Honeywell
4TL887-3D - Military-Spec Sealed Toggle Switch with Locking Lever 4PDT 15A 125V
Electromechanical Switches · Honeywell
MPN4TL887-3D
Positive Locking Mechanism: 26.67mm lever requires deliberate force to prevent inadvertent switching Extended Temperature Range: Operates flawlessly from Arctic -65°C to desert-hot +71°C Military-Grade Construction: Tested to withstand vibration, shock, and environmental extremes
- Series
- Honeywell TL
- Circuit Configuration
- 4PDT (4 Form C)
- Switch Function
- On-On
- Current Rating
- 15A AC
- Voltage Rating
- 125V AC
- Actuator Type
- Locking Lever
- Professional sourcingVetted supply chain with documented traceability
- Genuine partsDocumented traceability on every shipment
- ESD-safe handlingOriginal packaging, moisture controlled
- Worldwide shippingConsolidated freight to 100+ countries
Specifications
Core ratings and package details for this electromechanical switches (4TL887-3D). Use the table below when comparing drop-in options or validating a schematic callout.
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Series | Honeywell TL | Actuator Length | 26.67mm |
| Circuit Configuration | 4PDT (4 Form C) | Termination Style | Screw Terminal |
| Switch Function | On-On | Panel Cutout | 12.40mm diameter |
| Current Rating | 15A AC | Bushing Thread | 15/32-32 UNF |
| Voltage Rating | 125V AC | Ingress Protection | Environment Sealed |
| Actuator Type | Locking Lever | Contact Material | Silver Alloy |
Product Overview
Application context for 4TL887-3D (Honeywell · Electromechanical Switches) — what the part is for, how it is typically used, and the design points buyers ask about first.
- Positive Locking Mechanism: 26.67mm lever requires deliberate force to prevent inadvertent switching
- Extended Temperature Range: Operates flawlessly from Arctic -65°C to desert-hot +71°C
- Military-Grade Construction: Tested to withstand vibration, shock, and environmental extremes
Honeywell 4TL887-3D Toggle Switch - Rugged 4PDT Panel Mount Switch Survives Extreme Temperatures (-65°C to +71°C) and Harsh Environments
The Honeywell 4TL887-3D represents the pinnacle of rugged toggle switch engineering, combining military-grade construction with industrial reliability. As part of the legendary MICRO SWITCH TL Series, this 4PDT (4-pole double-throw) switch delivers uncompromising performance in mission-critical applications where failure is not an option. Engineered to MIL-DTL-3950 specifications, the switch features a robust nickel-plated locking lever actuator that prevents accidental actuation in high-vibration environments. The environmentally sealed design creates an impermeable barrier against dust, moisture, and hose-directed water (IP-rated sealing), while the 15/32-32 threaded bushing ensures secure panel mounting even under mechanical shock. With 15A current rating at 125VAC and silver alloy contacts, the 4TL887-3D handles substantial electrical loads while maintaining reliable circuit control. The industrial-grade screw terminals accommodate wire sizes up to 12 AWG, facilitating easy field wiring without specialized tools.Technical Specifications
| Parameter | 4TL887-3D Specification |
|---|---|
| Series | Honeywell TL |
| Circuit Configuration | 4PDT (4 Form C) |
| Switch Function | On-On |
| Current Rating | 15A AC |
| Voltage Rating | 125V AC |
| Actuator Type | Locking Lever |
| Actuator Length | 26.67mm |
| Termination Style | Screw Terminal |
| Panel Cutout | 12.40mm diameter |
| Bushing Thread | 15/32-32 UNF |
| Ingress Protection | Environment Sealed |
| Contact Material | Silver Alloy |
| Operating Temperature | -65°C to +71°C |
| Mounting Type | Panel Mount |
| Electrical Life | 25,000 cycles (minimum) |
| Mechanical Life | 50,000 cycles (minimum) |
| Approvals | UL, CSA, CE, UKCA |
| Weight | 45g (typical) |
Applications
1. Military & Aerospace Systems
- Aircraft Control Panels: Flight deck switching in fixed-wing and rotary aircraft where reliability is non-negotiable
- Armament Systems: Safe/arm circuits requiring positive lever locking to prevent accidental activation
- Ground Support Equipment: MIL-STD-810 qualified for use in aircraft refuelers, missile transporters
2. Heavy Industrial Equipment
- Construction Machinery: Excavator control panels exposed to vibration and weather extremes
- Mining Vehicles: Intrinsically safe circuits in methane environments
- Oil Rig Controls: Withstands salt spray corrosion in offshore platforms
3. Transportation & Infrastructure
- Railway Signaling: Maintains operation through temperature cycling (-40°C to +70°C)
- Traffic Management: UV-resistant materials for outdoor cabinet installations
- Marine Navigation: Prevents moisture ingress in shipboard switch panels
4. Power Generation
- Generator Transfer Switches: Handles inrush currents during power source transitions
- Substation Controls: Isolates circuits during maintenance operations
Design Advantages
Military-Proven Reliability
The switch's bonded seals between lever/bushing and cover/case exceed MIL-DTL-3950 leakage requirements. Independent testing verifies:- 500+ hours salt spray resistance per ASTM B117
- 50G shock survivability per MIL-STD-202
- 10-2000Hz vibration resistance without performance degradation
Ergonomic Locking Lever
The nickel-plated actuator features:- ±3° detent position tolerance for precise tactile feedback
- 2.28mm pull-out travel to disengage locking mechanism
- 34° total throw angle optimized for gloved operation
Electrical Performance
- Low 50mΩ contact resistance ensures minimal voltage drop
- 10ms break-before-make prevents hazardous short circuits
- 3kV dielectric strength between contacts and ground
Comparison to Industrial Switches
| Feature | 4TL887-3D | Commercial Toggle | Advantage |
|---|---|---|---|
| Temperature | -65°C to +71°C | -20°C to +60°C | 131°C wider range |
| Vibration | 50G operational | 10G operational | 5x more robust |
| Sealing | IP67 equivalent | IP40 | Submersible protection |
| Actuation Force | 3.5lb locking | 1.5lb non-locking | Prevents accidental toggle |
Installation Guidelines
- Panel Preparation:
- Drill 12.40±0.1mm hole using carbide bit
- Deburr edges to preserve sealing surface
- Mounting Procedure:
- Apply threadlocker to 15/32-32 bushing
- Torque locknut to 4.5Nm (40in-lb)
- Wiring Recommendations:
- Use 12-16AWG stranded wire
- Tighten screws to 0.56Nm (5in-lb)
- Apply silicone sealant at wire entry points
Ordering Information
- Base Part Number: 4TL8
- Packaging: Bulk (50 pieces/box)
- Lead Time: 6-8 weeks for MIL-SPEC versions
- RoHS Compliance: Fully compliant
- 4TL887-3 = Standard lever
- 4TL887-3E = Center-locked variant
FAQ
Q: Does it require special tools for lever locking? A: No - standard fingertip pressure (3.5lb) both engages and disengages the lock. Q: Can it switch DC loads? A: Yes - derate to 10A@28VDC resistive loads per MIL-PRF-8805. Q: Is there an illuminated version? A: No - for lighted toggles, consider Honeywell NT Series.Design Resources
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Frequently Asked Questions
Short answers for sourcing 4TL887-3D from Honeywell: what to confirm before you place the order.
What is 4TL887-3D?
Positive Locking Mechanism: 26.67mm lever requires deliberate force to prevent inadvertent switching Extended Temperature Range: Operates flawlessly from Arctic -65°C to desert-hot +71°C Military-Grade Construction: Tested to withstand vibration, shock, and environmental extremes
What type of component is 4TL887-3D?
4TL887-3D is a Electromechanical Switches from Honeywell.
What are the key specifications of 4TL887-3D?
Series: Honeywell TL; Circuit Configuration: 4PDT (4 Form C); Switch Function: On-On; Current Rating: 15A AC; Voltage Rating: 125V AC.
Is 4TL887-3D in stock at MOZ Electronics?
4TL887-3D is listed as in stock. Order online when a price is shown, or submit an RFQ for volume pricing and lead time.
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