Product Overview
The STE series offers metal foil current sensing resistors designed for accurate current measurement. These resistors are suitable for various applications requiring precise current detection and monitoring.
Product Attributes
- Brand: STE Series
- Material: Metal Foil (MnCu alloy, Alloy, Special)
- Color: Green (protective coating), Black (marking coating)
- Certifications: UL-94-V0 (protective and marking coatings)
Technical Specifications
| Series | Part Number Range | Resistance Value (m) | Power Rating (Watt) | Resistance Tolerance (%) | TCR (ppm) | Dimensions (W x L x T) (mm) | Terminal Electrode (A) (mm) |
| STE0603 | STE0603MW50-series R005~R060 | 5~60 | 0.50 | 0.5%(D), 1%(F) | 50, 100 | 0.900.20 x 1.700.20 x 0.650.20 | 0.500.20 (R005), 0.400.20 (R006*S~R060) |
| STE0805 | STE0805MW75-series R003~R200 | 3~200 | 0.75 | 0.5%(D), 1%(F) | 50, 100 | 1.350.20 x 2.100.20 x 0.650.20 | 0.650.20 (R003), 0.500.20 (R004*S~R200) |
| STE1206 | STE1206M1W0-series R003~R400 | 3~400 | 1.0 | 0.5%(D), 1%(F) | 50, 100 | 1.700.20 x 3.300.20 x 0.650.20 | 1.200.30 (R003), 0.680.30 (R004*S~R400) |
| STE2010 | STE2010M1W5-series R002~R400 | 2~400 | 1.5 | 0.5%(D), 1%(F) | 50, 100 | 2.600.20 x 5.100.20 x 0.650.20 | 2.100.30 (R002~R003), 0.700.30 (R004*S~R400) |
| STE2512 | STE2512M2W0-series R002~R400 | 2~400 | 2.0 | 0.5%(D), 1%(F) | 50, 100 | 3.200.30 x 6.400.30 x 0.650.20 | 2.800.30 (R002), 2.600.30 (R003), 1.050.30 (R004*S~R400) |
| STE3921 | STE3921M3W0-series R002~R100 | 2~100 | 3.0 | 0.5%(D), 1%(F) | 50, 100 | 5.100.30 x 11.100.30 x 0.650.20 | 4.900.30 (R002), 4.550.30 (R003), 2.360.30 (R004*S~R100) |
| STE4527 | STE4527M4W0-series R002~R100 | 2~100 | 4.0 | 0.5%(D), 1%(F) | 50, 100 | 7.101.0 x 11.601.0 x 0.650.30 | 5.000.40 (R002), 2.700.40 (R003*S~R100) |
Product Structure & Material
Substrate: Alumina Ceramic; Adhesion layer: Epoxy; Resistive element: Cu alloy; Terminal electrode: SnNiCu; Protective coating: Flame-retardant epoxy (UL-94-V0, Green); Marking coating: Flame-retardant epoxy (UL-94-V0, Black).
Reliability Test Standards
| 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 Cycles | (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 times shock | (1.0%+0.5m) | 4.21 |
| Substrate Bending | Span:90mm ; Bend Width:2mm ; Test board: Glass-Epoxy Board ; Thickness =1.6mm | (1.0%+0.5m) | 4.33 |
Environmental Characteristics
Operating Temperature: -55155. Storage Conditions: 2 years under airtight conditions (+1040, 75% RH); Max. 30 days without dew (+1060, 95% RH).
Recommended Solder Pad Size and Welding Conditions
| Part Number | P (mm) | W (mm) | D (mm) | Loading (Watt) |
| STE0603MW50-series R005 | 0.50 | 0.92 | 1.35 | 0.50w |
| STE0603MW50-series R006*S~R009*S | 0.60 | 0.92 | 1.30 | 0.50w |
| STE0603*W50-series R010~R60 | 0.60 | 0.92 | 1.30 | 0.50w |
| STE0805MW75-series R003 | 0.50 | 1.44 | 1.55 | 0.75w |
| STE0805MW75-series R004*S~R007*S | 0.80 | 1.44 | 1.40 | 0.75w |
| STE0805*W75-series R008~R200 | 0.80 | 1.44 | 1.40 | 0.75w |
| STE1206M1W0-series R003 | 0.60 | 1.84 | 2.10 | 1.0w |
| STE1206M1W0-series R004*S~R008*S | 1.20 | 1.84 | 1.80 | 1.0w |
| STE1206*1W0-series R009~R400 | 1.20 | 1.84 | 1.80 | 1.0w |
| STE2010M1W5-series R002~R003 | 0.70 | 2.88 | 3.65 | 1.5w |
| STE2010M1W5-series R004*S~R009*S | 2.70 | 2.88 | 2.65 | 1.5w |
| STE2010*1W5-series R010~R400 | 2.70 | 2.88 | 2.65 | 1.5w |
| STE2512M2W0-series R002 | 0.60 | 3.57 | 4.35 | 2.0w |
| STE2512M2W0-series R003 | 0.90 | 3.57 | 4.20 | 2.0w |
| STE2512M2W0-series R004*S~R009*S | 3.10 | 3.57 | 3.10 | 2.0w |
| STE2512*2W0-series R010~R400 | 3.10 | 3.57 | 3.10 | 2.0w |
| STE3921M3W0-series R002 | 1.10 | 5.75 | 6.45 | 3.0w |
| STE3921M3W0-series R003 | 1.70 | 5.75 | 6.15 | 3.0w |
| STE3921M3W0-series R004*S~R008*S | 5.00 | 5.75 | 4.50 | 3.0w |
| STE3921*3W0-series R009~R100 | 5.00 | 5.75 | 4.50 | 3.0w |
| STE4527M4W0-series R002 | 1.20 | 8.05 | 6.65 | 4.0w |
| STE4527M4W0-series R003*S~R005*S | 5.20 | 8.05 | 4.65 | 4.0w |
| STE4527*4W0-series R006~R100 | 5.20 | 8.05 | 4.65 | 4.0w |
Recommended Customer Soldering Parameters:
Wave Solder Temperature Curve: Preheat: 100~130, max.100 sec. Soldering: 250~265 max. 10 sec. Max. temperature: 2605, max. 10sec.
Solder Reflow Temperature Curve: Preheat: 145 15, max.120 sec. Soldering: min. 220, max. 60 sec. Max. temperature: 2605, max. 10sec.
2410121318_Walter-Elec-STE1206A1W0R065F_C388439.pdf
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