Vishay General Semiconductor - Diodes Division P6SMB36A-E3/5B

Overview

P6SMB36A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, rated for 36 V standoff voltage (VWM = 30.8 V), 49.9 V clamping voltage at 12.0 A peak pulse current (IPPM), and 600 W peak pulse power with 10/1000 μs waveform. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in industrial and automotive electronics.

For engineers reviewing the P6SMB36A-E3/5B datasheet, P6SMB36A-E3/5B pinout, P6SMB36A-E3/5B application, or P6SMB36A-E3/5B equivalent, this page delivers verified electrical specs, thermal derating behavior, clamping performance under surge conditions, RoHS-compliant packaging details, and AEC-Q101 qualification status for automotive-grade deployment.

Technical Context

The P6SMB36A-E3/5B uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of transient overvoltages before downstream circuitry sustains damage. Its unidirectional polarity features a cathode band marking and operates with reverse-biased clamping during overvoltage events.

Thermal performance is defined by R_θJA = 100 °C/W (junction-to-ambient, on 0.2" × 0.2" copper pads) and R_θJL = 20 °C/W (junction-to-lead), supporting reliable operation up to T_J = +150 °C. Derating curves confirm 50% peak power capability at T_A = 100 °C.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; MSL Level 1 (reflow peak 260 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ36A-E3/5B and 1.5SMC36A, the P6SMB36A-E3/5B uniquely delivers 600 W surge capability in the compact SMB outline while maintaining AEC-Q101 qualification-enabling direct integration into automotive and high-density industrial PCBs without layout or thermal compromise.

Availability

P6SMB36A-E3/5B is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor protection, consumer power adapter design, and telecom line interface applications requiring stable component supply and long-term lifecycle support.

Supply support for P6SMB36A-E3/5B 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

Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.

The P6SMB Series targets high-energy transient suppression in automotive, industrial, and communications systems, delivering standardized 600 W surge capability across a broad voltage range in the compact SMB package.

FAQ

What is the clamping voltage of the P6SMB36A-E3/5B at its rated peak pulse current?

The P6SMB36A-E3/5B has a maximum clamping voltage (V_C) of 49.9 V at its specified peak pulse current (I_PPM) of 12.0 A, measured using the standard 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events. The P6SMB36A-E3/5B maintains this clamping performance with minimal variation due to its stable glass-passivated junction.

Is the P6SMB36A-E3/5B qualified for automotive applications?

Yes, the P6SMB36A-E3/5B is AEC-Q101 qualified when ordered with the "_B" suffix (e.g., P6SMB36AHE3_B), confirming its suitability for automotive electronic systems including engine control units, body electronics, and ADAS sensor interfaces. The base P6SMB36A-E3/5B variant is commercial-grade; AEC-Q101 qualification requires explicit ordering code verification. The P6SMB36A-E3/5B itself meets RoHS and JESD201 Class 2 whisker resistance standards.

What is the standoff voltage (V_WM) of the P6SMB36A-E3/5B, and how does it relate to system operating voltage?

The P6SMB36A-E3/5B has a maximum reverse standoff voltage (V_WM) of 30.8 V, meaning it remains non-conductive under normal operation up to that DC or RMS voltage. For reliable protection, V_WM must exceed the system's maximum steady-state voltage-e.g., 24 V nominal automotive systems (with 28 V float charge) or 28 V industrial supplies. The P6SMB36A-E3/5B provides 2.8 V margin above 28 V, ensuring no leakage or false triggering during normal operation.

Does the P6SMB36A-E3/5B have polarity markings, and how is it oriented on the PCB?

Yes, the P6SMB36A-E3/5B is unidirectional and features a visible cathode band on the SMB package body. During PCB layout, the banded end must connect to the higher-potential node (e.g., V_CC rail or signal line), while the anode connects to ground or lower-potential reference. Incorrect orientation renders the device ineffective for reverse-transient suppression. The P6SMB36A-E3/5B's cathode band aligns with standard SMB mechanical drawings and automated optical inspection (AOI) fiducials.

What thermal derating applies to the P6SMB36A-E3/5B at elevated ambient temperatures?

The P6SMB36A-E3/5B exhibits linear thermal derating above T_A = 25 °C, with peak pulse power (P_PPM) reduced to 50% at T_A = 100 °C per Figure 2 in the datasheet. Its junction-to-ambient thermal resistance (R_θJA) is 100 °C/W on 0.2" × 0.2" copper pads. At T_A = 85 °C, the P6SMB36A-E3/5B retains ~65% of its 600 W rating-approximately 390 W-ensuring continued protection integrity in enclosed industrial enclosures without forced airflow.