Equivalent & Substitute Parts Reference: 2SD2657TL

Part Overview

The Rohm Semiconductor 2SD2657TL is an active, surface-mount, NPN bipolar junction transistor (BJT) designed for switching and amplification applications. It features a maximum collector-emitter voltage of 30 V, a collector current of 1.5 A, and a transition frequency of 300 MHz in the TSMT3 package. The need to identify alternative or substitute transistor models arises due to variations in inventory availability, packaging formats, or specific application requirements requiring drop-in compatible products within the same electrical and mechanical specification class.

Key Parameters

Parameter	Value
Manufacturer Part Number	2SD2657TL
Manufacturer	Rohm Semiconductor
Transistor Type	NPN
Voltage - Collector Emitter Breakdown (Max)	30 V
Current - Collector (Ic) (Max)	1.5 A
DC Current Gain (hFE) (Min) @ Ic, Vce	270 @ 100mA, 2V
Frequency - Transition	300MHz
Power - Max	1 W
Vce Saturation (Max) @ Ib, Ic	350mV @ 50mA, 1A
Current - Collector Cutoff (Max)	100nA (ICBO)
Operating Temperature	150°C (TJ)
Mounting Type	Surface Mount
Package / Case	SC-96
RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected
Product Status	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute part identification for transistors in the bipolar (BJT) category is strictly based on the following electrical and mechanical parameters: transistor type (NPN), maximum collector-emitter voltage, maximum collector current, DC current gain (hFE) at defined test conditions, transition frequency (ft), maximum power dissipation, Vce saturation at stated test current, cutoff current (ICBO), package/case type, mounting method, and compliance certifications. Equivalent and substitute options must satisfy these criteria as provided for the main part without deviation.

Parameter Comparison

Parameter	2SD2657TL	2SD2657KT146	2SD2675TL	PBSS4230T,215
Transistor Type	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	30 V	30 V	30 V	30 V
Current - Collector (Ic) (Max)	1.5 A	1.5 A	1 A	2 A
DC Current Gain (hFE) (Min) @ Ic, Vce	270 @ 100mA, 2V	270 @ 100mA, 2V	270 @ 100mA, 2V	300 @ 1A, 2V
Frequency - Transition	300MHz	330MHz	320MHz	230MHz
Power - Max	1 W	200 mW	500 mW	480 mW
Vce Saturation (Max)	350mV @ 50mA, 1A	350mV @ 50mA, 1A	350mV @ 25mA, 500mA	320mV @ 200mA, 2A
Current - Collector Cutoff (Max)	100nA (ICBO)	100nA (ICBO)	100nA (ICBO)	100nA (ICBO)
Operating Temperature	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-96	TO-236-3, SC-59, SOT-23-3	SC-96	TO-236-3, SC-59, SOT-23-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All substitute parts listed (2SD2657KT146, 2SD2675TL, PBSS4230T,215) share active product status, ROHS3 compliance, REACH unaffected certification, and unlimited moisture sensitivity (MSL 1). These attributes confirm suitability for direct substitution where regulatory compliance and lifecycle status are mandatory selection factors. Base selection on part availability and package compatibility with the application's requirements as provided.

Frequently Asked Questions (FAQ)

Q1: Which electrical parameters must match when substituting NPN bipolar transistors in the same category?
A1: Substitution requires matching transistor type (NPN), maximum collector-emitter voltage, collector current, DC current gain at specified test conditions, maximum power dissipation, transition frequency, Vce saturation, and cutoff current.

Q2: How important is package type for direct replacement?
A2: Mechanical compatibility is critical. Direct substitution is valid only if the package/case type and mounting method match the application's requirements exactly as per the provided specifications.

Q3: Does regulatory compliance (RoHS, REACH) affect substitution choices?
A3: Yes. All listed equivalents must meet the same compliance certifications (ROHS3 and REACH unaffected) and moisture sensitivity rating to ensure suitability for regulated manufacturing environments.

Q4: What other factors are considered in this equivalency grouping?
A4: Only parameters explicitly specified—product status, electrical ratings, mechanical format, certification, and package—are considered for substitution eligibility.

Q5: Are substitutes with higher or lower maximum ratings suitable?
A5: Substitution is determined strictly by the parameters provided. Maximum ratings, if different, must be clearly considered only if fully compatible with the application as detailed above.

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