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Vishay General Semiconductor - Diodes Division SM5S15AHE3/2D
- Part No.:
- SM5S15AHE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S15AHE3/2D.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,329
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Product details
Overview
SM5S15AHE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in 12 V systems. It features a 15.0 V stand-off voltage (VWM), 16.7–18.5 V breakdown range (VBR), 24.4 V clamping voltage at 148 A peak pulse current, and 3600 W peak pulse power (10/1000 µs). Its DO-218AB package supports high-reliability underhood applications up to TJ = 175 °C.
For engineers reviewing the SM5S15AHE3/2D datasheet, SM5S15AHE3/2D pinout, SM5S15AHE3/2D application, or SM5S15AHE3/2D equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, ISO 7637-2 compliance for load dump transients, low leakage (<10 µA at VWM), and thermal resistance of 1.0 °C/W (junction-to-case).
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive electronics to divert surge energy during inductive switching events. Its passivated anisotropic rectifier structure enables stable performance at TJ = 175 °C and low forward voltage drop (≤2.0 V at 100 A), critical for minimizing conduction losses during high-current surges.
The device is optimized for 10/1000 µs and 10/10,000 µs surge waveforms, delivering 3600 W and 2800 W peak pulse power respectively. Its heatsink-is-anode polarity and DO-218AB mechanical design provide robust thermal path management and MSL Level 1 reliability per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15.0 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage threshold for 12 V automotive circuits. |
| VBR (min/max) | 16.7 V / 18.5 V - Breakdown voltage range at 5 mA test current; ensures consistent turn-on behavior across production lots and temperature. |
| VC @ IPPM | 24.4 V at 148 A - Clamping voltage under 10/1000 µs surge; defines worst-case voltage seen by protected ICs during load dump events. |
| PPPM (10/1000 µs) | 3600 W - Peak pulse power handling capability; determines survivability against ISO 7637-2 Pulse 5a/b load dump transients. |
| TJ max. | 175 °C - Maximum junction temperature rating; enables underhood placement without derating in high-ambient environments. |
| RθJC | 1.0 °C/W - Junction-to-case thermal resistance; supports direct mounting to PCB copper pour or metal heatsink for efficient surge energy dissipation. |
| Polarity | Unidirectional - Anode connected to heatsink; requires correct orientation in circuit to protect against positive-going transients only. |
Pinout & Package
Package: DO-218AB - Surface-mount, thermally enhanced case with integral metal heatsink (anode terminal); meets UL 94 V-0, MSL Level 1, and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (cathode) | Transient current sink | Connected to protected line (e.g., battery rail); carries full surge current during clamping event. |
| Lead 2 / Metal Heatsink (anode) | Reference and thermal path | Must be connected to ground plane or heatsink; serves as primary thermal conduction path and electrical reference node. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance per stress test requirements. |
| Junction passivation | Optimized anisotropic rectifier technology provides stable VBR and low leakage (<10 µA at VWM, TJ = 175 °C) over lifetime. |
| ISO 7637-2 compliant | Meets Pulse 5a/b load dump immunity requirements for 12 V vehicle systems without external series impedance. |
| Low forward voltage drop | ≤2.0 V at 100 A (8.3 ms half-sine) minimizes conduction loss and self-heating during high-current surge events. |
| MSL Level 1 | Rated for reflow soldering up to 245 °C peak, enabling standard SMT assembly without moisture sensitivity concerns. |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protects 12 V supply rails during alternator load dump events (ISO 7637-2 Pulse 5), where voltage spikes exceed 40 V for up to 400 ms. IC Role / Device Role: Unidirectional clamping TVS placed directly across battery input to shunt surge current to ground. Use Value: Limits rail voltage to ≤24.4 V during 148 A transients, preventing damage to downstream DC/DC converters and microcontrollers. |
Use Scenario: Safeguards ECU main power input against transients induced by fuel injector or solenoid switching. IC Role / Device Role: Primary overvoltage clamp on the 12 V input stage, upstream of LDOs and PMICs. Use Value: Ensures reliable operation at TJ = 175 °C ambient while maintaining <10 µA leakage to minimize standby current drain. |
| Body Control Module (BCM) Power Rail | Advanced Driver Assistance Systems (ADAS) Camera Power |
Use Scenario: Shields BCM power inputs from relay coil flyback and motor commutation noise in door/window modules. IC Role / Device Role: Fast-response transient suppressor with 1.0 °C/W RθJC, mounted to internal copper heatsink. Use Value: Delivers 3600 W surge handling without thermal runaway, supporting long-term reliability in cyclic thermal environments. |
Use Scenario: Protects ADAS camera module power input from ignition transients and ESD coupling via harness routing. IC Role / Device Role: AEC-Q101-qualified unidirectional TVS integrated into compact front-end protection network. Use Value: Provides clamping at 24.4 V with minimal capacitance, avoiding signal integrity impact on high-speed video interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/5A (Vishay) | DO-214AC package; lower PPPM (400 W); higher VC (24.4 V same, but at 23.5 A); RθJC ≈ 50 °C/W | Not rated for load dump; suitable only for ESD/light transient suppression in non-automotive contexts | Select SM5S15AHE3/2D when ISO 7637-2 Pulse 5 compliance and 3600 W surge handling are required. |
| TPSMD15A (Texas Instruments) | DO-218AB package; same VWM/VBR/VC specs; AEC-Q101 qualified; PPPM = 3600 W; RθJC = 1.0 °C/W | Functionally identical for load dump; differs in lead finish (NiPdAu vs. matte tin) and tape/reel packaging (750 vs. 1000 pcs/reel) | SM5S15AHE3/2D offers HE3 suffix meeting JESD 201 Class 2 whisker resistance; preferred for high-reliability automotive production. |
Compared with SMAJ15A-E3/5A and TPSMD15A, the SM5S15AHE3/2D uniquely combines DO-218AB thermal performance, 3600 W load dump capability, and JESD 201 Class 2 whisker resistance-making it the optimal choice for underhood automotive modules requiring long-term reliability and zero field failures.
Availability
SM5S15AHE3/2D is available at Aetrix Electronics and suitable for automotive load dump protection, engine control unit (ECU) power input hardening, and body control module (BCM) transient suppression requiring stable component supply across extended temperature ranges and high-volume production cycles.
Supply support for SM5S15AHE3/2D 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 TVS devices with emphasis on automotive, industrial, and power applications.
The SM5SxxA family is engineered specifically for high-energy automotive transients, delivering AEC-Q101-qualified, thermally robust TVS protection in the DO-218AB package for underhood deployment.
FAQ
What is the maximum clamping voltage of the SM5S15AHE3/2D under surge conditions?
The SM5S15AHE3/2D has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 148 A using a 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during standardized load dump events. The SM5S15AHE3/2D maintains this clamping performance across its full operating temperature range.
Is the SM5S15AHE3/2D suitable for bidirectional transient suppression?
No, the SM5S15AHE3/2D is strictly unidirectional - its anode is the metal heatsink and must be connected to ground, while the cathode connects to the protected line. It only clamps positive-going transients above VBR. For bidirectional protection, a separate device such as the SMBJ15CA or dual-diode configuration would be required. The SM5S15AHE3/2D datasheet explicitly states "Available in uni-directional polarity only."
Does the SM5S15AHE3/2D meet AEC-Q101 qualification requirements?
Yes, the SM5S15AHE3/2D is fully AEC-Q101 qualified, as confirmed in the Vishay document 88382 (Revision: 22-Jul-16). This includes stress testing for temperature cycling, high-temperature operating life, humidity bias, and surge endurance - all validated for automotive underhood use. The "HE3" suffix further indicates compliance with JESD 201 Class 2 whisker resistance.
What is the thermal resistance from junction to case (RθJC) for the SM5S15AHE3/2D?
The SM5S15AHE3/2D has a typical thermal resistance of 1.0 °C/W from junction to case (RθJC), as specified in the Thermal Characteristics table of the Vishay datasheet. This low value is enabled by the DO-218AB package's integral metal heatsink and supports effective heat transfer to PCB copper pours or external heatsinks during repetitive or high-energy surge events.
Can the SM5S15AHE3/2D be used in 24 V automotive systems?
No - the SM5S15AHE3/2D is designed for 12 V nominal systems, with a 15.0 V stand-off voltage (VWM) and 16.7–18.5 V breakdown range. Using it in a 24 V system risks premature conduction and thermal failure due to sustained reverse bias near or above VWM. For 24 V applications, Vishay specifies SM5S24AHE3/2D (VWM = 24.0 V) or SM5S26AHE3/2D (VWM = 26.0 V) as appropriate alternatives.
SM5S15AHE3/2D 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM5S15AHE3/2D FAQ
1.How can I place an order for SM5S15AHE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S15AHE3/2D 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 SM5S15AHE3/2D reliable?
The price and inventory of SM5S15AHE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S15AHE3/2D is usually 5 days.
3.What payment methods are accepted for SM5S15AHE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S15AHE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S15AHE3/2D?
SM5S15AHE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S15AHE3/2D 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 SM5S15AHE3/2D?
For technical support, including SM5S15AHE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S15AHE3/2D requirements.
6.How does Aetrix verify that SM5S15AHE3/2D is sourced from the original manufacturer or authorized distributors?
All SM5S15AHE3/2D 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 SM5S15AHE3/2D meets industry standards.
7.What is the process for return or replacement of SM5S15AHE3/2D?
All SM5S15AHE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM5S15AHE3/2D, 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 SM5S15AHE3/2D part is unused and in its original packaging.
Return procedure for SM5S15AHE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S15AHE3/2D Tags
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