THERMAL SENSORS / CIRCUIT PROTECTORS
CIRCUIT PROTECTORS
TECHNOLOGY OF TOMORROW
FUSIBLE FLAT CHIP
RESISTORS
RF73
STRUCTURE
1 Ceramic substrate
2 Top termination
3 Bottom termination
4 Fusible resistive film
5 Protective layer
6 End termination (Ni Cr)
7 Diffusion barrier (Ni)
8 Solder plating
IDENTIFICATION
PRODUCT CODE COATING COLOR
MARKING
Products with Pb-free terminations
meet RoHS requirements
RF73 Brown
Black, 3 digits
TYPE DESIGNATION (HOW TO ORDER)
Old Part No.
RF73B
2A
J
TD
TD
22R
New Part No.
(Pb-free)
2A
RF73
T
220
J
TAPING*
STYLE
TERMINATION
NOMINAL
RESISTANCE
3 digits
RESISTANCE
TOLERANCE
J: 5ꢀ
PRODUCT CODE
TOLERANCE
TD, TE, BK
1J…3A
SURFACE MATERIAL
T: Sn
L: Sn/b
*Please see “PACKAGING”
FEATURES
DIMENSIONS (mm)
■ Small and light with the same configuration as a flat chip resistor (RK73 series)
■ Works as a resistor in normal operation
TYPE
L
0.2
W
C
d
t
0.1
0.5
RF73 1J
RF73 2A
RF73 2B
RF73 2E
RF73 2H
RF73 3A
1.6
0.8 0.1 0.3 0.1 0.3 0.1
1.25 0.1 0.4 0.2 0.3
1.6 0.2
2.6 0.2
2.5 0.2
3.1 0.2
■ Fuses quickly and protects circuits when excessive voltage is applied
■ Anti-Leaching nickel barrier terminations
■ Fusing time: max. 60 sec.
■ Recognized by safety standard UL1412 (2A/0805…3A/2512) (1J/0603 is not recognized)
■ Meets or exceeds IEC 60115-8, JIS C 5201-8, EIAJ RC-2124
■ Rated ambient temperature: + 70° C
■ Operating temperature range: - 55° C ... + 125° C
■ Suitable for reflow and wave soldering
+0.2
2.0
3.2
-0.1
+
–
0.2
0.4
0.4
0.1
0.5 0.3
0.6
5.0
6.3
+
–
0.2
0.1
(0.65 0.15)*
* Time of change to (0.65 0.15) will be announced by PCN.
ONE PULSE LIMITING ELECTRIC POWER
100
EXAMPLE OF FUSING CHARACTERISTICS
10
10
1
3A
2H
2E
3A
2B
1J, 2A
1J
2H
2A
2B
2E
001
0.1
1
10
100
0
1
2
3
4
5
6
7
8
Pulse duration (ms)
Fusing Power (W)
RATING
RESISTANCE
RANGE
POWER
FUSING CHARACTERISTICS
(FUSING POWER)
SIZE
TYPE
T.C.R.
RATING*
0.063 W
0.1 W
(E24)
1Ω … 100Ω
J( 5ꢀ)
2.6 W
2.4 W
1.1Ω … 20Ω
2.1 W
22Ω … 100Ω
0603
0805
1206
1210
2010
2512
RF73 1J
RF73 2A
RF73 2B
RF73 2E
RF73 2H
RF73 3A
see below*
–
–
1 Ω
3.0 W
2.6 W
2.4 W
2.1 W
22 Ω…100 Ω
2.0 W
110 Ω…510 Ω
1.75 W
110 Ω…510 Ω
3.0 W
110 Ω…510 Ω
3.2 W
110 Ω…510 Ω
+1000…
–500 ppm/K
(0.2Ω…4.3Ω)
0.2 Ω…0.47 Ω 0.51 Ω…1.0 Ω 1.1 Ω…20 Ω
3.75 W
0.2 Ω…0.47 Ω 0.51 Ω…10 Ω
4.5 W 4.1 W
2.875 W
2.5 W
2.0 W
0.125 W
0.2 Ω
…
510 Ω
11 Ω…24 Ω
27 Ω…100 Ω
3.5 W
3.2 W
30 Ω…100 Ω
0.25 W
0.5 W
1.0 W
0.2 Ω…0.47 Ω 0.51 Ω…4.7 Ω 5.1 Ω…27 Ω
500 ppm/K
(4.7Ω…510Ω)
5.5 W
0.2 Ω…0.47 Ω 0.51 Ω…4.7 Ω 5.1 Ω…27 Ω
6.5 W 6.0 W 5.0 W
0.2 Ω…0.47 Ω 0.51 Ω…4.7 Ω 5.1 Ω…30 Ω
5.0 W
4.0 W
3.5 W
J ( 5ꢀ)
30 Ω…100 Ω
4.5 W
33 Ω…100 Ω
4.0 W
110 Ω…510 Ω
*For resistors operated at an ambient temperature of +70°C or above, the power rating shall be derated.
*T.C.R. +1000 … -500ppm/K (1Ω … 3.3Ω), T.C.R. 500ppm/K (3.6Ω … 100Ω)
EUROPE GmbH • Kaddenbusch 6 • D-25578 Dägeling / ITZEHOE • PHONE: +49 (0) 48 21/89 89-0 • FAX: +49 (0) 48 21/89 89 89 • Internet: www.koaeurope.de
Revision: 5. Nov. 2004