Price of PartsINDUSTRIAL PRICE INDEX
Siemens

6SE7021-8TB51

Verified market

Market snapshot

Prices updated 9 Oct 2026 · next refresh 9 Nov
$1,606
Low
$3,237
High
CirEle — $1,606Sigma Surplus — $1,9904D Controls — $2,164Industrial Automation Co. — $2,197Classic Automation — $2,290JC-Electronics US — $3,237CirEleCirEle$1,606Sigma SurplusSigma Surplus$1,9904D Controls4D Controls$2,164 · MEDIANIndustrial Automation Co.Industrial Aut…$2,197Classic AutomationClassic Automa…$2,290JC-Electronics USJC-Electronics…$3,237

Median $2,180 · 6 sellers · $574 below median at the lowest

$ Compare your quote against 6 current asking prices.

Asking prices for the exact catalog number 6SE7021-8TB51 currently range from $1,606 to $3,237 across 6 sellers, observed 9 Oct 2026. Distributor product page: mroelectric.com. Prices are published seller asking prices; shipping, taxes and negotiated trade pricing are not included.

Current listings

6 SELLERS · SORTED BY PRICE
SellerConditionPricevs medianListing
CirElenot stated $1,606.04-26% View offer
Sigma SurplusUSED / REFURB $1,989.99-9% View offer
4D ControlsUSED / REFURB $2,163.89-1% View offer
Industrial Automation Co.not stated $2,197.00+1% View offer
Classic Automationnot stated $2,290.00+5% View listing
JC-Electronics USnot stated $3,236.69+48% View offer

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Condition

AS STATED BY SELLERS
Used / refurbished2
Not stated4

Most industrial listings do not state condition — treat unstated as unknown, not as new. Across 864 comparable parts across the index, used and refurbished units are listed at a median 85% 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 numberRelationshipSellersMedianvs this part
6SE7021-8TB61one character apart7$3,883+78%
6SE7021-8TP50one character apart7$1,832-16%
6SE7021-0TA51one character apart6$2,959+36%
6SE7021-3TB61one character apart6$3,109+43%
6SE7021-8EB61one character apart5$3,175+46%
6SE7021-3TB51one character apart3$4,927+126%
6SE7021-3TB21one character apart2$3,824+75%
6SE7021-8TB31one character apart2$3,062+40%

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 6SE7021-8TB51 cost?

As of 9 Oct 2026, the Siemens 6SE7021-8TB51 is listed from $1,606 to $3,237 across 6 sellers. The median asking price is $2,180. Prices are published seller asking prices and are refreshed monthly.

Who sells the 6SE7021-8TB51?

6 sellers currently list the 6SE7021-8TB51, including CirEle, Sigma Surplus, 4D Controls. 6 of them are specialist industrial distributors. The lowest current asking price is $1,606 from CirEle.

Why do 6SE7021-8TB51 prices vary so much?

The highest asking price for the 6SE7021-8TB51 is 2.0× 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.