Current Sense Resistors - SMD

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OARS Open Air Sense Resistors

IRC / TT Electronics OARS Open Air Sense Resistors are rated for 1W at 85°C (2W at 25°C) with resistance values from 0.002Ω to 0.05Ω with tolerances down to +1%. They feature TCRs as low as +20ppm/°C and inductance values in the single‐digit nanohenry range. Operating range is ‐40°C to +125°C. IRC / TT Electronics OARS Open Air Sense Resistors offer compliant terminations that allow them to expand and contract with the PC board's thermal cycling, enabling them to meet or exceed the 1000-2000 cycles required by most automotive manufacturers. This thermal cycling stresses the solder joints of conventional flat chip resistors, which can often cause failure. The unique lead form of the OARS resistors provides an inherent advantage in compliance to the mechanical stress caused by thermal cycling. The welded copper terminals in the OARS Open Air Sense Resistors also provide a low resistance terminal to enhance reliable performance for demanding applications.

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Part #

Current Sense Resistors - SMD 2W 1%

OARS1R010FLF
BI Technologies / TT Electronics
1: $2.040
3.800Expected 2/12/2027

Mfr. Part #
OARS1R010FLF

Mouser Part #
66-OARS1R010FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 1%

Learn More

Datasheet

3.800Expected 2/12/2027

Cut Tape

$2.040

$1.178

$960

$718

Reel

$510

View

MouseReel Available

Min.: 1
Mult.: 1

: 1.900

Reel, Cut Tape, MouseReel

OARS

10 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .025 OHM 1W 1%

OARS1R025FTR-LF
BI Technologies / TT Electronics
1: $2.051
3.755Expected 2/26/2027

Mfr. Part #
OARS1R025FTR-LF

Mouser Part #
66-OARS1R025FTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .025 OHM 1W 1%

Learn More

Datasheet

3.755Expected 2/26/2027

Cut Tape

$2.051

$1.188

$961

$719

View

Reel

$505

MouseReel Available

Min.: 1
Mult.: 1

: 1.900

Reel, Cut Tape, MouseReel

OARS

25 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 30 mOhms '1%

OARS1R030FLF
BI Technologies / TT Electronics
1: $1.504
3.648Expected 12/11/2026

Mfr. Part #
OARS1R030FLF

Mouser Part #
66-OARS1R030FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 30 mOhms '1%

Datasheet

3.648Expected 12/11/2026

Cut Tape

$1.504

$1.020

$898

$820

$505

Reel

$505

MouseReel Available

Min.: 1
Mult.: 1

: 1.900

Reel, Cut Tape, MouseReel

OARS

30 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 0.05 OHM 1%

OARS1R050FLF
BI Technologies / TT Electronics
1: $1.493
17.713On Order

Mfr. Part #
OARS1R050FLF

Mouser Part #
66-OARS1R050FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 0.05 OHM 1%

Learn More

Datasheet

17.713On Order

Cut Tape

$1.493

$919

$753

$650

View

Reel

$404

MouseReel Available

Min.: 1
Mult.: 1

: 1.900

Reel, Cut Tape, MouseReel

OARS

50 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 3W 0.004 ohm 1%

OARS3R004FLF
BI Technologies / TT Electronics
1: $2.566
2.800Expected 10/2/2026

Mfr. Part #
OARS3R004FLF

Mouser Part #
66-OARS3R004FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 3W 0.004 ohm 1%

Learn More

Datasheet

2.800Expected 10/2/2026

Cut Tape

$2.566

$1.567

$1.441

$1.136

View

Reel

$681

MouseReel Available

Min.: 1
Mult.: 1

: 1.900

Reel, Cut Tape, MouseReel

OARS

4 mOhms

3 W

1 %

40 PPM / C

11.56 mm (0.455 in)

3.56 mm (0.14 in)

3.51 mm (0.138 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .0025 OHM 1%

OARSXPR0025FLF
BI Technologies / TT Electronics
1: $3.239
3.987On Order

Mfr. Part #
OARSXPR0025FLF

Mouser Part #
66-OARSXPR0025FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .0025 OHM 1%

Learn More

Datasheet

3.987On Order

Cut Tape

$3.239

$1.904

$1.651

$1.535

View

Reel

$1.049

MouseReel Available

Min.: 1
Mult.: 1

: 1.200

Reel, Cut Tape, MouseReel

OARS

2.5 mOhms

5 W

1 %

40 PPM / C

12 mm (0.472 in)

6.35 mm (0.25 in)

4.57 mm (0.18 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .020 OHM 1%

OARSXPR020FLF
BI Technologies / TT Electronics
1: $2.629
2.400Expected 1/8/2027

Mfr. Part #
OARSXPR020FLF

Mouser Part #
66-OARSXPR020FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .020 OHM 1%

Learn More

Datasheet

2.400Expected 1/8/2027

Cut Tape

$2.629

Reel

$833

MouseReel Available

Min.: 1
Mult.: 1

: 1.200

Reel, Cut Tape, MouseReel

OARS

20 mOhms

5 W

1 %

40 PPM / C

12 mm (0.472 in)

6.35 mm (0.25 in)

4.57 mm (0.18 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 0.01 ohm 1% 2W Sense Resistor

OARS1-R010FI
BI Technologies / TT Electronics
1: $2.040
3.550Expected 12/11/2026

Mfr. Part #
OARS1-R010FI

Mouser Part #
756-OARS1-R010FI

BI Technologies / TT Electronics

Current Sense Resistors - SMD 0.01 ohm 1% 2W Sense Resistor

Datasheet

3.550Expected 12/11/2026

Cut Tape

$2.040

$1.178

$960

$718

Reel

$510

View

MouseReel Available

Min.: 1
Mult.: 1

: 1.900

Reel, Cut Tape, MouseReel

OARS

10 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 55 C

+ 160 C

Metal Element

2 Terminal

SMD/SMT

Current Sense Resistors - SMD 0.02 ohm 1% 2W Sense Resistor

OARS1-R020FI
BI Technologies / TT Electronics
1: $2.051
3.773Expected 10/2/2026

Mfr. Part #
OARS1-R020FI

Mouser Part #
756-OARS1-R020FI

BI Technologies / TT Electronics

Current Sense Resistors - SMD 0.02 ohm 1% 2W Sense Resistor

Datasheet

3.773Expected 10/2/2026

Cut Tape

$2.051

$1.178

$961

$720

View

Reel

$505

MouseReel Available

Min.: 1
Mult.: 1

: 3.800

Reel, Cut Tape, MouseReel

OARS

20 mOhms

2 W

1 %

20 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 55 C

+ 160 C

Metal Element

2 Terminal

SMD/SMT

Current Sense Resistors - SMD 3W 0.010 ohm 1%

OARS3R010FLF
BI Technologies / TT Electronics
1: $1.988
792Expected 8/24/2026

Mfr. Part #
OARS3R010FLF

Mouser Part #
66-OARS3R010FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 3W 0.010 ohm 1%

Learn More

Datasheet

792Expected 8/24/2026

Cut Tape

$1.988

$1.430

$1.357

$1.252

$833

Reel

$833

MouseReel Available

Min.: 1
Mult.: 1

: 1.900

Reel, Cut Tape, MouseReel

OARS

10 mOhms

3 W

1 %

40 PPM / C

11.56 mm (0.455 in)

3.56 mm (0.14 in)

3.51 mm (0.138 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 0.002 Ohms 1%

OARS1R002FLF
BI Technologies / TT Electronics
3.800: $541
Non-Stocked

Mfr. Part #
OARS1R002FLF

Mouser Part #
66-OARS1R002FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 0.002 Ohms 1%

Datasheet

Non-Stocked

Cut Tape

$541

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

2 mOhms

2 W

1 %

240 PPM / C

11.56 mm (0.455 in)

3.56 mm (0.14 in)

3.51 mm (0.138 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 2 mOhms '5%

OARS1R002JLF
BI Technologies / TT Electronics
3.800: $555
Non-Stocked

Mfr. Part #
OARS1R002JLF

Mouser Part #
66-OARS1R002JLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 2 mOhms '5%

Datasheet

Non-Stocked

Cut Tape

$555

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

2 mOhms

2 W

5 %

240 PPM / C

11.56 mm (0.455 in)

3.56 mm (0.14 in)

3.51 mm (0.138 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 1W 0.004 1%

OARS1R004FLF
BI Technologies / TT Electronics
3.800: $471
Non-Stocked

Mfr. Part #
OARS1R004FLF

Mouser Part #
66-OARS1R004FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 1W 0.004 1%

Learn More

Datasheet

Non-Stocked

Cut Tape

$471

$465

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

4 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 4 mOhms '5%

OARS1R004JLF
BI Technologies / TT Electronics
3.800: $447
Non-Stocked

Mfr. Part #
OARS1R004JLF

Mouser Part #
66-OARS1R004JLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 4 mOhms '5%

Datasheet

Non-Stocked

Cut Tape

$447

$442

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

2 W

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .005 OHM 1W 5%

OARS1R005JTR-LF
BI Technologies / TT Electronics
3.800: $364
Non-Stocked

Mfr. Part #
OARS1R005JTR-LF

Mouser Part #
66-OARS1R005JTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .005 OHM 1W 5%

Learn More

Datasheet

Non-Stocked

Cut Tape

$364

$344

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

5 mOhms

2 W

5 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .01 OHM 1W 5%

OARS1R010JTR-LF
BI Technologies / TT Electronics
3.800: $312
Non-Stocked

Mfr. Part #
OARS1R010JTR-LF

Mouser Part #
66-OARS1R010JTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .01 OHM 1W 5%

Learn More

Datasheet

Non-Stocked

Cut Tape

$312

$292

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

10 mOhms

2 W

5 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 1W 0.015 5%

OARS1R015JLF
BI Technologies / TT Electronics
3.800: $380
Non-Stocked

Mfr. Part #
OARS1R015JLF

Mouser Part #
66-OARS1R015JLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 1W 0.015 5%

Learn More

Datasheet

Non-Stocked

Cut Tape

$380

$368

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

15 mOhms

2 W

5 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .015 OHM 1W 5%

OARS1R015JTR-LF
BI Technologies / TT Electronics
3.800: $312
Non-Stocked

Mfr. Part #
OARS1R015JTR-LF

Mouser Part #
66-OARS1R015JTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .015 OHM 1W 5%

Learn More

Datasheet

Non-Stocked

Cut Tape

$312

$292

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

15 mOhms

2 W

5 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 22 mOhms '1%

OARS1R022FLF
BI Technologies / TT Electronics
3.800: $433
Non-Stocked

Mfr. Part #
OARS1R022FLF

Mouser Part #
66-OARS1R022FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 22 mOhms '1%

Datasheet

Non-Stocked

Cut Tape

$433

$421

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

2 W

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .022 OHM 1W 1%

OARS1R022FTR-LF
BI Technologies / TT Electronics
3.800: $330
Non-Stocked

Mfr. Part #
OARS1R022FTR-LF

Mouser Part #
66-OARS1R022FTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .022 OHM 1W 1%

Learn More

Datasheet

Non-Stocked

Cut Tape

$330

$310

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

22 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 22 mOhms '5%

OARS1R022JLF
BI Technologies / TT Electronics
3.800: $406
Non-Stocked

Mfr. Part #
OARS1R022JLF

Mouser Part #
66-OARS1R022JLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 22 mOhms '5%

Datasheet

Non-Stocked

Cut Tape

$406

$394

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

2 W

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 25 mOhms '5%

OARS1R025JLF
BI Technologies / TT Electronics
3.800: $406
Non-Stocked

Mfr. Part #
OARS1R025JLF

Mouser Part #
66-OARS1R025JLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 25 mOhms '5%

Datasheet

Non-Stocked

Cut Tape

$406

$394

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

2 W

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .03 OHM 1W 1%

OARS1R030FTR-LF
BI Technologies / TT Electronics
1: $1.956
Non-Stocked Lead-Time 38 Weeks

Mfr. Part #
OARS1R030FTR-LF

Mouser Part #
66-OARS1R030FTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .03 OHM 1W 1%

Learn More

Datasheet

Non-Stocked Lead-Time 38 Weeks

Cut Tape

$1.956

$1.125

$816

$604

View

Reel

$465

MouseReel Available

Min.: 1
Mult.: 1

: 1.900

Reel, Cut Tape, MouseReel

OARS

30 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .030 OHM 5%

OARS1R030JLF
BI Technologies / TT Electronics
3.800: $380
Non-Stocked

Mfr. Part #
OARS1R030JLF

Mouser Part #
66-OARS1R030JLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .030 OHM 5%

Learn More

Datasheet

Non-Stocked

Cut Tape

$380

$373

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

30 mOhms

2 W

5 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .03 OHM 1W 5%

OARS1R030JTR-LF
BI Technologies / TT Electronics
3.800: $312
Non-Stocked

Mfr. Part #
OARS1R030JTR-LF

Mouser Part #
66-OARS1R030JTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .03 OHM 1W 5%

Learn More

Datasheet

Non-Stocked

Cut Tape

$312

$292

Min.: 3.800
Mult.: 1.900

: 1.900

Reel

OARS

30 mOhms

2 W

5 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

OARS Open Air Sense Resistors

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