SWT861730 Equivalent & Substitute Parts

Part Overview

The SWT861730 is a solid-state relay (SSR) module manufactured by Celduc Inc., configured as a single-pole single-throw normally open (SPST-NO) device. This component is rated for 28 A load current with input voltage of 24 VAC/DC and load voltage range of 24 V to 520 V. The device features AC output with zero-cross switching capability and is housed in a chassis-mount module package.

The SWT861730 is classified as obsolete. Locating equivalent or substitute components is necessary to support system maintenance, repair, and new design implementations where this model is no longer available through standard distribution channels.

Substiute Parts

SWT861730

Celduc Inc.In Stock: 839SWT861730 Datasheet

Current PartRFQ

SGT8698503

Celduc Inc.In Stock: 792SGT8698503 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SWT861730 is based on functional and electrical compatibility within the Celduc Inc. product family. The primary substitute identified is the SGT8698503, which shares the following critical parameters with the original part:

Common Substitution Criteria:

• Manufacturer: Celduc Inc.
• Output Type: AC, Zero Cross
• Load Voltage Range: 24 V ~ 520 V
• Mounting Type: Chassis Mount
• Package Type: Module
• RoHS Compliance: RoHS Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The SGT8698503 is an active product within the cel3pac® series, ensuring ongoing availability and support. While the substitute part features a different circuit configuration (3PST-NO versus SPST-NO) and higher current rating (125 A versus 28 A), these differences represent functional enhancements rather than incompatibilities for applications requiring the original specifications.

Parameter Comparison

Engineering Selection Recommendations

The SGT8698503 is the manufacturer-recommended substitute for the obsolete SWT861730. Selection of this substitute is supported by the following factors:

Product Status: The SGT8698503 maintains active product status within the Celduc Inc. portfolio, ensuring continued availability, technical support, and supply chain reliability. The original SWT861730 is obsolete and no longer supported.

Compliance and Certification: Both parts maintain RoHS compliance and identical moisture sensitivity ratings, ensuring compatibility with regulatory requirements and environmental specifications.

Electrical Compatibility: The substitute part operates within the same load voltage range (24 V to 520 V) and employs identical AC zero-cross output switching technology. The input voltage specification of the SGT8698503 (24 ~ 255 VAC/DC) encompasses the original part's 24 VAC/DC requirement.

Functional Enhancement: The SGT8698503 provides increased current capacity (125 A versus 28 A) and lower on-state resistance (2 mOhms maximum), representing performance improvements over the original specification.

Circuit Configuration Difference: The SGT8698503 is configured as a 3PST-NO (three-pole) device compared to the SPST-NO (single-pole) configuration of the SWT861730. Applications requiring single-pole switching must account for this architectural difference during integration.

Frequently Asked Questions (FAQ)

Q: Can the SGT8698503 directly replace the SWT861730 in existing applications?

A: The SGT8698503 shares critical electrical parameters including load voltage range, output type, and switching characteristics. However, the circuit configuration differs: the SGT8698503 provides three independent switching poles (3PST-NO) versus the single pole (SPST-NO) of the original part. Applications must be evaluated to determine if the additional poles create compatibility issues or if only a single pole is required for operation.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by matching the following parameters: output type (AC, zero cross), load voltage range (24 V ~ 520 V), input voltage compatibility, mounting type (chassis mount), package type (module), and compliance certifications (RoHS). The SGT8698503 satisfies all these criteria.

Q: Why is the SGT8698503 rated for higher current (125 A) than the SWT861730 (28 A)?

A: The SGT8698503 is a three-pole device with enhanced current capacity. This represents a design advancement within the Celduc product family. Applications requiring only 28 A operation can utilize the SGT8698503 without exceeding component ratings.

Q: Are there packaging differences between these parts?

A: Both parts are supplied in module packages suitable for chassis mounting. The SWT861730 was supplied in standard packaging, while the SGT8698503 is supplied in a box. Both maintain identical mounting and integration characteristics.

Q: What is the on-state resistance specification, and why does it matter?

A: The SGT8698503 specifies a maximum on-state resistance of 2 mOhms. This parameter defines the resistance of the relay contacts during the closed (conducting) state and directly affects power dissipation and voltage drop across the relay. Lower on-state resistance reduces heat generation and improves efficiency.

Q: Is the SGT8698503 available in current inventory?

A: The SGT8698503 is an active product with 734 pieces in new original stock, ensuring immediate availability for procurement and deployment.