onsemi FR014H5JZ

Overview

FR014H5JZ from onsemi is a high-side reverse polarity protection IC with integrated TVS, functioning as a low-resistance series power switch for USB and DC-powered systems. It provides −30 V reverse-bias blocking, 14 mΩ typical on-resistance at 5 V/1.5 A, and sub-50 ns response to negative transients - deployed in mobile medical devices and USB 3.0 peripherals to prevent damage from hot-plug errors or reversed battery connections.

For engineers reviewing the FR014H5JZ datasheet, pinout, applications, or equivalent options, this device is selected for its combination of ultra-low forward voltage drop (21 mV @ 1.5 A), integrated overvoltage suppression (30 V clamping), and compact MLP 3.3×3.3 mm package - critical for space-constrained, high-reliability DC input protection.

Technical Context

The FR014H5JZ integrates a MOSFET-based high-side switch with startup diode and bidirectional TVS between NEG and CTL pins. Its control logic uses POS-to-CTL voltage polarity to enable conduction (negative bias) or enter high-impedance state (positive bias), eliminating external gate drive circuitry.

It delivers true reverse-bias blocking down to −30 V with leakage <1 µA at −20 V, while maintaining 32 V 24-hour withstand rating and 8 A continuous input current capability. The integrated TVS exhibits 30 V breakdown (1 mA), 34 V clamping at 0.8 A (8/20 µs), and ±1.5 µA leakage at ±25 V.

Key Specifications

Pinout & Package

FR014H5JZ is housed in an 8-lead WDFN (MLP) 3.3 × 3.3 mm, 0.65 mm pitch package (Case 511DR), with exposed thermal pad for enhanced heat transfer. Pin 1 is marked by top-side dot or notch orientation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar reverse polarity protection applications.

Compared with TPS26631RGER and MAX16050ATA+, the FR014H5JZ uniquely combines nanosecond response, integrated TVS, and USB-compliant inrush control in a 3.3×3.3 mm package - reducing total protection solution size by ≥40% and eliminating two external components.

Availability

FR014H5JZ is available at Aetrix Electronics and suitable for USB 3.0 peripherals, mobile medical devices, and automotive charging ports requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for FR014H5JZ 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

onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The FR014H5JZ belongs to onsemi's Circuit Protection portfolio, engineered specifically for high-reliability DC input protection in portable and USB-connected systems - prioritizing ultra-fast fault response, minimal voltage drop, and integration density.

FAQ

What is the maximum continuous input current rating for FR014H5JZ?

The FR014H5JZ supports 8 A continuous input current at TA = 25°C with proper PCB thermal design (1 in² 2-oz copper). Derating applies above 25°C ambient; at 70°C, maximum continuous current drops to approximately 5.2 A based on its 50 °C/W R_JA and 150°C max junction temperature. The FR014H5JZ must be mounted on thermally optimized land patterns to sustain rated current.

Does FR014H5JZ require an external gate resistor or pull-up/pull-down network?

No. The FR014H5JZ uses internal control logic referenced to the CTL pin and requires no external biasing components. The CTL pin functions as a reference node - not a logic input - and must be connected directly to the load ground (same potential as NEG) for proper operation. Adding resistors or capacitors to CTL will disrupt the turn-on threshold and disable protection functionality of the FR014H5JZ.

Can FR014H5JZ protect against both reverse polarity and positive overvoltage events?

Yes. The FR014H5JZ provides dual protection: −30 V reverse-bias blocking and integrated TVS with 30 V breakdown / 34 V clamping for positive transients. Its TVS is bidirectional between NEG and CTL, suppressing surges from either polarity. However, it does not regulate or clamp steady-state overvoltage above +32 V - that rating defines 24-hour survivability, not continuous operation. For sustained overvoltage, external regulation remains necessary alongside the FR014H5JZ.

How does the startup diode in FR014H5JZ reduce inrush current?

The integrated startup diode conducts during initial power application, limiting dV/dt across the load capacitance via its 0.63 V forward drop. This delays full switch turn-on until VIN reaches ~2.4 V (V_ON), spreading inrush energy over time. In USB 3.0 testing (C2 = 10 µF, R3 = 27 Ω), this reduced peak inrush by 5–20% versus unprotected circuits - directly lowering stress on input capacitors and connectors. The FR014H5JZ's diode is not a bypass path but a controlled startup element.

Is FR014H5JZ compatible with USB Type-C power delivery systems?

The FR014H5JZ is validated for USB 1.0/2.0/3.0 and USB charging applications, but not designed for native USB Type-C PD negotiation or 20 V operation. Its +32 V 24-hour withstand and −30 V reverse rating cover USB-C's 5 V/9 V/15 V modes, but it lacks CC line handling or PD protocol awareness. It may be used downstream of a USB-C PD controller to protect the 5 V rail, provided the PD controller handles voltage selection and the FR014H5JZ is placed after VBUS conditioning - confirming compatibility requires system-level validation of the FR014H5JZ placement.