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Vishay General Semiconductor - Diodes Division SM5S24AHE3_A/I
- Part No.:
- SM5S24AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S24AHE3_A/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,989
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Product details
Overview
SM5S24AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 24.0 V stand-off voltage (VWM), 28.1 V nominal breakdown voltage (VBR), 3600 W peak pulse power (10/1000 μs), 93 V maximum clamping voltage at 150 A, and AEC-Q101 qualification for under-hood automotive applications.
For engineers reviewing the SM5S24AHE3_A/I datasheet, SM5S24AHE3_A/I pinout, SM5S24AHE3_A/I application, or SM5S24AHE3_A/I equivalent, key selection criteria include clamping performance under ISO 7637-2 load dump waveforms, TJ = 175 °C operation, DO-218AB package thermal resistance (RθJM = 0.45 °C/W), and unidirectional polarity with heatsink-as-anode configuration.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low leakage (<10 μA at VWM, <15 μA at TJ = 175 °C). Its junction design enables reliable operation up to 175 °C and meets MSL Level 1 per J-STD-020 with 245 °C peak reflow tolerance.
The device delivers 3600 W peak pulse power (10/1000 μs) and 2800 W (10/10 000 μs), with clamping voltage of 93 V at 150 A IPPM. It is rated for 500 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits a VBR temperature coefficient of +0.087 %/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (nom) | 28.1 V - Breakdown voltage at 5 mA test current; defines turn-on threshold under transient stress |
| VC @ IPPM | 93 V - Clamping voltage at 150 A peak pulse current; determines protected circuit's max overvoltage exposure |
| PPPM (10/1000 μs) | 3600 W - Peak transient energy handling capability; critical for ISO 7637-2 load dump compliance |
| TJ max | +175 °C - Maximum junction temperature; enables placement near hot engine components |
| RθJM | 0.45 °C/W - Junction-to-mount thermal resistance; supports direct heatsink mounting for high-power dissipation |
| Polarity | Unidirectional - Anode connected to heatsink; blocks reverse voltage, conducts forward surges to ground |
Pinout & Package
Package: DO-218AB - Surface-mount, thermally enhanced case with metal heatsink acting as anode terminal; UL 94 V-0 molding compound; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (Anode) | Anode connection | Electrically tied to metal heatsink; must be connected to system ground or low-impedance return path |
| Lead 2 / Metal Heatsink | Anode (primary current path) | Primary thermal and electrical interface; provides low-inductance, high-current conduction path and thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard |
| Junction passivation | Optimized anisotropic rectifier structure reduces leakage drift and improves long-term stability at 175 °C |
| MSL Level 1 | Zero moisture sensitivity; safe for standard SMT reflow without baking (peak 245 °C) |
| ISO 7637-2 compliance | Validated for load dump transients (Pulse 5a/b) in 12 V automotive systems |
| Low clamping ratio (VC/VBR) | 93 V / 28.1 V ≈ 3.31 - Enables robust protection margin for 24 V rail electronics |
Applications
| Automotive Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Protection against alternator load dump transients during battery disconnect in 24 V commercial vehicle ECUs. IC Role / Device Role / Timing Role: Primary clamping device on main 24 V input rail, shunting surge energy to chassis ground. Use Value: Limits rail voltage to ≤93 V during 3600 W transients, preventing damage to MCU, CAN transceivers, and power regulators. |
Use Scenario: Input protection for BCM power supply feeding lighting, window, and door modules in heavy-duty trucks. IC Role / Device Role / Timing Role: Unidirectional TVS placed upstream of DC-DC converters and LDOs. Use Value: Withstands repeated 150 A pulses while maintaining <10 μA leakage at 24 V, ensuring low quiescent current integrity. |
| Commercial Vehicle Telematics Unit | Truck ABS Controller Power Input |
Use Scenario: Surge suppression on OBD-II or cellular modem power lines exposed to cranking and load dump events. IC Role / Device Role / Timing Role: Fast-response clamping element with 10/1000 μs waveform capability. Use Value: Clamps within nanoseconds to 93 V, preserving signal integrity of GPS and LTE interfaces during harsh electrical environments. |
Use Scenario: Protection of ABS controller 24 V input against ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive switch-off). IC Role / Device Role / Timing Role: High-energy TVS mounted directly to metal chassis for minimal loop inductance. Use Value: Leverages RθJM = 0.45 °C/W and 175 °C rating to sustain repeated surges without thermal runaway in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S24AHM3_A/I | Same VWM (24 V), VBR (28.1 V), and DO-218AB package; HM3 suffix indicates updated material formulation and enhanced whisker resistance (JESD 201 Class 2). | Identical functional role; intended as direct replacement for HE3-series in new designs where long-term whisker mitigation is required. | Select SM5S24AHM3_A/I for new designs requiring latest AEC-Q101 revision and improved metallurgical reliability. |
| SMAJ24A | Lower PPPM (400 W vs. 3600 W), SMA package (RθJA ≈ 60 °C/W vs. DO-218AB's 0.45 °C/W), same VWM/VBR but no AEC-Q101 qualification. | Not suitable for load dump; limited to lower-energy ESD and switching transients in non-automotive applications. | Use SMAJ24A only in cost-sensitive industrial or consumer applications with <500 W surge requirements and no automotive qualification mandate. |
Compared with SM5S24AHE3_A/I, SM5S24AHM3_A/I offers identical electrical specs with enhanced process reliability, while SMAJ24A provides basic clamping in a smaller, lower-power package unsuitable for automotive load dump duty.
Availability
SM5S24AHE3_A/I is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and telematics power inputs requiring stable component supply across extended temperature and high-surge environments.
Supply support for SM5S24AHE3_A/I 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SM5SxxA series is part of Vishay's PAR® TVS platform, engineered specifically for high-energy automotive load dump protection with AEC-Q101 qualification and 175 °C junction operation.
FAQ
What is the clamping voltage of SM5S24AHE3_A/I at its rated peak pulse current?
The SM5S24AHE3_A/I has a maximum clamping voltage (VC) of 93 V at 150 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per the conditions specified in the Vishay datasheet (Document Number: 88382) and defines the upper voltage limit imposed on protected circuitry during worst-case transients.
Is SM5S24AHE3_A/I qualified for automotive applications?
Yes, SM5S24AHE3_A/I is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO 7637-2 load dump requirements, operates up to TJ = 175 °C, and is rated for MSL Level 1 reflow compatibility-making it suitable for under-hood ECU and BCM applications.
What does the "HE3" suffix mean in SM5S24AHE3_A/I?
The "HE3" suffix in SM5S24AHE3_A/I denotes RoHS-compliant, halogen-free construction with matte tin-plated leads, AEC-Q101 qualification, and compliance with JESD 201 Class 2 whisker testing. The "A/I" indicates packaging in 13" tape-and-reel with anode orientation toward sprocket holes.
How does the DO-218AB package of SM5S24AHE3_A/I improve thermal performance?
The DO-218AB package of SM5S24AHE3_A/I integrates a metal heatsink as the anode terminal, achieving a junction-to-mount thermal resistance (RθJM) of just 0.45 °C/W. This enables direct mounting to a PCB copper pour or chassis, significantly improving heat dissipation versus standard SMD packages like SMA or SMB.
Can SM5S24AHE3_A/I replace SM5S24AHM3_A/I in existing designs?
SM5S24AHE3_A/I and SM5S24AHM3_A/I share identical electrical specifications and DO-218AB mechanical form factor, but HM3 uses an updated metallurgical process with enhanced whisker resistance (JESD 201 Class 2). While functionally interchangeable, HM3 is preferred for new designs; HE3 remains valid for legacy production where whisker risk is mitigated by other means.
SM5S24AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 93A
- Power - Peak Pulse:
- 3600W (3.6kW)
- 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
SM5S24AHE3_A/I FAQ
1.How can I place an order for SM5S24AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S24AHE3_A/I 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 SM5S24AHE3_A/I reliable?
The price and inventory of SM5S24AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S24AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM5S24AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S24AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S24AHE3_A/I?
SM5S24AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S24AHE3_A/I 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 SM5S24AHE3_A/I?
For technical support, including SM5S24AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S24AHE3_A/I requirements.
6.How does Aetrix verify that SM5S24AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM5S24AHE3_A/I 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 SM5S24AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM5S24AHE3_A/I?
All SM5S24AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S24AHE3_A/I, 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 SM5S24AHE3_A/I part is unused and in its original packaging.
Return procedure for SM5S24AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S24AHE3_A/I Tags
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