PartHistory
Siemens / PLCs and I/O (SIMATIC)

6ES5921-1AA21

PLCs and I/O (SIMATIC) family illustration
Recorded listings
48
Recorded quantity sold
2
Median recorded price
$624.1731 US-dollar records
Recorded price range
$249.99to $1552.92 USD
First listing start: 22 Nov 2019Last listing start: 04 Jun 2026

Recorded price history

USD
Recorded US-dollar price historyLinear price scale. Horizontal axis: listing start date. Vertical axis: recorded price in US dollars. Filled dots have recorded sales; open dots have no recorded sales. The oxide step line shows calendar-month medians, with gaps for missing months.0.00500.001000.001500.002000.00Nov 2019Jun 2021Feb 2023Oct 2024Jun 20262019-11-22: US$1552.92; no sale recorded2020-08-26: US$415.00; no sale recorded2021-03-30: US$946.26; no sale recorded2022-01-29: US$446.51; no sale recorded2022-03-01: US$442.03; no sale recorded2022-04-02: US$419.39; no sale recorded2022-05-05: US$436.83; no sale recorded2023-03-16: US$456.91; no sale recorded2024-01-07: US$434.83; no sale recorded2024-02-10: US$411.22; no sale recorded2024-03-08: US$456.91; sold recorded2024-04-03: US$431.31; no sale recorded2024-06-07: US$435.91; no sale recorded2024-07-07: US$432.95; no sale recorded2025-09-06: US$281.65; no sale recorded2026-01-20: US$624.17; no sale recorded2026-02-12: US$624.17; no sale recorded2026-02-19: US$624.17; no sale recorded2026-02-20: US$624.17; no sale recorded2026-02-28: US$624.17; no sale recorded2026-03-08: US$624.17; no sale recorded2026-03-18: US$624.17; no sale recorded2026-04-05: US$624.17; no sale recorded2026-04-07: US$624.17; no sale recorded2026-04-09: US$624.17; no sale recorded2026-04-13: US$624.17; no sale recorded2026-04-14: US$624.17; no sale recorded2026-04-28: US$624.17; no sale recorded2026-05-03: US$624.17; no sale recorded2026-05-06: US$624.17; no sale recorded2026-06-04: US$249.99; no sale recordedRecorded US-dollar price historyLinear price scale. Horizontal axis: listing start date. Vertical axis: recorded price in US dollars. Filled dots have recorded sales; open dots have no recorded sales. The oxide step line shows calendar-month medians, with gaps for missing months.0.00500.001000.001500.002000.00Nov 2019Feb 2023Jun 20262019-11-22: US$1552.92; no sale recorded2020-08-26: US$415.00; no sale recorded2021-03-30: US$946.26; no sale recorded2022-01-29: US$446.51; no sale recorded2022-03-01: US$442.03; no sale recorded2022-04-02: US$419.39; no sale recorded2022-05-05: US$436.83; no sale recorded2023-03-16: US$456.91; no sale recorded2024-01-07: US$434.83; no sale recorded2024-02-10: US$411.22; no sale recorded2024-03-08: US$456.91; sold recorded2024-04-03: US$431.31; no sale recorded2024-06-07: US$435.91; no sale recorded2024-07-07: US$432.95; no sale recorded2025-09-06: US$281.65; no sale recorded2026-01-20: US$624.17; no sale recorded2026-02-12: US$624.17; no sale recorded2026-02-19: US$624.17; no sale recorded2026-02-20: US$624.17; no sale recorded2026-02-28: US$624.17; no sale recorded2026-03-08: US$624.17; no sale recorded2026-03-18: US$624.17; no sale recorded2026-04-05: US$624.17; no sale recorded2026-04-07: US$624.17; no sale recorded2026-04-09: US$624.17; no sale recorded2026-04-13: US$624.17; no sale recorded2026-04-14: US$624.17; no sale recorded2026-04-28: US$624.17; no sale recorded2026-05-03: US$624.17; no sale recorded2026-05-06: US$624.17; no sale recorded2026-06-04: US$249.99; no sale recorded
Sold recordedNo sale recordedMonthly median

Linear price scale. Dates are listing starts.

Median recorded price, all years$624.17

31 plotted records from 31 US-dollar records in this range. Monthly medians use all records in each calendar month.

Archived listings

48 recorded listings
Listing startArchived listingConditionRecorded priceQty soldArchive statusCountry
04 Jun 2026Siemens Simatic Circuit Board w/ Memory Card 6ES5921-1AA21 6ES5370-0AA41eBay 336620336850Used$249.990Recorded activeUS
06 May 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 236801024264Used$624.170Recorded activeUS
03 May 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 318242188253Used$624.170Recorded activeUS
28 Apr 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 318214033377Used$624.170Recorded activeUS
14 Apr 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 397837467614Used$624.170Recorded activeUS
13 Apr 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 236753376293Used$624.170Recorded activeUS
09 Apr 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 397820256878Used$624.170Recorded activeUS
07 Apr 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 318116046393Used$624.170Recorded activeUS
05 Apr 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 236737642655Used$624.170Recorded activeUS
18 Mar 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 318021883355Used$624.170Recorded activeUS
08 Mar 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 236674917776Used$624.170Recorded activeUS
01 Mar 2026Siemens Simatic CPU 6ES5921-1AA21 / 6ES5 921-1AA21 E:3 / Original PackagingeBay 147178625699Gebraucht387.32 [DE]0Recorded activeDE
28 Feb 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 317933819115Used$624.170Recorded activeUS
20 Feb 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 236645294354Used$624.170Recorded activeUS
19 Feb 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 317897769847Used$624.170Recorded activeUS
12 Feb 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 397598758014Used$624.170Recorded activeUS
29 Jan 2026Siemens Simatic CPU 6ES5921-1AA21 / 6ES5 921-1AA21 E:3 / Original PackagingeBay 127652458133Gebraucht391.97 [DE]0Recorded activeDE
20 Jan 2026SIEMENS 6ES5921-1AA21 / 6ES59211AA21 (USED)eBay 236591282999Used$624.170Recorded activeUS
05 Nov 2025Siemens Simatic CPU 6ES5921-1AA21 / 6ES5 921-1AA21 E:3 / Original PackagingeBay 406354664509Gebraucht376.49 [DE]0Recorded activeDE
06 Sep 2025Used Siemens 6ES5921-1AA21 [24 Months Warranty]eBay 177392126330Used$281.650Recorded activeCZ
01 Jun 2025USED SIEMENS 6ES5921-1AA21 [24 MONTHS WARRANTY]eBay 187279494453Gebraucht383.06 [DE]0Recorded activeCZ
07 Jul 2024Siemens Simatic 6es5921-1aa21 ( Hx )eBay 256565173205Used$432.950No sale recordedDE
07 Jun 2024Siemens Simatic 6es5921-1aa21 ( Hx )eBay 364934832163Used$435.910No sale recordedDE
19 Apr 2024USED SIEMENS 6ES5921-1AA21 [24 MONTHS WARRANTY]eBay 186400343769Gebraucht360.21 [Germany]0No sale recordedCZ
18 Apr 2024USED SIEMENS 6ES5921-1AA21 [24 MONTHS WARRANTY]eBay 176338957714Gebraucht359.72 [Germany]0No sale recordedCZ
How to read these records

Dollar amounts are recorded US-dollar prices. Bracketed labels identify other marketplaces, whose currency was not recorded. Recorded quantities sold indicate marketplace activity. Recorded active is the status retained in the archive.

Browse neighboring part numbers by prefix

Neighboring part numbers

6ES59110AA526ES5920-3UA126ES5921-1AA116ES5921-1AA21_6ES5370-0AA416ES5921-1B116ES5921-1BA11

Related part numbers

6ES5924-3SA116ES5923-3UA116ES5431-4UA126ES5095-8MA016ES5700-8MA116GK1901-1GA003RU1926-3AA016EP1961-2BA006ES7550-1AA01-0AB06ES7321-1BL00-0AA06ES7522-1BL01-0AB06ES7511-1AL03-0AB06ES7151-3AA23-0AB06ES7441-1AA03-0AE06ES7321-1BH02-0AA0

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