S-8261AASMD-G2ST2G Equivalent & Substitute Parts

Part Overview

The S-8261AASMD-G2ST2G is a single-cell lithium ion/polymer battery protection IC manufactured by ABLIC Inc. in SOT-23-6 surface mount packaging. This active product provides over-current and short-circuit fault protection for single-cell battery applications. Substitute parts are necessary when the primary part number is unavailable, when alternative packaging formats are required, or when sourcing from different manufacturers is preferred while maintaining equivalent electrical and mechanical functionality.

Substiute Parts

S-8261AASMD-G2ST2G

ABLIC Inc.In Stock: 3761S-8261AASMD-G2ST2G Datasheet

Current PartRFQ

S-8240ACS-M6T1U

ABLIC Inc.In Stock: 1153S-8240ACS-M6T1U Datasheet

Parametric EquivalentRFQ

S-8240ADZ-M6T1U

ABLIC Inc.In Stock: 891S-8240ADZ-M6T1U Datasheet

Parametric EquivalentRFQ

S-8261AAJMD-G2JT2G

ABLIC Inc.In Stock: 13769S-8261AAJMD-G2JT2G Datasheet

Parametric EquivalentRFQ

S-8261AAJMD-G2JT2U

ABLIC Inc.In Stock: 3845S-8261AAJMD-G2JT2U Datasheet

Parametric EquivalentRFQ

BQ29729DSER

Texas InstrumentsIn Stock: 6433BQ29729DSER Datasheet

SimilarRFQ

BQ29733DSET

Texas InstrumentsIn Stock: 6080BQ29733DSET Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the S-8261AASMD-G2ST2G is determined by the following critical parameters:

Primary Substitution Criteria:

• Battery Chemistry: Lithium Ion/Polymer
• Number of Cells: 1
• Fault Protection: Over Current, Short Circuit
• Package / Case: SOT-23-6
• Operating Temperature: -40°C ~ 85°C (TA)
• Mounting Type: Surface Mount
• Product Status: Active
• RoHS Status: ROHS3 Compliant

Packaging Variants: The main part is supplied in Tape & Reel (TR) format. Parametric equivalents include Cut Tape (CT) variants of the same base product number (S-8261AAJMD-G2JT2G) and alternative ABLIC series parts (S-8240ACS-M6T1U, S-8240ADZ-M6T1U) that maintain identical electrical specifications and SOT-23-6 packaging.

Cross-Manufacturer Alternatives: Texas Instruments BQ29729DSER and BQ29733DSET provide similar battery protection functionality for single-cell lithium ion/polymer applications. These parts differ in package designation (6-WSON vs. SOT-23-6) but maintain equivalent electrical performance and operating temperature ranges. Both include additional over/under voltage protection beyond the base specification.

Parameter Comparison

Engineering Selection Recommendations

ABLIC Series Substitutes (S-8261 and S-8240 variants): These parts maintain identical electrical specifications and SOT-23-6 packaging. Selection between S-8261AAJMD-G2JT2G (Cut Tape) and S-8261AAJMD-G2JT2U (Tape & Reel) depends on assembly process requirements. The S-8240 series (S-8240ACS-M6T1U and S-8240ADZ-M6T1U) provides equivalent functionality with different internal configurations but identical external performance characteristics. All ABLIC variants are ROHS3 compliant with MSL 1 rating and active product status.

Texas Instruments Cross-Manufacturer Alternatives (BQ29729DSER, BQ29733DSET): These parts provide single-cell lithium ion/polymer battery protection with extended fault detection including over/under voltage protection. The 6-WSON package differs from SOT-23-6 in physical dimensions and pin configuration, requiring PCB layout modification. Both maintain -40°C to 85°C operating temperature range, ROHS3 compliance, and active product status. Selection of BQ29729DSER (Cut Tape & Digi-Reel) or BQ29733DSET (Tape & Reel) depends on packaging format preference.

Frequently Asked Questions (FAQ)

Q: Can S-8261AAJMD-G2JT2G (Cut Tape) be used as a direct replacement for S-8261AASMD-G2ST2G (Tape & Reel)?

A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format: Cut Tape is supplied in individual strips for manual or semi-automated assembly, while Tape & Reel is supplied on continuous reels for automated pick-and-place equipment. PCB design and electrical performance are unchanged.

Q: What is the difference between S-8261 and S-8240 series parts?

A: Both series provide single-cell lithium ion/polymer battery protection with identical fault detection (over-current and short-circuit), operating temperature range (-40°C to 85°C), and SOT-23-6 packaging. The S-8240 series represents an alternative product line from ABLIC with equivalent external specifications. Internal circuit topology may differ, but electrical performance at the application interface is equivalent.

Q: Can Texas Instruments BQ29729DSER or BQ29733DSET replace the ABLIC S-8261AASMD-G2ST2G?

A: Electrical substitution is possible. Both BQ parts provide single-cell lithium ion/polymer battery protection with -40°C to 85°C operating temperature and ROHS3 compliance. However, the 6-WSON package differs from SOT-23-6 in pin count, physical dimensions, and pinout. PCB redesign is required. BQ parts include additional over/under voltage protection not present in the base S-8261 specification.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates the component has unlimited shelf life under standard storage conditions (typically 30°C/85% RH). No special moisture control or baking procedures are required before assembly.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All parts listed—S-8261 variants, S-8240 variants, BQ29729DSER, and BQ29733DSET—are ROHS3 compliant and REACH unaffected.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape is supplied in individual strips, typically 2-5 inches long, suitable for manual assembly or low-volume production. Tape & Reel is supplied on continuous 13-inch or 15-inch reels with 500-2000 parts per reel, optimized for automated assembly lines. Electrical and mechanical specifications are identical; packaging format selection depends on assembly process capability.