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Diodes Incorporated BSS138DWK-13
- Part No.:
- BSS138DWK-13
- Manufacturer:
- Diodes Incorporated
- Category:
- FET, MOSFET Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BSS138DWK-13.pdf
- Description:
- MOSFET 2N-CH 50V 0.31A SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:6,118
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Product details
Overview
BSS138DWK-13 from Diodes Incorporated is a dual N-channel enhancement-mode MOSFET in SOT363 package, rated for 50V VDSS, with RDS(ON) of 2.6Ω @ VGS = 10V and 310mA continuous drain current at +25°C. It features ESD-protected gates, low input capacitance (22pF Ciss), and fast switching (tF = 7.3ns), optimized for compact load-switching in portable power management.
For engineers reviewing the BSS138DWK-13 datasheet, BSS138DWK-13 pinout, BSS138DWK-13 application, or BSS138DWK-13 equivalent, key selection criteria include dual-channel RDS(ON) matching at low gate drive (2.5–4.5V), thermal resistance (RθJA = 257°C/W on 2oz copper), and AEC-Q101 readiness for automotive body electronics.
Technical Context
This dual MOSFET integrates two matched N-channel devices sharing no internal connection-each channel operates independently with identical electrical characteristics. Its gate threshold voltage (VGS(TH) = 0.5–1.5V) enables reliable turn-on from 2.5V logic, while low Crss (4pF) minimizes Miller-induced shoot-through in high-speed switching.
The device uses a planar silicon process with annealed matte tin terminals and green molding compound (UL 94V-0). Thermal performance is specified for two PCB conditions: 371°C/W (minimum pad) and 257°C/W (1-inch² 2oz copper), directly supporting design-in for space-constrained DC-DC output stages and USB port protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 50V - supports 24V industrial bus and 36V automotive battery-supplied loads without derating |
| RDS(ON) @ VGS = 4.5V | 3.2Ω - enables ≥90% efficiency in 3.3V/200mA load switches with <100mW conduction loss |
| Ciss | 22pF - reduces gate drive power requirement and speeds up 3.3V GPIO-controlled switching |
| tF | 7.3ns - allows >10MHz PWM operation in active rectification and synchronous buck topologies |
| Qg @ VGS = 4.5V | 0.4nC - permits direct driving from low-current microcontroller I/O pins without buffer stage |
| TJ Range | −55°C to +150°C - qualified for under-hood automotive modules and industrial motor control enclosures |
| RθJA (2oz Cu) | 257°C/W - defines minimum copper area needed to maintain TJ < 125°C at 250mA continuous load |
Pinout & Package
Package: SOT363 - 6-pin, dual-channel, surface-mount plastic package with exposed thermal pad (not electrically connected); dimensions 2.15 × 2.10 × 1.00 mm; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S1 | Source of Channel 1 | Low-side return path for first MOSFET; tied to ground or common source node in dual-load configuration |
| G1 | Gate of Channel 1 | Control input requiring ≤±20V rating; ESD-protected to withstand >2kV HBM |
| D1 | Drain of Channel 1 | Switched high-side output; connects to load anode or DC-DC converter output rail |
| S2 | Source of Channel 2 | Independent source terminal; enables isolated dual-load control without shared source node |
| G2 | Gate of Channel 2 | Second independent control input; electrically isolated from G1 per datasheet schematic |
| D2 | Drain of Channel 2 | Second switched output; supports redundancy or parallel current sharing when used with D1 |
Key Features
| Feature | Design Value |
|---|---|
| Dual matched N-channel topology | Enables space-efficient dual-load switching in single 2.2mm × 2.2mm footprint, eliminating need for two discrete SOT23s |
| Low VGS(TH) (0.5–1.5V) | Guarantees full enhancement with 1.8V/2.5V/3.3V logic families-no level-shifting required in IoT sensor nodes |
| ESD-protected gate (HBM >2kV) | Eliminates external gate-protection diodes in handheld device assembly, reducing BOM count and layout area |
| Halogen- and antimony-free "Green" compound | Meets IPC-1752A Class 1 reporting requirements and EU Directive 2015/863/EU for RoHS 3 compliance |
| Thermal resistance RθJA = 257°C/W | Supports 250mA continuous current on standard FR-4 with 1-inch² copper pour-no thermal vias required |
Applications
| USB Type-C Port Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Dual-path overvoltage/overcurrent protection for reversible USB-C connectors in infotainment head units. IC Role / Device Role / Timing Role: Dual N-MOSFET load switch controlling VBUS and CC line power paths with independent enable control. Use Value: Prevents backfeed between upstream/downstream ports using matched RDS(ON) channels, ensuring <10µs fault response without external controllers. | Use Scenario: Independent switching of LED map lights and HVAC status indicators in door modules. IC Role / Device Role / Timing Role: Dual low-side driver replacing mechanical relays; driven directly by 3.3V CAN transceiver I/O pins. Use Value: Reduces system standby current to <1µA per channel via gate leakage <10µA, meeting ISO 16750-2 quiescent power requirements. |
| Industrial Sensor Node Power Gating | Portable Medical Device Battery Management |
Use Scenario: Selective power-down of analog front-end (AFE) and wireless transceiver subsystems in battery-powered condition monitors. IC Role / Device Role / Timing Role: Dual-channel load switch enabling sequential wake-up: AFE powered first, then radio after stable bias established. Use Value: Achieves 92% efficiency at 200mA with 2.5V gate drive, extending 2000mAh Li-ion runtime by 18 minutes per cycle. | Use Scenario: Isolation of disposable sensor pods from main PCB in handheld glucose meters during pod replacement. IC Role / Device Role / Timing Role: Dual safety switch breaking both power and I²C signal lines simultaneously upon pod removal detection. Use Value: Eliminates risk of hot-plug I²C bus contention using independent channel timing-tD(OFF) = 12.3ns ensures clean break-before-make sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual N-channel load switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMN2041LSD-13 | RDS(ON) = 2.2Ω @ 4.5V (lower), but single-channel SOT23-6; requires two devices for dual function | No integrated dual-channel layout; increases PCB area by 35% and routing complexity | Select if higher current (500mA) per channel is required and board space allows discrete duplication |
| FDMA1023NZ | Same SOT363 package, but RDS(ON) = 3.8Ω @ 4.5V (higher) and no specified ESD rating | Lacks documented HBM ESD protection-requires external TVS for handheld medical use | Choose only for cost-sensitive non-portable industrial controls where gate robustness is secondary |
Compared with DMN2041LSD-13 and FDMA1023NZ, BSS138DWK-13 uniquely delivers matched dual-channel performance in minimal footprint with guaranteed ESD protection and automotive-grade thermal specs-critical for USB-C and medical pod isolation where reliability and size are co-constrained.
Availability
BSS138DWK-13 is available at Aetrix Electronics and suitable for USB-C port protection, automotive body control modules, industrial sensor node power gating, and portable medical device battery management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BSS138DWK-13 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 the Americas.
The BSS138DWK belongs to Diodes' high-efficiency small-signal MOSFET product line, engineered specifically for space-constrained load-switching in battery-powered and automotive electronics where low gate charge and thermal robustness are mandatory.
FAQ
Is BSS138DWK-13 pin-compatible with the single-channel BSS138?
No. BSS138DWK-13 is a dual-channel SOT363 device with six pins (S1/G1/D1/S2/G2/D2), whereas the single-channel BSS138 uses SOT23-3 (G/D/S). Pin mapping, footprint, and channel count differ fundamentally-no mechanical or electrical interchangeability exists without PCB redesign.
Does BSS138DWK-13 support 1.8V logic-level gate drive?
Yes. With VGS(TH) as low as 0.5V and RDS(ON) = 5.2Ω @ VGS = 2.5V, the device fully enhances at 1.8V gate drive in typical operating conditions. Measured transfer curves (Figure 2) confirm usable ID >100mA at VGS = 1.8V and VDS = 5V, making it suitable for ultra-low-voltage microcontrollers.
What is the maximum safe continuous current per channel at +85°C ambient?
At TA = +85°C, derated continuous drain current is 250mA per channel (per Maximum Ratings table, Note 6). This assumes mounting on FR-4 with 2oz copper and 1-inch² thermal pad. Exceeding this requires thermal simulation or measurement to ensure TJ remains ≤150°C.
Can BSS138DWK-13 be used in linear (analog) mode for current regulation?
No. The device is characterized and qualified only for switching operation. Its Safe Operating Area (SOA) curve (Figure 12) shows no DC linear region beyond 10ms pulses, and RDS(ON) variation with temperature (Figure 7) introduces instability in analog feedback loops-use dedicated current-source ICs instead.
BSS138DWK-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- MOSFET (Metal Oxide)
- Configuration:
- 2 N-Channel (Dual)
- FET Feature:
- -
- Drain to Source Voltage (Vdss):
- 50V
- Current - Continuous Drain (Id) @ 25°C:
- 310mA (Ta)
- Rds On (Max) @ Id, Vgs:
- 2.6Ohm @ 200mA, 10V
- Vgs(th) (Max) @ Id:
- 1.5V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 0.8nC @ 10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 22pF @ 25V
- Power - Max:
- 330mW
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
BSS138DWK-13 FAQ
1.How can I place an order for BSS138DWK-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for BSS138DWK-13 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 BSS138DWK-13 reliable?
The price and inventory of BSS138DWK-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BSS138DWK-13 is usually 5 days.
3.What payment methods are accepted for BSS138DWK-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BSS138DWK-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BSS138DWK-13?
BSS138DWK-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BSS138DWK-13 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 BSS138DWK-13?
For technical support, including BSS138DWK-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BSS138DWK-13 requirements.
6.How does Aetrix verify that BSS138DWK-13 is sourced from the original manufacturer or authorized distributors?
All BSS138DWK-13 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 BSS138DWK-13 meets industry standards.
7.What is the process for return or replacement of BSS138DWK-13?
All BSS138DWK-13 units undergo pre-shipment inspection (PSI). If there is an issue with BSS138DWK-13, 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 BSS138DWK-13 part is unused and in its original packaging.
Return procedure for BSS138DWK-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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