SCHURTER 7030.3270 Equivalent & Substitute Parts

Part Overview

The SCHURTER 7030.3270 is a 400 mA slow-blow glass cartridge fuse rated for 220 V AC and 32 V DC operation in a 5mm x 20mm form factor. This fuse is designed for applications requiring overcurrent protection in low-voltage DC and AC circuits with moderate current demands. The part is classified as obsolete, necessitating identification of active equivalent components that maintain functional compatibility with existing circuit designs and holder assemblies.

Substiute Parts

7030.3270

SCHURTER Inc.In Stock: 8347030.3270 Datasheet

Current PartRFQ

0034.5039

SCHURTER Inc.In Stock: 11500034.5039 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCHURTER 7030.3270 is determined by the following critical parameters that must remain constant or be compatible with the original circuit design:

Mandatory Matching Parameters:

• Current Rating: 400 mA (exact match required)
• Package / Case: 5mm x 20mm (physical form factor compatibility with existing holders)
• Fuse Type: Cartridge, Glass (mechanical and electrical compatibility)
• Response Time: Slow Blow (circuit protection characteristic)
• Mounting Type: Requires Holder (installation method compatibility)

Voltage Rating Considerations: The original part operates at 220 V AC and 32 V DC. Substitute parts must maintain voltage ratings equal to or exceeding the original specifications to ensure safe operation in the intended circuit environment.

Identified Substitute: The SCHURTER 0034.5039 meets all mandatory matching parameters with the following characteristics: identical 400 mA current rating, identical 5mm x 20mm package dimensions, glass cartridge construction, and slow-blow response time. The substitute provides enhanced voltage ratings (250 V AC) and improved temperature operating range (-40°C ~ 85°C), making it suitable for direct replacement in applications originally designed for the 7030.3270.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SCHURTER 0034.5039

The SCHURTER 0034.5039 is the direct functional equivalent for the obsolete 7030.3270. Selection of this substitute is based on the following engineering criteria:

Product Status: The 0034.5039 maintains active product status, ensuring continued availability and supply chain reliability for new designs and replacement applications.

Compliance and Certification: The substitute carries cURus approval certification, providing enhanced regulatory coverage compared to the original UR certification. This expanded certification scope supports broader application deployment across North American and international markets.

Physical and Electrical Compatibility: The substitute maintains identical current rating (400 mA), package dimensions (5mm x 20mm), and response characteristic (slow-blow), ensuring direct mechanical and electrical compatibility with existing 5mm x 20mm fuse holders and circuit designs.

Enhanced Operating Parameters: The substitute provides improved voltage rating (250 V AC versus 220 V AC) and extended operating temperature range (-40°C ~ 85°C versus -40°C ~ 70°C), offering greater design margin and environmental tolerance for the protected circuit.

RoHS and Environmental Compliance: The substitute is ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations for component procurement and end-of-life management.

Frequently Asked Questions (FAQ)

Q: Can the SCHURTER 0034.5039 be used as a direct replacement for the 7030.3270 in existing circuit designs?

A: Yes. The 0034.5039 maintains identical current rating (400 mA), package dimensions (5mm x 20mm), fuse type (glass cartridge), and response time (slow-blow). Both parts require the same 5mm x 20mm holder assembly. The substitute provides equal or superior voltage ratings and operating temperature range, ensuring functional compatibility in circuits originally designed for the 7030.3270.

Q: What are the key differences between the original and substitute part?

A: The primary differences are product status (obsolete versus active), voltage rating (220 V AC original versus 250 V AC substitute), operating temperature range (-40°C ~ 70°C original versus -40°C ~ 85°C substitute), approval certification (UR original versus cURus substitute), and melting I²t characteristic (0.64 original versus 5.2 substitute). The substitute also includes ROHS3 compliance and REACH unaffected status.

Q: Are the physical dimensions identical between the two parts?

A: The parts share the same 5mm x 20mm package specification. Minor dimensional variations exist: the original measures 0.197" diameter x 0.787" length (5.00mm x 20.00mm), while the substitute measures 0.205" diameter x 0.787" length (5.20mm x 20.00mm). These variations remain within standard tolerance for 5mm x 20mm cartridge fuse form factors and do not affect holder compatibility.

Q: What is the significance of the different breaking capacity ratings?

A: The original part specifies 50A breaking capacity at rated voltage, while the substitute specifies 35A. Breaking capacity indicates the maximum fault current the fuse can safely interrupt. The substitute's 35A breaking capacity remains suitable for standard low-voltage circuit protection applications. Circuit designers must verify that the substitute's breaking capacity meets the maximum prospective fault current of the protected circuit.

Q: Does the higher melting I²t value of the substitute affect circuit protection?

A: The substitute exhibits a melting I²t of 5.2 compared to the original's 0.64. This parameter describes the thermal energy required to melt the fuse element. The higher value indicates a slightly slower thermal response, consistent with slow-blow fuse characteristics. Both parts maintain the same 400 mA current rating and slow-blow response classification, ensuring equivalent protection behavior in standard circuit applications.

Q: What certifications apply to each part?

A: The original 7030.3270 carries UR (Underwriters Laboratories) certification. The substitute 0034.5039 carries cURus certification, which combines UL (Underwriters Laboratories) and CSA (Canadian Standards Association) approvals. The cURus certification provides broader regulatory recognition for North American and international applications.

Q: Is the substitute RoHS compliant?

A: Yes. The SCHURTER 0034.5039 is ROHS3 compliant and REACH unaffected, meeting current environmental regulations for hazardous substance restrictions in electrical and electronic equipment.