SMS03NC Equivalent & Substitute Parts Reference

Part Overview

The SMS03NC is a magnetic interlock switch manufactured by Carlo Gavazzi Inc., designed as a 3PST (3-pole, single-throw) configuration with 2NO/1NC circuit arrangement. This component operates as a non-contact magnetic switch with wire lead termination, rated for 250mA AC at 100VAC supply voltage. The SMS03NC is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing maintenance, repair, and system continuity in applications requiring magnetic interlock switching functionality.

Substiute Parts

SMS03NC

Carlo Gavazzi Inc.In Stock: 1152SMS03NC Datasheet

Current PartRFQ

MC88CH2O1CRA2

Carlo Gavazzi Inc.In Stock: 850MC88CH2O1CRA2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SMS03NC has been identified with one manufacturer-recommended substitute: MC88CH2O1CRA2, also from Carlo Gavazzi Inc. Substitution eligibility is determined by the following critical parameters:

• Magnetic actuation principle: Both components utilize non-contact magnetic switching technology
• Supply voltage compatibility: The SMS03NC operates at 100VAC; the substitute operates at 12V–24V, representing a different voltage class
• Current handling capacity: The SMS03NC is rated for 250mA AC; the substitute specification does not explicitly state current rating
• Contact configuration: The SMS03NC provides 3PST-2NO/1NC; the substitute provides 2NO output configuration
• Operating temperature range: SMS03NC operates -25°C to 70°C; substitute operates -25°C to 80°C
• Ingress protection: SMS03NC is IP67; substitute package type is flange mount
• Termination: SMS03NC uses wire leads; substitute uses cable termination

Parameter Comparison

Engineering Selection Recommendations

The MC88CH2O1CRA2 is the manufacturer-designated substitute for the obsolete SMS03NC. As an active product from the same manufacturer, it provides continuity for applications requiring magnetic switching functionality. However, direct substitution requires verification of the following:

• Voltage class transition: The SMS03NC operates at 100VAC, while the MC88CH2O1CRA2 operates at 12V–24V. System voltage compatibility must be confirmed before implementation.
• Contact configuration differences: The SMS03NC provides 3PST-2NO/1NC configuration; the MC88CH2O1CRA2 provides 2NO output. Application logic must accommodate this circuit difference.
• Termination method change: Wire lead termination (SMS03NC) differs from cable termination (MC88CH2O1CRA2), requiring connector or wiring adaptation.
• Package and mounting: The SMS03NC is IP67-rated; the MC88CH2O1CRA2 uses flange mount configuration, affecting installation methodology.

Frequently Asked Questions (FAQ)

Q: Can the MC88CH2O1CRA2 directly replace the SMS03NC without modifications?

A: Direct replacement is not possible without system modifications. The substitute operates at a different voltage class (12V–24V versus 100VAC), has different contact configuration (2NO versus 3PST-2NO/1NC), and uses cable termination instead of wire leads. Integration requires electrical redesign and mechanical adaptation.

Q: What is the primary difference between the SMS03NC and MC88CH2O1CRA2?

A: The SMS03NC is a 3PST magnetic interlock switch for 100VAC applications with wire lead termination. The MC88CH2O1CRA2 is a reed switch magnetic sensor for low-voltage DC/AC applications (12V–24V) with cable termination and 2NO output configuration.

Q: Why is the SMS03NC obsolete?

A: The SMS03NC is classified as obsolete by the manufacturer. The MC88CH2O1CRA2 represents the current-generation alternative for magnetic switching applications within the Carlo Gavazzi product portfolio.

Q: Are there compatibility considerations for operating temperature?

A: The MC88CH2O1CRA2 has a slightly extended upper operating temperature limit (80°C versus 70°C for the SMS03NC). Both components operate across the same lower temperature threshold (-25°C). Application temperature requirements must fall within both ranges for compatibility.

Q: What termination changes are required when switching from SMS03NC to MC88CH2O1CRA2?

A: The SMS03NC uses wire leads for direct connection; the MC88CH2O1CRA2 uses cable termination. Wiring harnesses and connector interfaces must be adapted accordingly during integration.