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2SD2643 Equivalent & Substitute Parts Reference
Part Overview
The Sanken Electric USA Inc. 2SD2643 is an NPN Darlington bipolar junction transistor (BJT) rated for 110 V, 6 A, and 60 W power dissipation with a frequency of 60 MHz. Packaged in a TO-3P-3 Full Pack (TO-3PF) case for through-hole mounting, it is designed for high-gain, high-power switching and amplification applications. The product status is listed as obsolete, requiring engineers and technicians to identify suitable substitute transistors that match the original electrical and mechanical parameters for ongoing designs and maintenance needs.
Substiute Parts
Key Parameters
| Parameter | 2SD2643 Value |
|---|---|
| Transistor Type | NPN - Darlington |
| Current - Collector (Ic) (Max) | 6 A |
| Voltage - Collector Emitter Breakdown (Max) | 110 V |
| Vce Saturation (Max) @ Ib, Ic | 2.5V @ 5mA, 5A |
| Current - Collector Cutoff (Max) | 100µA (ICBO) |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 5000 @ 5A, 4V |
| Power - Max | 60 W |
| Frequency - Transition | 60MHz |
| Operating Temperature | 150°C (TJ) |
| Mounting Type | Through Hole |
| Package / Case | TO-3P-3 Full Pack |
| Supplier Device Package | TO-3PF |
| RoHS Status | RoHS Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution in the "Transistors, Bipolar (BJT)" category is determined by matching the following key parameters: transistor type, maximum collector current, maximum collector-emitter breakdown voltage, collector-emitter saturation voltage, maximum collector cutoff current, minimum DC current gain under specified test conditions, maximum power dissipation, transition frequency, operating temperature, mechanical mounting type, and package compatibility. Substitute parts must match or exceed the main part's electrical parameters and maintain identical package and mounting formats for direct replacement.
Parameter Comparison
| Parameter | Main Part: 2SD2643 | Substitute: 2SD2439 |
|---|---|---|
| Manufacturer | Sanken Electric USA Inc. | Sanken Electric USA Inc. |
| Transistor Type | NPN - Darlington | NPN - Darlington |
| Current - Collector (Ic) (Max) | 6 A | 10 A |
| Voltage - Collector Emitter Breakdown (Max) | 110 V | 150 V |
| Vce Saturation (Max) @ Ib, Ic | 2.5V @ 5mA, 5A | 2.5V @ 7mA, 7A |
| Current - Collector Cutoff (Max) | 100µA (ICBO) | 100µA (ICBO) |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 5000 @ 5A, 4V | 5000 @ 7A, 4V |
| Power - Max | 60 W | 80 W |
| Frequency - Transition | 60MHz | 55MHz |
| Operating Temperature | 150°C (TJ) | 150°C (TJ) |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | TO-3P-3 Full Pack | TO-3P-3 Full Pack |
| Supplier Device Package | TO-3PF | TO-3PF |
| RoHS Status | RoHS Compliant | RoHS Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
The main part, 2SD2643, is obsolete. Substitute part 2SD2439 is active and maintains RoHS compliance and identical moisture sensitivity ratings. Selection is primarily determined by product status and regulatory compliance as all other required parameter values are provided and comparable.
Frequently Asked Questions (FAQ)
Q1: What are the key parameters required to identify substitute NPN Darlington BJTs for 2SD2643?
A1: Essential parameters include transistor type, maximum collector current, collector-emitter breakdown voltage, collector-emitter saturation voltage, collector cutoff current, DC current gain, maximum power dissipation, transition frequency, operating temperature, mounting type, and package compatibility.
Q2: Are 2SD2439 and 2SD2643 compatible in terms of mechanical mounting and package?
A2: Both 2SD2439 and 2SD2643 use the TO-3P-3 Full Pack case and TO-3PF supplier device package with through-hole mounting.
Q3: Is RoHS compliance maintained with the substitute 2SD2439?
A3: 2SD2439 is RoHS compliant, matching the compliance status of the original 2SD2643.
Q4: Does the substitute part meet the same moisture sensitivity requirements?
A4: Both parts have a moisture sensitivity level (MSL) rating of 1 (Unlimited).
Q5: Can the substitute part be used in the same operating temperature range as the original?
A5: Both parts have a maximum operating junction temperature of 150°C (TJ).
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