Allen-Bradley

509-BOB

Name: 509-BOB
Brand: Allen-Bradley

2 sellers — below our five-seller verification bar ACTIVE

Market snapshot

Prices updated 20 Sep 2026 · next refresh 21 Oct

$278

Low

$495

High

Median $387 · 2 sellers · $108 below median at the lowest

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$ Compare your quote against 2 current asking prices.

Asking prices for the exact catalog number 509-BOB currently range from $278 to $495 across 2 sellers, observed 20 Sep 2026. Distributor product page: santaclarasystems.com. Prices are published seller asking prices; shipping, taxes and negotiated trade pricing are not included.

Current listings

2 SELLERS · SORTED BY PRICE

Seller	Price	vs median	Listing
Relectric.com	$278.30	-28%	View offer
Essential Electric Supply	$494.76	+28%	View offer

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Variants and similar numbers

VERIFY BEFORE ORDERING

Catalog number	Relationship	Sellers	Median	vs this part
509-TOD	one character apart	9	$207	-46%
5094-MB	one character apart	6	$129	-67%
509-DOB	one character apart	5	$1,414	+266%
509-EOD	one character apart	5	$964	+149%
509-DOD	one character apart	2	$858	+122%

These are different products that read almost identically on a purchase order. Google groups them together; we do not. Confirm the exact suffix against the nameplate before ordering.

Frequently asked

How much does a 509-BOB cost?

As of 20 Sep 2026, the Allen-Bradley 509-BOB is listed from $278 to $495 across 2 sellers. The median asking price is $387. Prices are published seller asking prices and are refreshed monthly.

Who sells the 509-BOB?

2 sellers currently list the 509-BOB, including Relectric.com, Essential Electric Supply. 2 of them are specialist industrial distributors. The lowest current asking price is $278 from Relectric.com.

Why do 509-BOB prices vary so much?

The highest asking price for the 509-BOB is 1.8× the lowest. Industrial parts trade in a market where new surplus, refurbished stock and list-price sellers coexist without a shared price reference, so identical catalog numbers are listed at very different prices.