{"id":10236,"date":"2026-07-09T08:33:01","date_gmt":"2026-07-09T08:33:01","guid":{"rendered":"https:\/\/materialparts.com\/pma-a-r100-1-0\/"},"modified":"2026-07-09T08:35:06","modified_gmt":"2026-07-09T08:35:06","slug":"pma-a-r100-1-0","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/pma-a-r100-1-0\/","title":{"rendered":"PMA-A-R100-1.0"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

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.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u7c7b\u578b<\/td>\nISA-PLAN Precision Current Sense Resistor<\/td>\n<\/tr>\n
Series<\/td>\nPMA<\/td>\n<\/tr>\n
Resistance<\/td>\n100 mOhm<\/td>\n<\/tr>\n
Tolerance<\/td>\n+\/- 1%<\/td>\n<\/tr>\n
Power Rating<\/td>\n3 W<\/td>\n<\/tr>\n
Temperature Coefficient (20-60C)<\/td>\n< 30 ppm\/K<\/td>\n<\/tr>\n
Max Constant Current<\/td>\n5.48 A<\/td>\n<\/tr>\n
Internal Thermal Resistance (Rthi)<\/td>\n< 10 K\/W<\/td>\n<\/tr>\n
Dielectric Withstanding Voltage<\/td>\n100 VAC<\/td>\n<\/tr>\n
Inductance<\/td>\n< 10 nH<\/td>\n<\/tr>\n
Stability (2000h at rated power)<\/td>\n< 0.5% (TK=95C), < 1.0% (TK=110C)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-55 C to +140 C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n3924 (10.0 x 6.0 x 1.9 mm)<\/td>\n<\/tr>\n
Assembly<\/td>\nFlip-chip (reflow, IR, wave soldering)<\/td>\n<\/tr>\n
Termination<\/td>\nTin-lead (SnPb)<\/td>\n<\/tr>\n
Tape Width<\/td>\n16 mm<\/td>\n<\/tr>\n
Parts per Reel<\/td>\n3000<\/td>\n<\/tr>\n
RoHS<\/td>\nNote: SnPb termination, not RoHS compliant<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n

ISA-PLAN Manganin precision current sense resistor; 100 mOhm with +\/-1% tolerance; 3W power rating in compact 3924 SMD package; Low TCR of <30 ppmk 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 reel packaging (3000 units reel);tin-lead (snpb) termination\n\n\n\n

\u5e94\u7528<\/h2>\n

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<\/p>","protected":false},"excerpt":{"rendered":"

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 […]\n<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,15],"tags":[1490],"chip_brand":[1485],"class_list":["post-10236","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-logic-chips","tag-pma-a-r100-1-0","chip_brand-isabellenhuette"],"acf":{"brief_explanation":"100mOhm ISA-PLAN Manganin current sense resistor, 3W, 1%, <30ppm\/K, 3924 SMD, flip-chip","date_code":"","package_case":"3924 (10.0 x 6.0 x 1.9 mm)","in_stock":8230,"datasheet":"https:\/\/www.isabellenhuette.de\/fileadmin\/user_upload\/Datenblaetter\/PMA.pdf","price":"$3.50 @ 1ku","product_introduction":"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.","working_principle":"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.","pin_description":"
Terminal<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
Pad 1<\/td>Current Input (Force+)<\/td>Current<\/td>Current input terminal; carries load current through the resistive element<\/td><\/tr>
Pad 1 (inner)<\/td>Sense+ (Kelvin)<\/td>Voltage<\/td>Kelvin sense terminal for positive voltage measurement<\/td><\/tr>
Pad 2<\/td>Current Output (Force-)<\/td>Current<\/td>Current output terminal; carries load current away from the resistive element<\/td><\/tr>
Pad 2 (inner)<\/td>Sense- (Kelvin)<\/td>Voltage<\/td>Kelvin sense terminal for negative voltage measurement<\/td><\/tr><\/table>","application_scenarios":"
  • SMPS Current Mode Control:<\/strong> 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.<\/li>
  • Power Hybrid Modules:<\/strong> Flip-chip assembly enables direct integration into IGBT and MOSFET power modules for integrated current sensing.<\/li>
  • Motor Drive Current Sensing:<\/strong> Monitors motor phase currents with <30 ppm\/K TCR ensuring accuracy over automotive temperature range.<\/li>
  • Industrial Power Monitoring:<\/strong> Measures load currents in industrial power distribution with 0.5% long-term stability over 2000 hours.<\/li><\/ul>","alternative_models":"
    Manufacturer<\/th>Part Number<\/th>Package<\/th>Resistance<\/th>Notes<\/th><\/tr>
    Isabellenhuette<\/td>PMA-A-R050-1.0<\/td>3924<\/td>50 mOhm<\/td>Same series, lower resistance<\/td><\/tr>
    Isabellenhuette<\/td>PMA-A-R220-1.0<\/td>3924<\/td>220 mOhm<\/td>Same series, higher resistance<\/td><\/tr>
    Isabellenhuette<\/td>VMK-R100-1.0-PMA<\/td>1206<\/td>100 mOhm<\/td>Smaller 1206 package, 0.75W<\/td><\/tr>
    TT Electronics<\/td>ULR1-R100FT2<\/td>2512<\/td>100 mOhm<\/td>Metal alloy, 1W, AEC-Q200<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/10236","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=10236"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/10236\/revisions"}],"predecessor-version":[{"id":10246,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/10236\/revisions\/10246"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=10236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=10236"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=10236"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=10236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}