Datasheet > R251.250

R251.250

更新时间： 2024-01-17 23:37:30

品牌	Logo	应用领域
力特 - LITTELFUSE		/
页数	文件大小	规格书
1页	93K
描述
Axial Lead and Cartridge Fuses - Subminiature

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R251.250 技术参数

生命周期：	Active	Reach Compliance Code：	unknown
风险等级：	5.76	熔断特性：	VERY FAST
主体高度：	7.11 mm	主体长度或直径：	2.41 mm
电路保护类型：	Electric Fuse	保险丝类：	Supplemental
保险丝尺寸：	PICO	最高工作温度：	125 °C
最低工作温度：	-55 °C	物理尺寸：	2.41mm x 7.11mm
预放电的额定值：	0.0116 A2/s	额定分断能力：	50 A
额定电流：	0.25 A	额定电压：	125 V
参考标准：	CSA, PSE, UL	端子形状：	PIN WIRE
断开时间或延迟：	14400 s	Base Number Matches：	1

R251.250 数据手册

Axial Lead and Cartridge Fuses

Subminiature

QPL

PICO II Very Fast-Acting Fuse 251/253

The PICO^®II very fast-acting fuse is designed to meet an extensive array

of performance characteristics in a space-saving subminiature package.

ELECTRICAL CHARACTERISTICS:

% of Ampere

Rating

Ampere

Rating

Opening

Time

100%

1/16–15

1/16–7

4 hours, Minimum

1 second, Maximum

3 seconds, Maximum

10 seconds, Maximum

200%

12–15

AGENCY APPROVALS: Recognized under the Components

Program of Underwriters Laboratories and Certified by CSA.

Approved by METI from 1 through 5 amperes.

AGENCY FILE NUMBERS: UL E10480, CSA LR 29862.

REFERENCE TO MIL SPEC: Available in FM10 on QPL for

MIL-PRF-23419. To order, change 251 to 253 as shown below.

INTERRUPTING RATINGS:

38.1

(1.5")

7.11 (.280")

REF.

(1.5")

2.41 (.095")

DIA. REF.

1 A

300 amperes at rated voltage VDC.

0.64 (.025")

DIA.

50 amperes at rated voltage VAC.

EPOXY COATING

ENVIRONMENTAL SPECIFICATIONS:

Operating Temperature: –55°C to 125°C.

Shock: MIL-STD-202, Method 213, Test Condition I

(100 G’s peak for 6 milliseconds).

NOTE: .025" diameter for / –10A, .032" diameter for 12 –15A.

Vibration: MIL-STD-202, Method 201 (10–55 Hz);

Method 204, Test Condition C (55–2000 Hz at 10 G’s Peak).

Moisture Resistance: MIL-STD-202, Method 106.

PHYSICAL SPECIFICATIONS:

Average Time Current Curves

Materials: Encapsulated, Epoxy-Coated Body; Solder Coated Copper

Wire Leads.

100

Flammability Rating: UL 94V0

Soldering Parameters:

Wave Solder — 260°C, 10 seconds maximum.

Solderability: MIL-STD-202, Method 208.

Lead Pull Force: MIL-STD-202, Method 211, Test Condition A (will

withstand a 7 lb. axial pull test).

PACKAGING SPECIFICATIONS: Tape and Reel per EIA-296; T1:

2.062" (52.4mm) taped spacing; 5,000 per reel.

Option: Radial Lead Version; 0.4" lead spacing; to order, change

251 to 252.

PATENTED

ORDERING INFORMATION:

Std. Type

Catalog

Number

Mil. Type

Catalog

Number

Nominal

Resistance

Cold Ohms

Nominal

Ampere Voltage

Melting I t

0.1

Rating

A Sec.

R251.062

R251.125

R251.250

R251.375

R251.500

R251.750

R251 001

R251 01.5

R251 002

R251 02.5

R251 003

R251 03.5

R251 004

R251 005

R251 007

R251 010

R251 012

R251 015

R253.062

R253.125

R253.250

R253.375

R253.500

R253.750

R253 001

R253 01.5

R253 002

1/16

1/8

1/4

3/8

1/2

3/4

125

7.0

0.000113

0.00174

0.0116

0.0296

0.0598

0.153

0.256

0.587

0.405

0.721

1.19

1.70

0.665

0.395

0.01

0.001

0.280

0.175

0.128

1 /

0.0823

0.0473

0.0360

0.0290

0.0240

0.0204

0.0155

0.0105

0.00705

0.0055

0.00446

2 /

R253 003

3 /

1.58

0.05 0.1

100

1000

R253 004

R253 005

R253 007

R253 010

2.45

CURRENT IN AMPERES

4.14

10.4

25.5

45.2

R253 015

68.8

Note: Higher Ampere Ratings Available.

Contact Technical Assistance for Details

280

www. littelfuse. com

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