Littelfuse 0977010.MXEP Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0977010.MXEP is a 10 A ceramic cartridge fuse rated for 500 V AC and 450 V DC operation in a 5mm x 20mm axial package. This slow-blow fuse is designed for through-hole mounting applications requiring reliable overcurrent protection in industrial and electronic equipment. The part maintains active product status with robust inventory availability. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or application-specific voltage margin requirements.

Substiute Parts

0977010.MXEP

Littelfuse Inc.In Stock: 19500977010.MXEP Datasheet

Current PartRFQ

0ADKP9100-RE

Bel Fuse Inc.In Stock: 10670ADKP9100-RE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 0977010.MXEP is determined by the following critical parameters:

• Current Rating: Must be 10 A (exact match required)
• Package / Case: Must be 5mm x 20mm axial configuration (mechanical compatibility)
• Fuse Type: Must be ceramic cartridge with slow-blow response time
• Mounting Type: Must be through-hole compatible
• Voltage Ratings: AC and DC voltage ratings must meet or exceed the application requirements (500 V AC minimum, 450 V DC minimum)
• Operating Temperature: Must support -55°C ~ 125°C range
• RoHS Compliance: Must maintain ROHS3 compliance status

The Bel Fuse Inc. 0ADKP9100-RE qualifies as a direct substitute based on matching current rating, package dimensions, fuse type, and operating temperature range. The substitute provides enhanced voltage ratings (600 V AC / 500 V DC) and improved breaking capacity, making it suitable for applications requiring higher voltage margins or increased fault current handling.

Parameter Comparison

Engineering Selection Recommendations

Both the Littelfuse 0977010.MXEP and Bel Fuse 0ADKP9100-RE maintain active product status with full RoHS3 compliance and REACH unaffected designation. Selection between these parts should be based on application voltage requirements and fault current handling capacity.

The Littelfuse 0977010.MXEP is the primary choice for applications operating at or below 500 V AC and 450 V DC with fault currents not exceeding 100 A AC or 200 A DC. This part carries CE and PSE certifications.

The Bel Fuse 0ADKP9100-RE is suitable for applications requiring higher voltage margins (600 V AC / 500 V DC) or increased breaking capacity (200 A AC / 300 A DC). This part carries cURus certification. The higher melting I²t value (400 versus 249) indicates a slightly slower thermal response characteristic, which may be relevant for applications with transient current conditions.

Both parts are mechanically and electrically compatible within their respective voltage and current ratings, with identical package dimensions and operating temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can the Bel Fuse 0ADKP9100-RE be used as a direct replacement for the Littelfuse 0977010.MXEP?

A: Yes, the Bel Fuse 0ADKP9100-RE is mechanically and electrically compatible. Both parts share identical current ratings (10 A), package dimensions (5mm x 20mm axial), fuse type (ceramic cartridge), response time (slow blow), and operating temperature range (-55°C ~ 125°C). The substitute provides higher voltage ratings and breaking capacity, making it suitable for applications where the original part is unavailable or where enhanced voltage margins are beneficial.

Q: What are the key differences between these two fuses?

A: The primary differences are voltage ratings and breaking capacity. The Bel Fuse part provides 600 V AC (versus 500 V AC) and 500 V DC (versus 450 V DC), with breaking capacity of 200 A AC / 300 A DC compared to 100 A AC / 200 A DC. The melting I²t is also higher (400 versus 249), indicating a slightly different thermal response. Certifications differ: Littelfuse carries CE and PSE; Bel Fuse carries cURus.

Q: Are there any mechanical compatibility concerns when substituting?

A: No. Both parts use identical 5mm x 20mm axial package dimensions and through-hole mounting configuration. Physical installation in existing PCB or panel-mount fuse holders is directly compatible.

Q: Which part should be selected for new designs?

A: Selection depends on application voltage and fault current requirements. For applications operating at 500 V AC / 450 V DC or below with fault currents up to 100 A AC / 200 A DC, either part is acceptable. For applications requiring higher voltage ratings or fault current handling, the Bel Fuse 0ADKP9100-RE is the appropriate choice.

Q: Do both parts meet the same compliance standards?

A: Both parts are ROHS3 compliant and REACH unaffected. Certification agencies differ: Littelfuse 0977010.MXEP carries CE and PSE certifications; Bel Fuse 0ADKP9100-RE carries cURus certification. Application-specific regulatory requirements should determine which certification is required.