This document provides specifications for HTE series low ohm power resistors. It describes 14 resistor models in the series with part numbers like R0003 and R0005. The resistors have power ratings from 1.5W to 4W at temperatures from 70C to 100C, tolerances from ±0.25% to ±5%, and resistance values from 0.3 to 10 mohm. The document provides details on dimensions, derating curves, testing standards, packaging, and other specifications.
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Hte
1. LOW OHM
POWER RESISTORS
HTE
SERIES
Size 2512 / 1206
www.htr-india.com
Rev Date : 09/07/2021
• Open frame electron beam
welded punched out type.
•Power Rating at 100°C - upto 4W
•Power Rating at 70°C - upto 6W
R0003 to R01
AEC-Q200Qualified
e : info@htr-india.com
1/5
3. Recommended Pcb - Layout
www.htr-india.com
a
C
b
b
RECOMMENDED SOLDER PROFILE
Reflow and IR Soldering
Temperature (°C) 260 255 217
Time (Sec) Peak 40 90
Size a b c
1206 1.40 2.10 1.80
2512 3.4 1.8 3.4
Rev Date : 09/07/2021
Sense Terminals
Recommended PCB layout for high precision applications Recommended PCB layout for normal application
b b
a
c
LOW OHM
POWER
RESISTORS
HTE
SERIES
Size 2512/ 1206
e : info@htr-india.com
3/5
PARAMETER / PERFORMANCE TEST & TEST METHOD PERFORMANCE REQUIREMENTS
Power Rating For FeCrAl - Full power dissipation at 70° C and linearly derated to
zero at +170° C.
For Manganin (< 0.5% Improved Stability) -
Full power dissipation at 120° C & linearly derated to zero at +140° C.
For Manganin (< 1% Stability) - Full power dissipation at 150° C and
linearly derated to zero at +170° C.
Inductance < 2nH
Temperature Range - 65° C to +170° C (Suitably derated as per derating curve provided)
Voltage Rating / LimitingVoltage / Max.WorkingVoltage
(Subject to max.TerminalTemperature of 140° C)
LowTemperature Storage and Operation [-65° C for 250 h] ∆R ± 0.1% - Average
Temperature Coefficient of Resistance
(AmbientTemperature Range 20° C - 60° C)
Temperature Cycling -2000 cycles (-55° C to 150° C) ∆R ± 0.5% - Average
LifeTest / Operational Life - 2000 h rated power with
Temperature limitation onTerminal kept at 140° C
Moisture Resistance [MIL-STD-202 method106] ∆R ± 0.2% - Average
Mechanical Shock [100 g. 6 ms half sine] ∆R ± 0.2% -Typical
Vibration, High Frequency [20 g. 10-2000 Hz] ∆R ± 0.2% -Typical
Bias Humidity [+85° C, 85% RH, 1000h] ∆R ± 0.5% -Typical
Resistance to Soldering Heat 260°C for 10 sec / 8h steam aging
HighTemperature Exposure – 2000h / 170°C ΔR ± 1% - Average (In covered condition)
P x R
From 50 ppm (Depending on Resistance Value)
∆R ± 1% - Average
4. www.htr-india.com
Rev Date : 09/07/2021
TYPICAL POWER DERATING CURVE FOR
RESISTOR WHEn full power is at 120o
C & 150o
C
TYPICAL POWER DERATING CURVE FOR
RESISTOR WHEn full power is at 70o
C
In this graph the max. & min. curve are shown as and for all resistance values, the area between the max. & min. curve is applicable.
In case the Design Engineer requires a specific graph of a particular component it can be supplied on request.
Typical Temperature dependance of the electrical resistance
MAXIMUM PULSE ENERGY WITH RESPECT TO PULSE POWER FOR PERMANANT OPERATION
10000
1000
100
10
1
1
10000 1000
10 100
0.0001
0.001
0.01
0.1
1
10
100
0.1
0.1
0.01
0.01
Pulse width [sec]
Pulse
energy
[J]
Power
[W]
In case the Design Engineer requires a specific graph of a particular component it can be supplied on request.
•••
1
0.75
0.5
0.25
0
0 20 40 60 80 100 120 140 160 180
1.25
Terminal Temperature [°C]
P/P100 °C
Stability <1.0%
Improved Stability <0.5%
1
0.75
0,5
0.25
0
0 20 40 60 80
70 100 120 140 160 180
1.25
Terminal Temperature [°C]
P/P 70 °C
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-55 -30 -5 20 45 70 95 120 145 170
Temperature [°C]
dR/R20 [%]
Typical temperature dependence of a resistor made with FeCrAl
TCR = 0 ppm/K TCR = -50 ppm/K TCR = +50 ppm/K
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
2.0
-55 -30 -5 20 45 70 95 120 145 170
Temperature [°C]
dR/R10 [%]
Typical temperature dependence of a resistor made with Manganin
TCR = 0 ppm/K TCR = -100 ppm/K TCR = +100 ppm/K
LOW OHM
POWER
RESISTORS
HTE
SERIES
Size 2512/ 1206
e : info@htr-india.com
4/5
5. e : info@htr-india.com
5/5
PACKAGING
A. BULK
Resistors shall be packed in plastic Box-K22 of approximate size 108X66X25mm- 3000pcs/box
& this box will be vacuum sealed with polythene of 100 micron. With enclose silica gel.
B. TAPE & REEL PACKING
www.htr-india.com
Part no of HTE3W (2512),Tape and reel with resistance value R001 and 1% tolerance, will be HTE4W R0003 F (2512) R001 ±1%
Part no of HTE2W (1206), Bulk with resistance value R001 and 0.5% tolerance, will be HTE2W (1206) R001 ±0.5%
Part no of HTE2W (1206),Tape and reel with resistance value R0003 and 5% tolerance, will be HTE2WTR (1206) R0003 ±5%
SPECIFICATION SIZE TAPEWIDTH PARTS PER REEL
Rev Date : 09/07/2021
2512 (Except HTE 4W R0003 F) 12mm 7000 pcs
HTE 4W R0003 F 12mm 6000 pcs
1206 8mm 8000 pcs
LOW OHM
POWER
RESISTORS
HTE
SERIES
Size 2512/ 1206
Shelf Life (packed) : Temp 25°C to 35°C, Humidity 30 to 80% RH, Shelf life-12 months floor
Floor Life (unpacked) : Temp 25°C to 35°C, Humidity 30 to 80% RH, Floor life-15 days
ordering information
AS AN EXAMPLE
Storage Condition
SERIES HTR PART NO. TYPE RESISTANCE VALUE TOLERANCE MARKING ON RESISTOR
HTE HTE4W (2512) Tape & Reel – HTE4WTR R001 ± 1% HTR
HTE HTE2W (1206) Bulk - HTE2W R001 ± 0.5% No marking
HTE HTE2W (1206) Tape & Reel – HTE2WTR R0003 ± 5% No marking
EIA-481-D