electron beam welded shunt resistor
300A precision shunt
electron beam welded shunt

300A precision Electron Beam Welded Shunt Resistor With 3 terminal

Category:

Description

300A precision Electron Beam Welded Shunt Resistor With 3 terminal

Designed for high-accuracy current measurement, this 300A precision electron beam welded shunt resistor with 3 terminals offers exceptional stability and low resistance. Ideal for EV battery packs, BMS, and industrial energy storage systems, it ensures reliable performance under heavy load and harsh conditions. Customizable resistance values and mounting options available

electron beam welded shunt

Electrical parameter

Model L D L1 A F M  C B1   B2
FL3-6918-B-50μQ 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 parameter
Rated Current 300A
AccuracyClass 0.2%、0.5%、1%、2%、5%
20℃~60℃Temperature coefficient of resistance T.C.R(ppm/℃) ≤50
Manganese copper material National standard 6J12 precision manganese copper
Copper material National StandardT2 Y2
Operating Temperature Range -55℃~+170℃

Performance testing

Performance Testing
Project Test conditions Resistance range
Thermal shock -40℃ to +150℃, 1000 cycles, 15 minutes at each extreme ±0.5%R
Short-term overload 2.5 times rated power, lasting 5 seconds ±0.5%R
Low temperature operation -40℃45 seconds ±0.5%R
High temperature exposure at +170℃下1000h ±1%R
Deviation humidity +85℃,85%RH,10%deviation ，1000h ±0.5%R
Mechanical shock 100 ms, 6 ms, 5 pulses ±0.5%R
vibration Frequency changes from 10Hz to 2000Hz in 1 minute, 3 directions, 12 hours ±1%
Load life 1000 hours at +70°C, 1.5 hours “on”, 0.5 hours “off” ±0.5%
Moisture-proof MIL-STD-202 ±0.5%

Derating Curve:

✅ Applications

The 300A precision electron beam welded shunt resistor with 3 terminals is ideal for accurate current measurement in high-power systems. It is widely used in:

  • 🔋 EV Battery Packs – For monitoring current flow in electric motorcycles, three-wheelers, and compact EVs.

  • ⚡ Battery Management Systems (BMS) – Ensures precise current sensing and protection in lithium-ion battery systems.

  • ☀️ Energy Storage Systems (ESS) – Supports stable load control and energy monitoring in solar and commercial storage units.

  • 🏭 Industrial Power Equipment – Applied in UPS, inverters, and high-load power modules for current detection.

  • 🚉 Railway and Heavy Equipment – Handles current monitoring in transportation battery systems under demanding conditions.

Related products