PolySwitch®
PTC Devices
Overcurrent Protection Device
PRODUCT: ASMD250F
DOCUMENT: SCD26584
REV LETTER: F
REV DATE: JULY 26, 2016
PAGE NO.: 1 OF 2
© 2016 Littelfuse,Inc Littelfuse.com
Specifications are subject to change without notice.
Revised July 26, 2016
Specification Status: Released
Maximum Electrical Ratings
Operating Voltage / Interrupt Current
16V
DC / 40A
12V
DC / 60A
5V
DC / 125A
Marking
Notes:
1. All metal surfaces are tin plated.
2. Devices cannot be wave soldered.
3. Drawing not to scale.
F
G
B
C
E
A
H
D
TABLE I. DI ME NS IONS:
A B C D E F G H
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN
mm: 8.00 9.40 -- 3.00 5.99 6.71 0.56 0.71 0.56 0.71 3.68 3.94 0.66 1.37 0.43
in*: (0.315) (0.370) -- (0.118) (0.236) (0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054) (0.017)
TABLE II. PERFORMANCE RATINGS:
CURRENT RATINGS** TIME TO
TRIP**
RESISTANCE
VALUES
TRIPPED-STATE
POWER
DISSIPATION**
AMPS
AT 0°C
AMPS
AT 20°C
AMPS
AT 60°C
SECONDS AT
25°C, 9.85A
OHMS
AT 25°C
WATTS AT
25°C
HOLD TRIP HOLD TRIP HOLD TRIP MAX MIN MAX* TYP.
2.32 5.89 1.97 5.0 1.32 3.35 30 0.035 0.085 1.2
* Maximum resistance is measured 1 hour after reflow.
** Values specified were determined using PCB’s with 0.120”X2.0 ounce copper traces.
Reference Documents: PS300, PS400
Precedence: This specification takes precedence over documents referenced herein.
Effectivity: Reference documents shall be the issue in effect on the date of invitation for bid.
CAUTION: Operation beyond the rated voltage or current may result in rupture, electrical arcing or flame.
Materials Information
ROHS Compliant ELV Compliant Pb-Free Halogen Free*
* Halogen Free refers to: Br≤900ppm, Cl≤900ppm, Br+Cl≤1500ppm.
HF
PolySwitch®
PTC Devices
Overcurrent Protection Device
PRODUCT: ASMD250F
DOCUMENT: SCD26584
REV LETTER: F
REV DATE: JULY 26, 2016
PAGE NO.: 2 OF 2
© 2016 Littelfuse,Inc Littelfuse.com
Specifications are subject to change without notice.
Revised July 26, 2016
Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their
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operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation.
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not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse
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