It can be quite difficult to find crosses for certain parts, especially when several specifications may different enough to consider redesigning. The reality is this: either a redesign is in order or you may need to compromise on certain values and see if the replacement will work for your particular application with some change in behavior.
2SC3264 is an NPN transistor with the following specifications I considered:
| Specification Name | Value |
|---|---|
| Transistor Type | NPN |
| Current Collector (Ic) (Max) | 17A |
| Mounting Type | Through Hole |
| Frequency Transition | 60MHz |
| Vce Breakdown Max | 230V |
| Power Max | 200W |
The closest transistor considering all the specifications is the following: MJW18020G; DigiKey part number MJW18020GOS-ND. Having a higher transition frequency closer to the original is probably the best to go for (depends if this specification matters to you though). The rest of the specifications that I listed are met or exceeded. Even though the part has a different package, it still has in-line pins, so it may be acceptable to some layouts. This is what I mean by having to compromise, some specifications cannot be matched all the time when it comes to obsolete parts.
The second one, 2SA1295 is a PNP counterpart with the following main specifications:
| Specification Name | Value |
|---|---|
| Transistor Type | PNP |
| Current Collector (Ic)(Max) | 17A |
| Mounting Type | Through Hole |
| Frequency Transition | 35MHz |
| Vce Breakdown Max | 230V |
| Power Max | 200W |
| The only one I could find is 2SA1943OTU; DigiKey part number 2SA1943OTU-ND. While most of the specs match or exceed the original, the major concern is the max power. The one I found can only handle 150W, this may be crucial to some applications. This is one of the reasons you really have to review the specs that matter to you, in this case, the most likely option would be to redesign if maximum power was critical. |
Please review the datasheets to ensure the alternative will work for your application.