Original Siemens 6SE70 Inverter/Converter 6SE7016-1EA51 6SE70161EA51 6SE7O16-1EA51

6SE7016-1EA51 | Siemens SIMOVERT Masterdrives VC AC Compact Converter — 380–480V AC / 2.2kW / 6.1A / 51-Revision Hardware

6SE7016-1EA51 and 6SE7016-1EA61 — Earlier and Later Revisions

The 6SE7016-1EA51 is the earlier-revision variant of the 6SE7016-1EA61 AC-AC compact converter. Both are SIMOVERT MASTERDRIVES VC vector control compact units with 380–480V AC input at 2.2kW / 6.1A. The revision suffix distinguishes their hardware generations:

The "51" revision represents an earlier SIMOVERT MASTERDRIVES production generation. Electrical performance — rated power, current, voltage range, and control capability — is consistent between the 51 and 61 revisions. Hardware differences are internal to each compact unit.

Key Specifications

AC-AC Self-Contained Operation

Like the 6SE7016-1EA61, the 6SE7016-1EA51 is an AC-AC converter — it connects directly to a 380–480V AC mains supply and includes its own internal rectifier and inverter stages. No external DC bus supply module is required.

This standalone AC-AC configuration is the 6SE7016-1EA series' primary advantage over the DC-AC 1TA series for single-drive applications:

Simpler system design: One drive, one mains connection, one motor cable. No shared DC bus to size, install, or commission.

Independent operation: Each 1EA-series compact unit operates independently — a fault in one drive does not affect other drives in the installation.

Application Scenarios

Like-for-like replacement in older machine: A production machine with original 51-revision SIMOVERT compact converters develops a drive fault. The 6SE7016-1EA51 provides a hardware-matched replacement — maintaining consistency with the existing installation's hardware generation.

Planned maintenance spare: A facility maintaining SIMOVERT MASTERDRIVES VC equipment from the earlier production era keeps 6SE7016-1EA51 units on the shelf for prompt fault recovery without waiting for sourcing lead times.

FAQ

Q1: Can 6SE7016-1EA51 (51-revision) be replaced by 6SE7016-1EA61 (61-revision)?

Electrically yes — both share the same 380–480V AC input, 2.2kW, 6.1A specification. In most installations, the 61-revision is a straightforward electrical substitute for the 51-revision. Verify option board compatibility before substituting if option boards (PROFIBUS, encoder, technology boards) are installed — confirm from SIMOVERT MASTERDRIVES documentation that the specific option board versions are compatible with the 61-revision hardware before transferring.

Q2: How does the AC-AC 6SE7016-1EA51 differ from the DC-AC 6SE7016-1TA51?

The 1EA51 includes its own internal rectifier — it connects to a 380–480V AC mains supply directly and operates as a standalone drive. The 1TA51 has no internal rectifier and requires a pre-existing 510–650V DC bus from a SIMOVERT supply module. The "EA" and "TA" in the part number identify the input voltage class: EA = AC mains input (380–480V AC), TA = DC bus input (510–650V DC).

Q3: What are the VT and CT current ratings for 6SE7016-1EA51?

Like the 61-revision equivalent, the 6SE7016-1EA51 provides two overload ratings: VT (Variable Torque) at the nominal 6.1A — supports 136% overload for 1 minute; CT (Constant Torque) at a slightly derated current — supports 150% overload for 1 minute. These ratings are set by the drive's P-parameter configuration (parameter P072 or equivalent) to match the application's torque profile.

Q4: What safety precautions apply when replacing 6SE7016-1EA51?

Isolate and lock out the 3-phase mains supply. The 1EA51 internal capacitors retain hazardous voltage after mains removal — wait the discharge time from the SIMOVERT MASTERDRIVES maintenance documentation and verify DC voltage at the capacitors is below 50V before handling. Handle the compact unit with normal industrial ESD precautions.