RT9426AWSC Equivalent & Substitute Parts

Part Overview

The RT9426AWSC is a single-cell battery fuel gauge integrated circuit manufactured by Richtek USA Inc. designed for lithium-ion and lithium-polymer battery applications. This Power Management IC operates across an industrial temperature range of -40°C to 85°C and provides real-time battery state-of-charge monitoring through an I2C interface. The device is currently in active production status and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when packaging or supply chain requirements necessitate alternative sourcing while maintaining identical electrical and mechanical specifications.

Substiute Parts

RT9426AWSC

Richtek USA Inc.In Stock: 3472RT9426AWSC Datasheet

Current PartRFQ

RT9426WSC

Richtek USA Inc.In Stock: 17262RT9426WSC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The RT9426AWSC has one identified parametric equivalent: RT9426WSC. Substitution between these parts is valid based on the following criteria:

Identical Electrical Specifications:

• Single-cell lithium-ion/polymer fuel gauge function
• I2C communication interface
• Operating temperature range: -40°C to 85°C
• Over temperature and over/under voltage fault protection
• Identical base product number (RT9426)

Identical Mechanical Specifications:

• Package type: 9-UFBGA, WLCSP
• Physical dimensions: 9-WLCSP (2.29x1.74 mm)
• Surface mount mounting type

Identical Compliance & Certifications:

• RoHS3 compliant
• MSL 1 (unlimited moisture sensitivity)
• REACH unaffected
• ECCN: EAR99
• HTSUS: 8542.39.0001

Difference in Packaging Format: The only distinction between RT9426AWSC and RT9426WSC is the supply packaging format. RT9426AWSC is supplied in Tape & Reel (TR) format, while RT9426WSC is supplied in Cut Tape (CT) and Digi-Reel® format. This difference does not affect component functionality or performance.

Parameter Comparison

Engineering Selection Recommendations

Both RT9426AWSC and RT9426WSC are active production components from Richtek USA Inc. with identical electrical and mechanical specifications. Selection between these parts should be based on supply chain and assembly process requirements:

RT9426AWSC (Tape & Reel packaging) is suitable for high-volume automated assembly operations where continuous reel feeding is standard practice.

RT9426WSC (Cut Tape & Digi-Reel® packaging) is suitable for lower-volume production runs, mixed-component assembly, or applications requiring flexible packaging formats.

Both parts meet RoHS3 compliance requirements and carry identical fault protection features (over temperature and over/under voltage monitoring). The MSL 1 rating indicates unlimited shelf life under standard storage conditions. Selection of either part does not compromise circuit performance, reliability, or regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can RT9426WSC be used as a direct replacement for RT9426AWSC in production?

A: Yes. RT9426WSC is a parametric equivalent with identical electrical specifications, operating temperature range, I2C interface, fault protection features, and physical package dimensions. The only difference is the supply packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). Substitution is valid for any application using RT9426AWSC.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on a continuous reel suitable for automated pick-and-place equipment in high-volume manufacturing. Cut Tape (CT) and Digi-Reel® packaging provides components in smaller quantities or pre-cut lengths, offering flexibility for lower-volume production or mixed-component assembly processes. Both formats contain identical components with no functional differences.

Q: Are there any thermal or electrical performance differences between RT9426AWSC and RT9426WSC?

A: No. Both parts operate across the identical temperature range (-40°C to 85°C) and provide identical fuel gauge functionality for single-cell lithium-ion/polymer batteries. Electrical performance, I2C communication protocol, and fault protection thresholds are identical.

Q: Do both parts meet the same compliance standards?

A: Yes. Both RT9426AWSC and RT9426WSC are RoHS3 compliant, carry MSL 1 rating (unlimited moisture sensitivity), are REACH unaffected, and share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Q: What is the physical package size for both parts?

A: Both parts use the 9-WLCSP (Wafer Level Chip Scale Package) with dimensions of 2.29 x 1.74 mm. This ultra-compact surface-mount package is identical for both RT9426AWSC and RT9426WSC.

Q: Can I mix RT9426AWSC and RT9426WSC in the same production batch?

A: Yes. Since both parts are parametric equivalents with identical electrical and mechanical specifications, they can be used interchangeably within the same circuit design and production batch without any functional impact.