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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division SM6S24HE3/2D

Name: SM6S24HE3/2D
Brand: Vishay General Semiconductor - Diodes Division
SKU: SM6S24HE3/2D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SM6S24HE3/2D

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-218AB

Datasheet:: SM6S24HE3/2D.pdf

Description:: TVS DIODE 24VWM 43VC DO218AB

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Product details

Overview

SM6S24HE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor diode in DO-218AB package, rated for 24 V standoff voltage (V_WM), 26.7–32.6 V breakdown (V_BR), 43.0 V clamping at 107 A peak pulse current (10/1000 μs), 4600 W peak pulse power, and 175 °C junction temperature - designed for automotive load dump protection in engine control units and body electronics.

For engineers reviewing the SM6S24HE3/2D datasheet, SM6S24HE3/2D pinout, SM6S24HE3/2D application, or SM6S24HE3/2D equivalent, key selection criteria include unidirectional polarity, DO-218AB thermal performance (R_θJC = 0.95 °C/W), AEC-Q101 qualification, ISO7637-2 compliance, and 10 μA max reverse leakage at 24 V and 25 °C.

Technical Context

The SM6S24HE3/2D operates as a unidirectional TVS diode with anode-connected metal heatsink, optimized for high-energy transients using passivated anisotropic rectifier technology. Its 175 °C maximum junction temperature and MSL Level 1 rating support under-hood automotive deployment without derating penalties up to 150 °C case temperature.

It delivers 4600 W surge capability per 10/1000 μs waveform and maintains low forward voltage drop (≤1.9 V at 100 A) during surge events, enabling robust clamping in 12 V automotive systems subject to load dump and inductive switching transients per ISO7637-2.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	24.0 V - Maximum continuous reverse operating voltage before conduction begins; sets system-level overvoltage trip threshold.
V_BR (min/max)	26.7 V / 32.6 V at 5 mA - Confirmed breakdown range ensures reliable turn-on margin above V_WM while avoiding false triggering.
V_C @ I_PPM	43.0 V at 107 A (10/1000 μs) - Clamping voltage defines worst-case voltage seen by protected ICs during surge.
P_PPM	4600 W (10/1000 μs) - Peak surge energy handling capacity validated for automotive load dump waveforms.
I_FSM	600 A (8.3 ms half-sine) - Surge current rating supports repeated inductive switching events without degradation.
T_J max	175 °C - Enables operation in high-temperature engine bay environments without thermal shutdown or parameter drift.
R_θJC	0.95 °C/W - Low thermal resistance allows efficient heat transfer to PCB copper or external heatsink for sustained power dissipation.

Pinout & Package

Package: DO-218AB - Surface-mount, anode-connected metal heatsink case with matte tin-plated leads; meets UL 94 V-0, J-STD-002 solderability, and JESD 201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Lead 1	Cathode	Connected to protected circuit's positive rail; conducts surge current to ground path when clamped.
Lead 2 / Metal Heatsink	Anode	Electrically and thermally connected to system ground; serves as primary thermal interface and return path.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan.
Junction passivation	Passivated anisotropic rectifier structure ensures stable V_BR and low leakage across 175 °C life cycle.
ISO7637-2 compliance	Tested to withstand load dump pulses (10 ms exponential) up to 3600 W at elevated case temperatures.
MSL Level 1	Reflow-compatible up to 245 °C peak without popcorn or delamination; no floor life limitation pre-bake.
Low I_D @ V_WM	≤10 μA at 24 V and 25 °C - minimizes standby power loss in always-on vehicle modules.

Applications

Engine Control Unit (ECU) Power Input Protection	Body Control Module (BCM) LIN Bus Line Protection
Use Scenario: Protects 12 V supply rail of engine control units against alternator load dump transients (up to +40 V, 100 ms). IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery input and DC/DC converter input stage. Use Value: Clamps surge to ≤43.0 V within nanoseconds, preventing damage to downstream PMICs and microcontrollers rated for 36 V absolute max.	Use Scenario: Shields LIN transceiver data lines from coupled transients induced by nearby solenoid actuation in door modules. IC Role / Device Role / Timing Role: Bidirectionally referenced but unidirectional TVS tied to LIN bus V_BAT rail to absorb positive-going spikes. Use Value: Maintains <10 μA leakage at 12 V, preserving LIN bus bias integrity and ensuring <1 μs response to 100 V/μs transients.
Automotive Lighting Driver Supply Protection	Start-Stop System Battery Monitoring Circuit
Use Scenario: Safeguards LED driver ICs in headlamp modules exposed to ignition coil coupling and relay bounce during cold cranking. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V input rail upstream of buck controller. Use Value: Withstands 600 A non-repetitive surge (8.3 ms) without parametric shift, supporting ASIL-B functional safety requirements.	Use Scenario: Protects precision voltage reference and ADC inputs in battery sensor ICs during regenerative braking voltage spikes. IC Role / Device Role / Timing Role: Low-leakage TVS on measurement rail to prevent ADC saturation during 24–36 V transients. Use Value: Delivers 0.95 °C/W thermal resistance to maintain reference stability under 150 °C under-hood ambient conditions.

Engine Control Unit (ECU) Power Input Protection

Body Control Module (BCM) LIN Bus Line Protection

Use Scenario: Protects 12 V supply rail of engine control units against alternator load dump transients (up to +40 V, 100 ms).

IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery input and DC/DC converter input stage.

Use Value: Clamps surge to ≤43.0 V within nanoseconds, preventing damage to downstream PMICs and microcontrollers rated for 36 V absolute max.

Use Scenario: Shields LIN transceiver data lines from coupled transients induced by nearby solenoid actuation in door modules.

IC Role / Device Role / Timing Role: Bidirectionally referenced but unidirectional TVS tied to LIN bus V_BAT rail to absorb positive-going spikes.

Use Value: Maintains <10 μA leakage at 12 V, preserving LIN bus bias integrity and ensuring <1 μs response to 100 V/μs transients.

Automotive Lighting Driver Supply Protection

Start-Stop System Battery Monitoring Circuit

Use Scenario: Safeguards LED driver ICs in headlamp modules exposed to ignition coil coupling and relay bounce during cold cranking.

IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V input rail upstream of buck controller.

Use Value: Withstands 600 A non-repetitive surge (8.3 ms) without parametric shift, supporting ASIL-B functional safety requirements.

Use Scenario: Protects precision voltage reference and ADC inputs in battery sensor ICs during regenerative braking voltage spikes.

IC Role / Device Role / Timing Role: Low-leakage TVS on measurement rail to prevent ADC saturation during 24–36 V transients.

Use Value: Delivers 0.95 °C/W thermal resistance to maintain reference stability under 150 °C under-hood ambient conditions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional TVS diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ24AHE3/A	DO-214AC package; lower P_PPM (400 W); V_C = 38.9 V @ 10.3 A; R_θJC = 40 °C/W	Limited to low-energy surges; unsuitable for load dump; requires larger PCB copper area for thermal management	Select only for cost-sensitive non-automotive applications with <500 W surge exposure.
TPSMD24	DO-218AB package; same P_PPM (4600 W); V_BR = 26.7–29.5 V; V_C = 38.9 V @ 118 A; AEC-Q101 qualified	Lower clamping voltage improves protection margin for 24 V-rated ICs; identical thermal and mechanical fit	Preferred where tighter clamping (<39 V) is required without layout change; verified drop-in replacement per TI documentation.

Compared with SMAJ24AHE3/A and TPSMD24, the SM6S24HE3/2D offers superior thermal performance (0.95 vs. 40 °C/W) and higher surge current tolerance (107 vs. 10.3 A), making it uniquely suited for high-reliability automotive load dump protection where thermal runaway must be avoided.

Availability

SM6S24HE3/2D is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and start-stop system battery monitoring circuits requiring stable component supply, AEC-Q101 compliance, and high-temperature surge resilience.

Supply support for SM6S24HE3/2D 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, MOSFETs, optoelectronics, and passive components with emphasis on automotive, industrial, and computing applications.

The SM6S24HE3/2D belongs to Vishay's PAR® TVS family, engineered specifically for high-energy transient suppression in harsh automotive environments - prioritizing thermal robustness, AEC-Q101 reliability, and ISO7637-2 compliance over general-purpose surge protection.

FAQ

What is the clamping voltage of the SM6S24HE3/2D at its rated peak pulse current?

The SM6S24HE3/2D has a maximum clamping voltage (V_C) of 43.0 V at 107 A peak pulse current with a 10/1000 μs waveform, as specified in the Vishay datasheet (Document Number: 88384). This value defines the upper voltage limit imposed on protected circuitry during surge events and is measured under standardized test conditions at T_C = 25 °C. The SM6S24HE3/2D maintains this clamping performance across its full operating temperature range due to its passivated junction design.

Is the SM6S24HE3/2D suitable for automotive load dump protection per ISO7637-2?

Yes, the SM6S24HE3/2D is explicitly rated to meet ISO7637-2 surge requirements for automotive load dump protection, as confirmed in the Vishay datasheet. It delivers 3600 W surge capability under 10/10,000 μs exponential waveform conditions and sustains 4600 W at 10/1000 μs. Its 175 °C junction rating, AEC-Q101 qualification, and DO-218AB thermal design make the SM6S24HE3/2D appropriate for direct integration into engine control unit and body electronics power rails.

What is the polarity configuration of the SM6S24HE3/2D and how is it implemented physically?

The SM6S24HE3/2D is a unidirectional TVS diode with anode connected to the metal heatsink (Lead 2) and cathode at Lead 1. This configuration is fixed and non-reversible; polarity is marked by orientation on the DO-218AB package with the anode heatsink facing the PCB ground plane. The Vishay datasheet confirms "Polarity: heatsink is anode" and specifies that only unidirectional variants are offered in the SM6S24 series - the SM6S24HE3/2D does not support bidirectional operation.

Does the SM6S24HE3/2D require derating at elevated ambient temperatures?

Yes, the SM6S24HE3/2D requires thermal derating above 25 °C case temperature, as shown in Figure 1 (Power Derating Curve) of the Vishay datasheet. Its 6.0 W steady-state power dissipation (P_D) decreases linearly to zero at 175 °C. At 125 °C case temperature, usable P_D drops to approximately 3.2 W. Designers must use the 0.95 °C/W junction-to-case thermal resistance and actual PCB copper area to calculate real-world derating - the SM6S24HE3/2D's low R_θJC enables higher sustained power than smaller-package alternatives.

What packaging and reel configuration is used for the SM6S24HE3/2D?

The SM6S24HE3/2D is supplied in 13" diameter plastic tape and reel format with 750 units per reel, using package code "2D". The anode (metal heatsink) is oriented toward the sprocket hole per Vishay's ordering information. This configuration complies with EIA-481-D standards and supports automated SMT placement. The HE3 suffix indicates RoHS-compliant, AEC-Q101-qualified construction with JESD 201 Class 2 whisker resistance - all verified for the SM6S24HE3/2D part number.

SM6S24HE3/2D Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: DO-218AB

Series:: PAR®

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 24V

Voltage - Breakdown (Min):: 26.7V

Voltage - Clamping (Max) @ Ipp:: 43V

Current - Peak Pulse (10/1000µs):: 107A

Power - Peak Pulse:: 4600W (4.6kW)

Power Line Protection:: No

Applications:: -

Capacitance @ Frequency:: -

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DO-218AB

SM6S24HE3/2D FAQ

1.How can I place an order for SM6S24HE3/2D through Aetrix?

Please submit a Request for Quotation (RFQ) for SM6S24HE3/2D on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SM6S24HE3/2D reliable?

The price and inventory of SM6S24HE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S24HE3/2D is usually 5 days.

3.What payment methods are accepted for SM6S24HE3/2D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S24HE3/2D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SM6S24HE3/2D?

SM6S24HE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SM6S24HE3/2D order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SM6S24HE3/2D?

For technical support, including SM6S24HE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S24HE3/2D requirements.

6.How does Aetrix verify that SM6S24HE3/2D is sourced from the original manufacturer or authorized distributors?

All SM6S24HE3/2D products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SM6S24HE3/2D meets industry standards.

7.What is the process for return or replacement of SM6S24HE3/2D?

All SM6S24HE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM6S24HE3/2D, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SM6S24HE3/2D part is unused and in its original packaging.

Return procedure for SM6S24HE3/2D:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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