SMU Series
SMD, single-turn, sealed cermet trimmers
•ꢀAvailableꢀinꢀJ-hookꢀandꢀgull-wingꢀterminalꢀconfigurations
•ꢀMeetsꢀEIA,ꢀEIAJ,ꢀIPC,ꢀVECIꢀstandardꢀSMDꢀtrimmerꢀdesigns
•ꢀPb-freeꢀandꢀCd-freeꢀconstruction
•ꢀRoHSꢀcompliant
•ꢀGold-platedꢀleadsꢀprovideꢀhighꢀconductivity,ꢀlowꢀcontactꢀ
resistance,ꢀhighꢀcorrosionꢀresistanceꢀandꢀgoodꢀsolderability
•ꢀTopꢀcross-slotꢀadjustmentꢀ(topꢀsingle-slotꢀmodelsꢀavailableꢀ
asꢀspecialꢀorder)
•ꢀTapeꢀandꢀreelꢀpackaging
SꢀꢁꢂꢀS SpꢀcꢂfꢂcatꢂonS
Manufactured
Range (Ω)
50-2M
Series
SMUA
SMUB
Wattage
0.125
0.25
Rotation
250° ± 10°
250° ± 10°
Adj. Location Taper Tolerance
Top
Linear
20%
50-2M
Top
Linear
20%
chaꢁactꢀꢁꢂStꢂcS
50Ω to 2MΩ
(standard 1, 2 & 5 sequence)
-55°C, 0.125 watt, 1 hour
+125°C, 250 hours
ΔT/R≤±2%,
S.S.≤±2%
Standard Resistance
Range
Low Temperature
Operation
±20% standard
ΔT/R≤±2%,
S.S.≤±2%
Resistance Tolerance
End Resistance
Temp. Range
High Temp.
Exposure
1% or 3Ω, whichever is greater
-55°C to +125°C
+70°C, 0.125 watt, 1,000 hours
ΔT/R≤±3%,
S.S.≤±2%
Load Life
Thermal Shock
Shock
Linear
Resistance Taper
Peak Noise (C.R.V.)
Power Rating
-55°C, +125°C, 30 minutes each, ΔT/R≤±2%,
5 cycles
2% or 3Ω, whichever is greater
SMUA 0.125w @70°C; 0w @+125°C
SMUB 0.250w @70°C; 0w @ +125°C
S.S.≤±1%
100G, 6ms, 6 directions, 3 times
each
ΔT/R≤±1%,
S.S.≤±1%
200VDC or power rating, whichever is
smaller
Maximum Input Voltage
Temperature Coefficient
10-2,000Hz, 1.5mm amplitude,
20G, 12 hours
ΔT/R≤±1%,
S.S.≤±1%
Vibration
±100ppm/°C, 200Ω to1MΩ
±250ppm/C, other values
+40°C, 90-95%RH, 0.125 watt,
500 hours
ΔT/R≤±3%,
S.S.≤±2%
Humidity
100MΩ minimum at 500VDC
500VAC, 1 minute
250° ±10°
Insulation Resistance
Dielectric Strength
Adjustment Travel
Mechanical Travel
Shaft Torque
-10°C to +65°C, 80-98%RH,
0.125 watt, 10 cycles, 240 hours
ΔT/R≤±3%
Moisture
Resistance
240°C, 10 seconds
ΔT/R≤±1%
Soldering Heat
Resistance
250° ±10°
0 gf•cm (0.69 oz• in) max.
200 gf•cm (2.77 oz• in) min.
Meets UL 94V-0
Seal Test +85°C, hot water for 1 minute
ΔT/R≤±5%
Stop Strength
Rotational Life 100 cycles without discontinuity,
no load
Flammability of Plastic
Materials
0.068g
Nominal Weight
Marking
Position of Rotor Inside
#1 #3
Outside Markings
#1 #3
Resistance value or code, date code
clockwise
ccw #1
#3 cw
#2
#2
#2
wiper
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
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