RSMP4527 Epoxy SMD Chip E-Beam Welding Alloy Resistor
The RSMP4527 is an epoxy-coated SMD chip e-beam welding alloy resistor with a pure copper electrode, intended as a current-detection sensing element. It is rated at 12W at 70°C and is offered in resistance values from 1mΩ to 100mΩ, in manganese copper or Karma resistive material. Values from 1mΩ to 6mΩ carry a temperature coefficient of resistance of ±75ppm/°C, while values from 7mΩ to 100mΩ carry a temperature coefficient of resistance of ±50ppm/°C. Tolerance options are ±1% and ±5%. Parasitic inductance is held below 5nH and thermal EMF below 1μV/°C, and the operating temperature range extends from -55°C to +170°C. The part is RoHS compliant and AEC-Q200 qualified, offers high reliability, stability and superb pulse load capability, and is supplied taped and reeled on 7-inch reels for 24mm tape.
What are the RSMP4527 Epoxy SMD Chip E-Beam Welding Alloy Resistors?
The RSMP4527 is a current-sensing resistor built from a manganese copper or Karma resistive element joined to a pure red copper terminal by electron-beam welding. The red copper terminal carries a nickel and tin plating, the resistance value is applied by laser marking, and the assembly is coated with a heat-resistant epoxy resin that gives the part excellent weather resistance. The RSMP4527 carries ultra-low thermal EMF and ultra-low parasitic inductance, giving it a fast response suited to high-frequency AC current detection as well as general DC current sensing, along with high reliability, stability and superb pulse load capability.
The RSMP4527 is offered in two resistance groupings within a single 12W power rating, each available in manganese copper or Karma material. Values from 1mΩ to 6mΩ carry a temperature coefficient of resistance of ±75ppm/°C, while values from 7mΩ to 100mΩ carry a temperature coefficient of resistance of ±50ppm/°C. Tolerance is available in ±1% or ±5% across both groupings, and both share a parasitic inductance below 5nH, a thermal EMF of less than 1μV/°C over 0-100°C, and an operating temperature range of -55°C to +170°C. Rated power follows a derating curve that holds 100% of rated power up to 70°C ambient before linearly reducing to zero at 170°C.
Physically, the RSMP4527 measures 11.6±0.5mm in length and 6.6±0.5mm in width, with a terminal dimension A of 1.6±0.5mm, a terminal thickness t of 1.6±0.1mm and an overall body thickness T of 2±0.2mm. The part is qualified to IEC60115-1 test methods covering temperature coefficient of resistance, solderability, short-time overload, resistance to soldering heat, base plate bending, flammability, insulation resistance, withstand voltage, solvent resistance, high-temperature and humidity exposure, high-temperature storage, low-temperature load, temperature cycling and load life, and is AEC-Q200 qualified and RoHS compliant. Parts are supplied on 7-inch reels for 24mm tape, in quantities of 500 pieces per reel.
RSMP4527 Epoxy SMD Chip E-Beam Welding Alloy Resistor Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
Series: RSMP4527
Product group: Current sensing resistor
Description: AEC-Q200, Epoxy-coated E-beam Welding Alloy Resistor
Power Rating: 12W
Resistance (Ω): 1m~100m
Tolerance (%): ±1, ±5
TCR (ppm/C): 50,75
Applications of the RSMP4527 Epoxy SMD Chip E-Beam Welding Alloy Resistor
Where RARA current sensing resistors are deployed in the field.
The RSMP4527 as an ideal solution for current detection applications, and its ultra-low parasitic inductance and fast response make it specifically suited to high-frequency AC current detection as well as general DC current sensing.
The AEC-Q200 qualification indicates suitability for automotive electronics, and its high reliability, stability and superb pulse load capability are the type of specification generally sought in shunt-based current-sensing circuits, such as current feedback loops in motor drives and inverters and output current monitoring in power supplies, where accurate, stable measurement of current is required.
Related Products of the RSMP4527 Epoxy SMD Chip E-Beam Welding Alloy Resistor
Model: PCBS
Resistor type: AEC-Q200 PCB+shunt
Description: Current sensing module
Rated Current: 350~1000A
Resistance (Ω): 25u, 50u, 100u
Tolerance (%): ±5
TCR (ppm/C): 100
Model: TCS8440T
Resistor type: AEC-Q200 E-beam
Description: E-beam welded shunt
Power Rating: 36W
Rated Current: 840A
Resistance (Ω): 0.05m
Tolerance (%): ±1, ±2, ±5
TCR (ppm/C): 100
Model: ECS
Resistor type: AEC-Q200
Description: Chip shunt
Power Rating: 1W~15W
Resistance (Ω): 0.2~10m
Tolerance (%): ±1, ±2, ±5
TCR (ppm/C): 100-200
Model: TCS
Resistor type: AEC-Q200 E-beam
Description: Shunt
Power Rating: 12W~36W
Rated Current: 200~350A
Resistance (Ω): 0.05~0.5m
Tolerance (%): ±1, ±2, ±5
TCR (ppm/C): 100
Why Choose RARA Current Sensing Resistors
What sets RARA apart for engineers and procurement managers in industrial and automotive markets.
01
8 Sub-Categories
No other single supplier covers AEC-Q200 chip shunts, milliohm precision types, four-terminal Kelvin shunts, power metering, and 12,000A panel shunts under one ISO-certified roof.
02
Extreme Precision
HPS, UHPS, and PSS precision shunts deliver ±0.05% tolerance and 3 ppm/°C TCR — meeting the accuracy demands of EV battery coulomb counting, precision power analyzers, and billing-grade energy metering.
03
Automotive Qualified
Multiple AEC-Q200 certified models (BCS, LRA, ECS, BWR, TCS, PCBS) with IATF 16949 manufacturing certification — covering EV battery management, motor control, and charging applications.
04
Global Track Record
Trusted by Tesla, GM Korea, Proterra, Siemens, Rockwell, and Schneider Electric — deployed in EV powertrains, industrial drives, and utility metering systems across six continents.
