2N3701 Equivalent & Substitute Parts

Part Overview

The 2N3701 is an NPN bipolar junction transistor manufactured by Central Semiconductor Corp, designed for general-purpose switching and amplification applications. This through-hole component operates at maximum collector current of 1 A and collector-emitter breakdown voltage of 80 V, with a maximum power dissipation of 1.8 W. The device is classified as Active product status and is RoHS3 compliant. Substitute parts are identified to address inventory availability, supply chain continuity, or specific application requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	-
Current - Collector (Ic) Max	1	A
Voltage - Collector Emitter Breakdown (Max)	80	V
Vce Saturation (Max)	500	mV @ 50mA, 500mA
Current - Collector Cutoff (Max)	10	nA
Power - Max	1.8	W
Frequency - Transition	80	MHz
Operating Temperature Range	-65 to 200	°C (TJ)
Mounting Type	Through Hole	-
Package / Case	TO-206AA, TO-18-3 Metal Can	-

Substitute Part Grouping Explanation

Substitution of the 2N3701 is determined by strict equivalence of the following electrical and mechanical parameters:

Critical Matching Parameters:

Transistor Type: NPN
Current - Collector (Ic) Max: 1 A
Voltage - Collector Emitter Breakdown (Max): 80 V
Vce Saturation (Max): 500 mV @ 50mA, 500mA
Current - Collector Cutoff (Max): 10 nA
Operating Temperature Range: -65°C to 200°C
Mounting Type: Through Hole
Package / Case: TO-206AA, TO-18-3 Metal Can

The 2N3700 manufactured by Microchip Technology meets all critical electrical parameters and package specifications. Variations in DC Current Gain (hFE), Power dissipation rating, and Frequency - Transition do not disqualify substitution when the primary electrical ratings and thermal operating range are equivalent.

Parameter Comparison

Parameter	2N3701 (Central Semiconductor)	2N3700 (Microchip Technology)	Match Status
Transistor Type	NPN	NPN	Equivalent
Current - Collector (Ic) Max	1 A	1 A	Equivalent
Voltage - Collector Emitter Breakdown (Max)	80 V	80 V	Equivalent
Vce Saturation (Max)	500 mV @ 50mA, 500mA	500 mV @ 50mA, 500mA	Equivalent
Current - Collector Cutoff (Max)	10 nA	10 nA	Equivalent
Operating Temperature Range	-65°C to 200°C	-65°C to 200°C	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	TO-206AA, TO-18-3 Metal Can	TO-206AA, TO-18-3 Metal Can	Equivalent
Power - Max	1.8 W	500 mW	2N3700 rated lower
Frequency - Transition	80 MHz	Not specified	Data not provided
DC Current Gain (hFE) Min	100 @ 150mA, 10V	50 @ 500mA, 10V	Different test conditions
RoHS Status	RoHS3 Compliant	RoHS non-compliant	Different compliance

Engineering Selection Recommendations

2N3700 Substitution Criteria:

The 2N3700 is electrically and mechanically equivalent to the 2N3701 for applications requiring NPN transistor operation at 1 A collector current and 80 V collector-emitter breakdown voltage in TO-18 through-hole package.

Compliance Consideration: The 2N3701 is RoHS3 compliant, while the 2N3700 is RoHS non-compliant. Selection between these parts must account for end-product regulatory requirements. Both parts are REACH Unaffected and classified under ECCN EAR99.

Power Dissipation: The 2N3701 is rated at 1.8 W maximum power dissipation, while the 2N3700 is rated at 500 mW. In applications where continuous power dissipation approaches or exceeds 500 mW, the 2N3701 provides superior thermal margin. For applications operating below 500 mW, both parts are suitable.

Inventory Availability: The 2N3700 maintains higher stock levels (3672 pcs) compared to the 2N3701 (899 pcs), supporting supply chain continuity for high-volume production.

Frequently Asked Questions (FAQ)

Q: Can the 2N3700 directly replace the 2N3701 in all applications?

A: The 2N3700 is electrically and mechanically compatible with the 2N3701 for circuits operating within the specified electrical parameters. However, applications requiring RoHS3 compliance must use the 2N3701. Applications with continuous power dissipation exceeding 500 mW should use the 2N3701 due to its higher power rating.

Q: What is the significance of the different DC Current Gain (hFE) specifications?

A: The 2N3701 specifies hFE minimum of 100 at 150 mA collector current and 10 V collector-emitter voltage. The 2N3700 specifies hFE minimum of 50 at 500 mA collector current and 10 V collector-emitter voltage. These are measured at different operating points and do not indicate incompatibility. Circuit designs must account for the actual hFE values at the intended operating point.

Q: Are both parts available in the same package?

A: Yes. Both the 2N3701 and 2N3700 are packaged in TO-206AA and TO-18-3 Metal Can configurations, ensuring mechanical and pin compatibility for through-hole PCB mounting.

Q: What is the impact of the 2N3700 being RoHS non-compliant?

A: RoHS compliance is a regulatory requirement for products sold into specific markets, particularly the European Union. If the end product requires RoHS3 certification, the 2N3701 must be used. If RoHS compliance is not required, the 2N3700 is suitable.

Q: How do the operating temperature ranges compare?

A: Both parts operate across the identical temperature range of -65°C to 200°C junction temperature, ensuring thermal compatibility in all specified operating environments.

Q: Is the 2N3700 suitable for high-frequency applications?

A: The 2N3700 does not specify a transition frequency parameter. The 2N3701 specifies 80 MHz transition frequency. For applications requiring defined high-frequency performance, the 2N3701 is the specified choice.

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