Description
• Axial-leaded time-delay thru-hole fuse
• Matte tin-plated copper lead wires
• High temperature epoxy plastic body, UL 94V0
Agency Information
• UL Recognition Guide & File numbers: JDYX2 &
E19180.
• CSA Certification Record No: LR 701159 & Class No:
1422 30 and 1422 01.
Environmental Data
• Shock resistance: MIL-STD-202, Method 213B, Test
Condition I (Sawtooth)
• Vibration resistance: MIL-STD-202, Method 201
(10-55Hz x 3 axis/ no load)
• Moisture resistance: MIL-STD-202F, Method 106
• Soldering heat resistance: MIL-STD-202, Method 210
Top side (260ºC, 20 sec)
• Salt spray: MIL-STD-202, Method 101, Test Condition
B (48 Hours)
• Solderability MIL-STD-202, Method 208H
• Operating Temperating: -55ºC to 125ºC
Ordering
Specify packaging
• Insert packaging code prefix before part number.
E.g., TR1 (or BK1)/MCRS5A
3.18 ± 0.1__ _
7.1 ± 0.5 (0.125 ± 0.004)
(0.280 ± 0.020)
0.81 dia.
(0.032)
"A"
3.18 ± 0.1 diameter
(0.125 ± 0.004)
0.81 diameter
(0.032)
Construction
Dimensions - mm (in)
End View
* AC Interrupting Rating (Measured at designated voltage, 100%) DC Interrupting Rating (Measured at
designated voltage, rise time of less than 50 microseconds, battery source)
** DC Cold Resistance (Measured at 10% of rated current)
† Typical Melting I2t (Measured with a battery bank at rated DC voltage, 10x-rated current, rise time of
calibrated circuit less than 50 microseconds)
‡ Typical Voltage Drop (Measured at rated current after temperature stabilizes)
Electrical Characteristics
% of Amp Rating Opening Time
100% 4 hours minimum
200% 30 seconds maximum
Specifications
Voltage Interrupting Resistance Typical Typical
Part Number Rating Rating* (amps) (ΩΩ)** Melt Voltage
Vac/dc Vac Vdc Typical I2t† Drop‡
MCRS250mA 125 50 300 3.20 0.042 2.20
MCRS300mA 125 50 300 2.57 0.056 2.02
MCRS375mA 125 50 300 1.66 0.101 1.69
MCRS500mA 125 50 300 1.07 0.18 1.42
MCRS750mA 125 50 300 0.55 0.44 1.09
MCRS1A 125 50 300 0.36 0.78 0.91
MCRS1.25A 125 50 300 0.23 1.41 0.77
MCRS1.5A 125 50 300 0.18 1.9 0.7
MCRS2A 125 50 300 0.12 3.4 0.59
MCRS2.5A 125 50 300 0.08 6.1 0.5
MCRS3A 125 50 300 0.06 8.1 0.45
MCRS4A 125 50 300 0.04 15 0.38
MCRS5A 125 50 300 0.02 35 0.29
MCRS7A 125 50 300 0.01 63 0.25
Packaging Code “A” Length
BK1 1.5"
TR1 1.13"
Subminiature Microtron®Fuses
MCRS Series, Time-Delay, Wire-in-Air
HALOGEN
HF
FREE
0709 BU-SB09025 Page 1 of 2 Data Sheet 4075
Time-Current Curve
Packaging Code
Packaging Code Prefix Description
BK1 1,000 fuses in bulk
TR1 2,500 fuses on tape-and-reel per EIA-296-F @ 5 mm pitch and 52.4mm inside tape spacing
Time in Seconds
Current in Amps
© 2009 Cooper Bussmann
St. Louis, MO 63178
www.cooperbussmann.com
0709 BU-SB09025 Page 2 of 2 Data Sheet 4075
The only controlled copy of this Data Sheet is the electronic read-only version located on the Cooper Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is
intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Cooper Bussmann reserves the right, without notice, to change
design or construction of any products and to discontinue or limit distribution of any products. Cooper Bussmann also reserves the right to change or update, without notice, any technical information contained
in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
Life Support Policy: Cooper Bussmann does not authorize the use of any of its products for use in life support devices or systems without the express written approval of an officer of the Company. Life support
systems are devices which support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in
significant injury to the user.
