STE Series Current Sensing Resistor
The STE series are Metal Foil Current Sensing Resistors designed for precise current measurement. They offer various sizes and materials to suit different application needs.
Product Attributes
- Brand: STE Series
- Material: MnCu alloy, Alloy, Special
- Color: Green (Protective coating), Black (Marking coating)
- Certifications: UL-94-V0 (Flame-retardant epoxy)
Technical Specifications
| Part Number Series | Series Number | Material | Power Rating (Watt) | Resistance Value (m) | Resistance Tolerance (%) | TCR (ppm) | Dimensions (W x L x T) (mm) | Terminal Electrode (A) (mm) |
| STE0603 | 0.08x0.05 | M/A/S | 0.50 | R005~R060 | 0.5%(D) / 1%(F) | 50 / 100 | 0.900.20 x 1.700.20 x 0.650.20 | 0.500.20 / 0.400.20 |
| STE0805 | 0.08x0.05 | M/A/S | 0.75 | R003~R200 | 0.5%(D) / 1%(F) | 50 / 100 | 1.350.20 x 2.100.20 x 0.650.20 | 0.650.20 / 0.500.20 |
| STE1206 | 0.08x0.05 | M/A/S | 1.0 | R003~R400 | 0.5%(D) / 1%(F) | 50 / 100 | 1.700.20 x 3.300.20 x 0.650.20 | 1.200.30 / 0.680.30 |
| STE2010 | 0.08x0.05 | M/A/S | 1.5 | R002~R400 | 0.5%(D) / 1%(F) | 50 / 100 | 2.600.20 x 5.100.20 x 0.650.20 | 2.100.30 / 0.700.30 |
| STE2512 | 0.08x0.05 | M/A/S | 2.0 | R002~R400 | 0.5%(D) / 1%(F) | 50 / 100 | 3.200.30 x 6.400.30 x 0.650.20 | 2.800.30 / 2.600.30 / 1.050.30 |
| STE3921 | 0.08x0.05 | M/A/S | 3.0 | R002~R100 | 0.5%(D) / 1%(F) | 50 / 100 | 5.100.30 x 11.100.30 x 0.650.20 | 4.900.30 / 4.550.30 / 2.360.30 |
| STE4527 | 0.08x0.05 | M/A/S | 4.0 | R002~R100 | 0.5%(D) / 1%(F) | 50 / 100 | 7.101.0 x 11.601.0 x 0.650.30 | 5.000.40 / 2.700.40 |
Product Structure & Material
Substrate: Alumina Ceramic
Adhesion layer: Epoxy
Resistive element: Cu alloy
Terminal electrode: SnNiCu
Protective coating: Flame-retardant epoxy, meets UL- 94-V0 requirements (green)
Marking coating: Flame-retardant epoxy, meets UL- 94-V0 requirements (black)
Reliability Test Standard
| Parameter | Conditions | Requirements | IEC Standard |
| Short Time Over Load | P= 2.5Pr ; T=252C , t = 5sec. | (1.0%+0.5m) | 4.13 |
| High Temp. Exposure | T = +1702C ; t = 1000h | (1.0%+0.5m) | 4.25 |
| Low Temp. Storage | T = -552C ; t = 1000h | (1.0%+0.5m) | 4.25 |
| Moisture Load Life | 6095RH Vtest = Vmax ; T=602C ; RH=95% ; t= 90min ON , 30min OFF , 1000h | (2.0%+0.5m) | 4.25 |
| Thermal Shock | [-55C 30min. R.T. 3min. +155C 30min. R.T. 3min ], 100 | (1.0%+0.5m) | 4.19 |
| Load Life at 70C | Vtest = Vmax ; T=702C ;t= 90min ON , 30min OFF,1000h | (2%+0.5m) | 4.25 |
| Solderability | / Dip into solder at T = 2455C , t = 30.5sec. | /The covered area >95% | 4.17 |
| Resistance to Solder Heat | / Through Reflow T= 2755C , t =201sec. | (1.0%+0.5m) | 4.18 |
| Mechanical Shock | a =100G , t =11ms, 5 | (1.0%+0.5m) | 4.21 |
| Substrate Bending | / Span between fulcrums 90mm ; / Bend Width2mm ; /Test board/ Glass-Epoxy Board ; / Thickness =1.6mm | (1.0%+0.5m) | 4.33 |
Environmental Characteristic
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 30 days.
Recommended Solder Pad Size and Welding Conditions
| Part Number Series | P (mm) | W (mm) | D (mm) | Loading (W) |
| STE0603 | 0.50-0.60 | 0.92 | 1.35-1.30 | 0.50 |
| STE0805 | 0.50-0.80 | 1.44 | 1.55-1.40 | 0.75 |
| STE1206 | 0.60-1.20 | 1.84 | 2.10-1.80 | 1.0 |
| STE2010 | 0.70-2.70 | 2.88 | 3.65-2.65 | 1.5 |
| STE2512 | 0.60-3.10 | 3.57 | 4.35-3.10 | 2.0 |
| STE3921 | 1.10-5.00 | 5.75 | 6.45-4.50 | 3.0 |
| STE4527 | 1.20-5.20 | 8.05 | 6.65-4.65 | 4.0 |
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-STE2512A2W0R560F_C201343.pdf
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