6SE7021-3TB21
Market snapshot
Prices updated 10 Aug 2026 · next refresh 10 SepMedian $4,493 · 3 sellers · $929 below median at the lowest
Asking prices for the exact catalog number 6SE7021-3TB21 currently range from $3,564 to $5,862 across 3 sellers, observed 10 Aug 2026. Prices are published seller asking prices; shipping, taxes and negotiated trade pricing are not included.
Current listings
3 SELLERS · SORTED BY PRICE| Seller | Price | vs median | Listing |
|---|---|---|---|
| Marvo Automation USA | $3,564.18 | -21% | View offer |
| PLC Direct | $4,493.36 | · | View offer |
| Radwell.com | $5,862.45 | +30% | View offer |
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Variants and similar numbers
VERIFY BEFORE ORDERING| Catalog number | Relationship | Sellers | Median | vs this part |
|---|---|---|---|---|
| 6SE7021-8TB51 | one character apart | 8 | $3,235 | -28% |
| 6SE7021-8TB61 | one character apart | 8 | $3,566 | -21% |
| 6SE7021-3TB51 | one character apart | 4 | $4,469 | -1% |
| 6SE7021-8TB31 | one character apart | 3 | $3,324 | -26% |
| 6SE7021-0TA21 | one character apart | 3 | $2,513 | -44% |
| 6SE7021-8TB21 | one character apart | 2 | $3,387 | -25% |
Frequently asked
How much does a 6SE7021-3TB21 cost?
As of 10 Aug 2026, the Siemens 6SE7021-3TB21 is listed from $3,564 to $5,862 across 3 sellers. The median asking price is $4,493. Prices are published seller asking prices and are refreshed monthly.
Who sells the 6SE7021-3TB21?
3 sellers currently list the 6SE7021-3TB21, including Marvo Automation USA, PLC Direct, Radwell.com. 3 of them are specialist industrial distributors. The lowest current asking price is $3,564 from Marvo Automation USA.
Why do 6SE7021-3TB21 prices vary so much?
The highest asking price for the 6SE7021-3TB21 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.