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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Diodes Incorporated DP350T05-7

Name: DP350T05-7
Brand: Diodes Incorporated
SKU: DP350T05-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DP350T05-7

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: DP350T05-7.pdf

Description:: TRANS PNP 350V 0.5A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:293,758

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Product details

Overview

DP350T05-7 from Diodes Incorporated is a PNP epitaxial planar small-signal transistor in SOT-23 package, rated for -350 V V_CEO, -500 mA I_C, and 300 mW P_D, designed for medium-power switching and amplification in automotive and industrial power control circuits.

For engineers reviewing the DP350T05-7 datasheet, DP350T05-7 pinout, DP350T05-7 application, or DP350T05-7 equivalent, key selection criteria include breakdown voltage margin, DC current gain at high collector current, saturation voltage under drive conditions, thermal resistance on FR-4 PCB, and AEC-Q101 qualification status.

Technical Context

This PNP bipolar junction transistor uses epitaxial planar die construction to ensure stable gain and low leakage across temperature. Its -350 V V_CBO/V_CEO rating supports operation in high-voltage bias rails, while the -5.0 V V_EBO enables reliable base-emitter control in grounded-emitter configurations.

The device delivers h_FE = 20–200 across I_C = -1.0 mA to -100 mA at V_CE = -10 V, with V_CE(SAT) ≤ -0.50 V at I_C = -30 mA/I_B = -3.0 mA, enabling efficient switching in discrete driver stages without active gate control.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-350 V - Supports operation in 200–300 V DC bus switching applications without derating.
I_C	-500 mA - Enables direct drive of medium-current loads such as relay coils or LED strings.
P_D	300 mW - Requires minimal heatsinking on standard FR-4 PCB per Diodes AP02001 layout.
R_θJA	417 °C/W - Limits junction rise to ~125°C at full power in still air, consistent with industrial ambient limits.
f_T	50 MHz - Sufficient for audio-frequency amplification and PWM switching up to ~5 MHz.
h_FE	20–200 - Provides predictable current amplification across operating range, supporting analog gain staging.
V_CE(SAT)	≤ -0.50 V @ I_C = -30 mA - Minimizes conduction loss in saturated switch mode.

Pinout & Package

Package: SOT-23 - Surface-mount plastic case (UL 94V-0), 0.008 g weight, moisture sensitivity level 1, matte tin-plated terminals solderable per MIL-STD-202 Method 208.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal	Connected to higher potential rail; must be referenced to stable voltage for biasing.
2 (Base)	Control input	Receives negative current to turn on; requires series resistor to limit I_B per h_FE target.
3 (Collector)	Current sink terminal	Connected to load and ground return; handles full switched current and voltage stress.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing.
RoHS-compliant "Green" construction	No lead, halogen, or antimony; uses halogen-free molding compound meeting IEC 61249-2-21.
Epitaxial planar die	Ensures tight parameter distribution and low leakage (I_CBO ≤ -50 nA) over -55°C to +150°C.
SOT-23 footprint compatibility	Enables drop-in replacement of industry-standard PNP transistors without board redesign.

Applications

Automotive Door Lock Actuator Control

Industrial 24 V DC Relay Driver

Use Scenario: Driving solenoid-based door lock actuators in body control modules requiring intermittent 300–400 mA pulses at 12 V.

IC Role / Device Role / Timing Role: PNP switch providing high-side current sourcing with fast turn-off via base pull-down.

Use Value: V_CEO = -350 V ensures margin against load dump transients; V_CE(SAT) ≤ -0.50 V limits power loss during 100 ms actuation.

Use Scenario: Controlling 24 V DC coil relays in programmable logic controller (PLC) output modules.

IC Role / Device Role / Timing Role: Discrete high-voltage switch interfacing microcontroller GPIO to inductive load.

Use Value: AEC-Q101 qualification guarantees long-term stability in industrial environments; h_FE ≥ 20 at -50 mA ensures robust drive with minimal base current.

High-Voltage Bias Supply Regulation

LED String Current Sink (HV)

Use Scenario: Regulating auxiliary bias supply rails in offline AC/DC converters operating from 230 VAC rectified input.

IC Role / Device Role / Timing Role: Pass transistor in linear regulator stage delivering stable 15 V to control ICs.

Use Value: -350 V V_CBO withstands peak rectified voltage (~325 V); R_θJA = 417 °C/W allows operation without heatsink at <150 mW dissipation.

Use Scenario: Constant-current sink for 3–5 series white LEDs powered from 100–200 V DC intermediate bus.

IC Role / Device Role / Timing Role: Linear current regulator using emitter degeneration resistor and base bias network.

Use Value: f_T = 50 MHz supports fast dimming response; low C_obo = 7.0 pF minimizes high-frequency noise coupling into sensitive analog feedback paths.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP medium-power switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT3906	V_CEO = -40 V, I_C = -200 mA, P_D = 200 mW - lower voltage/current capability	Not suitable for >60 V bus applications; limited to low-voltage logic-level switching	Select only when operating voltage ≤ 30 V and power dissipation < 150 mW.
ZTX753	V_CEO = -300 V, I_C = -1 A, P_D = 1 W - higher power, TO-92 package	Requires through-hole assembly and heatsinking; incompatible with SOT-23 footprint	Choose when >500 mA continuous current or >300 mW dissipation is required, accepting larger board area.

Compared with MMBT3906 and ZTX753, DP350T05-7 uniquely balances 350 V blocking, 500 mA current, SOT-23 surface-mount compatibility, and AEC-Q101 qualification-making it optimal for space-constrained, high-reliability medium-voltage switching where neither low-voltage nor through-hole alternatives suffice.

Availability

DP350T05-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC output stages, and high-voltage auxiliary power supplies requiring stable component supply and long-term lifecycle support.

Supply support for DP350T05-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.

The DP350T05-7 belongs to Diodes' AEC-Q101-qualified high-voltage bipolar transistor family, engineered specifically for robust switching in harsh-environment power control applications.

FAQ

What is the maximum safe operating voltage for DP350T05-7 in continuous DC applications?

The DP350T05-7 is rated for -350 V V_CEO and -350 V V_CBO at T_A = 25°C. For continuous DC operation, design voltage should not exceed 80% of V_CEO (i.e., ≤ -280 V) to maintain safety margin against transients and temperature-induced derating per the datasheet's Fig. 1 power derating curve.

Does DP350T05-7 require a base resistor, and how is its value calculated?

Yes - a base resistor is mandatory to limit I_B and prevent thermal runaway. For I_C = -30 mA and minimum h_FE = 20, I_B ≥ -1.5 mA is needed. With V_BE(ON) ≈ -2.0 V at I_C = -100 mA and 3.3 V GPIO drive, R_B = (3.3 V − 2.0 V)/1.5 mA ≈ 860 Ω; 1 kΩ is recommended for margin.

Can DP350T05-7 replace DN350T05 in the same circuit?

No - DP350T05-7 is PNP; DN350T05 is its complementary NPN counterpart. They share identical voltage/current ratings and SOT-23 package but opposite polarity. Swapping them would invert logic behavior and likely cause circuit failure unless the entire bias network is redesigned for NPN operation.

Is DP350T05-7 suitable for switching inductive loads like relays, and what protection is needed?

Yes - its -350 V V_CEO rating accommodates typical relay coil flyback voltages. A reverse-biased freewheeling diode (e.g., 1N4148) must be placed across the inductive load to clamp V_CE spikes during turn-off, preventing avalanche stress beyond the rated breakdown voltage.

DP350T05-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 350 V

Vce Saturation (Max) @ Ib, Ic:: 1V @ 5mA, 50mA

Current - Collector Cutoff (Max):: 50nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 20 @ 50mA, 10V

Power - Max:: 300 mW

Frequency - Transition:: 50MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

DP350T05-7 FAQ

1.How can I place an order for DP350T05-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DP350T05-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for DP350T05-7 reliable?

The price and inventory of DP350T05-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DP350T05-7 is usually 5 days.

3.What payment methods are accepted for DP350T05-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DP350T05-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DP350T05-7?

DP350T05-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DP350T05-7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for DP350T05-7?

For technical support, including DP350T05-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DP350T05-7 requirements.

6.How does Aetrix verify that DP350T05-7 is sourced from the original manufacturer or authorized distributors?

All DP350T05-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DP350T05-7 meets industry standards.

7.What is the process for return or replacement of DP350T05-7?

All DP350T05-7 units undergo pre-shipment inspection (PSI). If there is an issue with DP350T05-7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The DP350T05-7 part is unused and in its original packaging.

Return procedure for DP350T05-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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