Equivalent & Substitute Parts for Eaton BK/C520-2-R Glass Cartridge Fuse

Part Overview

The Eaton BK/C520-2-R is a 2A 250VAC fast-blow glass cartridge fuse in 2AG package format (5mm x 15mm). This component is classified as Active product status and is designed for AC circuit protection applications requiring holder-based mounting. Substitute parts are identified to provide alternative sourcing options when the primary manufacturer part becomes unavailable or when supply chain optimization is required.

Substiute Parts

BK/C520-2-R

Eaton - Electronics DivisionIn Stock: 1166BK/C520-2-R Datasheet

Current PartRFQ

0225002.VXP

Littelfuse Inc.In Stock: 10890225002.VXP Datasheet

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0225002.HXP

Littelfuse Inc.In Stock: 73310225002.HXP Datasheet

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0225002.MXP

Littelfuse Inc.In Stock: 23980225002.MXP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Eaton BK/C520-2-R are qualified based on the following critical parameters that must match or exceed the main part specifications:

Mandatory Matching Parameters:

• Current Rating: 2 A
• Voltage Rating - AC: 250 V
• Fuse Type: Cartridge, Glass
• Package / Case: 2AG, 5mm x 15mm
• Response Time: Fast Blow
• Mounting Type: Requires Holder
• Breaking Capacity @ Rated Voltage: 100A minimum

Acceptable Variation Parameters:

• Melting I²t: 1.5 to 1.9 (substitute parts at 1.5 remain within acceptable thermal characteristics)
• DC Voltage Rating: Substitute parts rated for 125VDC provide additional capability beyond the main part's AC-only specification
• Operating Temperature Range: Substitute parts with -55°C ~ 125°C provide extended environmental performance
• Approval Agencies: Substitute parts with CE, CSA, PSE, UL certifications exceed the main part's CSA, UL certifications

The three Littelfuse substitute parts (0225002.VXP, 0225002.HXP, 0225002.MXP) are functionally equivalent for AC circuit protection applications and are interchangeable within the 2AG holder form factor.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - Eaton BK/C520-2-R: Select the Eaton BK/C520-2-R when the original equipment manufacturer specification explicitly requires Eaton components or when CSA and UL certifications are the sole compliance requirement. Current inventory of 1106 pieces supports immediate availability.

Substitute Selection - Littelfuse 0225002 Series: The three Littelfuse substitute parts (0225002.VXP, 0225002.HXP, 0225002.MXP) are suitable for applications where:

• AC circuit protection at 2A, 250V is the primary function
• 2AG holder form factor compatibility is required
• Extended environmental operating range (-55°C ~ 125°C) is beneficial
• Enhanced approval certifications (CE, CSA, PSE, UL) meet or exceed application requirements
• DC voltage capability (125V) provides additional circuit protection flexibility

Inventory Considerations:

• Littelfuse 0225002.HXP: 7231 pieces (highest availability)
• Littelfuse 0225002.MXP: 2347 pieces
• Littelfuse 0225002.VXP: 997 pieces
• Eaton BK/C520-2-R: 1106 pieces

All substitute parts maintain ROHS3 compliance and are classified as Active product status.

Frequently Asked Questions (FAQ)

Q: Can Littelfuse 0225002 series fuses be used as direct replacements for Eaton BK/C520-2-R in existing equipment?

A: Yes, the Littelfuse 0225002.VXP, 0225002.HXP, and 0225002.MXP fuses are mechanically and electrically compatible substitutes. All parts share identical current rating (2A), AC voltage rating (250V), fuse type (cartridge glass), package format (2AG, 5mm x 15mm), response time (fast blow), and breaking capacity (100A). The parts are interchangeable within any 2AG holder-based circuit.

Q: What is the difference between the three Littelfuse substitute part numbers?

A: The three Littelfuse part numbers (0225002.VXP, 0225002.HXP, 0225002.MXP) are electrically and mechanically identical. The suffix designations (.VXP, .HXP, .MXP) represent different packaging or distribution channel variants. All three parts carry identical electrical specifications, certifications, and performance characteristics. Selection between them is based on inventory availability and supply chain requirements.

Q: Why do the Littelfuse substitutes have a lower Melting I²t value (1.5) compared to the Eaton part (1.9)?

A: The Melting I²t parameter indicates the thermal energy required to melt the fuse element. The Littelfuse value of 1.5 is lower than the Eaton value of 1.9, which means the Littelfuse fuses will respond slightly faster to overcurrent conditions. Both values fall within the acceptable range for 2A fast-blow cartridge fuses and do not affect functional compatibility. The lower I²t value provides equivalent or improved circuit protection performance.

Q: Are the Littelfuse substitutes suitable for DC applications?

A: The Littelfuse 0225002 series fuses are rated for 125V DC operation, whereas the Eaton BK/C520-2-R does not specify a DC voltage rating. If the application requires DC circuit protection, the Littelfuse substitutes provide this additional capability. However, if the original application is AC-only, the DC rating does not affect performance or compatibility.

Q: What certifications do the substitute parts carry?

A: The Littelfuse 0225002 series carries CE, CSA, PSE, and UL certifications. The Eaton BK/C520-2-R carries CSA and UL certifications. The Littelfuse parts exceed the certification requirements of the original part, making them suitable for applications requiring broader international compliance (CE for European markets, PSE for Japanese markets).

Q: Can these fuses be used in temperature-critical applications?

A: The Littelfuse 0225002 series is rated for -55°C to 125°C operating temperature range. The Eaton BK/C520-2-R does not specify an operating temperature range. If the application requires operation outside standard room temperature conditions, the Littelfuse substitutes provide documented thermal performance specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all three Littelfuse substitute parts (0225002.VXP, 0225002.HXP, 0225002.MXP) and the Eaton BK/C520-2-R are ROHS3 compliant, meeting environmental and hazardous substance restrictions.