Allen-Bradley

509-COB

Name: 509-COB
Brand: Allen-Bradley

2 sellers — below our five-seller verification bar

Market snapshot

Prices updated 9 Oct 2026 · next refresh 9 Nov

$380

Low

$921

High

Median $650 · 2 sellers · $271 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-COB currently range from $380 to $921 across 2 sellers, observed 9 Oct 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
Essential Electric Supply	$379.55	-42%	View offer
Coast to Coast Breaker	$920.99	+42%	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	18	$199	-69%
509-EOD	one character apart	6	$3,161	+386%
5094-MB	one character apart	6	$131	-80%
509-DOD	one character apart	4	$1,113	+71%
509-DOB	one character apart	3	$1,414	+117%
509-BOB	one character apart	3	$278	-57%

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-COB cost?

As of 9 Oct 2026, the Allen-Bradley 509-COB is listed from $380 to $921 across 2 sellers. The median asking price is $650. Prices are published seller asking prices and are refreshed monthly.

Who sells the 509-COB?

2 sellers currently list the 509-COB, including Essential Electric Supply, Coast to Coast Breaker. 2 of them are specialist industrial distributors. The lowest current asking price is $380 from Essential Electric Supply.

Why do 509-COB prices vary so much?

The highest asking price for the 509-COB is 2.4× 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.