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SurfRaecesiMstoournst Sense Resistors
Surface Mount Sense Resistors
OAFRleOSxSA,ibRuOSle,rAOfleaARaRcdSSes--XXfPoM,PrO,otAhORueSrAnZmSRtaelSrSieeZexs pnSasneesriioeRns esistors
VOEZealperl eumOone-FVOeAo-lsapeanhlRxeuidtrminebSoT-dslaweC,6edir5OnlRosedAwiatgAe±donjns2Rsuit10gfmorSnompe1rpp-drmeXtemuhdriPcelu/lºrveic,oCmeeshOsramPslPAieCCoRxBBnpShahneZeasiatoSitnniegnrgies
RoH STCcFRoletmoxip±b4lie0aplneptamd/s°Cfo(Er ltehmeermntaTlCeRxp±2a0npspiomn/°C)
ZeOrop-oehnm-ai6r5dAesjuigmnpererdvuercseiosnPCB heating
Values down to 1m
Electri••calEZDeleramot-eaonhtmTC65RA±j2u0mpppemr/ºvCersion
RoHS compliant
All parts are Pb-OfreAe aRndSco1m/p3ly with EU Directive 2011/65/EU ameOndAedRbyS(E-UX) 2P015/863 (RoHS3)
Power rating at 25ºC
PRoewsiestrarnaEEctllieenegccrattanrrtiigcc8eaa5llºCDDaattaa
ResistanPcoewTerorleatrianngce
StandarPadto7Vw0a°eClruaremastbiinegnt,aotr 21450°°CC
(Enquire fPoterormuwnineliasrltetreadmtvipnaeglruaeatustr)e85ºC
InductanRRceeessiissttaannccee rraannggee
watts
2
4
watts
1
2
ohms
%
ORA0R0S21OtoARR0S501R002: 5O, A>RRS0032: 1, 5 RO00A1RtOoSAR-XR0P2S5-XP
milliohmswwat2tts,s 3, 4, 5, 10, 125, 20, 222, 25, 30, 40, 503
1, 2, 2.5, 5, 74.5, 150, 20, 25
watts
1
2
nHoohhmmss
R002 to RR000520 to R050 R00<21t0o R015
R001Rto00R10t2o5R025
AmbientRRteeessmiisspttaaennrccaeetuTTreoolleerarraannngcceee
°C %%
Staannddaarrdd VVaalluueess
((EEnnqquuiirree ffoorr uunnlliisstteedd vvaalluueess))
mmiilllliioohhmmss
Current Irnadtuincgtaantce25ºC
amps nH
Current Aramtibnigenat tte8mpCerature range amps °C
RR00-050252::t5o5,,+>>1RR60000022:: 11,, 55
22, ,2332,,,442,,555,,,O31100A0,,,41R1055S,,,52-20010,Z,22, 25, 320,,34,04,, 550, 10, 151, 2, 2C.5o, m511,,2m72..5,5e,2,1n.1500t,,,s522,007,,.2525,5
65 <<1100
46
--5555 ttoo ++116600
Zero-ohm jumper
Ambient temperature range
°C
-55OtoA+R1OS60A-1RZS-1Z
ComCmoemnmtsents
PhysicCCCMauuualrrrxrrrDeeernnneatttstirrrdaaaautttiiiannnlgggreaaasttt2is825t55°aC°°nCCacmebient
amps
millioahmmpss
DimensiAAommnsbbii(eemnnttmttee)mmapnpeedrraarettuucrroeemrraamnngegeended solde°°rCCpads
65 65
46 0.3
-55 to-5+516to0+160
Zero-Zoehrmo-jouhmmpejurmper
Type Physical Data L H T D
OARS1/DT3eim>meRpn0se0iro3an,tsuO(rmAemRDS)ea-r1naZdtinregc1o1m.1m8ended±3s0.0o.75l6der pads
4.83
OARS1/T3y-pRe 003
OARS1 >R003,
OARS1/3 - R002
OARS1-R003
OARS-XP
OARS1-R002
* Dependent on ohmic value
±0.38 L
H
OARS-11Z1.5611.18±30.5.716±30.0.756
±0.38 ±0.38
1102.7.0t*o11.5624.2.587t*o±30.5.716
±0.38
T
2.36
±0.25
2.36
±0.25
±0.76D
4.74.83
±0.7±60.76
4.83
±0.764.7
±0.76
OARS-XP
10.7 to 2.28 to
12.0* 4.57*
4.83
±0.76
W a nom. b nom. c nom. d nom.
3.18
±0.3W8
3.536.18
±0.±308.38
6.35
±0.338.56
±0.38
6.01
±0.38
4a.0n7om.
4.44.507
7.24
4.45
b9.n3o7m.
9.37
9.58
c3n.0o7m.
3.07
3.18
d nom.
3.23
3.23
7.24 9.58 3.18
* Dependent on ohmic value
OARS1/3/XP
b
OARSZ
cdc
b
ac d c
a
Note: For OARS1/3/XP this relates to power rating, for OARSZ it relates to current rating.
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
BI Technologies IRC Welwyn
www.ttelectronics.com/res0is7to.r1s 1
0097..1181

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Surface Mount
SSenusrfeaRceesMisotournst Sense Resistors
OOAARSR,SO,AORSA-RXPS, -OXAPR,SOZ ASeRrSieZs Series
ElePctreicrafloDramtaance Data (AEC-Q200)
Power rating
OAORASR1S1/3
OA<RRS0304
at 70°C ambient, or 140°C
terminal temperature
watts OA2 RS-XP
<3R002
ResiTstCanRce(r-a5ng5eto 125ºC) ohms
R002 topRp0m50/ºC
R002 to2R40015
ResiTsthanecremTaollerSanhcoeck
%
R%
S(EtnaqnuHdireaigrfodhr VunaTlilsueteemdsvaplu.esE) xposumreillio(1hm2s5ºC2),232,, 42,55, ,3100, ,4105,R,520%0,
InduTcteanmcep. Cycling (-40 to 12n5HºC)
R%
R002: 5, >0R.70052: 1, 5
2, 3, 4, 51, .170,515
<10 1
AmbOienptetermaptieorantaurleLraifnege
°C
R%
-55 to +1260
Biased Humidity
CurrMenet rcahtinagnaitc2a5°lCSamhboienct k
amps
RO%ARS-1Z
R% 65
0.75
1.5
MAmaxbVTireeeinsbtridrmteaumaitnilporaeenrslaisStutarternecreannggeth
milliohms
°C
R-%55
0.3
to +160
1
Solvent Resistance
TemSpoelrdateurraebDileitryating
OARSR-X0P04 to R015
5 R002 to R007
R001 to R025 40
0.75
1, 2, 2.5, 5, 7.5,
12.5, 10, 20, 25
0.5
1
1
Comments 0.5
1
Zero-ohm jumper 1
Meets JIS-C-6429
Meets MIL-STD-002 Method 215
Meets J-STD-002 Method B
>R015
>R007
40
0.75
1
0.75
1
0.5
1
1
Tem perature Derating
Pulse Energy Rating
120
100
80
OARS1/3/XP
60 OARSZ
40
20
Note: Fo0r OARS1/3/XP this relates to power rating, for OARSZ it relates to current rating.
0 25 50 75 100 125 150 175
Am bient Tem perature (Deg C)
Note: For OARS-1Z the above derating graph may be applied to
the square of the current rating.
120
100
80
60
40
20
0
1
10
Value (m illiohm s)
100
OARS1/3
OARS-XP
Note: This graph relates to single pulses of short duration (100ms).
Higher energy limits apply for longer pulses and overloads
Hot Spot Temperature Rise
7.6m m x 7.6m m pads, 2 oz copper on FR4, still air
Joint Temperature Rise
7.6mm x 7.6mm pads, 2 oz copper on FR4, still air
300
250
200
150
100
50
0
25%
50%
75%
Proportion of Rated Power
Value in m illiohm s
OARS1/3 / OARS-XP
50 / 25
30 / 15
10 / 5
5/ -
100%
100
80
60
40
20
0
25%
50%
75%
Proportion of Rated Power
Value in milliohms
OARS1/3 / OARS-XP
5/-
10 / 5
30 / 15
50 / 25
100%
Note: Temperature rise data are given here for typical mounting conditions. Actual figures depend on PCB copper weight, mounting pad size, track
width and substrate type. Also, the open air format responds better to forced air cooling than chip format resistors. For values below 5 milliohms
allowance should be made for heat generated in the copper tracks themselves. Application-specific guidance is available on request.
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
07.11
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
09.18

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Surface Mount
Sense Resistors
OARS, OARS-XP, OARSZ Series
Thermal Performance Examples
OARS1-R005 at 2W
OARSXP-R0025 at 5W
These thermal images were taken under ambient conditions of still air at 25°C with the components
mounted on horizontal standard test boards as defined below.
JEDEC standard circuit board:
2” (50.8mm) square FR4
2 outer power planes, 2 ounce (70μ) Cu
1” (25.4mm) square exposed
2 inner signal planes, 1 ounce (35μ) Cu
(continuous planes)
In contrast to the flat chip format, the OARS format keeps the hot spot thermally distant from the
solder j oints and reduces undesirable heat delivery into the PCB. Further thermal images for other
ohmic values and power dissipations are available on request.
Kelvin (4 Terminal) Mounting
For high precision applications a Kelvin (4
Terminal) mounting method is
recommended. An example to illustrate the
design principle is shown. High current
connections are made to the two pairs of
larger pads, whilst the voltage sense
connections are made to the two smaller
central pads.
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
09.18

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Surface Mount
Sense Resistors
OARS, OARS-XP, OARSZ Series
Standard 4-Terminal Probe Positions for Measuring Unmounted Parts
Standard 4-Terminal Probe Positions for Measuring Unmounted Parts
0.79
0.79
6.35
6.35
1.27
1.27
Surface Mount Sense Resistors
OARS, OARS-XP, OARSZ Series
7.94
7.94
Ø 0.76
Ø 0.76
All dimensions in mm
All dimensions in mm
Construction
Copper terminations are welded to resistance alloy strip which is then formed. Value adjustment is achieved
by control of width, without the need for subsequent abrasion or notch trimming.
Pb-free termination finish is 96% Sn / 4% Ag alloy.
Flammability
The resistor will not burn or emit incandescent particles under any condition of applied temperature or overload.
Marking
The parts are legend marked with ohmic value and tolerance code.
Packaging Data
Dimensions (mm)
Type
OARS1/3, OARS-1Z
OARS-XP-R001
OARS-XP >R001
A
4.32±0.08
7.21±0.1
B
11.7±0.08
11.94±0.1
11.56±0.1
C
24±0.3
DE
11.5±0.1 1.75±0.1
F
8±0.1
12±0.1
G
4±0.1
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
09.18

No Preview Available !

Surface Mount
Sense Resistors
OARS, OARS-XP, OARSZ Series
OOrdrdereinrgiPnrgocePdruorecedure
This product has two valid part numbers:
European (Welwyn) Part Numbers: OARS1-R01JI (OARS1, 10 milliohms ±5%, Pb-free)
OARS-1Z (OARS-1Z, Pb-free)
OARS 1
1
- R01J I
2 34
12 3
4
Type
Value
Tolerance Termination & Packing
OARS1
3-5 characters
OARS3 See Electrical Data
OARS-XP
R = ohms
F = ±1%
J = ±5%
I = Pb-free, Tape & Reel
OARS1, OARS3 1900/reel
OARS-XP 1200/reel
OARS - 1 Z
1
1
Type
OARS-1Z No value or tolerance applies. Termination is Pb-free. Packing is Tape & Reel, 1900/reel.
USA (IRC) Part Numbers:
OARS 1
1
OARS1R010JLF (OARS1, 10 milliohms ±5%, Pb-free)
OARS-1ZLF (OARS-1Z, Pb-free)
R0 1 0 J LF
2 34
12 3
4
Type
Value
Tolerance Termination & Packing
OARS1
4/5 characters
OARS3 See Electrical Data
OARS-XP
R = ohms
F = ±1%
J = ±5%
LF = Pb-free
OARS1, OARS3 1900/reel
OARS-XP 1200/reel
OARS - 1 Z L F
12
1
Type
OARS-1Z
No value or tolerance applies.
2
Termination & Packing
LF= Pb-free, Tape & Reel, 1900/reel.
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
09.18