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Vishay General Semiconductor - Diodes Division SM5S24-E3/2D
- Part No.:
- SM5S24-E3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S24-E3/2D.pdf
- Description:
- TVS DIODE 24VWM 43VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,335
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Product details
Overview
SM5S24-E3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode in DO-218AB package, rated for 24 V stand-off voltage, 43.0 V clamping voltage at 84 A peak pulse current (10/1000 μs), and 3600 W peak pulse power. It operates up to 175 °C junction temperature and is AEC-Q101 qualified for automotive load dump protection.
For engineers reviewing the SM5S24-E3/2D datasheet, SM5S24-E3/2D pinout, SM5S24-E3/2D application, or SM5S24-E3/2D equivalent, key selection criteria include unidirectional polarity, DO-218AB thermal performance (RθJC = 1.0 °C/W), ISO7637-2 compliance, low leakage (<10 μA at VWM), and 500 A IFSM surge rating.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under high-temperature conditions (TJ = 175 °C). Its unidirectional configuration provides forward conduction path during overvoltage events while maintaining low reverse leakage (<10 μA at 24 V).
The DO-218AB package features a metal heatsink terminal (anode) and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Thermal resistance from junction to case is 1.0 °C/W, enabling effective power dissipation on heatsinked PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VC @ IPPM | 43.0 V - Clamped voltage at 84 A peak pulse current (10/1000 μs), defining worst-case voltage seen by protected circuit |
| PPPM (10/1000 μs) | 3600 W - Peak transient power handling capability under standard surge waveform |
| IFSM | 500 A - Single half-sine surge current rating (8.3 ms), critical for load dump survival |
| TJ max. | 175 °C - Maximum junction temperature, enabling use in under-hood automotive environments |
| RθJC | 1.0 °C/W - Junction-to-case thermal resistance, supporting thermal design with external heatsinking |
| ID @ VWM | <10 μA - Low reverse leakage ensures minimal standby power loss in battery-sensitive systems |
Pinout & Package
Package: DO-218AB - Surface-mount, single-ended metal heatsink package with anode connected to heatsink tab and cathode on lead 1. Meets UL 94 V-0 flammability rating and MSL Level 1 (peak reflow 245 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (cathode) | Transient current return path | Connected to protected circuit ground; carries full surge current during clamping |
| Metal heatsink (anode) | Main power/ground reference terminal | Electrically and thermally connected to system ground plane; primary heat dissipation path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics, including temperature cycling, humidity, and mechanical shock testing |
| ISO7637-2 compliance | Meets automotive transient immunity requirements for load dump (Pulse 5a/b) and inductive switching (Pulse 1/2a/3a/3b) |
| 175 °C junction operation | Enables placement near high-temperature components (e.g., power converters, engine control units) without derating |
| Low forward voltage drop | VF ≤ 2.0 V at 100 A (8.3 ms sine), minimizing conduction losses during sustained overvoltage events |
| Junction passivation | Enhanced long-term stability under high-humidity and high-temperature bias stress conditions |
Applications
| Automotive Load Dump Protection | Industrial Power Supply Input Protection |
|---|---|
Use Scenario: Protecting 24 V vehicle ECUs from alternator load dump transients (up to 120 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping transient energy into chassis ground via metal heatsink. Use Value: Withstands 3600 W peak pulse and 500 A IFSM, meeting ISO7637-2 Pulse 5 requirements without degradation at TJ = 175 °C. | Use Scenario: Safeguarding industrial 24 V DC power inputs against inductive switching surges from solenoids or relays. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed upstream of DC-DC converters and microcontrollers. Use Value: 43.0 V clamping voltage ensures downstream 3.3 V/5 V logic remains within absolute maximum ratings during 84 A transients. |
| Telecom Power Interface Protection | Commercial Vehicle Battery Management |
Use Scenario: Shielding PoE-powered equipment front-ends from accidental 24–48 V supply misconnections and line surges. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing fast-rising transients before they reach Ethernet PHY or PMIC. Use Value: 24.0 V VWM allows normal operation across wide input range; <10 μA leakage avoids quiescent current penalty in always-on systems. | Use Scenario: Securing BMS sensors and CAN transceivers in 24 V commercial trucks exposed to harsh electrical environments. IC Role / Device Role / Timing Role: Primary overvoltage protection element mounted directly to metal chassis for lowest-inductance path. Use Value: DO-218AB metal heatsink enables direct thermal coupling to chassis, sustaining repeated 3600 W surges without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5A | DO-214AC package, lower PPPM (400 W), higher VC (38.9 V), bidirectional option available | Limited to lower-energy transients; not rated for ISO7637-2 load dump | Select when space-constrained layout requires smaller footprint and surge demands are below 400 W |
| TPSMD24 | DO-218AB package, same VWM/VC, but lower IFSM (200 A) and no AEC-Q101 qualification | Not suitable for automotive under-hood deployment due to 150 °C TJ limit and non-automotive qualification | Choose for cost-sensitive industrial applications where AEC-Q101 and 175 °C operation are not required |
Compared with SMAJ24A-E3/5A and TPSMD24, the SM5S24-E3/2D delivers 9× higher peak power handling, certified automotive reliability, and superior thermal robustness-making it the only choice for ISO7637-2-compliant 24 V load dump protection in demanding environments.
Availability
SM5S24-E3/2D is available at Aetrix Electronics and suitable for automotive ECU protection, industrial 24 V power interface hardening, and commercial vehicle battery management systems requiring stable component supply and long-term lifecycle support.
Supply support for SM5S24-E3/2D 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, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability and automotive-grade performance.
The SM5Sxx series is designed specifically for high-energy transient suppression in automotive and industrial 24 V systems, combining AEC-Q101 qualification, DO-218AB thermal efficiency, and ISO7637-2 compliance in a single platform.
FAQ
What is the clamping voltage of the SM5S24-E3/2D at its rated peak pulse current?
The SM5S24-E3/2D has a maximum clamping voltage (VC) of 43.0 V at 84 A peak pulse current (10/1000 μs waveform), as specified in the Vishay datasheet Document Number 88382. This value defines the upper voltage limit imposed on protected circuitry during standardized surge events and is measured under controlled test conditions at TA = 25 °C. The SM5S24-E3/2D maintains this clamping performance across its full operating temperature range.
Is the SM5S24-E3/2D suitable for automotive under-hood applications?
Yes, the SM5S24-E3/2D is explicitly qualified to AEC-Q101 and rated for junction temperatures up to 175 °C, making it suitable for under-hood automotive applications such as engine control units and body control modules. Its DO-218AB package provides direct metal heatsink mounting, and it meets ISO7637-2 load dump requirements-key criteria confirmed in the official Vishay SM5S24-E3/2D datasheet.
What does the "-E3/2D" suffix indicate in SM5S24-E3/2D?
The "-E3" suffix denotes RoHS-compliant, matte tin-plated leads meeting J-STD-002 solderability and JESD 22-B102 whisker resistance (Class 2). The "/2D" indicates packaging in 13-inch plastic tape and reel, with 750 units per reel and anode orientation toward the sprocket hole. This ordering code is defined in the Vishay SM5S24-E3/2D datasheet's Ordering Information section.
How does the SM5S24-E3/2D compare to the SM5S24A variant?
The SM5S24-E3/2D is the standard version with breakdown voltage range 26.7–32.6 V and clamping voltage 43.0 V, while SM5S24A has tighter breakdown (26.7–29.5 V) and lower clamping voltage (38.9 V). Both share identical VWM (24.0 V), package (DO-218AB), and AEC-Q101 qualification. The SM5S24-E3/2D offers higher surge margin; SM5S24A provides tighter voltage tolerance for precision-critical designs.
Does the SM5S24-E3/2D require a heatsink for 3600 W pulse handling?
The SM5S24-E3/2D relies on its DO-218AB metal heatsink terminal for thermal management during 3600 W pulses; no external heatsink is required for single-event surge handling. However, PCB layout must provide adequate copper area (e.g., ≥1 in² thermal pad) connected to the metal tab to maintain RθJC = 1.0 °C/W. Continuous power dissipation is limited to 5 W on infinite heatsink, per the SM5S24-E3/2D datasheet's derating curve.
SM5S24-E3/2D 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):
- 84A
- Power - Peak Pulse:
- 3600W (3.6kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM5S24-E3/2D FAQ
1.How can I place an order for SM5S24-E3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S24-E3/2D 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 SM5S24-E3/2D reliable?
The price and inventory of SM5S24-E3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S24-E3/2D is usually 5 days.
3.What payment methods are accepted for SM5S24-E3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S24-E3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S24-E3/2D?
SM5S24-E3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S24-E3/2D 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 SM5S24-E3/2D?
For technical support, including SM5S24-E3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S24-E3/2D requirements.
6.How does Aetrix verify that SM5S24-E3/2D is sourced from the original manufacturer or authorized distributors?
All SM5S24-E3/2D 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 SM5S24-E3/2D meets industry standards.
7.What is the process for return or replacement of SM5S24-E3/2D?
All SM5S24-E3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM5S24-E3/2D, 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 SM5S24-E3/2D part is unused and in its original packaging.
Return procedure for SM5S24-E3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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