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PMA-A-R100-1.0

100mOhm ISA-PLAN Manganin current sense resistor, 3W, 1%, <30ppm/K, 3924 SMD, flip-chip

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Manufacturer Part：

PMA-A-R100-1.0

Package：

3924 (10.0 x 6.0 x 1.9 mm)

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Description

Product Overview

The PMA-A-R100-1.0 is a Isabellenhuette product designed for electronic applications. It features compact design with reliable performance characteristics suitable for various industrial and consumer applications.

Key Specifications

Type ISA-PLAN Precision Current Sense Resistor
Series PMA
Resistance 100 mOhm
Tolerance +/- 1%
Power Rating 3 W
Temperature Coefficient (20-60C) < 30 ppm/K
Max Constant Current 5.48 A
Internal Thermal Resistance (Rthi) < 10 K/W
Dielectric Withstanding Voltage 100 VAC
Inductance < 10 nH
Stability (2000h at rated power) < 0.5% (TK=95C), < 1.0% (TK=110C)
Operating Temperature -55 C to +140 C
Package 3924 (10.0 x 6.0 x 1.9 mm)
Assembly Flip-chip (reflow, IR, wave soldering)
Termination Tin-lead (SnPb)
Tape Width 16 mm
Parts per Reel 3000
RoHS Note: SnPb termination, not RoHS compliant

Features

ISA-PLAN Manganin precision current sense resistor; 100 mOhm with +/-1% tolerance; 3W power rating in compact 3924 SMD package; Low TCR of <30 ppm/K using Manganin alloy; Constant current up to 5.48A; Excellent long-term stability (<0.5% after 2000h at 95C); Flip-chip assembly for low parasitic inductance (<10 nH); Dielectric withstanding voltage 100VAC; Reflow, IR and wave soldering compatible; Tape and reel packaging (3000 units/reel); Tin-lead (SnPb) termination

Applications

Current sensing in power hybrid modules; Switch mode power supplies (SMPS); Battery management systems; Motor drive current monitoring; Power module current measurement; Industrial automation; Automotive current sensing; Inverter current feedback

The PMA-A-R100-1.0 from Isabellenhuette is a 100 mOhm ISA-PLAN precision current sense resistor in the 3924 SMD package, utilizing the proprietary Manganin resistive alloy on a ceramic substrate. With a constant current rating of 5.48A and 3W power dissipation, this device is optimized for medium-current sensing applications in power electronics. The Manganin alloy delivers an exceptionally low temperature coefficient of less than 30 ppm/K in the 20-60C range, ensuring measurement accuracy across varying operating conditions. The ISA-PLAN construction employs a flat resistive element bonded to an alumina carrier with flip-chip assembly, minimizing parasitic inductance to less than 10 nH. The device demonstrates outstanding long-term stability with resistance deviation of less than 0.5% after 2000 hours at rated power. Note: This variant uses tin-lead (SnPb) termination and is not RoHS compliant; for RoHS-compliant alternatives, consult the Isabellenhuette PMB or VMK series.

The PMA-A-R100-1.0 operates as a precision shunt resistor where current flowing through the 100 mOhm Manganin element produces a proportional voltage drop (V = I x R). For a 5A load current, the sense voltage is 500 mV, well within the input range of most current sense amplifiers and ADCs. The Manganin alloy (copper-manganese-nickel) exhibits a remarkably flat resistance-temperature characteristic, with a TCR of less than 30 ppm/K in the 20-60C range. The ISA-PLAN construction bonds the resistive foil directly to the alumina ceramic substrate, providing a low thermal resistance path from the resistive element to the PCB. The flip-chip assembly eliminates wire bonds or lead frames that would add parasitic inductance, resulting in less than 10 nH total inductance. The 4-terminal Kelvin pad layout separates the current-carrying force terminals from the voltage-sensing terminals, eliminating measurement error from solder joint resistance.

Terminal Name Type Function
Pad 1 Current Input (Force+) Current Current input terminal; carries load current through the resistive element
Pad 1 (inner) Sense+ (Kelvin) Voltage Kelvin sense terminal for positive voltage measurement
Pad 2 Current Output (Force-) Current Current output terminal; carries load current away from the resistive element
Pad 2 (inner) Sense- (Kelvin) Voltage Kelvin sense terminal for negative voltage measurement
  • SMPS Current Mode Control: Provides cycle-by-cycle current feedback in switch mode power supplies with 100 mOhm delivering 500mV at 5A, ideal for current sense amplifier input range.
  • Power Hybrid Modules: Flip-chip assembly enables direct integration into IGBT and MOSFET power modules for integrated current sensing.
  • Motor Drive Current Sensing: Monitors motor phase currents with <30 ppm/K TCR ensuring accuracy over automotive temperature range.
  • Industrial Power Monitoring: Measures load currents in industrial power distribution with 0.5% long-term stability over 2000 hours.
Manufacturer Part Number Package Resistance Notes
Isabellenhuette PMA-A-R050-1.0 3924 50 mOhm Same series, lower resistance
Isabellenhuette PMA-A-R220-1.0 3924 220 mOhm Same series, higher resistance
Isabellenhuette VMK-R100-1.0-PMA 1206 100 mOhm Smaller 1206 package, 0.75W
TT Electronics ULR1-R100FT2 2512 100 mOhm Metal alloy, 1W, AEC-Q200
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Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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Service & Packaging

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Contact Information

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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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