PolySwitch®
PTC Devices
Overcurrent Protection Device
PRODUCT: AHRF450
DOCUMENT: SCD25183
REV LETTER: E
REV DATE: JULY 26,2016
PAGE NO.: 1 OF 2
Specification Status: Released
Electrical Rating
Voltage:
16V
DC
MAX
Insulating Material:
Cured, Flame Retardant Epoxy Polymer
Lead Material:
20 AWG Tin Plated Copper
(
0.8 mm [0.032] nom. diameter)
Part Marking:
Manufacturer’s Mark
H4.5
and Part Identification
Lot Identification
TABLE I. INSTALLATION ENVELOPE DIMENSIONS:
A
B
MIN
4.3
(0.17)
C
MAX
5.8
(0.23)
MIN
7.6
(0.30)
D
MAX
--
--
MIN
--
--
E
MAX
3.0
(0.12)
MIN
MAX
MIN
MAX
mm:
--
10.4
--
15.6
in*:
--
(0.41)
--
(0.61)
*Rounded off approximation
CURRENT
RATINGS
AMPS
AT 25°C
HOLD
TRIP
4.5
8.7
Reference Documents:
Precedence:
Effectivity:
CAUTION:
TIME TO
TRIP
SECONDS AT 25°C,
22.5 A
MAX
4.0
F
TYP
1.2
(0.05)
G
MIN
--
--
MAX
3.94
(0.16)
TABLE II. PERFORMANCE RATINGS:
RESISTANCE
R
a MAX
OHMS
AT 25°C
0.054
TRIPPED-STATE
POWER
DISSIPATION
WATTS AT
25°C
TYP
3.6
OHMS
AT 25°C
MIN
MAX
0.017
.036
PS400, PS300 (reference for R
1 MAX
)
This specification takes precedence over documents referenced herein.
Reference documents shall be the issue in effect on the date of invitation for bid.
Operation beyond the rated voltage or current may result in rupture, electrical arcing or flame.
ELV Compliant
Pb-Free
Halogen Free*
Materials Information
ROHS Compliant
HF
* Halogen Free refers to: Br≤900ppm, Cl≤900ppm, Br+Cl≤1500ppm.
© 2016 Littelfuse,Inc
Specifications are subject to change without notice.
Revised July 26, 2016
littelfuse.com
PolySwitch®
PTC Devices
Overcurrent Protection Device
PRODUCT: AHRF450
DOCUMENT: SCD25183
REV LETTER: E
REV DATE: JULY 26,2016
PAGE NO.: 2 OF 2
TABLE III. AUTOMOTIVE SPECIFIC STRESS TESTS AND TEST CONDITIONS:
ELECTRICAL STRESS TESTS
ESD Voltage Withstand
(see note 1)
Short Circuit Fault Current Durability
TEST CONDITIONS (see note 2)
25kV
25 cycles, 16V, 200A
Fault Current Durability
End-of-life Mode Verification
Jump Start Endurance
(see note 1)
Load Dump Endurance
(see note 1)
350 cycles, 16V/100A
1750 cycles, 16V/100A
3 cycles, 26V, 1 minute duration
10 cycles, 86.5V
Note 1: The PolySwitch devices are tested in series with a load resistance and the voltages specified in the test conditions
are shared between the PolySwitch device and the load resistance as specified in PS400.
Note 2: Please refer to Appendix A of PS400 for the detailed test procedures
Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their
own applications. Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, military, aerospace, medical, lifesaving,
life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired
operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation.
Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall
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
documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse.
© 2016 Littelfuse,Inc
Specifications are subject to change without notice.
Revised July 26, 2016
littelfuse.com
Microcontroller MCU
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