SMFE26AH Equivalent & Substitute Parts

Part Overview

The SMFE26AH is an active Transient Voltage Suppressor (TVS) diode manufactured by Eaton - Electronics Division. This unidirectional zener diode is designed for transient overvoltage protection in surface mount applications, featuring a 26V reverse standoff voltage and 42.1V maximum clamping voltage. The device is qualified to AEC-Q101 automotive standards and complies with ROHS3 and REACH requirements. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for this active product.

Substiute Parts

SMFE26AH

Eaton - Electronics DivisionIn Stock: 1132SMFE26AH Datasheet

Current PartRFQ

SZSMF26AT1G

Littelfuse Inc.In Stock: 3989SZSMF26AT1G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMFE26AH are identified based on electrical and mechanical parameter equivalence. The following criteria determine substitution eligibility:

Electrical Parameters (Critical):

• Voltage - Reverse Standoff (Typ): 26V
• Voltage - Breakdown (Min): 28.9V
• Voltage - Clamping (Max) @ Ipp: 42.1V
• Current - Peak Pulse (10/1000µs): 4.8A
• Power - Peak Pulse: 200W
• Operating Temperature Range: -55°C to 150°C (TJ)

Mechanical Parameters (Critical):

• Package / Case: SOD-123F
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener

Compliance & Qualification (Required):

• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

The SZSMF26AT1G from Littelfuse Inc. meets all electrical, mechanical, and compliance requirements and is classified as a direct substitute for the SMFE26AH.

Parameter Comparison

Engineering Selection Recommendations

The SZSMF26AT1G (Littelfuse Inc.) is a direct electrical and mechanical equivalent to the SMFE26AH (Eaton - Electronics Division). Both devices are active products with identical electrical specifications, package form factors, and automotive-grade qualifications.

Selection Basis:

Both parts satisfy the following requirements:

• Identical voltage ratings and clamping characteristics
• Identical peak pulse current and power dissipation ratings
• Identical operating temperature range
• Identical SOD-123F surface mount package
• Both qualified to AEC-Q101 automotive standard
• Both ROHS3 compliant and REACH unaffected
• Both carry MSL 1 (Unlimited) moisture sensitivity rating

The SZSMF26AT1G may be selected as a substitute when SMFE26AH availability is constrained or when supply chain optimization requires component sourcing from multiple manufacturers. No electrical redesign or board layout modification is required for substitution.

Frequently Asked Questions (FAQ)

Q: Can the SZSMF26AT1G replace the SMFE26AH in existing designs?

A: Yes. The SZSMF26AT1G is electrically and mechanically equivalent to the SMFE26AH. All voltage ratings, current ratings, temperature ranges, and package specifications are identical. No circuit redesign is required.

Q: Are there any packaging differences between these parts?

A: Both parts use the SOD-123F surface mount package. The SMFE26AH is supplied in Tape & Reel (TR) packaging, while the SZSMF26AT1G is available in Cut Tape (CT) and Digi-Reel® formats. Both packaging formats are compatible with standard pick-and-place assembly equipment.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the SMFE26AH and SZSMF26AT1G are automotive-grade components qualified to AEC-Q101 standard. Both are ROHS3 compliant and REACH unaffected.

Q: What are the critical parameters for substitution?

A: The critical parameters that must match for substitution are: Voltage - Reverse Standoff (26V), Voltage - Breakdown (28.9V), Voltage - Clamping (42.1V), Current - Peak Pulse (4.8A), Power - Peak Pulse (200W), Operating Temperature Range (-55°C to 150°C), and Package (SOD-123F). All parameters match between these two parts.

Q: Are there any compliance or certification differences?

A: No. Both parts carry identical compliance certifications: AEC-Q101 automotive qualification, ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating.

Q: Can these parts be used interchangeably in production?

A: Yes. The SZSMF26AT1G and SMFE26AH are direct substitutes and can be used interchangeably in production without design changes, board layout modifications, or additional testing.