{"id":9940,"date":"2026-04-01T23:48:14","date_gmt":"2026-04-01T15:48:14","guid":{"rendered":"https:\/\/profixtips.com\/?p=9940"},"modified":"2026-04-02T00:24:18","modified_gmt":"2026-04-01T16:24:18","slug":"how-to-choose-ptc-start-relay-qp2-series-ptc-start-relay-data-sheet-and-selection-guide","status":"publish","type":"post","link":"https:\/\/profixtips.com\/ja\/how-to-choose-ptc-start-relay-qp2-series-ptc-start-relay-data-sheet-and-selection-guide\/","title":{"rendered":"PTC\u30b9\u30bf\u30fc\u30c8\u30ea\u30ec\u30fc\u306e\u9078\u3073\u65b9\uff1aQP2\u30b7\u30ea\u30fc\u30baPTC\u30b9\u30bf\u30fc\u30c8\u30ea\u30ec\u30fc\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u3068\u9078\u5b9a\u30ac\u30a4\u30c9"},"content":{"rendered":"

\u30bf\u30a4\u30d7A\u3068B\u306e PTC (Positive Temperature Coefficient) Starter Relay<\/b> is a critical \u201cgatekeeper\u201d for your refrigerator, freezer, or wine cooler compressor. If your appliance is clicking but not starting, or the compressor feels hot to the touch, a failed QP2 relay is the most likely culprit.<\/p>\n

This guide provides a technical deep-dive into the QP2-Series Datasheet<\/b> to help you select the exact replacement based on resistance, pins, and power requirements.<\/p>\n

\n
1. The Science Behind PTC Starters<\/h2>\n
A PTC starter uses a ceramic disc that has low resistance when cold. Upon startup, it allows a high current to flow into the compressor\u2019s start winding. As it heats up, its resistance increases drastically (almost instantly), effectively \u201cdisconnecting\u201d the start winding once the motor reaches speed.<\/p>\n
2. Technical Specifications: QP2 Series Resistance Table<\/h2>\n
Selecting the wrong resistance can lead to a \u201cShort Cycle\u201d or a complete failure to start. Use a multimeter to check your current part against these standard values:<\/p>\n\n
<\/figure>\n\n
\u6ce8\u610f:<\/strong>\u00a0\u201cAbnormal Resistance\u201d is defined as any value significantly\u00a0higher<\/strong>\u00a0than the ranges listed above or an \u201cOpen Circuit\u201d (infinite ohms).<\/p>\n
3. Critical Selection Criteria (The 3-Point Check)<\/h2>\n
\u00a0<\/p>\n
A. Ohm Rating (The Most Important)<\/h3>\n
Typically the resistance (\u03a9) must match your original part. A\u00a0QP2-4.7<\/strong>\u00a0cannot be replaced by a \u200bQP2-22<\/strong>\u200b.\u00a0<\/p>\n
If the resistance is too high, the compressor won\u2019t get enough \u201ckick\u201d to start.<\/p>\n
B. Pin Configuration<\/h3>\n
The QP2 series is available in:<\/p>\n
\n
1-Pin:<\/strong>\u00a0Standard setup.<\/li>\n
2-Pin \/ 3-Pin:<\/strong>\u00a0\u30af\u30a4\u30c3\u30af\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u00a0Run Capacitor<\/strong>\u00a0is involved in the circuit.
PTC\uff08\u6b63\u6e29\u5ea6\u4fc2\u6570\uff09\u30b9\u30bf\u30fc\u30bf\u30fc\u30ea\u30ec\u30fc.<\/li>\n<\/ul>\n
\u306f\u3001\u51b7\u8535\u5eab\u3001\u51b7\u51cd\u5eab\u3001\u307e\u305f\u306f\u30ef\u30a4\u30f3\u30af\u30fc\u30e9\u30fc\u306e\u30b3\u30f3\u30d7\u30ec\u30c3\u30b5\u30fc\u306b\u3068\u3063\u3066\u91cd\u8981\u306a\u300c\u9580\u756a\u300d\u3067\u3059\u3002\u6a5f\u5668\u304c\u30ab\u30c1\u30ab\u30c1\u3068\u97f3\u306f\u3059\u308b\u304c\u8d77\u52d5\u3057\u306a\u3044\u5834\u5408\u3001\u307e\u305f\u306f\u30b3\u30f3\u30d7\u30ec\u30c3\u30b5\u30fc\u304c\u89e6\u3063\u3066\u71b1\u304f\u306a\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u6545\u969c\u3057\u305fQP2\u30ea\u30ec\u30fc\u304c\u6700\u3082\u53ef\u80fd\u6027\u306e\u9ad8\u3044\u539f\u56e0\u3067\u3059\u3002<\/h3>\n
\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001.<\/p>\n
\n
QP2\u30b7\u30ea\u30fc\u30ba\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8<\/h2>\n
\n
\u306b\u3064\u3044\u3066\u6280\u8853\u7684\u306b\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3001\u62b5\u6297\u5024\u3001\u30d4\u30f3\u6570\u3001\u96fb\u529b\u8981\u4ef6\u306b\u57fa\u3065\u3044\u3066\u6b63\u78ba\u306a\u4ea4\u63db\u90e8\u54c1\u3092\u9078\u3076\u304a\u624b\u4f1d\u3044\u3092\u3057\u307e\u3059\u3002<\/strong>\u00a01. PTC\u30b9\u30bf\u30fc\u30bf\u30fc\u306e\u79d1\u5b66\u7684\u539f\u7406.<\/li>\n
PTC\u30b9\u30bf\u30fc\u30bf\u30fc\u306f\u3001\u4f4e\u6e29\u6642\u306b\u4f4e\u62b5\u6297\u3092\u793a\u3059\u30bb\u30e9\u30df\u30c3\u30af\u30c7\u30a3\u30b9\u30af\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u8d77\u52d5\u6642\u306b\u306f\u3001\u30b3\u30f3\u30d7\u30ec\u30c3\u30b5\u30fc\u306e\u59cb\u52d5\u5dfb\u7dda\u306b\u5927\u96fb\u6d41\u3092\u6d41\u3057\u307e\u3059\u3002\u52a0\u71b1\u3055\u308c\u308b\u3068\u62b5\u6297\u304c\u6025\u6fc0\u306b\uff08\u307b\u307c\u77ac\u6642\u306b\uff09\u5897\u52a0\u3057\u3001\u30e2\u30fc\u30bf\u30fc\u304c\u56de\u8ee2\u6570\u306b\u9054\u3059\u308b\u3068\u59cb\u52d5\u5dfb\u7dda\u3092\u5b9f\u8cea\u7684\u306b\u300c\u5207\u308a\u96e2\u3057\u307e\u3059\u300d\u3002<\/strong>\u00a02. \u6280\u8853\u4ed5\u69d8\uff1aQP2\u30b7\u30ea\u30fc\u30ba\u62b5\u6297\u5024\u8868.<\/li>\n
\u8aa4\u3063\u305f\u62b5\u6297\u5024\u3092\u9078\u3076\u3068\u3001\u300c\u30b7\u30e7\u30fc\u30c8\u30b5\u30a4\u30af\u30eb\u300d\u3084\u5b8c\u5168\u306a\u8d77\u52d5\u4e0d\u80fd\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30de\u30eb\u30c1\u30e1\u30fc\u30bf\u30fc\u3092\u4f7f\u7528\u3057\u3066\u3001\u73fe\u5728\u306e\u90e8\u54c1\u3092\u4ee5\u4e0b\u306e\u6a19\u6e96\u5024\u3068\u7167\u5408\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/strong>\u00a0Look for burn marks or a \u201cburnt toast\u201d smell near the terminals.<\/li>\n<\/ol>\n
\n
\u300c\u7570\u5e38\u62b5\u6297\u5024\u300d\u3068\u306f\u3001\u4e0a\u8a18\u306e\u7bc4\u56f2\u3092\u5927\u5e45\u306b<\/h2>\n
\u00a0<\/p>\n
\u8d85\u3048\u308b<\/h3>\n
\u5024\u3001\u307e\u305f\u306f\u300c\u30aa\u30fc\u30d7\u30f3\u56de\u8def\u300d\uff08\u7121\u9650\u5927\u30aa\u30fc\u30e0\uff09\u3068\u5b9a\u7fa9\u3055\u308c\u307e\u3059\u3002\u00a03. \u91cd\u8981\u306a\u9078\u5b9a\u57fa\u6e96\uff083\u30dd\u30a4\u30f3\u30c8\u30c1\u30a7\u30c3\u30af\uff09<\/strong>\u00a0A. \u30aa\u30fc\u30e0\u5b9a\u683c\uff08\u6700\u3082\u91cd\u8981\uff09.\u00a0<\/p>\n
\u901a\u5e38\u3001\u62b5\u6297\u5024\uff08\u03a9\uff09\u306f\u5143\u306e\u90e8\u54c1\u3068\u4e00\u81f4\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u00a0QP2-4.7<\/strong>\u00a0\u3092.<\/p>\n
QP2-22<\/h3>\n
\u306b\u7f6e\u304d\u63db\u3048\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u00a0\u62b5\u6297\u5024\u304c\u9ad8\u3059\u304e\u308b\u3068\u3001\u30b3\u30f3\u30d7\u30ec\u30c3\u30b5\u30fc\u304c\u8d77\u52d5\u306b\u5341\u5206\u306a\u300c\u30ad\u30c3\u30af\u300d\u3092\u5f97\u3089\u308c\u307e\u305b\u3093\u3002<\/strong>\u00a0B. \u30d4\u30f3\u69cb\u6210.<\/p>\n
QP2\u30b7\u30ea\u30fc\u30ba\u306f\u4ee5\u4e0b\u306e\u30bf\u30a4\u30d7\u304c\u3042\u308a\u307e\u3059\uff1a<\/h3>\n
1\u30d4\u30f3\uff1a\u00a0\u6a19\u6e96\u7684\u306a\u69cb\u6210\u3002<\/strong>\u00a02\u30d4\u30f3 \/ 3\u30d4\u30f3\uff1a.<\/p>\n
\u56de\u8def\u306b<\/h3>\n
\u30e9\u30f3\u30cb\u30f3\u30b0\u30b3\u30f3\u30c7\u30f3\u30b5\u00a0\u304c\u95a2\u4e0e\u3059\u308b\u5834\u5408\u306b\u3088\u304f\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/strong>\u00a0\u4ea4\u63db\u90e8\u54c1\u304c\u540c\u3058\u4f4d\u7f6e\u306b\u540c\u3058\u6570\u306e\u30b9\u30d7\u30fc\u30c9\u30b3\u30cd\u30af\u30bf\u3092\u6301\u3064\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n
Quick Navigation<\/h3>\n\n
C. \u7269\u7406\u7684\u306a\u30cf\u30a6\u30b8\u30f3\u30b0\u30b5\u30a4\u30ba<\/h3>\n\n“Not sure which one you need? Check the resistance value (Ohm) printed on your original relay or refer to our comparison table above.”\n\n
4. \u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\uff1aPTC\u306e\u4e0d\u826f\u3092\u898b\u5206\u3051\u308b\u65b9\u6cd5<\/h3>\n\n
<\/a><\/figure>\n\n
<\/figure>\n\n
<\/figure>\n\n
<\/figure>\n\n
<\/figure>","protected":false},"excerpt":{"rendered":"
The PTC (Positive Temperature Coefficient) Starter Relay is a critical “gatekeeper” for your refrigerator, freezer, or wine cooler compressor. If your appliance is clicking but not starting, or the compressor feels hot to the touch, a failed QP2 relay is the most likely culprit. This guide provides a technical deep-dive into the QP2-Series Datasheet to help you select the exact replacement based on resistance, pins, and power requirements. 1. The Science Behind PTC Starters A PTC starter uses a ceramic disc that has low resistance when cold. Upon startup, it allows a high current to flow into the compressor’s start winding. As it heats up, its resistance increases drastically (almost […]<\/p>\n","protected":false},"author":1,"featured_media":9950,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33,32],"tags":[629,630,628],"class_list":["post-9940","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-refrigerator-repair-tips","category-appliance-repair-tips","tag-how-to-choose-ptc-start-relay","tag-qp2-series-ptc-starter-data-sheet","tag-refrigerator-repair-tips"],"_links":{"self":[{"href":"https:\/\/profixtips.com\/ja\/wp-json\/wp\/v2\/posts\/9940","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/profixtips.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/profixtips.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/profixtips.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/profixtips.com\/ja\/wp-json\/wp\/v2\/comments?post=9940"}],"version-history":[{"count":0,"href":"https:\/\/profixtips.com\/ja\/wp-json\/wp\/v2\/posts\/9940\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/profixtips.com\/ja\/wp-json\/wp\/v2\/media\/9950"}],"wp:attachment":[{"href":"https:\/\/profixtips.com\/ja\/wp-json\/wp\/v2\/media?parent=9940"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/profixtips.com\/ja\/wp-json\/wp\/v2\/categories?post=9940"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/profixtips.com\/ja\/wp-json\/wp\/v2\/tags?post=9940"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

\u300c\u7570\u5e38\u62b5\u6297\u5024\u300d\u3068\u306f\u3001\u4e0a\u8a18\u306e\u7bc4\u56f2\u3092\u5927\u5e45\u306b<\/h2>\n\u00a0<\/p>\n

C. \u7269\u7406\u7684\u306a\u30cf\u30a6\u30b8\u30f3\u30b0\u30b5\u30a4\u30ba<\/h3>\n\n“Not sure which one you need? Check the resistance value (Ohm) printed on your original relay or refer to our comparison table above.”\n\n

\u300c\u7570\u5e38\u62b5\u6297\u5024\u300d\u3068\u306f\u3001\u4e0a\u8a18\u306e\u7bc4\u56f2\u3092\u5927\u5e45\u306b<\/h2>\n
\u00a0<\/p>\n