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  1. Polymeric Positive Temperature Coefficient thermistor
  2. Polymeric Positive Temperature Coefficient thermistor
  3. Polymeric Positive Temperature Coefficient thermistor
  4. Polymeric Positive Temperature Coefficient thermistor

Polymeric Positive Temperature Coefficient thermistor

PPTC (PPTC) polymer positive temperature coefficient thermistor (Polymeric Positive Temperature CoefficientThermistor PPTC), also known as the PolySwitch component, self recovery fuse is used with a p

  1. Details
  2. Technical Information
  3. Technology applicatiTechnology Applicationon
  4. Literature
  5. Test Reports and Certifications

PPTC (PPTC) polymer positive temperature coefficient thermistor (Polymeric Positive Temperature CoefficientThermistor PPTC), also known as the PolySwitch component, self recovery fuse is used with a positive temperature coefficient thermistor characteristic of polymer based conductive composites filled by a thermistor. Mainly used for circuit overload current and over temperature protection.

Taiwan Sea & Land company R & D and production of PPTC in 1999, so far has been the world famous brand OEM production, as well as their own brand products. Sea & Land PPTC components in a wide range of circuit protection applications (including treble speakers, sound separator) shows its superior performance, and UL / CSA / TUV / SGS security certification. Sea & Land PPTC device provides reliable protection circuit, self replacement, effectively reduce the repair warranty huge, but also greatly enhance the customer satisfaction. High cost Sea & Land PPTC in the industry has gradually become the preferred brand.

The company's Sea and land designated distributors in mainland and Hongkong.


PPTC介绍
高分子正温度系数热敏电阻(Polymeric Positive Temperature Coefficient thermistor ) 简称PPTC ,又称PolySwitch、
自恢复保险丝,也就是使用具有正温度系数热敏电阻特性之高分子基填充导电复合材料所构成之热敏电阻。    

 

PPTC工作原理
当正常工作电流通过或组件处于正常环境温度时,PPTC呈低阻状态, 导电粒子在聚合物中构成链状导电通路(图a);当电路中
有异常过电流通过或环境温度升高时,大电流或环境温度升高所产生的热量使聚合物迅速膨胀,切断导电粒子所构成的导电通路,
PPTC呈高阻状态;(图b)当电路中过电流(超温状态)消失后,聚合物冷却,体积恢复正常,其中导电粒子又重新构成导电通路,
PPTC又呈初始的低阻状态(图a)。

  

图片关键词     图片关键词     图片关键词

                                                                                                                                                     

PPTC电子属

图片关键词

     例表A ( 更多数据请参阅我司的《 Products Customized to Fit Your Specific Needs 》)

 

术语说明:
Ihold (正常/额定电流): 在23℃的环境下, PPTC的正常工作电流
Itrip (动作电流): 在23℃的环境下, PPTC的最小动作电流
Vmax (最大工作电压): PPTC在额定电流下, 不受损害,能经受的最大电压
Imax (最大电流): PPTC在额定电压下能经受而不损害的最大故障冲击电流
Pd (触发功率): 在23℃的环境下, PPTC在断开状态的耗散功率
TTT(动作时间):当被保护电路的电流是Ihold的五倍时PPTC的动作时间
Rimin/max (最小/最大电阻): 在23℃的环境下, PPTC在断开状态之前的内阻抗特性
R1max (断开后电阻): PPTC 在一定的电流和电压下断开一小时后, 恢复到初始状态的阻抗.

  

请按照如下方法正确地选用PPTC(参照例表A):

 

(1)         列出设备线路上的正常工作电流 (Ihold) ,并确定被保护电路最小触发电流(Itrip) ;

 

(2)         确定设备线路上最大的工作电压 (Vmax)与最大工作电流(Imax) ;

 

(3) 根据 Ihold, Vmax, Imax 值对照电子属性表(如例表A)选择一种 PPTC 系列;

 

(4) 根据选出的PPTC, 便可在电子属性表中(如例表A)对照出异常电流产生时的动作保护时间(TTT)。

 

须注意事项:
产品的环境温度对PPTC的保持电流Ihold值会有一定影响(如例表B)。

 

如果工作环境温度较大的偏离室温(23℃), 请根据温度-性能曲线(如例表B)选择相近的

 

PPTC,或问询本公司以确定所需产品。

 

Model
环境温度对保持电流(Ihold)的影响
R60 series
-40℃
-20℃
0℃
23℃
40℃
50℃
60℃
70℃
85℃
R60-050
0.78
0.68
0.60
0.50
0.41
0.36
0.32
0.27
0.20
R60-065
1.01
0.88
0.77
0.65
0.53
0.47
0.41
0.35
0.26
R60-075
1.16
1.02
0.89
0.75
0.61
0.54
0.47
0.41
0.30
例表B ( 更多数据请参阅我司的《 Products Customized to Fit Your Specific Needs 》)

                     

产品标识说明


图片关键词           图片关键词

 


Sea & Land  PPTC组件在广泛的电路保护应用中(包括高音喇叭、分音器)显示了其卓越的性能。

Sea & Land PPTC装置提供可靠、自恢复式的电路保护, 有效减少巨额的质保返修, 也大大提高了客户的满意度。


R30 Series


FeaturesApplications
■ Radial Leaded Devices 
■ Cured, flame retardant epoxy polymer 
insulating material meets 
UL 94V-0 requirements 
■ Bulk packaging,or tape and reel 
available on most models 
■ Agency recognition:UL/CSA/TUV approved
Almost anywhere there is a low voltage 
power supply, up to 30V and a load to be 
protected, including: 
■ Personal computer 
■ Loud Speakers ■Toys 
■ Industrial controls



  Electrical Properties



ModelIhold
(A)
Itrip
(A)
Vmax
Operating 
(Vdc)
Imax
(A)
P
Typ.
(W)
Maximum Time
To Cip
Resistance
Current
(A)
Time
(Sec)
Rimin.
(W)
Rimax.
(W)
R1max.
(W)
R30-090
R30-110
R30-135
R30-160
R30-185
R30-250
R30-300
R30-400
R30-500
R30-600
R30-700
R30-800
R30-900
0.90
1.10
1.35
1.60
1.85
2.50
3.00
4.00
5.00
6.00
7.00
8.00
9.00
1.80
2.20
2.70
3.20
3.70
5.00
6.00
8.00
10.00
12.00
14.00
16.00
18.00
30
30
30
30
30
30
30
30
30
30
30
30
30
40
40
40
40
40
40
40
40
40
40
40
40
40
0.6
0.7
0.8
0.9
1.0
1.2
2.0
2.5
3.0
3.5
3.8
4.0
4.2
4.50
5.50
6.75
8.00
9.25
12.5
15.0
20.0
25.0
30.0
35.0
40.0
45.0
5.9
6.6
7.3
8.0
8.7
10.3
10.8
12.7
14.5
16.0
17.5
18.8
20.0
0.070
0.050
0.040
0.030
0.030
0.020
0.020
0.010
0.010
0.005
0.005
0.005
0.005
0.145
0.120
0.085
0.070
0.060
0.040
0.050
0.030
0.030
0.020
0.020
0.020
0.010
0.220
0.170
0.130
0.110
0.090
0.070
0.080
0.050
0.050
0.040
0.030
0.020
0.020
Ihold = Hold Current. Maximum current device will not trip in 23°C still air. 
Itrip = Trip Current. Minimum current at which the device will always trip in 23°C still air. 
Vmax = Maximum operating voltage device can withstand without damage at rated current (Imax). 
Imax = Maximum fault current device can withstand without damage at rated voltage (Vmax). 
Pd = Typical power dissipated from device when in the tripped state in 23°C still air environment at rated voltage. 
Rimin/max = Minimum/Maximum device resistance prior to tripping at 23°C 
R1max = Maximum device resistance one hour after it is tripped at 23°C. 
CAUTION : Operation beyond the specified ratings may result in damage and possible arcing and flame.



  Environmental Specifications

 

TestConditionsResistance change
Passive aging+85°C, 1000 hrs.±5% typical
Humidity aging+85°C, 85% R.H.,1000 hrs±5% typical
Thermal shock+85°C to -40°C, 20 times±10% typical
Resistance to solventMIL-STD-202,Method 215No change
VibrationMIL-STD-202,Method 201No change
Ambient operating /storage conditions : - 40 °C to 85 °C
Maximum surface temperature of the device in the tripped state is 125 °C

 

AGENCY APPROVALS : 
图片关键词图片关键词图片关键词UL/CSA/TUV approved
AGENCY FILE NUMBER : UL FILE NO. E201504; CSA FILE NO. 216999 0000, TUV FILE NO. B 02 11 43486 001 
  Physical Dimensions (Unit: mm)

 

ModelA
Max.
B
Max.
C
Typ.
D
Min.
E
Max.
F
Max.
Lead
Style
R30-090
R30-110
R30-135
R30-160
R30-185
R30-250
R30-300
R30-400
R30-500
R30-600
R30-700
R30-800
R30-900
7.4/0.29
7.4/0.29
8.9/0.35
8.9/0.35
10.2/0.40
11.4/0.45
11.4/0.45
14.0/0.55
14.0/0.55
16.5/0.65
19.1/0.75
21.6/0.85
24.1/0.95
12.2/0.48
14.2/0.56
13.5/0.53
15.2/0.60
15.7/0.62
18.3/0.72
17.3/0.68
20.1/0.79
24.9/0.98
24.9/0.98
26.7/1.05
29.2/1.15
29.7/1.17
5.1/0.20
5.1/0.20
5.1/0.20
5.1/0.20
5.1/0.20
5.1/0.20
5.1/0.20
5.1/0.20
10.2/0.40
10.2/0.40
10.2/0.40
10.2/0.40
10.2/0.40
7.6/0.3
7.6/0.3
7.6/0.3
7.6/0.3
7.6/0.3
7.6/0.3
7.6/0.3
7.6/0.3
7.6/0.3
7.6/0.3
7.6/0.3
7.6/0.3
7.6/0.3
3.0/0.12
3.0/0.12
3.0/0.12
3.0/0.12
3.0/0.12
3.0/0.12
3.0/0.12
3.0/0.12
3.0/0.12
3.0/0.12
3.0/0.12
3.0/0.12
3.0/0.12
1.2/0.05
1.2/0.05
1.2/0.05
1.2/0.05
1.2/0.05
1.2/0.05
1.2/0.05
1.2/0.05
1.2/0.05
1.2/0.05
2.0/0.08
2.0/0.08
2.0/0.08
Kink
Kink
Kink
Kink
Kink
Kink
Kink
Kink
Kink
Kink
Straight
Straight
Straight
Physical CharacteristicsLead Material : R30-090 ~ 250: Tin/lead-plated copper-clad steel, 0.205mm2 (24AWG), Φ0.51mm(0.020 in). R30-300 ~ 900: Tin/lead-plated copper, 0.52mm2 (20AWG), Φ0.81mm(0.032 in). Lead Solderability : MIL-STD-202, Method 208E  Marking   图片关键词= Trademark 
R30 = Radial type 30 V 
135 = 1.35A hold current 
XXX = Date code 
Y = Factory code
   Order information
 R30 135 K or S R or U ModelReel Q'ty  Bag Q'ty
 Radial type Hold K= Kink leads R=Tape & reelR30-090 ~ R30-250 
R30-300 ~ R30-400 
R30-500 ~ R30-900
 3000 500
 30 V Current



 (A) S=Straight   leads U= Bulk   packaged

>>>Tape & Reel packaging per EIA468-B standard.Typical time-to-trip at 23°C图片关键词Thermal derating curve图片关键词

    Ihold versus temperature

 

ModelMaximum ambient operating temperature (Tmao) vs. hold current (Ihold)
-40°C-20°C0°C20°C40°C50°C60°C70°C85°C
R30-090
R30-110
R30-135
R30-160
R30-185
R30-250
R30-300
R30-400
R30-500
R30-600
R30-700
R30-800
R30-900
1.31
1.60
1.96
2.32
2.68
3.63
4.35
5.80
7.25
8.70
10.15
11.60
13.05
1.17
1.43
1.76
2.08
2.41
3.25
3.90
5.20
6.50
7.80
9.10
10.40
11.70
1.04
1.27
1.55
1.84
2.13
2.88
3.45
4.60
5.75
6.90
8.05
9.20
10.35
0.90
1.10
1.35
1.60
1.85
2.50
3.00
4.00
5.00
6.00
7.00
8.00
9.00
0.75
0.91
1.12
1.33
1.54
2.08
2.49
3.32
4.15
4.98
5.81
6.64
7.47
0.69
0.85
1.04
1.23
1.42
1.93
2.31
3.08
3.85
4.62
5.39
6.16
6.93
0.61
0.75
0.92
1.09
1.26
1.70
2.04
2.72
3.40
4.08
4.76
5.44
6.12
0.55
0.67
0.82
0.98
1.13
1.53
1.83
2.44
3.05
3.66
4.27
4.88
5.49
0.47
0.57
0.70
0.83
0.96
1.30
1.56
2.08
2.60
3.12
3.64
4.16
4.68

 

DimensionEIADimensions
DescriptionmarkDim.(mm)Tol.(mm)
Carrier tape width 
Hold down tape width 
Sprocket hole position 
Sprocket hole diameter 
Abscissa to plane (straight lead) R30-300 - R30-400 
Abscissa to plane (kinked lead) R30-090 - R30-250 
Abscissa to top R30-090 - R30-185 
Abscissa to top R30-250 - R30-400 
Overall width width lead protrusion: R30-090 - R30-250 
Overall width width lead protrusion: R30-300 - R30-400 
Overall width without lead protrusion: R30-090 - R30-250 
Overall width without lead protrusion: R30-300 - R30-400 
Lead protrusion 
Sprocket hole pitch 
Device pitch: R30-090 - R30-250 
Device pitch: R30-300 - R30-400 
Tape thickness 
Tape thickness with splice 
Body lateral deviation 
Body tape plane deviation 
Ordinate to adjacent component lead R30-090 - R30-250 
Ordinate to adjacent component lead R30-300 - R30-400 
Lead spacing: R30-090 - R30-400 
Reel width R30-090 - R30-300 
Reel width R30-400 
Reel diameter 
Dimension between flanges: R30-090 - R30-300 
Dimension between flanges: R30-400 
Arbor hole diameter 
Core diameter
W
W4
W5
D0
H
H0
H1
H1
C1
C1
C2
C2
L1
P0
t
t1
△h
△p
P1
P1
F
w2
w2
a
w1
w1
c
n
18
11
9
4
18.5
16
32.2
35.4
43.2
44.9
42.5
44.2
1.0
12.7
12.7
25.4
0.9
2.0
0
0
3.81
10.3
5.1
56
63.5
340
42
56
26
80
+1.0/-0.5
Min.
+0.75/-0.5 
±0.2
±2.5
±0.5
Max.
Max.
Max.
Max.
Max.
Max.
Max.
±0.3
Max.
Max.
±1.0
±1.3
±1.0
±1.0
±0.8
Max.
Max.
±2
±1
±1
±12.0
Max.




EIA Referenced Taped Component Dimentions  

图片关键词

EIA Referenced Taped Component Dimentions  

图片关键词



R60 Series


FeaturesApplications
■ Radial Leaded Devices 
■ Cured, flame retardant epoxy polymer 
insulating material meets 
UL 94V-0 requirements 
■ Bulk packaging,or tape and reel 
available on most models 
■ Agency recognition:UL/CSA/TUV approved
Almost anywhere there is a low voltage 
power supply, up to 60V and a load to be 
protected, including: 
■ Industrial controls 
■ Automotive electronics 
■ Medical product



  Electrical Properties



ModelIhold
(A)
Itrip
(A)
Vmax
Operating 
(Vdc)
Imax
(A)
P
Typ.
(W)
Maximum Time
To Cip
Resistance
Current
(A)
Time
(Sec)
Rimin.
(W)
Rimax.
(W)
R1max.
(W)
R60-010
R60-017
R60-020
R60-025
R60-030
R60-040
R60-050
R60-065
R60-075
R60-090
R60-110
R60-135
R60-160
R60-185
R60-250
R60-300
R60-375
0.10
0.17
0.20
0.25
0.30
0.40
0.50
0.65
0.75
0.90
1.10
1.35
1.60
1.85
2.50
3.00
3.75
0.20
0.34
0.40
0.50
0.60
0.80
1.00
1.30
1.50
1.80
2.20
2.70
3.20
3.70
5.00
6.00
7.50
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
0.38
0.48
0.41
0.45
0.49
0.56
0.77
0.88
0.92
0.99
1.50
1.70
1.90
2.10
2.50
2.80
3.20
0.50
0.85
1.00
1.25
1.50
2.00
2.50
3.25
3.75
4.50
5.50
6.75
8.00
9.25
12.50
15.00
18.75
4.0
3.0
2.2
2.5
3.0
3.8
4.0
5.3
6.3
7.2
8.2
9.6
11.4
12.6
15.6
19.8
24.0
2.50
3.30
1.83
1.25
0.88
0.55
0.50
0.31
0.25
0.20
0.15
0.12
0.09
0.08
0.05
0.04
0.03
4.50
5.21
2.75
1.95
1.33
0.86
0.77
0.48
0.40
0.31
0.25
0.19
0.14
0.12
0.08
0.06
0.05
7.50
8.00
4.40
3.00
2.10
1.29
1.17
0.72
0.60
0.47
0.38
0.30
0.22
0.19
0.13
0.10
0.08
Ihold = Hold Current. Maximum current device will not trip in 23°C still air. 
Itrip = Trip Current. Minimum current at which the device will always trip in 23°C still air. 
Vmax = Maximum operating voltage device can withstand without damage at rated current (Imax). 
Imax = Maximum fault current device can withstand without damage at rated voltage (Vmax). 
Pd = Typical power dissipated from device when in the tripped state in 23°C still air environment at rated voltage. 
Rimin/max = Minimum/Maximum device resistance prior to tripping at 23°C 
R1max = Maximum device resistance one hour after it is tripped at 23°C. 
CAUTION : Operation beyond the specified ratings may result in damage and possible arcing and flame.



  Environmental Specifications



TestConditionsResistance change
Passive aging+85°C, 1000 hrs±5% typical
Humidity aging+85°C, 85% R.H.,1000 hrs±5% typical
Thermal shock+85°C to -40°C, 20 times±10% typical
Resistance to solventMIL-STD-202,Method 215No change
VibrationMIL-STD-202,Method 201No change
Ambient operating /storage conditions : - 40 °C to 85 °C



AGENCY APPROVALS :图片关键词图片关键词图片关键词UL/CSA/TUV approved

AGENCY FILE NUMBER : UL FILE NO. E201504; CSA FILE NO. 216999 0000, TUV FILE NO. B 02 11 43486
  Physical Dimensions (Unit: mm)

 

ModelA
Max.
B
Max.
C
Typ.
D
Min.
E
Max.
F
Max.
Lead
Style
R60-010
R60-017
R60-020
R60-025
R60-030
R60-040
R60-050
R60-065
R60-075
R60-090
R60-110
R60-135
R60-160
R60-185
R60-250
R60-300
R60-375
7.4/0.29 
7.4/0.29 
7.4/0.29 
7.4/0.29 
7.4/0.29 
7.6/0.30 
7.9/0.31 
9.7/0.38 
10.4/0.41 
11.7/0.46 
13.0/0.51 
14.5/0.57 
16.3/0.64 
17.8/0.70 
21.3/0.84 
24.9/0.98 
28.5/1.12
12.7/0.50 
12.7/0.50
12.2/0.48 
12.7/0.50 
13.0/0.51 
13.5/0.53 
13.7/0.54 
14.5/0.57 
15.2/0.60 
15.8/0.62 
18.0/0.71 
19.6/0.77 
21.3/0.84 
22.9/0.90 
26.4/1.04 
30.0/1.18 
33.5/1.32
5.1/0.20 
5.1/0.20 
5.1/0.20 
5.1/0.20 
5.1/0.20 
5.1/0.20 
5.1/0.20 
5.1/0.20 
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10.2/0.40 
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7.6/0.3 
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1.0/0.04 
1.7/0.07 
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1.2/0.05 
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1.5/0.06 
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2.0/0.08 
2.0/0.08
Kink
Kink
Kink
Kink
Kink
Kink
Kink
Kink
Kink
Kink
Straight
Straight
Straight
Straight
Straight
Straight
Straight

Dimensions

图片关键词
  Marking  

图片关键词

= Trademark 
R60 = Radial type 60 V 
135 = 1.35A hold current 
XXX = Date code 
Y = Factory code

Physical Characteristics
Lead Material : 
R60-010: Tin/lead-plated nickel-copper alloy, 0.205mm2 (24AWG), Φ0.51mm(0.020 in). 
R60-017 ~ 040: Tin/lead-plated copper-clad steel, 0.205mm2 (24AWG), Φ0.51mm(0.020 in). 
R60-050 ~ 090: Tin/lead-plated copper steel, 0.205mm2 (24AWG), Φ0.51mm(0.020 in). 
R60-110 ~ 375: Tin/lead-plated copper steel, 0.52mm2 (20AWG), Φ0.81mm(0.032 in). 
Lead Solderability : MIL-STD-202, Method 208E   Order informationPacking  R60 185 K or S R or U Model Reel Q'ty Bag Q'ty Radial type Hold K=Kink leads R= Tape & R60-010 ~ R60-090 3000 500 60 V Current  Reel R60-0172500 500  (A) S=Straight U= Bulk R60-110 ~ R60-1851500 500   leads packaged R60-250 ~ R60-375 500

  Typical time-to-trip at 23°C

图片关键词

 Thermal derating curve

图片关键词

    Ihold versus temperature


 


ModelMaximum ambient operating temperature (Tmao) vs. hold current (Ihold)-40°C-20°C0°C20°C40°C50°C60°C70°C85°

CR60-010R60-017R60-020R60-025R60-030R60-040R60-050R60-065R60-075R60-090R60-110R60-135R60-160R60-185R60-250R60-300R60-

3750.160.260.310.390.470.620.781.011.161.401.712.092.482.873.884.655.810.140.230.270.340.410.540.680.881.021.221.501.842.182.523.

404.085.100.120.200.240.300.360.480.600.770.891.071.311.611.902.202.983.574.460.100.170.200.250.300.400.500.650.750.901.101.351.

601.852.503.003.750.080.140.160.200.240.320.410.530.610.730.891.091.301.502.032.433.040.070.120.140.180.220.290.360.470.540.650.

790.971.151.331.802.162.700.060.110.130.160.190.250.320.410.470.570.690.851.011.171.581.892.360.050.090.110.140.160.220.270.350.410.

490.590.730.861.001.351.622.030.040.070.080.100.120.160.200.260.300.360.440.540.640.741.001.201.50



DimensionEIADimensions
DescriptionmarkDim.(mm)Tol.(mm)
Carrier tape width 
Hold down tape width 
Sprocket hole position 
Sprocket hole diameter 
Abscissa to plane (straight lead) R60-110 - R60-185 
Abscissa to plane (kinked lead) R60-010 - R60-090 
Abscissa to top R60-010 - R60-090 
Abscissa to top R60-110 - R60-185 
Overall width width lead protrusion: R60-090 - R60-250 
Overall width width lead protrusion: R60300 - R60-400 
Overall width without lead protrusion: R60-090 - R60-250 
Overall width without lead protrusion: R60-300 - R60-400 
Lead protrusion 
Sprocket hole pitch 
Device pitch: R60-010 - R60-090 
Device pitch: R60-110 - R60-185 
Tape thickness 
Tape thickness with splice 
Body lateral deviation 
Body tape plane deviation 
Ordinate to adjacent component lead R60-010 - R60-090 
Ordinate to adjacent component lead R60-110 - R60-185 
Lead spacing: R60-010 - R60-185 
Reel width R60-010 - R60-135 
Reel width R60-160 - R60-185 
Reel diameter 
Dimension between flanges: R60-010 - R60-135 
Dimension between flanges: R60-160 - R60-185 
Arbor hole diameter 
Core diameter
W
W4
W5
D0
H
H0
H1
H1
C1
C1
C2
C2
L1
P0 


t
t1
△h
△p
P1
P1
F
w2
w2
a
w1
w1
c
n
18
11
9
4
18.5
16
32.2
37.6
43.2
46.6
42.5
46.0
1.0
12.7
12.7
25.4
0.9
2.0
0
0
3.81
10.3
5.1
56
63.5
340
42
56
26
80
+1.0/-0.5
Min.
+0.75/-0.5 
±0.2
±2.5
±0.5
Max.
Max.
Max.
Max.
Max.
Max.
Max.
±0.3
Max.
Max.
±1.0
±1.3
±1.0
±1.0
±0.8
Max.
Max.
±2
±1
±1
±12.0
Max.

EIA Referenced Taped Component Dimentions

图片关键词

EIA Referenced Taped Component Dimentions  

图片关键词