PartHistory
Siemens / Other Siemens parts

521-8MA21

Other Siemens parts family illustration
Recorded listings
127
Recorded quantity sold
14
Median recorded price
$110.0082 US-dollar records
Recorded price range
$1.00to $373.00 USD
First listing start: 09 Nov 2017Last listing start: 01 May 2026

Recorded price history

USD
Recorded US-dollar price historyLogarithmic price scale (price + 1). 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.0110100Nov 2017Dec 2019Jan 2022Mar 2024May 20262017-11-09: US$34.58; no sale recorded2018-02-13: US$162.33; no sale recorded2018-03-14: US$119.39; sold recorded2018-08-16: US$123.50; no sale recorded2018-10-20: US$123.50; no sale recorded2019-02-20: US$117.37; no sale recorded2019-12-18: US$72.00; no sale recorded2020-05-22: US$63.00; no sale recorded2020-06-19: US$19.07; no sale recorded2020-08-22: US$70.00; no sale recorded2021-01-13: US$68.00; no sale recorded2021-01-26: US$1.00; no sale recorded2021-02-02: US$1.00; no sale recorded2021-02-12: US$1.00; no sale recorded2021-02-18: US$110.00; no sale recorded2021-02-24: US$1.00; no sale recorded2021-03-02: US$1.00; no sale recorded2021-03-17: US$1.00; no sale recorded2021-04-08: US$1.00; no sale recorded2021-04-29: US$1.00; no sale recorded2021-05-06: US$1.00; no sale recorded2021-05-17: US$1.00; no sale recorded2021-05-18: US$110.00; no sale recorded2021-05-31: US$1.00; no sale recorded2021-06-17: US$1.00; no sale recorded2021-06-17: US$225.00; no sale recorded2021-06-22: US$1.00; no sale recorded2022-01-19: US$32.40; no sale recorded2022-01-19: US$49.99; no sale recorded2022-01-26: US$110.00; no sale recorded2022-01-26: US$110.00; no sale recorded2022-02-04: US$110.00; no sale recorded2022-04-02: US$20.00; no sale recorded2022-04-02: US$20.00; no sale recorded2022-04-02: US$20.00; no sale recorded2022-07-22: US$373.00; no sale recorded2022-08-04: US$85.03; no sale recorded2022-08-29: US$20.00; no sale recorded2022-12-21: US$322.00; no sale recorded2023-01-05: US$125.00; no sale recorded2023-03-09: US$85.03; no sale recorded2023-05-29: US$117.37; no sale recorded2023-06-09: US$30.00; no sale recorded2023-06-27: US$128.59; no sale recorded2023-07-20: US$110.00; no sale recorded2023-09-12: US$110.00; no sale recorded2023-09-26: US$85.03; no sale recorded2024-01-02: US$71.83; no sale recorded2024-01-08: US$110.00; no sale recorded2024-01-24: US$76.53; no sale recorded2024-02-07: US$110.00; no sale recorded2024-02-21: US$141.45; no sale recorded2024-02-25: US$85.03; sold recorded2024-02-29: US$142.88; sold recorded2024-03-07: US$110.00; no sale recorded2024-04-06: US$110.00; no sale recorded2024-05-05: US$110.00; no sale recorded2024-05-17: US$117.37; no sale recorded2024-05-26: US$117.37; sold recorded2024-07-02: US$110.00; no sale recorded2024-07-02: US$11.00; no sale recorded2024-08-30: US$110.00; no sale recorded2024-08-30: US$159.00; no sale recorded2024-10-28: US$110.00; no sale recorded2024-12-26: US$110.00; sold recorded2025-01-16: US$75.99; no sale recorded2025-01-25: US$110.00; sold recorded2025-02-19: US$167.67; no sale recorded2025-02-23: US$110.00; sold recorded2025-04-21: US$110.00; sold recorded2025-05-20: US$110.00; no sale recorded2025-06-19: US$110.00; no sale recorded2025-07-18: US$110.00; no sale recorded2025-07-26: US$119.99; no sale recorded2025-08-17: US$110.00; no sale recorded2025-09-15: US$110.00; no sale recorded2025-10-08: US$189.00; no sale recorded2025-10-21: US$2.69; no sale recorded2025-11-13: US$110.00; no sale recorded2026-01-11: US$110.00; no sale recorded2026-04-21: US$240.00; no sale recorded2026-05-01: US$77.23; no sale recordedRecorded US-dollar price historyLogarithmic price scale (price + 1). 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.0110100Nov 2017Jan 2022May 20262017-11-09: US$34.58; no sale recorded2018-02-13: US$162.33; no sale recorded2018-03-14: US$119.39; sold recorded2018-08-16: US$123.50; no sale recorded2018-10-20: US$123.50; no sale recorded2019-02-20: US$117.37; no sale recorded2019-12-18: US$72.00; no sale recorded2020-05-22: US$63.00; no sale recorded2020-06-19: US$19.07; no sale recorded2020-08-22: US$70.00; no sale recorded2021-01-13: US$68.00; no sale recorded2021-01-26: US$1.00; no sale recorded2021-02-02: US$1.00; no sale recorded2021-02-12: US$1.00; no sale recorded2021-02-18: US$110.00; no sale recorded2021-02-24: US$1.00; no sale recorded2021-03-02: US$1.00; no sale recorded2021-03-17: US$1.00; no sale recorded2021-04-08: US$1.00; no sale recorded2021-04-29: US$1.00; no sale recorded2021-05-06: US$1.00; no sale recorded2021-05-17: US$1.00; no sale recorded2021-05-18: US$110.00; no sale recorded2021-05-31: US$1.00; no sale recorded2021-06-17: US$1.00; no sale recorded2021-06-17: US$225.00; no sale recorded2021-06-22: US$1.00; no sale recorded2022-01-19: US$32.40; no sale recorded2022-01-19: US$49.99; no sale recorded2022-01-26: US$110.00; no sale recorded2022-01-26: US$110.00; no sale recorded2022-02-04: US$110.00; no sale recorded2022-04-02: US$20.00; no sale recorded2022-04-02: US$20.00; no sale recorded2022-04-02: US$20.00; no sale recorded2022-07-22: US$373.00; no sale recorded2022-08-04: US$85.03; no sale recorded2022-08-29: US$20.00; no sale recorded2022-12-21: US$322.00; no sale recorded2023-01-05: US$125.00; no sale recorded2023-03-09: US$85.03; no sale recorded2023-05-29: US$117.37; no sale recorded2023-06-09: US$30.00; no sale recorded2023-06-27: US$128.59; no sale recorded2023-07-20: US$110.00; no sale recorded2023-09-12: US$110.00; no sale recorded2023-09-26: US$85.03; no sale recorded2024-01-02: US$71.83; no sale recorded2024-01-08: US$110.00; no sale recorded2024-01-24: US$76.53; no sale recorded2024-02-07: US$110.00; no sale recorded2024-02-21: US$141.45; no sale recorded2024-02-25: US$85.03; sold recorded2024-02-29: US$142.88; sold recorded2024-03-07: US$110.00; no sale recorded2024-04-06: US$110.00; no sale recorded2024-05-05: US$110.00; no sale recorded2024-05-17: US$117.37; no sale recorded2024-05-26: US$117.37; sold recorded2024-07-02: US$110.00; no sale recorded2024-07-02: US$11.00; no sale recorded2024-08-30: US$110.00; no sale recorded2024-08-30: US$159.00; no sale recorded2024-10-28: US$110.00; no sale recorded2024-12-26: US$110.00; sold recorded2025-01-16: US$75.99; no sale recorded2025-01-25: US$110.00; sold recorded2025-02-19: US$167.67; no sale recorded2025-02-23: US$110.00; sold recorded2025-04-21: US$110.00; sold recorded2025-05-20: US$110.00; no sale recorded2025-06-19: US$110.00; no sale recorded2025-07-18: US$110.00; no sale recorded2025-07-26: US$119.99; no sale recorded2025-08-17: US$110.00; no sale recorded2025-09-15: US$110.00; no sale recorded2025-10-08: US$189.00; no sale recorded2025-10-21: US$2.69; no sale recorded2025-11-13: US$110.00; no sale recorded2026-01-11: US$110.00; no sale recorded2026-04-21: US$240.00; no sale recorded2026-05-01: US$77.23; no sale recorded
Sold recordedNo sale recordedMonthly median

Logarithmic price scale (price + 1). Dates are listing starts.

Median recorded price, all years$110.00

82 plotted records from 82 US-dollar records in this range. Monthly medians use all records in each calendar month.

Archived listings

127 recorded listings
Listing startArchived listingConditionRecorded priceQty soldArchive statusCountry
01 May 2026SIEMENS SIMATIC S5 6ES5 521-8MA21eBay 147288147708New - Open box$77.230Recorded activeDE
21 Apr 2026SIEMENS 6ES5 521-8MA21 INTERFACE MODULE CP 521eBay 206223527677Used$240.000Recorded activeJO
15 Apr 2026Siemens Simatic S5 6ES5 521-8MA21 E:04 + 6ES5 375-1LA21 E:1 -used-eBay 168310691874Gebraucht104.98 [DE]0Recorded activeDE
06 Apr 2026Siemens Simatic S5 6ES5 521-8MA21 E-Stand: 03 Serial Interface CP 521 SI -used-eBay 168290167603Gebraucht23.04 [DE]0Recorded activeDE
29 Mar 2026Siemens Simatic S5 6ES5 521-8MA21 E-Stand: 04 CP 521 SI Serial Interface -used-eBay 168271374782Gebraucht23.02 [DE]0Recorded activeDE
29 Mar 2026Siemens Simatic S5 6ES5 521-8MA21 E-Stand: 02 Serial Interface CP 521 SI -used-eBay 168271368034Gebraucht23.02 [DE]0Recorded activeDE
17 Feb 2026Siemens Simatic S5 6ES5 521-8MA21 -used-eBay 168166878048Gebraucht23.70 [DE]0Recorded activeDE
08 Feb 2026Siemens Simatic S5 6ES5 521-8MA21 E:04 + 6ES5 375-1LA21 E:1 -used-eBay 168145189799Gebraucht105.15 [DE]0Recorded activeDE
03 Feb 2026Siemens Simatic S5 6ES5 521-8MA21 E-Stand: 03 Ser. Interface Module -Unused/Original Packaging-eBay 168132597181Neu: Sonstige (siehe Artikelbeschreibung)222.85 [DE]0Recorded activeDE
11 Jan 2026SIEMENS 6ES5 521-8MA21 6ES5 375-1LA21 serial interface *USED & TESTED*eBay 267541505242Used$110.000Recorded activeCA
13 Nov 2025SIEMENS 6ES5 521-8MA21 6ES5 375-1LA21 serial interface *USED & TESTED*eBay 257206618198Used$110.000Recorded activeCA
21 Oct 2025Siemens SIMATIC S5 6ES5 521-8MA21eBay 197790853842Used$2.690Recorded activePL
08 Oct 20256ES5 521-8MA21 | Siemens | Simatic S5, Communication Processor, UsedeBay 267430656370Used$189.000Recorded activeUS
15 Sep 2025SIEMENS 6ES5 521-8MA21 6ES5 375-1LA21 serial interface *USED & TESTED*eBay 267404445255Used$110.000Recorded activeCA
17 Aug 2025SIEMENS 6ES5 521-8MA21 6ES5 375-1LA21 serial interface *USED & TESTED*eBay 257069273633Used$110.000Recorded activeCA
26 Jul 2025Siemens 6ES5 521-8MA21 Interface Module Simatic S5 1NET812 0030eBay 406079216910Used$119.990Recorded activeIN
18 Jul 2025SIEMENS 6ES5 521-8MA21 6ES5 375-1LA21 serial interface *USED & TESTED*eBay 286715745567Used$110.000Recorded activeCA
19 Jun 2025SIEMENS 6ES5 521-8MA21 6ES5 375-1LA21 serial interface *USED & TESTED*eBay 256982211447Used$110.000Recorded activeCA
20 May 2025SIEMENS 6ES5 521-8MA21 6ES5 375-1LA21 serial interface *USED & TESTED*eBay 256939919350Used$110.000Recorded activeUS
21 Apr 2025SIEMENS 6ES5 521-8MA21 6ES5 375-1LA21 serial interface *USED & TESTED*eBay 286507812629Used$110.001Sold recordedUS
23 Feb 2025SIEMENS 6ES5 521-8MA21 6ES5 375-1LA21 serial interface *USED & TESTED*eBay 286356130720Used$110.001Sold recordedUS
19 Feb 2025Siemens Simatic S5 1P 6ES5 521-8MA21 6ES55218MA21 Serial InterfaceeBay 276883146710Used$167.670Recorded activePH
03 Feb 2025Siemens Simatic S5 6ES5 521-8MA21 E-Stand: 03 Serial Interface CP 521 SI -used-eBay 405518066907Gebraucht20.72 [DE]0Recorded activeDE
27 Jan 2025Siemens Simatic S5 6ES5 521-8MA21 -used-eBay 167278181978Gebraucht20.99 [DE]0Recorded activeDE
26 Jan 2025Siemens Simatic S5 6ES5 521-8MA21 E-Stand: 03 Ser. Interface Module -Unused/Original Packaging-eBay 405503256806Neu: Sonstige (siehe Artikelbeschreibung)198.39 [DE]0Recorded activeDE
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

521-8MA11521-8MA11-Z521-8MA11Z521-8MA22521-8MA226ES5521-8MA22521-8MB11

Related part numbers

521-8MA22431-8MD116ES5441-8MA116ES5420-8MA116ES5431-8MA116ES5421-8MA126ES5095-8MA016ES5700-8MA116ES5464-8MA11011-1MH1152PM8B2J482-8MA13095-8MC01944-7UA212025-0FA01

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