{"id":3433,"date":"2023-11-29T09:12:09","date_gmt":"2023-11-29T01:12:09","guid":{"rendered":"https:\/\/www.jingpengpcb.com\/?p=3433"},"modified":"2026-10-02T19:31:29","modified_gmt":"2026-10-02T11:31:29","slug":"three-types-of-pcba-temperature-curves","status":"publish","type":"post","link":"https:\/\/www.jingpengpcb.com\/en\/blog\/three-types-of-pcba-temperature-curves\/","title":{"rendered":"Three Typical Temperature Curves for PCBA Circuit Boards"},"content":{"rendered":"<p>In the electronics manufacturing industry, the production process for PCBA (Printed Circuit Board Assembly) circuit boards involves soldering steps, and the design of the temperature profiles for these soldering steps is critical to product quality and reliability.<\/p>\n<p>Different types of electronic products require different soldering temperature profiles. This article will introduce three typical PCBA circuit board temperature profiles: the triangular temperature profile, the peak-temperature profile with heating and holding, and the low-peak-temperature profile.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-8692\" src=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/three-types-of-pcba-temperature-curves-1024x576.jpg\" alt=\"Three Typical Temperature Curves for PCBA Circuit Boards\" width=\"1024\" height=\"576\" srcset=\"https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/three-types-of-pcba-temperature-curves-1024x576.jpg 1024w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/three-types-of-pcba-temperature-curves-300x169.jpg 300w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/three-types-of-pcba-temperature-curves-768x432.jpg 768w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/three-types-of-pcba-temperature-curves-1536x863.jpg 1536w, https:\/\/www.jingpengpcb.com\/wp-content\/uploads\/2023\/08\/three-types-of-pcba-temperature-curves.jpg 1594w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h2>1. Triangular Temperature Curve<\/h2>\n<h3>What is a triangular temperature curve?<\/h3>\n<p>Triangular temperature curves are suitable for simple PCBA products and typically take the form of curves with uniform temperature rises and falls. This is because, in these types of products, the PCB tends to generate heat easily, causing the temperatures of the components and the PCB to be similar, resulting in a small temperature difference across the PCB surface.<\/p>\n<h3>Advantages of the Triangular Temperature Curve<\/h3>\n<ul>\n<li>Time-saving: The heating rate for this type of curve is generally 1\u20131.5\u00b0C, and it consumes relatively little energy, making it an effective choice from an economic standpoint.<\/li>\n<li>Solder Joint Quality: When the solder paste formulation is properly configured, a triangular temperature profile can produce brighter solder joints.<\/li>\n<\/ul>\n<h3>Requirements for the Triangular Temperature Curve<\/h3>\n<ul>\n<li>Adaptability: It is essential to ensure that the flux\u2019s activation time and temperature are compatible with the higher melting temperature of lead-free solder paste.<\/li>\n<li>Heating Rate: The heating rate must be controlled uniformly and is generally maintained at 1\u20131.5\u00b0C.<\/li>\n<li>Recommendation: Although triangular temperature curves have their advantages, they are generally not recommended for products that require more precise temperature control.<\/li>\n<\/ul>\n<h2>2. Peak Temperature Curve for Heating and Holding<\/h2>\n<h3>What is a heating and holding peak temperature curve?<\/h3>\n<p>The peak temperature curve for heating and holding, also known as the \"tent curve,\" is suitable for products that require more precise temperature control. These types of products require lead-free soldering, so the soldering temperature must be higher than that used for traditional Sn-37Pb soldering.<\/p>\n<h3>Requirements for the Peak Temperature Curve During Heating and Holding<\/h3>\n<ul>\n<li>Heating Rate: The heating rate should be limited to 0.5\u20131\u00b0C\/s or lower, depending on the requirements of the solder paste and components.<\/li>\n<li>Flux Composition: The flux composition in the solder paste must match the profile; excessively high reflow temperatures can compromise the solder paste\u2019s performance.<\/li>\n<li>Second heating ramp: The ramp at approximately 3\u00b0C\/s above the liquidus line is located at the entrance to the peak region and takes 50\u201360 seconds; the peak temperature is generally between 235 and 245\u00b0C.<\/li>\n<li>Cooling: In the cooling zone, the weld must be cooled rapidly to prevent damage, but care must be taken to minimize stress.<\/li>\n<\/ul>\n<h3>Advantages of the Peak Temperature Curve for Heating and Temperature Maintenance<\/h3>\n<ul>\n<li>Suitable for products that require precise temperature control, such as lead-free soldering.<\/li>\n<li>This ensures the quality and reliability of the solder joints.<\/li>\n<\/ul>\n<h2>3. Low-Peak Temperature Curve<\/h2>\n<h3>What is a low-peak temperature curve?<\/h3>\n<p>A low-peak temperature profile is a type of profile that requires lower\u710a\u63a5 temperatures. It is typically suitable for products that require a reduction in temperature differences across the PCB surface, particularly when large components\u2014which have high thermal capacity\u2014tend to lag behind smaller components.<\/p>\n<h3>Requirements for Low-Peak Temperature Curves<\/h3>\n<ul>\n<li>Heating and Cooling: First, heat the PCB slowly and allow it to preheat thoroughly to reduce temperature differences across its surface. Next, smaller components must wait for larger ones to ensure that all components reach their peak temperature before cooling begins.<\/li>\n<li>Applicability: The low-peak temperature profile is not suitable for all products, as it places high demands on PCB layout, thermal design, process control, and equipment.<\/li>\n<\/ul>\n<p>Proper design of the PCBA temperature profile is critical to ensuring soldering quality and product reliability. Selecting the appropriate type of temperature profile based on the product\u2019s requirements and characteristics is key to ensuring a successful manufacturing process.<\/p>\n<p>Only through proper manufacturing methods and process control, along with appropriate temperature profile design, can the product achieve high quality and reliability.<\/p>\n<hr \/>\n<h2>Frequently Asked Questions<\/h2>\n<h3><strong>1. What is a PCBA circuit board temperature profile?<\/strong><\/h3>\n<p>PCBA circuit board temperature profiles are temperature control curves used for soldering in electronics manufacturing; different types of products require different types of temperature profiles.<\/p>\n<h3><strong>2. Why is it important to select the appropriate temperature profile?<\/strong><\/h3>\n<p>Proper design of the temperature profile ensures weld quality, product reliability, and energy savings.<\/p>\n<h3><strong>3. What is lead-free soldering?<\/strong><\/h3>\n<p>Lead-free soldering is an environmentally friendly soldering process that requires the use of lead-free solder paste instead of traditional leaded solder paste.<\/p>\n<h3><strong>4. For which products are low-peak temperature curves suitable?<\/strong><\/h3>\n<p>Low-peak temperature profiles are typically suitable for products that require lower soldering temperatures, but they place higher demands on PCB layout and thermal design.<\/p>\n<h3><strong>5. Why is the welding process so complicated?<\/strong><\/h3>\n<p>Welding involves multiple physical and chemical reactions, as well as process requirements and equipment control, making it a complex manufacturing process. To ensure high quality and reliability, proper temperature curve design and process control are essential.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u5728\u7535\u5b50\u5236\u9020\u4e1a\uff0cPCBA\uff08Printed Circuit Board Assembly\uff09\u7535\u8def\u677f\u7684\u5236\u7a0b\u9700\u8981\u7ecf\u5386\u710a\u63a5 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8692,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"slim_seo":{"title":"Three Typical Temperature Curves for PCBA Circuit Boards","description":"What are the three typical temperature profiles for PCBA? Compare the temperature rise requirements, advantages, and suitable components and board types for the triangular profile, the peak-heating and holding profile, and the low-peak profile."},"_slim_seo_primary_term_category":0,"_slim_seo_primary_term_post_tag":0,"footnotes":""},"categories":[26],"tags":[177,224],"class_list":["post-3433","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-pcba","tag-224"],"_links":{"self":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/3433","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/comments?post=3433"}],"version-history":[{"count":1,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/3433\/revisions"}],"predecessor-version":[{"id":19388,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/3433\/revisions\/19388"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/media\/8692"}],"wp:attachment":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/media?parent=3433"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/categories?post=3433"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/tags?post=3433"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}