA and 6 V, compared to 160 at 1 mA and 6 V for the 2SA608NF-NPA-AT. Both devices provide sufficient gain for typical switching and amplification applications. Circuit designs dependent on specific hFE values should be evaluated against the KSA1015YTA specification.

Q: What is the packaging difference between TO-92-3 and TO-226-3?

A: TO-92-3 and TO-226-3 refer to the same physical package configuration. TO-226 is the formal IEC designation, while TO-92 is the legacy industry designation. Both terms describe the three-lead Through Hole package with identical lead spacing and geometry used by both devices.

Q: Is RoHS compliance important for this substitution?

A: The KSA1015YTA carries RoHS3 compliance certification while the 2SA608NF-NPA-AT does not specify RoHS status. For applications or markets requiring RoHS compliance documentation, the KSA1015YTA is the appropriate selection. For applications without RoHS requirements, both devices are functionally equivalent.

Q: Can the KSA1015YTA be used in applications originally designed for the 2SA608NF-NPA-AT?

A: Yes, provided the application design operates within the electrical limits of the KSA1015YTA. The critical design parameters—voltage rating, current capacity, saturation voltage, and package configuration—are equivalent or superior. Applications must confirm operation within the 400 mW power dissipation and 80 MHz frequency limits of the substitute device.