What is this transistor?

Status
Not open for further replies.
S

steve_rb

Full Member level 3
Joined
Feb 17, 2004
Messages
184
Helped
1
Reputation
2
Reaction score
2
Trophy points
1,298
Visit site
Activity points
1,538
I have this transistor in Motor speed control board of Beckman J21c centrifuge but couldn'
t find its datasheet. Also no trace of it. Anyone can recommend a replacement?

 

Where did you search? (or did you?)

A quick google for "RCA 40250" shows many hits.

I.E.
https://electrontubestore.com/index.php?main_page=product_info&products_id=2469
or
https://www.radiomuseum.org/tubes/tube_40250~2.html

Code: 
40250 Transistor Datasheet. Parameters and Characteristics.

Type Designator: 40250

Material of transistor: Si

Polarity: NPN

Maximum collector power dissipation (Pc), W: 29

Maximum collector-base voltage |Ucb|, V: 50

Maximum collector-emitter voltage |Uce|, V: 50

Maximum emitter-base voltage |Ueb|, V: 5

Maximum collector current |Ic max|, A: 4

Maximum junction temperature (Tj), °C: 200

Transition frequency (ft), MHz:

Collector capacitance (Cc), pF:

Forward current transfer ratio (hFE), min: 25

Noise Figure, dB: -

Package of 40250 transistor: TO66

And if you enter into Google "rca 40250 equivalent" then you get results that WILL lead you to equivalents.
I.E. https://alltransistors.com/crsearch...50&ueb=5&ic=4&tj=200&ft=&cc=&hfe=25&caps=TO66 (This was the first hit)

Check out:
Code: 
1.	2N4232 	 	 Si 	 	 NPN 	 	 35 	 	 70 	 	 60 	 	 5 	 	 5 	 	 200 	 	 25 	 	 TO66
2.	2N4233 	 	 Si 	 	 NPN 	 	 35 	 	 90 	 	 80 	 	 5 	 	 5 	 	 200 	 	 25 	 	 TO66
3.	2N4233A 	 	 Si 	 	 NPN 	 	 75 	 	 80 	 	 80 	 	 5 	 	 5 	 	 200 	 	 25 	 	 TO66
4.	2N4301 	 	 Si 	 	 NPN 	 	 50 	 	 100 	 	 80 	 	 8 	 	 10 	 	 200 	 	 30 	 	 TO66
5.	2N5427 	 	 Si 	 	 NPN 	 	 40 	 	 80 	 	 80 	 	 6 	 	 7 	 	 200 	 	 30 	 	 TO66
6.	2N5428 	 	 Si 	 	 NPN 	 	 40 	 	 80 	 	 80 	 	 6 	 	 7 	 	 200 	 	 60 	 	 TO66
7.	2N5429 	 	 Si 	 	 NPN 	 	 40 	 	 100 	 	 100 	 	 6 	 	 7 	 	 200 	 	 30 	 	 TO66
8.	2N5430 	 	 Si 	 	 NPN 	 	 40 	 	 100 	 	 100 	 	 6 	 	 7 	 	 200 	 	 60 	 	 TO66
9.	2N6233 	 	 Si 	 	 NPN 	 	 50 	 	 250 	 	 225 	 	 6 	 	 5 	 	 200 	 	 25 	 	 TO66
10.	2N6234 	 	 Si 	 	 NPN 	 	 50 	 	 300 	 	 275 	 	 6 	 	 5 	 	 200 	 	 25 	 	 TO66
11.	2N6235 	 	 Si 	 	 NPN 	 	 50 	 	 350 	 	 325 	 	 6 	 	 5 	 	 200 	 	 25 	 	 TO66
12.	2N6235R 	 	 Si 	 	 NPN 	 	 50 	 	 300 	 	 275 	 	 6 	 	 5 	 	 200 	 	 25 	 	 TO66
13.	2N6261 	 	 Si 	 	 NPN 	 	 50 	 	 90 	 	 80 	 	 7 	 	 4 	 	 200 	 	 25 	 	 TO66
14.	2N6294 	 	 Si 	 	 NPN 	 	 50 	 	 60 	 	 60 	 	 5 	 	 8 	 	 200 	 	 750 	 	 TO66
15.	2N6295 	 	 Si 	 	 NPN 	 	 50 	 	 80 	 	 80 	 	 5 	 	 8 	 	 200 	 	 750 	 	 TO66
16.	2N6300 	 	 Si 	 	 NPN 	 	 75 	 	 60 	 	 60 	 	 5 	 	 8 	 	 200 	 	 750 	 	 TO66
17.	2N6301 	 	 Si 	 	 NPN 	 	 75 	 	 80 	 	 80 	 	 5 	 	 8 	 	 200 	 	 750 	 	 TO66
18.	2N6534 	 	 Si 	 	 NPN 	 	 36 	 	 80 	 	 80 	 	 5 	 	 15 	 	 200 	 	 1000 	 	 TO66
19.	2N6535 	 	 Si 	 	 NPN 	 	 36 	 	 100 	 	 100 	 	 5 	 	 15 	 	 200 	 	 500 	 	 TO66
20.	2N6536 	 	 Si 	 	 NPN 	 	 36 	 	 100 	 	 100 	 	 5 	 	 15 	 	 200 	 	 1000 	 	 TO66
21.	2N6537 	 	 Si 	 	 NPN 	 	 36 	 	 120 	 	 120 	 	 5 	 	 15 	 	 200 	 	 1000 	 	 TO66
22.	2S043 	 	 Si 	 	 NPN 	 	 35 	 	 100 	 	 80 	 	 8 	 	 5 	 	 200 	 	 30 	 	 TO66
23.	2S044 	 	 Si 	 	 NPN 	 	 35 	 	 100 	 	 80 	 	 8 	 	 5 	 	 200 	 	 60 	 	 TO66
24.	2S045 	 	 Si 	 	 NPN 	 	 35 	 	 150 	 	 120 	 	 8 	 	 5 	 	 200 	 	 30 	 	 TO66
25.	2S046 	 	 Si 	 	 NPN 	 	 35 	 	 150 	 	 120 	 	 8 	 	 5 	 	 200 	 	 60 	 	 TO66
26.	40250 	 	 Si 	 	 NPN 	 	 29 	 	 50 	 	 50 	 	 5 	 	 4 	 	 200 	 	 25 	 	 TO66
27.	BDY71 	 	 Si 	 	 NPN 	 	 29 	 	 90 	 	 55 	 	 0 	 	 4 	 	 200 	 	 80 	 	 TO66
28.	BUR10 	 	 Si 	 	 NPN 	 	 30 	 	 100 	 	 80 	 	 8 	 	 5 	 	 200 	 	 40 	 	 TO66
29.	BUT30 	 	 Si 	 	 NPN 	 	 250 	 	 200 	 	 125 	 	 0 	 	 100 	 	 200 	 	 25 	 	 TO66
30.	BUT32 	 	 Si 	 	 NPN 	 	 250 	 	 400 	 	 300 	 	 0 	 	 80 	 	 200 	 	 25 	 	 TO66
31.	BUX77 	 	 Si 	 	 NPN 	 	 40 	 	 100 	 	 80 	 	 6 	 	 5 	 	 200 	 	 50 	 	 TO66
32.	BUX77A 	 	 Si 	 	 NPN 	 	 40 	 	 100 	 	 80 	 	 6 	 	 8 	 	 200 	 	 30 	 	 TO66
33.	NTE274 	 	 Si 	 	 NPN 	 	 50 	 	 80 	 	 80 	 	 5 	 	 4 	 	  	 	 3000 	 	 TO66
34.	RCA1C05 	 	 Si 	 	 NPN 	 	 40 	 	 140 	 	 120 	 	 5 	 	 4 	 	 200 	 	 40 	 	 TO66
35.	SK3026 	 	 Si 	 	 NPN 	 	 29 	 	 90 	 	 60 	 	 7 	 	 4 	 	 200 	 	 70 	 	 TO66
36.	SK3538 	 	 Si 	 	 NPN 	 	 40 	 	 160 	 	 140 	 	 7 	 	 4 	 	 200 	 	 30 	 	 TO66
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…