0437.250 Fuses - <b>437 Series - 1206 Size Lead-Free, Halogen Fee, High Temperature Very Fast-Acting Ceramic Fuse</b>

Part Number: 0437.250

Series: 437

Littelfuse Fuse 437 Series Data Sheet
Littelfuse_Fuse_437.pdf
(516,498 bytes)
Last Uploaded: June 27, 2011

437 Series - 1206 Size Lead-Free, Halogen Fee, High Temperature Very Fast-Acting Ceramic Fuse

This 100% Lead Free and RoHS compliant fuse series has been designed specifically to provide over current protection to circuits that see high working ambient temperatures (up to 150ºC).

The general design ensures excellent temperature stability and performance reliability.

In addition to this, the high i²t values typical of the Littelfuse Ceramic fuse family ensure high inrush current withstand capability.

Features

Operating Temperature -55°Cto +150°C

100% Lead-Free and RoHS compliant

Suitable for both leaded and lead-free reflow / wave soldering

Applications

Automotive Electronics

LCD Displays•Servers

Printers•Scanners

Data Modems

Help	Property	Value
It is established by Littelfuse as a value of current which the fuse, fuseholder, fuse clip or other fuse accessory can carry, based on a controlled set of test conditions. Close Info	Ampere Rating (A)	0.25
The maximum rms AC voltage and/or the maximum DC voltage at which the fuse is designed to operate. For example, fuses rated at 600 volts and below may be applied at any voltage less than their rating. There is no rule for applying AC fuses in DC circuits such as applying the fuse at half its AC voltage rating. Fuses used on DC circuits must have DC ratings. Close Info	VAC (V)	125
The maximum RMS AC voltage and/or the maximum DC voltage at which the fuse is designed to operate. For example, fuses rated at 600 volts and below may be applied at any voltage less than their rating. There is no rule for applying AC fuses in DC circuits such as applying the fuse at half its AC voltage rating. Fuses used on DC circuits must have DC ratings. Close Info	VDC (V)	125
Refers to how rapidly the fuse responds to various current overloads. Fuse characteristics can be classified into three general categories: very fast-acting, fast-acting or Slo-Blo® (time delay)fuse. The distinguishing feature of Slo-Blo fuses is that these fuses have additional thermal inertia (surge withstand) designed to tolerate normal initial or start-up overload pulse. Close Info	Opening	Fast-Acting (F)
Package Size/Form Factor Close Info	Package Size	1206 (3216)
RMS Surge (Non-repetitive) On-state Fusing Current- Measure of let-through energy in terms of current and time for fusing purposes. Close Info	Nominal Melting I²T (A²sec)	0.003
Cold resistance is the resistance obtained using a measuring current of no more than 10% of the fuse's nominal rated current. The factory should be consulted if this parameter is critical to the design in question. Close Info	Nominal Cold Resistance (Ohms)	2.29
Close Info	Interrupt Rating	50A@125VDC
Close Info	Interrupt Rating	50A@125VAC
Nominal Power Dissipation (W) Close Info	Nominal Power Dissipation (W)	0.195
Nominal Voltage Drop (mV) Close Info	Nominal Voltage Drop (mV)	0.78
Operating Temperature (deg C) Close Info	Operating Temperature (deg C)	-55�C - + 150�C
Moisture Sensitivity Level Close Info	Moisture Sensitivity Level	IPC/JEDEC J-STD-020C LEVEL 1
Color or Alpha-Numeric code used to define the amp rating of the device for ease-of-maintenance and quality checks. Close Info	Marking Code	D
The part of a fuse enclosing the fuse elements and supporting the contacts. Body is also referred to as cartridge, tube, or case. Close Info	Body	Ceramic Body

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Design Support

Certification

Environmental Data

Environmental Info

RoHS Date: 2008-06-06 00:00:00
ICP Test Reports
ICPTest 437.pdf
China RoHS Reports
ChinaRoHS 437.pdf

	CSA_1422 30-029862 7/27/11 CSA_142230-0298623.pdf (180 K)
	UL_JDYX2.E10480 12/21/11 UL_JDYX2.E10480.pdf (1,541 K)
	UL_JDYX8.E10480 4/29/11 UL_JDYX8.PDF (97 K)

Electrical Characteristics

Design Support

Environmental Data