2SC3646T-P-TD-E Equivalent & Substitute Parts

Part Overview

The 2SC3646T-P-TD-E is a Surface Mount NPN Bipolar Junction Transistor manufactured by onsemi, rated for 100 V collector-emitter breakdown voltage and 1 A maximum collector current. This device is designed for general-purpose switching and amplification applications with a maximum power dissipation of 500 mW and transition frequency of 120 MHz. The part is currently classified as Obsolete, necessitating identification of equivalent substitute components for ongoing production and maintenance requirements. Active equivalent parts are available with identical electrical specifications and package compatibility.

Substiute Parts

2SC3646T-P-TD-E

onsemiIn Stock: 84102SC3646T-P-TD-E Datasheet

Current PartRFQ

2SC3646T-TD-E

onsemiIn Stock: 160802SC3646T-TD-E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SC3646T-P-TD-E is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Transistor Type: NPN
• Current - Collector (Ic) Max: 1 A
• Voltage - Collector Emitter Breakdown (Max): 100 V
• Vce Saturation (Max): 400 mV @ 40mA, 400mA
• Current - Collector Cutoff (Max): 100 nA
• Power - Max: 500 mW
• Frequency - Transition: 120 MHz
• Package / Case: TO-243AA
• Mounting Type: Surface Mount
• Moisture Sensitivity Level: 1 (Unlimited)

The 2SC3646T-TD-E meets all critical electrical specifications and package requirements for direct substitution. Variations in DC Current Gain (hFE) minimum values and product status do not preclude functional equivalence when the specified electrical operating parameters are maintained within circuit design tolerances.

Parameter Comparison

Engineering Selection Recommendations

The 2SC3646T-TD-E is the direct equivalent substitute for the obsolete 2SC3646T-P-TD-E. Both components are manufactured by onsemi and share identical electrical ratings, package specifications, and regulatory compliance status. The substitute part is currently in Active product status with higher inventory availability (16,000 pcs vs. 8,300 pcs), ensuring supply chain continuity.

The primary difference is the DC Current Gain (hFE) minimum specification: the main part specifies 200 @ 100mA, 5V while the substitute specifies 100 @ 100mA, 5V. This lower minimum gain in the substitute part does not affect functional equivalence for applications designed to the main part's electrical operating parameters, as both devices meet the critical voltage, current, power, and frequency specifications.

Both parts maintain REACH Unaffected status and EAR99 export classification. The substitute part carries RoHS3 Compliance certification, providing additional environmental compliance assurance for new designs and production transitions.

Frequently Asked Questions (FAQ)

Q: Can the 2SC3646T-TD-E directly replace the 2SC3646T-P-TD-E in existing designs?

A: Yes. Both parts are manufactured by onsemi with identical electrical specifications for collector current (1 A), collector-emitter breakdown voltage (100 V), saturation voltage (400 mV), power dissipation (500 mW), and transition frequency (120 MHz). The TO-243AA package and Surface Mount mounting type are identical, enabling direct substitution without circuit board modifications.

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

A: The main part specifies a minimum hFE of 200 @ 100mA, 5V, while the substitute specifies 100 @ 100mA, 5V. The substitute's lower minimum gain remains within acceptable operating ranges for circuits designed to the main part's specifications. Circuit designs that do not depend on the higher gain minimum will experience no functional difference.

Q: Are there packaging differences between these parts?

A: No. Both the 2SC3646T-P-TD-E and 2SC3646T-TD-E use the TO-243AA package with Surface Mount mounting. The primary packaging difference is the supplier device package designation: the main part uses PCP (Plastic Chip Carrier) while the substitute is available in Cut Tape (CT) and Digi-Reel® formats, which are standard distribution methods for surface mount components.

Q: What is the product status difference, and does it affect compatibility?

A: The main part is classified as Obsolete, while the substitute is Active. This status difference reflects manufacturing availability rather than electrical or mechanical incompatibility. The Active status of the substitute ensures continued supply and support from the manufacturer.

Q: Are regulatory and compliance certifications equivalent?

A: Yes. Both parts maintain REACH Unaffected status and EAR99 export classification. The substitute part additionally carries RoHS3 Compliance certification, providing enhanced environmental compliance documentation for production and regulatory requirements.

Q: What inventory considerations apply to these parts?

A: The main part has 8,300 pcs in stock, while the substitute has 16,000 pcs available. For new production or design transitions, the substitute part offers superior supply chain security and availability.