Y40531K00000J0L Datasheet Y5053200R000J0L, Y00535K00000J0L, Y505310K0000J0L | P1-P3

Bulk Metal

Foil Technology Ultra High Precision Trimming Potentiometers,

" Square, RJ26 Style, Designed to Meet or Exceed The Requirements of

MIL-PRF-39035, Char. H with a Smooth and Unidirectional Output

Accutrim™ 1240 (RJ26 Style)

Vishay Foil Resistors

Document Number: 63053 For any questions, contact: foil@vishaypg.com www.foilresistors.com

Revision: 23-Mar-10 1

INTRODUCTION

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.

FEATURES

• Temperature coefficient of resistance (TCR):

± 10 ppm/°C. (- 55 °C to + 150 °C ref. at + 25 °C);

through the wiper

(3)

; ± 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, DSS

• Power rating: 0.25 W at + 85 °C

• Resistance range: 5 Ω to 10 kΩ

• Tolerance: ± 5 %, ± 10 %

• Electrostatic discharge (ESD) up to 25 000 V

• Terminal finish: gold plated (tin/lead finish is available on

request)

Note

• See Figure 1, next page

1240P 1240W 1240X

CERMET

Wiper Travel

Resistance

Wiper Travel

Resistance

BULK METAL

FOIL

WIREWOUND

Wiper Travel

Resistance

TABLE 1 - MODEL SELECTION

MODEL TERMINATION STYLE AVERAGE WEIGHT (g) POWER RATING at + 85 °C AMBIENT NO. OF TURNS

1240

W-edge mount, top adjust

0.4 0.25 W 21 ± 2X-edge mount, side adjust

P-horizontal mount, side adjust

TABLE 2 - 1240 (RJ26) SERIES

ELECTRICAL SPECIFICATIONS

Temperature Coefficient of

Resistance (TCR) 50 Ω to 10 kΩ

± 10 ppm/°C maximum

(- 55 °C to + 150 °C,

+ 25 °C ref.)

End-to-end

(2)

Temperature Coefficient of

Resistance 5, 10 and 20 Ω ± 20 ppm/°C

Through the wiper

(3)

± 25 ppm/°C

Stability

Load life at 10 000 h

End-to-end

(2)

0.1 % typical ΔR

1.0 % maximum ΔR

(under full rated power of

0.25 W at + 85 °C)

Power Rating

(4)

0.25 W at + 85 °C

Settability 0.05 % typical;

0.1 % maximum

Setting Stability 0.1 % typical;

0.5 % maximum

Contact Resistance

Variation - CRV (noise)

(5)

3 Ω typical;

10 Ω maximum

Hop-off 0.25 % typical;

1.0 % maximum

High-Frequency Operation

Rise time

Inductance

Capacitance

1.0 ns without ringing

0.08 µH typical

0.5 pF typical

Operating Temperature Range - 55 °C to + 150 °C

TABLE 3 - VALUES VS. TOLERANCES

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 ±

Mechanical Stops

Wiper idles - no discontinuity

Internal

Terminations

All welded - no flux

Case Material

1240X - diallyl-phthalate: green (DAP)

1240W - diallyl-phthalate: green (DAP)

1240P - thermoplastic: black

Shaft Torque

3 oz. in. maximum

Backlash

0.005 % typical

Accutrim™ 1240 (RJ26 Style)

Vishay Foil Resistors

www.foilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63053

2 Revision: 23-Mar-10

FIGURE 1 - SCHEMATIC AND DIMENSIONS in Inches (Millimeters)

TOLERANCES:

A = ± 0.005" (0.13 mm)

C = ± 0.010" (0.25 mm)

D = ± 0.020" (0.51 mm)

STANDARD MARKING:

Model No.

Date Code

Resistance Value

Tolerance

NOTES:

Adjustment screw 0.080" (2.03 mm) diameter with

0.025" (0.64 mm) X 0.030" (0.76 mm) slot. Tolerance on

screw dimensions is ± 0.005" (0.13 mm). Model 1240

has gold plated terminal pins 0.016" (0.41 mm) ± 0.001"

(0.03 mm) diameter, 0.200" (5.08 mm) length minimum.

1240X

0.050" (1.27 mm) C

0.040" (1.02 mm) C

VISHAY

0.250" (6.35 mm) D

0.100" (2.54 mm) A

0.050" (1.27 mm) C

0.175" (4.45 mm) C

0.125" (3.18 mm) C

(bottom view)

1240W

3 12

0.050" (1.27 mm) C

VISHAY

0.250" (6.35 mm) D

0.100" (2.54 mm) A

0.050" (1.27 mm) C

0.175" (4.45 mm) C

0.125" (3.18 mm) C

0.040" (1.02 mm) C

0.010" (0.25 mm) A

(bottom view)

Resistance

Value

Tolerance

0.055" (1.40 mm) C

0.050" (1.27 mm) C

VISHAY

0.175" (4.45 mm) C

2 3

0.250" (6.35mm) D

0.100" (2.54 mm) A

0.035" (0.89 mm) C

0.250" (6.35 mm) D

0.125" (3.18 mm) C

Model No.

Date Code

0.016"

(0.41 mm) A

1240P

FIGURE 2 - POWER DERATING CURVE

Ambient Temperature °C

+ 85 °C

+ 100

+ 75

+ 50

+ 25

Percent of Rated Power

- 75 + 150+ 125+ 100+ 75+ 50+ 250- 25- 50 + 175

FIGURE 3 - 1240W 10 k

LOAD LIFE, 20 UNITS,

10 000 h at 0.25 W, + 85 °C (Wiper at CW)

+ 2000

+ 1500

+ 1000

+ 500

- 500

- 1000

- 1500

- 2000

ΔR/R (ppm)

Time (h)

0 2000 4000 8000 10 0006000

Accutrim™ 1240 (RJ26 Style)

Vishay Foil Resistors

Document Number: 63053 For any questions, contact: foil@vishaypg.com www.foilresistors.com

Revision: 23-Mar-10 3

Notes

(1)

Maximum is 1.0 % A.Q.L. standard for all specifications except

TCR. (For TCR information, see notes 2 and 3.)

(2)

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.)

(3)

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.

(4)

Derated linearly for full power at + 85 °C to zero power at

+ 150 °C. See Figure 2 on previous page.

(5)

Independent of resistance value. 3 Ω maximum available on

special request.

(6)

All ΔR’s are measured to the tolerance specified + 0.01 Ω.

(7)

Whichever is greater.

Special Available Options:

Special marking

Burn-in 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

TABLE 5 - COMPARISON

MIL-PRF-39035/3 CHARACTERISTIC H

(6)

MODEL 1240 MAXIMUM

TEST GROUP I

Conditioning

Contact resistance variation - CRV (noise)

Immersion

± 1.0 %

± 3.0 % or 3 Ω

(7)

No continuous stream of bubbles

± 0.5 %

3 Ω typical, 10 Ω maximum

No continuous stream of bubbles

TEST GROUP I a

Visual and mechanical

Actual effective electrical travel

End resistance

Dielectric withstanding voltage - DWV

Per MIL-STD-202, methods 301 and 105

Atmospheric pressure

Barometric pressure

Insulation resistance

Shaft torque

Thermal shock

Setting stability

No failures

10 to 25 turns

2 % or 2 Ω

(7)

600 V

, 1 min

250 V

, 1 min

≥ 1000 MΩ

3 oz. in. maximum

± 1.0 %

No failures

21 ± 2 turns

2 Ω for values ≤ 1 kΩ;

5 Ω for values ≥ 2 kΩ;

600 V

, 1 min

250 V

, 1 min

> 1000 MΩ

3 oz. in. maximum

± 0.5 %

TEST GROUP II

Solderability Per MIL-STD-202, method 208 Per MIL-STD-202, method 208

TEST GROUP III

Resistance temperature characteristic - TCR

Moisture resistance

Contact resistance variation - CRV (noise)

± 0.005 %/°C (± 50 ppm/°C)

± 1.0 %

3.0 % or 3 Ω

(7)

± 0.001 %/°C (± 10 ppm/°C)

± 0.5 %

3 Ω typical, 10 Ω maximum

TEST GROUP IV

Settability

Shock

Setting stability

Vibration

Setting stability

Contact resistance variation - CRV (noise)

Salt spray

± 1.0 %

3.0 % or 3 Ω

(7)

No corrosion

± 0.1 %

± 0.5 %

3 Ω typical, 10 Ω maximum

No corrosion

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

± 1.0 %

± 2.0 %

± 1.0 %

± 3.0 %

± 2.0 %

3 % or 3 Ω

(7)

No loosening or breakage

± 0.1 %

± 0.5 %

3 Ω typical, 10 Ω maximum

No loosening or breakage

TEST GROUP VI

Rotational life (200 cycles)

Contact resistance variation - CRV (noise)

Terminal strength

± 2.0 %

3 % or 3 Ω

(7)

2 lbs.

± 2.0 %

3 Ω typical, 10 Ω maximum

2 lbs.

TEST GROUP VII

Life (2000 h) at + 85 °C

Life (10 000 h) at + 85 °C

± 3.0 %

± 5.0 %

± 0.1 % typical, ± 1.0 % maximum

TEST GROUP VIII

Solvent resistance No failures No failures

P1-P3 P4-P5

Y40531K00000J0L

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Manufacturer:

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Description:

Trimmer Resistors - Through Hole 1Kohms 1/4w 5% 6.35mm sq seal

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Y40531K00000J0L

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