BC560ATA Equivalent & Substitute Parts

Part Overview

The BC560ATA is a PNP bipolar junction transistor manufactured by onsemi, designed for small-signal switching and amplification applications. It features a maximum collector current of 100 mA, collector-emitter breakdown voltage of 45 V, and a transition frequency of 150 MHz. The device is housed in a TO-92-3 through-hole package rated for 500 mW power dissipation.

The BC560ATA is classified as obsolete. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for applications currently utilizing this component.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) (Max)	100	mA
Voltage - Collector Emitter Breakdown (Max)	45	V
Vce Saturation (Max) @ Ib, Ic	650 mV @ 5 mA, 100 mA	—
Current - Collector Cutoff (Max)	15	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	110 @ 2 mA, 5 V	—
Power - Max	500	mW
Frequency - Transition	150	MHz
Operating Temperature (TJ)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-92-3 (TO-226AA)	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BC560ATA are identified based on electrical and mechanical parameter equivalence. The following criteria determine substitution eligibility:

Electrical Parameters:

Transistor type: PNP
Maximum collector current: 100 mA
Collector-emitter breakdown voltage: 45 V
Vce saturation: 650 mV @ 5 mA, 100 mA
Collector cutoff current: 15 nA
DC current gain (hFE): 110 @ 2 mA, 5 V (minimum)
Maximum power dissipation: 500 mW
Transition frequency: 150 MHz
Operating temperature: 150 °C

Mechanical Parameters:

Mounting type: Through Hole
Package: TO-92-3 (TO-226AA) with formed leads

Parts meeting all specified electrical and mechanical parameters are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Parameter	BC560ATA (onsemi)	BC557ATA (Fairchild Semiconductor)	Match
Transistor Type	PNP	PNP	✓
Current - Collector (Ic) (Max)	100 mA	100 mA	✓
Voltage - Collector Emitter Breakdown (Max)	45 V	45 V	✓
Vce Saturation (Max) @ Ib, Ic	650 mV @ 5 mA, 100 mA	650 mV @ 5 mA, 100 mA	✓
Current - Collector Cutoff (Max)	15 nA	15 nA	✓
DC Current Gain (hFE) (Min) @ Ic, Vce	110 @ 2 mA, 5 V	110 @ 2 mA, 5 V	✓
Power - Max	500 mW	500 mW	✓
Frequency - Transition	150 MHz	150 MHz	✓
Operating Temperature (TJ)	150 °C	150 °C	✓
Mounting Type	Through Hole	Through Hole	✓
Package / Case	TO-92-3 (TO-226AA)	TO-92-3 (TO-226AA)	✓

Engineering Selection Recommendations

BC557ATA (Fairchild Semiconductor) is a direct parametric equivalent to the BC560ATA. All electrical specifications, mechanical dimensions, and package configurations are identical.

Product Status Consideration: The BC560ATA is classified as obsolete, while the BC557ATA is classified as active. Selection of the BC557ATA ensures ongoing component availability and supply chain continuity.

Compliance and Certifications: Both parts carry identical ECCN (EAR99) and HTSUS (8541.21.0075) classifications, confirming regulatory equivalence for export and trade purposes.

Inventory Availability: The BC557ATA maintains active inventory status with 779 pieces in stock, compared to the BC560ATA's obsolete status with 928 pieces remaining.

Frequently Asked Questions (FAQ)

Q: Can the BC557ATA be used as a direct replacement for the BC560ATA in existing designs?

A: Yes. The BC557ATA meets all electrical and mechanical specifications of the BC560ATA. Pin configuration, package dimensions, and electrical performance are identical, enabling direct substitution without circuit modification.

Q: Are there differences in lead forming or package handling between these parts?

A: No. Both parts use the TO-92-3 (TO-226AA) package with formed leads. Physical dimensions, lead spacing, and mounting procedures are equivalent.

Q: What is the significance of the product status difference?

A: The BC560ATA is obsolete, indicating onsemi has discontinued production. The BC557ATA is active, meaning Fairchild Semiconductor continues manufacturing. For new designs or long-term supply requirements, the BC557ATA is the appropriate selection.

Q: Are the DC current gain specifications identical?

A: Yes. Both parts specify a minimum DC current gain (hFE) of 110 at 2 mA collector current and 5 V collector-emitter voltage. Amplification characteristics are equivalent.

Q: Do these parts have the same thermal and power dissipation ratings?

A: Yes. Both parts are rated for 500 mW maximum power dissipation and 150 °C maximum junction temperature. Thermal performance and heat management requirements are identical.

Q: Is the transition frequency the same for both parts?

A: Yes. Both parts specify a transition frequency of 150 MHz, confirming equivalent high-frequency performance for switching and amplification applications.

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