Nexperia USA Inc. NPS3102BGBJ

Overview

NPS3102BGBJ from Nexperia is a 12 V, 17 mΩ, auto-retry electronic fuse (eFuse) with programmable current limit (2 A to 13.5 A), integrated overvoltage clamp (15 V), and thermal shutdown protection. It functions as a smart power switch in high-reliability 12 V rail protection, delivering precise load current monitoring via ILIM pin voltage and controlled output slew rate via external dVdt capacitor. Used in SSDs, hot-swap modules, and server power distribution.

For engineers reviewing the NPS3102BGBJ datasheet, NPS3102BGBJ pinout, NPS3102BGBJ application, or NPS3102BGBJ equivalent, key selection criteria include adjustable current limiting range, auto-retry thermal recovery behavior, 2 µs short-circuit response, DFN3030-10 package thermal performance, and EN/FLT bidirectional fault signaling capability.

Technical Context

The NPS3102BGBJ integrates a low-R_ON (17 mΩ typ.) NMOS pass FET with charge-pump gate drive, UVLO (8.4 V rising threshold), and dual-mode protection logic: fast overvoltage clamping (5 µs response) and hysteretic current limiting (20 µs overload response). Its EN/FLT pin implements three-state voltage-level signaling (VIPU = 2.35 V, VFAULT = 0.9 V, VIL = 0.4 V) for enable control and fault reporting without external pull-ups.

Thermal management uses junction temperature sensing with 185 °C shutdown threshold and 30 °C hysteresis; unlike the latch-off NPS3102A, the B variant autonomously retries after cooldown (t_{TSD_ARI} = 2 ms), enabling unattended recovery in fan control or distributed power systems. Output slew rate is actively regulated by comparing dVdt pin voltage against scaled V_OUT, not open-loop RC timing.

Key Specifications

Pinout & Package

Package: DFN3030-10 (SOT8037-1), 3.0 × 3.0 × 0.75 mm, leadless plastic, 10-terminal exposed pad for thermal dissipation (R_θJA = 38 °C/W on 4-layer board).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar eFuse applications.

Compared with BTS50080-1TAD, NPS3102BGBJ offers superior thermal efficiency and analog programmability; versus TPS25982L, it eliminates software dependencies and reduces PCB area by 45%, making it optimal for resource-constrained embedded power nodes.

Availability

NPS3102BGBJ is available at Aetrix Electronics and suitable for server power distribution, SSD protection, fan control, and hot-swap board applications requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for NPS3102BGBJ 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

Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-volume, high-reliability components for automotive, industrial, and computing markets with ISO/TS 16949 and IATF 16949 certification.

The NPS3102 series belongs to Nexperia's eFuse product line, engineered specifically for robust 12 V power rail protection in datacenter and storage systems where autonomous fault recovery and minimal conduction loss are mandatory.

FAQ

What is the minimum recommended capacitor value for the dVdt pin?

The datasheet specifies a minimum 4.7 nF capacitor at the dVdt pin to ensure stable slew rate control. Using less than this value risks uncontrolled output voltage rise, potentially exceeding inrush current limits of downstream loads. NP0/C0G dielectrics rated ≥6.3 V are preferred to maintain capacitance stability under DC bias.

How does the ILIM pin provide real-time current monitoring?

The ILIM pin sources a current proportional to load current (G_IMON = 203 µA/A typ.), which develops a voltage across the external RLIM resistor. This voltage (V_ILIM = I_LOAD × G_IMON × R_LIM) is directly measurable by an ADC, enabling closed-loop current telemetry without adding a separate sense resistor or amplifier.

Can NPS3102BGBJ be paralleled with other eFuses?

Yes-up to three NPS3102 devices can be paralleled using shared IN, OUT, GND, dVdt, and EN/FLT connections. The EN/FLT pin's bidirectional behavior allows one device in thermal shutdown to pull the common node to VFAULT (0.9 V), signaling all others to disable simultaneously when monitored by an external open-drain controller.

What happens if the ILIM pin is left unconnected?

If the ILIM pin is left floating (open), the internal current mirror is disabled and the device blocks all output current-effectively acting as a safety interlock. This fail-safe behavior prevents unintended operation when current limit programming is omitted, ensuring no power delivery until RLIM is correctly installed.