2N6520BU Equivalent & Substitute Parts

Part Overview

The 2N6520BU is a PNP bipolar junction transistor (BJT) rated for 350 V collector-emitter breakdown voltage and 500 mA maximum collector current. This component is packaged in a TO-92-3 through-hole configuration and is designed for general-purpose switching and amplification applications. The 2N6520BU carries an obsolete product status, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Transistor Type	PNP
Current - Collector (Ic) (Max)	500 mA
Voltage - Collector Emitter Breakdown (Max)	350 V
Vce Saturation (Max) @ Ib, Ic	1 V @ 5 mA, 50 mA
Current - Collector Cutoff (Max)	50 nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	20 @ 50 mA, 10 V
Power - Max	625 mW
Frequency - Transition	200 MHz
Operating Temperature (TJ)	150°C
Mounting Type	Through Hole
Package / Case	TO-92-3 (TO-226AA)

Substitute Part Grouping Explanation

Substitution of the 2N6520BU is determined by electrical and mechanical parameter equivalence. The following criteria establish valid substitution:

Electrical Parameters (Must Match):

Transistor polarity: PNP
Maximum collector current: 500 mA
Maximum collector-emitter breakdown voltage: 350 V
Saturation voltage: 1 V @ 5 mA, 50 mA
Collector cutoff current: 50 nA (ICBO)
Minimum DC current gain: 20 @ 50 mA, 10 V
Maximum power dissipation: 625 mW
Transition frequency: 200 MHz
Maximum operating temperature: 150°C

Mechanical Parameters (Must Match):

Mounting type: Through Hole
Package designation: TO-92-3 (TO-226AA)

The 2N6520TA meets all specified electrical and mechanical parameters and is classified as an active product, providing a direct functional equivalent for the obsolete 2N6520BU.

Parameter Comparison

Parameter	2N6520BU	2N6520TA
Manufacturer	onsemi	onsemi
Transistor Type	PNP	PNP
Current - Collector (Ic) (Max)	500 mA	500 mA
Voltage - Collector Emitter Breakdown (Max)	350 V	350 V
Vce Saturation (Max) @ Ib, Ic	1 V @ 5 mA, 50 mA	1 V @ 5 mA, 50 mA
Current - Collector Cutoff (Max)	50 nA (ICBO)	50 nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	20 @ 50 mA, 10 V	20 @ 50 mA, 10 V
Power - Max	625 mW	625 mW
Frequency - Transition	200 MHz	200 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) Formed Leads
Product Status	Obsolete	Active
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99

Engineering Selection Recommendations

The 2N6520TA is the direct equivalent for the obsolete 2N6520BU. Both components are manufactured by onsemi and share identical electrical specifications across all critical parameters: collector current, breakdown voltage, saturation characteristics, current gain, power rating, and frequency response.

The 2N6520TA carries an active product status, ensuring ongoing availability and manufacturing support. Both parts maintain REACH Unaffected status and EAR99 export classification. The 2N6520TA is RoHS3 compliant, providing enhanced environmental and regulatory alignment for new designs.

The primary distinction between the two parts is packaging format: the 2N6520BU is supplied in standard TO-92-3 configuration, while the 2N6520TA features formed leads in cut tape packaging. This packaging difference does not affect electrical performance or mechanical compatibility in through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can the 2N6520TA directly replace the 2N6520BU in existing designs?

A: Yes. The 2N6520TA is electrically and mechanically equivalent to the 2N6520BU. Both components share identical electrical specifications and are packaged in the TO-92-3 through-hole configuration. The formed leads on the 2N6520TA do not affect compatibility with standard through-hole PCB layouts.

Q: What is the significance of the 2N6520BU being obsolete?

A: Obsolete status indicates that the 2N6520BU is no longer manufactured by onsemi. The 2N6520TA, classified as an active product, is the current manufacturing equivalent and is recommended for all new designs and ongoing procurement requirements.

Q: Are there differences in compliance or certification between these parts?

A: Both parts maintain REACH Unaffected status and EAR99 export classification. The 2N6520TA includes RoHS3 compliance certification, which the 2N6520BU does not specify. For applications requiring RoHS3 compliance, the 2N6520TA is the appropriate selection.

Q: What does "formed leads" mean on the 2N6520TA?

A: Formed leads indicate that the component leads have been shaped or bent during manufacturing, typically for automated insertion into cut tape packaging. This does not affect electrical performance or through-hole mounting compatibility.

Q: Are the electrical parameters identical between 2N6520BU and 2N6520TA?

A: Yes. Both components are specified with identical maximum collector current (500 mA), breakdown voltage (350 V), saturation voltage (1 V @ 5 mA, 50 mA), collector cutoff current (50 nA), DC current gain (20 @ 50 mA, 10 V), power dissipation (625 mW), transition frequency (200 MHz), and operating temperature (150°C).

Q: What packaging options are available for the 2N6520 series?

A: The 2N6520BU is supplied in standard TO-92-3 through-hole packaging. The 2N6520TA is supplied in cut tape (CT) format with formed leads, also in TO-92-3 configuration. Both maintain the same physical footprint and through-hole compatibility.

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