Accutrim™ 1202
Vishay Foil Resistors
Bulk Metal® Foil Ultra High Technology Precision Trimming Potentiometers,
1 1/4" Rectilinear, RJ12 Style, Designed to Meet or Exceed The Requirements
of MIL-PRF-22097, Char. F with Smooth and Unidirectional Output
FEATURES
BULK METAL
FOIL
Resistance
Resistance
Vishay Foil precision trimmers have the Bulk Metal® Foil
resistive element which possesses a unique inherent
temperature and load life stability. Plus, their advanced
virtually back lash-free adjustment mechanism makes them
easy to set quickly and accurately and keeps the setting
exactly on target.
WIREWOUND
Wiper Travel
Wiper Travel
TABLE 1 - MODEL SELECTION
MODEL
1202
TERMINATION
STYLE
P-In line PC pins
Y-staggered PC pins (1)
L-flexible wire leads
LB-flexible wire leads
with bushings
Resistance
INTRODUCTION
• Temperature coefficient of resistance (TCR):
± 10 ppm/°C maximum (3)
(- 55 °C to + 150 °C ref. at + 25 °C);
through the wiper (4); ± 25 ppm/°C
• A smooth and unidirectional resistance with
leadscrew adjustment
• Load life stability: 0.1 % typical ΔR, 0.5 % maximum ΔR
under full rated power at + 85 °C for 2000 h
• Settability: 0.05 % typical; 0.1 % maximum
• Setting stability: 0.1 % typical; 0.5 % maximum, ΔSS
• Power rating: 0.5 W at + 85 °C
• Resistance range: 2 Ω to 20 kΩ
• “O“-ring prevents ingress of fluids during any board
cleaning operation
• Electrostatic discharge (ESD) up to 25 000 V
• Terminal finish: gold plated (tin/lead finish is available on
request)
Wiper Travel
TABLE 2 - VALUES VS. TOLERANCES
POWER
AVERAGE RATING
WEIGHT
at + 85 °C
(g)
AMBIENT
2.5
2.5
0.5 W
3.3
5.1
CERMET
NO. OF
TURNS
STANDARD RESISTANCE
VALUES (in Ω)
2, 5, 10
25 ± 2
20, 50, 100, 200, 250, 500,
1K, 2K, 5K, 10K, 20K
STANDARD TOLERANCES
± 10 % (2), ± 20 %
5 %, 10 %
Note
• See Figures 1 and 2
TABLE 3 - 1202 (RJ12) SERIES ELECTRICAL SPECIFICATIONS
Temperature Coefficient of Resistance (TCR), 50 Ω and up
± 10 ppm/°C maximum (- 55 °C to + 25 °C)
End-to-end (3)
± 10 ppm/°C maximum (+ 25 °C to + 150 °C)
2 Ω, 5 Ω, 10 Ω, 20 Ω
± 20 ppm/°C (- 55 °C to + 150 °C, ref. + 25 °C)
Through the wiper (4)
± 25 ppm/°C (- 55 °C to + 150 °C, ref. + 25 °C)
Stability
Load life at 2000 h, under full rated power of 0.5 W at + 85 °C
0.1 % typical ΔR; 0.5 % maximum ΔR
Load life at 10 000 h, under full rated power of 0.5 W at + 85 °C
0.1 % typical ΔR; 1.0 % maximum ΔR
0.5 W at + 85 °C
Power Rating (5)
0.05 % typical; 0.1 % maximum
Settability
Setting Stability
0.1 % typical; 0.5 % maximum
Contact Resistance variation - CRV (noise)
3 Ω typical; 10 Ω maximum
Hop-off
0.25 % typical; 1.0 % maximum
High-Frequency Operation
to 100 MHz
Rise time
10 ns at 1 kΩ
Inductance
0.08 µH typical
Capacitance
0.5 pF typical
Operating Temperature Range
- 55 °C to + 150 °C
Note
• Refer to page 4 for footnotes
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63055
Revision: 25-Mar-10
For any questions, contact: foil@vishaypg.com
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1
Accutrim™ 1202
Vishay Foil Resistors
TABLE 4 - MECHANICAL SPECIFICATIONS
Adjustment Turns
25 ± 2
Case Material
Glass fortified diallyl-phthalate (DAP); black
Mechanical Stops
Wiper idles - no discontinuity
Shaft Torque
8 oz. in. maximum; 3 oz. in. typical
Internal Terminations
All welded - no flux
Backlash
0.05 % typical
FIGURE 1 - SCHEMATIC AND DIMENSIONS in Inches (Millimeters)
1202P
(In-Line Pins) (1)
0.125" (3.18 mm) A
0.093" (2.36 mm) DIA (A)
2 Mtg. Holes
0.070" (1.78 mm) C
1.000" (25.40 mm) C
0.195"
(4.95 mm) A
Slot 0.025" (0.64 mm) W x
0.031" (0.79 mm) DP (A)
0.125"
(3.18 mm) A
0.325"
(8.26 mm) A
0.235"
(5.97 mm) C
0.500"
(12.70 mm) C
0.700"
(17.78 mm) C
0.028" (0.71 mm) DIA (B)
3 Pin Type Leads
0.260"
(6.60 mm) C
0.900" (22.86 mm) C
2
1
2
0.125"
(3.18 mm) DIA (A)
3
CW
1
3
Schematic
1.250" (31.75 mm) C
1202Y
(Staggered Pins) (1)
0.125" (3.18 mm) A
0.093" (2.36 mm) DIA (A)
2 Mtg. Holes
0.070" (1.78 mm) C
1.000" (25.40 mm) C
0.195"
(4.95 mm) A
Slot 0.025" (0.64 mm) W x
0.031" (0.79 mm) DP (A)
0.125"
(3.18 mm) A
0.235"
(5.97 mm) C
0.325"
(8.26 mm) A
0.500"
(12.70 mm) C
0.028" (0.71 mm) DIA (B)
3 Pin Type Leads
0.300" 0.265"
(7.62 mm) C (6.73 mm) C
0.100"
(2.54 mm) C
0.700" (17.78 mm) C
1
2
3
0.125"
(3.18 mm) DIA (A)
1
3
2
Schematic
1.250" (31.75 mm) C
TOLERANCES:
CW
STANDARD MARKING ILLUSTRATION:
A = ± 0.005" (0.13 mm)
Model No., Resistance Value,
Tolerance, TCR
B = ± 0.003" (0.08 mm)
C = ± 0.010" (0.25 mm)
Vishay Date Code
1
Note
(1)
Pin leads are gold plated nickel which are solderable or weldable.
3
2
CW
Schematic
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For any questions, contact: foil@vishaypg.com
Document Number: 63055
Revision: 25-Mar-10
Accutrim™ 1202
Vishay Foil Resistors
FIGURE 2 - SCHEMATIC AND DIMENSIONS in Inches (Millimeters)
1202L
0.093" (2.36 mm) DIA (A)
2 Mtg. Holes
3 Color Coded Leads—
# 30 AWG Teflon Coated
Insulated Stranded Wire
1.000" (25.40 mm) C
11.50" (292.10 mm)
Min. Length
(Flexible Leads)
0.125" (3.18 mm) A
0.070" (1.78 mm) C
0.195"
(4.95 mm) A
Slot 0.025" (0.64 mm) W x
0.031" (0.79 mm) DP (A)
G
0.125"
(3.18 mm) A
Y
0.325"
(8.26 mm) A
0.235"
(5.97 mm) C
R
G
0.125"
(3.18 mm) DIA (A)
Y
R
CW
Y
R
G
Schematic
1.250" (31.75 mm) C
1202LB
0.093" (2.36 mm) DIA (A)
2 Mtg. Holes
3 Color Coded Leads—
# 30 AWG Teflon Coated
Insulated Stranded Wire
1.000" (25.40 mm) C
11.50" (292.10 mm)
Min. Length
(Panel Mounted)
G
0.125" (3.18 mm) A
0.042" (1.07 mm) B
0.300"
(7.62 mm) A
0.280" (7.11 mm) B
Slot:
0.025" (0.64 mm) W x
0.031" (0.79 mm) DP (A)
# 10 - 32 N.C. - 2
0.325"
(8.26 mm) A
0.400"
0.235"
(10.16 mm) A
(5.97 mm) A
Y
0.125" (3.18 mm) C
R
1.250" (31.75 mm) C
G
0.195"
(4.95 mm) A
Rubber Gasket
Lockwasher
Hexnut
R
Y
CW
Y
G
Schematic
R
TOLERANCES:
A = ± 0.005" (0.13 mm)
B = ± 0.003" (0.08 mm)
C = ± 0.010" (0.25 mm)
Standard marking shown on previous page.
Percent of Rated Power
FIGURE 3 - POWER DERATING CURVE
+ 85 °C
+ 100
+ 75
+ 50
+ 25
0
- 75
- 50
- 25
0
+ 25
+ 50
+ 75 + 100 + 125 + 150 + 175
Ambient Temperature °C
Document Number: 63055
Revision: 25-Mar-10
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3
Accutrim™ 1202
Vishay Foil Resistors
TABLE 5 - COMPARISON
MIL-PRF-22097/2 CHARACTERISTIC F (7)
1202 MAXIMUM (Worst Case)
No failures
± 10 %
17 to 27 turns
± 2 % or 20 Ω (7)
± 3.0 % or 3 Ω (7)
No failures
± 10 %
25 ± 2 turns
2Ω
3 Ω typical, 10 Ω maximum
900 VAC, 1 min
350 VAC, 1 min
≥ 1000 MΩ
8 oz. in. maximum
± 1.0 %
900 VAC, 1 min
350 VAC, 1 min
≥ 1000 MΩ
8 oz. in. maximum
± 1.0 %
± 0.01 % (± 100 ppm/°C)
± 1.0 %
3.0 % or 3 Ω (7)
± 0.001 % (± 10 ppm/°C)
± 0.5 %
3 Ω typical, 10 Ω maximum
TEST GROUP III
Shock (specified pulse)
Vibration (high-frequency)
Contact resistance variation - CRV (noise)
Salt spray
± 1.0 %
± 1.0 %
± 3.0 % or 3 Ω (7)
No corrosion
± 0.5 %
± 0.5 %
3 Ω typical, 10 Ω maximum
No corrosion
TEST GROUP IV
Solder heat
Life (1000 h at + 85 °C) (8)
Contact resistance variation - CRV (noise)
± 1.0 %
± 2.0 %
± 3.0 % or 3 Ω (7)
± 0.05 %
± 0.5 %
3 Ω typical, 10 Ω maximum
TEST GROUP V
Low-temperature operation
High-temperature exposure
Contact resistance variation - CRV (noise)
± 1.0 %
± 2.0 %
± 3.0 % or 3 Ω (7)
± 0.5 %
± 0.5 %
3 Ω typical, 10 Ω maximum
TEST GROUP VI
Rotational life
Contact resistance variation - CRV (noise)
Terminal strength
± 2.0 %
± 3.0 % or 3 Ω (7)
2 lbs
± 2.0 %
3 Ω typical, 10 Ω maximum
2 lbs
MIL-STD-202 method 208
No continuous stream of bubbles
MIL-STD-202 method 208
No continuous stream of bubbles
MIL-STD-810 method 508
No mechanical damage
MIL-STD-810 method 508
No mechanical damage
TEST GROUP I
Visual and mechanical
Total resistance
Actual effective electrical travel
End resistance
Contact resistance variation - CRV (noise)
Dielectric withstanding voltage - DWV
Per MIL-STD-202, methods 301 and 105
Atmospheric pressure
Barometric pressure
Insulation resistance
Shaft torque
Thermal shock
TEST GROUP II
Resistance temperature characteristic - TCR
Moisture resistance
Contact resistance variation - CRV (noise)
TEST GROUP VII
Solderability (excluding terminations L and LB)
Immersion (excluding terminations L and LB)
TEST GROUP VIII
Fungus
Notes
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Preferred termination style for current 1-1/4 inch rectilinear
trimmers (staggered PC pins present a sturdier mounting
arrangement for shock, vibration, and impact situations).
10 Ω at ± 5 % available on special order.
Maximum TCR applies to the 3 σ (sigma) limit or 99.73 % of a
production lot. (Measured end-to-end with wiper off the
element.)
Measurements of TCR through the wiper are influenced more by
setting stability and the percentage of the total resistance in use
(at the wiper) than by fundamental resistance change due to
temperature alone. The parameter shown in Table 3 is a 2 σ
distribution typifying the behavior of the device when used with
40 % or more of the total resistance in use.
Derated linearly from full power at + 85 °C to zero power at
+ 150 °C. See Figure 3 in this datasheet.
All ΔR’s are measured to the tolerance specified + 0.01 Ω.
Whichever is greater.
Load-Life test performed at nominal rated power, 0.5 W, at
+ 85 °C.
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Special Available Options:
Special marking
Special lengths for lead wires (L, LB Style)
Hooked leads
Alternate bushing and PC combinations
Power conditioning and screening operations
VISHAY TRIMMERS ARE INSPECTED
100 % for:
• Immersion
• Resistance tolerance check
• End resistance
• Visual-mechanical
• Dynamic tests for continuity, CRV
By sample for:
• TCR
• DWV
For any questions, contact: foil@vishaypg.com
Document Number: 63055
Revision: 25-Mar-10
Accutrim™ 1202
Vishay Foil Resistors
Circuit A is a conventional circuit employing a high value wire
wound trimmer (4) linearized by two padding resistors (1 and
2) for the purpose of trimming resistor (3) to within less than
100 ppm absolute resistance.
1
Circuit B uses only a low value infinite resolution Vishay
trimming potentiometer (5) to accomplish the same results.
Saving in cost and board space is achieved. A low value wire
wound trimmer cannot be used because of poor resolution.
4
3
3
5
2
Circuit A
Circuit B
TABLE 6 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y5050500R000K0L (preferred part number format)
DENOTES PRECISION
VALUE
CHARACTERISTICS (1)
Y
R=Ω
K = kΩ
0 = gold plated termination (lead (Pb)-free)
1 to 999 = custom
Y
5
0
5
0
5
PRODUCT CODE
0
0
R
0
TOLERANCE
5050 = 1202L
0050 = 1202LB
0051 = 1202P
6050 = 1202PB
5051 = 1202Y
7050 = 1202YB
0
0
K
0
L
PACKAGING
J =±5%
K = ± 10 %
M = ± 20 %
L = foam/box pack
FOR EXAMPLE: ABOVE GLOBAL ORDER Y5050 500R000 K 0 L:
TYPE: 1202L
VALUE: 500.0 Ω
ABSOLUTE TOLERANCE: ± 10.0 %
TERMINATION: gold plated (lead (Pb)-free)
PACKAGING: foam/box pack
HISTORICAL PART NUMBER: 1202L 500R00 K B (will continue to be used)
1202L
500R00
K
B
MODEL
RESISTANCE VALUE
TOLERANCE
PACKAGING
1202L
1202LB
1202P
1202PB
1202Y
1202YB
500.0 Ω
J=±5%
K= ± 10 %
M= ± 20 %
B = bulk pack
Note
(1)
For non-standard requests, please contact application engineering.
Document Number: 63055
Revision: 25-Mar-10
For any questions, contact: foil@vishaypg.com
www.foilresistors.com
5
Legal Disclaimer Notice
Vishay Precision Group
Disclaimer
ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their
behalf (collectively, “Vishay Precision Group”), disclaim any and all liability for any errors, inaccuracies or
incompleteness contained herein or in any other disclosure relating to any product.
The product specifications do not expand or otherwise modify Vishay Precision Group’s terms and
conditions of purchase, including but not limited to, the warranty expressed therein.
Vishay Precision Group makes no warranty, representation or guarantee other than as set forth in the terms
and conditions of purchase. To the maximum extent permitted by applicable law, Vishay Precision
Group disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and
all liability, including without limitation special, consequential or incidental damages, and (iii) any and
all implied warranties, including warranties of fitness for particular purpose, non-infringement and
merchantability.
Information provided in datasheets and/or specifications may vary from actual results in different
applications and performance may vary over time. Statements regarding the suitability of products for
certain types of applications are based on Vishay Precision Group’s knowledge of typical requirements that
are often placed on Vishay Precision Group products. It is the customer’s responsibility to validate that a
particular product with the properties described in the product specification is suitable for use in a particular
application.
No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or
by any conduct of Vishay Precision Group.
The products shown herein are not designed for use in life-saving or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay Precision Group products not expressly
indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay
Precision Group for any damages arising or resulting from such use or sale. Please contact authorized
Vishay Precision Group personnel to obtain written terms and conditions regarding products designed for
such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document No.: 63999
Revision: 27-Apr-2011
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