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Specifications
Power(Watts):
1W
Resistance:
45mΩ
Type:
Current Sense Resistor
Tolerance:
±1%
Temperature Coefficient:
±50ppm/℃
Mfr. Part #:
STE1206M1W0R045F
Package:
1206
Key Attributes
Model Number:
STE1206M1W0R045F
Product Description
STE Series Current Sensing Resistors
The STE series offers high-performance metal foil current sensing resistors designed for accurate current measurement. These components are ideal for applications requiring precise current monitoring and control.
Product Attributes
- Brand: STE
- Material: Metal Foil (MnCu alloy, Alloy, Special)
- Substrate: Alumina Ceramic
- Protective Coating: Flame-retardant epoxy (UL-94-V0 compliant, Green)
- Marking Coating: Flame-retardant epoxy (UL-94-V0 compliant, Black)
Technical Specifications
| Part Number Series | Series Number | Material | Power Rating | Resistance Value | Resistance Tolerance | TCR (ppm) | Dimensions (W x L x T) (mm) | Terminal Electrode (A) (mm) |
| STE0603 | 0603 | M/A/S | 0.50W | R005~R60 (5~60m) | 0.5%(D), 1%(F) | 50, 100 | 0.900.20 x 1.700.20 x 0.650.20 | 0.400.20 / 0.500.20 |
| STE0805 | 0805 | M/A/S | 0.75W | R003~R200 (3~200m) | 0.5%(D), 1%(F) | 50, 100 | 1.350.20 x 2.100.20 x 0.650.20 | 0.500.20 / 0.650.20 |
| STE1206 | 1206 | M/A/S | 1.0W | R003~R400 (3~400m) | 0.5%(D), 1%(F) | 50, 100 | 1.700.20 x 3.300.20 x 0.650.20 | 0.680.30 / 1.200.30 |
| STE2010 | 2010 | M/A/S | 1.5W | R002~R400 (2~400m) | 0.5%(D), 1%(F) | 50, 100 | 2.600.20 x 5.100.20 x 0.650.20 | 0.700.30 / 2.100.30 |
| STE2512 | 2512 | M/A/S | 2.0W | R002~R400 (2~400m) | 0.5%(D), 1%(F) | 50, 100 | 3.200.30 x 6.400.30 x 0.650.20 | 1.050.30 / 2.600.30 / 2.800.30 |
| STE3921 | 3921 | M/A/S | 3.0W | R002~R100 (2~100m) | 0.5%(D), 1%(F) | 50, 100 | 5.100.30 x 11.100.30 x 0.650.20 | 2.360.30 / 4.550.30 / 4.900.30 |
| STE4527 | 4527 | M/A/S | 4.0W | R002~R100 (2~100m) | 0.5%(D), 1%(F) | 50, 100 | 7.101.0 x 11.601.0 x 0.650.30 | 2.700.40 / 5.000.40 |
Reliability Test Standards
| Test Method | Conditions | Requirements |
| Short Time Over Load | P=2.5Pr; T=252C, t=5sec. | (1.0%+0.5m) |
| High Temp. Exposure | T=+1702C, t=1000h | (1.0%+0.5m) |
| Low Temp. Storage | T=-552C, t=1000h | (1.0%+0.5m) |
| Moisture Load Life | (60, 95%RH) 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 70C | Vtest=Vmax; T=702C; t=90min ON, 30min OFF, 1000h | (2%+0.5m) |
| Solderability | Dip into solder at T=2455C, t=30.5sec. | The covered area >95% |
| Resistance to Solder Heat | Through Reflow T=2755C, t=201sec. | (1.0%+0.5m) |
| Mechanical Shock | Acceleration a=100G, Amplitude time t=11ms, 5 times shock | (1.0%+0.5m) |
| Substrate Bending | Span: 90mm; Bend Width: 2mm; Test board: Glass-Epoxy Board; Thickness=1.6mm | (1.0%+0.5m) |
Environmental Characteristics
- Operating Temperature Range: -55 to 155
- Storage Conditions:
- Under airtight at +10 to +40, RH 75% for 2 years.
- Without dew at +10 to +60, RH 95% for 30 days.
Recommended Solder Pad Dimensions (mm)
| Part Number Series | P | W | D |
| STE0603 | 0.60 | 0.92 | 1.30 |
| STE0805 | 0.80 | 1.44 | 1.40 |
| STE1206 | 1.20 | 1.84 | 1.80 |
| STE2010 | 2.70 | 2.88 | 2.65 |
| STE2512 | 3.10 | 3.57 | 3.10 |
| STE3921 | 5.00 | 5.75 | 4.50 |
| STE4527 | 5.20 | 8.05 | 4.65 |
Recommended Soldering Parameters
Wave Solder Temperature Profile:
Preheating: 100~130, max. 100 sec.
Soldering: 250~265 max. 10 sec.
Maximum Temperature: 2605, max. 10sec.
Solder Reflow Temperature Profile:
Preheating: 145 15, max. 120 sec.
Soldering: min. 220, max. 60 sec.
Maximum Temperature: 2605, max. 10sec.
2410121318_Walter-Elec-STE1206M1W0R045F_C201299.pdf
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