Транзистор BC179VI
BC179VI - Транзистор кремниевый биполярный структуры PNP
- Тип исполнения: с выводами для монтажа в плату через отверстия (PTH)
- Корпус: TO-18
Основные характеристики:
- Максимальная рассеиваемая мощность коллектора, Pc: 0.3 Вт
- Максимальное напряжение коллектор-база, Vcb: 25 В
- Максимальное напряжение коллектор-эмиттер, Vce: 20 В
- Максимальное напряжение эмиттер-база, Veb: 5 В
- Максимальный постоянный ток коллектора, Ic: 0.05 А
- Граничная частота коэффициента передачи, Ft: 100 МГц
- Коэффициент передачи тока, не менее, Hfe: 75
- Емкость коллекторного перехода, Cc: 7 пФ
- Максимальная рабочая температура перехода, Tj: 175 гр.Ц
Транзистор BC179VI можно заменить на:
| НАЗВАНИЕ |
ТИП |
СТР. |
Pc, Вт |
Vcb, В |
Vce, В |
Veb, В |
Ic, А |
Ft, МГц |
Hfe |
Cc, пФ |
Tj, гр.Ц |
КОРПУС |
| 2N3251 |
PTH |
PNP |
0.36 |
50 |
40 |
5 |
0.2 |
300 |
100 |
6 |
200 |
TO-18 |
| 2N3251A |
PTH |
PNP |
0.36 |
60 |
60 |
5 |
0.2 |
300 |
100 |
6 |
200 |
TO-18 |
| 2N3798 |
PTH |
PNP |
0.36 |
60 |
60 |
5 |
0.05 |
100 |
100 |
4 |
200 |
TO-18 |
| 2N3798A |
PTH |
PNP |
0.36 |
60 |
60 |
5 |
0.05 |
100 |
100 |
4 |
200 |
TO-18 |
| 2N3799 |
PTH |
PNP |
0.36 |
90 |
90 |
5 |
0.05 |
100 |
225 |
4 |
200 |
TO-18 |
| 2N3799A |
PTH |
PNP |
0.36 |
90 |
90 |
5 |
0.05 |
100 |
225 |
4 |
200 |
TO-18 |
| 2N3799X |
PTH |
PNP |
0.36 |
70 |
50 |
5 |
0.05 |
500 |
250 |
4 |
200 |
TO-18 |
| 2N4035 |
PTH |
PNP |
0.36 |
40 |
40 |
5 |
0.2 |
450 |
150 |
4 |
175 |
TO-18 |
| 2N5244 |
PTH |
PNP |
0.36 |
40 |
40 |
5 |
0.1 |
450 |
150 |
4 |
175 |
TO-18 |
| 2SA1004 |
PTH |
PNP |
0.31 |
40 |
40 |
5 |
0.1 |
200 |
100 |
1.8 |
175 |
TO-92 |
| 2SA1016 |
PTH |
PNP |
0.4 |
120 |
120 |
5 |
0.05 |
110 |
160 |
2.2 |
175 |
TO-92 |
| 2SA1016F |
PTH |
PNP |
0.4 |
120 |
120 |
5 |
0.05 |
110 |
160 |
2.2 |
175 |
TO-92 |
| 2SA1016G |
PTH |
PNP |
0.4 |
120 |
120 |
5 |
0.05 |
110 |
280 |
2.2 |
175 |
TO-92 |
| 2SA1016K |
PTH |
PNP |
0.4 |
150 |
150 |
5 |
0.05 |
110 |
160 |
2.2 |
175 |
TO-92 |
| 2SA1016KF |
PTH |
PNP |
0.4 |
150 |
150 |
5 |
0.05 |
110 |
180 |
2.2 |
175 |
TO-92 |
| 2SA1017 |
PTH |
PNP |
0.5 |
120 |
120 |
5 |
0.05 |
110 |
100 |
2.2 |
175 |
TO-92 |
| 2SA1019 |
PTH |
PNP |
0.9 |
150 |
120 |
5 |
0.05 |
110 |
100 |
2.2 |
175 |
TO-92 |
| 2SA1033 |
PTH |
PNP |
0.31 |
30 |
30 |
5 |
0.1 |
280 |
100 |
3.1 |
175 |
TO-92 |
| 2SA1145 |
PTH |
PNP |
0.8 |
150 |
150 |
5 |
0.05 |
200 |
80 |
2.5 |
175 |
TO-92 |
| 2SA1145O |
PTH |
PNP |
0.8 |
150 |
150 |
5 |
0.05 |
200 |
80 |
2.5 |
175 |
TO-92 |
| 2SA1145Y |
PTH |
PNP |
0.8 |
150 |
150 |
5 |
0.05 |
200 |
120 |
2.5 |
175 |
TO-92 |
| 2SA1339 |
PTH |
PNP |
0.3 |
60 |
50 |
5 |
0.5 |
200 |
100 |
5.6 |
175 |
SOT-33 |
| 2SA1339R |
PTH |
PNP |
0.3 |
60 |
50 |
5 |
0.5 |
200 |
100 |
5.6 |
175 |
SOT-33 |
| 2SA1339S |
PTH |
PNP |
0.3 |
60 |
50 |
5 |
0.5 |
200 |
140 |
5.6 |
175 |
SOT-33 |
| 2SA1339T |
PTH |
PNP |
0.3 |
60 |
50 |
5 |
0.5 |
200 |
200 |
5.6 |
175 |
SOT-33 |
| 2SA1339Y |
PTH |
PNP |
0.3 |
60 |
50 |
5 |
0.5 |
200 |
280 |
5.6 |
175 |
SOT-33 |
| 2SA1344 |
SMD |
PNP |
0.4 |
50 |
50 |
10 |
0.1 |
200 |
120 |
5.3 |
175 |
TO-236 |
| 2SA1391 |
PTH |
PNP |
0.4 |
60 |
50 |
6 |
0.2 |
200 |
100 |
3.7 |
175 |
TO-92 |
| 2SA1391R |
PTH |
PNP |
0.4 |
60 |
50 |
6 |
0.2 |
200 |
100 |
3.7 |
175 |
TO-92 |
| 2SA1391S |
PTH |
PNP |
0.4 |
60 |
50 |
6 |
0.2 |
200 |
140 |
3.7 |
175 |
TO-92 |
| 2SA1391T |
PTH |
PNP |
0.4 |
60 |
50 |
6 |
0.2 |
200 |
200 |
3.7 |
175 |
TO-92 |
| 2SA1391U |
PTH |
PNP |
0.4 |
60 |
50 |
6 |
0.2 |
200 |
280 |
3.7 |
175 |
TO-92 |
| 2SA1392 |
PTH |
PNP |
0.4 |
60 |
50 |
6 |
0.2 |
200 |
100 |
3.7 |
175 |
TO-92 |
| 2SA1392R |
PTH |
PNP |
0.4 |
60 |
50 |
6 |
0.2 |
200 |
100 |
3.7 |
175 |
TO-92 |
| 2SA1392S |
PTH |
PNP |
0.4 |
60 |
50 |
6 |
0.2 |
200 |
140 |
3.7 |
175 |
TO-92 |
| 2SA1392T |
PTH |
PNP |
0.4 |
60 |
50 |
6 |
0.2 |
200 |
200 |
3.7 |
175 |
TO-92 |
| 2SA1392U |
PTH |
PNP |
0.4 |
60 |
50 |
6 |
0.2 |
200 |
280 |
3.7 |
175 |
TO-92 |
| 2SA1502 |
SMD |
PNP |
0.3 |
50 |
50 |
6 |
0.1 |
200 |
200 |
5.3 |
175 |
TO-236 |
| 2SA1630 |
PTH |
PNP |
0.5 |
50 |
50 |
6 |
0.1 |
200 |
120 |
2.5 |
175 |
TO-92 |
| 2SA603 |
PTH |
PNP |
0.3 |
60 |
40 |
8 |
0.2 |
150 |
80 |
7 |
175 |
TO-18 |
| 2SA844 |
PTH |
PNP |
0.3 |
55 |
55 |
5 |
0.1 |
100 |
160 |
3.6 |
175 |
SOT-33 |
| 2SA844C |
PTH |
PNP |
0.3 |
55 |
55 |
5 |
0.1 |
100 |
320 |
3.6 |
175 |
SOT-33 |
| 2SA893AC |
PTH |
PNP |
0.3 |
120 |
120 |
5 |
0.05 |
120 |
320 |
3.6 |
175 |
TO-92 |
| 2SA941 |
PTH |
PNP |
0.3 |
120 |
120 |
5 |
0.05 |
150 |
200 |
5 |
175 |
TO-92 |
| 2SA942 |
PTH |
PNP |
0.3 |
90 |
90 |
5 |
0.05 |
150 |
200 |
5 |
175 |
TO-92 |
| 2SB807 |
SMD |
PNP |
1 |
150 |
120 |
5 |
0.1 |
100 |
90 |
4 |
180 |
SOT-89 |
| BC177A |
PTH |
PNP |
0.3 |
45 |
45 |
5 |
0.1 |
130 |
120 |
7 |
175 |
TO-18 |
| BC177AP |
PTH |
PNP |
0.3 |
45 |
45 |
5 |
0.1 |
130 |
120 |
7 |
175 |
TO-92 |
| BC177B |
PTH |
PNP |
0.3 |
45 |
45 |
5 |
0.1 |
130 |
180 |
7 |
175 |
TO-18 |
| BC177BP |
PTH |
PNP |
0.3 |
45 |
45 |
5 |
0.1 |
130 |
180 |
7 |
175 |
TO-92 |
| BC177VI |
PTH |
PNP |
0.3 |
45 |
45 |
5 |
0.1 |
130 |
75 |
7 |
175 |
TO-18 |
| BC178A |
PTH |
PNP |
0.3 |
30 |
25 |
5 |
0.2 |
100 |
120 |
7 |
175 |
TO-18 |
| BC178AP |
PTH |
PNP |
0.3 |
30 |
25 |
5 |
0.2 |
100 |
125 |
7 |
175 |
TO-92 |
| BC178B |
PTH |
PNP |
0.3 |
30 |
25 |
5 |
0.2 |
100 |
180 |
7 |
175 |
TO-18 |
| BC178BP |
PTH |
PNP |
0.3 |
30 |
25 |
5 |
0.2 |
100 |
240 |
7 |
175 |
TO-92 |
| BC178C |
PTH |
PNP |
0.3 |
30 |
25 |
5 |
0.2 |
100 |
350 |
7 |
175 |
TO-18 |
| BC178P |
PTH |
PNP |
0.3 |
30 |
25 |
5 |
0.2 |
100 |
75 |
7 |
175 |
TO-92 |
| BC178VI |
PTH |
PNP |
0.3 |
30 |
25 |
5 |
0.2 |
100 |
75 |
7 |
175 |
TO-18 |
| BC179A |
PTH |
PNP |
0.3 |
25 |
20 |
5 |
0.05 |
100 |
120 |
7 |
175 |
TO-18 |
| BC179AP |
PTH |
PNP |
0.3 |
25 |
20 |
5 |
0.05 |
100 |
120 |
7 |
175 |
TO-92 |
| BC179B |
PTH |
PNP |
0.3 |
25 |
20 |
5 |
0.05 |
100 |
180 |
7 |
175 |
TO-18 |
| BC179BP |
PTH |
PNP |
0.3 |
25 |
20 |
5 |
0.05 |
100 |
180 |
7 |
175 |
TO-92 |
| BC261 |
PTH |
PNP |
0.3 |
45 |
45 |
5 |
0.1 |
100 |
125 |
6 |
175 |
TO-18 |
| BC261A |
PTH |
PNP |
0.3 |
45 |
45 |
5 |
0.1 |
100 |
125 |
6 |
175 |
TO-18 |
| BC261B |
PTH |
PNP |
0.3 |
45 |
45 |
5 |
0.1 |
100 |
240 |
6 |
175 |
TO-18 |
| BC262 |
PTH |
PNP |
0.3 |
25 |
25 |
5 |
0.1 |
100 |
125 |
6 |
175 |
TO-18 |
| BC262A |
PTH |
PNP |
0.3 |
25 |
25 |
5 |
0.1 |
100 |
125 |
6 |
175 |
TO-18 |
| BC262B |
PTH |
PNP |
0.3 |
25 |
25 |
5 |
0.1 |
100 |
240 |
6 |
175 |
TO-18 |
| BC263 |
PTH |
PNP |
0.3 |
25 |
25 |
5 |
0.1 |
100 |
125 |
6 |
175 |
TO-18 |
| BC263A |
PTH |
PNP |
0.3 |
25 |
25 |
5 |
0.1 |
100 |
125 |
6 |
175 |
TO-18 |
| BC263B |
PTH |
PNP |
0.3 |
25 |
25 |
5 |
0.1 |
100 |
240 |
6 |
175 |
TO-18 |
| BC266 |
PTH |
PNP |
0.3 |
64 |
64 |
5 |
0.1 |
200 |
125 |
6 |
175 |
TO-18 |
| BC266A |
PTH |
PNP |
0.3 |
64 |
64 |
5 |
0.1 |
200 |
125 |
6 |
175 |
TO-18 |
| BC266B |
PTH |
PNP |
0.3 |
64 |
64 |
5 |
0.1 |
200 |
240 |
6 |
175 |
TO-18 |
| BC281B |
PTH |
PNP |
0.36 |
60 |
45 |
6 |
0.2 |
100 |
100 |
6 |
200 |
TO-18 |
| BC281C |
PTH |
PNP |
0.36 |
60 |
45 |
6 |
0.2 |
100 |
150 |
6 |
200 |
TO-18 |
| BC477A |
PTH |
PNP |
0.36 |
90 |
80 |
6 |
0.15 |
100 |
125 |
6 |
200 |
TO-18 |
| BC478 |
PTH |
PNP |
0.36 |
40 |
40 |
6 |
0.15 |
100 |
110 |
6 |
200 |
TO-18 |
| BC478A |
PTH |
PNP |
0.36 |
40 |
40 |
6 |
0.15 |
100 |
125 |
6 |
200 |
TO-18 |
| BC478B |
PTH |
PNP |
0.36 |
40 |
40 |
6 |
0.15 |
100 |
240 |
6 |
200 |
TO-18 |
| BC479 |
PTH |
PNP |
0.36 |
40 |
40 |
6 |
0.15 |
100 |
200 |
6 |
200 |
TO-18 |
| BC479B |
PTH |
PNP |
0.36 |
40 |
40 |
6 |
0.15 |
100 |
240 |
6 |
200 |
TO-18 |
| BCAP77A |
PTH |
PNP |
0.3 |
50 |
45 |
5 |
0.1 |
200 |
125 |
7 |
175 |
TO-18 |
| BCAP77B |
PTH |
PNP |
0.3 |
50 |
45 |
5 |
0.1 |
200 |
240 |
7 |
175 |
TO-18 |
| BCAP78A |
PTH |
PNP |
0.3 |
30 |
25 |
5 |
0.1 |
200 |
125 |
7 |
175 |
TO-18 |
| BCAP78B |
PTH |
PNP |
0.3 |
30 |
25 |
5 |
0.1 |
200 |
240 |
7 |
175 |
TO-18 |
| BCAP79 |
PTH |
PNP |
0.3 |
25 |
20 |
5 |
0.1 |
150 |
110 |
7 |
175 |
TO-18 |
| BCAP79A |
PTH |
PNP |
0.3 |
25 |
20 |
5 |
0.1 |
200 |
125 |
7 |
175 |
TO-18 |
| BCAP79B |
PTH |
PNP |
0.3 |
25 |
20 |
5 |
0.1 |
200 |
240 |
7 |
175 |
TO-18 |
| BCY67 |
PTH |
PNP |
1 |
45 |
45 |
5 |
0.05 |
180 |
180 |
7 |
200 |
TO-18 |
| BCY71 |
PTH |
PNP |
0.35 |
60 |
45 |
5 |
0.2 |
300 |
100 |
6 |
200 |
TO-18 |
| BCY71A |
PTH |
PNP |
0.35 |
45 |
45 |
5 |
0.2 |
330 |
100 |
6 |
200 |
TO-18 |
| BCY71AP |
PTH |
PNP |
0.35 |
45 |
45 |
5 |
0.2 |
330 |
150 |
6 |
200 |
TO-18 |
| BCY72P |
PTH |
PNP |
0.35 |
25 |
25 |
5 |
0.2 |
200 |
100 |
6 |
200 |
TO-18 |
| BCY77 |
PTH |
PNP |
1 |
60 |
60 |
5 |
0.1 |
180 |
120 |
7 |
200 |
TO-18 |
| BCY77-7 |
PTH |
PNP |
1 |
60 |
60 |
5 |
0.1 |
180 |
120 |
7 |
200 |
TO-18 |
| BCY77-8 |
PTH |
PNP |
1 |
60 |
60 |
5 |
0.1 |
180 |
180 |
7 |
200 |
TO-18 |
| BCY77-9 |
PTH |
PNP |
1 |
60 |
60 |
5 |
0.1 |
180 |
250 |
7 |
200 |
TO-18 |
| BCY77A |
PTH |
PNP |
1 |
60 |
60 |
5 |
0.1 |
180 |
120 |
7 |
200 |
TO-18 |
| BCY77B |
PTH |
PNP |
1 |
60 |
60 |
5 |
0.1 |
180 |
180 |
7 |
200 |
TO-18 |
| BCY77C |
PTH |
PNP |
1 |
60 |
60 |
5 |
0.1 |
180 |
250 |
7 |
200 |
TO-18 |
| BCY78 |
PTH |
PNP |
1 |
32 |
32 |
5 |
0.2 |
180 |
120 |
7 |
200 |
TO-18 |
| BCY78-7 |
PTH |
PNP |
1 |
32 |
32 |
5 |
0.2 |
180 |
120 |
7 |
200 |
TO-18 |
| BCY78-8 |
PTH |
PNP |
1 |
32 |
32 |
5 |
0.2 |
180 |
180 |
7 |
200 |
TO-18 |
| BCY78-9 |
PTH |
PNP |
1 |
32 |
32 |
5 |
0.2 |
180 |
250 |
7 |
200 |
TO-18 |
| BCY78-IX |
PTH |
PNP |
0.34 |
32 |
32 |
5 |
0.1 |
100 |
160 |
7 |
200 |
TO-206AA |
| BCY78-VII |
PTH |
PNP |
0.34 |
32 |
32 |
5 |
0.1 |
100 |
120 |
7 |
200 |
TO-206AA |
| BCY78-VIII |
PTH |
PNP |
0.34 |
32 |
32 |
5 |
0.1 |
100 |
120 |
7 |
200 |
TO-206AA |
| BCY78-X |
PTH |
PNP |
0.34 |
32 |
32 |
5 |
0.1 |
100 |
240 |
7 |
200 |
TO-206AA |
| BCY78A |
PTH |
PNP |
0.35 |
32 |
32 |
5 |
0.2 |
180 |
120 |
7 |
200 |
TO-18 |
| BCY78B |
PTH |
PNP |
0.35 |
32 |
32 |
5 |
0.2 |
180 |
180 |
7 |
200 |
TO-18 |
| BCY78C |
PTH |
PNP |
0.35 |
32 |
32 |
5 |
0.2 |
180 |
250 |
7 |
200 |
TO-18 |
| BCY79 |
PTH |
PNP |
1 |
45 |
45 |
5 |
0.2 |
180 |
120 |
7 |
200 |
TO-18 |
| BCY79-7 |
PTH |
PNP |
1 |
45 |
45 |
5 |
0.2 |
180 |
120 |
7 |
200 |
TO-18 |
| BCY79-8 |
PTH |
PNP |
1 |
45 |
45 |
5 |
0.2 |
180 |
180 |
7 |
200 |
TO-18 |
| BCY79-9 |
PTH |
PNP |
1 |
45 |
45 |
5 |
0.2 |
180 |
250 |
7 |
200 |
TO-18 |
| BCY79-IX |
PTH |
PNP |
0.34 |
45 |
45 |
5 |
0.1 |
100 |
160 |
7 |
200 |
TO-206AA |
| BCY79-VII |
PTH |
PNP |
0.34 |
45 |
45 |
5 |
0.1 |
100 |
120 |
7 |
200 |
TO-206AA |
| BCY79-VIII |
PTH |
PNP |
0.34 |
45 |
45 |
5 |
0.1 |
100 |
120 |
7 |
200 |
TO-206AA |
| BCY79-X |
PTH |
PNP |
0.34 |
45 |
45 |
5 |
0.1 |
100 |
240 |
7 |
200 |
TO-206AA |
| BCY79A |
PTH |
PNP |
0.35 |
45 |
45 |
5 |
0.2 |
180 |
120 |
7 |
200 |
TO-18 |
| BCY79AP |
PTH |
PNP |
0.35 |
45 |
45 |
5 |
0.2 |
180 |
120 |
7 |
200 |
X16 |
| BCY79B |
PTH |
PNP |
0.35 |
45 |
45 |
5 |
0.2 |
180 |
250 |
7 |
200 |
TO-18 |
| BCY79BP |
PTH |
PNP |
0.35 |
45 |
45 |
5 |
0.2 |
180 |
180 |
7 |
200 |
X16 |
| BCY79C |
PTH |
PNP |
0.35 |
45 |
45 |
5 |
0.2 |
180 |
250 |
7 |
200 |
TO-18 |
| BCY79CP |
PTH |
PNP |
0.35 |
45 |
45 |
5 |
0.2 |
180 |
250 |
7 |
200 |
X16 |
| BFS40 |
SMD |
PNP |
0.35 |
45 |
35 |
5 |
0.5 |
150 |
100 |
5 |
175 |
SOT-23 |
| BFX48 |
PTH |
PNP |
0.36 |
30 |
30 |
5 |
0.1 |
400 |
90 |
3.5 |
200 |
TO-18 |
| BSS70R |
SMD |
PNP |
0.3 |
40 |
40 |
5 |
0.1 |
250 |
100 |
4.5 |
175 |
TO-236 |
| BSW19A |
PTH |
PNP |
0.3 |
35 |
30 |
5 |
0.1 |
150 |
100 |
7 |
175 |
TO-18 |
| BSW22 |
PTH |
PNP |
0.3 |
25 |
25 |
5 |
0.2 |
150 |
180 |
6 |
175 |
TO-18 |
| CMPT3906 |
SMD |
PNP |
0.35 |
40 |
40 |
5 |
0.05 |
250 |
100 |
4.5 |
175 |
SOT-23 |
| FT3906 |
PTH |
PNP |
0.36 |
40 |
40 |
5 |
0.2 |
250 |
100 |
4.5 |
175 |
TO-18 |
| FXT3906 |
PTH |
PNP |
0.31 |
40 |
40 |
5 |
0.2 |
250 |
100 |
5 |
200 |
TO-92 |
| GES3251 |
SMD |
PNP |
0.36 |
50 |
40 |
5 |
0.2 |
300 |
100 |
6 |
180 |
TO-236 |
| GES3251A |
SMD |
PNP |
0.36 |
60 |
60 |
5 |
0.2 |
300 |
100 |
6 |
200 |
TO-236 |
| MA0411 |
PTH |
PNP |
0.3 |
60 |
45 |
6 |
0.1 |
100 |
100 |
6 |
200 |
TO-18 |
| MA0412 |
PTH |
PNP |
0.3 |
60 |
45 |
6 |
0.1 |
100 |
200 |
6 |
200 |
TO-18 |
| MA0462 |
PTH |
PNP |
0.36 |
50 |
40 |
6 |
0.3 |
175 |
100 |
7 |
200 |
TO-18 |
| MM1712 |
PTH |
PNP |
0.8 |
60 |
40 |
5 |
0.5 |
200 |
100 |
6 |
200 |
TO-5 |
| MM3906 |
PTH |
PNP |
0.36 |
40 |
40 |
5 |
0.2 |
250 |
100 |
5 |
200 |
TO-18 |
| MM4008 |
PTH |
PNP |
0.6 |
60 |
60 |
5 |
0.5 |
160 |
75 |
6 |
200 |
TO-5 |
| MM4048 |
PTH |
PNP |
0.38 |
45 |
45 |
5 |
0.05 |
100 |
150 |
4 |
200 |
TO-18 |
| MMBT3251 |
SMD |
PNP |
0.36 |
50 |
40 |
5 |
0.2 |
300 |
100 |
6 |
180 |
TO-236 |
| MMBT3251A |
SMD |
PNP |
0.36 |
60 |
60 |
5 |
0.2 |
300 |
100 |
6 |
200 |
TO-236 |
| MP3251 |
SMD |
PNP |
0.36 |
50 |
40 |
5 |
0.2 |
300 |
100 |
6 |
180 |
TO-236 |
| MP3251A |
SMD |
PNP |
0.36 |
60 |
60 |
5 |
0.2 |
300 |
100 |
6 |
200 |
TO-236 |
| NS3906 |
PTH |
PNP |
0.31 |
40 |
40 |
5 |
0.2 |
250 |
100 |
4.5 |
200 |
TO-18 |