2SC4617-Q-TP Equivalent & Substitute Parts

Part Overview

The 2SC4617-Q-TP is a Surface Mount NPN Bipolar Junction Transistor manufactured by Micro Commercial Co, rated for 50V collector-emitter breakdown voltage and 150mA maximum collector current. This device is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements. The part operates across an industrial temperature range of -55°C to 150°C and is packaged in the SOT-523 surface mount configuration.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Maximum Collector Current (Ic)	150	mA
Collector-Emitter Breakdown Voltage (VCEO)	50	V
Maximum Power Dissipation	150	mW
Transition Frequency (fT)	180	MHz
Operating Temperature Range	-55 to 150	°C
Package Type	SOT-523	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the 2SC4617-Q-TP is determined by electrical and mechanical parameter equivalence within the NPN BJT category. The critical parameters governing substitution are:

Transistor Polarity: NPN configuration
Collector Current Rating: 150mA maximum
Breakdown Voltage: 50V minimum VCEO
Power Dissipation: 150mW maximum
Transition Frequency: 180MHz minimum
Temperature Range: -55°C to 150°C operating capability
Package: SOT-523 surface mount configuration
DC Current Gain (hFE): 120 minimum at specified bias conditions

The 2DC4617Q-7-F from Diodes Incorporated meets all electrical specifications and mechanical requirements, with the additional advantage of active product status and improved leakage current performance (100nA versus 500nA ICBO).

Parameter Comparison

Parameter	2SC4617-Q-TP (Micro Commercial Co)	2DC4617Q-7-F (Diodes Incorporated)	Match Status
Transistor Type	NPN	NPN	Equivalent
Ic (Max)	150 mA	150 mA	Equivalent
VCEO (Max)	50 V	50 V	Equivalent
Vce Saturation @ Ib, Ic	400mV @ 5mA, 50mA	400mV @ 5mA, 50mA	Equivalent
ICBO (Max)	500 nA	100 nA	Substitute Superior
hFE (Min) @ Ic, Vce	120 @ 1mA, 6V	120 @ 1mA, 6V	Equivalent
Power (Max)	150 mW	150 mW	Equivalent
Frequency - Transition	180 MHz	180 MHz	Equivalent
Operating Temperature	-55°C to 150°C	-55°C to 150°C	Equivalent
Package / Case	SOT-523	SOT-523	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
MSL Rating	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Obsolete	Active	Substitute Preferred

Engineering Selection Recommendations

The 2DC4617Q-7-F is the direct functional equivalent for the obsolete 2SC4617-Q-TP. Selection of the Diodes Incorporated substitute is supported by the following engineering criteria:

Electrical Equivalence: All primary electrical parameters—collector current, breakdown voltage, saturation characteristics, current gain, power dissipation, and transition frequency—are identical between the main part and substitute.

Mechanical Compatibility: Both devices utilize the SOT-523 surface mount package, ensuring PCB layout and assembly process compatibility without modification.

Compliance Status: The 2DC4617Q-7-F maintains ROHS3 compliance and carries REACH Unaffected status, meeting regulatory requirements equivalent to the original part.

Product Lifecycle: The substitute part maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete 2SC4617-Q-TP.

Performance Enhancement: The 2DC4617Q-7-F exhibits superior leakage current performance (100nA ICBO versus 500nA), providing improved circuit performance in low-power applications.

Frequently Asked Questions (FAQ)

Q: Can the 2DC4617Q-7-F be used as a direct replacement for the 2SC4617-Q-TP in existing designs?

A: Yes. The 2DC4617Q-7-F meets all electrical and mechanical specifications of the 2SC4617-Q-TP. No circuit modifications are required for substitution. Both devices are rated for identical collector current (150mA), breakdown voltage (50V), power dissipation (150mW), and operate across the same temperature range (-55°C to 150°C).

Q: What is the primary advantage of substituting to the 2DC4617Q-7-F?

A: The 2DC4617Q-7-F is an active product with established supply chain availability, whereas the 2SC4617-Q-TP is obsolete. Additionally, the substitute exhibits lower collector-emitter leakage current (100nA versus 500nA), which may improve circuit performance in sensitive applications.

Q: Are there packaging differences between these parts?

A: No. Both the 2SC4617-Q-TP and 2DC4617Q-7-F are packaged in SOT-523 surface mount configuration. The 2DC4617Q-7-F is supplied in Tape & Reel format, which is standard for production quantities.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both devices are ROHS3 compliant and carry identical moisture sensitivity level (MSL 1 - Unlimited). The 2DC4617Q-7-F additionally carries REACH Unaffected status.

Q: What are the saturation voltage characteristics for the substitute part?

A: The 2DC4617Q-7-F maintains identical saturation voltage specifications: 400mV maximum at Ib = 5mA and Ic = 50mA, matching the original 2SC4617-Q-TP.

Q: Is the DC current gain (hFE) specification identical between the two parts?

A: Yes. Both devices specify a minimum hFE of 120 at Ic = 1mA and Vce = 6V, ensuring equivalent amplification characteristics in circuit applications.

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