LL1105BF065Q Equivalent & Substitute Parts

Part Overview

The LL1105BF065Q is a tactile switch manufactured by E-Switch, classified as SPST-NO (Single Pole Single Throw - Normally Open) with a contact rating of 0.05A at 12VDC. This component features top actuation, through-hole mounting, and a 6.00mm x 6.00mm outline suitable for PCB integration. The product is currently obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production runs and legacy system maintenance.

Substiute Parts

LL1105BF065Q

E-SwitchIn Stock: 831LL1105BF065Q Datasheet

Current PartRFQ

LL1105PF065Q

E-SwitchIn Stock: 764LL1105PF065Q Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LL1105BF065Q is determined by strict equivalence across the following critical parameters:

Circuit configuration must remain SPST-NO to maintain electrical functionality in off-momentary switch applications. Contact rating of 0.05A @ 12VDC establishes the maximum current and voltage handling capability and cannot be reduced. Mounting type must be through-hole to ensure PCB compatibility without redesign. Outline dimensions of 6.00mm x 6.00mm define the footprint constraint on the printed circuit board. Operating force of 65gf and switch travel of 0.25mm define tactile feedback and actuation characteristics. Mechanical life of 5,000,000 cycles establishes durability requirements. Operating temperature range of -20°C ~ 70°C defines environmental operating limits. RoHS3 compliance and MSL Level 1 classification ensure regulatory and handling compatibility.

The LL1105PF065Q qualifies as a direct substitute based on identical values across all critical parameters, with the exception of actuator height off PCB (8.50mm versus 9.50mm) and product status (Active versus Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The LL1105PF065Q is the manufacturer-recommended substitute for the obsolete LL1105BF065Q. Both components maintain identical electrical specifications, mechanical durability ratings, and regulatory compliance certifications. The LL1105PF065Q carries Active product status, ensuring continued availability and supply chain support. The 1.00mm reduction in actuator height (from 9.50mm to 8.50mm) represents a minor mechanical variation that does not affect electrical function or circuit compatibility. Both parts maintain ROHS3 compliance and MSL Level 1 classification, confirming equivalent handling and environmental requirements. Selection of the LL1105PF065Q eliminates obsolescence risk while preserving functional equivalence in SPST-NO tactile switch applications rated at 0.05A @ 12VDC.

Frequently Asked Questions (FAQ)

Q: Can the LL1105PF065Q be used as a direct replacement for the LL1105BF065Q in existing designs?

A: Yes. Both components share identical electrical specifications (SPST-NO, 0.05A @ 12VDC), mechanical characteristics (65gf operating force, 0.25mm travel, 5,000,000 cycle life), and regulatory compliance (ROHS3, MSL 1). The 1.00mm difference in actuator height does not affect electrical function or PCB footprint compatibility.

Q: What is the significance of the actuator height difference between these parts?

A: The LL1105BF065Q has an actuator height of 9.50mm, while the LL1105PF065Q measures 8.50mm. This 1.00mm variation affects only the vertical clearance above the PCB surface and does not impact electrical performance, contact rating, or mechanical durability. Design review should confirm adequate clearance in the enclosure or assembly.

Q: Are there any compliance or certification differences between these parts?

A: No. Both components are ROHS3 compliant, carry MSL Level 1 classification, and maintain REACH Unaffected status. Regulatory and handling requirements are identical.

Q: Why is the LL1105BF065Q listed as obsolete?

A: The LL1105BF065Q has been discontinued by the manufacturer. The LL1105PF065Q remains in active production and serves as the current equivalent offering from E-Switch within the LL1105 series.

Q: What parameters must remain constant when selecting a substitute tactile switch?

A: Circuit configuration (SPST-NO), contact rating (0.05A @ 12VDC), mounting type (through-hole), outline dimensions (6.00mm x 6.00mm), operating force (65gf), switch travel (0.25mm), and mechanical life (5,000,000 cycles) must all remain unchanged to ensure functional equivalence and PCB compatibility.