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Vishay General Semiconductor - Diodes Division SM15T36CAHM3_A/I
- Part No.:
- SM15T36CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T36CAHM3_A/I.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,439
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Product details
Overview
SM15T36CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 36 V standoff voltage (VWM), and clamping voltage of 49.9 V at 30 A peak pulse current. It protects signal lines and power rails in automotive sensor units and industrial I/O interfaces against lightning-induced and switching transients.
For engineers reviewing the SM15T36CAHM3_A/I datasheet, SM15T36CAHM3_A/I pinout, SM15T36CAHM3_A/I application, or SM15T36CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (HM3 suffix), 30 A IPPM rating at 49.9 V VC, low-inductance SMC package, and halogen-free RoHS compliance.
Technical Context
The SM15T36CAHM3_A/I operates as a bidirectional avalanche diode with symmetrical breakdown characteristics in both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its 36 V stand-off voltage ensures compatibility with 24 V nominal systems while maintaining margin above operating rail.
Clamping occurs at 49.9 V under 30 A 10/1000 μs transient, delivering precise overvoltage limiting with minimal let-through energy. Thermal resistance is 75 °C/W junction-to-ambient (on recommended 8.0 mm × 8.0 mm copper pads), supporting reliable operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - Maximum continuous reverse working voltage before leakage exceeds 1 μA; sets upper limit for safe DC bias in protected circuit. |
| VBR min/max | 34.2 V / 37.8 V at 1 mA - Confirmed breakdown threshold range; guarantees conduction onset within defined window for predictable clamping. |
| VC @ IPPM | 49.9 V at 30 A (10/1000 μs) - Clamping voltage during worst-case surge; determines maximum stress on downstream ICs like microcontrollers or transceivers. |
| PPPM | 1500 W - Peak pulse power handling capacity; enables robust protection against lightning surges per IEC 61000-4-5 Level 4. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; optimized for automated placement and thermal pad layout. |
Pinout & Package
SM15T36CAHM3_A/I is a two-terminal bidirectional TVS diode in SMC (DO-214AB) package. No polarity marking is applied; terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity assignment required in layout. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; device conducts equally in both directions above VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity concerns. |
| AEC-Q101 qualified (HM3) | Validated for automotive applications including engine control modules and ADAS sensor interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for automotive and industrial OEMs; supports lead-free reflow soldering up to 260 °C peak. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes let-through voltage relative to breakdown, reducing risk of latch-up or damage to 3.3 V/5 V logic interfaces. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers in vehicle door modules exposed to load dump and ESD events. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to shunt transient energy. Use Value: Maintains signal integrity during 1 kV/1.2/50 μs surges while meeting ISO 16750-2 pulse 5a requirements. |
Use Scenario: Safeguarding PLC analog input channels connected to field sensors in factory automation. IC Role / Device Role / Timing Role: Parallel-connected TVS suppressing induced transients from motor drives or relay coils on 24 V supply lines. Use Value: Limits clamped voltage to 49.9 V, preventing damage to 24 V-rated ADC front-ends and isolators. |
| Telecom Power Rail | Consumer USB Port |
Use Scenario: Guarding 48 V PoE-powered Ethernet switch ports against lightning-induced surges on data lines. IC Role / Device Role / Timing Role: Bidirectional suppressor installed between twisted-pair conductors and ground to absorb common-mode transients. Use Value: Withstands 1500 W pulses without degradation, ensuring uptime in outdoor telecom infrastructure. |
Use Scenario: Adding secondary-level surge protection to USB 2.0 VBUS line in smart home hubs. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing fast ESD events (IEC 61000-4-2 ±8 kV contact) before they reach USB controller. Use Value: Low 1 μA leakage at 30.8 V preserves battery life in always-on devices while clamping sub-50 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA | Lower PPPM (400 W), same VWM (30.8 V), larger VC (58.1 V at 6.9 A), SMA package (smaller thermal mass). | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy threats like ESD or local switching noise. | Select SMAJ36CA only when board space is constrained and surge threat level is below 1 kV/2 Ω source impedance. |
| SMCJ36CA | Same PPPM (1500 W), identical VWM/VC, but non-AEC-Q101, M3 suffix only (halogen-free/RoHS), no automotive qualification. | Lacks AEC-Q101 validation; not approved for safety-critical automotive subsystems requiring component-level qualification. | Choose SMCJ36CA for cost-sensitive industrial designs where automotive qualification is unnecessary. |
Compared with SMAJ36CA and SMCJ36CA, SM15T36CAHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free construction, and full 1500 W surge capability in a single automotive-grade variant-enabling drop-in use in Tier 1 automotive BOMs without requalification.
Availability
SM15T36CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom power-over-Ethernet equipment requiring stable component supply and long-term lifecycle support.
Supply support for SM15T36CAHM3_A/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 diodes, rectifiers, and protection devices with emphasis on reliability and automotive-grade performance.
The SM15T Series was developed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and 1500 W surge handling.
FAQ
What does the "HM3" suffix indicate in SM15T36CAHM3_A/I?
The HM3 suffix in SM15T36CAHM3_A/I denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. This distinguishes it from commercial-grade variants (E3/M3) and confirms suitability for automotive applications such as body control modules and ADAS sensor interfaces where material compliance and stress-test validation are mandatory. SM15T36CAHM3_A/I meets JESD201 Class 2 whisker resistance and LF peak reflow at 260 °C.
Is SM15T36CAHM3_A/I unidirectional or bidirectional?
SM15T36CAHM3_A/I is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping in both polarities, making it ideal for protecting AC-coupled circuits, differential buses (e.g., RS-485, CAN), or ungrounded power rails. Unlike unidirectional types, SM15T36CAHM3_A/I has no cathode band marking and conducts identically regardless of voltage polarity across its terminals.
What is the maximum clamping voltage of SM15T36CAHM3_A/I under surge conditions?
The maximum clamping voltage of SM15T36CAHM3_A/I is 49.9 V when subjected to a 30 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet (Document Number: 88380) and defines the upper voltage limit imposed on protected circuitry during worst-case transient events, ensuring compatibility with 36 V-rated components.
Does SM15T36CAHM3_A/I require heatsinking for standard operation?
SM15T36CAHM3_A/I does not require external heatsinking for single-event surge suppression, as its 1500 W peak pulse power rating applies under standardized test conditions (mounted on 8.0 mm × 8.0 mm copper pads). However, for repetitive surge scenarios or elevated ambient temperatures, thermal design must account for its 75 °C/W junction-to-ambient resistance and 150 °C maximum junction temperature to avoid derating-induced failure.
How does SM15T36CAHM3_A/I compare to SM15T36A in terms of automotive qualification?
SM15T36CAHM3_A/I is AEC-Q101 qualified, whereas SM15T36A (unidirectional, E3/M3 suffix) lacks automotive qualification. The HM3 suffix confirms that SM15T36CAHM3_A/I underwent full stress testing per AEC-Q101 Rev D, including HTGB, HTRB, and temperature cycling-making it acceptable for use in safety-relevant automotive subsystems where SM15T36A would require additional system-level validation.
SM15T36CAHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 30A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SM15T36CAHM3_A/I FAQ
1.How can I place an order for SM15T36CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T36CAHM3_A/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 SM15T36CAHM3_A/I reliable?
The price and inventory of SM15T36CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T36CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T36CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T36CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T36CAHM3_A/I?
SM15T36CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T36CAHM3_A/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 SM15T36CAHM3_A/I?
For technical support, including SM15T36CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T36CAHM3_A/I requirements.
6.How does Aetrix verify that SM15T36CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T36CAHM3_A/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 SM15T36CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T36CAHM3_A/I?
All SM15T36CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T36CAHM3_A/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 SM15T36CAHM3_A/I part is unused and in its original packaging.
Return procedure for SM15T36CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T36CAHM3_A/I Tags
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