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Vishay General Semiconductor - Diodes Division SM8S30-E3/2D
- Part No.:
- SM8S30-E3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S30-E3/2D.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,651
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Product details
Overview
SM8S30-E3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in high-reliability 12 V and 24 V systems. It features a 30.0 V stand-off voltage (VWM), 53.5 V maximum clamping voltage (VC) at 123 A peak pulse current (IPPM), and 6600 W peak pulse power (10/1000 μs), operating up to TJ = 175 °C.
For engineers reviewing the SM8S30-E3/2D datasheet, SM8S30-E3/2D pinout, SM8S30-E3/2D application, or SM8S30-E3/2D equivalent, key selection criteria include its AEC-Q101 qualification, DO-218AB package thermal performance (RθJC = 0.90 °C/W), ISO7637-2 compliance for load dump transients, and low leakage (<10 μA at VWM).
Technical Context
The SM8S30-E3/2D employs passivated anisotropic rectifier technology optimized for junction stability at TJ = 175 °C, enabling sustained operation in under-hood automotive environments. Its unidirectional polarity and heatsink-as-anode configuration support direct mounting to metal chassis for enhanced thermal dissipation.
It delivers 6600 W surge capability with 10/1000 μs waveform and meets MSL Level 1 per J-STD-020 (245 °C peak reflow), ensuring robust manufacturability. The device's 0.90 °C/W junction-to-case thermal resistance enables effective power derating above TA = 25 °C, validated by Fig. 1 in Document 88387.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.0 V - Maximum continuous reverse operating voltage before clamping begins; defines system bus voltage compatibility for 24 V automotive applications. |
| VC @ IPPM | 53.5 V - Clamped voltage at 123 A peak pulse current; limits downstream IC stress during ISO7637-2 load dump events. |
| PPPM (10/1000 μs) | 6600 W - Peak surge power handling capacity; supports high-energy transients without failure in alternator load dump scenarios. |
| TJ max. | 175 °C - Maximum junction temperature rating; enables reliable operation in engine compartment environments per AEC-Q101. |
| RθJC | 0.90 °C/W - Junction-to-case thermal resistance; allows precise thermal design when mounted on heatsinked PCB copper or metal chassis. |
| ID @ VWM | <10 μA - Reverse leakage current at 30 V; minimizes standby power loss in always-on vehicle modules. |
| IFSM | 700 A - Non-repetitive forward surge current rating (8.3 ms); withstands high-current inrush during system power-up or fault conditions. |
Pinout & Package
Package: DO-218AB - Surface-mount molded case with matte tin-plated leads, UL 94 V-0 rated compound, and heatsink terminal (anode) integrated into the metal base. Compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit node; carries transient current during clamping; requires low-inductance trace routing. |
| Lead 2 / Metal Heatsink | Anode | Primary thermal path and electrical return; must be soldered to large copper pour or metal chassis for RθJC = 0.90 °C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| ISO7637-2 compliant | Withstands defined load dump waveforms (e.g., Pulse 5a) without degradation; verified per test condition variations in spec. |
| MSL Level 1 | Rated for peak reflow of 245 °C; supports standard lead-free SMT assembly without moisture sensitivity concerns. |
| Junction passivation | Optimized anisotropic rectifier die process ensures stable VBR and low leakage over lifetime at TJ = 175 °C. |
| Low VF | Max 1.8 V forward voltage at 100 A (8.3 ms half-sine); reduces conduction loss during forward-biased surge events. |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle electrical systems from alternator-induced load dump transients (ISO7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across power rail upstream of DC/DC converters and microcontrollers. Use Value: Clamps transient to ≤53.5 V at 123 A, preventing damage to downstream 3.3 V/5 V logic while sustaining 175 °C junction temperature. |
Use Scenario: Safeguarding ECU power inputs against battery disconnection surges and inductive switching spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main VBAT input, coordinated with fuse and LC filtering. Use Value: Delivers 6600 W surge immunity with <10 μA leakage at 30 V, preserving low-power sleep mode integrity. |
| Body Control Module (BCM) Power Rail | ADAS Camera Power Supply |
Use Scenario: Securing BCM 12 V supply against relay coil flyback and motor driver commutation noise. IC Role / Device Role / Timing Role: Fast-response TVS connected between VBAT and GND, adjacent to input connector. Use Value: Achieves 53.5 V clamping within nanoseconds, limiting voltage overshoot to levels compatible with automotive-grade PMICs. |
Use Scenario: Protecting 5 V camera module power input from hot-swap and cable ESD events in rear-view systems. IC Role / Device Role / Timing Role: Secondary TVS on regulated output rail, supplementing primary front-end protection. Use Value: Maintains <10 μA leakage at 30 V stand-off, avoiding interference with precision analog sensor biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/5AT | Lower PPPM (400 W vs. 6600 W); SMA package (RθJC ≈ 40 °C/W); bidirectional option available. | Not suitable for load dump; limited to lower-energy ESD and inductive spikes in non-automotive consumer gear. | Select only for cost-sensitive, non-automotive applications where surge energy is <10% of SM8S30-E3/2D capability. |
| TPSMD30A | Same DO-218AB package; 53.3 V VC at 124 A; slightly lower VBR min (33.3 V) but identical VWM (30.0 V). | Compatible for load dump; however, not AEC-Q101 qualified and lacks ISO7637-2 validation documentation. | Acceptable for industrial 24 V systems requiring high surge rating but not certified automotive deployment. |
Compared with SMAJ30A-E3/5AT and TPSMD30A, the SM8S30-E3/2D uniquely combines AEC-Q101 qualification, ISO7637-2 compliance, and 6600 W surge rating in DO-218AB-enabling single-device load dump protection without parallel stacking or external heatsinking.
Availability
SM8S30-E3/2D is available at Aetrix Electronics and suitable for automotive electronics, engine control units, and body control modules requiring stable component supply with full AEC-Q101 traceability and long-term production continuity.
Supply support for SM8S30-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 high-reliability diodes, MOSFETs, and TVS devices for automotive, industrial, and computing markets.
The SM8S30-E3/2D belongs to Vishay's PAR® (Passivated Anisotropic Rectifier) TVS family, engineered specifically for high-temperature, high-surge automotive power rail protection with emphasis on load dump immunity and under-hood thermal resilience.
FAQ
What is the clamping voltage of the SM8S30-E3/2D at its rated peak pulse current?
The SM8S30-E3/2D has a maximum clamping voltage (VC) of 53.5 V at its specified peak pulse current (IPPM) of 123 A using the 10/1000 μs waveform. This value is measured per the conditions in Vishay Document 88387 and ensures downstream components see no more than 53.5 V during worst-case load dump events. The SM8S30-E3/2D maintains this clamping performance across its full operating temperature range up to TJ = 175 °C.
Is the SM8S30-E3/2D qualified for automotive use according to industry standards?
Yes, the SM8S30-E3/2D is AEC-Q101 qualified and explicitly tested for automotive reliability, including high-temperature operation up to 175 °C junction temperature. It also meets ISO7637-2 surge requirements for load dump protection and complies with J-STD-020 MSL Level 1 for lead-free reflow. These qualifications are documented in Vishay's official specification sheet (Document Number 88387) and confirmed in the ordering information section.
What package does the SM8S30-E3/2D use, and how is thermal management implemented?
The SM8S30-E3/2D uses the DO-218AB surface-mount package, where the metal base serves as both the anode terminal and primary thermal path. Its typical junction-to-case thermal resistance (RθJC) is 0.90 °C/W, enabling efficient heat transfer when soldered directly to a large copper pour or metal chassis. This thermal design is critical to sustaining its 6600 W surge rating and 175 °C operation without derating in compact automotive layouts.
Does the SM8S30-E3/2D meet RoHS and halogen-free requirements?
Yes, the SM8S30-E3/2D is RoHS-compliant per Directive 2011/65/EU and conforms to JEDEC JS709A halogen-free standards. The "E3" suffix in the part number denotes RoHS-compliant matte tin plating and halogen-free molding compound. Vishay confirms full compliance in its Material Category Policy documentation (Document 91000), and the device carries no exemptions under current EU regulations.
How does the SM8S30-E3/2D differ from the SM8S30A variant?
The SM8S30-E3/2D is the standard unidirectional version with VBR min/max of 33.3 V / 40.7 V, while the SM8S30A variant has tighter breakdown tolerance (33.3 V / 36.8 V) and lower clamping voltage (48.4 V at 136 A). Both share identical VWM (30.0 V), package (DO-218AB), and AEC-Q101 qualification. The SM8S30-E3/2D offers higher surge margin for less tightly regulated systems, whereas SM8S30A suits designs requiring stricter voltage control during clamping.
SM8S30-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 123A
- Power - Peak Pulse:
- 6600W (6.6kW)
- 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
SM8S30-E3/2D FAQ
1.How can I place an order for SM8S30-E3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S30-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 SM8S30-E3/2D reliable?
The price and inventory of SM8S30-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 SM8S30-E3/2D is usually 5 days.
3.What payment methods are accepted for SM8S30-E3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S30-E3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S30-E3/2D?
SM8S30-E3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S30-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 SM8S30-E3/2D?
For technical support, including SM8S30-E3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S30-E3/2D requirements.
6.How does Aetrix verify that SM8S30-E3/2D is sourced from the original manufacturer or authorized distributors?
All SM8S30-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 SM8S30-E3/2D meets industry standards.
7.What is the process for return or replacement of SM8S30-E3/2D?
All SM8S30-E3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM8S30-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 SM8S30-E3/2D part is unused and in its original packaging.
Return procedure for SM8S30-E3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S30-E3/2D Tags
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