Taiwan Semiconductor Corporation 1.5SMC8.2C

Overview

1.5SMC8.2C from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for ESD and surge protection in DC power rails and signal lines. It features a 8.2V breakdown voltage (min 7.38V, max 9.02V), 1500W peak pulse power rating, 12.5V clamping voltage at 200A, 6.63V working stand-off voltage, and DO-214AB (SMC) package - used in telecom interface protection and industrial I/O circuits.

For engineers reviewing the 1.5SMC8.2C datasheet, 1.5SMC8.2C pinout, 1.5SMC8.2C application, or 1.5SMC8.2C equivalent, key selection criteria include bidirectional clamping performance, low leakage (<1μA @ 6.63V), fast response (<1.0ps), ISO 7637-2 compliance, and thermal robustness (R_θJA = 50°C/W).

Technical Context

The 1.5SMC8.2C implements a silicon avalanche junction structure with glass passivation for stable breakdown and low leakage. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.

It operates across –55°C to +150°C junction temperature range, supports 200A peak impulse current (10/1000μs waveform), and maintains clamping voltage ≤12.5V under full-rated surge - critical for protecting downstream 3.3V/5V logic interfaces.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), surface-mount, bidirectional, cathode band not applicable (symmetrical terminals). Weight: 0.210g. Molding compound meets UL 94V-0.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ8.0CA and 1.5KE8.2C, the 1.5SMC8.2C uniquely combines SMT-compatible DO-214AB packaging, 1500W surge capacity, and bidirectional symmetry - making it optimal for new industrial and automotive PCBs requiring high-density, high-reliability transient protection.

Availability

1.5SMC8.2C is available at Aetrix Electronics and suitable for industrial PLC analog inputs, automotive BCM LIN bus protection, and telecom Ethernet PHY interface applications requiring stable component supply and full ISO 7637-2 compliance.

Supply support for 1.5SMC8.2C 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers, with ISO 9001 and IATF 16949 certification.

The 1.5SMC series was engineered for high-power, surface-mount surge immunity in harsh environments - targeting automotive, industrial automation, and infrastructure equipment where reliability under repetitive transients is mandatory.

FAQ

What does the 'C' suffix indicate in 1.5SMC8.2C?

The 'C' suffix in 1.5SMC8.2C denotes a bidirectional configuration - meaning the device provides symmetrical clamping in both polarities, with identical V_BR, V_C, and I_PPM characteristics regardless of voltage polarity applied. This eliminates the need for polarity-aware placement in AC-coupled or floating circuits, unlike unidirectional variants (e.g., 1.5SMC8.2) which require correct anode/cathode orientation. The 1.5SMC8.2C is explicitly rated for bidirectional use per TSC documentation.

Is 1.5SMC8.2C compliant with automotive surge standards?

Yes, the 1.5SMC8.2C meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling), validated per manufacturer test data. Its 1500W peak power rating and 12.5V clamping voltage at 200A enable direct integration into automotive body control modules, infotainment interfaces, and LIN/CAN node protection without additional filtering. The 1.5SMC8.2C is specified for operation from –55°C to +150°C, satisfying extended temperature requirements for under-hood and cabin applications.

How does the 1.5SMC8.2C compare to 1.5SMC8.2A in terms of breakdown voltage?

The 1.5SMC8.2C has a breakdown voltage range of 7.38V to 9.02V at 10mA test current, while the 1.5SMC8.2A variant tightens this to 7.79V–8.61V. The 'A' suffix indicates tighter V_BR tolerance (±5% vs. ±10% for standard grade), improving consistency in precision clamping applications. Both share identical package (DO-214AB), power rating (1500W), and clamping voltage (12.5V/12.1V respectively), but the 1.5SMC8.2C offers broader V_BR latitude suitable for cost-sensitive industrial designs where exact threshold matching is secondary to surge margin.

Can 1.5SMC8.2C be used in place of a unidirectional TVS like 1.5SMC8.2?

No - the 1.5SMC8.2C is bidirectional and lacks polarity marking, whereas the unidirectional 1.5SMC8.2 requires correct anode-to-ground or cathode-to-ground orientation to function. Substituting 1.5SMC8.2C for 1.5SMC8.2 in a unidirectionally biased circuit may result in unintended conduction during normal operation if reverse voltage exceeds V_WM. The 1.5SMC8.2C should only replace unidirectional parts when the application inherently demands symmetrical clamping, such as AC signal lines, transformer-isolated interfaces, or floating buses.

What is the maximum steady-state power dissipation for 1.5SMC8.2C?

The 1.5SMC8.2C has a steady-state power dissipation (P_D) rating of 6.5W at T_A = 25°C, as specified in the Absolute Maximum Ratings table. This value decreases linearly with ambient temperature above 25°C, following the derating curve in Figure 2 of the datasheet (R_θJA = 50°C/W). Unlike its 1500W peak pulse rating, this 6.5W limit applies only to continuous DC or RMS power - relevant for sustained overvoltage conditions, not transient suppression. For typical surge protection use, the 1.5SMC8.2C operates well below this limit during clamping events.