Diodes Incorporated 3.0SMCJ8.0CA-13

Overview

3.0SMCJ8.0CA-13 from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features an 8.0 V reverse standoff voltage (VRWM), 13.6 V maximum clamping voltage (VC) at 220.6 A peak pulse current (IPP), and 3000 W peak pulse power dissipation per 10/1000 µs waveform. Used in industrial power supplies, automotive ECUs, and PoE interfaces to safeguard downstream ICs against ESD and lightning-induced transients.

For engineers reviewing the 3.0SMCJ8.0CA-13 datasheet, 3.0SMCJ8.0CA-13 pinout, 3.0SMCJ8.0CA-13 application, or 3.0SMCJ8.0CA-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, VRWM compatibility with operating rail voltage, IEC-61000-4-2 ESD robustness (30 kV air/30 kV contact), and SMC package thermal performance under repetitive surge conditions.

Technical Context

This bi-directional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<50 µA at VRWM), critical for low-power sensor interfaces.

The device complies with IEC-61000-4-2 Level 4 ESD immunity (30 kV air, 30 kV contact) and meets HBM (8 kV), CDM (1 kV), and MM (800 V) standards. Thermal derating follows JEDEC J-STD-020 Level 1 moisture sensitivity, supporting standard reflow profiles without preconditioning.

Key Specifications

Pinout & Package

Package: SMC (DO-214AB), surface-mount, molded plastic body with UL 94V-0 flammability rating; weight ≈ 0.21 g; terminals matte tin-plated for solderability per MIL-STD-202 Method 208.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ8.0CA-13 and 1.5SMC8.0CA, the 3.0SMCJ8.0CA-13 delivers 5× higher surge energy capacity and tighter clamping-critical for protecting 3.3 V/5 V logic in harsh environments where IEC 61000-4-5 compliance is required.

Availability

3.0SMCJ8.0CA-13 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device manufacturing requiring stable component supply across multi-year production cycles.

Supply support for 3.0SMCJ8.0CA-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

This device belongs to Diodes' 3.0SMCJ series of high-power TVS diodes, engineered specifically for robust transient suppression in automotive, industrial, and telecom infrastructure applications demanding AEC-Q200 readiness and high-reliability packaging.

FAQ

What is the difference between "CA" and "A" suffixes in the 3.0SMCJ8.0 part numbering?

The "CA" suffix denotes a bi-directional TVS configuration, meaning it clamps transients of either polarity symmetrically. The "A" suffix indicates uni-directional operation, with a cathode band marking and asymmetric clamping behavior. For 3.0SMCJ8.0CA-13, no polarity marking is present, confirming its bi-directional functionality per datasheet marking code DDR.

Can 3.0SMCJ8.0CA-13 be used to protect a 5 V USB interface?

No-it is not recommended. With a 8.0 V VRWM and 13.6 V clamping voltage, this device would conduct significantly at normal 5 V operation due to insufficient margin above the rail. A TVS with VRWM ≥ 5.5 V and VC ≤ 12 V (e.g., USB-optimized devices like SP1003) is required for reliable 5 V interface protection.

Does this TVS require a heatsink for continuous operation?

No heatsink is required. The device is rated for −55 °C to +150 °C junction temperature and designed for pulsed operation only. Its 5 W average power dissipation rating applies only to very low-duty-cycle surges; steady-state power dissipation must remain near zero, as leakage is <50 µA at 8.0 V.

How does the SMC package compare to SMA or SMB in terms of surge handling?

The SMC (DO-214AB) package offers ~2.5× the thermal mass and PCB copper area capability of SMA (DO-214AC), enabling higher peak pulse current handling. For identical electrical specs, SMC-based TVS devices sustain longer or more energetic transients than SMA/SMB equivalents due to superior heat spreading into the PCB land pattern.