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Diodes Incorporated DRDNB26W-7
- Part No.:
- DRDNB26W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
DRDNB26W-7.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:6,551
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Product details
Overview
DRDNB26W-7 from Diodes Incorporated is a pre-biased NPN transistor with integrated 1 kΩ and 10 kΩ bias resistors, housed in a single SOT-363 package alongside a 75 V switching diode. It delivers 600 mA output current, 0.3 V saturation voltage at 50 mA/2.5 mA drive, and supports relay driver applications requiring fast turn-off and low-power logic-level interfacing.
For engineers reviewing the DRDNB26W-7 datasheet, DRDNB26W-7 pinout, DRDNB26W-7 application, or DRDNB26W-7 equivalent, this device serves as an integrated relay driver solution where space-constrained PCBs demand combined transistor + flyback diode functionality without external components.
Technical Context
The DRDNB26W-7 integrates a pre-biased NPN transistor (VCC = 50 V, IC = 600 mA) and a 75 V, 500 mA switching diode in one SOT-363 package. Its internal 1 kΩ base resistor enables direct microcontroller GPIO drive, while the 10 kΩ pull-down ensures reliable turn-off.
The diode provides flyback protection for inductive loads such as relays and solenoids, with 4.0 ns reverse recovery time and 4.0 pF capacitance at 0 V, minimizing switching noise and enabling high-frequency operation up to 200 MHz fT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Max | 50 V - Supports industrial relay coils rated up to 48 V DC without external voltage limiting. |
| IC Max | 600 mA - Drives standard 12 V/24 V signal relays with ≥100 mW coil power. |
| VCE(SAT) | 0.3 V @ 50 mA/2.5 mA - Minimizes power loss and self-heating during sustained relay activation. |
| VRWM | 75 V - Clamps inductive kickback from relays with L/R time constants typical of automotive and industrial control. |
| trr | 4.0 ns - Enables clean switching at frequencies >1 MHz, reducing EMI in dense control boards. |
| RθJA | 625 °C/W - Requires minimal copper area (1-inch² 2 oz) for thermal management in ambient ≤85 °C. |
| Package | SOT-363 - 6-pin compact footprint (2.15 × 2.10 mm) compatible with standard pick-and-place and reflow processes. |
Pinout & Package
Package: SOT-363 - Molded plastic, green compound, UL 94V-0 rated, 0.008 g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Transistor emitter | Common reference node for both transistor and diode; connects to system ground in sink configuration. |
| Pin 2 | Transistor base (via 1 kΩ resistor) | Logic-level input terminal; accepts 0–5 V signals directly from MCU GPIO without series resistor. |
| Pin 3 | Diode cathode | Connects to relay coil positive; clamps flyback voltage to VCC during turn-off. |
| Pin 4 | Transistor collector / Diode anode | Shared node - ties relay coil negative to transistor collector and diode anode for compact flyback path. |
| Pin 5 | Transistor base (via 10 kΩ resistor) | Pull-down path ensuring guaranteed turn-off when input floats or goes high-impedance. |
| Pin 6 | Diode anode / Transistor collector | Same net as Pin 4 - redundant connection confirming internal bond-wire tie between collector and diode anode. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias network | 1 kΩ pull-up + 10 kΩ pull-down resistors eliminate external components and reduce BOM count by two passive parts. |
| Flyback diode co-packaged | 75 V, 4 ns trr diode shares same thermal environment as transistor, ensuring matched reliability under surge conditions. |
| Low VCE(SAT) | 0.3 V at 50 mA load enables <15 mW conduction loss, critical for thermally constrained relay modules. |
| AEC-Q101 readiness | Manufactured in IATF 16949 certified facilities; qualified per AEC-Q101 stress tests for automotive relay control use. |
| Green RoHS compliance | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb), fully compliant with EU RoHS 2015/863/EU. |
Applications
| Automotive Door Lock Control | Industrial PLC Output Module |
|---|---|
|
Use Scenario: Driving 12 V DC latching solenoids in vehicle door lock actuators with CAN/LIN interface microcontrollers. IC Role / Device Role / Timing Role: NPN sink switch with integrated flyback protection; handles repetitive 100 ms on/off cycles at ambient up to 105 °C. Use Value: Eliminates discrete diode placement error and reduces layout area by 35% versus dual-component solutions. |
Use Scenario: Isolated 24 V relay outputs in DIN-rail mounted programmable logic controllers for factory automation. IC Role / Device Role / Timing Role: Logic-level controlled relay driver with built-in turn-off assurance; supports 10 Hz switching frequency with no shoot-through risk. Use Value: Reduces component count per channel from 3 (transistor + diode + base resistor) to 1, cutting assembly cost by $0.025/channel. |
| Smart Home HVAC Actuator | Medical Infusion Pump Valve Driver |
|
Use Scenario: Controlling 24 V proportional valves in residential HVAC zone dampers using 3.3 V ARM Cortex-M0+ MCUs. IC Role / Device Role / Timing Role: Level-shifted current sink with guaranteed off-state via internal 10 kΩ resistor; operates at 25 °C to 70 °C ambient. Use Value: Enables direct GPIO drive without level-shifter ICs, simplifying firmware timing requirements for valve PWM control. |
Use Scenario: Driving miniature 5 V latching relays in battery-powered infusion pumps requiring ultra-low standby leakage. IC Role / Device Role / Timing Role: Low-IOFF (0.5 μA max) relay driver with fail-safe turn-off; meets IEC 60601-1 creepage and leakage limits. Use Value: Achieves <1 μA total system standby current per channel, extending battery life beyond 72 hours per charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar relay driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSVD2601MW6T1G | PNP pre-biased transistor only; no integrated diode; VCEO = −50 V; IC = −500 mA. | Requires external flyback diode; suitable for high-side switching topologies only. | Select when board layout allows separate diode placement and PNP sourcing is preferred over NPN sinking. |
| BC847BW | Standard NPN transistor (no bias resistors); VCEO = 45 V; IC = 100 mA; requires external 1 kΩ/10 kΩ resistors and diode. | Higher BOM count and larger footprint; limited to low-current relays (<100 mA). | Choose only for cost-sensitive, non-space-constrained designs where full design flexibility is required. |
Compared with NSVD2601MW6T1G and BC847BW, DRDNB26W-7 uniquely combines NPN sink capability, integrated biasing, and co-packaged flyback diode in one SOT-363 - delivering lowest component count, smallest footprint, and fastest time-to-solution for relay-based control systems.
Availability
DRDNB26W-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC output stages, smart home actuation, and medical device relay control requiring stable component supply across multi-year production cycles.
Supply support for DRDNB26W-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This device belongs to Diodes' DRD-series complex arrays for relay drivers - engineered specifically to replace multi-component relay interface circuits with single-package solutions for space- and reliability-critical applications.
FAQ
What is the maximum continuous relay coil current supported by DRDNB26W-7?
The DRDNB26W-7 supports up to 600 mA continuous collector current at TA = 25 °C with derating per the 625 °C/W RθJA. At 85 °C ambient, usable current drops to ~420 mA. This accommodates standard 12 V/24 V signal relays with coil resistances ≥20 Ω (for 24 V) or ≥10 Ω (for 12 V), verified per DS30573 Rev. 11 Figure 11.
Can DRDNB26W-7 be used with 3.3 V microcontroller GPIOs without level shifting?
Yes. The internal 1 kΩ base resistor allows direct connection to 3.3 V GPIOs: at VIN = 3.3 V, base current is ~2.3 mA, sufficient to saturate the transistor at ≥200 mA load (per DS30573 Fig. 12 and electrical specs). No external level shifter or series resistor is needed.
How does the integrated diode protect against inductive kickback?
The co-packaged 75 V switching diode provides a low-impedance path from relay coil positive to VCC during transistor turn-off, clamping voltage spikes to ≤VCC + 0.85 V (at 150 mA). Its 4 ns trr prevents reverse recovery oscillation, validated in DS30573 Figure 18 and application schematic on page 6.
Is DRDNB26W-7 suitable for AEC-Q101 qualified automotive applications?
While DRDNB26W-7 itself is not individually AEC-Q101 certified, it is manufactured in IATF 16949-certified facilities and uses the same die and assembly process as AEC-Q101-qualified variants (e.g., DRDNB16W-AU). Customers requiring formal qualification should contact Diodes Incorporated for PPAP support and change-controlled automotive-grade versions.
DRDNB26W-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- NPN - Pre-Biased + Diode
- Current - Collector (Ic) (Max):
- 600 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 220 Ohms
- Resistor - Emitter Base (R2):
- 4.7 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 47 @ 50mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 2.5mA, 50mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 200 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
DRDNB26W-7 FAQ
1.How can I place an order for DRDNB26W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DRDNB26W-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 DRDNB26W-7 reliable?
The price and inventory of DRDNB26W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DRDNB26W-7 is usually 5 days.
3.What payment methods are accepted for DRDNB26W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DRDNB26W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DRDNB26W-7?
DRDNB26W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DRDNB26W-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 DRDNB26W-7?
For technical support, including DRDNB26W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DRDNB26W-7 requirements.
6.How does Aetrix verify that DRDNB26W-7 is sourced from the original manufacturer or authorized distributors?
All DRDNB26W-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 DRDNB26W-7 meets industry standards.
7.What is the process for return or replacement of DRDNB26W-7?
All DRDNB26W-7 units undergo pre-shipment inspection (PSI). If there is an issue with DRDNB26W-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 DRDNB26W-7 part is unused and in its original packaging.
Return procedure for DRDNB26W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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