Switchcraft 903 Pushbutton Switch SPDT Equivalent & Substitute Parts

Part Overview

The Switchcraft 903 is a pushbutton switch with SPDT (Single Pole Double Throw) configuration, rated for 250mA at 125V AC and 48V DC. It features a round button actuator with red cap, panel mount front installation, and solder lug termination. The 903 is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs requiring this switch function.

Substiute Parts

903

Switchcraft Inc.In Stock: 875903 Datasheet

Current PartRFQ

903X

Switchcraft Inc.In Stock: 2127903X Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Switchcraft 903X qualifies as a direct substitute based on identical electrical and mechanical parameters. Substitution is valid when the following criteria are met:

• Circuit configuration remains SPDT
• Switch function remains On-Momentary
• Current rating matches or exceeds 250mA (AC/DC)
• Voltage ratings meet or exceed 125V AC and 48V DC
• Mounting type is Panel Mount, Front
• Actuator type is Round Button with Red cap
• Termination style is Solder Lug

The 903X maintains all specified parameters while offering improved product status (Active vs. Obsolete) and enhanced compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The Switchcraft 903X is the appropriate substitute for the obsolete 903 model. Both parts maintain identical electrical specifications (SPDT, 250mA, 125V AC/48V DC) and mechanical form factors (panel mount, round red button, solder lug termination).

The 903X offers two significant advantages: Active product status ensures ongoing availability and manufacturer support, and ROHS3 compliance satisfies modern regulatory requirements where the original 903 does not. Both parts share identical REACH and ECCN classifications, maintaining consistent export and supply chain compliance.

For applications requiring the 903, direct substitution with the 903X is valid without circuit redesign or mechanical modification.

Frequently Asked Questions (FAQ)

Q: Can the 903X replace the 903 in existing designs? A: Yes. The 903X maintains identical electrical ratings (250mA, 125V AC, 48V DC), circuit configuration (SPDT), and mechanical specifications (panel mount, round red button, solder lug termination). Direct substitution is valid.

Q: What is the primary reason to switch from 903 to 903X? A: The 903 is obsolete with limited inventory. The 903X is an active product with 2057 units in stock, ensuring long-term availability. Additionally, the 903X meets ROHS3 compliance, addressing modern regulatory requirements.

Q: Are there packaging differences between the 903 and 903X? A: The 903 is packaged as individual units (indicated by "-" packaging notation), while the 903X is supplied in Bulk packaging. Both are suitable for solder lug termination and panel mount installation.

Q: Do the 903 and 903X have identical electrical performance? A: Yes. Both parts are rated for 250mA at 125V AC and 48V DC with SPDT On-Momentary function. Electrical performance is identical.

Q: Are there any compliance differences? A: The 903X is ROHS3 compliant, while the 903 is RoHS non-compliant. Both share identical REACH Unaffected status and EAR99 ECCN classification.