Characteristics
PHR Series
Part No.
Curie
Temperature
Surface
Temperature
Nominal
Zero-power
Resistance
Rated
Voltage
Maximum
Voltage
Dimensions
Tc ( )
PHRA1301 P7A4
PHRA1181 P7A4
PHRA1701 P8B7
PHRA2501 P9B7
PHRA3801 B1B7
PHRA2301 B3A4
PHRA2701 B4B7
PHRA4501 B4B7
Note:
=Tolerance of R
25
70
70
80
90
210
230
240
240
Ts ( )
85
90
100
110
230
250
255
255
R
25
(
300
180
700
500
800
300
700
500
)
V
R
(V)
100/120
100/120
220/240
220/240
220/240
100/120
220/240
220/240
V
max
(V)
140
140
270
270
270
140
270
270
A 1(mm)
16
16
16
23.5
19
23.5
23.5
36
B
1(mm)
11
11
11
10
12
10
10
6
C 0.2(mm)
2.5
2.5
2.5
2.2
2.2
2.2
2.2
2.3
Reliability Test
Item
Test Condition / Methods
T
A
=LCT T
B
=UCT
Number of cycles:5
Duration: 30 min
T
=ln(R
Tc+25
/R
Tc+10
)
Standard
Rapid Change of
Temperature
IEC60068-2-14
Test N
a
Temperature Coefficient of
Resistance
Endurance at Upper
Category Temperature
15
R
Tc
=2Rmin
Temperature: UCT
Duration: 1000 hrs
IEC 60738-1
IEC 60738-1
Endurance at Maximum
Operating Temperature and
Maximum Voltage
Voltage: V
max
Temperature: UCT
Duration: 1000 hrs
IEC 60738-1
Endurance at Room
Temperature (Cycling)
Voltage: V
max
Temperature: 25 5
Number of cycle 10,000 or 100,000
IEC 60738-1
Damp Heat Steady State
Temperature: 40 5
Relative humidity of air: 95 98%Rh
Duration: 1000 hrs
IEC 60068-2-3
Test C
a
THINKING ELECTRONIC INDUSTRIAL Co., LTD.
Issue Date: July, 2004
2
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