BCcomponents
Product specification
Professional MELF resistors
FEATURES
MMU 0102; MMA 0204;
MMB 0207
a helical groove in the resistive layer without damaging the
ceramics. The resistor elements are covered by a protective
coating designed for electrical, mechanical and climatic
protection. The terminations receive a final pure tin on
nickel plating. Four or five colour code rings designate the
resistance value and tolerance in accordance with
IEC 60062.
The result of the determined production is verified by an
extensive testing procedure performed on 100% of the
individual resistors. Only accepted products are laid directly
into the blister tape in accordance with
IEC 60286-3
or bulk
case in accordance with
IEC 60286-6.
The resistors are suitable for processing on automatic SMD
assembly systems. They are suitable for automatic soldering
using wave, reflow or vapour phase. The encapsulation is
resistant to all cleaning solvents commonly used in the
electronics industry, including alcohols, esters and aqueous
solutions.
The resistors are tested in accordance with
CECC 40401-803
which refers to
EN 140000
(IEC
60115-1)
and
EN 140400 (IEC 60115-8).
BCcomponents BEYSCHLAG has achieved
"Approval of
Manufacturer"
in accordance with
EN 100114-1.
The
release certificate for
"Technology Approval Schedule"
in
accordance with
CECC 240001
based on
EN 100114-6
is
granted for the BCcomponents BEYSCHLAG manufacturing
process.
This product family of thin film MELF resistors is completed
by
Zero Ohm Jumpers.
On request, resistors are available with established
reliability in accordance with
CECC 40401-803 Version E.
•
Advanced thin film technology
•
Power dissipation rating up to 1 W
•
Excellent overall stability: Class 0,25
•
Wide professional range: 0,1
Ω
to 10 M
Ω
•
Metric sizes:
– DIN: 0102; 0204; 0207
– CECC: RC 2211M; RC 3715M; RC 6123M
APPLICATIONS
•
Automotive
•
Telecommunication
•
Industrial
•
Medical equipment.
DESCRIPTION
MMU 0102, MMA 0204 and MMB 0207 professional thin
film MELF resistors are the perfect choice for most fields of
modern professional electronics where reliability and
stability is of major concern. The typical applications in the
fields of automotive, telecommunication and medical
equipment reflect the outstanding level of proven
reliability.
Production is strictly controlled and follows an extensive set
of instructions established for reproducibility. A
homogeneous film of metal alloy is deposited on a high
grade ceramic body (85% Al
2
O
3
, for MICRO-MELF:
96% Al
2
O
3
) and conditioned to achieve the desired
temperature coefficient. Nickel plated steel termination
caps are firmly pressed on the metallised rods. A special
laser is used to achieve the target value by smoothly cutting
2001 Jun 08
2
BCcomponents
Product specification
Professional MELF resistors
ORDERING INFORMATION
MMU 0102; MMA 0204;
MMB 0207
Components may be ordered by using either a simple clear text ordering code, see “Type description and ordering code”
or BCcomponents’ unique 12NC.
Numeric Ordering code (12NC)
•
The resistors have a 12-digit ordering code starting with 2312.
•
The subsequent 4 digits indicate the resistor type, specification and packaging; see Table 3.
•
The remaining 4 digits indicate the resistance value:
– The first 3 digits indicate the resistance value.
– The last digit indicates the resistance decade in accordance with Table 4.
Table 2
12NC ordering code indicating resistor type and packaging
DESCRIPTION
B2
2000
units
ORDERING CODE 2312 ... .....
BLISTER TAPE ON REEL
TOL.
BL
3000
units
165 3....
165 2....
165 1....
165 5....
166 1....
166 5....
165 90001
155 3....
155 1....
155 5....
156 1....
156 5....
155 90001
B7
7000
units
B0
10000
units
175 3....
175 2....
175 1....
175 5....
176 1....
176 5....
175 90001
145 3....
145 1....
145 5....
146 1....
146 5....
145 90001
BULK CASE
M3
3000
units
M8
8000
units
060 3....
060 2....
060 1....
060 5....
061 1....
061 5....
060 90001
TYPE
T.C.
±
5%
±
50 ppm/K
MMU 0102
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
040 3....
040 1....
040 5....
041 1....
041 5....
040 90001
±
2%
±
1%
±
0,5%
±
1%
±
0,5%
−
±
5%
±
25 ppm/K
jumper
−
−
−
−
−
−
±
50 ppm/K
±
1%
±
0,5%
MMA 0204
±
25 ppm/K
±
1%
±
0,5%
−
jumper
2001 Jun 08
5
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