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Data Sheet
PT8A335xA/B
Ceramic Heat Controller(LCD)
Features
High watt density Alumina Heaters
Pulse trigger with high current for SCR
Quickly Heat-Up and Quickly Lost-Heat Recover
External adjustable to fit wide range heating plates
External adjustable to fit TCR of sensors
Full temperature compensation and insensitive to
environment temperature
Internal zener
11 heat temperature settings
Auto power off for PT8A3351/3/5/7
Backlights for indicating work status
LCD screen for showing temperature setting
Dual Temperature (Fahrenheit/Centigrade) Display
Wet function: It will keep heating on state to level 2.
Dual voltage (120V/240V) operations.
Lead free SOIC-24 package
Description
The PT8A335xA/B is special designed for ceramic
heating control with 11 temperature levels(show as
below function comparison table). It can drive SCR
directly and detect heater temperature by heater-self
without extra temperature sensor.
It has 3 keys for
function setting. LCD displays and backlight indicate the
working status. Build-in timer will be auto-power off
after power on 1 hour for 60Hz or 1.2 hour for 50Hz.
Application
Ceramic heating controller
Function Comparison Table
P/N
PT8A3351A
PT8A3351B
PT8A3352A
PT8A3352B
PT8A3353A
PT8A3353B
PT8A3354A
PT8A3354B
PT8A3355A
PT8A3355B
PT8A3356A
PT8A3356B
PT8A3357A
PT8A3357B
PT8A3358A
PT8A3358B
Last setting load
Y
N
Y
N
Y
N
Y
N
Y
N
Y
N
Y
N
Y
N
Timer
Y
Y
N
N
Y
Y
N
N
Y
Y
N
N
Y
Y
N
N
Temperature Range
100-200
100-200
100-200
100-200
130-230
130-230
130-230
130-230
120-220
120-220
120-220
120-220
160-230
160-230
160-230
160-230
210-395
210-395
210-395
210-395
265-445
265-445
265-445
265-445
250-430
250-430
250-430
250-430
320-445
320-445
320-445
320-445
Application Circuit
R1
510K
D1
1N4007
L
R2
510K
R5
8.2K
R3
43K 2W
R4
VDD
C1
47uF
C2
0.1uF
R7
1K
D10
R9
LED
RA1
RA2
RS1
U1
20
1
L3
VDD
18
19
21
RX1
BL
GATE
VB
COM4 17
COM3 16
COM2
15
COM1 14
SEG6 13
PTC
SEG5 12
SEG4 11
SEG3 10
SEG2 9
SEG1 8
L5 7
24
REF2
GND
3
L4
6
U2
COM4
COM3
COM2
COM1
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
R13
20K
Show ?
10K
10K Show ?
D4 1N4148
VDD
LCD1
LCD1
COM4
COM3
COM2
COM1
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
S5
OFF
S4
CLK
L1
L2
2
4
5
RS2
S1
S2
ON/OFF UP
R10
10K
C4
10~33n
D7
RL207
43K 2W
Q1
SCR
0.47~2K
R6
C3
0.1u
200
D2
1N4007
RES2
Curler2
RES1
Curler2
RB2
RB1
R8
100
RX2
C6
0.1u
22
10
9
8
7
6
5
4
3
2
1
COM4
COM3
COM2
COM1
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
DOWN
R12
10K
R11
10K
23
REF1
D6
1N4007
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