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BSS138TA
+BOMMOSFET N-CH 50V 200MA SOT23-3
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ManufacturerDiodes Incorporated
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Mfr. Part #BSS138TA
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In Stock5691
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Specifications
| Attribute | Value |
| Supplier | Diodes Incorporated |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Not For New Designs |
| FET Type | N-Channel |
| Technology | MOSFET (Metal Oxide) |
| Drain to Source Voltage (Vdss) | 50 V |
| Current - Continuous Drain(Id) @ 25°C | 200mA (Ta) |
| Drive Voltage(Max Rds On Min Rds On) | 10V |
| Rds On(Max) @ Id Vgs | 3.5Ohm @ 220mA, 10V |
| Vgs(th)(Max) @ Id | 1.5V @ 250µA |
| Vgs(Max) | ±20V |
| Input Capacitance(Ciss)(Max) @ Vds | 50 pF @ 10 V |
| Power Dissipation (Max) | 300mW (Ta) |
| Operating Temperature | -55°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount |
| Supplier Device Package | SOT-23-3 |
Overview
Description
BSS138TA is a small-signal N-channel enhancement-mode MOSFET (SOT-23 package). It’s widely used as a low-voltage switch and as a bidirectional level-shifter in logic circuits (notably I2C).
Key points:
- Channel: N-channel MOSFET; conducts when Vgs exceeds the threshold.
- Typical use: switching or as part of bidirectional level shifters; common on breadboards and compact circuits.
- Electricals (vendor variants vary): Vds around 50 V; Id roughly 180 mA; Rds(on) about 3–7 Ω at Vgs ≈ 4.5 V; Vgs(th) ~ 0.8–1.5 V.
- Intrinsic diode: body diode from drain to source.
- TA suffix: a manufacturer-specific variant (often related to packaging or lot); always check the exact datasheet for your part.
In short, BSS138TA is a versatile, low-power MOSFET ideal for small-signal switching and simple level-shift tasks in compact designs.
Key points:
- Channel: N-channel MOSFET; conducts when Vgs exceeds the threshold.
- Typical use: switching or as part of bidirectional level shifters; common on breadboards and compact circuits.
- Electricals (vendor variants vary): Vds around 50 V; Id roughly 180 mA; Rds(on) about 3–7 Ω at Vgs ≈ 4.5 V; Vgs(th) ~ 0.8–1.5 V.
- Intrinsic diode: body diode from drain to source.
- TA suffix: a manufacturer-specific variant (often related to packaging or lot); always check the exact datasheet for your part.
In short, BSS138TA is a versatile, low-power MOSFET ideal for small-signal switching and simple level-shift tasks in compact designs.
Equivalent
Common drop-in equivalents to Nexperia’s BSS138TA (logic-level N-channel MOSFET, SOT-23) include:
• ON Semi/Fairchild 2N7002 or FDN306P
• Vishay SI2301
• Diodes Inc DMG2305UX
• IR (IRLML6344)
• Infineon BSC301N
• STMicro BSS138L
All share similar VDS (≈50 V), VGS(th) and RDS(on) specs.
• ON Semi/Fairchild 2N7002 or FDN306P
• Vishay SI2301
• Diodes Inc DMG2305UX
• IR (IRLML6344)
• Infineon BSC301N
• STMicro BSS138L
All share similar VDS (≈50 V), VGS(th) and RDS(on) specs.
Features
BSS138TA features:
- N-channel enhancement-mode MOSFET
- VDS: 50 V; ID: ~0.18–0.20 A
- On-resistance: ~3.5 Ω (typ) at VGS ≈ 4.5 V (higher with lower gate drive)
- Gate threshold: ~0.8–2.0 V (logic-level)
- Low gate charge; fast switching
- Body diode from drain to source
- Package: SOT-23; TA indicates Tape & Reel packaging
- RoHS compliant
- Applications: bidirectional level shifting (I2C/logic level), load switching, and other small-signal switching tasks
- N-channel enhancement-mode MOSFET
- VDS: 50 V; ID: ~0.18–0.20 A
- On-resistance: ~3.5 Ω (typ) at VGS ≈ 4.5 V (higher with lower gate drive)
- Gate threshold: ~0.8–2.0 V (logic-level)
- Low gate charge; fast switching
- Body diode from drain to source
- Package: SOT-23; TA indicates Tape & Reel packaging
- RoHS compliant
- Applications: bidirectional level shifting (I2C/logic level), load switching, and other small-signal switching tasks
Pinout
- Pin count: 3 (SOT-23 package)
- Function: N-channel enhancement-mode MOSFET (logic‑level) used as a small-signal switch; commonly used for bidirectional I2C level shifting and other low-current switching tasks. Pinout (typical): 1 = Gate, 2 = Drain, 3 = Source.
- Function: N-channel enhancement-mode MOSFET (logic‑level) used as a small-signal switch; commonly used for bidirectional I2C level shifting and other low-current switching tasks. Pinout (typical): 1 = Gate, 2 = Drain, 3 = Source.
Manufacturer
Manufacturer: Vishay Siliconix (a brand of Vishay Intertechnology). What kind of company: A global semiconductor and electronic-components manufacturer that designs and produces MOSFETs, diodes, resistors, capacitors, and related devices.
Application
- Bidirectional I2C/open-drain bus level shifting between voltage domains (e.g., 3.3V ↔ 5V).
- General-purpose N-channel MOSFET switch for small loads in MCU/embedded circuits (LEDs, sensors, GPIO interfacing).
- Level-conversion/prototyping in mixed-voltage portable/embedded systems.
- Small-signal switching where low gate drive is available and space is limited.
- General-purpose N-channel MOSFET switch for small loads in MCU/embedded circuits (LEDs, sensors, GPIO interfacing).
- Level-conversion/prototyping in mixed-voltage portable/embedded systems.
- Small-signal switching where low gate drive is available and space is limited.
Package
The BSS138TA is supplied in a SOT-23 (TO-236AB) 3-pin surface-mount package.
