2STC5949 Equivalent & Substitute Parts

Part Overview

The 2STC5949 is an NPN bipolar junction transistor manufactured by STMicroelectronics, rated for 250 V collector-emitter breakdown voltage and 17 A maximum collector current. This device is packaged in TO-264 configuration and designed for through-hole mounting applications requiring high current switching at elevated voltages. The 2STC5949 is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	250	V
Current - Collector (Ic) (Max)	17	A
Power - Max	220	W
Frequency - Transition	25	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	80 @ 1A, 5V	—
Vce Saturation (Max) @ Ib, Ic	3V @ 800mA, 8A	—
Current - Collector Cutoff (Max)	5	µA
Operating Temperature (TJ)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-264-3, TO-264AA	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 2STC5949 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor type must be NPN
Voltage - Collector Emitter Breakdown (Max) must equal or exceed 250 V
Current - Collector (Ic) (Max) must equal or exceed 17 A
DC Current Gain (hFE) must meet or exceed 80 @ 1A, 5V
Vce Saturation characteristics must be compatible with 3V @ 800mA, 8A
Current - Collector Cutoff (Max) must not exceed 5µA

Mechanical Compatibility Criteria:

Mounting type must be Through Hole
Package / Case must be TO-264-3 or TO-264AA
Operating temperature range must support 150°C (TJ)

Compliance Requirements:

RoHS3 Compliant status required
REACH Unaffected status required

Substitute parts are classified into two categories: Direct Substitutes (meeting all electrical and mechanical parameters) and Similar Substitutes (meeting voltage and package requirements with minor parameter variations).

Parameter Comparison

Parameter	2STC5949 (Main)	2SC5200OTU (Direct)	FJL4315OTU (Direct)	MJL21194G (Similar)	MJL21196G (Similar)
Manufacturer	STMicroelectronics	onsemi	Fairchild Semiconductor	onsemi	onsemi
Product Status	Obsolete	Active	Active	Active	Active
Transistor Type	NPN	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	250 V	250 V	250 V	250 V	250 V
Current - Collector (Ic) (Max)	17 A	17 A	17 A	16 A	16 A
Power - Max	220 W	150 W	150 W	200 W	200 W
Frequency - Transition	25 MHz	30 MHz	30 MHz	4 MHz	4 MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	80 @ 1A, 5V	80 @ 1A, 5V	80 @ 1A, 5V	25 @ 8A, 5V	25 @ 8A, 5V
Vce Saturation (Max) @ Ib, Ic	3V @ 800mA, 8A	3V @ 800mA, 8A	3V @ 800mA, 8A	4V @ 3.2A, 16A	4V @ 3.2A, 16A
Current - Collector Cutoff (Max)	5 µA	5 µA	5 µA	100 µA	100 µA
Operating Temperature (TJ)	150°C	-50°C ~ 150°C	-50°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-264-3, TO-264AA	TO-264-3, TO-264AA	TO-264-3, TO-264AA	TO-264-3, TO-264AA	TO-264-3, TO-264AA
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Direct Substitutes (2SC5200OTU and FJL4315OTU):

The 2SC5200OTU (onsemi) and FJL4315OTU (Fairchild Semiconductor) are direct electrical and mechanical equivalents to the 2STC5949. Both devices match the 250 V breakdown voltage, 17 A collector current rating, and TO-264 package configuration. Both maintain the required DC current gain of 80 @ 1A, 5V and saturation voltage characteristics. Both are active products with ROHS3 compliance and REACH Unaffected status, ensuring long-term availability and regulatory compliance. The 2SC5200OTU is available in tube packaging with 6320 units in stock. The FJL4315OTU is supplied in HPM F2 packaging with 2450 units in stock. These parts are suitable for direct replacement in applications where the 2STC5949 was originally specified.

Similar Substitutes (MJL21194G and MJL21196G):

The MJL21194G and MJL21196G (both onsemi) are similar substitutes that maintain the 250 V breakdown voltage and TO-264 package compatibility. These devices are rated for 16 A maximum collector current, which is 1 A lower than the 2STC5949. The DC current gain is 25 @ 8A, 5V, which is lower than the 80 @ 1A, 5V specification of the main part. The collector cutoff current is 100µA, exceeding the 5µA specification. These parts are active products with ROHS3 compliance and REACH Unaffected status. Selection of these similar substitutes is appropriate only when the reduced current rating and modified gain characteristics are compatible with the application requirements.

Frequently Asked Questions (FAQ)

Q: Can the 2SC5200OTU directly replace the 2STC5949 in all applications?

A: The 2SC5200OTU meets all electrical and mechanical compatibility criteria for the 2STC5949, including voltage rating, current rating, DC current gain, saturation voltage, and package configuration. Direct replacement is supported for applications where these parameters are the primary selection criteria.

Q: What is the difference between the 2SC5200OTU and FJL4315OTU?

A: Both devices are direct electrical equivalents with identical voltage, current, and gain specifications. The primary difference is the supplier device package designation: 2SC5200OTU uses TO-264-3 packaging, while FJL4315OTU uses HPM F2 packaging. Both are mechanically compatible with TO-264-3 and TO-264AA footprints.

Q: Why are MJL21194G and MJL21196G classified as similar rather than direct substitutes?

A: The MJL21194G and MJL21196G have a maximum collector current rating of 16 A, which is 1 A lower than the 2STC5949 specification of 17 A. Additionally, the DC current gain is 25 @ 8A, 5V compared to 80 @ 1A, 5V for the main part, and the collector cutoff current is 100µA versus 5µA. These differences require application-level verification before selection.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed (2SC5200OTU, FJL4315OTU, MJL21194G, and MJL21196G) are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: What is the inventory status of substitute parts?

A: The 2SC5200OTU has 6320 units in stock, FJL4315OTU has 2450 units in stock, MJL21194G has 1636 units in stock, and MJL21196G has 2016 units in stock. All substitute parts are active products with established supply chains.

Q: Can the 2STC5949 be used in new designs?

A: The 2STC5949 is classified as obsolete. New designs should incorporate one of the active substitute parts to ensure long-term component availability and manufacturing support.

Q: What are the thermal operating range differences between the main part and substitutes?

A: The 2STC5949 specifies a maximum junction temperature of 150°C. The 2SC5200OTU and FJL4315OTU support -50°C to 150°C operating range. The MJL21194G and MJL21196G support -65°C to 150°C operating range. All parts support the 150°C maximum requirement of the original specification.

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