NTE Electronics
NTE265 NPN Silicon Darlington Power Transistor, TO-202, Factory Sealed
- 2 photos
Never used and never opened. Still in the factory tube, tray, reel or bag it shipped in, with the original date code intact.
New old stock, sealed on the grading scaleSend the quantity you need. You get a quote back with shipping before anything is charged.
Video
Filmed on the bench. Sound is stripped from product clips.
- 0:10
Specifications
| Specification | Value |
|---|---|
| Identification | |
| Part number | NTE265 |
| Manufacturer | NTE Electronics |
| Condition | New old stock, sealed |
| Date code | Not recorded |
| Package | TO-202, in the original sealed NTE pack |
| Country of origin | Not recorded |
| Family | NTE265 |
| Stock number | NDJQ3WPZ |
| Overview | |
| Manufacturer part number | NTE265 |
| Manufacturer | NTE Electronics |
| Replaces | ECG265, SK3860 |
| Electrical | |
| Device type | NPN silicon Darlington |
| Collector base voltage | 50 V |
| Collector emitter voltage | 50 V |
| Emitter base voltage | 13 V |
| Collector current | 0.5 A |
| Dissipation | 6.25 W |
| Minimum DC gain | hFE 10,000 |
| Construction | |
| Package | TO-202 |
| Condition | |
| Condition | Factory sealed. Never opened, so never tested |
About this part
A Darlington is two transistors in one package, the first one's emitter feeding the second one's base, and the reason to do that is gain. The minimum DC gain here is ten thousand, which means a hundred microamps into the base will control an amp at the collector. A single transistor of this size would give you perhaps fifty. That is what lets a logic output or a sensor drive a relay, a solenoid or a small motor with nothing in between.
The costs are worth knowing before you design one in. Two junctions in series means the saturation voltage never gets below about a volt, so it runs hotter than a single transistor doing the same work, and it switches off more slowly because the second base has nowhere to dump its charge. Neither matters in a relay driver and both matter in a switching supply.
Printed on the pack: 50 V collector to base and collector to emitter, 13 V emitter to base, half an amp of collector current, 6.25 W dissipation, TO-202 package. It replaces ECG265 and SK3860, which are the numbers an older service manual is likely to name.
Still factory sealed, so it has never been out of the pack and has never been tested. The packaging shows the yellowing and shelf wear of its age.
Questions about this part
What is a Darlington and when do I want one?
Two transistors in one package, the first feeding the base of the second, which multiplies the gain. At a minimum of ten thousand, a hundred microamps into the base controls an amp at the collector. That is what lets a logic output or a sensor drive a relay, a solenoid or a small motor directly.
What is the catch?
Two junctions in series, so the saturation voltage never drops much below a volt and the device runs hotter than a single transistor doing the same job. It also turns off more slowly, because the second base has nowhere to dump its stored charge. Fine in a relay driver, a problem in a switching supply.
Is NTE the original manufacturer?
NTE is a replacement parts house: it catalogues devices by its own numbering so a technician can cross reference from whatever the equipment specified. That is why the pack lists what it replaces. The silicon inside was made by somebody, and NTE does not say who.
Has it been tested?
No. The pack has never been opened, which is how it is being sold, so nobody has had the device out to test it. If you would rather have it tested than sealed, say so before ordering and we will discuss it, but opening it is not reversible.