Types 5E2, 5E3, 5E4, 5E5, 5E6: Miniature eutectic alloy fusible links for large or very large series applications


Manufactured in a fully automated way, these fire detection fuses are particularly economical for domestic applications in mechanical ventilation, extractor hoods. They are also externally coated with an alloy protecting them from corrosion.

Material: Brass (possible realization in red copper if shorter response times are required).

Surface Protection: Eutectic alloy

ROHS compliance: These fusible links are available in two versions

Non-ROHS compliant, using traditional alloys containing lead and cadmium, for temperatures 68°C (155°F); 72°C (162°F); 96°C (205°F); 103°C (218°F); 120°C (248°F).

– ROHS compliant, using ternary alloys based on bismuth, tin and indium, (the high cost of indium makes these models 2 to 3 times more expensive than the previous ones) for temperatures 60°C (140°F); 72°C (162°F); 79°C (174°F); 109°C (228°F); 117°C (242°F)

Identification: Model, temperature in °C and date of manufacture are printed on each fusible link


– Mechanical resistance at ambient temperature: 100% in production

– Trip temperature under static load: by statistical sampling

– Trip time in temperature rise under load according to ISO 10294-4: by statistical sampling.

– Holding load 1h at 60°C or 90°C: compliant and verified by statistical sampling in production (Test according to ISO 10294-4)

– Triggering under minimum load: compliant and verified by statistical sampling in production (Test according to UL33)

Salt spray resistance: According to ISO9227-2012, subjected to a mist formed of 20% by weight of sodium chloride in distilled water, at 35°C for 5 days (120h), the apparatuses retain their aptitude for the function, in the response times specified by the standard.



5E2 5E3 5E4 5E5 5E6
Welding surface (mm²) 84 mm² 159 mm² 224 mm² 258 mm²

80 mm²

Permissible maximum permissible load * (DaN)

8.5 DaN 16 DaN 22 DaN 26 DaN 8 DaN
Minimum breaking load 2N 4N 4N 4N


Response time according to ISO 10294-4 under maximum load **

2 min. 43 sec. 2 min 46 sec. 2 min 51sec 2 min 51sec

2min 38 sec

*Maximum permanent load depends on alloy composition and ambient temperature. Values are given for guidance only, and for a 72°C non ROHS eutectic alloy. Alloys with temperatures below 72°C and those that are ROHS compliant, generally have a high proportion of Indium, which greatly reduces the mechanical strength.

** Values measured in our own testing equipment. Testing conditions and equipment comply with ISO10294-4 and ISO DIS 21925-1 2017, fig. C1



2D&3D Drawing

Main references (Not ROHS) 

Model Temperature Reference
5E2 68°C (155°F) 5E2068H050000000
5E2 72°C (162°F) 5E2072H050000000
5E2 96°C (205°F) 5E2096H050000000
5E2 103°C (218°F) 5E2103H050000000
5E2 120°C (248°F) 5E2120H050000000
5E3 68°C (155°F) 5E3068H050000000
5E3 72°C (162°F) 5E3072H050000000
5E3 96°C (205°F) 5E3096H050000000
5E3 103°C (218°F) 5E3103H050000000
5E3 120°C (248°F) 5E3120H050000000
5E4 68°C (155°F) 5E4068H050000000
5E4 72°C (162°F) 5E4072H050000000
5E4 96°C (205°F) 5E4096H050000000
5E4 103°C (218°F) 5E4103H050000000
5E4 120°C (248°F) 5E4120H050000000
5E5 68°C (155°F) 5E5068H050000000
5E5 72°C (162°F) 5E5072H050000000
5E5 96°C (205°F) 5E5096H050000000
5E5 103°C (218°F) 5E5103H050000000
5E5 120°C (248°F) 5E5120H050000000
5E6 68°C (155°F) 5E6068H050000000
5E6 72°C (162°F) 5E6072H050000000
5E6 96°C (205°F) 5E6096H050000000
5E6 103°C (218°F) 5E6103H050000000
5E6 120°C (248°F) 5E6120H050000000


Main references (ROHS compliant)

Model Temperature Reference
5E2 60°C (140°F) 5E2060H050R00000
5E2 72°C (162°F) 5E2072H050R00000
5E2 79°C (174°F) 5E2079H050R00000
5E2 109°C (228°F) 5E2109H050R00000
5E2 117°C (242°F) 5E2117H050R00000
5E3 60°C (140°F) 5E3060H050R00000
5E3 72°C (162°F) 5E3072H050R00000
5E3 79°C (174°F) 5E3079H050R00000
5E3 109°C (228°F) 5E3109H050R00000
5E3 117°C (242°F) 5E3117H050R00000
5E4 60°C (140°F) 5E4060H050R00000
5E4 72°C (162°F) 5E4072H050R00000
5E4 79°C (174°F) 5E4079H050R00000
5E4 109°C (228°F) 5E4109H050R00000
5E4 117°C (242°F) 5E4117H050R00000
5E5 60°C (140°F) 5E5060H050R00000
5E5 72°C (162°F) 5E5072H050R00000
5E5 79°C (174°F) 5E5079H050R00000
5E5 109°C (228°F) 5E5109H050R00000
5E5 117°C (242°F) 5E5117H050R00000
5E6 60°C (140°F) 5E6060H050R00000
5E6 72°C (162°F) 5E6072H050R00000
5E6 79°C (174°F) 5E6079H050R00000
5E6 109°C (228°F) 5E6109H050R00000
5E6 117°C (242°F) 5E6117H050R00000

: for the same models in red copper, replace the 8th character of the reference (0) by C.