AP9101CK-AETRG1 Equivalent & Substitute Parts

Part Overview

The AP9101CK-AETRG1 is a Battery Protection IC for single-cell Lithium Ion/Polymer applications, manufactured by Diodes Incorporated. This Surface Mount device in SOT-25 packaging provides Over Current and Over Voltage fault protection. The part is currently Active in product status with full ROHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are necessary when the primary part reaches end-of-life status, inventory constraints occur, or alternative packaging formats are required for manufacturing flexibility while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Function	Battery Protection
Battery Chemistry	Lithium Ion/Polymer
Number of Cells	1
Fault Protection	Over Current, Over Voltage
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-25
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the AP9101CK-AETRG1 is determined by the following criteria:

Electrical Equivalence Requirements:

Battery Chemistry: Lithium Ion/Polymer
Number of Cells: 1
Fault Protection: Over Current, Over Voltage (minimum)
Operating Temperature Range: -40°C ~ 85°C (TA)

Mechanical Compatibility Requirements:

Mounting Type: Surface Mount
Package / Case: SC-74A, SOT-753
Supplier Device Package: SOT-25

Compliance Requirements:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)
REACH Status: REACH Unaffected

All Diodes Incorporated AP9101 variants listed meet these criteria and are electrically and mechanically interchangeable. Packaging format variations (Tape & Reel, Cut Tape, Cut Tape & Digi-Reel) do not affect electrical performance and represent alternative supply chain options.

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Battery Chemistry	Fault Protection	Operating Temperature	Package / Case	RoHS Status	Inventory (Pcs)
AP9101CK-AETRG1	Diodes Incorporated	Active	Tape & Reel (TR)	Lithium Ion/Polymer	Over Current, Over Voltage	-40°C ~ 85°C	SC-74A, SOT-753	ROHS3 Compliant	2900
AP9101CAK-ABTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT) & Digi-Reel®	Lithium Ion/Polymer	Over Current, Over Voltage	-40°C ~ 85°C	SC-74A, SOT-753	ROHS3 Compliant	3100
AP9101CAK-AKTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT) & Digi-Reel®	Lithium Ion/Polymer	Over Current, Over Voltage	-40°C ~ 85°C	SC-74A, SOT-753	ROHS3 Compliant	8700
AP9101CAK-ANTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT)	Lithium Ion/Polymer	Over Current, Over Voltage	-40°C ~ 85°C	SC-74A, SOT-753	ROHS3 Compliant	9300
AP9101CAK-BRTRG1	Diodes Incorporated	Obsolete	Tape & Reel (TR)	Lithium Ion/Polymer	Over Current, Over Voltage	-40°C ~ 85°C	SC-74A, SOT-753	ROHS3 Compliant	3946
AP9101CAK-CPTRG1	Diodes Incorporated	Obsolete	Tape & Reel (TR)	Lithium Ion/Polymer	Over Current, Over Voltage	-40°C ~ 85°C	SC-74A, SOT-753	ROHS3 Compliant	3732
AP9101CK-AHTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT) & Digi-Reel®	Lithium Ion/Polymer	Over Current, Over Voltage	-40°C ~ 85°C	SC-74A, SOT-753	ROHS3 Compliant	14500
AP9101CK-AKTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT)	Lithium Ion/Polymer	Over Current, Over Voltage	-40°C ~ 85°C	SC-74A, SOT-753	ROHS3 Compliant	3820
AP9101CK-ASTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT)	Lithium Ion/Polymer	Over Current, Over Voltage	-40°C ~ 85°C	SC-74A, SOT-753	ROHS3 Compliant	9400
AP9101CK-AUTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT)	Lithium Ion/Polymer	Over Current, Over Voltage	-40°C ~ 85°C	SC-74A, SOT-753	ROHS3 Compliant	4300
BQ29706DSER	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	Lithium Ion/Polymer	Over Current, Over/Under Voltage, Short Circuit	-40°C ~ 85°C	6-WFDFN	ROHS3 Compliant	61600

Engineering Selection Recommendations

Primary Substitutes (Diodes Incorporated AP9101 Series):

All AP9101 variants from Diodes Incorporated are direct electrical and mechanical equivalents. Selection among these parts should be based on packaging format availability and supply chain requirements:

Tape & Reel (TR) Format: AP9101CK-AETRG1 (Active), AP9101CAK-BRTRG1 (Obsolete), AP9101CAK-CPTRG1 (Obsolete)
Cut Tape (CT) Format: AP9101CAK-ANTRG1 (Obsolete), AP9101CK-AKTRG1(CT) (Obsolete), AP9101CK-ASTRG1 (Obsolete), AP9101CK-AUTRG1 (Obsolete)
Cut Tape & Digi-Reel® Format: AP9101CAK-ABTRG1 (Obsolete), AP9101CAK-AKTRG1(CT&DR) (Obsolete), AP9101CK-AHTRG1 (Obsolete)

The AP9101CK-AETRG1 is the only Active status part in this family and is the preferred selection for new designs.

Alternative Manufacturer Substitute (Texas Instruments):

The BQ29706DSER from Texas Instruments is electrically compatible with enhanced fault protection capabilities (includes Short Circuit protection in addition to Over Current and Over Voltage). However, this part uses a different package format (6-WFDFN vs. SOT-25), requiring PCB layout modifications. This substitute is suitable only when design flexibility permits package change and the enhanced protection features are beneficial.

Frequently Asked Questions (FAQ)

Q: Can I use AP9101CAK-ABTRG1 as a direct replacement for AP9101CK-AETRG1?

A: Yes. Both parts are electrically and mechanically equivalent. The difference is packaging format: AP9101CK-AETRG1 is supplied in Tape & Reel format, while AP9101CAK-ABTRG1 is supplied in Cut Tape & Digi-Reel format. The functional performance is identical. Note that AP9101CAK-ABTRG1 has Obsolete product status.

Q: What is the difference between the various AP9101 part numbers?

A: The AP9101 base part number remains constant across all variants. The suffix characters indicate packaging format and supplier configuration. All variants maintain identical electrical specifications, operating temperature range, fault protection features, and SOT-25 package dimensions.

Q: Is BQ29706DSER a suitable replacement for AP9101CK-AETRG1?

A: BQ29706DSER is electrically compatible for single-cell Lithium Ion/Polymer battery protection applications. However, it uses a 6-WFDFN package instead of SOT-25, requiring PCB redesign. BQ29706DSER provides additional Short Circuit protection. Use this substitute only when PCB layout modifications are feasible and enhanced protection is required.

Q: Why are most AP9101 variants marked as Obsolete?

A: Only AP9101CK-AETRG1 maintains Active product status. Obsolete variants remain electrically and mechanically equivalent but are no longer in active production. For new designs, AP9101CK-AETRG1 is the recommended selection. Existing inventory of obsolete variants can be used as substitutes in current production if supply constraints require it.

Q: Do all substitutes meet the same compliance requirements?

A: Yes. All listed substitutes are ROHS3 Compliant, REACH Unaffected, and carry Moisture Sensitivity Level 1 (Unlimited). Compliance certifications are identical across all Diodes Incorporated AP9101 variants and the Texas Instruments BQ29706DSER.

Q: What packaging formats are available?

A: Three packaging formats are available: Tape & Reel (TR), Cut Tape (CT), and Cut Tape & Digi-Reel. All formats contain the same SOT-25 component and are suitable for automated assembly. Selection depends on manufacturing equipment compatibility and supply chain preferences.

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