NXP Semiconductors BSS83,215

Overview

BSS83,215 from NXP Semiconductors is an N-channel enhancement-mode MOSFET in SOT143B package, rated for 10 V drain-source voltage, 50 mA DC drain current, and 230 mW power dissipation at 25 °C ambient. It features low ON-resistance (≤45 Ω at V_GS = 10 V), integrated back-to-back gate–substrate protection diodes, and sub-ns switching (t_on = 1.0 ns, t_off = 5.0 ns), enabling use as a high-speed analog/digital switch in portable logic interfaces.

For engineers reviewing the BSS83,215 datasheet, BSS83,215 pinout, BSS83,215 application, or BSS83,215 equivalent, key selection criteria include its symmetrical drain/source configuration, gate-threshold range (0.1–2.0 V), ultra-low Crss (0.6 pF), thermal resistance (430 K/W), and suitability for low-voltage, low-power signal routing where fast turn-on/turn-off and low charge injection are critical.

Technical Context

The BSS83,215 operates as a symmetrical, insulated-gate silicon MOSFET with enhancement-mode conduction requiring positive gate bias relative to source/substrate. Its substrate terminal is electrically accessible (Pin 1), enabling body-bias control and facilitating bidirectional switching in analog paths.

It integrates dual anti-parallel zener diodes between gate and substrate (V_Z > 12.5 V), providing inherent ESD protection without external components. The device exhibits strong transconductance (g_fs > 10 mS typ. 15 mS) and low capacitances (C_iss = 1.5 pF, C_oss = 1.0 pF), supporting high-frequency operation up to tens of MHz in small-signal switching applications.

Key Specifications

Pinout & Package

Package: SOT143B - Plastic surface-mounted 4-lead package (3.0 × 1.4 × 1.1 mm), optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel MOSFET switching applications.

Compared with BSS138,215 and DMN2004LK-7, the BSS83,215 uniquely balances ultra-low capacitance, symmetrical operation, and sub-2 V threshold for precision analog switching-making it irreplaceable in high-fidelity, low-voltage signal routing where charge injection and bandwidth are design-critical.

Availability

BSS83,215 is available at Aetrix Electronics and suitable for USB 2.0 interface isolation, low-voltage logic multiplexing, RF front-end attenuation, and portable audio muting requiring stable component supply across industrial and consumer electronics programs.

Supply support for BSS83,215 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The BSS83,215 belongs to NXP's legacy discrete MOSFET product line, engineered specifically for high-speed, low-voltage analog and digital switching in space-constrained portable electronics-prioritizing symmetry, low capacitance, and integrated ESD resilience over power-handling capability.

FAQ

What is the maximum drain-source voltage rating for the BSS83,215?

The BSS83,215 has a maximum drain-source voltage (V_DS) rating of 10 V, as specified in the Absolute Maximum Ratings table. This rating applies under continuous DC conditions and defines the upper limit for safe operation in low-voltage logic and analog signal paths. Exceeding this voltage risks irreversible breakdown, especially given the device's thin-oxide construction. The BSS83,215 is therefore suited for 3.3 V and lower systems, not general-purpose 12 V or 24 V applications.

Is the BSS83,215 pin-compatible with other SOT143 MOSFETs like the BSS123?

No, the BSS83,215 is not pin-compatible with the BSS123. While both use SOT143 packages, the BSS123 uses SOT143 (not SOT143B) with different pin assignments: Pin 1 = Gate, Pin 2 = Drain, Pin 3 = Source, Pin 4 = Substrate. In contrast, the BSS83,215 uses SOT143B with Pin 1 = Substrate, Pin 2 = Source, Pin 3 = Drain, Pin 4 = Gate. Swapping them would reverse gate control and short substrate to incorrect nodes, risking malfunction or damage. Always verify package variant and pinout before substitution.

Does the BSS83,215 support bidirectional current flow?

Yes, the BSS83,215 supports bidirectional current flow due to its symmetrical drain–source construction and accessible substrate terminal. The datasheet explicitly states "Drain and source are interchangeable," and the device functions identically whether current flows from drain to source or source to drain-provided the gate is biased positively relative to the chosen source terminal. This makes the BSS83,215 ideal for transmission gates, analog switches, and AC-coupled signal routing where polarity independence is required.

What is the typical gate-source threshold voltage range for the BSS83,215?

The BSS83,215 has a gate-source threshold voltage (V_GS(th)) range of >0.1 V to <2.0 V, measured at I_D = 1 µA with V_DS = V_GS and V_SB = 0. This wide threshold window ensures reliable turn-on with 1.8 V, 2.5 V, and 3.3 V logic families without external level shifting. At V_GS = 2.0 V, the device delivers usable conduction (R_DS(on) ≈ 120 Ω); full enhancement occurs at ≥3.2 V. This behavior is confirmed in Figure 4 of the BSS83,215 datasheet.

How does the integrated gate protection in the BSS83,215 work?

The BSS83,215 incorporates two back-to-back zener diodes between gate and substrate, each with a breakdown voltage >12.5 V. These diodes clamp transient overvoltages in either polarity, protecting the thin gate oxide from ESD events up to ±10 kV (HBM). Unlike external TVS solutions, this protection is monolithically integrated, eliminating layout parasitics and ensuring consistent response. The diodes do not affect normal operation below ±12.5 V and require no additional external components-making the BSS83,215 inherently robust in handheld and plug-in interface designs.