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Spec Sheet
Product Specs
- Connection:
- Screw Terminals
- Contact Configuration:
- SPDT
- Contact Rating:
- 15A at 125Vac / 15A at 14Vdc
- Enclosure Material:
- Mineral Filled Phenolic
- Environmental Rating:
- NEMA 1
- Maximum Ac Current:
- 15A
- Notes:
- Bottom facing M4 x 0.7 (8-32) terminal screws with cup washers will accept 22 -12 AWG (2.5 sq. mm maximum)
- Operating Temperature:
- -13° to 176°F (-25° to 80°C)
- Department:
- Electrical
- Product Length:
- .69 IN
- Switch Classification:
- One Way Roller
- Product Height:
- 1.94 IN
- Product Weight:
- .0813 LB
- Product Width:
- 2.08 IN
B-LINE E47BMS31 – Frequently Asked Questions
1) What wire size can I land on the B-Line E47BMS31 limit switch terminals?
The E47BMS31 takes 22 to 12 AWG (2.5 sq mm maximum) on bottom facing M4 x 0.7 (8-32) terminal screws with cup washers. Screw terminals, so no crimp-on connector or pigtail is supplied, and the bottom-facing orientation means you need clearance under the switch body for the conductors to turn out.
2) Can the E47 precision limit switch be wired as either normally open or normally closed?
Yes. It is an SPDT switch, so you get one common plus a normally open and a normally closed contact off the same actuation, and you pick the one your control circuit needs. That also lets you use it to transfer a signal from one circuit to another instead of just making or breaking one.
3) What load can the B-Line E47BMS31 switch handle directly without a relay?
Contacts are rated 15A at 125Vac and 15A at 14Vdc. That covers most small motor starter coils, solenoid valves, contactor coils and 12V control circuits landed straight on the switch. Anything above 125Vac, or a DC load above 14V, needs an interposing relay rather than direct switching.
4) Is this limit switch OK to mount outdoors or in a washdown area?
No. The E47BMS31 carries a NEMA 1 environmental rating, which is indoor general purpose only, protecting against incidental contact and falling dirt. It gives no protection against rain, hose-down, dust ingress or coolant splash. For an outdoor door operator, a car wash, or a food plant washdown zone, specify a sealed limit switch with a NEMA 4 or 4X rating instead.
5) What is a "basic" limit switch and do I need to add an actuator?
Basic means the bare precision switch body with its own actuator, not a switch built into an operating head with a lever arm or plunger assembly. This one is supplied as a one way roller type, so the roller trips the contacts when the cam or moving part pushes it from the intended direction only. If your machine needs the switch tripped from both directions of travel, a one way roller is the wrong actuator and you want a standard roller lever style.
6) Will the E47 limit switch hold up in an unheated warehouse or a hot equipment room?
Operating range is -13 to 176 degrees F (-25 to 80 degrees C), so an unheated northern warehouse, a loading dock, or a boiler room within that band is fine. The body is mineral filled phenolic, which is a rigid thermoset rather than a soft plastic, so it tolerates the heat end without deforming.
7) How much room do I need to fit the B-Line E47BMS31 into an existing panel or machine guard?
The switch measures 2.08 x 1.94 x .69 inches and weighs .0813 lb. It is a small, light body, so mounting brackets do not need to carry any real load, but plan clearance below it for the bottom-facing terminal screws and the conductors coming off them.
8) What is the exact part number to order for the B-Line E47 basic limit switch?
Order it as E47BMS31. That is the manufacturer part number for the B-Line E47 basic precision limit switch with the one way roller actuator, SPDT contacts and screw terminals.
How fast can I get the B-LINE E47BMS31 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the B-LINE E47BMS31 come with a warranty?
Absolutely. The B-LINE E47BMS31 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the B-LINE E47BMS31?
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