参数资料
型号: F1206A0R20FWTR
厂商: AVX Corporation
文件页数: 10/12页
文件大小: 0K
描述: FUSE 0.20A 32V FAST THIN 1206
标准包装: 3,000
系列: Accu-Guard®
保险丝类型: 板安装(不包括管筒式)
额定电流: 200mA
额定电压 - DC: 32V
响应时间: 快速
封装/外壳: 1206(3216 公制)
安装类型: 表面贴装
尺寸/尺寸: 0.122" L x 0.063" W x 0.047" H (3.10mm x 1.60mm x 1.20mm)
额定电压时的断路容量: 50A
熔化 I²t: 0.00002
批准: cUL,UL
工作温度: -55°C ~ 125°C
包装: 带卷 (TR)
DC 抗冷流: 0.95 欧姆
Accu-Guard ?
SMD Thin-Film Fuse
DESIGNING FOR CURRENT
PULSE SITUATIONS
1. Sine wave current pulse
The Joule integral for sine wave pulse is
[(I max. ) 2 x t]/2,
see Fig. 1a.
l max.
2. Triangular current pulse
The Joule integral for triangular pulse is
[(Imax.) 2 x t]/3,
see Fig. 2a.
t
l max.
t
Fig. 1a. Sine wave pulse parameters for Joule
integral calculation, example #1.
Thus, for the current pulse in Figure 1b, the Joule integral is
[(4.8A) 2 x 7.7 x 10 -6 sec]/2 = 8.9 x 10 -5 A 2 sec.
10 μ sec/div
1A/div
Fig. 1b. Sine wave pulse, example #1.
The pulse duration is 7.7μsec. We must find a fuse that can
absorb at least 8.9 x 10 -5 X 2 = 1.8 x 10 -4 A 2 sec Joule inte-
gral within 7.7 μsec without actuation. According to the I 2 t
graph on page 6, pre-arcing Joule integral is 2.3x10 -4 A 2 sec
for the 0.5A fuse, which is slightly more than needed. The
next lower rating (0.375A), has only 6x10 -5 A 2 sec, which is
not enough. Therefore, 0.5A fuse should be chosen for this
application, see Figure 1c.
Fig. 2a. Triangular pulse parameters for Joule
integral calculation, example #2.
Thus, for the current pulse in Figure 2b, the Joule integral is
[(1.5A) 2 x 3 x 10 -3 sec]/3 = 2.25 x 10 -3 A 2 sec.
2 msec/div
0.5A/div
Fig. 2b. Triangular pulse, example #2.
The pulse duration is 3 msec. In the I 2 t graph on page 6, pre-
arcing Joule integral for 3 msec pulse is 4 x 10 -3 A 2 sec for the
0.5A fuse (not enough) and 2 x 10 -2 for the 0.75A fuse (more
than enough). Therefore, 0.75A fuse should be chosen for
this application, see Figure 2c.
FUSE PRE-ARCING JOULE INTEGRALS
vs. PRE-ARCING TIME
FUSE PRE-ARCING JOULE INTEGRALS
vs. PRE-ARCING TIME
100
10
PRE-ARCING TIME l 2 t, A 2 sec
100
PRE-ARCING TIME
l 2 t,
A 2
sec
1
10 -1
10
1
10 -1
10 -2
10 -3
10 -4
0.75A
x
10 -2
10 -3
0.5A
10 -5
10 -7 10 -6 10 -5 10 -4 10 -3 10 -2 10 -1
PRE-ARCING TIME, sec
1
10
10 -4
10 -5
x
Fig. 2c. Choice of 0.75A fuse, example #2.
10 -5 10 -4 10 -3 10 -2 10 -1
10
10
1
10
32
-7 -6
PRE-ARCING TIME, sec
Fig. 1c. Choice of 0.5A fuse, example #1.
Pre-arcing I 2 t
Maximum I 2 t design rule
I 2 t for sample current pulse
X
X
Pre-arcing I 2 t
Maximum I 2 t design rule
I 2 t for sample switch-on pulse
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F1206A0R25FSTR 功能描述:FUSE 0.25A 32V FAST THIN 1206 RoHS:是 类别:过电压,电流,温度装置 >> 保险丝 系列:Accu-Guard® 标准包装:100 系列:MSTU 250 保险丝类型:板安装(不包括管筒式) 额定电流:1.6A 额定电压 - AC:250V 额定电压 - DC:- 响应时间:慢速 封装/外壳:径向,罐状,垂直 安装类型:通孔 尺寸/尺寸:0.335" 直径 x 0.335" L(8.50mm x 8.50mm) 额定电压时的断路容量:50A 熔化 I²t:17.5 批准:CCC,cULus 工作温度:-40°C ~ 85°C 颜色:- 包装:散装 DC 抗冷流:- 其它名称:34.721734.7217-ND
F1206A0R25FWTR 功能描述:保险丝 0.25A SMD RoHS:否 制造商:Littelfuse 产品:Surface Mount Fuses 电流额定值:0.5 A 电压额定值:600 V 保险丝类型:Fast Acting 保险丝大小/组:Nano 尺寸:12.1 mm L x 4.5 mm W 安装风格: 端接类型:SMD/SMT 系列:485
F1206A0R37FWTR 功能描述:保险丝 0.37A SMD RoHS:否 制造商:Littelfuse 产品:Surface Mount Fuses 电流额定值:0.5 A 电压额定值:600 V 保险丝类型:Fast Acting 保险丝大小/组:Nano 尺寸:12.1 mm L x 4.5 mm W 安装风格: 端接类型:SMD/SMT 系列:485
F1206A0R50FSTR 功能描述:FUSE 0.50A 32V FAST THIN 1206 RoHS:是 类别:过电压,电流,温度装置 >> 保险丝 系列:Accu-Guard® 标准包装:100 系列:MSTU 250 保险丝类型:板安装(不包括管筒式) 额定电流:1.6A 额定电压 - AC:250V 额定电压 - DC:- 响应时间:慢速 封装/外壳:径向,罐状,垂直 安装类型:通孔 尺寸/尺寸:0.335" 直径 x 0.335" L(8.50mm x 8.50mm) 额定电压时的断路容量:50A 熔化 I²t:17.5 批准:CCC,cULus 工作温度:-40°C ~ 85°C 颜色:- 包装:散装 DC 抗冷流:- 其它名称:34.721734.7217-ND
F1206A0R50FWTR 功能描述:保险丝 0.50A SMD RoHS:否 制造商:Littelfuse 产品:Surface Mount Fuses 电流额定值:0.5 A 电压额定值:600 V 保险丝类型:Fast Acting 保险丝大小/组:Nano 尺寸:12.1 mm L x 4.5 mm W 安装风格: 端接类型:SMD/SMT 系列:485