The RA Series transient surge suppressors are varistors (MOVs) supplied in a low-profile box that features a precise seating plane to increase mechanical stability for secure circuit-board mounting. This feature makes these devices suitable for industrial applications critical to vibration. Their construction permits operation up to 125oC (ambient) without derating. The RA series are available in voltage ratings up to 275V VM(AC)RMS, and energy levels up to 140J. These varistors are used in automotive, motor-control, telecommunication, and military applications. See RA Series Device Ratings and Specifications table for part number and brand information.
The RA Series low‑profile varistors are supplied in a compact box with a precise seating plane for secure PCB mounting, making them suitable for industrial, automotive, motor‑control, telecommunication, and military applications. They operate up to 125 °C ambient without derating and are available in three model sizes: RA8, RA16, and RA22.
The datasheet lists absolute maximum ratings, continuous and transient voltage ranges, energy absorption capability up to 140 J, peak pulse currents, power‑dissipation limits, and mechanical dimensions. It also includes UL and CSA agency approvals and detailed surge‑current curves.
| Operating Voltage Range (AC RMS) | 4 V to 275 V |
|---|---|
| Maximum Energy Absorption (WTM) | up to 140 J |
| Ambient Temperature Range | -55 °C to 125 °C |
| Maximum Continuous Voltage (DC) | 5.5 V to 369 V |
The RA series can absorb up to 140 J of energy.
The devices operate from –55 °C up to 125 °C ambient without derating.
The series is offered in three sizes: RA8, RA16, and RA22.
Yes, they are recognized under UL File No. E75961.