SPD-277P-10KA Equivalent & Substitute Parts

Part Overview

The SPD-277P-10KA is a transient voltage suppressor (TVS) module designed for lighting surge protection in 120-277VAC applications. Manufactured by ERP Power, LLC, this single-pole device provides thermal protection with a maximum continuous operating voltage (MCOV) of 320VAC and a maximum discharge current of 10 kA at 8/20µS pulse duration. The product is currently obsolete, making identification of functionally equivalent alternatives essential for system maintenance and component replacement in existing installations.

Substiute Parts

SPD-277P-10KA

ERP Power, LLCIn Stock: 1103SPD-277P-10KA Datasheet

Current PartRFQ

BSP3-277

Thomas Research ProductsIn Stock: 1020BSP3-277 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPD-277P-10KA is determined by the following critical parameters:

Voltage Rating Compatibility: The substitute must support a maximum continuous operating voltage (MCOV) of 320VAC or higher to maintain protection in 120-277VAC circuits.

Discharge Current Capacity: The substitute must handle a maximum discharge current of 10 kA at 8/20µS pulse duration to provide equivalent surge suppression performance.

Form Factor and Mounting: The substitute must be a module-only form with free-hanging mounting capability to fit existing installation configurations.

Regulatory Compliance: The substitute must maintain cURus approval or equivalent recognized certification to ensure code compliance in the target application.

Environmental Specifications: The substitute must support the operating temperature range of -40°C to 85°C and maintain MSL 1 rating for storage and handling.

The BSP3-277 from Thomas Research Products meets these substitution criteria with equivalent voltage and current ratings, compatible form factor, and appropriate regulatory certifications.

Parameter Comparison

Engineering Selection Recommendations

The BSP3-277 is a direct functional equivalent for the obsolete SPD-277P-10KA in 120-277VAC lighting surge protection applications. Both devices share identical maximum discharge current capacity (10 kA at 8/20µS), equivalent voltage ratings (320VAC MCOV), and compatible form factors (module-only, free-hanging mounting).

The BSP3-277 offers additional advantages: active product status ensures ongoing availability and supply chain continuity, dual voltage rating capability (320VAC and 420VDC) provides flexibility for mixed-voltage installations, and expanded regulatory approval (cURus and UL) exceeds the original cURus-only certification.

Both components maintain MSL 1 rating and RoHS compliance, ensuring compatibility with modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the BSP3-277 directly replace the SPD-277P-10KA in existing installations?

A: Yes. Both devices share identical maximum discharge current (10 kA), equivalent voltage ratings (320VAC MCOV), and compatible mounting configurations (free-hanging module form). The BSP3-277 meets or exceeds all electrical and mechanical parameters of the original component.

Q: What is the significance of the BSP3-277 having three poles versus the SPD-277P-10KA's single pole?

A: The pole count reflects internal circuit configuration. The BSP3-277's three-pole design does not prevent single-pole application; the device remains compatible with single-phase 120-277VAC circuits. The additional poles provide flexibility for multi-phase or multi-circuit installations if required.

Q: Does the BSP3-277's dual voltage rating (320VAC and 420VDC) affect compatibility?

A: No. The dual rating indicates the BSP3-277 supports both AC and DC voltage applications. For 120-277VAC AC applications, the 320VAC rating applies and matches the original SPD-277P-10KA specification.

Q: Are there packaging differences between these components?

A: The SPD-277P-10KA packaging is not specified in available data. The BSP3-277 is supplied in box packaging. Verify packaging requirements for your specific procurement and storage procedures.

Q: What certifications should I verify for code compliance?

A: Both components carry cURus approval. The BSP3-277 additionally holds UL certification. Confirm that your installation code or project specification accepts these certifications for the intended application.