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SMT-R050-1.0
SMT-R050-1.0
| Part Number | SMT‑R050‑1.0 |
|---|---|
| Manufacturer | Isabellenhütte |
| Category | Resistors > Current Sense Resistors > Surface Mount Resistors (SMD) |
| Description | High‑Precision Low‑Resistance Current Sense Resistor, 50 mOhm (0.05 Ohm), 1.0% Tolerance, 5W Power Rating, 2817 Package. |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
SMT‑R050‑1.0 is an AEC‑Q200 automotive‑grade metal‑alloy current‑sense resistor from Isabellenhütte. 50 mOhm, ±1.0% tolerance, 2817(7243) SMD package. Built with electron‑beam welded alloy for low TCR, high pulse capability and excellent long‑term stability. Suitable for BMS, power supplies, motor control and industrial high‑current sensing.
Core Advantages
High Power & Thermal Performance
5W@70℃ / 3W@105℃ rating with low internal thermal resistance for efficient heat dissipation.
Low TCR Characteristic
TCR ＜50 ppm/K, keeps small resistance drift across wide‑temperature working range.
Pulse & Long‑Term Stability
＜3 nH low inductance, excellent pulse‑load performance and long‑term stability.
Precision Sensing Performance
Low thermal EMF value, effectively minimize measurement deviation for current‑sense circuits.
Automotive‑Grade Qualified
AEC‑Q200 qualified, supports reflow and IR soldering for automotive and industrial projects.
Key Specifications
| Brand | Isabellenhütte |
|---|---|
| RoHS Status | RoHS Compliant / Lead‑Free, RoHS 2011/65/EU compliant |
| Qualification | AEC‑Q200 Qualified |
| EDA/CAD | Symbol, Footprint & 3D Model Available |
| Warranty | 1‑Year Standard Quality Warranty |
| Package / Case | 2817 (7243 Metric) SMD |
| Mounting Type | Surface Mount Device (SMD/SMT), Reflow‑ and IR‑soldering compatible |
| Surface Marking / Silkscreen | R050 Marking |
| Resistance Value | 50 mOhm (0.05 Ohm) |
| Tolerance | ±1.0% |
| Power Rating (P70℃) | 5.0 W (Depending on mounting conditions, for resistance ≥10mΩ) |
| Power Rating (P105℃) | 3.0 W (For resistance ≥10mΩ) |
| Temperature Coefficient (TCR) | ＜50 ppm/K (for resistance ≥10 mΩ) |
| Internal Heat Resistance (Rth) | ＜22 K/W (for resistance ≥10mΩ) |
| Dielectric Withstanding Voltage | 200 V AC/DC |
| Inductance | < 3 nH |
| Operating Temperature Range | -55°C to +170°C |
| Long‑Term Stability | Deviation ＜0.5% after 2000h at terminal temperature 75℃ |
| Resistor Technology | Metal Alloy / Electron‑Beam Welded Construction |
| Packaging Format | Tape & Reel / Anti‑Static Carrier Packaging |
Typical Applications
- Automotive Electric Vehicle (EV) battery management systems (BMS) and main power distribution units
- Switching power supplies (SMPS), DC‑DC converters, and voltage regulator modules (VRM)
- Industrial motor control, frequency inverters, and servo drive power stages
- Power tools, electronic fuses, and smart circuit breaker equipment
- Precision current monitoring in solar inverters and energy storage systems
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1‑2 business days |
| Delivery Time | 3‑7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, sample requests, stock check, or bulk pricing, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: What does SMT‑R050‑1.0 part number mean?
A: R050 = 50 mOhm resistance; suffix 1.0 = ±1.0% tolerance. SMT stands for Isabellenhütte 2817 surface‑mount resistor series.
Q2: Can SMT‑R050‑1.0 be replaced by other‑brand current sense resistors?
A: Cross‑reference 2817 size, 50mΩ,1% metal‑alloy SMD resistors are mechanically compatible. Most alternatives come with higher TCR or worse thermal‑EMF. Prefer original for automotive BMS & precision measurement; substitutes are acceptable for general industrial circuits.
Q3: What is the difference between P70℃ and P105℃ power rating?
A: P70℃:5W@terminal temp 70℃; P105℃:3W derated power@105℃. Actual power depends heavily on PCB copper layout. Apply proper power derating for high‑temperature operation.
Q4: Is SMT‑R050‑1.0 AEC‑Q200 qualified for automotive projects?
A: Yes. This 2817 series is AEC‑Q200 qualified, supports reflow & IR soldering, suitable for automotive BMS and on‑board power sensing.
Q5: Can I use SMT‑R050‑1.0 under high‑temperature automotive conditions?
A: Yes. Operating range ‑55℃ ~ +170℃. Metal‑alloy construction supports automotive and heavy‑duty industrial high‑temperature environments.
Q6: Can I directly swap it with resistors of other package sizes?
A: No. Only 2817(7243 metric) footprint parts can drop‑in replace. Different package sizes vary in power dissipation, pad layout and thermal resistance, cannot be directly substituted.
Q7: How to get datasheet, pad pattern recommendation or bulk quotation?
A: Submit your requirement via inquiry form. Our team will return full datasheet, PCB land pattern, stock status and volume price within 24 hours.
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