BD244CTU Equivalent & Substitute Parts

Part Overview

The BD244CTU is a PNP bipolar junction transistor manufactured by onsemi, rated for 100 V collector-emitter breakdown voltage and 6 A maximum collector current in a TO-220-3 through-hole package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The BD244CTU delivers 65 W maximum power dissipation and operates at junction temperatures up to 150°C.

Key Parameters

Parameter	Value
Transistor Type	PNP
Current - Collector (Ic) (Max)	6 A
Voltage - Collector Emitter Breakdown (Max)	100 V
Vce Saturation (Max)	1.5 V @ 1 A, 6 A
Current - Collector Cutoff (Max)	700 µA
DC Current Gain (hFE) (Min)	15 @ 3 A, 4 V
Power - Max	65 W
Operating Temperature	150°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3

Substitute Part Grouping Explanation

Substitution eligibility for the BD244CTU is determined by the following critical parameters:

Transistor Type: Must be PNP
Current - Collector (Ic) (Max): Must be 6 A or greater
Voltage - Collector Emitter Breakdown (Max): Must be 100 V or greater
DC Current Gain (hFE) (Min): Must be 15 @ 3 A, 4 V or greater
Current - Collector Cutoff (Max): Must be 700 µA or less
Mounting Type: Must be Through Hole
Package / Case: Must be TO-220-3 compatible

All substitute parts listed meet these electrical and mechanical requirements. Differences in product status, power rating, frequency response, and operating temperature range do not disqualify substitution when the core parameters align.

Parameter Comparison

Parameter	BD244CTU	BD244CG	TIP42CG	TIP42C-BP
Manufacturer	onsemi	onsemi	onsemi	Micro Commercial Co
Transistor Type	PNP	PNP	PNP	PNP
Current - Collector (Ic) (Max)	6 A	6 A	6 A	6 A
Voltage - Collector Emitter Breakdown (Max)	100 V	100 V	100 V	100 V
Vce Saturation (Max)	1.5 V @ 1 A, 6 A	1.5 V @ 1 A, 6 A	1.5 V @ 600 mA, 6 A	1.5 V @ 600 mA, 6 A
Current - Collector Cutoff (Max)	700 µA	700 µA	700 µA	700 µA
DC Current Gain (hFE) (Min) @ Ic, Vce	15 @ 3 A, 4 V	15 @ 3 A, 4 V	15 @ 3 A, 4 V	15 @ 3 A, 4 V
Power - Max	65 W	65 W	2 W	2 W
Frequency - Transition	Not specified	3 MHz	3 MHz	3 MHz
Operating Temperature	150°C (TJ)	-65°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)	150°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

BD244CG is the direct equivalent from onsemi's active product line. It maintains identical electrical specifications to the BD244CTU, including 65 W power rating and 1.5 V saturation voltage at 1 A, 6 A. The BD244CG is ROHS3 compliant and REACH unaffected, with active product status ensuring long-term availability and supply chain stability.

TIP42CG and TIP42C-BP are functionally compatible substitutes that meet all core electrical requirements. Both devices operate at 6 A collector current and 100 V breakdown voltage with matching DC current gain specifications. These parts are manufactured by onsemi and Micro Commercial Co respectively, both with active product status. The primary design consideration is the reduced power rating of 2 W compared to the 65 W specification of the BD244CTU. Applications requiring the full 65 W dissipation capability should prioritize BD244CG. Applications operating within 2 W power envelope can utilize TIP42CG or TIP42C-BP without electrical performance compromise.

All substitute parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the original device.

Frequently Asked Questions (FAQ)

Q: Can BD244CG directly replace BD244CTU in all applications?

A: BD244CG meets all electrical and mechanical specifications of BD244CTU. The primary difference is product status: BD244CTU is obsolete while BD244CG is active. BD244CG is the recommended direct replacement for new designs and ongoing production.

Q: What is the significance of the 65 W versus 2 W power rating difference?

A: Power rating indicates maximum continuous power dissipation capability. BD244CTU and BD244CG are rated for 65 W, while TIP42CG and TIP42C-BP are rated for 2 W. Applications dissipating more than 2 W require BD244CG. Applications operating below 2 W can use TIP42CG or TIP42C-BP without thermal limitations.

Q: Are TIP42CG and TIP42C-BP interchangeable?

A: Both devices meet identical electrical specifications and are pin-compatible in TO-220-3 packages. TIP42CG is manufactured by onsemi; TIP42C-BP is manufactured by Micro Commercial Co. Both are active products with ROHS3 compliance and REACH unaffected status. Selection between them depends on supplier availability and procurement requirements.

Q: Does the operating temperature range affect substitution suitability?

A: BD244CTU specifies 150°C maximum junction temperature. BD244CG and TIP42CG specify -65°C to 150°C operating range, providing extended low-temperature capability. TIP42C-BP specifies 150°C maximum. All devices operate within the BD244CTU's specified temperature envelope. Extended temperature range does not disqualify substitution.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. BD244CG, TIP42CG, and TIP42C-BP are all ROHS3 compliant and REACH unaffected, matching the regulatory status of BD244CTU.

Q: What is the difference between TO-220-3 and TO-220AB packaging?

A: Both are through-hole packages with three leads suitable for TO-220-3 footprints. TO-220AB is a variant designation. TIP42C-BP uses TO-220AB supplier device package while maintaining TO-220-3 case compatibility for circuit board mounting.

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