www.vishayfoilresistors.com
2
SMR1DZ / SMR3DZ (Z-Foil)
For any questions, contact
foil@vpgsensors.com
4151-EN
Rev 13-Aug-2020
Table 2—Performance Specifications
Parameters Specifications Maximum Limit
(1)
SMR1DZ SMR3DZ SMR1DZ SMR3DZ
Resistance Range 5 Ω to 33 kΩ 5 Ω to 80 kΩ
Rated Power
5 Ω to <10 kΩ
0.250 W at 70°C
0.125 W at 125°C
10 kΩ to 33 kΩ
0.160 W at 70°C
0.08 W at 125°C
5 Ω to <30 kΩ
0.6 W at 70°C
0.3 W at 125°C
30 kΩ to 80 kΩ
0.4 W at 70°C
0.2 W at 125°C
See Figure 1
Weight 0.1143 g 0.244 g
Packaging Bulk (loose) or tape and reel, per EIA-481-1
Test Conditions Maximum Limit
(1)
Max. Working Voltage 73 V 180 V —
Max. Operating
Temperature
+175°C (see Figure 1) —
Working Temperature
Range
–55°C to +125°C (MIL range) —
ThermalShock –65°C to +150°C; 30 min; 5 cycles
R >100 Ω: ±0.02% (200 ppm)
R ≤100 Ω: ±0.03% (300 ppm)
Short Time Overload 6.25 x rated power; 5 s ±0.01% (100 ppm)
Low Temperature
Operation
–65°C, 24 h (no load): 45 min at rated power ±0.01% (100 ppm)
Dielectric Withstanding
Voltage
Atmospheric pressure; AC 200 V; 1 min ±0.01% (100 ppm)
Insulation Resistance DC 100 V; 1 min over 10 000 MΩ
Resistanceto
SolderingHeat
260°C for 10 s ±0.03%
Moisture Resistance +65°C to –10°C; 90% to 98% RH; rated power; 240 h ±0.03% (300 ppm)
Shock 100 G; Sawtooth ±0.01% (100 ppm)
Vibration, High Frequency 10~2000~10 Hz; 20 G; X, Y, Z each 2.5 h ±0.01% (100 ppm)
Load-Life Stability
(2000 h)
0.04 W at +70°C
0.25 W at +70°C
0.125 W at +125°C
0.1 W at +70°C
0.6 W at +70°C
0.3 W at +125°C
Typical
0.005%
0.02%
0.05% max
Typical
0.005%
0.015%
0.05% max
High Temperature
Exposure
175°C; no load 2000 h ±0.1% (1000 ppm)
Note
(1)
As shown +0.01 Ω to allow for measurement errors at low values.
extremely low, this characteristic has been further refined
over the years. The SMRxDZ utilizes ultra high precision
Bulk Metal
®
Z-Foil.
The Z-Foil technology provides a significant reduction of
the resistive element’s sensitivity to ambient temperature
variations (TCR) and to self heating when power is applied
(power coefficient).
Voltage division with tight tracking <2 ppm/°C can be
achieved with two randomly selected units even with a
large ratio between the two values.
Our Application Engineering Department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us.
