SCHURTER 3-103-100 Surface Mount Fuse Equivalent & Substitute Parts

Part Overview

The SCHURTER 3-103-100 is a 500 mA, 125 V AC/DC surface mount board fuse in 2-SMD square end block package. This component is classified as Active product status and is designed for applications requiring fast-blow fuse protection in compact surface mount configurations. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity across SCHURTER's MGA and MGA-A fuse series.

Substiute Parts

3-103-100

SCHURTER Inc.In Stock: 7833-103-100 Datasheet

Current PartRFQ

3410.0027.02

SCHURTER Inc.In Stock: 17713410.0027.02 Datasheet

UpgradeRFQ

3410.0027.03

SCHURTER Inc.In Stock: 39933410.0027.03 Datasheet

UpgradeRFQ

3-103-098

SCHURTER Inc.In Stock: 17483-103-098 Datasheet

Parametric EquivalentRFQ

3-103-099

SCHURTER Inc.In Stock: 80503-103-099 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3-103-100 are classified into two categories based on electrical and mechanical compatibility:

Upgrade Parts (Series MGA):

• 3410.0027.02
• 3410.0027.03

These parts maintain identical electrical specifications (500 mA, 125 V AC/DC, fast-blow response, 50 A AC / 300 A DC breaking capacity) and mechanical dimensions. They differ in operating temperature range (-55°C ~ 150°C versus -55°C ~ 125°C) and melting I²t value (0.0042 versus 0.0004). Approval agency certification is cURus only, compared to cURus and UL for the main part.

Parametric Equivalents (Series MGA-A):

• 3-103-098
• 3-103-099

These parts are identical to the main part 3-103-100 in all electrical and mechanical parameters, including melting I²t (0.0004), operating temperature (-55°C ~ 125°C), and dual approval agency certification (cURus, UL). The only difference is packaging: 3-103-098 is supplied in Tape & Reel (TR), while 3-103-099 is supplied in Cut Tape (CT).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select 3-103-098 or 3-103-099 when exact electrical and thermal performance matching is required. Both maintain the MGA-A series designation, identical melting I²t (0.0004), operating temperature range (-55°C ~ 125°C), and dual approval agency certification (cURus, UL). Choose 3-103-099 if Cut Tape packaging is preferred for lower-volume applications; select 3-103-098 for Tape & Reel packaging in high-volume production environments.

For Extended Temperature Operation: Select 3410.0027.02 or 3410.0027.03 when operating temperature range of -55°C ~ 150°C is required. These MGA series parts provide higher temperature capability. Note that approval agency certification is limited to cURus, and melting I²t is 0.0042 compared to 0.0004 for the main part. Both parts are available in Tape & Reel packaging with higher inventory levels (1739 and 3943 units respectively).

All substitute parts maintain identical current rating (500 mA), voltage ratings (125 V AC/DC), response time (fast-blow), breaking capacity (50 A AC / 300 A DC), and physical dimensions (0.126" L x 0.061" W x 0.061" H). All parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99.

Frequently Asked Questions (FAQ)

Q: Can 3410.0027.02 or 3410.0027.03 be used as direct replacements for 3-103-100?

A: These parts are electrically compatible in terms of current rating, voltage, and breaking capacity. However, they differ in melting I²t (0.0042 versus 0.0004), operating temperature range (-55°C ~ 150°C versus -55°C ~ 125°C), and approval agency certification (cURus only versus cURus and UL). Selection depends on application requirements for thermal performance and regulatory compliance.

Q: What is the difference between 3-103-098 and 3-103-099?

A: Both parts are parametrically identical to the main part 3-103-100. The only difference is packaging: 3-103-098 is supplied in Tape & Reel (TR) format, while 3-103-099 is supplied in Cut Tape (CT) format. Tape & Reel is standard for automated assembly in high-volume production; Cut Tape is used for lower-volume or manual assembly applications.

Q: Are all substitute parts surface mount compatible with the same PCB footprint?

A: Yes. All parts maintain identical package designation (2-SMD, Square End Block) and physical dimensions (0.126" L x 0.061" W x 0.061" H / 3.20mm x 1.55mm x 1.55mm), ensuring compatibility with the same PCB footprint and assembly process.

Q: What does melting I²t represent, and why does it differ between parts?

A: Melting I²t is a thermal characteristic that defines the fuse's energy absorption capacity before melting. The main part 3-103-100 and parametric equivalents (3-103-098, 3-103-099) have melting I²t of 0.0004, while upgrade parts (3410.0027.02, 3410.0027.03) have 0.0042. This difference reflects different thermal response characteristics and should be evaluated based on application circuit protection requirements.

Q: Which substitute part has the highest inventory availability?

A: Part 3-103-099 has the highest inventory with 7976 units in stock, followed by 3410.0027.03 with 3943 units. The main part 3-103-100 has 691 units available.