SM0446/2/INS/BL Equivalent & Substitute Parts

Part Overview

The SM0446/2/INS/BL is a pushbutton switch manufactured by Bulgin, configured as a Double Pole Double Throw (DPDT) switch with a 2A AC rating at 250V. This component features a standard panel mount rear configuration with a blue mushroom actuator and solder lug termination. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations where this switch type is required.

Substiute Parts

SM0446/2/INS/BL

BulginIn Stock: 1107SM0446/2/INS/BL Datasheet

Current PartRFQ

EB2085-BA

NKK SwitchesIn Stock: 725EB2085-BA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SM0446/2/INS/BL is determined by the following critical parameters:

Circuit and Function Requirements: The substitute must maintain DPDT configuration with On-On switching function to preserve electrical behavior in the target application.

Electrical Ratings: The substitute must support the application's voltage and current demands. The SM0446/2/INS/BL operates at 250V AC with 2A capacity. Substitutes with equal or higher ratings in both voltage and current are electrically compatible.

Mechanical Interface: Panel mount rear configuration with solder lug termination must be maintained. Panel cutout diameter is a critical mechanical constraint for physical installation.

Environmental and Compliance: Operating temperature range and RoHS3 compliance status ensure the substitute functions within specified environmental conditions and meets regulatory requirements.

The identified substitute, EB2085-BA, satisfies these core substitution criteria while maintaining functional equivalence for DPDT switching applications.

Parameter Comparison

Engineering Selection Recommendations

The EB2085-BA from NKK Switches is the manufacturer-recommended substitute for the obsolete SM0446/2/INS/BL. Both components maintain DPDT configuration with On-On switching function and solder lug termination, ensuring functional compatibility in panel mount rear applications.

The EB2085-BA carries active product status, ensuring ongoing availability and supply chain continuity. Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Critical Design Consideration: The panel cutout diameter differs significantly between the two components (12.00mm for SM0446/2/INS/BL versus 6.35mm for EB2085-BA). Physical panel modifications are required if retrofitting the EB2085-BA into existing installations designed for the original component.

Voltage Rating Difference: The EB2085-BA operates at 125V AC maximum, compared to the 250V AC rating of the original component. Applications requiring 250V operation must verify that the substitute's 125V rating is compatible with the actual system voltage before implementation.

Frequently Asked Questions (FAQ)

Q: Can the EB2085-BA directly replace the SM0446/2/INS/BL without panel modifications?

A: No. The panel cutout diameter differs (12.00mm versus 6.35mm). Physical panel drilling or modification is required for mechanical installation of the EB2085-BA.

Q: What is the voltage compatibility between these two switches?

A: The SM0446/2/INS/BL is rated for 250V AC, while the EB2085-BA is rated for 125V AC. The substitute is suitable only for applications operating at 125V or lower. Systems requiring 250V operation cannot use the EB2085-BA as a substitute.

Q: Are both components RoHS compliant?

A: Yes. Both the SM0446/2/INS/BL and EB2085-BA are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the current rating difference, and does it affect substitution?

A: The EB2085-BA has a 3A AC rating compared to the 2A AC rating of the SM0446/2/INS/BL. The higher current rating of the substitute provides additional capacity and does not restrict substitution in applications requiring 2A or less.

Q: Does the EB2085-BA have documented mechanical and electrical life specifications?

A: Yes. The EB2085-BA specifies 100,000 mechanical cycles and 25,000 electrical cycles. The original SM0446/2/INS/BL does not provide these specifications in available documentation.

Q: What is the operating temperature range compatibility?

A: The SM0446/2/INS/BL operates from -20°C to 70°C, while the EB2085-BA operates from -10°C to 70°C. Applications requiring operation below -10°C cannot use the EB2085-BA as a substitute.