RSA5LATR Equivalent & Substitute Parts

Part Overview

The RSA5LATR is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Rohm Semiconductor, designed for surface mount applications in the DO-214AC/SMA package. This component provides transient overvoltage protection with a 5.8V reverse standoff voltage and 10.5V maximum clamping voltage at peak pulse current of 57A.

The RSA5LATR is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing production requirements, maintenance operations, and system redesigns where this component is specified in existing designs.

Substiute Parts

RSA5LATR

Rohm SemiconductorIn Stock: 853RSA5LATR Datasheet

Current PartRFQ

VS5V0UA1LAMTR

Rohm SemiconductorIn Stock: 3653VS5V0UA1LAMTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RSA5LATR is determined by equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff: 5.0V to 5.8V range
• Voltage - Clamping (Max) @ Ipp: 10.5V
• Current - Peak Pulse (10/1000µs): 57A minimum
• Power - Peak Pulse: 600W minimum
• Operating Temperature: 150°C (TJ) minimum

Mechanical Equivalence Criteria:

• Type: Zener diode
• Unidirectional Channels: 1
• Mounting Type: Surface Mount
• RoHS3 Compliance
• MSL Rating: 1 (Unlimited)

The VS5V0UA1LAMTR meets all electrical performance requirements and compliance standards. The primary difference is the package configuration and product status transition from obsolete to active production.

Parameter Comparison

Engineering Selection Recommendations

VS5V0UA1LAMTR as Primary Substitute:

The VS5V0UA1LAMTR is the recommended substitute for the obsolete RSA5LATR. Both components are manufactured by Rohm Semiconductor and share identical electrical performance specifications across all critical transient suppression parameters: 10.5V clamping voltage, 57A peak pulse current, and 600W peak pulse power rating.

Both parts maintain ROHS3 compliance and carry identical ECCN and HTSUS classifications, ensuring regulatory and trade compliance equivalence. The VS5V0UA1LAMTR holds active product status with significantly higher inventory availability (3591 units in stock versus 750 units for the obsolete RSA5LATR).

Package Consideration:

The primary distinction between these parts is the package configuration. The RSA5LATR uses DO-214AC/SMA packaging (PMDS supplier device package), while the VS5V0UA1LAMTR uses SOD-128 packaging (PMDTM supplier device package). PCB layout modifications are required to accommodate the different package footprints. Both packages are standard surface mount configurations suitable for automated assembly processes.

Voltage Rating Difference:

The VS5V0UA1LAMTR specifies a 5V reverse standoff voltage compared to the RSA5LATR's 5.8V rating. Both components share the identical 6.45V minimum breakdown voltage and 10.5V maximum clamping voltage. This 0.8V difference in standoff voltage does not affect the clamping performance or peak pulse current handling capability.

Frequently Asked Questions (FAQ)

Q: Can the VS5V0UA1LAMTR directly replace the RSA5LATR without circuit modifications?

A: The VS5V0UA1LAMTR provides equivalent electrical performance for transient suppression. However, the different package footprints (DO-214AC/SMA versus SOD-128) require PCB layout changes. Circuit functionality remains unchanged.

Q: What is the significance of the 0.8V difference in reverse standoff voltage?

A: The reverse standoff voltage indicates the maximum voltage at which the TVS diode remains in its off-state. Both parts share identical breakdown (6.45V minimum) and clamping (10.5V maximum) voltages. The standoff voltage difference does not affect protection performance in typical applications.

Q: Are both parts suitable for automotive applications?

A: The RSA5LATR carries an automotive grade designation. The VS5V0UA1LAMTR is classified for general purpose applications. Both parts meet ROHS3 compliance and carry identical regulatory classifications (EAR99, HTSUS 8541.10.0080).

Q: What are the packaging differences between these parts?

A: The RSA5LATR uses DO-214AC/SMA package (PMDS), while the VS5V0UA1LAMTR uses SOD-128 package (PMDTM). Both are surface mount packages. The SOD-128 package is smaller and more compact than the DO-214AC/SMA package.

Q: Why is the VS5V0UA1LAMTR recommended despite the obsolete status of the RSA5LATR?

A: The VS5V0UA1LAMTR is in active production with substantially higher inventory availability. It provides identical electrical performance for transient voltage suppression while maintaining all required compliance certifications. The active product status ensures long-term supply chain reliability.

Q: Are moisture sensitivity levels equivalent between these parts?

A: Both parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions. Storage and handling requirements are identical.