Bulbs are described by a letter indicating shape and a number that is an approximation
of diameter expressed in eighths of an inch. For example, B-4 is "B" shape, 4 eighths or one
half inch in diameter.
Bulb Styles
B
G
GTL
RP
S
T
TL
Bayonet Bases
BIDC
BDC
BSC
PFDC
BMN
Flange Bases
FSMD
FSCMD
FSCMN
Screw Bases
SMD
SMN
SC
SI
Wedge Bases
WSMN
W
SL
Miscellaneous Bases
MTP
BP
GMD
SPTHD
Lamp Base Legend
BDC
Bayonet, dual-contact
FSMD
Flanged, submidget
SMD
Screw, midget
BIDC
Bayonet, indexed dual-contact
GMD
Midget grooved
SMN
Screw, miniature
BMN
Bayonet, miniature
MTP
Miniature two-pin
SPTHD
Screw, special thread
BP
Bipin
PFDC
Prefocused dual contact
W
Wedge
BSC
Bayonet, single-contact
SL
Slide (various sizes)
WSMN
Wedge, subminiature
FSCMN
Flanged, single-contact, miniature
SC
Screw, candelabra
WT
Wire terminal
FSCMD
Flanged, midget single-contact
SI
Screw, intermediate
Type
Bulb
Base
Volts (V)
Current (A)
Lifetime (x1000 hrs)
PR2
B-3.5
FSCMN
2.38
0.500
15
PR3
B-3.5
FSCMN
3.57
0.500
15
PR4
B-3.5
FSCMN
2.33
0.270
10
PR6
B-3.5
FSCMN
2.47
0.300
30
PR7
B-3.5
FSCMN
3.70
0.300
30
PR12
B-3.5
FSCMN
5.95
0.500
15
PR13
B-3.5
FSCMN
4.75
0.500
15
10
G-3.5
MTP
2.50
0.500
3K
12
G-3.5
MTP
6.30
0.150
5K
13
G-3.5
SMN
3.70
0.300
15
14
G-3.5
SMN
2.47
0.300
15
19
G-3.5
MTP
14.40
0.100
1K
27
G-4.5
SMN
4.90
0.300
30
37
T-1.75
WSMN
14.00
0.090
1.5K
40
T-3.25
SMN
6.30
0.150
3K
43
T-3.25
BMN
2.50
0.500
3K
44
T-3.25
BMN
6.30
0.250
3K
45
5-3.25
BMN
3.20
0.350
3K
46
T-3.25
SMN
6.30
0.250
3K
47
T-3.25
BMN
6.30
0.150
3K
48
T-3.25
SMN
2.00
0.060
1K
49
T-3.25
BMN
2.00
0.060
1K
50
G-3.5
SMN
7.50
0.220
1K
51
G-3.5
BMN
7.50
0.220
1K
52
G-3.5
SMN
14.40
0.100
1K
53
G-3.5
BMN
14.40
0.120
1K
55
G-4.5
BMN
7.00
0.410
500
57
G-4.5
BMN
14.00
0.240
500
63
G-6
BSC
7.00
0.630
1K
73
T-1.75
WSMN
14.00
0.080
15K
74
T-1.75
WSMN
14.00
0.100
500
82
G-6
BDC
6.50
1.020
500
85
T-1.75
WSMN
28.00
0.040
7K
86
T-1.75
WSMN
6.30
0.200
20K
88
S-8
BDC
6.80
1.910
300
93
S-8
BSC
12.80
1.040
700
112
TL-3
SMN
1.20
0.220
5
130
G-3.5
BMN
6.30
0.150
5K
131
G-3.5
SMN
1.30
0.100
50
158
T-3.25
W
14.00
0.240
500
159
T-3.25
W
6.30
0.150
5K
161
T-3.25
W
14.00
0.190
4K
168
T-3.25
W
14.00
0.350
1.5K
219
G-3.5
BMN
6.30
0.250
5K
222
TL-3
SMN
2.25
0.250
0.5
239
T-3.25
BMN
6.30
0.360
5K
240
T-3.25
BMN
6.30
0.360
5K
259
T-3.25
W
6.30
0.250
5K
268
T-1.75
FSCMD
2.50
0.350
10K
305
S-8
BSC
28.00
0.510
300
307
S-8
BSC
28.00
0.670
300
308
S-8
BDC
28.00
0.670
300
313
T-3.25
BMN
28.00
0.170
500
323
T-1.25
SPTHD
3.00
0.190
350
327
T-1.75
FSCMD
28.00
0.040
4K
327AS15
T-1.75
FSCMD
28.00
0.040
4K
328
T-1.75
FSCMD
6.00
0.200
1K
330
T-1.75
FSCMD
14.00
0.080
1.5K
331
T-1.75
FSCMD
1.35
0.060
3K
334
T-1.75
GMD
28.00
0.040
4K
335
T-1.75
SMD
28.00
0.040
4K
336
T-1.75
GMD
14.00
0.080
1.5K
337
T-1.75
GMD
6.00
0.200
1K
338
T-1.75
FSCMD
2.70
0.060
6K
342
T-1.75
SMD
6.00
0.040
10K
344
T-1.75
FSCMD
10.00
0.014
50K
345
T-1.75
FSCMD
6.00
0.040
10K
346
T-1.75
GMD
18.00
0.040
10K
349
T-1.75
FSCMD
6.30
0.200
5K
370
T-1.75
FSCMD
18.00
0.040
10K
373
T-1.75
SMD
14.00
0.080
1.5K
375
T-1.75
FSCMD
3.00
0.015
10K
376
T-1.75
FSCMD
28.00
0.060
25K
380
T-1.75
FSCMD
6.30
0.040
20K
381
T-1.75
FSCMD
6.30
0.200
20K
382
T-1.75
FSCMD
14.00
0.080
15K
385
T-1.75
FSCMD
28.00
0.040
10K
386
T-1.75
GMD
14.00
0.080
15K
387
T-1.75
FSCMD
28.00
0.040
7K
388
T-1.75
GMD
28.00
0.040
7K
397
T-1.75
GMD
10.00
0.040
5K
398
T-1.75
GMD
6.30
0.200
5K
399
T-1.75
SMD
28.00
0.040
7K
502
G-4.5
SMN
5.10
0.150
100
555
T-3.25
W
6.30
0.250
3K
656
T-3.25
W
28.00
0.060
2.5K
680AS15
T-1
WT
5.00
0.060
60K
682AS15
T-1
FSMD
5.00
0.060
60K
683AS15
T-1
WT
5.00
0.060
25K
685AS15
T-1
FSMD
5.00
0.060
25K
715AS15
T-1
WT
5.00
0.115
40K
715AS25
T-1
WT
5.00
0.115
40K
718AS25
T-1
FSMD
5.00
0.115
40K
755
T-3.25
BMN
6.30
0.150
20K
756
T-3.25
BMN
14.00
0.080
15K
757
T-3.25
BMN
28.00
0.080
7.5K
1034
S-8
BIDC
14.00
0.590
5K
1073
S-8
BSC
12.80
1.800
200
1130
S-8
BDC
6.40
2.630
200
1133
RP-11
BSC
6.20
3.910
200
1141
S-8
BSC
12.880
1.440
1K
1143
RP-11
BSC
12.50
1.980
400
1184
RP-11
BDC
5.50
6.250
100
1251
G-6
BSC
28.00
0.230
2K
1445
G-3.5
BMN
14.40
0.130
2K
1487
T-3.25
SMN
14.00
0.200
3K
1488
T-3.25
BMN
14.00
0.150
200
1490
T-3.25
BMN
3.20
0.160
3K
1493
S-8
BDC
6.50
2.750
100
1619
S-8
BSC
6.70
1.900
500
1630
S-8
PFDC
6.50
2.750
100
1691
S-8
BSC
28.00
0.610
1K
1705
T-1.75
WT
14.00
0.080
1.5K
1728
T-1.75
WT
1.35
0.060
3K
1730
T-1.75
WT
6.00
0.040
20K
1738
T-1.75
WT
2.70
0.060
6K
1762
T-1.75
WT
28.00
0.040
4K
1764
T-1.75
WT
28.00
0.040
4K
1767
T-1.75
SMD
2.50
0.200
500
1768
T-1.75
SMD
6.00
0200
1K
1775
T-1.75
SMD
6.30
0.075
1K
1813
T-3.25
BMN
14.40
0.100
1K
1815
T-3.25
BMN
14.00
0.200
3K
1816
T-3.25
BMN
13.00
0.330
1K
1818
T-3.25
BMN
24.00
0.170
250
1819
T-3.25
BMN
28.00
0.040
2.5K
1820
T-3.25
BMN
28.00
0.100
1K
1821
T-3.25
SMN
28.00
0.170
500
1822
T-3.25
BMN
36.00
0.100
1K
1828
T-3.25
BMN
37.50
0.050
3K
1835
T-3.25
BMN
55.00
0.050
5K
1847
T-3.25
BMN
6.30
0.150
5K
1850
T-3.25
BMN
5.00
0.090
1.5K
1864
T-3.25
BMN
28.00
0.170
1.5K
1869
T-1.75
WT
10.00
0.014
50K
1891
T-3.25
BMN
14.00
0.240
500
1892
T-3.25
BMN
14.40
0.120
1K
1893
T-3.25
BMN
14.00
0.330
7.5K
1895
G-4.5
BMN
14.00
0.270
2K
2102
T-1.75
WT
18.00
0.040
10K
2107
T-1.75
WT
10.00
0.040
5K
2158
T-1.75
WT
3.00
0.015
10K
2162
T-1.75
WT
14.00
0.100
10K
2169
T-1.75
WT
2.50
0.350
20K
2180
T-1.75
WT
6.30
0.040
20K
2181
T-1.75
WT
6.30
0.200
20K
2182
T-1.75
WT
14.00
0.080
40K
2187
T-1.75
WT
28.00
0.040
7K
2304
T-1.75
BP
3.00
0.300
1.5K
2307
T-1.75
BP
6.30
0.200
5K
2314
T-1.75
BP
28.00
0.050
1K
2316
T-1.75
BP
18.00
0.040
10K
2324
T-1.75
BP
28.00
0.040
4K
2335
T-1.75
BP
14.00
0.080
15K
2337
T-1.75
BP
6.30
0.200
20K
2342
T-1.75
BP
28.00
0.040
25K
3149
T-1.75
BP
5.00
0.060
5K
6803AS25
T-.75
WT
5.00
0.060
60K
6833AS15
T-.75
WT
5.00
0.060
25K
6838
T-1
WT
28.00
0.024
4K
6839
T-1
FSMD
28.00
0.024
4K
7001
T-1.75
BP
24.00
0.050
2K
7003
T-1.75
BP
24.00
0.050
2K
7153AS15
T-.75
WT
5.00
0.115
40K
7265
T-1
BP
5.00
0.060
5K
7327
T-1.75
BP
28.00
0.040
4K
7328
T-1.75
BP
6.00
0.200
1K
7330
T-1.75
BP
14.00
0.080
1.5K
7344
T-1.75
BP
10.00
0.014
50K
7349
T-1.75
BP
6.30
0.200
5K
7361
T-1.75
BP
5.00
0.060
25K
7362
T-1.75
BP
5.00
0.115
40K
7367
T-1.75
BP
10.00
0.040
5K
7370
T-1.75
BP
18.00
0.040
10K
7371
T-1.75
BP
12.00
0.040
10K
7373
T-1.75
BP
14.00
0.100
10K
7374
T--1.75
BP
28.00
0.040
10K
7375
T-1.75
BP
3.00
0.015
10K
7376
T-1.75
BP
28.00
0.065
10K
7377
T-1.75
BP
6.30
0.075
1K
7380
T-1.75
BP
6.30
0.040
30K
7381
T-1.75
BP
6.30
0.200
20K
7382
T-1.75
BP
14.00
0.080
15K
7387
T-1.75
BP
28.00
0.040
7K
7410
T-1.75
BP
14.00
0.080
15K
7839
T-1
BP
28.00
0.025
4K
7876
T-1.75
BP
28.00
0.060
25K
7931
T-1.75
BP
1.35
0.060
3K
7945
T-1.75
BP
6.00
0.040
20K
7968
T-1.75
BP
2.50
0.200
500
8099
T-1
BP
18.00
0.020
16K
8362
T-1.75
SMD
14.00
0.080
15K
8369
T-1.75
SMD
28.00
0.065
10K
Standard Line-Voltage Lamps
Type
V
W
Bulb
Base
10C7DC
115-125
10
C-7
BDC
3S6
120, 125
3
S-6
SC
6S6
30, 48, 115, 120, 125, 130, 135, 145, 155
6
S-6
SC
6S6/R
115-125
6
S-6 (red)
SC
6S6/W
115-125
6
S-6 (white)
SC
6T4.5
120, 130
6
T-4.5
SC
7C7
115-125
7
C-7
SC
7C7/W
115-125
7
C-7 (white)
SC
10C7
115-125
10
C-7
SC
10S6
120
10
S-6
SC
10S6/10
220, 230, 25
10
S-6
SC
6S6DC
30, 120, 125, 145
6
S-6
BDC
10S6/10DC
230, 250
10
S-6
BDC
40S11 N
115-125
40
S-11
SI
120MB
120
3
T-2.5
BMN
120MB/6
120
6
T-2.5
BMN
120PSB
120
3
T-2
SL
120PS
120
3
T-2
WT
120PS/6
120
6
T-2.5
WT
Indicator Lamps (each has a T-2 bulb and a slide base)
Type
V
A
Lifetime (x1000 hrs)
6PSB
6.00
0.140
20K
12PSB
12.00
0.170
12K
24PSB
24.00
0.073
10K
28PSB
28.00
0.040
5K
48PSB
48.00
0.050
10K
60PSB
60.00
0.050
7.5K
120PSB
120.00
0.025
7.5K
Neon Glow Lamps (operating circuit voltage 105-125)
Breakdown Voltage
Type
AC
DC
Bulb
Base
W
External Resistance
NE-2
65
90
T-2
WT
1/12
150K
NE-2A
65
90
T-2
WT
1/15
100K
NE-2D
65
90
T-2
FSCMD
1/12
100K
NE-2E
65
90
T-2
WT
1/12
100K
NE-2H
95
135
T-2
WT
1/4
30K
NE-2J
95
135
T-2
FSCMD
1/4
30K
NE-2V
65
90
T-2
WT
1/12
100K
NE-45
65
90
T-4 1/2
SC
1/4
None
NE-51
65
90
T-3 1/4
BMN
1/25
220K
NE-51H
95
135
T-3 1/4
BMN
1/7
47K
NE-84
95
135
T-2
SL
1/4
30K
NE-120PSB
95
95
T-2
SL
1/4
None
Information derived from the 78th edition of the ARRL Handbook
2001, Copyright, 2000.
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