SCHURTER 3-103-110 Surface Mount Fuse Equivalent & Substitute Parts

Part Overview

The SCHURTER 3-103-110 is a 1.5 A 125 V AC/DC surface mount board fuse in 2-SMD square end block package format. 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 based on matching electrical ratings, mechanical dimensions, and packaging compatibility within the MGA series fuse family.

Key Parameters

Parameter	Value
Current Rating	1.5 A
Voltage Rating AC	125 V
Voltage Rating DC	125 V
Response Time	Fast Blow
Package / Case	2-SMD, Square End Block
Mounting Type	Surface Mount
Breaking Capacity AC	50 A
Breaking Capacity DC	300 A
Operating Temperature Range	-55°C ~ 125°C
Size / Dimension	0.126" L x 0.061" W x 0.061" H (3.20mm x 1.55mm x 1.55mm)
RoHS Status	ROHS3 Compliant
Approval Agency	cURus, UL

Substitute Part Grouping Explanation

Substitution eligibility for the 3-103-110 is determined by the following critical parameters: current rating, voltage ratings (AC and DC), package type (2-SMD square end block), mounting type (surface mount), response time (fast blow), and physical dimensions. All substitute parts must maintain identical or functionally equivalent electrical and mechanical specifications to ensure direct replacement capability.

The substitute parts are grouped as follows:

Packaging Variant (Direct Equivalent): Part 3-103-111 maintains identical electrical specifications and series designation (MGA-A) with only packaging format difference (Cut Tape vs. Tape & Reel).

Upgrade Variants (Same Electrical Rating, Different Series): Part 3410.0033.01 provides identical 1.5 A rating with MGA series designation and Strip packaging, with enhanced operating temperature range (-55°C ~ 150°C) and improved melting I²t specification (0.064 vs. 0.014).

Downgrade Variant (Lower Current Rating): Part 3410.0031.03 operates at 1 A rating with MGA series designation, suitable only for applications with reduced current requirements, featuring enhanced operating temperature range (-55°C ~ 150°C).

Parameter Comparison

Parameter	3-103-110 (Main)	3-103-111	3410.0033.01	3410.0031.03
Manufacturer	SCHURTER Inc.	SCHURTER Inc.	SCHURTER Inc.	SCHURTER Inc.
Current Rating (Amps)	1.5 A	1.5 A	1.5 A	1 A
Voltage Rating AC	125 V	125 V	125 V	125 V
Voltage Rating DC	125 V	125 V	125 V	125 V
Response Time	Fast Blow	Fast Blow	Fast Blow	Fast Blow
Package / Case	2-SMD, Square End Block	2-SMD, Square End Block	2-SMD, Square End Block	2-SMD, Square End Block
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Breaking Capacity AC	50 A	50 A	50 A	50 A
Breaking Capacity DC	300 A	300 A	300 A	300 A
Operating Temperature Range	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 150°C	-55°C ~ 150°C
Size / Dimension	0.126" L x 0.061" W x 0.061" H (3.20mm x 1.55mm x 1.55mm)	0.126" L x 0.061" W x 0.061" H (3.20mm x 1.55mm x 1.55mm)	0.126" L x 0.061" W x 0.061" H (3.20mm x 1.55mm x 1.55mm)	0.126" L x 0.061" W x 0.061" H (3.20mm x 1.55mm x 1.55mm)
Series	MGA-A	MGA-A	MGA	MGA
Packaging Format	Tape & Reel (TR)	Cut Tape (CT)	Strip	Tape & Reel (TR)
Approval Agency	cURus, UL	cURus, UL	cURus	cURus
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Replacement (3-103-111): This part is a parametric equivalent with identical electrical and mechanical specifications. Selection is appropriate when packaging format change from Tape & Reel to Cut Tape is acceptable for procurement or assembly processes. Both parts carry cURus and UL approvals.

Upgrade Selection (3410.0033.01): This part maintains the 1.5 A current rating and all electrical parameters while offering extended operating temperature range (-55°C ~ 150°C vs. -55°C ~ 125°C). Selection is appropriate for applications requiring higher temperature performance. Packaging format is Strip. Approval agency is cURus only.

Downgrade Selection (3410.0031.03): This part reduces current rating to 1 A and is suitable only for circuits designed for 1 A protection. Extended operating temperature range (-55°C ~ 150°C) is provided. Selection requires circuit redesign verification. Approval agency is cURus only.

All substitute parts maintain ROHS3 compliance, identical physical dimensions, and Active product status.

Frequently Asked Questions (FAQ)

Q: Can 3-103-111 be used as a direct replacement for 3-103-110?

A: Yes. Both parts share identical electrical ratings (1.5 A, 125 V AC/DC), response time (fast blow), package type (2-SMD square end block), and physical dimensions. The only difference is packaging format (Cut Tape vs. Tape & Reel). Both carry cURus and UL approvals.

Q: What is the difference between 3410.0033.01 and 3-103-110?

A: Electrical ratings and package dimensions are identical. Differences include: series designation (MGA vs. MGA-A), packaging format (Strip vs. Tape & Reel), operating temperature range (150°C vs. 125°C maximum), melting I²t specification (0.064 vs. 0.014), and approval agency (cURus only vs. cURus and UL).

Q: Can 3410.0031.03 replace 3-103-110?

A: No. The current rating differs (1 A vs. 1.5 A). This part is suitable only for circuits designed for 1 A protection. Circuit redesign and verification are required before substitution.

Q: Are all substitute parts RoHS compliant?

A: Yes. All parts listed are ROHS3 compliant.

Q: What packaging formats are available?

A: The 3-103-110 is supplied in Tape & Reel format. Equivalent packaging options include Cut Tape (3-103-111) and Strip (3410.0033.01).

Q: Do all parts have the same approval certifications?

A: No. The 3-103-110 and 3-103-111 carry cURus and UL approvals. The 3410.0033.01 and 3410.0031.03 carry cURus approval only.

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