MSTC Current Sensor Resistor
The MSTC series Metal Strap Current Sensing Resistors are designed for accurate current sensing applications. These resistors offer reliable performance and are suitable for various electronic circuits requiring precise current measurement.
Product Attributes
- Brand: Walter company
- Material: MnCu alloy (Manganese Copper Alloy)
- Protective Coating (Color): Green (LV)
- Marking Coating (Color): White
Technical Specifications
| Part Number Series | Series Number | Material | Power Rating | Nominal Resistance Value | Resistance Tolerance | Product Code | Dimensions (mm) WxLxT | Terminal Electrode Material | Substrate Material | Adhesive Material | Protective Coating | Marking Coating |
| MSTC0402MW33-series | MSTC0402 | MnCu alloy | 0.33 Watt | 2m~R025 | 1%(F) | V, LV | 0.550.10 x 1.000.10 x 0.300.05 | Sn, Ni, Cu | Epoxy | Epoxy | Flame-retardant epoxy (UL-94-V0) | Flame-retardant epoxy (UL-94-V0) |
| MSTC0402MW25-series | MSTC0402 | MnCu alloy | 0.25 Watt | R050 | 1%(F) | blank | 0.550.10 x 1.000.10 x 0.300.05 | Sn, Ni, Cu | Epoxy | Epoxy | Flame-retardant epoxy (UL-94-V0) | Flame-retardant epoxy (UL-94-V0) |
| MSTC0603MW33-series | MSTC0603 | MnCu alloy | 0.33 Watt | R002~R020 | 1%(F) | blank | 0.800.25 x 1.600.25 x 0.400.25 | Sn, Ni, Cu | Epoxy | Epoxy | Flame-retardant epoxy (UL-94-V0) | Flame-retardant epoxy (UL-94-V0) |
| MSTC0805MW50-series | MSTC0805 | MnCu alloy | 0.50 Watt | R001~1M50 | 1%(F) | V, LV | 1.250.25 x 2.000.25 x 0.400.10 | Sn, Ni, Cu | Epoxy | Epoxy | Flame-retardant epoxy (UL-94-V0) | Flame-retardant epoxy (UL-94-V0) |
| MSTC1206M1W0-series | MSTC1206 | MnCu alloy | 1.0 Watt | R001~1M50 | 1%(F) | LV | 1.600.25 x 3.200.25 x 0.400.25 | Sn, Ni, Cu | Epoxy | Epoxy | Flame-retardant epoxy (UL-94-V0) | Flame-retardant epoxy (UL-94-V0) |
Electrical Characteristics
| Part Number Series | Resistance Value (m) | Power Rating (Watt) | Resistance Tolerance (%) | TCR (ppm/) |
| MSTC0603MW33-series | R002~R020 | 0.33 | 1%(F) | 150 (2.5~5), 100 (6~20), 75 |
| MSTC0805MW50-series | R001~R020*LV | 0.5 | 1%(F) | 150 (1.5), 100 (2~5), 75 (6~20), 50 |
| MSTC1206M1W0-series | R001~R020*LV | 1.0 | 1%(F) | 75 (1~4), 50 (5~20) |
| MSTC0402MW33-series | 2M50~R025 | 0.33 | 1%(F) | 150 (2.5~3), 100 (5~25) |
| MSTC0402MW25-series | R050 | 0.25 | 1%(F) | 100 |
Product Characteristics and Reliability Test Standard
| Parameter | Conditions | Acceptance Criteria | Standard |
| Short Time Over Load | P= 2.5Pr ; T=252C , t = 5sec. | (1.0%+0.5m) | IEC60115-1 4.13 |
| High Temp. Exposure | T = +1552C ; t = 1000h | (1.0%+0.5m) | IEC60115-1 4.25 |
| Low Temp. Storage | T = -552C ; t = 1000h | (1.0%+0.5m) | IEC60115-1 4.25 |
| Moisture Load Life | (6095RH) Vtest = Vmax ; T=602C ; RH=95% ; t= 90min ON , 30min OFF , 1000h | (2.0%+0.5m) | IEC60115-1 4.25 |
| Thermal Shock | [-55C 30min. R.T. 3min. +155C 30min. R.T. 3min ], 100 Cycles | (1.0%+0.5m) | IEC60115-1 4.19 |
| Load Life at 70C | Vtest = Vmax ; T=702C ;t= 90min ON , 30min OFF,1000h | (2.0%+0.5m) | IEC60115-1 4.25 |
| Solderability | Dip into solder at T = 2455C , t = 30.5sec. | The covered area >95% | IEC60115-1 4.17 |
| Resistance to Solder Heat | Through Reflow T= 2755C , t =201sec. | (1.0%+0.5m) | IEC60115-1 4.18 |
| Mechanical Shock | a =100G , t =11ms, 5 times shock | (1.0%+0.5m) | IEC60115-1 4.21 |
| Substrate Bending | Span:90mm ; Bend Width:2mm ; Testboard:GlassEpoxyBoard ; Thickness =1.6mm | (1.0%+0.5m) | IEC60115-1 4.33 |
Environmental Characteristics
Operating Temperature: -55155
Storage Conditions: Under airtight in temperature +1040, relative humidity 75% for 2 years. Without dew in temperature +1060, relative humidity 95% for maximum 30 days.
Solder Pad Size and Welding Conditions
| Part Number Series | P (mm) | W (mm) | D (mm) | Loading (Watt) |
| MSTC0402MW33-series | 0.35 / 0.40 | 0.60 | 0.60 | 0.33 |
| MSTC0402MW25-series | 0.40 | 0.60 | 0.60 | 0.25 |
| MSTC0603MW33-series | 0.38 / 0.50 / 0.60 | 0.92 | 1.41 / 1.35 / 1.30 | 0.33 |
| MSTC0805MW50-series | 0.40 / 0.50 / 0.80 | 1.44 | 1.60 / 1.55 / 1.40 | 0.5 |
| MSTC1206M1W0-series | 0.50 / 0.60 / 1.20 | 1.84 | 2.15 / 2.10 / 1.80 | 1.0 |
Recommended Customer Soldering Parameters:
Solder reflow Temperature condition: Preheating: 145 15, max.120 sec. Soldering: min. 220, max. 60 sec. Maximum temperature: 2605, max. 10sec.
Rework temperaturehot air equipment350, 3~5 seconds
Recommended reflow methods: IR, vapor phase oven, hot air oven.
Lot Acceptance Test Requirements
Visual: No outstanding stains, dirt, printing errors, or damage.
Dimensions: All dimensions within specified standards.
Resistance (Ro): Within specified standards at 25 using 4-wire measurement.
2410121317_Walter-Elec-MSTC0402MW25R047F_C970973.pdf
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