KSD560OTU Equivalent & Substitute Parts

Part Overview

The KSD560OTU is an NPN Darlington bipolar junction transistor manufactured by onsemi, rated for 100 V collector-emitter breakdown voltage and 5 A maximum collector current in a TO-220-3 through-hole package. This device is classified as obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications where the original part is no longer readily procurable from primary sources.

Substiute Parts

KSD560OTU

onsemiIn Stock: 1003KSD560OTU Datasheet

Current PartRFQ

TIP122G

onsemiIn Stock: 35189TIP122G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the KSD560OTU is determined by equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Transistor type classification: NPN - Darlington configuration
• Maximum collector current rating: 5 A minimum
• Collector-emitter breakdown voltage: 100 V minimum
• Package / case form factor: TO-220-3 through-hole mounting

Mechanical Compatibility:

• Through-hole mounting technology
• TO-220-3 package pinout and thermal interface

The TIP122G substitute part satisfies all mandatory electrical and mechanical equivalence criteria. Both devices share identical maximum current and voltage ratings, operate within compatible temperature ranges, and utilize the same through-hole TO-220-3 package configuration, enabling direct functional substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The KSD560OTU is classified as obsolete, whereas the TIP122G substitute is active product status. The TIP122G is the appropriate selection for new designs and ongoing production requirements where component continuity is essential.

Compliance and Regulatory Status: Both the KSD560OTU and TIP122G maintain identical REACH compliance status (REACH Unaffected) and ECCN classification (EAR99), ensuring equivalent regulatory standing. The TIP122G carries RoHS3 compliance certification, providing additional environmental compliance assurance for applications subject to RoHS requirements.

Electrical Performance: The TIP122G provides equivalent electrical performance across all critical parameters: 5 A maximum collector current, 100 V breakdown voltage, and TO-220-3 package configuration. The TIP122G offers extended operating temperature range (−65°C to 150°C) compared to the KSD560OTU (150°C maximum), and increased maximum power dissipation (2 W versus 1.5 W), providing enhanced thermal margin in power-limited applications.

Availability: The TIP122G demonstrates significantly higher inventory availability (35,100 pieces) relative to the KSD560OTU (899 pieces), supporting reliable supply chain continuity for production and service applications.

Frequently Asked Questions (FAQ)

Q: Can the TIP122G directly replace the KSD560OTU in existing circuit designs?

A: Yes. Both devices are NPN Darlington transistors with identical maximum collector current (5 A) and collector-emitter breakdown voltage (100 V) ratings. Both utilize the TO-220-3 through-hole package with identical pinout configuration. Direct substitution is supported for applications operating within the specified electrical parameters.

Q: What are the differences in saturation voltage between these devices?

A: The KSD560OTU specifies Vce saturation of 1.5 V at 3 mA base current and 3 A collector current. The TIP122G specifies Vce saturation of 4 V at 20 mA base current and 5 A collector current. These measurements are taken at different operating points and do not preclude functional equivalence. Circuit designs should verify saturation voltage performance at the specific operating conditions of the application.

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

A: Yes. The KSD560OTU specifies minimum DC current gain (hFE) of 3000 at 3 A collector current and 2 V Vce. The TIP122G specifies minimum DC current gain of 1000 at 3 A collector current and 3 V Vce. Both devices provide sufficient current gain for Darlington configuration applications. Circuit designs dependent on specific hFE values should be verified against the actual operating conditions.

Q: What is the significance of the extended temperature range in the TIP122G?

A: The TIP122G operates across −65°C to 150°C, whereas the KSD560OTU operates to 150°C maximum. The extended lower temperature limit provides operational capability in cold environment applications. For applications operating only at or above room temperature, this difference is not significant.

Q: Does the increased power rating of the TIP122G affect substitution suitability?

A: The TIP122G power rating of 2 W exceeds the KSD560OTU rating of 1.5 W. This provides additional thermal margin and does not create substitution incompatibility. Applications designed for the 1.5 W KSD560OTU operate safely within the TIP122G 2 W capability.

Q: Are there packaging differences between these devices?

A: Both devices utilize the TO-220-3 through-hole package. The KSD560OTU is supplied in standard packaging, while the TIP122G is supplied in tube packaging. The physical package form factor and pinout are identical, supporting direct mechanical substitution on printed circuit boards.

Q: What compliance certifications apply to the TIP122G?

A: The TIP122G carries RoHS3 compliance certification in addition to REACH Unaffected status and EAR99 ECCN classification. These certifications match or exceed the regulatory standing of the KSD560OTU, supporting use in applications with environmental compliance requirements.