6SE7021-8TB51
Median $3,235 · 8 sellers · $3,814 price spread
Asking prices for the exact catalog number 6SE7021-8TB51 currently range from $2,186 to $6,000 across 8 sellers, observed 9 Aug 2026. Distributor product page: mroelectric.com. Prices are published seller asking prices; shipping, taxes and negotiated trade pricing are not included.
| Seller | Condition | Price | vs median | Listing |
|---|---|---|---|---|
| 4D Controls | USED / REFURB | $2,186.34 | -32% | View listing |
| Classic Automation | not stated | $2,290.00 | -29% | View listing |
| CJS Automation | not stated | $2,638.76 | -18% | View listing |
| WiAutomation US | not stated | $2,881.60 | -11% | View listing |
| Radwell.com | not stated | $3,587.57 | +11% | View listing |
| PLC Direct | not stated | $4,592.50 | +42% | View listing |
| Automation Warehouse | NEW | $4,775.38 | +48% | View listing |
| Williams Automation | not stated | $6,000.00 | +85% | View listing |
| New | 1 |
| Used / refurbished | 1 |
| Not stated | 6 |
How much does a 6SE7021-8TB51 cost?
As of 9 Aug 2026, the Siemens 6SE7021-8TB51 is listed from $2,186 to $6,000 across 8 sellers. The median asking price is $3,235. Prices are published seller asking prices and are refreshed monthly.
Who sells the 6SE7021-8TB51?
8 sellers currently list the 6SE7021-8TB51, including 4D Controls, Classic Automation, CJS Automation. 8 of them are specialist industrial distributors. The lowest current asking price is $2,186 from 4D Controls.
Why do 6SE7021-8TB51 prices vary so much?
The highest asking price for the 6SE7021-8TB51 is 2.7× 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.