SN75240PWR Equivalent & Substitute Parts

Part Overview

The SN75240PWR is a Transient Voltage Suppressor (TVS) device manufactured by Texas Instruments, designed for circuit protection applications with a 7V clamping voltage. This mixed-technology TVS operates in Surface Mount packaging (8-TSSOP) and is optimized for USB protection. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for design continuity and long-term supply chain planning.

Substiute Parts

SN75240PWR

Texas InstrumentsIn Stock: 57473SN75240PWR Datasheet

Current PartRFQ

SN65240PWR

Texas InstrumentsIn Stock: 4781SN65240PWR Datasheet

MFR RecommendedRFQ

CM1213A-04MR

onsemiIn Stock: 16335CM1213A-04MR Datasheet

MFR RecommendedRFQ

ESDA25B1RL

STMicroelectronicsIn Stock: 40744ESDA25B1RL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN75240PWR is determined by the following critical parameters:

Primary Substitution Criteria:

• Voltage - Clamping: 7V (exact match required)
• Mounting Type: Surface Mount
• Applications: USB protection capability
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Grouping Logic:

Group 1 - Direct Manufacturer Equivalent (SN65240PWR): Identical clamping voltage (7V), same package footprint (8-TSSOP), same technology classification (Mixed Technology), same application focus (USB), and equivalent compliance certifications. This part represents the closest functional equivalent with Active product status, providing superior supply chain availability compared to the Last Time Buy status of the main part.

Group 2 - Alternative Topology (CM1213A-04MR): Operates at different voltage parameters (3.3V Reverse Standoff, 10V Clamping Max) with Steering (Rail to Rail) topology and 4 unidirectional channels. Package differs to 10-MSOP. This substitute is suitable only for applications where the higher clamping voltage and different channel configuration are acceptable within the circuit design constraints.

Group 3 - Different Voltage Class (ESDA25B1RL): Operates at significantly higher voltage parameters (24V Reverse Standoff, 25V Breakdown Min) with Zener topology and 6 bidirectional channels in 8-SOIC package. This substitute is not electrically compatible with the SN75240PWR application requirements due to voltage mismatch and is listed for reference only.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - SN65240PWR: Select SN65240PWR as the preferred substitute. This part maintains identical electrical specifications (7V clamping voltage), identical package footprint (8-TSSOP), and identical technology classification (Mixed Technology). The part carries Active product status, ensuring continued availability and supply chain stability. All compliance certifications (ROHS3, REACH Unaffected) are equivalent. No circuit redesign is required for this substitution.

Secondary Consideration - CM1213A-04MR: This part may be evaluated only if circuit design parameters permit operation at 10V clamping voltage instead of 7V. The Steering topology and 4-channel configuration differ from the original design. Package change to 10-MSOP requires PCB layout modification. Product status is Last Time Buy, offering no supply advantage. Evaluation requires full electrical compatibility verification within the specific application.

Not Recommended - ESDA25B1RL: This part operates at 24V/25V voltage class, fundamentally incompatible with the 7V specification of the SN75240PWR. Substitution would require complete circuit redesign and is not suitable for direct replacement in USB protection applications designed for the original part.

Frequently Asked Questions (FAQ)

Q: Can SN65240PWR be used as a direct drop-in replacement for SN75240PWR?

A: Yes. SN65240PWR is a direct equivalent with identical clamping voltage (7V), package (8-TSSOP), and technology (Mixed Technology). No circuit modifications are required. The part is manufactured by the same supplier (Texas Instruments) and carries Active product status.

Q: Why is CM1213A-04MR listed as a substitute if the voltage is different?

A: CM1213A-04MR is listed based on the provided input parameters but operates at 10V clamping voltage, which differs from the 7V requirement of SN75240PWR. This part is suitable only for applications where the higher clamping voltage is acceptable and the circuit design permits the different channel configuration (4 unidirectional channels vs. 1 circuit).

Q: What is the significance of the Last Time Buy status for SN75240PWR?

A: Last Time Buy status indicates that the manufacturer will discontinue production. This necessitates identifying equivalent parts for future designs and supply chain continuity. SN65240PWR, with Active status, provides a viable long-term alternative.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed (SN75240PWR, SN65240PWR, CM1213A-04MR, and ESDA25B1RL) carry ROHS3 Compliant certification and REACH Unaffected status, meeting current environmental and regulatory requirements.

Q: Does package change affect PCB compatibility?

A: Yes. SN75240PWR and SN65240PWR both use 8-TSSOP packaging and are footprint-compatible. CM1213A-04MR uses 10-MSOP packaging, requiring PCB layout modification. ESDA25B1RL uses 8-SOIC packaging, also requiring layout changes. Verify PCB design constraints before selecting alternatives with different packages.

Q: What is the Moisture Sensitivity Level (MSL) significance?

A: All listed parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage, handling, or assembly. This provides equivalent reliability characteristics across all substitute options.