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Slow Blow SMD 1808 T 2A 125V Surface Mount Fuses UL cUL ROHS REACH CQC

UL cUL ROHS REACH CQC Certificated Slow Blow SMD 1808 T 2A 125V Surface Mount Fuses

What are the similarities and differences between a disposable fuse and a resettable fuse?

A restorable fuse is essentially a PTC thermistor. It is totally different from a fuse because of its operating principle: it protects a circuit as the resistance of the PTC material is positively correlated to temperature and jump at Curie point.

For the similarities: they both can be used for circuits for overcurrent protection and applied to a number of similar fields and circumstances. Both can be used or replaced in some circumstances. For example, both products are outstanding for battery protection applications where overcurrent protection requirement is not so strict. For protection of certain ICs and important components or at power input/output ends, only the disposable fuse may be competent. The impedance requirement is also higher for these parts. However, the PTC thermistor will be the best choice for the circumstances when products should avoid being damaged from overheat or overcurrent protection at interfaces where hot-swapping is frequent. Yet in most circumstances, the two products are greatly different or cannot replace one another. The following table shows the primary differences between the two.

Owing to the similarities and differences, the two products are available in the market for different purposes.

	One Time fuse	Resettable PTC fuse
Internal resistance	Small	Large
Current sensitivity	High	Low
Response time	Fast	Low
Ageing rate	Slow	Fast
Leakage current	None	Yes
Safety performance	Strong	Weak
Application scope	Wide	Narrow

Certification

Agency	Ampere Range	Agency File Number
UL	50mA ~ 15A	E340427(JDYX2)
CUL	50mA ~ 15A	E340427(JDYX8)
CQC	500mA/1A/2A	CQC18012206754
ROHS	50mA ~ 15A	SZC18111684512
REACH	50mA ~ 15A	SZC18030584513-3

Melting Features

% of Ampere Rating(In)	Blowing Time
100% * In	4 hours Min
200% * In	120 sec Max
1000% * In	10ms Min

Specification

Catalog	Ampere	Voltage	Breaking	Nominal Cold	I2TMelting
No.	Rating	Rating	Capacity	Resistance(Ohms)	Integral(A2.S)
STE0250	250mA	125VAC	50A@300VAC 50A@250VAC 200A@125VAC	0.86	0.145
STE0300	300mA			0.62	0.162
STE0315	315mA			0.55	0.189
STE0375	375mA			0.47	0.2
STE0400	400mA			0.38	0.238
STE0500	500mA			0.32	0.275
STE0600	600mA			0.285	0.47
STE0630	630mA			0.256	0.566
STE0700	700mA			0.208	0.805
STE0750	750mA			0.175	1.24
STE0800	800mA			0.155	1.88
STE1100	1A			0.148	3.5
STE1125	1.25A			0.102	4.76
STE1150	1.5A			0.085	6.305
STE1200	2A			0.044	8.95
STE1250	2.5A			0.043	16.025
STE1300	3A			0.033	21.56
STE1315	3.15A			0.029	22.75
STE1350	3.5A			0.027	27.05
STE1400	4A			0.025	31.808
STE1500	5A			0.019	40.25
STE1600	6A			0.018	67.245
STE1630	6.3A			0.017	73.55
STE1700	7A			0.016	76.28
STE1800	8A			0.015	80.75
STE2100	10A			0.014	110.38
STE2120	12A			0.013	158.08
STE2150	15A			0.012	160.68

Dimension (mm)

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Categories	Glass Fuses
Model Number:	STE1200
Certification:	CQC,UL,CUL,ROHS,REACH
MOQ:	1000PCS
Price:	0.028~0.3USD/PC
Payment Terms:	T/T, Western Union
Supply Ability:	100000000PCS Per Month
Delivery Time:	5-7 Days
Packaging Details:	Tape,30K/Carton
Name:	Surface Mount Fuses
Size:	1808
Rated current:	2A
Rated voltage:	125V
MOQ:	1000PCS
Package:	Tape in reel,1000pcs/reel