SP3012-04HTG Equivalent & Substitute Parts

Part Overview

The SP3012-04HTG is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for power line protection applications. This steering TVS diode features a 5V reverse standoff voltage and 7V typical clamping voltage with 4A peak pulse current capability in a surface mount SOT-23-6 package. The product is currently obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

SP3012-04HTG

Littelfuse Inc.In Stock: 976SP3012-04HTG Datasheet

Current PartRFQ

SP3019-04HTG

Littelfuse Inc.In Stock: 7999SP3019-04HTG Datasheet

MFR RecommendedRFQ

SZCM1213A-04SO

onsemiIn Stock: 3079SZCM1213A-04SO Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SP3012-04HTG is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Reverse standoff voltage: 5V maximum
• Steering (Rail to Rail) TVS diode configuration with 4 unidirectional channels
• Power line protection capability
• Surface mount technology with SOT-23-6 or compatible package footprint

Mechanical Compatibility Criteria:

• Package type: SOT-23-6 or equivalent surface mount package
• Mounting type: Surface mount
• RoHS3 compliance

The substitute parts identified maintain the core functional characteristics of the original component while offering active product status and improved availability. Electrical parameters such as clamping voltage and peak pulse current may vary within acceptable ranges for the application category.

Parameter Comparison

Engineering Selection Recommendations

SP3019-04HTG (Littelfuse Inc.): This substitute maintains the same reverse standoff voltage (5V maximum) and identical package footprint (SOT-23-6) as the original SP3012-04HTG. The part is active in production with ROHS3 compliance and AEC-Q101 automotive qualification. The higher clamping voltage (11.5V typical) and reduced peak pulse current (2.5A) represent the primary electrical differences. This part is recommended for applications where the original SOT-23-6 footprint must be preserved and Littelfuse sourcing is preferred.

SZCM1213A-04SO (onsemi): This substitute is manufactured by onsemi and features active product status with ROHS3 compliance and AEC-Q101 automotive qualification. The reverse standoff voltage is 3.3V, which differs from the original 5V specification. The package is SC-74 (SOT-457), requiring PCB layout modification. The peak pulse current is reduced to 1A. This part is suitable only for applications where the lower voltage rating and reduced current handling are acceptable, and where package footprint changes can be accommodated.

Frequently Asked Questions (FAQ)

Q: Can SP3019-04HTG be used as a direct replacement for SP3012-04HTG?

A: SP3019-04HTG maintains the same reverse standoff voltage (5V maximum) and identical SOT-23-6 package footprint, enabling direct PCB replacement. However, the clamping voltage increases from 7V to 11.5V typical, and peak pulse current decreases from 4A to 2.5A. Verify that your circuit design tolerates these electrical parameter changes before implementation.

Q: What are the package differences between the substitute parts?

A: SP3019-04HTG uses the same SOT-23-6 package as the original SP3012-04HTG, allowing direct footprint compatibility. SZCM1213A-04SO uses SC-74 (SOT-457) package, which requires PCB layout modification and cannot be used as a direct footprint replacement.

Q: Is SZCM1213A-04SO suitable for 5V standoff voltage applications?

A: No. SZCM1213A-04SO has a reverse standoff voltage of 3.3V, which is lower than the original 5V specification. This part is only suitable for applications designed for 3.3V standoff voltage protection.

Q: What compliance certifications do the substitute parts carry?

A: Both SP3019-04HTG and SZCM1213A-04SO are ROHS3 compliant and carry AEC-Q101 automotive qualification. Both parts have unlimited moisture sensitivity level (MSL 1).

Q: Why is the original SP3012-04HTG obsolete?

A: The SP3012-04HTG is listed as obsolete by Littelfuse Inc. Substitute parts SP3019-04HTG and SZCM1213A-04SO are active products with current manufacturing support and improved availability.