MF-R250 Bourns Inc., MF-R250 Datasheet - Page 2

• Manufacturer Part Number: MF-R250
• Description: FUSE PTC RESET 2.50A HOLD
• Manufacturer: Bourns Inc.
• Series: MF-Rr

Specifications of MF-R250

• R Min/max: 0.025 ~ 0.048 Ohm
• Voltage - Max: 30V
• Time To Trip: 10.3s
• Current - Hold (ih) (max): 2.5A
• Current - Trip (it): 5A
• Current - Max: 40A
• Package / Case: Radial
• Holding Current: 2.5A
• Tripping Current: 5A
• Initial Resistance Max: 0.048ohm
• Operating Voltage: 30V
• Ptc Fuse Case: Radial Lead
• Initial Resistance Min: 0.025ohm
• Lead Spacing: 5.1mm
• Application: Almost anywhere there is a low Voltage power Supply and a load to be protected, including computers and peripherals, general electronics and automotive applications
• Brand/series: MF-R Series
• Current, Holding: 2.50 A @ 23 °C
• Current, Rating: 40 A
• Current, Ratings: 40 A
• Current, Tripping: 5.00 A @ 23 °C
• Dimensions: 0.472x0.118x0.72 "
• Mounting Type: PCB
• Primary Type: Resettable
• Resistance: 0.025 Ohms @ 23 °C
• Resistance, Dc: 0.025 Ohms
• Standards: UL Recognized, CSA Certified, TUV Certified
• Temperature, Operating, Maximum: 85 °C
• Temperature, Operating, Minimum: -40 °C
• Terminal Type: Radial Leaded
• Termination: Radial
• Thermistor Type: Resettable
• Tripped Power Dissipation: 1.20 W @ 23 °C
• Voltage, Rating: 30 VDC
• External Depth: 3mm
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Additional Features
■
■
Packaging options: BULK: All models = 500 pcs. per bag.
Product Dimensions (see next page for outline drawing)
MF-R005
MF-R010
MF-R017
MF-R020
MF-R025
MF-R030
MF-R040
MF-R050
MF-R065
MF-R075
MF-R090
MF-R090-0-9
MF-R110
MF-R135
MF-R160
MF-R185
MF-R250
MF-R250-0-10
MF-R300
MF-R400
MF-R500
MF-R600
MF-R700
MF-R800
MF-R900
MF-R1100
Bulk packaging, tape and reel and Ammo-Pak available on most models
Patents pending
Model
MF-R Series - PTC Resettable Fuses
TAPE & REEL: MF-R005-MF-R160 - 12.7 mm device pitch = 3000 pcs. per reel;
MF-R185-MF-R400 - 25.4mm device pitch = 1500 pcs. per reel; MF-R250-0-10 = 1500 pcs. per reel.
AMMO-PACK: MF-R005-MF-R160 - 12.7 mm device pitch = 2000 pcs. per reel;
MF-R185-MF-R400 - 25.4 mm device pitch = 1000 pcs. per reel; MF-R090-0-9 & MF-R250-0-10 =
2000 pcs. per reel.
(0.315)
(0.291)
(0.291)
(0.291)
(0.291)
(0.291)
(0.291)
(0.311)
(0.382)
(0.409)
(0.461)
(0.291)
(0.350)
(0.350)
(0.402)
(0.472)
(0.472)
(0.472)
(0.472)
(0.567)
(0.685)
(0.760)
(0.870)
(0.953)
(0.953)
(0.953)
Max.
10.4
11.7
10.2
12.0
12.0
12.0
12.0
14.4
17.4
19.3
22.1
24.2
24.2
24.2
8.0
7.4
7.4
7.4
7.4
7.4
7.4
7.9
9.7
7.4
8.9
8.9
A
(0.327)
(0.528)
(0.539)
(0.539)
(0.598)
(0.630)
(0.657)
(0.480)
(0.551)
(0.744)
(0.661)
(0.724)
(0.720)
(0.720)
(0.720)
(0.976)
(0.980)
(1.256)
(1.173)
(1.295)
(1.295)
(1.295)
Max.
12.7
12.7
12.7
12.7
13.4
13.7
13.7
15.2
16.0
16.7
12.2
14.0
18.9
16.8
18.4
18.3
18.3
18.3
24.8
24.9
31.9
29.8
32.9
32.9
32.9
(0.5)
(0.5)
(0.5)
(0.5)
8.3
B
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.201)
(0.402)
(0.402)
(0.402)
(0.402)
(0.402)
(0.402)
Nom.
10.2
10.2
10.2
10.2
10.2
10.2
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
C
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
(0.028)
Tol. ±
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
Customers should verify actual device performance in their specifi c applications.
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
(0.299)
Min.
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
7.6
D
(0.122)
(0.122)
(0.122)
(0.122)
(0.122)
(0.122)
(0.122)
(0.122)
(0.122)
(0.122)
(0.122)
(0.118)
(0.118)
(0.118)
(0.118)
(0.118)
(0.118)
(0.118)
(0.118)
(0.118)
(0.118)
(0.118)
(0.118)
(0.118)
(0.118)
(0.118)
Max.
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
E
Specifi cations are subject to change without notice.
0.405 (26AWG)
0.51 (24AWG)
0.81 (20AWG)
Style
4
1
1
1
1
1
1
1
1
1
1
3
1
1
1
1
2
3
2
2
2
2
2
2
2
2
Physical Characteristics
Lead Dia.
(0.016)
(0.020)
(0.020)
(0.020)
(0.020)
(0.020)
(0.020)
(0.020)
(0.020)
(0.020)
(0.020)
(0.020)
(0.020)
(0.020)
(0.020)
(0.020)
(0.032)
(0.020)
(0.032)
(0.032)
(0.032)
(0.032)
(0.032)
(0.032)
(0.032)
(0.032)
0.405
0.51
0.51
0.51
0.51
0.51
0.51
0.51
0.51
0.51
0.51
0.51
0.51
0.51
0.51
0.51
0.81
0.51
0.81
0.81
0.81
0.81
0.81
0.81
0.81
0.81
DIMENSIONS:
Material
Sn/CuFe
Sn/CuFe
Sn/CuFe
Sn/CuFe
Sn/CuFe
Sn/CuFe
Sn/CuFe
Sn/NiCu
Sn/NiCu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
(INCHES)
MM