1E
1J
2A
2B
2E
2H
3A
features
•Same quality thick film construction as type RM
•Glass passivated, supplied without protective coat
•Anti-leaching nickel barrier terminations
•Trimmable in circuit 2x original value
•Replaces trimmer in critical circuit adjustments
•Marking: Black body with no marking
•Products with lead-free terminations meet
RoHS requirements. Pb located in glass material,
electrode and resistor element is exempt per Annex 1,
exemption 5 of EU directive 2005/95/EC
18
KOA Speer Electronics, Inc. • Bolivar Drive • P.O. Box 547 • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 1/26/07
RK73N
trimmable chip resistor
dimensions and construction
Protective
Coating
Lc
W
t
dInner
Electrode
Solder
Plating
Ni
Plating
Resistive
Film
Ceramic
Substrate
c
ordering information
N: 0 ~ -20%
P: 0 ~ -30%
W: ±10%
M: ±20%
T: Sn
L: SnPb
(Other termination
styles may be
available, please
contact factory
for options)
2 significant
figures + 1
multiplier
TP: 2mm pitch punched paper
(0402, 0603 & 0805)
TD: 7" paper tape
(0603, 0805, 1206 &1210)
TDD: 10" paper tape
(0603, 0805, 1206 &1210)
TE: 7" punched plastic
(0805, 1206, 1210,
2010 & 2512)
TED: 10" punched plastic
(0805, 1206, 1210,
2010 & 2512)
RK73N
Type Size Nominal
Resistance Tolerance
Termination
Material Packaging
New Part # 2B TD 102 WT
For further information
on packaging, please refer
to Appendix A.
Type
L
.039 +.004
-.002
(1.0 +0.1 )
-0.05
.01 +.002
-.004
(0.25 +0.05)
-0.1
.012 +.008
-.004
(0.3 +0.2 )
-0.1
.016 +.008
-.004
(0.4 +0.2 )
-0.1
.013±.002
(0.33±0.05)
.018±.004
(0.45±0.1)
.012±.004
(0.3±0.1)
.02±.004
(0.5±0.1)
.024±.004
(0.6±0.1)
.008±.004
(0.2±0.1)
.012±.004
(0.3±0.1)
.016±.008
(0.4±0.2)
.02±.012
(0.5±0.3)
.063±.008
(1.6±0.2)
.102±.008
(2.6±0.2)
.098±.008
(2.5±0.2)
.122±.008
(3.1±0.2)
.126±.008
(3.2±0.2)
.049±.004
(1.25±0.1)
.031±.004
(0.8±0.1)
.02±.002
(0.5±0.05)
.063±.008
(1.6±0.2)
.079±.008
(2.0±0.2)
.197±.008
(5.0±0.2)
.248±.008
(6.3±0.2)
1E
(0402)
1J
(0603)
2A
(0805)
2B
(1206)
2H
(2010)
3A
(2512)
(Inch Size Code) Wc d t
Dimensions inches (mm)
2E
(1210)
resistors
.025±.005
(0.65±0.15)
1570 Reader's Spreads pg1-188 3/26/07 2:26 PM Page 16
RK73N
trimmable chip resistor
Absolute
Maximum
Working
Voltage
Resistance
Tolerance
Resistance
Range
E-12**
Part
Designation*
Absolute
Maximum
Overload
Voltage
Operating
Temperature
Range
Power
Rating
@ 70°C
T.C.R.
(ppm/°C)
Max.
applications and ratings
RK73N1E
(0402)
RK73N1J
(0603)
RK73N2A
(0805)
RK73N2B
(1206)
RK73N2E
(1210)
RK73N2H
(2010)
RK73N3A
(2512)
1/16W (.063W)
1/10W (.10W)
1/8W (.125W)
1/4W (.25W)
1/3W (.33W)
3/4W (.75W)
1W
±200
N: 0 ~ -20%
P: 0 ~ -30%
W: ±10%
M: ±20%
10Ω- 1MΩ
100V
200V
50V 100V
200V
400V
-55°C to +125°C
Derating Curve
environmental applications
% Rated Power
100
80
60
40
20
-60 -40 -20 0 40 60 80 100 140
70
20
Ambient Temperature
(°C)
0
-55
120
125
19
KOA Speer Electronics, Inc. • Bolivar Drive • P.O. Box 547 • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 1/26/07
For complete environmental specifications,
please refer to pages 30-31.
The Trimmable chip resistor is suitable for the circuit demanding high
stability as a replacement of variable resistors for adjusting circuit.
Please note that customers need laser trimming equipment.
Trimming by laser increases the initial resistance. Amount of resistance
increase is dependent on the laser cut configuration as shown.
W1must not exceed 1/2W to ensure power rating of the unit.
* Parenthesis indicate EIA package size codes.
** See Appendix D for available decade values.
Resistance Rising Rate
W
1
Δ R/R Magnification
2
1.5
0.5 1
W
1
/W (W
1
= Total Trimmed Length)
10
Initial resistance increase of magnification
Single cut
L cut
Double
reverse cut
Double cut
W
resistors
1570 Reader's Spreads pg1-188 3/26/07 2:26 PM Page 17
