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KSD560RTSTU Equivalent & Substitute Parts
Part Overview
The KSD560RTSTU is an NPN Darlington bipolar junction transistor manufactured by onsemi, designed for high-current switching applications. This device features a 100 V collector-emitter breakdown voltage rating and supports collector currents up to 5 A in a Through Hole TO-220-3 package configuration. The KSD560RTSTU is classified as Last Time Buy, indicating that the original manufacturer has discontinued production. Identifying equivalent substitute parts is necessary to ensure continued availability for new designs and ongoing production requirements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Transistor Type | NPN - Darlington | — |
| Current - Collector (Ic) (Max) | 5 | A |
| Voltage - Collector Emitter Breakdown (Max) | 100 | V |
| Power - Max | 1.5 | W |
| Mounting Type | Through Hole | — |
| Package / Case | TO-220-3 | — |
| Operating Temperature (Max) | 150 | °C |
| RoHS Status | ROHS3 Compliant | — |
Substitute Part Grouping Explanation
Substitute parts for the KSD560RTSTU are identified based on strict electrical and mechanical parameter matching within the NPN Darlington transistor category. The substitution criteria are:
Critical Matching Parameters:
- Transistor Type: NPN - Darlington configuration
- Maximum Collector Current (Ic): 5 A minimum
- Collector-Emitter Breakdown Voltage: 100 V minimum
- Package Type: TO-220-3 Through Hole mounting
- RoHS Compliance: ROHS3 Compliant
The TIP122G meets all critical substitution parameters and is classified as an Active product, providing long-term availability compared to the Last Time Buy status of the KSD560RTSTU.
Parameter Comparison
| Parameter | KSD560RTSTU | TIP122G | Unit |
|---|---|---|---|
| Manufacturer | onsemi | onsemi | — |
| Transistor Type | NPN - Darlington | NPN - Darlington | — |
| Current - Collector (Ic) (Max) | 5 | 5 | A |
| Voltage - Collector Emitter Breakdown (Max) | 100 | 100 | V |
| Power - Max | 1.5 | 2 | W |
| Mounting Type | Through Hole | Through Hole | — |
| Package / Case | TO-220-3 | TO-220-3 | — |
| Operating Temperature (Max) | 150 | 150 | °C |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | — |
| Product Status | Last Time Buy | Active | — |
Engineering Selection Recommendations
The TIP122G is a direct substitute for the KSD560RTSTU based on electrical and mechanical compatibility. Both devices are manufactured by onsemi and share identical critical specifications: 5 A maximum collector current, 100 V breakdown voltage, TO-220-3 package configuration, and ROHS3 compliance.
The TIP122G offers the following advantages for component selection:
- Product Status: Active product with ongoing manufacturer support, eliminating Last Time Buy constraints
- Power Rating: 2 W maximum power dissipation exceeds the KSD560RTSTU specification of 1.5 W, providing additional thermal margin
- Inventory Availability: 35,100 units in stock compared to 3,455 units for the KSD560RTSTU
- Compliance: Both devices maintain ROHS3 compliance and REACH Unaffected status
The TIP122G is suitable for direct replacement in existing KSD560RTSTU circuit designs without modification to PCB layout or thermal management systems, provided the TO-220-3 package footprint is maintained.
Frequently Asked Questions (FAQ)
Q: Can the TIP122G replace the KSD560RTSTU in existing designs?
A: Yes. Both devices share identical maximum collector current (5 A), collector-emitter breakdown voltage (100 V), and TO-220-3 package configuration. The TIP122G provides equal or superior performance across all critical electrical parameters.
Q: What are the differences in saturation voltage between these devices?
A: The KSD560RTSTU specifies 1.5 V saturation voltage at 3 mA base current and 3 A collector current. The TIP122G specifies 4 V saturation voltage at 20 mA base current and 5 A collector current. These measurements are taken at different operating points and do not prevent substitution.
Q: Are there thermal management differences?
A: The TIP122G has a maximum power rating of 2 W compared to 1.5 W for the KSD560RTSTU. This higher rating provides additional thermal headroom in applications operating near maximum power dissipation limits.
Q: Do both devices require identical PCB footprints?
A: Yes. Both the KSD560RTSTU and TIP122G use the TO-220-3 Through Hole package, requiring identical PCB land patterns and mounting hole spacing.
Q: What is the significance of the Last Time Buy status?
A: Last Time Buy indicates the KSD560RTSTU is no longer in production. The TIP122G, classified as Active, ensures continued component availability for future production runs and design revisions.
Q: Are both devices RoHS compliant?
A: Yes. Both the KSD560RTSTU and TIP122G are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.
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