Taiwan Semiconductor Corporation SMB10J15CAH

Overview

SMB10J15CAH from Taiwan Semiconductor is a bidirectional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 15V standoff voltage (VWM), 16.7–18.5V breakdown voltage (VBR @ 1mA), and 24.4V clamping voltage (VC @ 41A). It delivers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and 175°C max junction temperature for automotive power line protection.

For engineers reviewing the SMB10J15CAH datasheet, SMB10J15CAH pinout, SMB10J15CAH application, or SMB10J15CAH equivalent, key selection criteria include bidirectional clamping capability, 1000W peak pulse power rating at 1ms, low leakage (<1µA @ 15V), and DO-214AA mechanical compatibility with automated SMT assembly.

Technical Context

This bidirectional TVS diode uses a glass-passivated silicon junction to provide symmetrical reverse/forward clamping without polarity dependence. Its fast response time (<1.0ps) enables suppression of ESD and electrical fast transients before sensitive downstream circuitry sustains damage.

The device operates across –55°C to +175°C junction temperature range and features 20°C/W junction-to-lead thermal resistance. It meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, supporting reflow soldering without preconditioning.

Key Specifications

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode band marking on one end; bidirectional configuration means both terminals are functionally identical-no anode/cathode distinction required in circuit layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ15CA and SMCJ15CA, SMB10J15CAH uniquely delivers 1000W surge capability in the compact DO-214AA outline, enabling AEC-Q101-compliant protection in tight automotive ECUs without thermal or board-area penalties.

Availability

SMB10J15CAH is available at Aetrix Electronics and suitable for automotive power line protection, LED lighting surge suppression, industrial sensor interface protection, and consumer appliance motor control requiring stable component supply and full AEC-Q101 traceability.

Supply support for SMB10J15CAH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving automotive, industrial, and consumer markets since 1979.

The SMB10JxxCAH series belongs to TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for robust transient immunity in 12V/24V automotive subsystems-including body control modules, lighting, and infotainment power rails.

FAQ

What does the "CAH" suffix indicate in SMB10J15CAH?

The "CAH" suffix denotes a bidirectional TVS diode in DO-214AA (SMB) package with AEC-Q101 qualification and halogen-free construction. Unlike "AH" variants (unidirectional), SMB10J15CAH provides symmetrical clamping for both positive and negative transients without requiring polarity-aware PCB layout. This makes SMB10J15CAH ideal for differential or AC-coupled signal lines and ungrounded power domains.

How does SMB10J15CAH meet ISO 7637-2 Pulse 1 requirements?

SMB10J15CAH withstands ISO 7637-2 Pulse 1 (inductive load dump) by clamping 1000W transients at 24.4V for up to 1ms. Its 16.7–18.5V VBR ensures rapid turn-on before downstream ICs exceed their absolute maximum ratings, while its 175°C TJ max allows sustained operation in engine bay environments. The SMB10J15CAH's validated performance eliminates need for external series impedance in most 12V automotive designs.

Is SMB10J15CAH compatible with lead-free reflow soldering processes?

Yes, SMB10J15CAH is fully compatible with lead-free reflow soldering per J-STD-020. Its Matte tin-plated leads meet solderability requirements, and its MSL Level 1 rating means it can be placed directly from tape-and-reel without baking-even after extended storage. The DO-214AA package's thermal mass and 20°C/W RθJL allow efficient heat transfer during reflow, preventing die damage or delamination.

What is the maximum steady-state power dissipation for SMB10J15CAH?

The maximum steady-state power dissipation (PD) for SMB10J15CAH is 5W at TA = 25°C, derated linearly above that ambient temperature. This rating applies only to continuous DC or low-frequency reverse bias conditions-not transient suppression. In normal operation, SMB10J15CAH draws <1µA leakage at 15V, resulting in negligible static power loss. Its 1000W PPK rating is strictly for short-duration (≤1ms) pulses.

Can SMB10J15CAH replace unidirectional SMB10J15AH in existing designs?

SMB10J15CAH can replace SMB10J15AH only if the circuit requires bidirectional clamping and the PCB layout accommodates symmetrical terminal placement. While both share identical VWM, VBR, and VC specs, SMB10J15AH has polarity marking and unidirectional behavior-making it unsuitable for AC or floating-rail applications. Swapping requires verification that reverse conduction won't interfere with upstream regulators or FETs. SMB10J15CAH is not a drop-in replacement unless the original design already assumes bidirectional protection.