***TCR code assigned as “X” - see How to Order chart.
Note: Solder pad and trace size should be evaluated and board surface temperature should not exceed +105 °C when applying
full rated power.
For Standard Values Used in Capacitors, Inductors and Resistors,
click here.
Asia-Pacific:
Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA:
Tel: +36 88 520 390 • Email: eurocus@bourns.com
The Americas:
Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
* RoHS Directive 2015/863, Mar 31, 2015 and Annex.
** Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br)
and Chlorine (Cl) content is 1500 ppm or less.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
The rated voltage is calculated by the following formula:
V= P
X
R
V:
Rated Voltage (V)
P:
Rated Power (W)
R:
Resistance Value (W)
-55
70
155
Ambient Temperature (°C)
Soldering Profile
275
+255 °C and +260 °C
225
220 °C
Temperature (°C)
190 °C
175
150 °C
90 - 150
seconds
Ramp Down
6 °C/second
60 - 120 seconds
10 seconds minimum
75
Ramp Up
3 °C/second maximum
25
<1>
Maximum of 20 seconds between
<1>
255 °C
260 °C peak
125
0
50
100
150
Time (seconds)
200
250
300
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
3312 - 2 mm SMD Trimming Potentiometer
CHP Series
Ultra-High Power Chip Resistors
How to Order
CHP 0603 - F X - 1002 E LF
Model
CHP = High Power Surge Resistor
Size
0603 = 0603 Size
0805 = 0805 Size
1206 = 1206 Size
2512 = 2512 Size
Resistance Tolerance
F = ±1 %
J = ±5 %
TCR (See Electrical Characteristics chart)
W = ±200 PPM/°C
X = ±100 PPM/°C (also includes CHP0805: 1 ohm to 9.76 ohms = ±150 PPM/°C)
Resistance Value
1 % Tolerance:
<100 ohms........“R” represents decimal point
(example: 24R3 = 24.3 ohms)
≥100 ohms ........First three digits are significant, fourth digit represents number of zeros to follow
(example: 8252 = 82.5K ohms)
5 % Tolerance:
<10 ohms..........“R” represents decimal point
(example: 4R7 = 4.7 ohms)
≥10 ohms ..........First two digits are significant, third digit represents number of zeros to follow
(example: 474 = 470K ohms)
Packaging
E = 5,000 pieces on 180 mm (7 inch) plastic reel, paper tape - CHP0603, CHP0805, CHP1206
3,000 pieces on 180 mm (7 inch) reel, plastic tape - CHP2512
Termination
LF = Tin-plated (RoHS Compliant)
Performance Characteristics
Test
Short Time Overload
Temperature Cycling
Load Life
Load Life with Humidity
Resistance to Solder
Heat
Solderability
Board Flex
Procedure (IEC 60115-1)
5 times rated power for 5 seconds
Repeat 5 cycles as follows:
-55 °C (30 min.) --> 25 °C (2-3 min.)--> 155 °C (30 min.) --> 25 °C (2~2 min.)
1.5 hours at rated voltage followed by a pause of 0.5 hour at 70 ± 2 °C;
Cycle repeated for 1000 hours
40 ±2 °C with 90~95 % relative humidity;
DC rated voltage for 1.5 hours “ON”, 0.5 hour “OFF”;
Cycle repeated for 1000 hours
260 ±5 °C for 10 ±1 seconds
After immersing flux, dip in 245 ±2 °C molten solder bath for 3 ± 0.5 seconds
Bending 2 mm
Test Limits
DR
1 % Tolerance ≤ ±1 %
5 % Tolerance ≤ ±2 %
1 % Tolerance ≤ ±0.5 %
5 % Tolerance ≤ ±1 %
1 % Tolerance ≤ ±1 %
5 % Tolerance ≤ ±3 %
1 % Tolerance ≤ ±1 %
5 % Tolerance ≤ ±3 %
1 % Tolerance ≤ ±0.5 %
5 % Tolerance ≤ ±1 %
At least 95 % of termination
must be covered with solder..
1 % Tolerance ≤ ±0.5 %
5 % Tolerance ≤ ±1 %
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
CHP Series
Ultra-High Power Chip Resistors
Typical Part Marking
±5 % (E24):
CHP0603, CHP0805, CHP1206, CHP2512
Resistance value is expressed by 3 digits. The first two digits represent the significant figures of the nominal
resistance value in ohms; the third digit represents the exponent for a base of 10.
Example:
301
= 30 x 10
1
= 300 ohms
301
301
±1 %
301
(E24/E96):
1542
1542
1542
1542
222
222
222
222
01B
301
CHP0805, CHP1206, CHP2512
Resistance value is expressed by 4 digits. The first three digits represent the significant figures of the nominal
resistance value in ohms; the third digit represents the exponent for a base of 10.
Example:
1542
= 154 x 10
2
= 15.4K ohms
±1 % (E24):
CHP0603
Resistance value is expressed by 3 digits. The first two digits represent the significant figures of the nominal
resistance value in ohms; the third digit represents the exponent for a base of 10.
Example:
222
= 22 x 10
2
= 2.2K ohms
±1 % (E96):
01B
01B
01B
CHP0603
Resistance value is expressed by 2 digits followed by an alpha character multiplier. (Refer to marking table below.)
Example:
01B
= 100 x 10
1
= 1K ohms
Code R Value
01
02
03
04
05
06
07
08
09
10
11
12
100
102
105
107
110
113
115
118
121
124
127
130
Code
13
14
15
16
17
18
19
20
21
22
23
24
R Value
133
137
140
143
147
150
154
158
162
165
169
174
Code
25
26
27
28
29
30
31
32
33
34
35
36
R Value
178
182
187
191
196
200
205
210
215
221
226
232
Code
37
38
39
40
41
42
43
44
45
46
47
48
R Value Code
237
243
249
255
261
267
274
280
287
294
301
309
49
50
51
52
53
54
55
56
57
58
59
60
R Value
316
324
332
340
348
357
365
374
383
392
402
412
Code R Value
61
62
63
64
65
66
67
68
69
70
71
72
422
432
442
453
464
475
487
499
511
523
536
549
Code
73
74
75
76
77
78
79
80
81
82
83
84
R Value
562
576
590
604
619
634
649
665
681
698
715
732
Code R Value
85
86
87
88
89
90
91
92
93
94
95
96
750
768
787
806
825
845
866
887
909
931
953
976
This table shows the first two digits for the three-digit E96 part marking scheme. The third character is a letter multiplier:
A=10
0
B=10
1
C=10
2
D=10
3
E=10
4
F=10
5
G=10
-6
H=10
-7
X=10
-1
Y=10
-2
Z=10
-3
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
1 Introduction
In the mid-1960s, American scientist Maas conducted extensive experimental research on the charging process of open-cell batteries and proposed an acceptable charging curve for ...[详细]
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