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Type 5EQ, 5EW, 5EK,5EO
Type 5EQ, 5EW, 5EK,5EO
Type 5EQ, 5EW, 5EK,5EO
Fast triggering eutectic alloy fusible links, in copper or brass
Controls and Safety
Fire and Damper Mechanisms
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Product applicable fields
  • Industry
  • Ventilation
  • Professionnal kitchen
  • Fire Systems
product presentation

Made of thin metal, these fusible links have the shortest response time, between 2 minutes 50 seconds and 3 minutes, for a temperature rise rate of 20°C/min from 25°C, but the fineness of the metal limits their mechanical strength.

Material: Brass (red copper possible on request).

Surface Protection: No special surface protection

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 non-Rohs types) 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 stamped on each fusible link

Tests:
- 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 ISO 9227-2012, subjected to a mist formed of 20% by weight of sodium chloride in distilled water, at 35°C for 5 days (120h), the fusible links retain their aptitude for the function, in the response times specified by the standard.

Type 5EQ 5EW 5EK 5EO
(Improved mechanical breaking load model)
Welding surface (mm²) 175 mm² 230 mm²  225mm²  205mm²
Maximum permissible permanent
load (DaN)		 18 DaN theoretical * but limited
to 9 DaN because of the low
mechanical breaking load at
25°C **		 23 DaN theoretical * but limited
to 9 DaN because of the low
mechanical breaking load at
25°C **		 23 DaN theoretical * but limited
to 9 DaN because of the low
mechanical breaking load at
25°C **		 20 DaN theoretical but
limited to 16 DaN because of
the low mechanical breaking
load at 25°C *
Minimum triggering load  4N  4N 4N  4N 
Mechanical breaking load at 25°C for brass fusible links 27 DaN  28 DaN  28 DaN  48 DaN 
Mechanical breaking load at 25°C for copper fusible links  26 DaN 27 DaN 26 DaN 46 DaN
Response time according to ISO 10294-4 under maximum load ***  2 min. 55 sec.  2 min. 58 sec.  2 min. 53 sec.  2 min. 53 sec

* Maximum permanent load depends on alloy composition and ambient temperature on 72°C fusible links. 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.
** The maximum permanent load is limited to 1/3 of the mechanical breaking load at 25°C
*** Values measured in our own testing equipment. Testing conditions and equipment comply with ISO10294-4 and ISO DIS 21925-1 2017, fig. C1