STA508 Equivalent & Substitute Parts

Part Overview

The STA508 is a Class D audio amplifier integrated circuit manufactured by STMicroelectronics, designed for mono or stereo audio applications. This device delivers 160W output power in single-channel configuration at 8Ω load impedance, or 80W per channel in dual-channel stereo configuration at 4Ω load impedance. The amplifier operates across a supply voltage range of 10V to 36V and includes integrated digital inputs, short-circuit protection, thermal protection, and standby functionality.

The STA508 carries an obsolete product status, indicating that STMicroelectronics has discontinued active manufacturing and support for this part number. Identifying equivalent and substitute components is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications currently utilizing this amplifier IC.

Substiute Parts

STA508

STMicroelectronicsIn Stock: 16742STA508 Datasheet

Current PartRFQ

STA50813TR

STMicroelectronicsIn Stock: 15588STA50813TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STA508 is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Output power ratings (160W mono at 8Ω and 80W stereo at 4Ω), supply voltage range (10V to 36V), amplifier topology (Class D), and output channel configuration (mono/stereo capability) must remain identical.

Functional Features: Digital input capability, short-circuit protection, thermal protection, and standby mode functionality must be present in substitute components.

Physical and Environmental Specifications: Package type (PowerSO-36 Exposed Top Pad), surface mount mounting type, operating temperature range (-40°C to 90°C), and moisture sensitivity level (MSL 3) must match exactly.

Compliance and Regulatory Status: RoHS3 compliance, REACH unaffected status, and equivalent ECCN and HTSUS classifications must be maintained.

Substitute parts are identified based on these parameters alone. Packaging format (bulk versus tape and reel) represents a non-functional variation that does not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The STA50813TR serves as a direct functional equivalent to the STA508. All electrical specifications, protection features, operating parameters, and compliance certifications are identical between the two part numbers. The primary distinction is product status: the STA508 is obsolete while the STA50813TR maintains active status with STMicroelectronics.

For new designs or ongoing production requiring Class D amplifier functionality with 160W mono or 80W stereo output capability, the STA50813TR is the appropriate selection. This part number ensures continued access to supply, ongoing manufacturer support, and compliance with current regulatory requirements.

The STA50813TR is available in tape and reel packaging format, which is standard for high-volume manufacturing environments. Organizations currently using bulk-packaged STA508 components can transition to the STA50813TR without modification to circuit design, PCB layout, or thermal management strategies, as the PowerSO-36 package geometry and electrical interface remain unchanged.

Frequently Asked Questions (FAQ)

Q: Can the STA50813TR be used as a direct replacement for the STA508 in existing designs?

A: Yes. The STA50813TR is electrically and mechanically equivalent to the STA508. All output power ratings, supply voltage specifications, operating temperature ranges, protection features, and package dimensions are identical. No circuit modifications or PCB redesign is required.

Q: What is the difference between STA508 and STA50813TR?

A: The STA508 and STA50813TR are functionally identical Class D amplifier ICs with matching electrical specifications. The STA508 is obsolete, while the STA50813TR is an active product. The STA50813TR is supplied in tape and reel packaging format, whereas the STA508 was available in bulk packaging. Both use the PowerSO-36 Exposed Top Pad package.

Q: Are there any thermal management differences between these parts?

A: No. Both the STA508 and STA50813TR operate across the same temperature range (-40°C to 90°C) and share identical thermal protection mechanisms. Thermal design considerations, heat sink requirements, and PCB thermal layout remain unchanged when substituting between these parts.

Q: Does the tape and reel packaging of the STA50813TR affect compatibility?

A: No. Tape and reel packaging is a supply format variation that does not affect the electrical performance or physical dimensions of the component itself. The actual IC package (PowerSO-36 Exposed Top Pad) is identical. Tape and reel format is standard for automated assembly processes.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the STA508 and STA50813TR are ROHS3 compliant and REACH unaffected. Regulatory compliance status is identical between the two part numbers.

Q: What is the moisture sensitivity level for these amplifiers?

A: Both parts carry a Moisture Sensitivity Level (MSL) rating of 3, with a floor life of 168 hours. Standard moisture control procedures during storage, handling, and assembly apply to both components equally.

Q: Can the STA50813TR handle the same output power levels as the STA508?

A: Yes. The STA50813TR delivers identical output power specifications: 160W in mono configuration at 8Ω load impedance, and 80W per channel in stereo configuration at 4Ω load impedance. Supply voltage range (10V to 36V) is also identical.