News

New Lineup of Anti-Sulfur Chip Resistors Complied with Sulfur Gas Testing

2026.05.29

High anti-sulfur performance is achieved by using a special protective coating material

RK73-KT

KOA has expanded its lineup of anti-sulfur chip resistors with RK73-KT in order to meet the growing market demand for sulfur gas testing(ASTM B809-95/EIA-977), in addition to RK73-RT designed for sulfurization oil testing.
RK73-KT achieves superior resistance to sulfurization compared to general-purpose chip resistors by using a special protective coating material.
KOA also plans to expand the lineup to include sizes from 0603 to 1206 inch size.

(Applications)
Car electronics, industrial equipment, power supply,home appliances, telecommunications equipment, measuring instruments, etc.
Please contact us for details.

Type Size
(inch)
 Power
rating (W)
Terminal part
temp. (℃)
T.C.R.
(×10-6/K)
Resistance
range
RK73B 1E KTNEW
0402 0.1 125 ±200 1~1M
RK73H 1E KTNEW ±100 10~1M
 
Type Size
(inch)
Terminal part
temp. (℃)
Resistance
range (Ω)
Current
Rating (A)
 Max. Overload
Current (A)
RK73Z 1E KTNEW
0402 125 50m max 1 2

Sulfur Gas Testing(ASTM B809-95/EIA-977)

Compared to general-purpose chip resistors, it is less susceptible to sulfurization-induced open failures, ensuring reliable use even in sulfur environments.