350 Series - 3-Phase Voltage/Phase Monitor

Series: 350 Questions? Contact Littelfuse Support
Littelfuse Voltage Monitoring Relays
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The 350 is a heavy-duty voltage monitor. This product should be used when high current relays or dual contacts are required, or 480V controls are used. Since the 350 uses heavy-duty relays, it comes in fixed voltage range models rather than a dual autoranging version like the Model 250.

The 350-200 has a 15A general purpose contact. The 350-400 provides a SPDT (Form C) relay rated to switch up to 600V, allowing the use of 480V controls, eliminating the need for a control power transformer to step the voltage down to 120-240V. Several DPDT (two Form C contacts) relay models are also available.

The 350 microcontroller-based family of products are low cost yet highly advanced solutions to heavy-duty problems. The 350 includes advanced single LED diagnostics. Five different light patterns distinguish faults and normal operating conditions. Other options such as high voltage trip and adjustable restart delay are available.

Product Literature

For Technical Questions

Call +1 800-832-3873 or email us at relays@littelfuse.com 

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)		Output
Form		Termination TypeMounting MethodDimensionsWeight (lbs/g)Compare
350200190 to 240VACSPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
3502002190 to 240VACSPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
35020026190 to 240VACDPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
35020028190 to 240VACDPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
35020029190 to 240VACSPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
350400380 to 480VACSPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
3504002380 to 480VACSPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
35040025380 to 480VACDPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
35040026380 to 480VACDPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
35040028380 to 480VACDPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
35040029380 to 480VACSPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
350600475 to 600VACSPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
3506002475 to 600VACSPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
35060026475 to 600VACDPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
35060028475 to 600VACDPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)
35060029475 to 600VACSPDTTorque: 7in-lbs; Wire Size: 12-18AWG#8 screws2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)1.1 lbs (16.8 oz. 476.3g)