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Vishay General Semiconductor - Diodes Division SM5S30CAHM3/I
- Part No.:
- SM5S30CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S30CAHM3/I.pdf
- Description:
- 3600 W BI-DIRECTIONAL TVS IS DO-
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SM5S30CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount PAR® transient voltage suppressor (TVS) diode in DO-218AC package, rated for 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown (VBR), and 3600 W peak pulse power (10/1000 µs). It delivers 74.4 A peak pulse current and clamps to ≤48.4 V under surge, meeting AEC-Q101 qualification and ISO 7637-2/16750-2 for automotive load dump protection.
For engineers reviewing the SM5S30CAHM3/I datasheet, SM5S30CAHM3/I pinout, SM5S30CAHM3/I application, or SM5S30CAHM3/I equivalent, this device serves as a high-reliability, high-temperature (TJ = 175 °C) TVS for 12 V/24 V automotive power rail surge suppression where low leakage (<10 µA at VWM), MSL Level 1 compatibility, and halogen-free RoHS compliance are required.
Technical Context
This TVS operates as a voltage-clamping protector using avalanche breakdown. Its bidirectional symmetry enables symmetrical transient suppression on AC or dual-polarity DC lines without polarity dependency. The DO-218AC package integrates a metal heatsink terminal for low thermal resistance (RθJM = 0.45 °C/W), enabling high-power dissipation in compact automotive PCB layouts.
It meets ISO 7637-2 Pulse 5a (load dump) and ISO 16750-2 supply voltage variation tests when applied with appropriate series impedance. Clamping performance is specified at IPPM = 74.4 A (10/1000 µs), yielding VC ≤ 48.4 V - a critical margin above 30 V VWM to avoid false triggering while ensuring downstream ICs remain below absolute maximum ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.0 V - Maximum continuous reverse operating voltage before conduction; sets minimum system overvoltage threshold for protection activation. |
| VBR (min/typ/max) | 33.3 / 35.1 / 36.8 V - Breakdown voltage range at 5 mA test current; defines onset of avalanche clamping behavior. |
| VC @ IPPM | ≤48.4 V at 74.4 A (10/1000 µs) - Maximum clamped voltage during worst-case surge; determines protected circuit's peak stress level. |
| PPPM (10/1000 µs) | 3600 W - Peak pulse power handling capacity; supports high-energy transients like automotive load dump without failure. |
| ID @ VWM | ≤10 µA at 25 °C - Reverse leakage current; ensures minimal quiescent power loss and signal integrity in always-on systems. |
| TJ max. | +175 °C - Maximum junction temperature rating; enables operation in under-hood automotive environments without derating. |
| Package | DO-218AC - Surface-mount package with integrated metal heatsink terminal; provides low RθJM (0.45 °C/W) and MSL Level 1 reflow compatibility. |
Pinout & Package
SM5S30CAHM3/I uses the DO-218AC package: a two-terminal surface-mount device with a metal heatsink base acting as Terminal 2 (cathode/anode common in bidirectional configuration). Polarity is non-directional; no cathode band marking. Leads are matte tin-plated and solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Anode-side lead) | Anode connection (bidirectional) | One side of the symmetrical avalanche junction; connects to protected line (e.g., battery rail). |
| Terminal 2 (Metal heatsink base) | Cathode connection (bidirectional) | Common heatsink and electrical terminal; must be connected to ground or return path for thermal and electrical performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for engine control, body electronics, and ADAS modules. |
| 175 °C junction rating | Enables uninterrupted operation in under-hood ambient temperatures up to +125 °C with sufficient thermal margin for power dissipation. |
| Meets ISO 7637-2 & ISO 16750-2 | Complies with automotive transient immunity standards for load dump (Pulse 5a), jump start, and supply interruption - no additional external filtering needed. |
| MSL Level 1, 245 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
| Halogen-free, RoHS-compliant (M3) | Fulfills environmental compliance mandates for global vehicle markets and simplifies end-of-life material reporting. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Protection |
|---|---|
Use Scenario: Protecting 12 V power input to microcontroller-based ECUs exposed to alternator load dump transients up to 40 V for 400 ms. IC Role / Device Role / Timing Role: Primary clamping TVS placed directly at connector entry point to limit rail voltage before LDOs and MCU VDD pins. Use Value: Clamps to ≤48.4 V within nanoseconds, preventing latch-up or oxide damage to 5 V/3.3 V regulators and logic circuits downstream. |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair against coupled transients induced by nearby high-current switching (e.g., window lift motors). IC Role / Device Role / Timing Role: Bidirectional TVS placed across CAN bus lines to shunt common-mode surges while preserving signal integrity. Use Value: Low capacitance (≈100 pF at VWM) avoids CAN bit-rate degradation at 500 kbps; bidirectional symmetry handles both polarities of ESD or inductive kick. |
| ADAS Camera Power Rail | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Securing 12 V input to image sensor modules mounted near engine compartments subject to repeated thermal cycling and load dump events. IC Role / Device Role / Timing Role: First-line transient suppressor upstream of DC-DC converter, absorbing energy before regulation stage. Use Value: 3600 W peak power rating sustains multiple load dump events without parametric shift; TJ = 175 °C rating prevents thermal runaway during extended hot-soak conditions. |
Use Scenario: Protecting H-bridge gate driver ICs and current sense amplifiers from voltage spikes generated during motor commutation and regenerative braking. IC Role / Device Role / Timing Role: High-energy TVS placed across motor supply rails (VMOT/GND) to clamp fast-rising spikes (<100 ns rise time). Use Value: 74.4 A peak pulse current capability handles repetitive 10/1000 µs surges typical in EPS motor phase switching; DO-218AC metal heatsink enables efficient heat transfer to PCB copper pour. |
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-E3/57T | DO-214AC package; lower PPPM (400 W); VBR = 33.3–36.7 V; not AEC-Q101 qualified. | Limited to industrial or consumer-grade 12 V systems without automotive qualification requirements. | Select when cost sensitivity outweighs automotive reliability needs and surge energy is <10% of SM5S30CAHM3/I capability. |
| TPSMD30A | DO-218AC package; same VWM/VBR range; PPPM = 3000 W; AEC-Q101 qualified; higher VC (53.3 V). | Acceptable for less stringent clamping margins but insufficient for systems requiring <49 V clamping headroom. | Choose only if board layout allows higher clamping voltage and thermal design accommodates reduced power rating. |
Compared with SMAJ30A-E3/57T and TPSMD30A, SM5S30CAHM3/I offers superior surge robustness (3600 W vs. 400 W / 3000 W), guaranteed automotive qualification, and tighter clamping (48.4 V), making it the preferred choice for safety-critical 12 V automotive power rails where long-term reliability under thermal stress is mandatory.
Availability
SM5S30CAHM3/I is available at Aetrix Electronics and suitable for automotive engine control units, body electronics modules, ADAS camera systems, and electric power steering designs requiring stable component supply with full AEC-Q101 traceability and long-lifecycle support.
Supply support for SM5S30CAHM3/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 applications.
The SM5SxxCA family is engineered specifically for high-energy automotive transient suppression, combining AEC-Q101 qualification, DO-218AC thermal efficiency, and ISO-standard compliance to replace legacy axial or larger SMD TVS solutions in space-constrained ECUs.
FAQ
What is the maximum clamping voltage of SM5S30CAHM3/I under a 10/1000 µs surge?
The SM5S30CAHM3/I has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current of 74.4 A with a 10/1000 µs waveform. This value is measured per Figure 4 in the official Vishay datasheet (Doc. #98458) and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events - critical for ensuring protected ICs remain within their absolute maximum ratings.
Is SM5S30CAHM3/I suitable for use in under-hood automotive applications?
Yes, SM5S30CAHM3/I is explicitly designed for under-hood use: it is AEC-Q101 qualified, rated for TJ = -55 °C to +175 °C, and validated per ISO 7637-2 and ISO 16750-2. Its DO-218AC package provides low thermal resistance (RθJM = 0.45 °C/W), enabling reliable operation in ambient temperatures up to +125 °C when properly mounted on thermally enhanced PCB copper pours - a requirement for modern engine control and transmission control units.
Does SM5S30CAHM3/I have polarity markings, and how is it connected in circuit?
No, SM5S30CAHM3/I is a bidirectional TVS diode with no cathode band or polarity marking. It functions identically regardless of orientation across a protected line and ground. In practice, Terminal 1 connects to the line being protected (e.g., battery rail), and Terminal 2 (the metal heatsink base) connects to system ground - serving both as the electrical return path and primary thermal interface to the PCB.
What is the leakage current specification for SM5S30CAHM3/I at its stand-off voltage?
At its 30.0 V stand-off voltage (VWM) and TA = 25 °C, SM5S30CAHM3/I exhibits a maximum reverse leakage current (ID) of 10 µA. At elevated junction temperature (TJ = 175 °C), leakage increases to ≤250 µA - still well within acceptable limits for low-power always-on automotive modules such as remote keyless entry receivers or tire pressure monitoring sensors.
How does the DO-218AC package of SM5S30CAHM3/I improve thermal performance compared to DO-214AC?
The DO-218AC package of SM5S30CAHM3/I incorporates an exposed metal heatsink base (Terminal 2), reducing junction-to-mount thermal resistance to just 0.45 °C/W - over 10× better than typical DO-214AC devices (~5–8 °C/W). This enables sustained 3600 W surge handling without thermal runaway and supports higher power density in compact automotive PCB layouts where copper area is constrained.
SM5S30CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 74.4A
- 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
SM5S30CAHM3/I FAQ
1.How can I place an order for SM5S30CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S30CAHM3/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 SM5S30CAHM3/I reliable?
The price and inventory of SM5S30CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S30CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM5S30CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S30CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S30CAHM3/I?
SM5S30CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S30CAHM3/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 SM5S30CAHM3/I?
For technical support, including SM5S30CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S30CAHM3/I requirements.
6.How does Aetrix verify that SM5S30CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM5S30CAHM3/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 SM5S30CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM5S30CAHM3/I?
All SM5S30CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S30CAHM3/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 SM5S30CAHM3/I part is unused and in its original packaging.
Return procedure for SM5S30CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S30CAHM3/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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