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_"---_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ File No. 304
OO(]5LJD
Solid State
Division
Power Transistors
40542
40543
SILICON N·P·N, MOLDED SILICONE·PLASTIC 1I0MHAXIAL·BASE TRANSISTORS
RCA-40542 and -40543 are hometaxial**-base silicon
n-p-n power traDsis~ors employing a new plastic package
with formed leads which can be inserted into a TO·3
socket.
These types differ in voltage ratings and in the
current at which the parameters are controlled. The
40542 is intended as a complement to p-n-p type 40051
in complementry-symmetry output stages of audio-ampli-
fier circuits. The 40543 was designed specifically for
amplifier applications.
*Data for type 40051 appears in File No. 67.
·*"HOMETAXIAL" was coined by RCA from two words,
"homogeneous" and "axial," to provide a name for a
transistor structure in which the base region comprises
homogeneous resistivity silicon material in the axial direc-
tion {emitter...to-collector}. Hometaxial types provide
greater power-handling capability, lower saturation resist-
ance, and freedom from second breakdown.
FOR OUTPUT STAGES IN
AUDIO-AMPLIFIER CIRCUITS
40542 -- N-P-N Complement of 40051*
H·1532
40542 & 40543
For TO-3 Sockets
• Molded silicone-plastic package
• Low saturation voltage:
VCE(sat) = 1.0 V max. at IC = 2.5A (40542)
= 1.0 V max. at IC = 3.0 A (40543)
• Low thermal resistance:
eJ-C = 1.5 °C/W max.
,Absolute-Maximum Values:
MAXIMUM RATINGS
COLLECTOR-TO-EMITIER SUSTAINING VOLTAGE:
With external base-to-emitter resistance (RSE) = 100 n. . . . . ... VCER(sus)
EMITTER-TO-BASE VOLTAGE ••••••••••••••••••••••••••
COLLECTOR CURRENT •••••••••••••••••••••••••.••..
TRANSISTOR DISSIPATION: •••••••.•••••••••••••••••••
At case temperatures up to 250 C •••••••••••••••••••••••
At temperatures above 250 C •••••••••••• ~ •••••••••••••
PT
TEMPERATURE RANGE:
Storage & Operating (Junction)•••••••••••••••••••••••••
LEAD TEMPERATURE (During Soldering):
At distances:!!:' 1/16 in. fcom seating plane for 10 s max.
40542
50
6
40543
60
5
8
83 83
Derate linearly
to 0 Wat 1500 C.
-65 to 150
235
V
V
A
W
1()'67
428

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File No. 304 __________________________ 40542,40543
Characteristic
ELECTRICAL CHARACTERISTICS
Case Temperature (TCI = 250 C
TEST CONDITIONS
DC Voltage DC Current
Symbol
(V)
(A)
VCE VEB IC IB
LIMITS
Type
40542
Min. Max.
Type
40543
Min. Max.
Units
Coliector-CutoH Current
With external base..to..emitter
nresistance (RBE) = 100
ICER
40
50
Emi tter-Cutoff Curren t
lEBO
DC Forwarct-Current Transfer Ratio
4
hFE 4
Collector-to-Emitter Sustaining Voltage
With external base..to-emitter
resistance (RBE) = 100 n
VCER(sUS
Base-to-Emi tter Voltage
VBE
4
4
Collector-to-Emitter Saturation Voltage VCE(sat)
Gain-Bandwidth Product
Thermal Resistance·
(Junction-to-Case)
fT 4
Bl-C
50
2.5"
3.0"
0.2"
- 1.0
--
- 5.0
20 70
--
50 -
2.5"
3.0"
2.5" 0.25
3.0" 0.3
-
-
-
-
0.5 0.8
1.7
-
1.0
-
2.8
- 1.5
--
-
,nA
1.0
- 5,0 mA
--
20 70
60 -
V
-
-
-
1.7
V
--
- 1.0
V
0.8 2.8 MHz
- 1.5 °C/W
"Pulsed; pulse duration = 300 p.s, duty factor = 1.8%.
TERMINAL CONNECTIONS FOR TYPES
40542 & 40543
Lead No. 1- Base
Lead No.2 - Emitter
Mounting Flange - Collector
429

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40542,40543 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ File No. 304
TYPICAL DC BETA
FOR TYPE 40542
TYPICAL INPUT CHARACTERISTICS
FOR TYPE 40542
COLLECTOR· TO _EMITTER VOLTAGE (VeE) .4 V
CASE TEMPERAlURE (Te) • 2SOC
.70
"H!
'"
i so
~
!!:
V
.S ,;'
iii 30 /
~ ,./
10
I .lj ,.
0.01 0.1
1.---,....
'\
I'"
\
. ,.
1
COLLECTOR CURRENT lIe) - A
COlLECTOR·TO·ElOTl£R VOLTAGE (VCE)=4 V
0.6
0.5 1.0 1.5
-BASE· TO·EIIITTER VOLTAGE (VBEI-V
Fig. 1
TYPICAL OUTPUT CHARACTERISTICS
FOR TYP E 40542
Fig. 2
CASE TEMPERATURE (Tcl=25 DC
500
400
BASE CURRENT (10)= 100 rnA
50
10
10 30
COLLECTOR-TO·EMITIER VOLTAGE (VCE)-V
Fig. 3
10
ms·J!i02
TYPICAL TRANSFER CHARACTERISTICS
FOR TYP E 40542
COLLECTOR· TO· EMITTER VOLTAGE IVCEI"' V
TYPICAL GAIN. BANDWIDTH PRODUCT
FOR TYPE 40542
COLLECTOR·TD-EMITTER VOLTAGE (VCEI-' V
CASE TEMPERATURE (Tcl=t5DC
1.6
0.5 1.0
BASE·TD- EMITTER VOLTAGE cYBEI-V
Fig. 4
2.0
9ZSSo3603
iii 1.'
~ 1.2
I1.0
i /IE
i 0.8/
0.6
! 0.'
~
0.2
0,
0.01
;' ..........
"-
\
\.
, '10.1
4 & 11
COLLECTOR CURRENT (Icl-A
Fig. 5
"-
, , 110
430

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File No. 304 - - - - - - - - - - - - - - - - - - - - - -_ _ _40542, 40543
TYPICAL DC BETA
FOR TYPE 40543
TYPICAL INPUT CHARACTERISTICS
FOR TYPE 40543
COLLECTOR·TO-EMlnER VOLTAGE (Vee) • .c v
CASE TEMPERAlURE (Tel. l50 C
.70
1l!
;
S so
i ..
.
I
~
30
..
V
V
. /I--r--.
I'\.
1\
\
~ 10
...D
...
0.01 D.I
COLLECTOR CURRENT (Iel-A
9ZSSol681
BASE· TO· EMITTER VOLTAGE (VBE)-V
Fig. 6
Fig. 7
TYPICAL OUTPUT CHARACTERISTICS
FOR TYPE 40543
ID
CUJ.ECl1III.TO-EllTTERVOLTAGE IVCEl-V
TYPICAL TRANSFER CHARACTERISTICS
FOR TYPE 40543
Fig. 8
TYPICAL GAIN·BANDWIDTH PRODUCT
FOR TV PE 40543
BAIE-TQ-EIIITTERVOLTAGE IVBE)-V
Fig. 9
COLLECTOR-TO·EMITTER VOLTAGE (VCEI- 4V
CASE TEMPERATURE (Tc)= 250e
1.'
r--.1.4
, /1.2
"~
gt; 1.0/
IE 0.8
iS 0.6
0.4
1\
\
1\
. . . . . .~ 0.2
0
0.01
2
0.1 2
,
,2 10
COLLECTOR CURRENT (le)-A
Fig. 10
92S5-3594
431