Grayhill 49-01 Pushbutton Switch SPST-NO Equivalent & Substitute Parts

Part Overview

The Grayhill 49-01 is a pushbutton switch with SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration, rated for 0.4VA at 20V AC/DC. This component features a standard through-hole, right-angle mounting design with a round plunger actuator and process-sealed plunger construction. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

49-01

Grayhill Inc.In Stock: 115549-01 Datasheet

Current PartRFQ

EP11SD1AGE

C&KIn Stock: 827EP11SD1AGE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Grayhill 49-01 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Circuit configuration: SPST-NO
• Current rating: 0.4VA (AC/DC)
• Voltage rating: 20V AC and 20V DC minimum
• Mounting type: Through hole, right angle
• Switch function: Off-Mom (momentary action)
• Actuator type: Round plunger
• Termination style: PC pin
• Operating temperature range: -30°C to 85°C or wider

The C&K EP11SD1AGE meets all mandatory substitution criteria. While this substitute exhibits differences in product status (active vs. obsolete), actuator color (black vs. white), sealing method (epoxy vs. process sealed), electrical life (60,000 vs. 40,000 cycles), ingress protection (IP57 vs. unspecified), and RoHS compliance (ROHS3 vs. non-compliant), these variations do not affect functional interchangeability in applications requiring the specified electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The C&K EP11SD1AGE provides functional equivalence to the Grayhill 49-01 across all electrical and mechanical parameters required for SPST-NO pushbutton switch applications at 0.4VA, 20V with through-hole, right-angle mounting.

Product Status Consideration: The Grayhill 49-01 is classified as obsolete. The C&K EP11SD1AGE maintains active product status, ensuring ongoing availability and manufacturer support for new procurement and design revisions.

Compliance Advantage: The C&K EP11SD1AGE achieves ROHS3 compliance, whereas the Grayhill 49-01 is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the substitute part satisfies compliance obligations.

Enhanced Performance Characteristics: The C&K EP11SD1AGE provides extended electrical life (60,000 cycles vs. 40,000 cycles) and IP57 ingress protection rating, offering improved durability and environmental sealing compared to the original part.

Frequently Asked Questions (FAQ)

Q: Can the C&K EP11SD1AGE directly replace the Grayhill 49-01 in existing designs?

A: Yes. Both parts share identical electrical ratings (0.4VA, 20V AC/DC), circuit configuration (SPST-NO), switch function (Off-Mom), mounting type (through-hole, right-angle), actuator type (round plunger), termination style (PC pin), and operating temperature range (-30°C to 85°C). These parameters define functional interchangeability for SPST-NO pushbutton switch applications.

Q: What are the differences between these parts?

A: Differences exist in product status (obsolete vs. active), actuator color (white vs. black), sealing method (process sealed vs. epoxy sealed terminals), electrical life rating (40,000 vs. 60,000 cycles), ingress protection (unspecified vs. IP57), and RoHS compliance status (non-compliant vs. ROHS3 compliant). These variations do not affect electrical or mechanical compatibility.

Q: Does the actuator color difference affect functionality?

A: No. Actuator color is a visual identifier only and does not impact electrical performance, switching characteristics, or mechanical operation.

Q: Is the higher electrical life rating of the C&K part a concern for compatibility?

A: No. Higher electrical life rating indicates extended component durability. This represents an improvement over the original specification and does not create compatibility issues.

Q: What is the significance of IP57 ingress protection on the substitute part?

A: IP57 rating indicates dust protection and waterproof sealing. The original Grayhill 49-01 does not specify an ingress protection rating. The C&K EP11SD1AGE provides enhanced environmental protection, beneficial for applications exposed to moisture or particulate contamination.

Q: Does RoHS compliance of the substitute affect compatibility?

A: No. RoHS compliance is a material composition and manufacturing standard. The C&K EP11SD1AGE's ROHS3 compliance ensures regulatory alignment for applications subject to RoHS directives, without affecting electrical or mechanical interchangeability.

Q: Are there packaging differences between these parts?

A: The Grayhill 49-01 is packaged in standard format. The C&K EP11SD1AGE is supplied in bulk packaging. Packaging format does not affect component functionality or substitution eligibility.