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Vishay General Semiconductor - Diodes Division SM5S30HE3/2D
- Part No.:
- SM5S30HE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S30HE3/2D.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,980
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Product details
Overview
SM5S30HE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 30.0 V stand-off voltage (VWM), 33.3–40.7 V breakdown range (VBR), 53.5 V clamping voltage at 67 A peak pulse current, 3600 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SM5S30HE3/2D datasheet, SM5S30HE3/2D pinout, SM5S30HE3/2D application, or SM5S30HE3/2D equivalent, key selection criteria include its DO-218AB package thermal performance (RθJC = 1.0 °C/W), 175 °C junction rating, uni-directional polarity with heatsink-as-anode configuration, and compliance with ISO7637-2 load dump surge testing.
Technical Context
The SM5S30HE3/2D operates as a clamping-type TVS diode in series with the power rail, conducting only during overvoltage transients above its breakdown threshold. Its passivated anisotropic rectifier technology ensures stable leakage (<10 µA at VWM) and low forward voltage drop (≤2.0 V at 100 A).
It is rated for non-repetitive 10/1000 µs surges up to 3600 W and 10/10,000 µs surges up to 2800 W, with thermal derating down to zero power at 150 °C case temperature. The device's MSL Level 1 rating and JESD201 Class 2 whisker resistance support high-reliability reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 33.3 V / 40.7 V - Breakdown occurs within this range at 5 mA test current; defines turn-on threshold tolerance |
| VC @ IPPM | 53.5 V - Clamped voltage at 67 A peak pulse current; determines protected circuit's maximum transient exposure |
| PPPM (10/1000 µs) | 3600 W - Peak surge power handling capability; supports ISO7637-2 Load Dump Pulse 5a/b |
| TJ max | +175 °C - Enables placement near hot engine compartments without derating loss |
| RθJC | 1.0 °C/W - Low thermal resistance enables efficient heat transfer to PCB copper or heatsink |
| Polarity | Uni-directional - Anode connected to heatsink; cathode to protected line; blocks reverse DC but clamps positive transients |
Pinout & Package
Package: DO-218AB - Surface-mount, single-ended, metal heatsink cathode-side package with matte tin-plated leads; meets UL 94 V-0; MSL Level 1; 245 °C reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (Anode) | Anode connection | Connected to ground or low-side reference; must be routed with low-inductance path for effective clamping |
| Lead 2 / Metal Heatsink | Cathode connection | Primary current-carrying terminal and thermal interface; electrically and thermally coupled to PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JEDEC standards |
| Junction passivation | Optimized anisotropic rectifier process reduces parameter drift over lifetime and temperature |
| Low leakage at VWM | ≤10 µA at 30 V and 25 °C - minimizes standby power loss in always-on vehicle systems |
| High surge capability | Withstands 500 A IFSM (8.3 ms half-sine) - handles alternator turn-off spikes without degradation |
| ISO7637-2 compliance | Validated for Pulse 5a (load dump) under specified test conditions - meets OEM system-level requirements |
Applications
| Automotive Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 12 V power inputs of microcontrollers and CAN transceivers against alternator load dump transients during ignition cycling. IC Role / Device Role / Timing Role: Primary clamping TVS on main battery rail; placed upstream of DC-DC converters and LDOs. Use Value: Limits transient voltage to ≤53.5 V, preventing latch-up or gate oxide damage in downstream ICs rated for 40 V absolute maximum. | Use Scenario: Safeguarding LIN bus power supply and window motor driver ICs from inductive kickback during actuator switching. IC Role / Device Role / Timing Role: Rail-level transient suppressor on fused 12 V distribution lines feeding multiple subsystems. Use Value: Withstands repetitive 2800 W (10/10,000 µs) surges typical of door module motor commutation without parametric shift. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Electric Power Steering (EPS) Control Unit |
Use Scenario: Shielding image sensor power rails and serializer interfaces from EMI-coupled transients in front-end camera housings. IC Role / Device Role / Timing Role: Secondary protection stage after fuse and primary LC filter; fast-response clamping element. Use Value: 175 °C operation allows mounting directly on camera PCB near heat-generating ISP, maintaining clamping integrity across full automotive temperature range. | Use Scenario: Securing high-current H-bridge gate drivers and position sensor supplies against battery reversal and load dump in steering column assemblies. IC Role / Device Role / Timing Role: High-energy transient absorber on 12 V input before buck converter; shares thermal mass with heatsinked MOSFETs. Use Value: RθJC = 1.0 °C/W enables direct thermal coupling to shared aluminum heatsink, sustaining 3600 W pulses without exceeding TJ limit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30AHE3/54 | Lower PPPM (400 W), SMA package, bidirectional option available | Not AEC-Q101 qualified; limited to non-automotive industrial use | Select when cost sensitivity outweighs automotive qualification and surge energy requirements |
| TPSMD30HE3/54 | Same DO-218AB package, 30 V VWM, but lower clamping voltage (48.4 V) and 3300 W rating | Also AEC-Q101 qualified; optimized for tighter clamping margin in safety-critical domains | Prefer when lower VC is required to meet stricter downstream IC VDS(max) margins |
Compared with SMAJ30AHE3/54 and TPSMD30HE3/54, the SM5S30HE3/2D delivers higher surge robustness (3600 W vs. 400 W / 3300 W) and is uniquely validated for automotive load dump per ISO7637-2, making it the default choice for under-hood 12 V rail protection where energy absorption and qualification are mandatory.
Availability
SM5S30HE3/2D is available at Aetrix Electronics and suitable for automotive ECU protection, body control modules, ADAS camera power conditioning, and electric power steering systems requiring stable component supply across extended temperature and high-surge environments.
Supply support for SM5S30HE3/2D 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, TVS devices, and optoelectronics with emphasis on reliability and automotive-grade validation.
The SM5Sxx family was engineered specifically for high-energy automotive load dump protection, combining DO-218AB thermal efficiency with AEC-Q101 stress testing to replace older axial-leaded and lower-power SMD TVS solutions.
FAQ
What is the clamping voltage of the SM5S30HE3/2D at its rated peak pulse current?
The SM5S30HE3/2D has a maximum clamping voltage (VC) of 53.5 V at its specified peak pulse current (IPPM) of 67 A under a 10/1000 µs waveform. This value is measured per the standard test condition defined in the Vishay datasheet document 88382 and ensures predictable overvoltage limiting for downstream 40 V-rated ICs in automotive power rails.
Is the SM5S30HE3/2D suitable for bidirectional transient protection?
No, the SM5S30HE3/2D is unidirectional only, with the metal heatsink serving as the cathode and Lead 1 as the anode. It conducts and clamps only positive transients relative to ground. For bidirectional protection, a separate device such as the SM5S30AHE3/2D (with 'A' suffix) must be selected, as confirmed in the electrical characteristics table of the Vishay SM5S10–SM5S36A datasheet.
Does the SM5S30HE3/2D require a heatsink for standard automotive operation?
The SM5S30HE3/2D does not require an external heatsink for single-pulse or infrequent surge events due to its low RθJC of 1.0 °C/W and DO-218AB metal heatsink design. However, sustained high-frequency transients demand adequate PCB copper area (≥1 in²) connected to Lead 2 to maintain TJ ≤175 °C, as shown in Figure 1 of the Vishay datasheet 88382.
What is the maximum reverse leakage current of the SM5S30HE3/2D at 30 V and 25 °C?
The maximum reverse leakage current (ID) of the SM5S30HE3/2D is 10 µA at VWM = 30.0 V and ambient temperature of 25 °C, as specified in the Electrical Characteristics table on page 2 of the Vishay document 88382. At 175 °C junction temperature, leakage remains ≤150 µA, supporting low-power always-on vehicle modules.
How is the polarity configured for PCB layout of the SM5S30HE3/2D?
The SM5S30HE3/2D uses a unidirectional configuration where the metal heatsink (Lead 2) is the cathode and Lead 1 is the anode. In PCB layout, the anode (Lead 1) must connect to ground or the low-side reference plane, while the cathode (heatsink) connects to the protected 12 V rail - ensuring correct conduction direction during positive transients.
SM5S30HE3/2D 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 67A
- 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
SM5S30HE3/2D FAQ
1.How can I place an order for SM5S30HE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S30HE3/2D 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 SM5S30HE3/2D reliable?
The price and inventory of SM5S30HE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S30HE3/2D is usually 5 days.
3.What payment methods are accepted for SM5S30HE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S30HE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S30HE3/2D?
SM5S30HE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S30HE3/2D 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 SM5S30HE3/2D?
For technical support, including SM5S30HE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S30HE3/2D requirements.
6.How does Aetrix verify that SM5S30HE3/2D is sourced from the original manufacturer or authorized distributors?
All SM5S30HE3/2D 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 SM5S30HE3/2D meets industry standards.
7.What is the process for return or replacement of SM5S30HE3/2D?
All SM5S30HE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM5S30HE3/2D, 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 SM5S30HE3/2D part is unused and in its original packaging.
Return procedure for SM5S30HE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S30HE3/2D Tags
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