PT8121A Equivalent & Substitute Parts Reference

Part Overview

The Texas Instruments PT8121A is a Non-Isolated PoL Module DC-DC Converter intended for ITE (Commercial) applications, offering one output with an adjustable voltage range of 1.3V to 3.5V and a maximum output current of 30A. It operates from a 10.8V to 13.2V input supply, with a through-hole, right-angle 31-SIP module configuration. This product, part of the Excalibur™ PT8120 series, is obsolete and no longer in active production, necessitating the identification of alternative or substitute models to support ongoing designs, maintenance, or new development that previously depended on PT8121A.

Substiute Parts

PT8121A

Texas InstrumentsIn Stock: 1164PT8121A Datasheet

Current PartRFQ

PTH08T210WAZ

Texas InstrumentsIn Stock: 2441PTH08T210WAZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for PT8121A are selected strictly based on the following primary parameters: manufacturer, type (Non-Isolated PoL Module), number of outputs (1), voltage output range, input voltage range, output current capacity, operating temperature, mounting type, and compliance/certifications. Only modules matching these critical parameters are considered valid substitutes for direct form, fit, and function compatibility within the specified application category and environmental conditions.

Key parameters for substitution:

• Type: Non-Isolated PoL Module
• Number of Outputs: 1
• Voltage - Input (Min/Max)
• Voltage - Output 1 Range
• Current - Output (Max)
• Operating Temperature Range
• Mounting Type
• RoHS/Regulatory Compliance
• ECCN
• Applications

Parameter Comparison

Engineering Selection Recommendations

Due to the obsolete status of the Texas Instruments PT8121A, alternative selections such as PTH08T210WAZ are considered based on the supplied electrical characteristics and compliance requirements. The substitute part PTH08T210WAZ is ROHS3 Compliant and maintains EAR99 classification, ensuring regulatory compatibility. Both models are suitable for ITE (Commercial) applications and operate within the same temperature range. Only inventory, compliance, and direct technical compatibility using the defined parameters are considered when selecting a substitute.

Frequently Asked Questions (FAQ)

Q: Which parameters are essential when selecting an equivalent for PT8121A?
A: Selection is based on module type (Non-Isolated PoL), input and output voltage range, maximum output current, operating temperature, mounting type, number of outputs, and regulatory compliance.

Q: How does mounting type impact the substitution of PT8121A with PTH08T210WAZ?
A: The PT8121A uses a through-hole, right-angle mounting (31-SIP Module), while PTH08T210WAZ is surface-mount (14-SMD Module). Mounting style affects mechanical compatibility and PCB layout but not electrical function within parameter limits.

Q: Are the substitute and original parts compatible in operating temperature and application?
A: Both PT8121A and PTH08T210WAZ support -40°C to 85°C operation and are intended for ITE (Commercial) uses.

Q: Is RoHS and ECCN compliance matched between the original and substitute models?
A: Both parts are ROHS3 Compliant and classified as EAR99 for export control.

Q: Does the substitute part offer the same maximum output current as PT8121A?
A: PT8121A provides up to 30A, while PTH08T210WAZ delivers up to 25A. This is a relevant parameter difference for applications requiring higher current.

Q: Can the substitute part support the input voltage range of PT8121A?
A: PTH08T210WAZ covers a broader input range (5.5V to 14V) compared to PT8121A (10.8V to 13.2V).

Q: What should be noted about the package when substituting PT8121A with PTH08T210WAZ?
A: Changes in package style (through-hole vs. surface-mount, 31-SIP vs. 14-SMD) affect physical integration and may require PCB redesign.