{"id":38204,"date":"2025-11-05T13:55:57","date_gmt":"2025-11-05T13:55:57","guid":{"rendered":"https:\/\/calibration.consulting\/product\/ohm-labs-custom-precision-wire-wound-resistors\/"},"modified":"2025-11-05T13:55:57","modified_gmt":"2025-11-05T13:55:57","slug":"ohm-labs-custom-precision-wire-wound-resistors","status":"publish","type":"product","link":"https:\/\/calibration.consulting\/en\/product\/ohm-labs-custom-precision-wire-wound-resistors\/","title":{"rendered":"Ohm-Labs Custom Precision Wire-Wound Resistors"},"content":{"rendered":"

For applications requiring exceptional accuracy and reliability, Ohm-Labs<\/a> offers a range of custom-made wirewound resistors. These components are designed for customers who demand the highest standards in measurement stability, temperature behaviour and service life. Ohm-Labs manufactures these resistors exclusively to special order, with a range from 0.01 \u03a9 to 10 M\u03a9. Thanks to the acquisition of production and material lines from Leeds & Northrup, Honeywell and Julie Research Labs, we can continue to supply original designs with the corresponding materials and specifications. OEM part numbers from these brands can be supplied directly for a quotation.<\/p>\n

Various models and types<\/strong><\/h3>\n

The series consists of several models, each optimised for specific applications:<\/p>\n

R-type:<\/strong> Epoxy-encapsulated resistors, suitable for standard applications with 2- or 4-wire connections.
\nH-type:<\/strong> Hermetically sealed, oil-filled resistors for maximum stability and protection against environmental influences.
\nT-type:<\/strong> Radial \u201cTop Hat\u201d resistors with compact mounting form, ideal for applications with limited space.<\/p>\n

Within each type, different sizes are available, varying in diameter and length. The choice between 2-wire and 4-wire construction depends on the desired accuracy; 4-wire is recommended for resistors below 10 ohms.<\/p>\n

Specifications and customisation<\/h3>\n

Customers can specify their desired accuracy, from 0.1% to as low as 0.001%, with corresponding temperature coefficients (TCR) of less than 20 ppm\/\u00b0C to even below 1 ppm\/\u00b0C. The resistors are supplied with solid lead wires (22 to 18 AWG), and for higher power ratings, an -HK version with heat sink is available. For applications where multiple resistors must be precisely matched, such as ratio matching, Ohm-Labs also offers custom-matched sets.<\/p>\n

Accuracy and TCR options<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n
Code<\/strong><\/th>\nAccuracy<\/strong><\/th>\nTCR (ppm\/\u00b0C)<\/strong><\/th>\n<\/tr>\n<\/thead>\n
A<\/td>\n0.1%<\/td>\n< 20<\/td>\n<\/tr>\n
B<\/td>\n0.05%<\/td>\n< 10<\/td>\n<\/tr>\n
C<\/td>\n0.025%<\/td>\n< 5<\/td>\n<\/tr>\n
D<\/td>\n0.01%<\/td>\n< 3<\/td>\n<\/tr>\n
E<\/td>\n0.005%<\/td>\n< 1<\/td>\n<\/tr>\n
F<\/td>\n0.0025%<\/td>\n< 1<\/td>\n<\/tr>\n
G<\/td>\n0.001%<\/td>\n< 1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

    \n
  • High accuracy<\/li>\n
  • Low temperature coefficients<\/li>\n
  • High immunity from environmental effects<\/li>\n
  • High reliability<\/li>\n
  • From 0.01 \u2126 to 10 M\u2126<\/li>\n<\/ul>\n","protected":false},"featured_media":38201,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_seopress_titles_title":"Ohm-Labs Custom Precision Wire-Wound Resistors","_seopress_titles_desc":"For applications requiring exceptional accuracy and reliability, Ohm-Labs offers a range of custom-made wirewound resistors.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[]},"product_brand":[],"product_cat":[250,249],"product_tag":[],"class_list":["post-38204","product","type-product","status-publish","has-post-thumbnail","product_cat-electrical-calibration","product_cat-calibration-en","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product\/38204","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/comments?post=38204"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/media\/38201"}],"wp:attachment":[{"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/media?parent=38204"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product_brand?post=38204"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product_cat?post=38204"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/calibration.consulting\/en\/wp-json\/wp\/v2\/product_tag?post=38204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}