EMC2-4R7K Welwyn Components, EMC2-4R7K Datasheet - Page 3

• Manufacturer Part Number: EMC2-4R7K
• Description: Metal Film Resistors - Through Hole 2W 4.7 ohm 10%
• Manufacturer: Welwyn Components
• Series: EMCr
• Type: Pulse Withstanding Fusible Flameproof Metal Film Resistorsr

Specifications of EMC2-4R7K

• Resistance: 4.7 Ohms
• Power Rating: 2 Watts
• Temperature Coefficient: +/- 100 PPM / C
• Tolerance: 10 %
• Termination Style: Axial
• Operating Temperature Range: - 55 C to + 155 C
• Dimensions: 4 mm Dia. x 10 mm L
• Product: Metal Film Resistors Flameproof
• Resistance Tolerance: 10%
• Voltage Rating: 500V
• Resistor Element Material: Metal Film
• Resistor Case Style: Axial Leaded
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Packaging
radial pre-formed leads, or in blister tape with Z-formed leads for SMD mounting. Consult factory for details.
Application Notes
1. If the resistors are to dissipate full rated power, it is recommended that the terminations should not be soldered
closer than 4mm from the body.
2. Due to operating temperature limits imposed by some PCB materials, derating may be necessary. An estimate of
the temperature rise to be expected can be calculated using the thermal impedance figures given under Electrical
Data.
3. To protect against fire under all conditions of overload, a positive clearance of at least 13mm should be provided
between the body of the resistor and any combustible materials.
3. EMC resistors can also be supplied loose packed with radial, goalpost or lancet pre-formed leads, tape packed with
Packaging
Our standard packaging for EMC is taped and boxed. The critical dimensions are shown in Figure 1. The component
wires will not protrude beyond the outside edge of the tapes. Alternative packaging is available by request.
Standard Quantities per Package
Type
Ammo pack
Ordering Procedure
Specify type reference, value and tolerance as shown in this example of EMC2 at 33Ω, 20%:
Type
Value (use IEC62 code)
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own test data and is considered accurate at time of print.
Welwyn Components Limited
Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: [phone] Fax: [phone] Web: www.welwyn-tt.com
Issue I 03/07/03 SJO
Tolerance (use IEC 62 code)
K
M
I Ammo
mm
10%
20%
C
B
EMC2 2000/box Standard
EMC2
68
5
EMC2
2000
EMC2 -
33R
Figure 1
6
M
Body location f1-f2 < 1.4mm
f1
I
b
A subsidiary of TT electronics plc
f2
6
c
01. 11