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Current sensing resistor Walter Elec STE2512S2W0R300F with UL94V0 certified green and black coatings

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Current sensing resistor Walter Elec STE2512S2W0R300F with UL94V0 certified green and black coatings

Resistance : 300mΩ

Power(Watts) : 2W

Type : Current Sense Resistor

Tolerance : ±1%

Description : 300mΩ ±1% 2W

Mfr. Part # : STE2512S2W0R300F

Model Number : STE2512S2W0R300F

Package : 2512

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Product Overview

The STE series current sensing resistors are metal foil components designed for accurate current measurement. They offer various sizes, materials, and resistance values, making them suitable for a wide range of applications requiring precise current monitoring.

Product Attributes

  • Brand: STE series
  • Material: MnCu alloy, Alloy, Special
  • Protective Coating Color: Green (UL-94-V0), Black (UL-94-V0)
  • Certifications: UL-94-V0 (for protective coatings)

Technical Specifications

Part Number SeriesResistance Value (m)Power Rating (Watt)Resistance Tolerance (%)TCR (ppm)Dimensions (W x L x T, mm)Terminal Electrode (A, mm)
STE0603*W50-seriesR005~R600.50.5% (D) / 1% (F)50 / 1000.900.20 x 1.700.20 x 0.650.200.500.20 (R005), 0.400.20 (R006*S~R060)
STE0805*W75-seriesR003~R2000.750.5% (D) / 1% (F)50 / 1001.350.20 x 2.100.20 x 0.650.200.650.20 (R003), 0.500.20 (R004*S~R200)
STE1206*1W0-seriesR003~R4001.00.5% (D) / 1% (F)50 / 1001.700.20 x 3.300.20 x 0.650.201.200.30 (R003), 0.680.30 (R004*S~R400)
STE2010*1W5-seriesR002~R4001.50.5% (D) / 1% (F)50 / 1002.600.20 x 5.100.20 x 0.650.202.100.30 (R002~R003), 0.700.30 (R004*S~R400)
STE2512*2W0-seriesR002~R4002.00.5% (D) / 1% (F)50 / 1003.200.30 x 6.400.30 x 0.650.202.800.30 (R002), 2.600.30 (R003), 1.050.30 (R004*S~R400)
STE3921*3W0-seriesR002~R1003.00.5% (D) / 1% (F)50 / 1005.100.30 x 11.100.30 x 0.650.204.900.30 (R002), 4.550.30 (R003), 2.360.30 (R004*S~R100)
STE4527*4W0-seriesR002~R1004.00.5% (D) / 1% (F)50 / 1007.101.0 x 11.601.0 x 0.650.305.000.40 (R002), 2.700.40 (R003*S~R100)

Product Structure & Material

ComponentMaterial
SubstrateAlumina Ceramic
Adhesion layerEpoxy
Resistive elementCu alloy
Terminal electrodeSnNiCu
Protective coatingFlame-retardant epoxy, meets UL- 94-V0 requirements (green)
Marking coatingFlame-retardant epoxy, meets UL- 94-V0 requirements (black)

Reliability Test Standards

Test MethodConditionsRequirements
Short Time Over LoadP= 2.5Pr ; T=252C , t = 5sec.(1.0%+0.5m)
High Temp. ExposureT = +1702C ; t = 1000h(1.0%+0.5m)
Low Temp. StorageT = -552C ; t = 1000h(1.0%+0.5m)
Moisture Load Life6095RH Vtest = Vmax ; T=602C ; RH=95% ; t= 90min ON , 30min OFF , 1000h(2.0%+0.5m)
Thermal Shock[-55C 30min. R.T. 3min. +155C 30min. R.T. 3min ], 100 Cycles(1.0%+0.5m)
Load Life at 70CVtest = Vmax ; T=702C ;t= 90min ON , 30min OFF,1000h(2%+0.5m)
SolderabilityDip into solder at T = 2455C , t = 30.5sec.The covered area >95%
Resistance to Solder HeatThrough Reflow T= 2755C , t =201sec.(1.0%+0.5m)
Mechanical Shocka =100G , t =11ms, 5 times shock(1.0%+0.5m)
Substrate BendingSpan:90mm ; Bend Width:2mm ; Test board: Glass-Epoxy Board ; Thickness =1.6mm(1.0%+0.5m)

Environmental Characteristics

Operating Temperature: -55155

Storage Conditions:

  • Under airtight in temperature+1040, relative humidity 75% can store 2 years.
  • Without dew in temperature+1060, relative humidity be 95% maximum value for 30days.

Recommended Solder Pad Size and Welding Conditions

Part Number SeriesP (mm)W (mm)D (mm)Loading (Watt)
STE0603MW50-series0.500.921.350.50w
STE0603MW50-series0.600.921.300.50w
STE0805MW75-series0.501.441.550.75w
STE0805MW75-series0.801.441.400.75w
STE1206M1W0-series0.601.842.101.0w
STE1206M1W0-series1.201.841.801.0w
STE2010M1W5-series0.702.883.651.5w
STE2010M1W5-series2.702.882.651.5w
STE2512M2W0-series0.603.574.352.0w
STE2512M2W0-series0.903.574.202.0w
STE2512M2W0-series3.103.573.102.0w
STE3921M3W0-series1.105.756.453.0w
STE3921M3W0-series1.705.756.153.0w
STE3921M3W0-series5.005.754.503.0w
STE4527M4W0-series1.208.056.654.0w
STE4527M4W0-series5.208.054.654.0w

Recommended Customer Soldering Parameters:

Wave Solder Temperature Condition:

  • Preheating: 100~130, max.100 sec.
  • Soldering: 250~265 max. 10 sec.
  • Maximum temperature: 2605, max. 10sec.

Solder Reflow Temperature Condition:

  • Preheating: 145 15, max.120 sec.
  • Soldering: min. 220, max. 60 sec.
  • Maximum temperature: 2605, max. 10sec.

2410121318_Walter-Elec-STE2512S2W0R300F_C201333.pdf


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