Bolt-On Shunt Resistor for High Current Measurement & DC Systems
Description
Overview
This bolt-on shunt resistor is designed for high-accuracy DC current measurement in power systems, battery monitoring, and industrial control applications. It ensures stable performance, low resistance, and reliable measurement under high current conditions.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
Common Problems in Current Measurement
- Overheating in high current environments
- Inaccurate readings due to unstable resistance
- Loose connection in traditional wiring shunts
- Limited durability in industrial systems
How This Bolt-On Shunt Solves Them
- Bolt-on design ensures stable and secure connection
- High precision resistance for accurate measurement
- Excellent thermal stability under continuous load
- Long service life in industrial environments
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℃ |
For more technical background on current shunt measurement principles, you may refer to
Shunt resistor principle in electrical engineering：https://en.wikipedia.org/wiki/Shunt_(electrical)
Operating Conditions
- Operating temperature: -40°C to +120°C
- Suitable for high-current DC systems
- Designed for industrial and energy environments
- Resistant to vibration and thermal stress
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
- DC power distribution systems
- Battery management systems (BMS)
- Electric vehicle charging systems
- Inverters and converters
- Industrial automation and control systems
- Widely used in energy monitoring and industrial power systems
Looking for more current sensing and power testing solutions?
Explore our DC ammeter shunt resistor series designed for industrial and energy applications.
Need a Custom Bolt-On Shunt Resistor?
- Custom current range available
- Fast sample support
- Engineering assistance for your application
