Weidmüller 8556070000 General Purpose Relay SPDT 6A 12V - Equivalent & Substitute Parts

Part Overview

The Weidmüller 8556070000 is a general purpose relay with SPDT (Single Pole Double Throw) contact configuration, rated for 6A at 12VDC coil voltage. This relay is designed for DIN rail mounting and features a lighted indicator with socket inclusion. The part is currently listed as obsolete, making identification of equivalent substitute parts essential for system maintenance, repair, and component sourcing. The substitute part 1122750000 provides functional equivalence with enhanced specifications and active product status.

Substiute Parts

8556070000

WeidmüllerIn Stock: 10198556070000 Datasheet

Current PartRFQ

1122750000

WeidmüllerIn Stock: 11571122750000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete Weidmüller 8556070000 with part number 1122750000 is based on the following critical electrical and mechanical parameters:

Core Compatibility Parameters:

• Contact Form: Both parts feature SPDT (1 Form C) configuration
• Coil Voltage: Both operate at 12VDC
• Contact Rating: Both rated for 6A continuous current
• Mounting Type: Both use DIN rail mounting
• Termination Style: Both use screw terminal connections
• Coil Type: Both are non-latching relays
• Features: Both include lighted indicator and socket

Enhanced Specifications in Substitute: The substitute part 1122750000 maintains all core electrical parameters while providing extended switching voltage capability (250VAC and 250VDC versus 250VAC only), improved operating temperature range (-40°C to 60°C versus -25°C to 50°C), and active product status with current manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

The Weidmüller 1122750000 is the direct substitute for the obsolete 8556070000. Selection of this substitute is supported by:

Product Status: The substitute part maintains active manufacturing status, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Regulatory Compliance: Both parts maintain identical RoHS and REACH compliance status, with matching ECCN and HTSUS classifications, ensuring no regulatory barriers to substitution.

Electrical Equivalence: Core electrical parameters—coil voltage, contact rating, contact form, and switching voltage—are maintained. The substitute provides extended DC switching capability (250VDC) in addition to the original AC specification.

Environmental Performance: The substitute part extends the operating temperature range to -40°C to 60°C, providing improved performance in wider environmental conditions.

Physical Compatibility: DIN rail mounting and screw terminal connections are identical, enabling direct mechanical replacement without circuit board or installation modifications.

Frequently Asked Questions (FAQ)

Q: Can the Weidmüller 1122750000 directly replace the 8556070000 in existing installations?

A: Yes. Both relays share identical contact form (SPDT), coil voltage (12VDC), current rating (6A), mounting type (DIN rail), and termination style (screw terminal). Physical and electrical compatibility is confirmed.

Q: What are the key differences between these two parts?

A: The substitute part 1122750000 offers extended switching voltage capability (250VDC in addition to 250VAC), wider operating temperature range (-40°C to 60°C versus -25°C to 50°C), and active product status. Contact material differs (Silver Nickel versus Silver Tin Oxide), and coil current specification is provided (18 mA).

Q: Why is the original part listed as obsolete?

A: The 8556070000 from the MRS series has been discontinued by Weidmüller. The TERMSERIES substitute 1122750000 represents the current production equivalent with enhanced specifications.

Q: Are there any packaging differences between these parts?

A: The original part is packaged as individual units with socket inclusion. The substitute is supplied in bulk packaging. Both include socket and lighted indicator features.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both parts are RoHS Compliant and REACH Unaffected, with identical ECCN (EAR99) and HTSUS (8536.41.0020) classifications.

Q: What is the impact of the different contact materials?

A: The original uses Silver Tin Oxide (AgSnO) contacts, while the substitute uses Silver Nickel (AgNi). Both materials are suitable for general purpose relay applications at the specified 6A rating and 250V switching voltage.

Q: Is the release time difference (7 ms versus 8 ms) significant?

A: The 1 ms difference in release time is within typical relay performance variation and does not affect functional compatibility for general purpose switching applications.