BK/C520-2A Equivalent & Substitute Parts

Part Overview

The BK/C520-2A is a 2 A, 250 V AC/DC fast-blow glass cartridge fuse in 2AG package format (5mm x 15mm) manufactured by Eaton - Electronics Division. This component is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain circuit protection functionality in applications where the original part is no longer available through standard distribution channels. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and approval certifications to ensure direct compatibility without circuit redesign.

Substiute Parts

BK/C520-2A

Eaton - Electronics DivisionIn Stock: 1124BK/C520-2A Datasheet

Current PartRFQ

BK/C520-2-R

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

DirectRFQ

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 BK/C520-2A are grouped based on strict electrical and mechanical parameter alignment:

Direct Substitute Category: The BK/C520-2-R (Eaton - Electronics Division) is a direct substitute. It maintains identical electrical specifications: 2 A current rating, 250 V AC voltage rating, fast-blow response time, 100A breaking capacity, and 2AG package dimensions. The primary distinction is product status: BK/C520-2-R is active, whereas BK/C520-2A is obsolete. Both parts share identical melting I²t values (1.9) and DC cold resistance (0.064 Ohms). Approval certifications (CSA, UL) are equivalent.

Compatible Substitute Category: The Littelfuse 0225002.VXP, 0225002.HXP, and 0225002.MXP parts are compatible substitutes. These parts maintain the core electrical parameters: 2 A current rating, 250 V AC voltage rating, fast-blow response time, and 2AG package format. Key differences include:

• Extended DC voltage rating (125 V DC vs. no DC rating specified for main part)
• Enhanced breaking capacity for DC applications (10kA DC vs. 100A AC only)
• Lower melting I²t value (1.5 vs. 1.9)
• Expanded approval certifications (CE, CSA, PSE, UL vs. CSA, UL)
• Improved RoHS compliance status (ROHS3 Compliant vs. non-compliant)
• Extended operating temperature range (-55°C ~ 125°C)

Substitution is valid where the application operates within 250 V AC and does not require the specific melting I²t characteristic of 1.9.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): Select BK/C520-2-R when the application requires exact electrical and thermal characteristics matching the original BK/C520-2A specification. This part maintains identical melting I²t (1.9) and DC cold resistance (0.064 Ohms), ensuring circuit protection behavior is preserved. BK/C520-2-R is active product status with current manufacturing support and improved RoHS3 compliance.

For Compatible Substitution: Select 0225002.VXP, 0225002.HXP, or 0225002.MXP when the application operates within 250 V AC and the lower melting I²t value (1.5) is acceptable. These Littelfuse parts provide enhanced DC voltage capability (125 V DC) and expanded approval certifications (CE, CSA, PSE, UL). All three Littelfuse variants are active products with ROHS3 compliance and extended operating temperature range (-55°C ~ 125°C). Selection among the three Littelfuse options is based on packaging and inventory availability, as electrical specifications are identical.

Compliance Consideration: Applications requiring RoHS3 compliance must use BK/C520-2-R or Littelfuse variants, as the original BK/C520-2A is non-compliant.

Frequently Asked Questions (FAQ)

Q: Can BK/C520-2-R be used as a direct replacement for BK/C520-2A? A: Yes. BK/C520-2-R maintains identical electrical ratings (2 A, 250 V AC), response time (fast-blow), breaking capacity (100A), melting I²t (1.9), and package format (2AG, 5mm x 15mm). The primary difference is product status: BK/C520-2-R is active while BK/C520-2A is obsolete.

Q: What is the difference between the Eaton BK/C520-2-R and Littelfuse 0225002 series? A: The Littelfuse parts (0225002.VXP, 0225002.HXP, 0225002.MXP) have a lower melting I²t value (1.5 vs. 1.9) and include DC voltage rating (125 V DC). They are suitable for applications where the lower thermal characteristic is acceptable and DC protection is required. All three Littelfuse variants have identical electrical specifications.

Q: Are 0225002.VXP, 0225002.HXP, and 0225002.MXP interchangeable? A: Yes. These three Littelfuse part numbers have identical electrical specifications, approval certifications, and performance characteristics. Selection is based on packaging format and inventory availability.

Q: Does the lower melting I²t value (1.5) of Littelfuse parts affect circuit protection? A: The melting I²t value determines the thermal energy required to melt the fuse element. A lower value (1.5 vs. 1.9) means the fuse responds to thermal stress more quickly. Substitution is valid only if the application circuit design does not depend on the specific 1.9 I²t characteristic of the original part.

Q: Can these fuses be used in DC applications? A: BK/C520-2A and BK/C520-2-R do not specify DC voltage ratings. Littelfuse 0225002 series parts are rated for 125 V DC and 100A AC / 10kA DC breaking capacity, making them suitable for DC applications within these limits.

Q: What is the significance of the 2AG package format? A: The 2AG designation specifies the physical dimensions (5mm x 15mm) and holder compatibility. All substitute parts use the 2AG package format, ensuring mechanical compatibility with existing fuse holders without modification.

Q: Are all substitute parts RoHS3 compliant? A: BK/C520-2-R and all Littelfuse variants (0225002.VXP, 0225002.HXP, 0225002.MXP) are ROHS3 compliant. The original BK/C520-2A is non-compliant.