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Vishay General Semiconductor - Diodes Division SM15T36CAHM3/I
- Part No.:
- SM15T36CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T36CAHM3/I.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,562
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Product details
Overview
SM15T36CAHM3/I from Vishay General Semiconductor is a bidirectional 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 clamps to ≤64.3 V at 156 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/I datasheet, SM15T36CAHM3/I pinout, SM15T36CAHM3/I application, or SM15T36CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (1.79), and SMC package thermal performance with RθJL = 15 °C/W.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, with breakdown voltage VBR = 38.0–42.0 V (min/max) at 1 mA test current and clamping voltage VC = 64.3 V at IPPM = 156 A. Its low dynamic impedance ensures stable voltage limiting during fast transients.
Designed for high-energy surge immunity, it meets IEC 61000-4-5 (10/1000 μs) and supports operation from −65 °C to +150 °C junction temperature. The device features glass-passivated junction, MSL Level 1 moisture sensitivity, and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe working range for 3.3 V–24 V rail protection. |
| VBR (min/max) | 38.0 / 42.0 V - Breakdown occurs within this band at 1 mA; ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 64.3 V - Clamped voltage at 156 A peak pulse; limits downstream IC stress to <2× VWM during lightning surges. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 μs waveform; suitable for Level 4 IEC 61000-4-5 compliance. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments without derating. |
| RθJL | 15 °C/W - Junction-to-lead thermal resistance; supports reliable power dissipation with minimal PCB copper area. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical terminals with cathode/anode interchangeable in AC-coupled paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Interchangeable terminal; forms symmetrical clamping path - no polarity dependency in AC or differential signal protection. |
| Terminal 2 | Cathode / Anode (bidirectional) | Interchangeable terminal; completes bidirectional conduction path - enables single-device protection of balanced lines like CAN or RS-485. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control and ADAS sensor modules. |
| Halogen-free & RoHS-compliant | Meets JEDEC JS-014 and IEC 61249-2-21; eliminates brominated flame retardants while maintaining UL 94 V-0 molding compound rating. |
| Low clamping ratio (VC/VWM) | 1.79 - Minimizes overvoltage exposure to protected ICs; critical for 3.3 V/5 V logic interfacing with tight VIH/VIL margins. |
| MSL Level 1 | Reflow-compatible up to 260 °C peak; supports standard lead-free assembly without baking or special handling. |
| Glass-passivated junction | Enhances long-term stability and reduces parameter drift under humidity and thermal stress - improves field lifetime in industrial enclosures. |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs in body control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp absorbing ±100 V/50 A transients on 12 V supply lines and data buses. Use Value: Prevents latch-up or gate oxide damage in transceivers by limiting voltage to 64.3 V - within absolute maximum ratings of TJA1042 and SN65HVD230. |
Use Scenario: Shielding PLC analog input channels (4–20 mA, 0–10 V) from induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Fast-response shunt protector diverting >1 kA surge energy away from precision op-amps and ADC front-ends. Use Value: Maintains signal integrity with <1 nF junction capacitance - avoids bandwidth degradation in 100 kHz measurement circuits. |
| Telecom Line Card | Consumer Power Adapter |
Use Scenario: Safeguarding Ethernet PHY ports (10/100BASE-TX) against ESD and lightning surges entering via RJ-45 jacks. IC Role / Device Role / Timing Role: Common-mode transient suppressor on differential pairs, placed before magnetics and PHY IC. Use Value: Achieves <300 ps response time and <10 pF inter-pin capacitance - preserves signal rise/fall times and eye diagram integrity. |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters where 20 V output rails require robust fault containment. IC Role / Device Role / Timing Role: Final-stage clamp preventing secondary-side MOSFET or controller damage during output short-circuit recovery. Use Value: Withstands 200 A IFSM surge - survives repeated 10 ms half-sine faults without parametric shift or short-circuit failure mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Lower PPPM = 600 W; same VWM = 36 V but higher VC = 58.1 V at 103 A; SMB package (smaller footprint, higher RθJA). | Not recommended for IEC 61000-4-5 Level 4; suitable only for lower-energy threats like ESD or local switching noise. | Select SMBJ36CA only when board space is constrained and surge threat level is limited to IEC 61000-4-2 or ISO 10605. |
| 1.5KE36CA | Higher PPPM = 1500 W but axial DO-201 package; slower response due to higher parasitic inductance; not surface-mountable. | Requires through-hole assembly and larger PCB real estate; incompatible with automated SMT lines. | Choose 1.5KE36CA only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ36CA and 1.5KE36CA, SM15T36CAHM3/I delivers optimal balance of high-energy surge handling, SMT manufacturability, AEC-Q101 qualification, and low-profile packaging - making it the preferred choice for volume automotive and industrial production.
Availability
SM15T36CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line cards, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SM15T36CAHM3/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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and application-specific performance.
The SM15T Series was engineered specifically for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, halogen-free compliance, and 1500 W surge capacity are mandatory.
FAQ
What is the clamping voltage of SM15T36CAHM3/I at its rated peak pulse current?
The SM15T36CAHM3/I clamps to a maximum of 64.3 V at its rated peak pulse current of 156 A (10/1000 μs waveform). This value is measured under standardized test conditions per Figure 1 in Vishay document 88380 and reflects worst-case performance across temperature and lot variation. The SM15T36CAHM3/I maintains this clamping behavior bidirectionally, ensuring consistent protection for both positive and negative transients.
Is SM15T36CAHM3/I suitable for automotive applications?
Yes, SM15T36CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly rated for operation from −65 °C to +150 °C and validated for mechanical shock, temperature cycling, and HTRB - meeting requirements for engine bay, chassis, and ADAS sensor module deployments. The SM15T36CAHM3/I appears in Vishay's automotive ordering matrix with revision code "I" denoting full qualification.
What does the "CA" suffix mean in SM15T36CAHM3/I?
The "CA" suffix in SM15T36CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both polarities without polarity marking. Unlike unidirectional variants (e.g., SM15T36A), the CA version has identical VBR, VC, and IPPM characteristics in either direction, enabling use on AC-coupled lines, differential buses (e.g., CAN, RS-485), and floating power domains. The SM15T36CAHM3/I achieves this via back-to-back diode junction architecture.
What is the thermal resistance of SM15T36CAHM3/I from junction to lead?
The SM15T36CAHM3/I has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, as specified in the Thermal Characteristics table of Vishay document 88380. This low value enables efficient heat transfer to PCB copper pads and supports sustained power dissipation without excessive junction temperature rise. The SM15T36CAHM3/I achieves this via optimized SMC (DO-214AB) package geometry and direct metal leadframe contact.
How does SM15T36CAHM3/I compare to SM15T36A in terms of electrical behavior?
SM15T36CAHM3/I is bidirectional with symmetrical breakdown and clamping in both directions, whereas SM15T36A is unidirectional with cathode marking and forward conduction capability. The SM15T36CAHM3/I exhibits identical VBR (38.0–42.0 V), VC (64.3 V), and PPPM (1500 W) in either polarity, while SM15T36A conducts forward current up to 200 A (IFSM) but blocks only in reverse. Use SM15T36CAHM3/I for AC or differential signal protection; use SM15T36A only for DC rail clamping with defined polarity.
SM15T36CAHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for SM15T36CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T36CAHM3/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/I reliable?
The price and inventory of SM15T36CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for SM15T36CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T36CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T36CAHM3/I?
SM15T36CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T36CAHM3/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/I?
For technical support, including SM15T36CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T36CAHM3/I requirements.
6.How does Aetrix verify that SM15T36CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM15T36CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of SM15T36CAHM3/I?
All SM15T36CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T36CAHM3/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/I part is unused and in its original packaging.
Return procedure for SM15T36CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T36CAHM3/I Tags
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