Monopolar electrode tips · Insulation and rated accessory voltage, coating adhesion and pull-out, biocompatibility, EO residues, tissue tests
A high-frequency electrosurgical electrode is the conductive tip, blade, needle or ball, that fits into an electrosurgical pencil and delivers radiofrequency current from the generator to cut or coagulate tissue, with insulation on the shaft so current only leaves at the tip. Ask three things first: the rated accessory voltage and insulation tests, the coating and attachment tests, and the biocompatibility, sterilisation and regulatory status in your market.
Monopolar electrode tips (blade, needle, ball, loop) for electrosurgical pencils, coated or uncoated, single-use or reusable. Electrosurgical generators, pencils, return pads, bipolar instruments and laparoscopic devices are outside this page.
CNFX editorial research · Sources checked October 11, 2026 · 5 sources
The 510(k) summary for the Edge Insulated Blade Electrode (K210338) describes a sterile single-use monopolar stainless-steel blade with coating and insulation that fits pencils with a 0.093 in insertion diameter. It lists a rated accessory voltage below 4500 Vpk against below 10.8 kV for its predicate, compliance with IEC 60601-1 and IEC 60601-2-2 for electrical safety and IEC 60601-1-2 for EMC, and ex vivo testing of thermal effect across power settings, modes and tissue types. [1]
The 510(k) summary for a disposable general electrode family (K152059) explains that the insulation, polyolefin or PTFE shrink wrap or ABS/HIPS overmould on a stainless-steel shaft about 2.36 mm in diameter, prevents accidental conduction of current from the shaft to the patient. It reports comparative cutting tests on porcine kidney, liver and muscle at 50, 100, 200 and 300 W and coagulation at 50 and 100 W, including eschar build-up on the tip. [3]
Editorial note: ask the supplier which generators and output modes the rated accessory voltage was assessed against, and compare them with the generators you use.
Give the supplier the electrode shapes and lengths, pencil insertion diameter, coating (e.g. PTFE non-stick), insulation, rated accessory voltage needed for your generators, sterilisation method, packaging, and regulatory clearances required.
02
Check coating, attachment, biocompatibility and residues
The 510(k) summary for Unimed Surgical coated electrosurgical electrodes (K132224) lists physical tests of minimum coating adhesion of 3.5 lb and a minimum 10 lb pull test for attachment to the pencil per IEC 60601-2-2, coating performance of aged devices under normal and extreme use, dielectric strength and hipot tests per IEC 60601-2-2, ISO 10993-1 biocompatibility of coatings and insulation, and shelf life confirmed by accelerated ageing. [2]
The Edge summary lists cytotoxicity, sensitisation, intracutaneous reactivity, acute systemic toxicity and material-mediated pyrogenicity tests for its stainless-steel, silicone and polymer insulation materials, and ethylene oxide sterilisation. [1] The K152059 summary sets ethylene oxide residue at no more than 4 mg and ethylene chlorohydrin at no more than 10 mg per device under ISO 10993-7. [3]
Editorial calculation: 3.5 lb is about 15.6 N and 10 lb about 44.5 N of force. [2]
03
Weigh coating type against measured thermal damage
Bench and animal studies give measured effects of blade coating on tissue damage, which is what the coating on a monopolar electrode is bought for. A 2024 study from the National University of Ireland, Galway with Stryker engineers compared manual and robotic cutting in porcine muscle across electrodes, coatings and power settings; it reports that a ceramic coating reduced lateral thermal damage by 86.15% at 35 W and by 65% at 50 W, and that under robotic cutting one ceramic-coated device reduced thermal damage (midline 47.42%, lateral 33.06%) while the other coated electrode showed increased thermal spread (midline 66.57%, lateral 245.72%). The authors conclude that thermal damage depended on surgical variability and on the specific characteristics of each device. [4]
A 2017 porcine skin-incision study by Stanford, Utah and Ethicon authors reports that at time 0 a nonstick PTFE-coated electrosurgical blade produced twice the thermal tissue damage of the MEGADYNE ACE BLADE 700 with its advanced waveform, while the scalpel produced none; scars at 6 weeks were wider for the standard electrosurgical blade, and its cosmetic results were inferior to ACE with an odds ratio of 53.4 (p<0.001). Six pigs were evaluated at 0, 1, 2, 3 and 6 weeks. [5]
Editorial note: both studies show that the coating name alone does not predict tissue effect, because generator waveform and power change the result. Ask a supplier for thermal-spread or histology data on the coated tip at the power settings you use, alongside the coating-adhesion and dielectric tests listed in the 510(k) summaries. [4][5][2]
Study finding
Condition
What to ask the supplier
Ceramic coating cut lateral thermal damage by 86.15%. [4]
PTFE-coated needle, blade and ball tips, LLETZ loops and bayonet electrodes
Listings include PTFE-coated and standard needle, blade and ball electrodes, LLETZ loop electrodes and bayonet electrodes, alongside pencils and return pads.
05
Active tip, coating, shaft insulation, conductive post and sterile pack
Each part maps to a test in the cited clearances: coating adhesion and pull-out of the post in K132224, insulation against unintended conduction and EO residues in K152059. [2][3]
Rated voltage, insulation, tip and shaft size, pencil fit and sterilisation for an electrode order
Read the voltage row against your own generators: the Edge blade is rated below 4500 Vpk while its predicate is rated below 10.8 kV, so tips of the same shape can carry very different ratings. [1]
1 company lists this product among what they make. Company figures are quoted from each
company's own website; every card states where the relationship came from.
Cathay Manufacturing Corp.
Manufacturing site to be confirmed for the order
Lists PTFE-coated and standard needle, blade, LLETZ and bayonet electrodes with ESU pencils and return pads.
Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.
Share this page
Compiled and source-reviewed by the CNFX editorial team.
Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review
· Page last updated 13 October 2026
Buyer questions
What rated voltage do electrosurgical electrodes carry?
It varies; one cleared insulated blade electrode is rated below 4500 Vpk and its predicate below 10.8 kV. [1]
What tests do coated electrodes pass?
One 510(k) lists 3.5 lb coating adhesion, 10 lb pull-out, dielectric strength and hipot per IEC 60601-2-2, and ISO 10993-1 biocompatibility. [2]
What EO residue limits apply?
One cleared disposable electrode family cites EO at most 4 mg and ECH at most 10 mg per device under ISO 10993-7. [3]
Does a coated electrosurgical electrode reduce thermal damage?
It depends on the device: a 2024 porcine study found a ceramic coating cut lateral thermal damage by 86.15% at 35 W and 65% at 50 W, but under robotic cutting a different coated electrode increased lateral spread by 245.72%. [4]
Sources and what still needs a direct check
Sources checked 2026-10-11. The FDA 510(k) summaries were submitted by device makers; they show tests for those devices, not limits for every electrode. IEC 60601-2-2 and ISO 10993 govern the tests. Two porcine studies (Int J Hyperthermia 2024; Med Res Innov 2017) report measured thermal damage for coated and uncoated blades.
