Accutrim™ 1260 (RJ24 Style)
®
Bulk
Metal
Foil Ultra
High
Technology
Precision
BulkMetal®Foil
UltraHigh
Technology
Precision
Trimming
Potentiometers,
3⁄8inSquare,RJ24Style
3
Trimming Potentiometers, ⁄8 in Square, RJ24 Style
Designed to Meet or Exceed the Requirements of MIL-PRF-39035,
Char. H with a Smooth and Unidirectional Output
FEATURES
Wiper Travel
INTRODUCTION
VFR 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
Resistance
BULK METAL®
FOIL
Resistance
Resistance
• Temperature coefficient of resistance (TCR):
±10 ppm/°C (–55°C to +150°C ref. at +25°C); through
the wiper(2); ±25 ppm/°C (see table 2 for low values)
• A smooth and unidirectional resistance with
leadscrew adjustment
• Load life stability: 0.1% typical ΔR, 1.0% maximum ΔR
under full rated power at +85°C for 10 000 h
• Settability: 0.05% typical; 0.1% maximum
• Setting stability: 0.1% typical; 0.5% maximum
• Power rating: 0.25 W at +85°C
• Resistance range: 5 Ω to 10 kΩ
• Resistance tolerance: ±5%, ±10%
• “O”-ring prevents ingress of fluids during any board
cleaning operation
• Electrostatic discharge (ESD) up to 25 kV
• Terminal finish: tin/lead or gold plated
Wiper Travel
CERMET
Wiper Travel
Table 1 – Model Selection
MODEL
1260
TERMINATION STYLE
W-edge mount, top adjust
X-edge mount, side adjust
AVERAGE WEIGHT (g)
POWER RATING at +85°C AMBIENT
NO. OF
TURNS
0.4
0.25 W
21±2
Note
See Figure 1
Note
*T
his datasheet provides information about parts that are RoHS-compliant and/or parts that are non-RoHS-compliant. For example,
parts with lead (Pb) terminations are not RoHS compliant. Please see the information/tables in this datasheet for details.
4122-EN
Rev 30-Aug-2021
For any questions, contact
foil@vpgsensors.com
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1
Accutrim™ 1260 (RJ24 Style)
Table 2 – 1260 (RJ24 Style) Series
Electrical Specifications
Temperature Coefficient of
Resistance (TCR) 50 Ω to 10 kΩ
End-to-end(1)
Temperature Coefficient of
Resistance 5, 10 and 20 Ω
Through the wiper(2)
Stability
Load life at 10 000 h
Table 3 – Values vs. Tolerances
±10 ppm/°C maximum
(–55°C to +150°C,
+25°C ref.)
±20 ppm/°C
±25 ppm/°C
0.1% typical ΔR
1.0% maximum ΔR
(under full rated power of
0.25 W at +85°C)
STANDARD RESISTANCE VALUES
(in Ω)
STANDARD
TOLERANCE
5, 10
±10%
20, 50, 100, 200, 500, 1k, 2k, 5k, 10k
±5%
Table 4 – Mechanical Specifications
Adjustment Turns
21±2
Mechanical Stops
Wiper idles – no discontinuity
Internal
Terminations
All welded – no flux
0.05% typical;
0.1% maximum
Case Material
Diallyl-phthalate: black (DAP)
Shaft Torque
3 oz. in maximum
Setting Stability
0.1% typical;
0.5% maximum
Backlash
Contact Resistance
Variation – CRV (noise)
3 Ω typical;
10 Ω maximum
Hop-off
0.25% typical;
1.0% maximum
Power Rating(3)
0.25 W at +85°C
Settability
High-Frequency Operation
Rise/decay time
Inductance
Capacitance
Operating Temperature Range
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2
0.005% typical
1.0 ns without ringing
0.08 µH typical
0.5 pF typical
–55°C to +150°C
For any questions, contact
foil@vpgsensors.com
4122-EN
Rev 30-Aug-2021
Accutrim™ 1260 (RJ24 Style)
Figure 1 – Schematic and Dimensions in inches (millimeters)
1260W
0.081 ±0.010" (2.06 ±0.25 mm)
0.080" (2.03 mm) maximum
VFR
0.420" (10.67 mm) maximum
2
0.015" (0.38 mm)
minimum
CW
0.300" (7.62 mm) minimum
3
1
3 pins
0.024 ±0.006" (0.61 ±0.15 mm) diameter
0.090 ±0.005"
(2.29 ±0.13 mm) diameter
0.170 ±0.025"
(4.32 ±0.64 mm)
±0.010" (±0.25 mm) C
0.100 ±0.005"
(2.54 ±0.13 mm)
0.375 ±0.015"
(9.53 ±0.38 mm)
0.187 ±0.020"
(4.75 ±0.51 mm)
1260X
0.075 ±0.010"
(1.91 ±0.25 mm)
NOTES
Adjustment screw 0.090 in
(2.29 mm) diameter with
0.020 in (0.51 mm) × 0.031 in
(0.79 mm) slot.
Model 1260 has tin/lead or
gold plated pins.
0.024 in (0.61 mm) diameter,
0.300 in (7.62 mm) length
minimum.
0.080" (2.03 mm) maximum
0.081 ±0.010"
(2.06 ±0.25 mm)
0.420" (10.67 mm)
maximum
VFR
2
CW
0.015" (0.38 mm)
minimum
0.300" (7.62 mm) minimum
1
STANDARD MARKING
Model No.
Date code
Resistance value
Tolerance
Termination finish – in case
of lead free (L.F)
3
3 PINS
0.024 ±0.006" (0.61 ±0.15 mm) diameter
0.075 ±0.010"
(1.91 ±0.25 mm)
0.170 ±0.025"
(4.32 ±0.64 mm)
±0.010" (±0.25 mm) C
0.090 ±0.005"
(2.29 ±0.13 mm) DIA
0.100 ±0.005"
(2.54 ±0.13 mm)
0.375 ±0.015"
(9.53 ±0.38 mm)
0.187 ±0.020"
(4.75 ±0.51 mm)
Percent of Rated Power
Figure 2 – Power Derating Curve
+85°C
+100
+75
+50
+25
0
–75
–50
4122-EN
Rev 30-Aug-2021
–25
0
+25
+50
+75
+100 +125 +150 +175
Ambient Temperature °C
For any questions, contact
foil@vpgsensors.com
www.vpgfoilresistors.com
3
Accutrim™ 1260 (RJ24 Style)
Table 5 – Comparison
TEST GROUP I
Conditioning
Contact resistance variation – CRV (noise)
Immersion
TEST GROUP I a
Visual and mechanical
Actual effective electrical travel
End resistance
MIL-PRF-39035/2 CHARACTERISTIC H(4)
1260 MAXIMUM
±1.0%
±3.0% or 3 Ω(5)
No continuous stream of bubbles
±0.5%
3 Ω typical, 10 Ω maximum
No continuous stream of bubbles
No failures
10 to 25 turns
2% or 2 Ω(5)
No failures
21±2 turns
2 Ω for values ≤1 kΩ;
5 Ω for values ≥ 2 kΩ;
600 VAC, 1 min
250 VAC, 1 min
≥1000 MΩ
3 oz. in. maximum
±1.0%
±1.0%
600 VAC, 1 min
250 VAC, 1 min
>1000 MΩ
3 oz. in. maximum
±0.5%
±0.5%
Per MIL-STD-202, method 208
Per MIL-STD-202, method 208
Dielectric withstanding voltage – DWV
Per MIL-STD-202, methods 301 and 105
Atmospheric pressure
Barometric pressure
Insulation resistance
Shaft torque
Thermal shock
Setting stability
TEST GROUP II
Solderability
TEST GROUP III
Resistance temperature characteristic – TCR
Moisture resistance
Contact resistance variation – CRV (noise)
TEST GROUP IV
Settability
Shock
Setting stability
Vibration
Setting stability
Contact resistance variation – CRV (noise)
Salt spray
TEST GROUP V
Solder heat
Low-temperature operation
Setting stability
Low-temperature storage
High-temperature exposure
Setting stability
Contact resistance variation – CRV (noise)
Integrity of shaft
TEST GROUP VI
Rotational life (200 cycles)
Contact resistance variation – CRV (noise)
Terminal strength
TEST GROUP VII
Life (2000 h) at +85°C
Life (10 000 h) at +85°C
TEST GROUP VIII
Solvent resistance
±0.005%/°C (±50 ppm/°C)
±1.0%
3.0% or 3 Ω(5)
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
3.0% or 3 Ω(5)
No corrosion
±0.1%
±0.5%
±0.5%
±0.5%
±0.5%
3 Ω typical, 10 Ω maximum
No corrosion
±1.0%
±1.0%
±2.0%
±1.0%
±3.0%
±2.0%
3.0% or 3 Ω(5)
No loosening or breakage
±0.1%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
3 Ω typical, 10 Ω maximum
No loosening or breakage
±2.0%
3.0% or 3 Ω(5)
2 lbs.
±2.0%
3 Ω typical, 10 Ω maximum
2 lbs.
±3.0%
±5.0%
±0.1% typical, ±1.0% maximum
±0.1% typical, ±1.0% maximum
No failures
No failures
Notes
(1)
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.)
(2)
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 2 is a 2 s
distribution typifying the behavior of the device when used with
40% or more of the total resistance in use.
(3)
Derated linearly for full power at +85°C to zero power at
+150°C. See Figure 2.
(4)
All ΔR’s are measured to the tolerance specified +0.01 Ω.
(5)
Whichever is greater.
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4
±0.001%/°C (±10 ppm/°C)
±0.5%
3 Ω typical, 10 Ω maximum
Special Available Options
Special marking, Power conditioning and screening operations.
VFR 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@vpgsensors.com
4122-EN
Rev 30-Aug-2021
Accutrim™ 1260 (RJ24 Style)
Table 2 – Global Part Number Information
NEW GLOBAL PART NUMBER: Y0069500R000J0L (preferred part number format)
DENOTES PRECISION
Y
Y
0
0
CHARACTERISTICS (1)
VALUE
R=Ω
K = kΩ
6
9
5
PRODUCT CODE
0
0
9 = lead (Pb) - free (gold plated)
0 = tin/lead termination
1 to 999 = custom
R
0
0
0
TOLERANCE
0069 = 1260W
4069 = 1260X
J
0
L
PACKAGING
J = ± 5%
K = ±10%
M = ± 20%
L = foam/box pack
FOR EXAMPLE: ABOVE GLOBAL ORDER Y0069 500R000 J 0 L:
TYPE: 1260W
VALUE: 500.0 Ω
ABSOLUTE TOLERANCE: ±5.0%
TERMINATION: tin/lead
PACKAGING: foam/box pack
HISTORICAL PART NUMBER: 1260W 500R00 J B B (will continue to be used)
1260W
500R00
J
MODEL
RESISTANCE VALUE
TOLERANCE
1260W
1260X
500R00 = 500.00 Ω
J = ±5%
K = ±10%
M = ±20%
B
B
TERMINATION
PACKAGING
B = foam/box pack
S = gold plated
termination
B = tin/lead
Note
(1)
For non-standard requests, please contact application engineering.
4122-EN
Rev 30-Aug-2021
For any questions, contact
foil@vpgsensors.com
www.vpgfoilresistors.com
5
