PT-RD AC Series — Surge Protetion Device

DynaShield® PT-RD AC Surge Suppression

The RD Series is designed to protect single phase low voltage AC power supply system against transient surges at LPZ1 and higher. The SPDs are ANSI/UL 1449 4th Edition Type 4 recognized components for use in Type 2 applications. Ideal for use in SCADA Systems, PLCs, and most other sensitive electronic equipment.

  • UL 1449 4th Edition Type 4 for use in Type 2 applications
  • SCCR 100 kAIC
  • Series or parallel installation
  • Screw or DIN mount
  • LED Status
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DynaShield Applications

ALLTEC’s Protection Pyramid depends on DynaShield® products to support its comprehensive facility framework. The second tier of protection diminishes the significance of random high-energy, short-duration electrical power transients through properly installed surge protective devices. These occurrences are typically caused by atmospheric phenomena (such as lightning strikes), utility switching, inductive loads, and internally generated overvoltages. You can view typical installation locations in the application maps to the right by locating the numbers 5 and 6.

Model PT-RD-20-120V-30 PT-RD-20-250V-30 PT-RD-40-120V-30 PT-RD-40-250V-30
Tested To UL 1449 4th Edition
SPD Category Type 4 for use in Type 2 applications
Number Of Ports  Two Port Device
Technology Metal Oxide Varistor (MOV)
Nominal Operating Voltage UN 120 Vac 240 Vac 120 Vac 240 Vac
Maximum Current 30 A
Maximum Continuous Operating Voltage UC  140 V 260 V 140 V 260 V
Nominal Discharge Current
IN (8 x 20 μs)
3 kA 3 kA 3 kA 3 kA
Maximum Discharge Current
Imax (8 x 20 μs)
20 kA 20 kA 40 kA 40 kA
Voltage Protection Rating
Vpr @ IN
 (L-N) 600 V 800 V 500 V 800 V
(L-PE) 600 V 800 V 500 V 800 V
(N-PE) 600 V 800 V 600 V 800 V
Response Time ≤ 25 ns
Visual Status Indication LED: Green = Normal, Dark = Replace
Location Category Indoor Only
Method of Mounting Wall mount or Fixed 35 mm DIN rail
Dimension (H x W x D) 3.94” x 2.8” x 2.3”
100 mm x 71.1 mm x 57.9 mm
3.94” x 1.4” x 2.3″
100 mm x 35.6 mm x 57.9 mm
Weight (Max) 0.5 lbs (0.25 kg) 0.9 lbs (0.45 kg)
Maximum Wire Size #6 AWG
Multistrand 13 mm2
Operating Temperature -40° F to +176° F (-40° C to +80° C)
Relative Humidity ≤ 95% non-condensing
Altitude ≤ 3000 m
Enclosure Protection Level IP 20
Housing Inflammability Rating Thermoplastic, UL 94 V-0

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