Description
Overview
50 μΩ bolt-on shunt resistor with two sense pins offers high-precision current sensing for demanding DC applications. Made from premium manganin alloy, it ensures low temperature coefficient (TCR) and stable resistance over time, minimizing measurement errors. The bolt-on terminals allow for easy and secure installation in battery management systems, power supplies, and industrial equipment.
Feature of Bolt-on Shunt Resistor
High power to resistor size ratio
• Proprietary processing technique produces
extremely low resistance values
• All welded construction
• Solid metal manganese-copper alloy resistive
element with low TCR (< 50 ppm/°C)
• Very low inductance (< 5 nH)
• Low thermal EMF (< 3 μV/°C)
• Material categorization: for definitions of compliance
Specification
| Parameter | Value |
|---|---|
| Resistance Value | 50 μΩ |
| TCR (Temperature Coefficient) | ≤ ±50 ppm/°C |
| Accuracy Class | ±0.5% |
| Maximum Current Rating | Depends on model (e.g., 100A) |
| Operating Temperature Range | -40°C to +125°C |
| Material | Manganin Alloy |
| Mounting Style | Bolt-on Terminals |
| Sense Pins | Two (Kelvin connection) |
| Dimensions (L×W×H) | customize |
| Power Rating | 50W |
Product Size
| Model | L (mm) | D (mm) | A (mm) | B (mm) | F (mm) | M |
|---|---|---|---|---|---|---|
| FL3-6918-A-100μΩ | 69±0.5 | 18±0.5 | 52±0.5 | 18±0.5 | 3±0.2 | φ7.0×2 M4×2 |
| Model | L (mm) | D (mm) | L1 (mm) | A (mm) | F (mm) | M | C | B1 (mm) | B2 (mm) |
|---|---|---|---|---|---|---|---|---|---|
| FL3-6918-B-50μΩ | 69±0.5 | 18±0.5 | 52±0.5 | 7±0.5 | 3.0±0.5 | φ7.0×2 | 1×1 | 4±0.1 | 6±0.15 |
Electrical performance:
| Parameter | Value |
|---|---|
| Rated Current | 300A |
| Accuracy Class | 0.2%、0.5%、1%、2%、5% |
| T.C.R (ppm/℃ at 20℃~60℃) | ≤50 |
| Manganese Copper Material | GB 6J12 precision manganese copper |
| Copper Material | GB T2 Y2 |
| Operating Temperature Range | -55℃ ~ +170℃ |
Why Choose a Bolt-On Shunt Resistor for High-Current Sensing?
Bolt-on Shunt resistors offer superior mechanical strength and electrical stability, making them ideal for applications that require:
Secure fastening with screw terminals
Low-resistance, low-inductance current paths
High thermal conductivity
Robust performance under vibration and shock
The dual sense pins guarantee accurate Kelvin measurements, reducing errors caused by lead resistance.
Typical Applications Include:
DC Power Distribution Systems
Accurate current monitoring in battery banks, busbars, and load distribution panels.Inverter and Converter Systems
Suitable for Variable Frequency Drives (VFDs), solar inverters, and EV motor controllers.Battery Management Systems (BMS)
Enables real-time current tracking in lithium-ion battery packs and energy storage systems.
