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2SD1785 NPN Darlington transistor rated for 120V collector-emitter voltage and 6A collector current. High DC current gain of 2000 minimum at 3A.
Mfr Part #:

2SD1785

Available from 2 distributors
Mfr Name: Sanken
Sanken
NPN Darlington transistor rated for 120V collector-emitter voltage and 6A collector current. High DC current gain of 2000 minimum at 3A.
✓ Total Stock: 50 pcs
$ Price Range: $0.25

2SD1785 Available from 2 distributors

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✓ Non-Authorised
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25 pcs
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25 pcs On Request 1 On Request On Request On Request On Request On Request
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Non-Authorised Inventory information
25 pcs
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25 pcs On Request 1 On Request On Request On Request On Request On Request
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2SD1785 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Automotive Grade
Current
DC Current Gain (hFE) (Min) @ Ic, Vce
Frequency
Mounting Type
Operating Temperature
Power
Storage Temperature
Supplier Device Package
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage
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2SD1785 Description

Short technical summary and product information.

The 2SD1785 is a silicon NPN triple diffused planar Darlington transistor from Sanken. It features a collector-emitter breakdown voltage of 120V minimum and a continuous collector current rating of 6A (10A pulse). The Darlington configuration provides a high DC current gain (hFE) of 2000 minimum at VCE=2V and IC=3A, enabling low base drive requirements. The collector-emitter saturation voltage is typically 1.5V maximum at IC=2A and IB=3mA. With a transition frequency of 100 MHz and collector-base capacitance of 70 pF, it is suitable for moderate-speed switching applications.

 

This transistor is housed in a TO-220-3 Full Pack (TO220F) through-hole package, which facilitates easy mounting and heatsinking. The maximum power dissipation is 30W at case temperature 25°C, and the operating junction temperature can reach up to 150°C. The storage temperature range is -55°C to +150°C. The complementary PNP type is 2SB1258.

 

Typical applications include relay drivers, solenoid drivers, motor drivers, and series regulators. The device is RoHS3 compliant (unverified) and REACH unaffected (unverified).

2SD1785 Quick Information

Product Type: Bipolar Transistor - Darlington
Canonical Name: 2SD1785 NPN Darlington Transistor
Subcategory: Darlington Transistor

2SD1785 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

2SD1785 Estimated Pricing

Qty Low High
7,500+ $0.25 $0.25

Estimated market price range - modelled values for guidance only, not live distributor offers.

2SD1785 Features

  • NPN Darlington transistor with high gain.
  • Rated for 120V collector-emitter voltage.
  • Supports 6A continuous collector current.
  • Through-hole TO220F package for easy mounting.
  • Complementary PNP type 2SB1258 available.

2SD1785 Applications

  • Ideal for relay and solenoid driver circuits.
  • Used in motor driver applications.
  • Suitable for series regulator designs.
  • General purpose switching applications.

2SD1785 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the collector-emitter breakdown voltage?

120V minimum at IC=10mA.

What is the maximum collector current?

6A continuous, 10A pulse.

What is the DC current gain?

Minimum 2000 at VCE=2V, IC=3A.

What is the package type?

TO-220-3 Full Pack (TO220F), through-hole mounting.

What is the operating junction temperature?

Maximum 150°C.

Is it RoHS compliant?

RoHS3 compliant (unverified).

Is there a complementary part?

Yes, the 2SB1258 PNP Darlington transistor.

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