JOB E-BULB User manual
MANUAL & SAFETY
INSTRUCTIONS
E-BULB
EXTINGUISHING BULB
JOB GmbH – E-Bulb
E-Bulb – Safety and Handling Instructions Page 1/4
E-Bulb Safety and Handling Instructions
1) Description
JOB’s E-Bulb (Extinguishing Bulb) is a glass bulb (as typically being used in sprinkler
applications) filled with a non-conductive, non-toxic extinguishing agent. The glass bulb is
coated with conductive, non-corrosive, layers of metals and can carry an electrical current.
When the glass bulb bursts at a defined temperature (e.g. through fire on a PCB), the
extinguishing liquid will be released from the inside of the bulb. Transition-phase-free, the
liquid immediately converts into a gas. Resulting in cooling and partly by displacing oxygen, a
starting local fire will be extinguished within seconds. As the bulb bursts into very small
pieces when activated, the current flow over the bulb is permanently interrupted
(interrupting power to the circuits behind the E-Bulb, thus preventing a fire from electrically
re-igniting).
Picture 1: E-Bulb in SMD fuse holder
2) General Safety Instructions
At normal ambient conditions, E-Bulb is not pressurized.
It is, however, recommended to wear safety glasses when handling E-Bulb to
prevent, in case of an unlikely but possible bursting of the glass bulb, damage to
the eyes by scattered glass.
E-Bulb is a glass product and should be handled with care. It must not be dropped
or stacked. E-Bulb can be gently pressed into a fuse holder without danger of
damaging the bulb. It has to be placed in a way that the metal layers are in full
contact with the fuse holder clamping/holding sections.
If exceeding 40°C / 104°F ambient temperature, E-Bulb becomes pressurized
requiring specific care and personal safety devices (like glasses/gloves etc.) to
prevent possible injuries in case the glass bulb bursts.
JOB GmbH – E-Bulb
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It is recommended to let the E-Bulb cool down to standard ambient temperature (below
40°C/104°F) before handling.
3) Assembly and installation
The E-Bulb should only be used in fuse holders recommended by JOB.
JOB recommends using UL certified fuse holders made by SCHURTER, Switzerland (type OGN,
UL listing IZLT2.E39328 and IZLT8.E39328).
E-Bulb can be assembled into a fuse holder by gently pressing the bulb into the brackets of
the holder. It has to make sure that the conductive stripes on the bulb are in full contact with
the holder brackets to allow the transition of the maximum rated current.
4) Storage
E-Bulb should be stored in the packaging it came with from the manufacturer. The maximum
permanent storage temperatures must not exceed 40°C/104°F. Maximum permanent
storage humidity is 85% (non-condensing).
5) Operation and maintenance
E-Bulb dos not require maintenance, regular checking or control. Standard lifetime is usually
15 years+ after production.
The rated maximum current must not be exceeded during operation to prevent over-heating
and unintended activation of the E-Bulb.
After the E-Bulb has been initiated, E-Bulb is destroyed and cannot be reused.
For further use of the equipment, a new E-Bulb has to be placed.
E-Bulb is REACH-conform.
The SDS for NOVEC™ applies.
JOB GmbH – E-Bulb
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6) Technical Data
a. Sizes
b. Technical data
Th85°C / 185°F (rated holding temperature*)**
Tf165°C / 330°F (rated functioning temperature*)**
Humidity: 85% during operation and storage
*) The temperatures shown above are standard temperatures only. As per customer
request, other temperatures are possible.
**) for UL conform use of E-Bulb (CIFEA) Thand Tfare 185°F and 330°F respectively
c. Bill of materials
•Glass (bulb): Borosilicate glass
•Metal (conductive layers): Cu, Sn
•Extinguishing liquid: 3MTM NOVEC™ engineered fluid
(The chemical composition is in accordance
with NFPA 2001, FK-5-1-12.
CAS number is 756-13-8.)
JOB GmbH – E-Bulb
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d. approvals and conformities
•VDEtested
•UL (for 5x40 and 10A only)
•MPA effectiveness test
•REACH
7) Dimensions
See footprint plans, drawings and 3D STP files available from the manufacturer for details.
8) Disclaimer
Manufacturer and owner of rights (patents):
JOB GmbH,
An der Strusbek 5,
D-2926 Ahrensburg, Germany
Additional information can be found on www.job-group.com or bycontacting JOB at
sales@job-group.com
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