AP9101CK-AFTRG1 Equivalent & Substitute Parts

Part Overview

The AP9101CK-AFTRG1 is a battery protection IC for single-cell lithium-ion and lithium-polymer applications, manufactured by Diodes Incorporated. This Surface Mount Device (SMD) in SOT-25 packaging provides over-current and over-voltage fault protection. The part is currently in Active product status with 678 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when inventory constraints necessitate sourcing from available stock levels.

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
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-25
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the AP9101CK-AFTRG1 is determined by the following criteria:

Primary Substitution Criteria:

Identical base product number (AP9101)
Identical function (Battery Protection)
Identical battery chemistry (Lithium Ion/Polymer)
Identical number of cells (1)
Identical fault protection capabilities (Over Current, Over Voltage)
Identical package type (SOT-25 / SC-74A, SOT-753)
Identical operating temperature range (-40°C ~ 85°C)
Identical mounting type (Surface Mount)
Identical compliance certifications (ROHS3, REACH Unaffected)

Packaging Format Variations: Substitute parts within the AP9101 family differ only in packaging format (Tape & Reel, Cut Tape, or Cut Tape & Digi-Reel®), which affects handling and assembly processes but not electrical or mechanical performance.

Cross-Manufacturer Substitutes: The S-8241ABKMC-GBKT2G from ABLIC Inc. is functionally equivalent with identical electrical specifications and operating parameters. This part differs only in supplier device package designation (SOT-23-5 vs. SOT-25) and product status (Not For New Designs vs. Active/Obsolete).

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Inventory (Pcs)	Function	Battery Chemistry	Cells	Fault Protection	Package Type	Operating Temp	RoHS
AP9101CK-AFTRG1	Diodes Incorporated	Active	Tape & Reel (TR)	678	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	SOT-25	-40°C ~ 85°C	ROHS3
AP9101CAK-ABTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT) & Digi-Reel®	3100	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	SOT-25	-40°C ~ 85°C	ROHS3
AP9101CAK-AKTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT) & Digi-Reel®	8700	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	SOT-25	-40°C ~ 85°C	ROHS3
AP9101CAK-ANTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT)	9300	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	SOT-25	-40°C ~ 85°C	ROHS3
AP9101CAK-BRTRG1	Diodes Incorporated	Obsolete	Tape & Reel (TR)	3946	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	SOT-25	-40°C ~ 85°C	ROHS3
AP9101CAK-CPTRG1	Diodes Incorporated	Obsolete	Tape & Reel (TR)	3732	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	SOT-25	-40°C ~ 85°C	ROHS3
AP9101CK-AHTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT) & Digi-Reel®	14500	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	SOT-25	-40°C ~ 85°C	ROHS3
AP9101CK-AKTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT)	3820	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	SOT-25	-40°C ~ 85°C	ROHS3
AP9101CK-ASTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT)	9400	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	SOT-25	-40°C ~ 85°C	ROHS3
AP9101CK-AUTRG1	Diodes Incorporated	Obsolete	Cut Tape (CT)	4300	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	SOT-25	-40°C ~ 85°C	ROHS3
S-8241ABKMC-GBKT2G	ABLIC Inc.	Not For New Designs	Tape & Reel (TR)	5280	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	SOT-23-5	-40°C ~ 85°C	ROHS3

Engineering Selection Recommendations

Diodes Incorporated AP9101 Family (Preferred): All AP9101 variants from Diodes Incorporated maintain identical electrical and mechanical specifications. Selection among these parts should be based on packaging format availability and assembly process requirements. The AP9101CK-AFTRG1 in Tape & Reel format is suitable for automated pick-and-place assembly. Obsolete status variants remain functionally equivalent and are suitable for applications where new design qualification is not required.

Cross-Manufacturer Alternative: The S-8241ABKMC-GBKT2G from ABLIC Inc. provides functional equivalence with identical operating parameters and compliance certifications. The "Not For New Designs" status indicates this part should be reserved for legacy system support or maintenance applications. The SOT-23-5 package differs from the SOT-25 package of the primary part; PCB layout and footprint modifications are required for implementation.

Compliance Considerations: All listed parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory compatibility across substitution options.

Frequently Asked Questions (FAQ)

Q: Can AP9101 variants with different packaging formats be used interchangeably? A: Yes. All AP9101 variants share identical electrical specifications, operating temperature ranges, and fault protection capabilities. Packaging format differences (Tape & Reel, Cut Tape, Cut Tape & Digi-Reel®) affect only the handling and assembly process, not component performance or PCB integration.

Q: What is the difference between Active and Obsolete product status? A: Active status indicates the part is currently in production and recommended for new designs. Obsolete status indicates the part is no longer manufactured but remains functionally equivalent. Obsolete variants are suitable for replacement in existing applications or when new design qualification is not required.

Q: Is the S-8241ABKMC-GBKT2G a direct replacement for the AP9101CK-AFTRG1? A: The S-8241ABKMC-GBKT2G is functionally equivalent in terms of battery protection function, fault detection, and operating specifications. However, the SOT-23-5 package differs from the SOT-25 package, requiring PCB footprint and layout modifications. This part is designated "Not For New Designs" and should be used only for legacy applications.

Q: Are all listed parts ROHS3 compliant? A: Yes. All parts listed maintain ROHS3 compliance and REACH Unaffected status, meeting current environmental and regulatory requirements.

Q: What determines whether a part can substitute for the AP9101CK-AFTRG1? A: Substitution is determined by matching the base product number (AP9101), function (Battery Protection), battery chemistry (Lithium Ion/Polymer), number of cells (1), fault protection type (Over Current, Over Voltage), package type (SOT-25), operating temperature range (-40°C ~ 85°C), and compliance certifications (ROHS3, REACH Unaffected).

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