Description
Sierra TG40040-1 3-Blade SPDT On-Off-On Toggle Switch
The Sierra TG40040-1 is a standard polyester marine toggle switch designed for 12VDC electrical control applications requiring an SPDT On-Off-On function. With 3 blade terminals, a non-corrosive plastic body, brass terminals, and silver contacts, this switch is a practical replacement for boat dash panels, accessory circuits, and marine rigging applications where this exact switch type is specified.
Key Features
- Sierra TG40040-1 standard polyester marine toggle switch
- SPDT On-Off-On switch function for compatible control circuits
- 3 blade terminals for matching marine electrical wiring applications
- Standard black toggle handle for a clean panel appearance
- Non-corrosive plastic construction suited for marine environments
- Brass blade terminals with silver contacts for reliable conductivity
- Designed for 12VDC marine electrical systems
Product Details
- Brand: Sierra
- Part Number: TG40040-1
- Alternate Part Number: TG400401
- Product Type: Polyester marine toggle switch
- Switch Function: SPDT On-Off-On
- Terminal Style: 3 blade terminals
- Handle Style: Standard black toggle
- Mounting Stem: 15/32 inch length with 15/32-32 thread
- Application: Compatible marine electrical panels and 12VDC circuits where this exact SPDT switch type is specified
Why You Should Buy
- Ideal replacement switch for marine circuits requiring SPDT On-Off-On control
- Simple 3-blade layout makes matching and installation straightforward
- Marine-ready construction supports dependable use on boat panels and accessories
- Useful for repairs, refits, and custom 12VDC rigging projects
- Easy to confirm by matching Sierra part number TG40040-1, SPDT function, terminal count, and mounting requirements
Common Applications
- Boat dash and helm switch panels
- Marine accessory control circuits
- 12VDC electrical switching applications
- Outboard, sterndrive, and general marine rigging projects
- Applications requiring a 3-blade SPDT On-Off-On toggle switch
FAQ
- What switch function does Sierra TG40040-1 use? Sierra TG40040-1 uses an SPDT On-Off-On switch function.
- How many terminals does this switch have? This switch has 3 blade terminals.
- Is this switch illuminated? No, this is a standard non-illuminated toggle switch.
- What mounting stem size does it use? This switch uses a 15/32 inch length stem with 15/32-32 thread.
- How do I confirm compatibility? Match part number TG40040-1 or TG400401, SPDT On-Off-On function, 3-blade terminal layout, mounting stem size, and circuit requirements before installation.

