SWT861790 Equivalent & Substitute Parts

Part Overview

The SWT861790 is a Solid State Relay (SSR) manufactured by Celduc Inc., configured as a SPST-NO (1 Form A) module with a rated load current of 28 A and load voltage range of 24 V to 520 V. The device features AC output with zero-cross switching capability and accepts input voltage from 90 V to 240 VAC. This part is classified as obsolete, necessitating identification of active equivalent or substitute components to maintain system functionality and ensure continued availability for new designs and field replacements.

Substiute Parts

SWT861790

Celduc Inc.In Stock: 1031SWT861790 Datasheet

Current PartRFQ

SGT8698503

Celduc Inc.In Stock: 792SGT8698503 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete SWT861790 is based on the following critical parameters that define functional equivalence:

Load Voltage Range Compatibility: Both the main part and substitute maintain the identical load voltage range of 24 V to 520 V, ensuring compatibility with existing power distribution systems.

Output Type Consistency: Both components feature AC output with zero-cross switching, preserving the electrical switching characteristics required for AC load control.

Mounting Configuration: Both parts are configured for chassis mount installation, maintaining mechanical compatibility with existing enclosure designs.

Package Type: Both components are supplied as modules, ensuring form factor compatibility.

Compliance Standards: Both parts are RoHS compliant and carry MSL rating of 1 (Unlimited), meeting environmental and reliability requirements.

Manufacturer Continuity: Both parts are manufactured by Celduc Inc., ensuring design philosophy and quality standards alignment.

The substitute part SGT8698503 represents an active product offering from the same manufacturer with enhanced electrical capabilities, providing a path forward from the obsolete SWT861790.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The SWT861790 is classified as obsolete, indicating discontinued manufacturing and limited availability. The SGT8698503 is an active product with confirmed inventory availability (734 pieces in stock), ensuring supply chain continuity for new procurements and field service applications.

Compliance and Certification: Both components maintain RoHS compliance and identical MSL ratings, satisfying environmental and reliability standards. The SGT8698503 carries ECCN classification EAR99 and HTSUS code 8536.49.0080, providing regulatory documentation for international trade and export compliance.

Electrical Capability Enhancement: The SGT8698503 provides increased load current capacity (125 A versus 28 A) and expanded input voltage range (24 V to 255 VAC/DC versus 90 V to 240 VAC), offering greater operational flexibility within the identical load voltage envelope.

Circuit Configuration Difference: The substitute part features a 3PST-NO (3 Form A) configuration compared to the single-pole SPST-NO configuration of the main part. This represents an architectural upgrade providing three independent switching channels rather than one, suitable for multi-phase or multi-load control applications.

Frequently Asked Questions (FAQ)

Q: Can SGT8698503 directly replace SWT861790 in existing installations?

A: Direct replacement requires evaluation of circuit requirements. Both parts maintain identical load voltage range (24 V to 520 V) and AC zero-cross output type. However, the SGT8698503 features a 3PST-NO configuration (three switching channels) versus the SWT861790's SPST-NO configuration (single channel). Physical mounting compatibility is confirmed for both chassis mount modules. Electrical integration depends on whether the application requires single-pole or multi-pole switching functionality.

Q: What are the input voltage compatibility differences?

A: The SWT861790 accepts input voltage from 90 V to 240 VAC. The SGT8698503 accepts input voltage from 24 V to 255 VAC/DC, providing a broader input range with added DC capability. Applications operating within the 90 V to 240 VAC window are compatible with both parts.

Q: Are there on-state resistance specifications provided for the main part?

A: On-state resistance specification is provided only for the SGT8698503 (2 mOhms maximum). This parameter is not included in the SWT861790 documentation provided.

Q: How do the load current ratings affect substitution decisions?

A: The SWT861790 is rated for 28 A load current, while the SGT8698503 is rated for 125 A. The substitute part provides significantly higher current capacity. Applications requiring exactly 28 A operation should verify that the higher-rated substitute does not introduce thermal or control characteristics incompatible with the load.

Q: Are packaging and mounting configurations identical?

A: Both parts are supplied as modules in chassis mount configuration. The SWT861790 is packaged individually, while the SGT8698503 is supplied in box packaging. Mechanical mounting compatibility is confirmed for both components.

Q: What is the series designation for the substitute part?

A: The SGT8698503 is designated as part of the cel3pac® series from Celduc Inc., representing an active product line with ongoing manufacturer support.