Nexperia USA Inc. PESD1FLEX,215

Overview

PESD1FLEX from Nexperia is a dual-channel automotive ESD protection diode in SOT23 package, designed specifically for bidirectional transient suppression on FlexRay bus lines. It delivers 23 kV IEC 61000-4-2 contact ESD immunity, 40 V clamping voltage at 1 A, and matched 11–17 pF capacitance per channel with ΔCd/Cd ≤ 0.1%, enabling robust 10 Mbit/s FlexRay data integrity in vehicle networks.

For engineers reviewing the PESD1FLEX datasheet, PESD1FLEX pinout, PESD1FLEX application, or PESD1FLEX equivalent, key selection criteria include differential capacitance matching for signal integrity, common-cathode dual-diode topology for space-constrained FlexRay transceiver interfaces, AEC-Q101 qualification for under-hood deployment, and 200 W peak pulse power handling per line under 8/20 µs surge stress.

Technical Context

The PESD1FLEX integrates two identical, matched avalanche diodes sharing a common cathode (Pin 3), forming a symmetrical bidirectional clamp between each FlexRay line (Pins 1 & 2) and ground. Its structure enables simultaneous protection of RT/2 and BM differential pairs without cross-talk degradation.

It operates within a 24 V reverse standoff range (VRWM), triggers at 25.4–30.3 V breakdown (VBR), and maintains ultra-low 1 nA leakage at VRWM - critical for low-power FlexRay standby modes. The 300 Ω differential resistance ensures minimal insertion loss during normal signal transmission.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 3-terminal, 1.9 mm pitch, 2.9 × 1.3 × 1.0 mm body. RoHS-compliant, halogen-free, and optimized for reflow soldering per IPC-J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel automotive bus ESD protection applications.

Compared with ESD224-B1-W and NUF2114MUTAG, PESD1FLEX uniquely delivers factory-matched capacitance (ΔCd/Cd ≤ 0.1%), common-cathode dual-diode integration in one SOT23, and AEC-Q101 validation - making it the only solution that simultaneously satisfies FlexRay timing, space, and automotive reliability constraints without trade-offs.

Availability

PESD1FLEX is available at Aetrix Electronics and suitable for automotive FlexRay transceiver interfaces, body control modules, ADAS domain controllers, and electric powertrain communication hubs requiring stable component supply across extended production lifecycles.

Supply support for PESD1FLEX 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-performance, reliable, and scalable components for automotive, industrial, and consumer markets.

PESD1FLEX belongs to Nexperia's Automotive ESD Protection portfolio, engineered specifically for high-speed serial bus interfaces including FlexRay, CAN FD, and LIN - emphasizing signal fidelity, AEC-Q101 compliance, and space-efficient dual-channel integration.

FAQ

What is the maximum recommended trace length between PESD1FLEX and the FlexRay connector?

Per Nexperia application guidance, the PCB trace from PESD1FLEX Pin 3 (CC) to ground plane must be ≤2 mm, and traces from Pins 1/2 to protected lines must be ≤3 mm. Longer paths increase inductance, degrading clamping response and risking transceiver damage during 1 ns ESD rise times.

Does PESD1FLEX support bidirectional signal flow on both FlexRay lines simultaneously?

Yes. Its dual-cathode/common-cathode architecture allows independent, symmetrical clamping of positive and negative transients on both RT/2 and BM lines - preserving full-duplex 10 Mbit/s operation without signal inversion or DC blocking.

Can PESD1FLEX be used for CAN FD protection?

No. While electrically compatible for basic ESD suppression, its 24 V VRWM and 40 V VCL exceed CAN FD's typical 12 V supply and ±40 V fault tolerance envelope. Nexperia recommends PESD5V0S1BA for CAN FD due to tighter 5 V clamping and 12 V VRWM.

Is thermal derating required for PESD1FLEX at 125 °C ambient?

Yes. Figure 4 in the datasheet shows PPP drops to ~70% of 200 W at 125 °C junction temperature. For sustained surge events above 85 °C ambient, reduce peak pulse duty cycle or add local copper pour to maintain Tj ≤ 125 °C and retain full 200 W rating.