Equivalent & Substitute Parts for 1TL48-31 Toggle Switch

Part Overview

The 1TL48-31 is a toggle switch manufactured by Honeywell Sensing and Productivity Solutions, classified as an SPDT (Single Pole Double Throw) panel mount switch rated for 15A at 125V AC. This switch features a standard round actuator with a white finish and operates across a temperature range of -65°C to 71°C. The product is currently obsolete, which necessitates identification of functionally equivalent alternatives for continued system support and component replacement.

Substiute Parts

1TL48-31

Honeywell Sensing and Productivity SolutionsIn Stock: 9571TL48-31 Datasheet

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S302T

NKK SwitchesIn Stock: 1176S302T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1TL48-31 is determined by strict equivalence across the following critical parameters:

Electrical Compatibility:

• Circuit configuration must be SPDT
• Switch function must be On-On
• AC current rating must support minimum 15A
• AC voltage rating must support minimum 125V

Mechanical Compatibility:

• Mounting type must be Panel Mount
• Actuator type must be Standard Round
• Termination style must be Screw Terminal
• Panel cutout dimensions must accommodate circular 12.40mm diameter or smaller

Environmental & Compliance:

• Ingress protection must be Environment Sealed or equivalent
• RoHS compliance required
• Operating temperature range must encompass or exceed -65°C to 71°C

The S302T manufactured by NKK Switches meets all substitution criteria for the 1TL48-31.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: S302T (NKK Switches)

The S302T is the designated substitute for the obsolete 1TL48-31 based on functional equivalence across all critical electrical and mechanical parameters. Both switches share identical SPDT circuit configuration, On-On switch function, 15A AC current rating, and 125V AC voltage rating. Both employ screw terminal connections and panel mount configurations with standard round actuators.

Compliance Status: Both the 1TL48-31 and S302T maintain RoHS compliance. The S302T carries ROHS3 certification and is REACH Unaffected, indicating current regulatory alignment. The S302T is an active product with ongoing manufacturing support, whereas the 1TL48-31 is obsolete.

Mechanical Considerations: The S302T features a panel cutout diameter of 12.50mm compared to the 1TL48-31's 12.40mm, representing a 0.10mm difference that remains within standard mechanical tolerances for panel mount applications. The actuator length differs (S302T: 17.50mm versus 1TL48-31: 22.22mm), which may affect panel aesthetics but does not impact electrical function.

Bushing Thread Difference: The 1TL48-31 uses 15/32-32 thread specification while the S302T uses M12 x 1 metric thread. This difference requires verification of panel mounting hardware compatibility during installation.

Temperature Range Consideration: The 1TL48-31 operates from -65°C to 71°C, while the S302T operates from -10°C to 70°C. Applications requiring operation below -10°C must evaluate this specification difference against system requirements.

Additional Capabilities: The S302T provides supplementary DC ratings (20A at 30V DC) not specified for the 1TL48-31, and includes a documented electrical life rating of 25,000 cycles.

Frequently Asked Questions (FAQ)

Q: Can the S302T directly replace the 1TL48-31 in all applications?

A: The S302T is electrically equivalent for AC applications at 15A and 125V. However, three factors require verification: (1) Panel mounting hardware compatibility due to different bushing thread specifications (15/32-32 versus M12 x 1), (2) Actuator length difference (22.22mm versus 17.50mm) may affect panel fit and operator interface, and (3) Operating temperature range difference (-65°C to 71°C versus -10°C to 70°C) must be evaluated for low-temperature applications.

Q: What are the key electrical parameters that make S302T equivalent to 1TL48-31?

A: Equivalence is established through: SPDT circuit configuration, On-On switch function, 15A AC current rating, 125V AC voltage rating, screw terminal connections, and panel mount configuration. Both switches are non-illuminated with standard round actuators.

Q: Does the S302T's shorter actuator length affect functionality?

A: Actuator length affects panel aesthetics and operator feel but does not impact electrical switching function. The 4.72mm length difference (22.22mm to 17.50mm) may require evaluation of panel cutout depth and operator accessibility in the specific application.

Q: Are there compliance differences between the two switches?

A: Both switches are RoHS compliant. The S302T carries ROHS3 certification and is REACH Unaffected, representing current regulatory standards. The 1TL48-31 is RoHS Compliant. Both carry EAR99 ECCN classification and identical HTSUS code 8536.50.9065.

Q: What is the impact of the different bushing thread specifications?

A: The 1TL48-31 uses 15/32-32 UNS thread while the S302T uses M12 x 1 metric thread. Panel mounting hardware, washers, and lock nuts must be verified for compatibility with the S302T's metric thread specification. Existing panel cutouts may require modification or adapter hardware.

Q: Can the S302T be used in applications requiring operation below -10°C?

A: The S302T's operating temperature range is -10°C to 70°C, which does not encompass the 1TL48-31's lower limit of -65°C. Applications requiring operation below -10°C must either retain the 1TL48-31 if available or identify alternative switches with extended low-temperature specifications.

Q: What is the significance of the S302T's 25,000 cycle electrical life rating?

A: The S302T provides a documented electrical life specification of 25,000 cycles, whereas the 1TL48-31 does not specify this parameter. This rating indicates switch durability under specified electrical load conditions and supports reliability analysis for applications with defined cycle requirements.

Q: Are the panel cutout dimensions compatible?

A: The S302T requires a 12.50mm diameter circular cutout compared to the 1TL48-31's 12.40mm diameter. This 0.10mm difference is within standard mechanical tolerances. Existing panel cutouts for the 1TL48-31 will accommodate the S302T without modification.