Datasheet

Document Number: 28766 For technical questions, contact: [e-mail]
www.vishay.com
Revision: 28-Aug-07 25
MBA/SMA 0204, MBB/SMA 0207, MBE/SMA 0414 - Professional
Professional Leaded Resistors
Vishay Beyschlag
DESCRIPTION
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
) 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 a helical groove in the resistive layer without
damaging the ceramics. Connecting wires of electrolytic
copper plated with 100 % pure tin are welded to the
termination caps. The resistor elements are covered by a
light blue protective coating designed for electrical,
mechanical and climatic protection. 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 stuck
directly on the adhesive tapes in accordance with
IEC 60286-1.
ASSEMBLY
The resistors are suitable for processing on automatic
insertion equipment and cutting and bending machines.
Excellent solderability is proven, even after extended
storage. They are suitable for automatic soldering using
wave or dipping. The encapsulation is resistant to all
cleaning solvents commonly used in the electronics industry,
including alcohols, esters and aqueous solutions. The
suitability of conformal coatings, if applied, shall be qualified
by appropriate means to ensure the long-term stability of the
whole system. The resistors are completely lead (Pb)-free,
the pure tin plating provides compatibility with lead (Pb)-free
and lead-containing soldering processes. The immunity of
the plating against tin whisker growth has been proven under
extensive testing. All products comply with the
CEFIC-EECA-EICTA list of legal restrictions on hazardous
substances. This includes full compliance with the following
directives:
• 2000/53/EC End of Vehicle Life Directive (ELV)
•
2000/53/EC Annex II to End of Vehicle Life Directive (ELV II)
• 2002/95/EC Restriction of the use of Hazardous
Substances Directive (RoHS)
• 2002/96/EC Waste Electrical and Electrical Equipment
Directive (WEEE)
APPROVALS
The resistors are tested in accordance with CECC
40101-806 which refers to EN 60115-1 and EN 140100.
Approval of conformity is indicated by the CECC logo on the
package label.
Vishay BEYSCHLAG has achieved "Approval of
Manufacturer" in accordance with EN 100114-1.
SPECIALS
This product family of leaded thin film resistors for
professional applications is complemented by Zero Ohm
Jumpers and isolators.
On request, resistors are available with established reliability
in accordance with CECC 40101-806 Version E. Please
refer to the special data sheet for information on failure rate
level, available resistance ranges and ordering codes.