Allen-Bradley

1747-L20B

Name: 1747-L20B
Brand: Allen-Bradley

Verified market

Market snapshot

Prices updated 9 Oct 2026 · next refresh 9 Nov

$579

Low

$909

High

Median $720 · 7 sellers · $141 below median at the lowest

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$ Compare your quote against 7 current asking prices.

Asking prices for the exact catalog number 1747-L20B currently range from $579 to $909 across 7 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

7 SELLERS · SORTED BY PRICE

Seller	Condition	Price	vs median	Listing
4D Controls	USED / REFURB	$579.00	-20%	View offer
www.SterlingServices.com	not stated	$603.44	-16%	View offer
DO Supply	not stated	$684.00	-5%	View listing
Radwell.com	not stated	$720.29	·	View offer
Shop.adegis.com	USED / REFURB	$737.46	+2%	View offer
Southland Electrical Supply	USED / REFURB	$848.26	+18%	View offer
Electrical.com	USED / REFURB	$908.74	+26%	View offer

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Condition

AS STATED BY SELLERS

Used / refurbished	4
Not stated	3

Most industrial listings do not state condition — treat unstated as unknown, not as new. Across 11 comparable parts in SLC 500 CPUs, used and refurbished units are listed at a median 71% of the new price. These are asking prices, not sold prices, and the spread around that median is wide. Ask the seller to state condition in writing before comparing quotes.

Variants and similar numbers

VERIFY BEFORE ORDERING

Catalog number	Relationship	Sellers	Median	vs this part
1747-L40C	one character apart	14	$263	-64%
1747-L20C	one character apart	7	$349	-52%
1747-L40B	one character apart	6	$709	-2%
1747-L30B	one character apart	5	$480	-33%
1747-L40A	one character apart	4	$774	+8%
1747-L30A	one character apart	3	$519	-28%

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 1747-L20B cost?

As of 9 Oct 2026, the Allen-Bradley 1747-L20B is listed from $579 to $909 across 7 sellers. The median asking price is $720. Prices are published seller asking prices and are refreshed monthly.

Who sells the 1747-L20B?

7 sellers currently list the 1747-L20B, including 4D Controls, www.SterlingServices.com, DO Supply. 7 of them are specialist industrial distributors. The lowest current asking price is $579 from 4D Controls.

Why do 1747-L20B prices vary so much?

The highest asking price for the 1747-L20B is 1.6× 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.

Related SLC 500 CPUs parts

10 SHOWN

Catalog number	Sellers	Low	Median	Spread
1747-UICSLC 500 CPUs	10	$56.05	$113	+$142
1747-BASLC 500 CPUs	1	$43.95	$43.95	+$0.00
1747-CP3SLC 500 CPUs	4	$19.95	$57.00	+$49.05
1747-AENTRSLC 500 CPUs	5	$1,129	$2,500	+$3,071
1747-L551SLC 500 CPUs	16	$780	$1,527	+$1,820
1747-L552SLC 500 CPUs	10	$755	$2,465	+$4,624
1747-L553SLC 500 CPUs	16	$868	$2,523	+$4,232
1747-SNSLC 500 CPUs	3	$18.99	$19.95	+$11.01
1747-L532SLC 500 CPUs	17	$99.99	$189	+$380
1747-L541SLC 500 CPUs	13	$90.00	$300	+$540