BSP3-277-20KA Equivalent & Substitute Parts

Part Overview

The BSP3-277-20KA is a three-pole transient voltage suppressor module manufactured by Thomas Research Products, designed for lighting surge protection across 100-277V systems. This active product provides 20 kA discharge capacity and operates at a maximum continuous voltage of 320VAC/420VDC. The module is free-hanging mounted and holds CE, cURus, and UL certifications. Substitute parts are identified when equivalent voltage ratings, discharge capacities, and regulatory compliance align with application requirements for single-pole or multi-pole configurations.

Substiute Parts

BSP3-277-20KA

Thomas Research ProductsIn Stock: 1048BSP3-277-20KA Datasheet

Current PartRFQ

LSP10120P

Littelfuse Inc.In Stock: 977LSP10120P Datasheet

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LSP10240P

Littelfuse Inc.In Stock: 1173LSP10240P Datasheet

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LSP10277P

Littelfuse Inc.In Stock: 930LSP10277P Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BSP3-277-20KA are identified based on the following electrical and mechanical parameters:

• Voltage - Continuous Operating (Max) (MCOV): Substitute parts must support equivalent or higher voltage ratings to ensure safe operation within the same system voltage class
• Current - Discharge (Max) (8/20µS): Substitute parts must support the 20 kA maximum discharge capacity
• Approval Agency: Substitute parts must maintain CE, cURus, and UL certifications for regulatory compliance
• Product Status: All substitute parts must be active products
• RoHS Compliance: Substitute parts must meet RoHS requirements

The three identified substitutes (LSP10120P, LSP10240P, LSP10277P) are single-pole Littelfuse modules that address specific voltage classes within the 100-277V range. Each substitute is selected for applications requiring single-pole protection at its respective voltage rating while maintaining the 20 kA maximum discharge capacity and full regulatory certification.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain active product status and hold CE, cURus, and UL certifications equivalent to the main part. The LSP10277P provides the closest electrical match with 320VAC MCOV rating and 20 kA maximum discharge capacity, suitable for direct substitution in 277V applications. The LSP10240P supports 275VAC MCOV and addresses 240V system requirements. The LSP10120P is designated for 120V applications with 150VAC MCOV. Selection between substitutes depends on the specific voltage class of the protected circuit. All substitutes meet ROHS3 compliance and maintain the required 20 kA maximum discharge specification.

Frequently Asked Questions (FAQ)

Q: Can LSP10277P directly replace BSP3-277-20KA? A: LSP10277P matches the 320VAC MCOV and 20 kA maximum discharge capacity of BSP3-277-20KA. The primary difference is pole configuration: LSP10277P is single-pole while BSP3-277-20KA is three-pole. Application requirements determine compatibility.

Q: What is the significance of the 8/20µS discharge current specification? A: The 8/20µS waveform is the standard test pulse for transient voltage suppressors per IEC 61643-1. Nominal and maximum discharge currents at this waveform define the device's surge handling capability. All listed parts support 20 kA maximum discharge at this specification.

Q: Why do substitute parts have lower nominal discharge current (10 kA) than the main part (20 kA)? A: Nominal discharge current represents typical operation, while maximum discharge current represents peak capability. All substitutes maintain the 20 kA maximum discharge specification required for compatibility.

Q: How does mounting type affect substitution? A: BSP3-277-20KA uses free-hanging mounting while all substitutes use screw mounting. Installation method and mechanical integration differ accordingly. System design must accommodate the selected mounting configuration.

Q: Are all parts RoHS compliant? A: BSP3-277-20KA is RoHS Compliant. All substitutes are ROHS3 Compliant, which represents an updated RoHS standard. Both compliance levels are acceptable for equivalent material restriction purposes.