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Vishay General Semiconductor - Diodes Division SM5S30ATHE3/I
- Part No.:
- SM5S30ATHE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM5S30ATHE3/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,675
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Product details
Overview
SM5S30ATHE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AC package, rated for 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown (VBR at 5 mA), 48.4 V clamping voltage at 150 A peak pulse current, and 3600 W peak pulse power (10/1000 μs). It delivers automotive-grade reliability with AEC-Q101 qualification, 175 °C junction temperature rating, and ISO7637-2 load dump compliance - deployed in 12 V automotive power rail protection.
For engineers reviewing the SM5S30ATHE3/I datasheet, SM5S30ATHE3/I pinout, SM5S30ATHE3/I application, or SM5S30ATHE3/I equivalent, key selection criteria include unidirectional polarity, heatsink-anode configuration, low leakage (<10 μA at VWM), high surge capability (500 A IFSM), and MSL Level 1 reflow compatibility up to 245 °C peak.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low forward voltage drop (≤2.0 V at 100 A). Its thermal resistance (RθJC = 1.0 °C/W) enables efficient heat transfer to the metal heatsink terminal, supporting sustained operation at TJ = 175 °C under load dump transients.
The device is designed exclusively for unidirectional clamping, with cathode and anode terminals clearly defined by mechanical orientation (heatsink = anode). It meets ISO7637-2 test conditions for automotive load dump immunity and complies with JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins; sets threshold for 12 V automotive system protection. |
| VBR (min/typ/max) | 33.3 / 35.1 / 36.8 V at 5 mA - defines precise breakdown onset; ensures reliable triggering above normal rail fluctuations. |
| VC @ IPPM | 48.4 V at 150 A (10/1000 μs) - clamping voltage limits downstream IC stress during surge events. |
| PPPM (10/1000 μs) | 3600 W - peak transient energy handling capacity for short-duration load dump pulses. |
| TJ max. | 175 °C - enables placement near hot engine-control units without derating penalties. |
| ID @ VWM | <10 μA at 25 °C - minimizes standby power loss in always-on vehicle modules. |
| RθJC | 1.0 °C/W - allows direct thermal coupling to PCB copper pour or heatsink for stable long-pulse dissipation. |
Pinout & Package
Package: DO-218AC - surface-mount, single-metal-heatsink package with matte tin-plated leads; anode connected to metal heatsink tab, cathode to lead 1; meets MSL Level 1 (245 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit node; reverse-biased during clamping; requires proper trace routing to avoid parasitic inductance. |
| Metal Heatsink (Lead 2) | Anode | Primary thermal and electrical return path; must be soldered to ≥1 cm² copper area for RθJC performance and surge current conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Enables stable VBR drift <±5% over 1000 hrs at 175 °C - critical for under-hood longevity. |
| AEC-Q101 qualification | Validated for automotive use per stress test standard including HTGB, HTRB, and TCT - eliminates qualification overhead for Tier 1 designs. |
| ISO7637-2 compliance | Withstands 12 V system load dump pulses (≥100 V, 400 ms) without degradation - meets OEM power net immunity specs. |
| Low VF (≤2.0 V @ 100 A) | Reduces forward conduction loss during bidirectional fault events - improves efficiency in clamp-and-shunt architectures. |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling - ensures long-term solder joint integrity in automotive environments. |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Suppresses 12 V battery line transients caused by alternator load dump (up to 100 V, 400 ms) in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed upstream of DC/DC converter input. Use Value: Limits voltage seen by downstream regulators to ≤48.4 V, preventing latch-up or permanent damage to 5 V/3.3 V logic rails. |
Use Scenario: Protects microcontroller power supply pins against coupled transients from solenoid drivers and ignition coils. IC Role / Device Role / Timing Role: Fast-response transient suppressor on main 5 V rail, triggered within nanoseconds of overvoltage onset. Use Value: Maintains ECU functional safety integrity by ensuring VCC stays within 5.5 V ABSMAX during ISO7637-2 Pulse 5a/b events. |
| Body Control Module (BCM) Power Distribution | ADAS Camera Power Interface |
Use Scenario: Shields centralized power distribution nodes feeding door locks, lighting, and HVAC actuators. IC Role / Device Role / Timing Role: High-energy TVS on fused 12 V feed, coordinated with fuse timing to avoid nuisance blowing. Use Value: Absorbs 3600 W surges without failure, enabling single-device protection instead of multi-stage RC+TVS networks. |
Use Scenario: Guards 12 V input of 77 GHz radar or surround-view camera modules mounted near engine bay. IC Role / Device Role / Timing Role: Primary front-end surge protector before DC/DC and LDO stages in compact camera housing. Use Value: Leverages DO-218AC's low-profile heatsink to dissipate heat in space-constrained enclosures while maintaining 175 °C operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S30AHM3 | Same electrical specs but with enhanced moisture sensitivity level (MSL 1, LF peak 260 °C); identical DO-218AC package and pinout. | Qualified for lead-free reflow profiles exceeding 245 °C; preferred for high-volume SMT lines using modern 260 °C peak profiles. | Select SM5S30AHM3 when board assembly uses IPC/JEDEC J-STD-020 Ed. 7.2-compliant 260 °C reflow; otherwise SM5S30ATHE3/I remains fully compatible. |
| SMAJ30A | Lower PPPM (400 W vs. 3600 W), smaller SMA package (RθJC = 45 °C/W), no AEC-Q101 qualification. | Limited to non-automotive, low-energy industrial I/O protection; cannot replace SM5S30ATHE3/I in load dump scenarios. | Use SMAJ30A only for cost-sensitive consumer applications where surge energy is <500 W and automotive qualification is unnecessary. |
Compared with SM5S30AHM3, the SM5S30ATHE3/I offers identical clamping and thermal performance but targets legacy 245 °C reflow lines; versus SMAJ30A, it delivers 9× higher surge power handling and certified automotive reliability - making it irreplaceable in safety-critical 12 V power rail protection.
Availability
SM5S30ATHE3/I is available at Aetrix Electronics and suitable for automotive electronics, engine control systems, and body electronics requiring stable component supply with full traceability and long-lifecycle support.
Supply support for SM5S30ATHE3/I 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 passive components for automotive, industrial, and computing markets.
The SM5SxxAT family was engineered specifically for automotive load dump protection, combining high-temperature silicon design, robust packaging, and AEC-Q101 validation to meet stringent OEM power net immunity requirements.
FAQ
What is the polarity configuration of the SM5S30ATHE3/I?
The SM5S30ATHE3/I is a unidirectional TVS diode with anode connected to the metal heatsink tab and cathode on lead 1. This configuration ensures clamping only during positive transients on the protected line relative to ground, matching standard automotive 12 V power rail protection topology. Polarity is mechanically fixed and must be observed during PCB layout to avoid reverse-bias failure.
Is the SM5S30ATHE3/I qualified for automotive applications?
Yes, the SM5S30ATHE3/I carries AEC-Q101 qualification and is explicitly rated for automotive use. Its 175 °C junction temperature capability, ISO7637-2 load dump compliance, JESD201 Class 2 whisker resistance, and RoHS-compliant HE3 suffix confirm suitability for under-hood ECUs, BCMs, and ADAS modules. Vishay documents this qualification in datasheet revision 21-Mar-2024, Document Number 87609.
What is the maximum clamping voltage of the SM5S30ATHE3/I at rated surge current?
The SM5S30ATHE3/I clamps to a maximum of 48.4 V at 150 A peak pulse current (10/1000 μs waveform). This value is guaranteed across temperature and lifetime, and defines the upper voltage limit imposed on downstream circuitry during worst-case transients. It is measured under standardized test conditions and appears in the Electrical Characteristics table on page 2 of the official datasheet.
Can the SM5S30ATHE3/I replace older SMAJ or SMBJ series TVS diodes?
No - the SM5S30ATHE3/I is not a drop-in replacement for SMAJ or SMBJ devices due to fundamental differences in surge capability, thermal design, and qualification. With 3600 W PPPM (vs. 400 W for SMAJ30A) and DO-218AC's integrated heatsink, the SM5S30ATHE3/I requires different PCB layout, thermal relief, and fuse coordination. Direct substitution would risk inadequate protection or thermal runaway.
What does the "HE3/I" suffix indicate in SM5S30ATHE3/I?
The "HE3" suffix denotes RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads meeting J-STD-002 and JESD22-B102 solderability standards; "I" specifies packaging in 13-inch plastic tape and reel (750 units per reel), with anode oriented toward sprocket holes. This ordering code ensures traceable, automotive-grade supply chain compliance and automated placement readiness.
SM5S30ATHE3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AC
- 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:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 74A
- 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-218AC
SM5S30ATHE3/I FAQ
1.How can I place an order for SM5S30ATHE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S30ATHE3/I 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 SM5S30ATHE3/I reliable?
The price and inventory of SM5S30ATHE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S30ATHE3/I is usually 5 days.
3.What payment methods are accepted for SM5S30ATHE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S30ATHE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S30ATHE3/I?
SM5S30ATHE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S30ATHE3/I 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 SM5S30ATHE3/I?
For technical support, including SM5S30ATHE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S30ATHE3/I requirements.
6.How does Aetrix verify that SM5S30ATHE3/I is sourced from the original manufacturer or authorized distributors?
All SM5S30ATHE3/I 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 SM5S30ATHE3/I meets industry standards.
7.What is the process for return or replacement of SM5S30ATHE3/I?
All SM5S30ATHE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S30ATHE3/I, 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 SM5S30ATHE3/I part is unused and in its original packaging.
Return procedure for SM5S30ATHE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S30ATHE3/I Tags
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Toshiba Semiconductor and Storage
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