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Vishay General Semiconductor - Diodes Division SM15T36CAHE3_A/I
- Part No.:
- SM15T36CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T36CAHE3_A/I.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,144
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Product details
Overview
SM15T36CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode 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 provides robust protection for automotive-grade sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T36CAHE3_A/I datasheet, SM15T36CAHE3_A/I pinout, SM15T36CAHE3_A/I application, or SM15T36CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C maximum junction temperature, low-inductance SMC package, and compliance with IEC 61000-4-2/4-4/4-5 surge immunity standards.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 34.2–37.8 V (min/max) under 1 mA test current. Its clamping behavior is characterized by a 49.9 V maximum at 30 A IPPM (10/1000 μs), enabling predictable overvoltage limiting during fast transients.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation up to 150 °C junction temperature. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.8 V - Maximum reverse standoff voltage before conduction; defines operating margin below clamping threshold |
| VBR (min/max) | 34.2 V / 37.8 V at 1 mA - Ensures consistent bidirectional breakdown within tolerance band for symmetrical protection |
| VC @ IPPM | 49.9 V at 30 A (10/1000 μs) - Clamping voltage limits downstream IC stress during standardized surge events |
| PPPM | 1500 W - Peak pulse power rating determines survivability against lightning and switching transients |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments without thermal derating penalties |
| Package | SMC (DO-214AB) - Low-inductance surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement for thermal management |
| Qualification | AEC-Q101 qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
SM15T36CAHE3_A/I is a two-terminal bidirectional TVS diode in SMC (DO-214AB) package. No polarity marking is present on bidirectional variants; terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals conduct equally during positive or negative surges; no DC bias dependency |
| Case (cathode band absent) | Mounting interface | Non-polarized mechanical mounting; requires 0.31" × 0.31" copper pads per terminal for thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional 1500 W surge handling | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification (HE3 suffix) | Validates reliability for automotive applications including engine control units and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage exposure to protected ICs while maintaining margin above VWM |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow at 260 °C peak without baking preconditioning |
| Glass-passivated junction | Ensures stable leakage current (<1 μA at VWM) and long-term stability under thermal cycling |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs in vehicle door modules exposed to load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching PHY layer. Use Value: Maintains signal integrity during 10/1000 μs surges up to 30 A while operating within AEC-Q101 automotive qualification envelope. |
Use Scenario: Safeguarding RS-485/CAN FD physical layer transceivers in factory automation PLCs subject to motor switching noise. IC Role / Device Role / Timing Role: Fast-response transient suppressor bridging differential bus lines (CAN_H/CAN_L) to ground. Use Value: Limits clamped voltage to 49.9 V during 1 kV/0.5 kΩ IEC 61000-4-5 surge tests, preserving transceiver functional safety. |
| Telecom Power Input Stage | Consumer USB-C ESD Protection |
Use Scenario: Secondary-side surge suppression on 48 V PoE-powered telecom equipment front-end DC input rails. IC Role / Device Role / Timing Role: High-energy TVS placed after primary DC-DC converter output to absorb residual line transients. Use Value: Absorbs 1500 W pulses without degradation, preventing latch-up or burnout in downstream PMICs and controllers. |
Use Scenario: Bidirectional overvoltage protection on USB-C CC and SBU lines in portable devices subjected to hot-plug and cable coupling events. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor integrated into Type-C receptacle PCB layout near connector. Use Value: Provides <1 μA leakage at 30.8 V VWM, ensuring minimal impact on CC logic detection while clamping ±15 kV ESD per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA-E3/57T | Same 36 V VWM, but 400 W PPPM; SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients; unsuitable for automotive lightning-level threats | Select when board space is constrained and surge threat level is ≤400 W (e.g., consumer USB ports) |
| 1.5KE36CA | Through-hole DO-201 package; same 36 V VWM and 1500 W rating but slower response due to higher parasitic inductance | Not suitable for high-frequency transient suppression (e.g., >100 MHz ESD); incompatible with SMT-only assembly | Choose only for legacy through-hole designs where rework to SMT is not feasible |
Compared with SMAJ36CA-E3/57T and 1.5KE36CA, SM15T36CAHE3_A/I uniquely combines AEC-Q101 qualification, SMC package low-inductance performance, and full 1500 W surge capacity-making it the only option validated for automotive-grade bidirectional protection in space-constrained SMT layouts.
Availability
SM15T36CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, and telecom power input stages requiring stable component supply with guaranteed AEC-Q101 compliance and long-term production continuity.
Supply support for SM15T36CAHE3_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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification and 1500 W surge capability are mandatory.
FAQ
What does the "CA" suffix indicate in SM15T36CAHE3_A/I?
The "CA" suffix denotes a bidirectional configuration, meaning SM15T36CAHE3_A/I provides symmetrical clamping for both positive and negative transients without polarity dependence. This distinguishes it from unidirectional variants (e.g., SM15T36A), which require correct cathode orientation and only protect against one polarity of surge. SM15T36CAHE3_A/I is used where AC-coupled or floating signal paths demand equal protection in both directions.
Is SM15T36CAHE3_A/I compliant with AEC-Q101, and what does the "HE3" suffix signify?
Yes, SM15T36CAHE3_A/I is fully AEC-Q101 qualified, as confirmed by Vishay's ordering code structure: "HE3" indicates RoHS-compliant construction with AEC-Q101 qualification. This certification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, validating SM15T36CAHE3_A/I for under-hood automotive use where reliability under thermal and electrical stress is critical.
What is the maximum clamping voltage of SM15T36CAHE3_A/I, and at what current is it measured?
The maximum clamping voltage of SM15T36CAHE3_A/I is 49.9 V, measured at 30 A peak pulse current using the standardized 10/1000 μs double-exponential waveform. This value ensures predictable overvoltage limiting during surge events and is verified per Figure 1 and Table on page 2 of Vishay document 88380, confirming SM15T36CAHE3_A/I's ability to protect downstream ICs rated for ≤50 V absolute maximum ratings.
Does SM15T36CAHE3_A/I have polarity markings, and how is it mounted on PCB?
No, SM15T36CAHE3_A/I has no polarity markings because it is a bidirectional TVS diode-both terminals are functionally identical. Mounting requires adherence to Vishay's recommended pad layout: 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to ensure thermal performance and meet RθJL = 15 °C/W specification. The SMC (DO-214AB) package uses matte tin-plated leads solderable per J-STD-002.
How does SM15T36CAHE3_A/I differ from the unidirectional SM15T36AHE3_A/I variant?
SM15T36CAHE3_A/I is bidirectional with symmetrical VBR and clamping in both polarities, while SM15T36AHE3_A/I is unidirectional and features a cathode band for orientation-dependent installation. The "CA" version supports AC signal lines and floating grounds; the "A" version suits DC-biased rails like power supplies or microcontroller I/O where polarity is fixed. Both share identical VWM (30.8 V), PPPM (1500 W), and AEC-Q101 qualification, but circuit placement rules differ fundamentally.
SM15T36CAHE3_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 (SMCJ)
SM15T36CAHE3_A/I FAQ
1.How can I place an order for SM15T36CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T36CAHE3_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 SM15T36CAHE3_A/I reliable?
The price and inventory of SM15T36CAHE3_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 SM15T36CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T36CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T36CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T36CAHE3_A/I?
SM15T36CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T36CAHE3_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 SM15T36CAHE3_A/I?
For technical support, including SM15T36CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T36CAHE3_A/I requirements.
6.How does Aetrix verify that SM15T36CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T36CAHE3_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 SM15T36CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T36CAHE3_A/I?
All SM15T36CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T36CAHE3_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 SM15T36CAHE3_A/I part is unused and in its original packaging.
Return procedure for SM15T36CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T36CAHE3_A/I Tags
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