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Vishay General Semiconductor - Diodes Division SM5S15A-E3/2D
- Part No.:
- SM5S15A-E3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S15A-E3/2D.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,978
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Product details
Overview
SM5S15A-E3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode in DO-218AB package, designed for automotive load dump protection. It features a 15.0 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 148 A peak pulse current, and 3600 W peak pulse power (10/1000 µs), operating up to TJ = 175 °C.
For engineers reviewing the SM5S15A-E3/2D datasheet, SM5S15A-E3/2D pinout, SM5S15A-E3/2D application, or SM5S15A-E3/2D equivalent, this device is selected for high-reliability 12 V automotive power rail protection where low leakage (<10 µA at VWM), AEC-Q101 qualification, and ISO7637-2 compliance are mandatory.
Technical Context
The SM5S15A-E3/2D operates as a unidirectional avalanche diode with anode-connected heatsink configuration, optimized for fast clamping of load dump transients on 12 V vehicle systems. Its junction passivation and anisotropic rectifier technology enable stable performance at TJ = 175 °C and low forward voltage drop (VF ≤ 2.0 V at 100 A).
It meets MSL Level 1 per J-STD-020 (peak reflow 245 °C), uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and passes JESD 201 Class 2 whisker testing. The DO-218AB case provides UL 94 V-0 flammability rating and 1.0 °C/W typical junction-to-case thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15.0 V - Maximum continuous reverse working voltage before clamping begins; sets system operating margin for 12 V nominal rails. |
| VBR (min/max) | 16.7 V / 18.5 V - Breakdown voltage range at 5 mA test current; defines turn-on threshold consistency across production lots. |
| VC @ IPPM | 24.4 V - Clamped voltage at 148 A (10/1000 µs); determines worst-case overvoltage seen by protected downstream ICs. |
| PPPM (10/1000 µs) | 3600 W - Peak pulse power handling capability; enables robust suppression of ISO7637-2 Load Dump Pulse 5a (12 V systems). |
| ID @ VWM | <10 µA - Reverse leakage at 15.0 V and 25 °C; ensures minimal standby power loss in always-on automotive modules. |
| TJ max | 175 °C - Maximum junction temperature rating; supports under-hood placement without derating in engine control units. |
| RθJC | 1.0 °C/W - Junction-to-case thermal resistance; allows direct heatsink mounting for sustained 5 W power dissipation at TC = 25 °C. |
Pinout & Package
Package: DO-218AB - Surface-mount, single-anode heatsink package with metal tab acting as anode terminal and primary thermal path. Dimensions: 15.4 mm × 9.3 mm × 3.8 mm (L × W × H), anode lead oriented toward sprocket hole in 13″ tape-and-reel delivery (2D code).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Signal-side connection; connects to protected line (e.g., battery feed); carries full surge current during clamping. |
| Lead 2 / Metal Heatsink | Anode | Power ground reference and primary thermal interface; must be soldered to large copper pour for effective heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per stress test requirements. |
| Junction passivation design | Reduces parameter drift and leakage increase over lifetime under high-temperature bias conditions (TJ = 175 °C). |
| Low VF (≤2.0 V @ 100 A) | Minimizes conduction loss and self-heating during high-current surge events, preserving clamping accuracy. |
| Meets ISO7637-2 | Qualified for Load Dump Pulse 5a (12 V systems) and other transients defined in automotive EMC standard. |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 245 °C peak without moisture-induced damage. |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) Battery Interface |
|---|---|
Use Scenario: Protects microcontroller power supply against load dump transients when alternator field coil is disconnected during engine operation. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping positive-going surges on 12 V main rail upstream of DC/DC converters. Use Value: Limits voltage to ≤24.4 V during 3600 W pulses, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies. | Use Scenario: Shields LIN bus transceivers and power management ICs from battery line transients during jump-start or relay switching. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp placed directly at BCM connector entry point. Use Value: Withstands 148 A peak current (10/1000 µs) while maintaining <10 µA leakage to avoid battery drain in sleep mode. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Rail | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Safeguards image sensor and ISP power inputs in rear-view or surround-view cameras exposed to harsh under-vehicle environments. IC Role / Device Role / Timing Role: Primary transient suppressor on 12 V input before buck converter; operates continuously at TJ up to 175 °C. Use Value: AEC-Q101 qualification and 175 °C rating ensure functional safety compliance (ISO 26262 ASIL-B) without derating. | Use Scenario: Protects gate drivers and current sense amplifiers in EPS motor control boards subjected to inductive kickback from H-bridge switching. IC Role / Device Role / Timing Role: High-surge-capability TVS placed at motor driver power input, thermally coupled to chassis ground plane. Use Value: 1.0 °C/W RθJC enables direct heatsink mounting, sustaining repeated 500 A IFSM 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 |
|---|---|---|---|
| SMAJ15A-E3/5B | DO-214AC (SMA) package; lower PPPM (400 W); higher VC (24.4 V same, but at only 12.5 A IPPM) | Not rated for ISO7637-2 load dump; suitable only for ESD and lower-energy transients | Select SMAJ15A-E3/5B only for cost-sensitive non-automotive applications with <500 W surge requirements. |
| TPSMD15A | DO-218AB package; same VWM (15 V); slightly higher VC (25.1 V at 143 A); RoHS-compliant but not AEC-Q101 qualified | Lacks automotive qualification; not validated for temperature cycling or humidity bias per AEC-Q101 | Choose TPSMD15A only for industrial or commercial designs where AEC-Q101 is not mandated. |
Compared with SMAJ15A-E3/5B and TPSMD15A, the SM5S15A-E3/2D delivers 9× higher surge power (3600 W vs. 400 W), maintains identical clamping voltage at 12× higher current, and is the only option qualified to AEC-Q101 and ISO7637-2 - making it the sole choice for production automotive load dump protection.
Availability
SM5S15A-E3/2D is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering applications requiring stable component supply, long-term automotive lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for SM5S15A-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 optoelectronics with emphasis on high-reliability, high-power, and automotive-qualified components.
The SM5SxxA family is engineered specifically for automotive load dump protection, combining high-temperature operation (TJ = 175 °C), AEC-Q101 qualification, and DO-218AB thermal performance to replace older axial-leaded TVS solutions in modern ECU designs.
FAQ
What is the clamping voltage of the SM5S15A-E3/2D at its rated peak pulse current?
The SM5S15A-E3/2D has a maximum clamping voltage (VC) of 24.4 V at 148 A peak pulse current with 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 surge events. The SM5S15A-E3/2D maintains this clamping performance consistently across its qualified temperature range.
Is the SM5S15A-E3/2D suitable for 24 V automotive systems?
No, the SM5S15A-E3/2D is designed for 12 V nominal automotive systems. Its 15.0 V stand-off voltage (VWM) and 16.7–18.5 V breakdown range are optimized for 12 V battery rails. For 24 V systems, Vishay specifies SM5S24A-E3/2D (VWM = 24.0 V) or SM5S28A-E3/2D (VWM = 28.0 V). Using SM5S15A-E3/2D on a 24 V line would cause continuous conduction and failure.
Does the SM5S15A-E3/2D require a heatsink for standard operation?
Yes - the metal heatsink (Lead 2) of the SM5S15A-E3/2D must be soldered to a minimum 100 mm² copper pad to achieve rated 5 W power dissipation at TC = 25 °C. Without adequate copper area, thermal resistance rises above the specified 1.0 °C/W RθJC, causing junction temperature exceedance during sustained surges. The SM5S15A-E3/2D relies on this thermal path for reliability in automotive under-hood environments.
What does the "-E3/2D" suffix indicate in SM5S15A-E3/2D?
The "-E3" suffix denotes RoHS-compliant, matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards, plus JESD 201 Class 2 whisker resistance. The "/2D" indicates packaging in 13″ diameter plastic tape and reel, with 750 units per reel and anode orientation toward the sprocket hole. This full suffix confirms AEC-Q101 qualification and production-ready packaging for automated SMT assembly of the SM5S15A-E3/2D.
How does the SM5S15A-E3/2D meet ISO7637-2 compliance?
The SM5S15A-E3/2D meets ISO7637-2 Pulse 5a (load dump) requirements through its 3600 W peak pulse power rating (10/1000 µs), 148 A IPPM, and 24.4 V clamping voltage - all validated under the standard's defined test conditions. Vishay's datasheet explicitly states compliance "varied by test condition", confirming that the SM5S15A-E3/2D satisfies the specification when applied per recommended layout and thermal design. This makes the SM5S15A-E3/2D suitable for certified automotive ECU designs.
SM5S15A-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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 148A
- 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
SM5S15A-E3/2D FAQ
1.How can I place an order for SM5S15A-E3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S15A-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 SM5S15A-E3/2D reliable?
The price and inventory of SM5S15A-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 SM5S15A-E3/2D is usually 5 days.
3.What payment methods are accepted for SM5S15A-E3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S15A-E3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S15A-E3/2D?
SM5S15A-E3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S15A-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 SM5S15A-E3/2D?
For technical support, including SM5S15A-E3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S15A-E3/2D requirements.
6.How does Aetrix verify that SM5S15A-E3/2D is sourced from the original manufacturer or authorized distributors?
All SM5S15A-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 SM5S15A-E3/2D meets industry standards.
7.What is the process for return or replacement of SM5S15A-E3/2D?
All SM5S15A-E3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM5S15A-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 SM5S15A-E3/2D part is unused and in its original packaging.
Return procedure for SM5S15A-E3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S15A-E3/2D Tags
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