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KOA SPEER ELECTRONICS, INC.
SS-251 R2
AHA 6/01/06
Linear Positive Tempco Thermistor Type LT73
1. General I Anti-leaching nickel barrier terminations I Twenty-five specifiable temperature characteristics
I I
CERTIFIED
CERTIFIED
SMD thin film resistor with thermo-perceptivity Marking: black four-digit on bronze body color
2. Dimensions
W
c
L
c
Solder Plating Ni Plating
t d Protective Coating Resistive Inner Film Electrode
Table 1 Part
2A (0805) 2B (1206)
Ceramic Substrate
L
0.0790.008 (2.000.20) 0.1260.008 (3.200.20)
Dimensions - inches (mm) c W
0.0490.008 (1.250.20) 0.0630.008 (1.600.20) 0.0160.008 (0.400.20) 0.0200.012 (0.500.30)
d
+.008 -.004 +.20 -.10
t
. ) 0.0200.004 (0.500.10) 0.0240.004 (0.600.10)
0.012 (0.30
0.016 +.008 . -.004 (0.40 +.20 ) -.10
3. Type Designation The type designation shall be in the following form: New Type
LT73
Type
2B
Size
2A: 0805 2B: 1206
T
Termination Material
T: Sn (Other termination styles available, contact factory for options)
TD
Packaging
TD: 7" Paper Taping 5,000 pcs/reel TE: 7" Embossed Plastic 4,000 pcs/reel
101
Resistance Value
2 significant figures + 1 multiplier
J
Tolerance
G: 2% J: 5%
1000
T.C.R.
PAGE 1 OF 4 Bolivar Drive
I
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
I
www.koaspeer.com
Specifications given herein may be changed at any time without pr ior notice. Please confir m technical specifications before you order and/or use.
KOA SPEER ELECTRONICS, INC.
SS-251 R2
4. Standard Applications
Part Designation Power Rating @ 70C Absolute Maximum Working Voltage Absolute Operating Maximum Temp. Overload Range Voltage Resistance Range E-24* LT732A 2K - 24K 1K - 20K 1K - 13K 510 - 4.7K 510 - 4.7K 510 - 3.0K 510 - 3.0K 510 - 3.0K 100 - 1K 51 - 510 LT732B 2K - 51K 1K - 43K 1K - 27K 1K - 10K 510 - 9.1K 510 - 6.2K 510 - 6.2K 510 - 6.2K 100 - 2K 51 - 510 G: 2% Resistance Tolerance T.C.R. (ppm/C) Maximum** T.C.R. Tolerance
LT732A
100mW
50V
100V -40C to +125C
J: 5%
LT732B
125mW
75V
150V
150, 250, 350, 450, 500 100ppm/C 600, 700, 800, 900 150ppm/C 1000, 1200, 1400 15% 1600, 1800 2000, 2200, 2400 2600, 2800 3000, 3300, 3600 10% 3900 4200 4500
* See Appendix D for available decade values. ** T.C.R. is factory tested from 25C to 75C.
5. Environmental Applications 5.1 Derating Curve
100 80 % Rated Power 60 40 20 0 -40
-20
0
80 70 Ambient Temperature (C)
20
40
60
100 120 140 125
5.2 Temperature Characteristics
Resistance Changing Rate (R) 10 8 6
500ppm/C 1000ppm/C
Resistance Changing Rate (R)
60 50 40 30 20 10 0 -10 -20 -30 -50 -25 0 25 50 75 100 125
3300ppm/C 2400ppm/C 1600ppm/C 4500ppm/C
4 2 0 -2 -4 -6 -8 -50 -25 0 25 50 75 100 125
150ppm/C
Ambient Temperature (C)
Ambient Temperature (C)
PAGE 2 OF 4 Bolivar Drive
I
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
I
www.koaspeer.com
Specifications given herein may be changed at any time without pr ior notice. Please confir m technical specifications before you order and/or use.
KOA SPEER ELECTRONICS, INC.
SS-251 R2
6. Approximate Expression for Resistance-Temperature Characteristics
T.C.R. (x10-6/K) 3000 3300 3600 3900 4200 4500 C0 0.934 0.927 0.921 0.915 0.909 0.903 C1 0.00258 0.00282 0.00306 0.00330 0.00353 0.00377 C2 2.77 x 10-6 3.17 x 10-6 3.58 x 10-6 4.00 x 10-6 4.44 x 10-6 4.89 x 10-6
7. Performance Characteristics Parameter
Thermal Shock Low Temperature Operation High Temperature Exposure Short Time Overload Resistance to Solder Heat Terminal Strength-Bend Moisture Resistance Life Temperature Cycling
Maximum R
1.0% 1.0% 1.0% 1.0% 1.0% 1.0% 3.0% 3.0% 1.0%
Test Method
MIL-STD-202, Method 107, -55C to +155C, 5 cycles MIL-R-55342 4.7.4, 1 Hour @ -55C followed by 45 minutes of RCWV* MIL-R-55342 4.7.6, 100 hours @ 125C MIL-R-55342 4.7.5, 2.5 x RCWV for 5 seconds MIL-R-55342 4.7.7, 260C for 10 seconds 2mm min. deflection in either direction for 10 seconds MIL-STD-202, Method 103, 40C, 90 - 95% RH, 1000 hours MIL-STD-202, Method 108, 70C, 1000 hours @ RCWV, 1.5 hr ON, 0.5 hr OFF 30 minutes @ -55C, 15 minutes @ +25C, 30 minutes @ +125C, 15 minutes @ +25C, 5 cycles
* RCWV = Rated Continuous Working Voltage
PAGE 3 OF 4 Bolivar Drive
I
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
I
www.koaspeer.com
Specifications given herein may be changed at any time without pr ior notice. Please confir m technical specifications before you order and/or use.
KOA SPEER ELECTRONICS, INC.
SS-251 R2
8. Dimensions 8.1 Carrier Tape
A DC B 1.5 +0.1 -0 E
T2
K T1 F
Tape 2A 2B B 0.0940.002 (2.40.1) 0.1380.002 (3.50.1) C 0.3150.008 (8.00.2) 0.3150.008 (8.00.2)
G
H
D
Direction of feed
E 0.0690.004 (1.750.1) 0.0690.004 (1.750.1) A 0.0650.008 (1.650.2) 0.0630.006 (1.600.15) 0.0790.008 (2.00.2) 0.0750.008 (1.90.2) F 0.1570.004 (4.00.1) 0.1570.004 (4.00.1) K ---- 0.047 (1.2 Max.) ---- 0.047 (1.2 Max.)
T1
Dimensions - inches (mm) G 0.0790.002 (2.00.05) 0.0790.002 (2.00.05) T1 0.030 (0.75 +0.2) -0 0.030 (0.75 +0.2 ) -0 0.0350.004 (0.900.1) 0.0390.004 (1.00.1) H 0.1570.004 (4.00.1) 0.1570.004 (4.00.1) T2 ---- 0.0100.002 (0.250.05) ---- 0.0100.002 (0.250.05)
0.1380.002 (3.50.05) 0.1380.002 (3.50.05) Tape 2A (TD) 2A (TE) 2B (TD) 2B (TE)
8.2 Reel
Central hole
B C E W A D
Dimensions - inches (mm) W 0.3940.047 (10.01.2) 0.3940.047 (10.01.2) C 0.5120.020 (130.5) 0.5120.020 (130.5) D 0.8270.031 (210.8) 0.8270.031 (210.8) E 0.0790.020 (2.00.5) 0.0790.020 (2.00.5)
Tape TD TE
A 7.0080.079 (1782.0) 7.0080.079 (1782.0)
B 2.3620.079 (602.0) 2.3620.079 (602.0)
PAGE 4 OF 4
I
Bolivar Drive
I
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
www.koaspeer.com
Specifications given herein may be changed at any time without pr ior notice. Please confir m technical specifications before you order and/or use.

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