2STW4468 Equivalent & Substitute Parts

Part Overview

The 2STW4468 is an NPN bipolar junction transistor manufactured by STMicroelectronics, designed for high-voltage, high-current switching applications. This device features a 140 V collector-emitter breakdown voltage rating and 10 A maximum collector current capability in a TO-247-3 through-hole package. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	140	V
Current - Collector (Ic) (Max)	10	A
Power - Max	100	W
Frequency - Transition	20	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	70 @ 3A, 4V	—
Vce Saturation (Max) @ Ib, Ic	700mV @ 700mA, 7A	—
Current - Collector Cutoff (Max)	100	nA
Operating Temperature (TJ)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-247-3	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 2STW4468 is determined by electrical and mechanical compatibility within the NPN bipolar transistor category. The primary substitution criteria are:

Electrical Parameters:

Transistor polarity (NPN type)
Collector-emitter breakdown voltage rating equal to or greater than 140 V
Maximum collector current rating equal to or greater than 10 A
Power dissipation capability equal to or greater than 100 W
Transition frequency equal to or greater than 20 MHz
DC current gain (hFE) characteristics suitable for the intended application

Mechanical Parameters:

Through-hole mounting configuration
Package form factor compatible with TO-247-3 footprint or equivalent high-current power transistor packages

Compliance Parameters:

RoHS compliance status
Moisture sensitivity level (MSL) rating

The TTC0002(Q) from Toshiba Semiconductor and Storage meets these substitution criteria with enhanced electrical ratings across multiple parameters.

Parameter Comparison

Parameter	2STW4468 (STMicroelectronics)	TTC0002(Q) (Toshiba)	Unit
Transistor Type	NPN	NPN	—
Voltage - Collector Emitter Breakdown (Max)	140	160	V
Current - Collector (Ic) (Max)	10	18	A
Power - Max	100	180	W
Frequency - Transition	20	30	MHz
DC Current Gain (hFE) (Min)	70 @ 3A, 4V	80 @ 1A, 5V	—
Operating Temperature (TJ)	150	150	°C
Mounting Type	Through Hole	Through Hole	—
Package / Case	TO-247-3	TO-3PL	—
RoHS Status	ROHS3 Compliant	RoHS Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	—

Engineering Selection Recommendations

2STW4468 (Obsolete): This part is classified as obsolete and no longer in active production. While 1085 units remain in current inventory, long-term procurement cannot be assured. Selection of this part is not recommended for new designs or applications requiring extended component availability.

TTC0002(Q) (Active): This Toshiba part is in active production status with 1077 units currently in inventory. The TTC0002(Q) provides superior electrical performance across all key parameters: 160 V breakdown voltage (versus 140 V), 18 A collector current (versus 10 A), 180 W power rating (versus 100 W), and 30 MHz transition frequency (versus 20 MHz). Both parts maintain identical maximum operating junction temperature (150°C) and MSL rating (1 - Unlimited). The TTC0002(Q) is RoHS compliant and suitable for applications requiring the 2STW4468 electrical specifications.

Package Consideration: The TTC0002(Q) uses TO-3PL packaging versus the TO-247-3 of the 2STW4468. Both are through-hole power transistor packages; however, PCB layout modifications are required due to different pin configurations and mechanical dimensions.

Frequently Asked Questions (FAQ)

Q: Can the TTC0002(Q) directly replace the 2STW4468 without circuit modifications?

A: The TTC0002(Q) meets or exceeds all electrical specifications of the 2STW4468. However, PCB layout changes are necessary due to different package geometries (TO-3PL versus TO-247-3). Pin configuration and mounting hole spacing differ between these packages.

Q: What is the primary reason for substituting the 2STW4468?

A: The 2STW4468 is classified as obsolete. The TTC0002(Q) provides equivalent or superior electrical performance with active production status and assured long-term availability.

Q: Are there compliance differences between these parts?

A: Both parts are RoHS compliant and carry MSL rating 1 (Unlimited). The 2STW4468 is ROHS3 compliant, while the TTC0002(Q) is RoHS compliant. Both meet environmental and regulatory requirements for industrial applications.

Q: How do the electrical ratings compare?

A: The TTC0002(Q) exceeds the 2STW4468 across all electrical parameters. Breakdown voltage is 160 V versus 140 V, collector current is 18 A versus 10 A, and power dissipation is 180 W versus 100 W. These higher ratings provide design margin and are suitable for applications designed around the 2STW4468 specifications.

Q: What is the impact of different package types on circuit design?

A: TO-247-3 and TO-3PL packages have different mechanical footprints, pin spacing, and mounting configurations. PCB redesign is required to accommodate the TTC0002(Q). Thermal management characteristics may differ due to package geometry variations.

Q: Is the TTC0002(Q) suitable for high-frequency switching applications?

A: Yes. The TTC0002(Q) transition frequency of 30 MHz exceeds the 2STW4468 specification of 20 MHz, making it suitable for applications requiring the original part's frequency performance.

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