MF-RX250 Bourns Inc., MF-RX250 Datasheet - Page 2

• Manufacturer Part Number: MF-RX250
• Description: FUSE PTC RESETTABLE 2.5A HOLD
• Manufacturer: Bourns Inc.
• Series: MF-RXr

Specifications of MF-RX250

• R Min/max: 0.050 ~ 0.080 Ohm
• Voltage - Max: 60V
• Time To Trip: 15.6s
• 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: 0.08ohm
• Operating Voltage: 60V
• Ptc Fuse Case: Radial Lead
• Initial Resistance Min: 0.05ohm
• Lead Spacing: 10.2mm
• External Depth: 3.1mm
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Additional Features
Represents total content. Layout may vary.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
Packaging options:
BULK: All models = 500 pcs. per bag.
TAPE & REEL: MF-RX110 – MF-RX160 = 1500 pcs. per reel; MF-RX185 – MF-RX375 = 1000 pcs. per reel
AMMO-PACK: MF-RX110 – MF-RX160 = 1000 pcs. per reel; MF-RX185 – MF-RX375 = 500 pcs. per reel
Typical Part Marking
DATE CODE
(FIRST DIGIT =
LAST DIGIT OF YEAR;
NEXT THREE DIGITS =
DAY OF YEAR)
PART
IDENTIFICATION
NOTE: Kinked lead option is available for
board standoff. Contact factory for
details.
Product Dimensions
MF-RX110
MF-RX135
MF-RX160
MF-RX185
MF-RX250
MF-RX300
MF-RX375
Bulk packaging, tape and reel and Ammo-
Pak available on most models
Resettable circuit protection
Patents pending
Model
MF-RX Series -
A
C
B
D
RX110
0180T
(0.512)
(0.571)
(0.642)
(0.701)
(0.839)
(0.980)
(1.118)
Max.
13.0
14.5
16.3
17.8
21.3
24.9
28.4
A
E
MANUFACTURER'S
TRADEMARK
LOT NO.
(T = TAIWAN
S = CHINA)
(0.709)
(0.772)
(0.839)
(0.902)
(1.039)
(1.181)
(1.319)
Max.
18.0
19.6
21.3
22.9
26.4
30.0
33.5
PTC Resettable Fuses
B
Multifuse
Product Designator
Series
Hold Current, Ihold
Packaging Options
Part Number Suffix Option
Examples:
MF-RX110 ..........................................Bulk packaging
*Packaged per EIA486-B
Applications
power supply, up to 60 V and a load to be
protected, including:
Almost anywhere there is a low voltage
- 0-14 = Kinked leads where straight leads are
- 0-17 = Straight leads where kinked leads are
(0.201)
(0.201)
(0.201)
(0.201)
(0.402)
(0.402)
(0.402)
How to Order
- 99 = As of date code April 1, 2005 all MF-RX
- 0-99 = Bulk Packaging with part number
- 2-99 = Tape and Reel with part number
110-375 (1.10 Amps - 3.75 Amps)
Nom.
10.2
10.2
10.2
- AP = Ammo-Pak*
5.1
5.1
5.1
5.1
- __ = Bulk Packaging without part number
Security and fire alarm systems
Loud speakers
Power transformers
RX = Radial Leaded Component
- 2 = Tape and Reel without part number
models are RoHS compliant. The suffix “-99”
can be used if a new part number is required
to reference the RoHS compliance.
MF-RX110-0-99 ....Bulk packaging with part
MF-RX110-2 ..........Tape and reel packaging
MF-RX110-2-99 ....Tape and reel packaging
®
suffix option
suffix option
suffix option*
suffix option
standard
standard
C
(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
MF - RX 110 - 0 - 99
number suffix option
with part number suffix
option
(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
D
(0.122)
(0.122)
(0.122)
(0.122)
(0.122)
(0.122)
(0.122)
Max.
3.1
3.1
3.1
3.1
3.1
3.1
3.1
E
0.001
Typical Time to Trip at 23 ßC
1000
0.01
100
0.1
10
1
1
0.81 (20AWG)
Style
1
1
1
1
1
1
1
Physical Characteristics
Fault Current (Amps)
Lead Dia.
(0.032)
(0.032)
(0.032)
(0.032)
(0.032)
(0.032)
(0.032)
0.81
0.81
0.81
0.81
0.81
0.81
0.81
MF-RX SERIES, REV. L, 02/06
DIMENSIONS =
10
Material
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
(INCHES)
MM
100