SP1220-01ETG Equivalent & Substitute Parts

Part Overview

The SP1220-01ETG is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for surface mount applications in SOD-882 packaging. This component provides transient voltage protection with a 5.75V reverse standoff voltage and 11V clamping voltage at peak pulse current. The part is classified as Obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility for new designs and production continuity.

Substiute Parts

SP1220-01ETG

Littelfuse Inc.In Stock: 49769SP1220-01ETG Datasheet

Current PartRFQ

SP1250-01ETG

Littelfuse Inc.In Stock: 55365SP1250-01ETG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SP1250-01ETG qualifies as a manufacturer-recommended substitute for the SP1220-01ETG based on the following substitution criteria:

Electrical Compatibility Parameters:

• Both devices maintain identical reverse standoff voltage classification (5V-5.75V range)
• Both operate within the same clamping voltage envelope (10V-11V @ Ipp)
• Both are unidirectional Zener-type TVS diodes with single channel configuration
• Both support the same operating temperature range (-40°C ~ 125°C)

Mechanical & Package Compatibility:

• Identical SOD-882 surface mount package
• Same mounting type and footprint compatibility
• Identical MSL rating (1 - Unlimited)

Compliance & Certification:

• Both maintain Automotive grade classification
• Both are ROHS3 compliant
• Both carry AEC-Q101 qualification

Functional Differences: The SP1250-01ETG provides enhanced peak pulse current capability (50A vs. 20A at 8/20µs), lower capacitance (118pF vs. 290pF @ 1MHz), and Active product status, making it suitable for applications requiring higher transient current handling or lower parasitic capacitance.

Parameter Comparison

Engineering Selection Recommendations

The SP1250-01ETG is the manufacturer-recommended substitute for the SP1220-01ETG. Selection is based on the following engineering criteria:

Product Status: The SP1220-01ETG is classified as Obsolete, while the SP1250-01ETG maintains Active status, ensuring long-term availability and continued manufacturing support.

Compliance & Certification: Both devices maintain identical Automotive grade classification and AEC-Q101 qualification, satisfying automotive application requirements. Both are ROHS3 compliant with MSL 1 rating.

Electrical Parameters: The SP1250-01ETG operates within compatible voltage ranges (5V reverse standoff, 10V clamping) relative to the SP1220-01ETG (5.75V reverse standoff, 11V clamping). The lower clamping voltage of the substitute provides equivalent or improved transient suppression performance.

Package Compatibility: Identical SOD-882 surface mount packaging ensures direct footprint compatibility without PCB redesign.

Enhanced Performance: The SP1250-01ETG provides superior peak pulse current handling (50A vs. 20A) and reduced parasitic capacitance (118pF vs. 290pF), offering performance advantages for high-speed or high-current transient protection applications.

Frequently Asked Questions (FAQ)

Q: Can the SP1250-01ETG be used as a direct replacement for the SP1220-01ETG?

A: Yes. Both devices share identical package geometry (SOD-882), mounting type (surface mount), and electrical classification (unidirectional Zener TVS). The SP1250-01ETG operates within compatible voltage ranges and maintains equivalent automotive qualification and compliance certifications.

Q: What are the key electrical differences between these parts?

A: The SP1250-01ETG has a lower reverse standoff voltage (5V vs. 5.75V) and lower clamping voltage (10V vs. 11V), but provides higher peak pulse current capability (50A vs. 20A) and significantly lower capacitance (118pF vs. 290pF @ 1MHz). These differences make the substitute suitable for applications requiring higher transient current handling or lower parasitic effects.

Q: Are there any temperature or environmental limitations?

A: Both devices operate identically across the temperature range of -40°C to 125°C (TA) and maintain MSL 1 (Unlimited) moisture sensitivity rating, indicating no special storage or handling requirements.

Q: Does the SP1250-01ETG require any circuit modifications?

A: No circuit modifications are required. The substitute maintains identical package footprint, pin configuration, and functional behavior within the specified electrical parameter ranges.

Q: What is the availability status of each part?

A: The SP1220-01ETG is Obsolete with 49,744 pieces in current inventory. The SP1250-01ETG is Active with 55,300 pieces in inventory, ensuring continued supply for new designs and production requirements.

Q: Are both parts suitable for automotive applications?

A: Yes. Both devices carry Automotive grade classification and AEC-Q101 qualification, meeting automotive industry standards for transient voltage suppression.