SURFACE MOUNT CERMET TRIMMERS
RoHS compliant
SM-3/31
INTERNAL STRUCTURE
1
9
2
3
4
5
8
7
6
Part name
■ FEATURES
● RoHS compliant
● Fine adjustment is possible
● Automatic mounting is possible (Taping)
● Reflow soldering is possible
● Sealed construction (Washable: Refer to page 698.)
Material
Flammability
Polyphenylenesulphide
UL94V-0
1
Housing
2
Base element
3
Electrode
Ag-Pd cermet
4
Resistive element
RuO2 cermet
5
Adhesive
6
Wiper
7
Terminal pin
8
Rotor gear
9
Shaft
Ceramic
Epoxy
—
Multi metal alloy
Copper alloy, Sn-Cu-plated
Polyamide
UL94V-0
Brass, Nickel-plated
—
■ PART NUMBER DESIGNATION
S M - 3 □ T W 1 kΩ ( 1 0 2 )
Series name
Resistance code
Electrical turn
Resistance value
Blank:11 turns
1:5 turns
Form of packaging
T:Taping (Reel)
Blank:Bulk in plastic bag
※ Please refer to the LIST OF PART NUMBERS when placing orders.
Product shape (Shape of terminal)
A, W:J-hook
B:Gull wing
SM-3/31
SURFACE MOUNT TRIMMERS
■ LIST OF PART NUMBERS
Adjustment
position
Electrical turns
11
Side adjustment
Top adjustment
5
Side adjustment
Taping (reel)
Plastic bag
W (J-hook)
SM-3TW
SM-3W
A
(J-hook)
SM-3TA
SM-3A
B
(Gull wing) SM-3TB
SM-3B
W (J-hook)
SM-31TW
SM-31W
A
(J-hook)
SM-31TA
SM-31A
B
(Gull wing) SM-31TB
SM-31B
500 pcs./reel
Pieces in package
Fig. 1
※ The above part numbers are all available with the respective combination
of (Fig. 1).
※ Verify the above part numbers when placing orders.
※ Taping specification is not sold separately and must be purchased in reel units.
■ MECHANICAL CHARACTERISTICS
50 Ω ~ 2 M Ω
Operating torque
5 mN·m {51 gf·cm} maximum
± 20 %
Mechanical stop
Clutch action
Resistance tolerance
Power ratings
20 kΩ 50 kΩ 100 kΩ 200 kΩ 500 kΩ 1 MΩ 2 MΩ
50 pcs./pack
■ ELECTRICAL CHARACTERISTICS
Nominal resistance range
50 Ω 100 Ω 200 Ω 500 Ω 1 k Ω 2 k Ω 5 k Ω 10 k Ω
Form of packaging
Shape of terminal
Top adjustment
〈Nominal resistance values〉
0.125 W (70 °C) 0 W (150 °C)
Rotational life
200 cycles [ Δ R/R ≦ ± (2 Ω +3 %)]
(B)
Thrust to shaft
5 N {0.51 kgf} minimum
Resistance law
Linear law
Maximum input voltage
DC200 V or power rating, whichever is smaller
Solderability
245 ± 3 °C, 2 ~ 3 s
Maximum wiper current
100 mA or power rating, whichever is smaller
Shear (Adhesion)
5 N {0.51 kgf} 10 s
Effective electrical turn
11 turns (SM-3) / 5 turns (SM-31)
Substrate bending
Width 90 mm, bend 3 mm, 5 s, 1 time
End resistance
1 % or 3 Ω , whichever is greater
Pull-off strength
C.R.V.
3 % or 3 Ω , whichever is greater
Insulation resistance
± 100 10-6/°C maximum
100 M Ω minimum (DC500 V)
Dielectric strength
AC600 V, 60 s
Net weight
Approx. 0.10 g
〈Reflow profile for soldering heat evaluation〉
Temperature
(℃)
250
200
150
100
50
Peak : 250
+5
0
℃
Over 230 ℃
180 ℃
150 ℃
{ }:Reference only
− 65 ~ 150 °C
Operating temp. range
Temp. coefficient
5 N {0.51 kgf} 10 s
Pre Heating Zone
90 ± 30 s
30 ± 10 s
Heating time
Soldering Zone
Reflow : two times maximum
■ ENVIRONMENTAL CHARACTERISTICS
Test item
Test conditions
Specifications
Thermal shock − 65 ~ 150 °C (0.5 h), 5 cycles
[ Δ R/R ≦ 2 %]
[S.S. ≦ 2 %]
Humidity
[ Δ R/R ≦ 3 %]
Shock
− 10 ~ 65 °C (80 ~ 98 %),
10 cycles, 240 h
981 m/s2, 6 ms
6 directions for 3 times each
Vibration
(Amplitude) 1.52 mm or
(Acceleration) 196 m/s2,
10 ~ 2000 Hz, 3 directions, 12 times each
Load life
70 °C, 0.125 W, 1000 h
Low temp. operation
− 65 °C, 2 h
High temp. exposure
150 °C, 250 h
Immersion seal
85 °C, 60 s
Reflow : Peak temperature 255 °C
Soldering heat (Please refer to the profile below.)
Manual soldering:350 ± 10 °C, 3 ~ 4 s
[ Δ R/R ≦ 1 %]
[S.S. ≦ 1 %]
[ Δ R/R ≦ 3 %]
[S.S. ≦ 2 %]
[ Δ R/R ≦ 2 %]
[S.S. ≦ 2 %]
[ Δ R/R ≦ 3 %]
[S.S. ≦ 2 %]
No leaks
(No continuous bubbles)
[ Δ R/R ≦ 1 %]
Δ R/R:Change in total resistance
S.S. :Setting stability
SM-3/31
SURFACE MOUNT TRIMMERS
■ MAXIMUM INPUT RATINGS
Nominal resistance values ( Ω )
Resistance code
Maximum input voltage (V)
Maximum wiper current (mA)
50
100
200
500
500
101
201
501
2.50
3.53
5.00
7.91
50.0
35.4
25.0
15.8
1 k
2 k
5 k
10 k
20 k
50 k
102
202
502
103
203
503
11.2
15.8
25.0
35.4
50.0
79.1
11.2
7.91
5.00
3.54
2.50
1.58
100 k
200 k
500 k
1 M
2 M
104
204
504
105
205
112
158
200
200
200
1.12
0.79
0.40
0.20
0.10
■ RECOMMENDED P.C.B. PAD OUTLINE DIMENSIONS
● SM-3W/31W
● SM-3A/31A
(Unit : mm)
● SM-3B/31B
1.3
1.3
1.3
4
0
0
0
1.6
1.6
1.6
0
4.4
1.3
2.43
3.12
1.6
1.6
2
1.3
2.8
0.9
2.8
2
0.9
0.9
2.8
2.8
※ Also available to place as the
above.
0.9
Note) The zero point is the center of mounting.
■ OUTLINE DIMENSIONS
Unless otherwise specified, tolerance : ± 0.3 (Unit : mm)
● SM-3W/31W
Top adjustment
1
3
CW rotation
2
Resistance code & Production date code
1
0.8
1
3
2.3
3.2
3.5
3.9
0.6
2.8
2
3.9
4.2
0.4W × 1.3L × 0.3D
0.8
※ Note the terminal position.
SM-3/31
SURFACE MOUNT TRIMMERS
■ OUTLINE DIMENSIONS
Unless otherwise specified, tolerance : ± 0.3 (Unit : mm)
● SM-3A/31A
Side adjustment
● SM-3B/31B
Side adjustment
2
※ Note the terminal position.
2.5
2.5
0.4W × 1.3L × 0.3D
0.4W × 1.3L × 0.3D
3.9
3.9
1
3.4
3 – 0.8
2
5.3
3.9
3 – 0.8
2
3.4
3.9
1
3
CW rotation
Resistance code &
Production date code
Resistance code &
Production date code
4.4
1
2 – 0.6
3
1
2.8
3
2 – 0.6
2.8
1
■ PACKAGING SPECIFICATIONS
● Taping version is packaged in 500 pcs. per reel.
Orders will be accepted for units of 500 pcs., i.e., 500,
1000, 1500 pcs., etc.
● Taping version is boxed with one reel.
● EMBOSSED TAPE DIMENSIONS
Maximum number of consecutive missing pieces = 2
Leader length and reel dimension are shown in the diagrams below.
● REEL DIMENSIONS
(Conforms to JIS C 0806-3)
(In accordance with EIAJ ET-7200A)
Filled
(Unit: mm)
Empty
End
13
Head
Direction of feed
20 pitches min.
21±0.8
2±0.5
Leader
60
40 mm min.
+1
0
+1
0
Empty
400 mm min.
13±0.2
0
180 –1.5
15.4±1
SM-3/31
SURFACE MOUNT TRIMMERS
● SM-3TW/31TW
1.75 ± 0.1
4 ± 0.1
2 ± 0.05
φ
1.
A
0.4 ± 0.1
Installation example
(SM-3W)
12
+0.3
–0.1
5.5 ± 0.05
.1
+0 0
5
3
A
2
8 ± 0.1
1
Cross section A-A
4.7
φ
.1
+0 0
5
1.
4 ± 0.1
2 ± 0.05
A
3
1.75 ± 0.1
● SM-3TA/31TA
0.4 ± 0.1
Installation example
(SM-3A)
+0.3
12 –0.1
5.5 ± 0.05
1
A
3.9
8 ± 0.1
2
Cross section A-A
φ
.1
+0 0
5
1.
4 ± 0.1
2 ± 0.05
A
3
1.75 ± 0.1
● SM-3TB/31TB
0.4 ± 0.1
Installation example
(SM-3B)
A
2
8 ± 0.1
● Unit of bulk in a plastic bag is 50 pcs. per pack.
● Boxing of bulk in a plastic bag is performed with 200
pcs. per box.
+0.3
12 –0.1
5.5 ± 0.05
1
3.9
Cross section A-A
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Nidec:
SM-3TW502 SM-31TW104 SM-3TW503 SM-31TW502 SM-3TW501 SM-3TW104 SM-3TW101 SM-3TW201 SM31TW103 SM-3TW203 SM-3TW102 SM-31TW102 SM-3TW202 SM-31TW501 SM-3TW103 SM-31A101 SM31A102 SM-31A103 SM-31A104 SM-31A105 SM-3W501 SM-3W502 SM-3W503 SM-3W504 SM-3W201 SM3W202 SM-3W203 SM-3W204 SM-3W205 SM-3W500 SM-3TW504 SM-3W101 SM-3W102 SM-3W103 SM3W104 SM-3W105 SM-3TB503 SM-3TB504 SM-3TW105 SM-3TW204 SM-3TW205 SM-3TW500 SM-3TB203
SM-3TB204 SM-3TB205 SM-3TB500 SM-3TB501 SM-3TB502 SM-3TB102 SM-3TB103 SM-3TB104 SM-3TB105
SM-3TB201 SM-3TB202 SM-3TA500 SM-3TA501 SM-3TA502 SM-3TA503 SM-3TA504 SM-3TB101 SM3TA105 SM-3TA201 SM-3TA202 SM-3TA203 SM-3TA204 SM-3TA205 SM-3B503 SM-3B504 SM-3TA101 SM3TA102 SM-3TA103 SM-3TA104 SM-3B203 SM-3B204 SM-3B205 SM-3B500 SM-3B501 SM-3B502 SM-3B102
SM-3B103 SM-3B104 SM-3B105 SM-3B201 SM-3B202 SM-3A500 SM-3A501 SM-3A502 SM-3A503 SM-3A504
SM-3B101 SM-3A105 SM-3A201 SM-3A202 SM-3A203 SM-3A204 SM-3A205 SM-31W503 SM-31W504 SM3A101 SM-3A102
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