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Vishay General Semiconductor - Diodes Division SM15T36CA-E3/9AT
- Part No.:
- SM15T36CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T36CA-E3/9AT.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,129
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Product details
Overview
SM15T36CA-E3/9AT 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), 49.9 V clamping voltage at 30 A IPPM, and operating junction temperature up to +150 °C. 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 SM15T36CA-E3/9AT datasheet, SM15T36CA-E3/9AT pinout, SM15T36CA-E3/9AT application, or SM15T36CA-E3/9AT equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (1.39), RoHS-compliant commercial-grade packaging, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) of 38.0–42.0 V measured at 1 mA IT, and clamps transients to ≤49.9 V at 30 A peak pulse current. Its low dynamic impedance ensures fast response to sub-microsecond threats while maintaining stable leakage (<1 μA at 30.8 V).
The device uses a glass-passivated silicon junction housed in an SMC package with matte tin-plated leads, meeting J-STD-002 solderability and JESD22-B102 reliability standards. Thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), enabling operation up to 150 °C junction temperature without derating on minimum recommended copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30.8 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 38.0–42.0 V at 1 mA - Confirmed symmetrical conduction threshold in both directions; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 49.9 V at 30 A (10/1000 μs) - Peak voltage seen by protected circuit under worst-case surge; enables robust IC-level protection. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains high-energy transients like lightning surges (IEC 61000-4-5) without failure; validated per Fig. 1 derating curve. |
| TJ max. | +150 °C - Enables use in under-hood automotive and industrial environments without thermal shutdown or parameter drift. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with IPC-7351B land patterns. |
Pinout & Package
SM15T36CA-E3/9AT is a two-terminal bidirectional TVS diode in SMC (DO-214AB) package. No polarity marking is present on the case; terminals are functionally identical and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve as equal-clamping bidirectional paths; no cathode band or polarity designation required. |
| Case (body) | Thermal and mechanical interface | Plastic molding provides UL 94 V-0 flammability rating; copper pad mounting required for thermal performance per spec. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 1500 W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4 kV line-to-earth) surge immunity requirements with margin. |
| Glass-passivated junction | Ensures long-term stability and low leakage (<1 μA) across temperature and humidity stress conditions. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without popcorn cracking or delamination; eliminates pre-bake requirement. |
| RoHS-compliant E3 suffix | Meets EU Directive 2011/65/EU and China RoHS II; halogen-free option available via M3 suffix. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential or single-ended signal lines upstream of receiver inputs. Use Value: Limits transient voltage to ≤49.9 V, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs while surviving >100,000 surge cycles. |
Use Scenario: Safeguarding PLC digital input modules and fieldbus terminations (RS-485, Profibus) against ESD and lightning surges entering via long cable runs. IC Role / Device Role / Timing Role: Primary front-end surge suppression element mounted at connector entry point, before isolation or conditioning stages. Use Value: Absorbs 1500 W pulses without degradation, maintaining <1 μA leakage at 30.8 V to avoid false triggering in high-impedance sensing circuits. |
| Consumer Power Adapter Input | Telecom Line Card Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters and USB PD chargers exposed to mains-borne transients. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC output rails to clamp overshoot during regulation loop instability or hot-plug events. Use Value: Clamps 30 A surges within 1 ns response time, limiting output excursion to 49.9 V and preserving downstream USB-C controller integrity. |
Use Scenario: Protecting Ethernet PHYs and DSL line drivers from induced surges on twisted-pair telecom lines in central office and CPE equipment. IC Role / Device Role / Timing Role: Differential-mode suppressor bridging tip/ring or pair conductors, referenced to local ground plane. Use Value: Symmetrical 38–42 V breakdown ensures balanced clamping on both conductors, minimizing common-mode injection into sensitive analog front-ends. |
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 | Lower PPPM (400 W), same VWM (36 V), higher VC (60.0 V at 6.7 A), SMA package (smaller thermal mass) | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy ESD and EFT events | Select when board space is constrained and surge threat level is ≤1 kV line-to-ground. |
| SMCJ36CA | Same PPPM (1500 W), identical VWM/VC specs, but larger SMC package with 10% higher RθJA (82.5 °C/W) | Requires larger PCB pad area; slightly reduced thermal margin at high ambient temperatures | Prefer when legacy SMCJ footprint compatibility is required and thermal design allows for 7.5 °C/W higher junction rise. |
Compared with SMAJ36CA and SMCJ36CA, SM15T36CA-E3/9AT delivers identical surge handling in a thermally optimized SMC package with verified 75 °C/W RθJA, making it the preferred choice for automotive and industrial designs requiring sustained reliability under repeated transient stress.
Availability
SM15T36CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom line card protection requiring stable component supply and full RoHS compliance.
Supply support for SM15T36CA-E3/9AT 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, power efficiency, and automotive qualification.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments, targeting AEC-Q101-qualified automotive systems and industrial equipment demanding 1500 W surge immunity and extended temperature operation.
FAQ
What does the "CA" suffix indicate in SM15T36CA-E3/9AT?
The "CA" suffix denotes a bidirectional configuration, meaning SM15T36CA-E3/9AT clamps voltage transients equally in both polarities-unlike unidirectional variants ending in "A". This makes SM15T36CA-E3/9AT ideal for protecting AC-coupled signals, differential buses, or floating nodes where polarity reversal may occur during surge events.
Is SM15T36CA-E3/9AT qualified for automotive applications?
SM15T36CA-E3/9AT is RoHS-compliant commercial grade (E3 suffix); AEC-Q101 qualification requires the HE3 suffix variant (e.g., SM15T36CAHE3_A/I). While SM15T36CA-E3/9AT shares identical electrical and thermal specs, only the HE3 version carries formal automotive qualification documentation and test reports per AEC-Q101 Rev D.
What is the maximum clamping voltage of SM15T36CA-E3/9AT under surge conditions?
The maximum clamping voltage of SM15T36CA-E3/9AT is 49.9 V when subjected to a 10/1000 μs waveform at 30 A peak pulse current (IPPM), as specified in the Vishay datasheet Document Number 88380, page 2. This value is guaranteed across temperature and lifetime under defined test conditions.
How does the SMC (DO-214AB) package of SM15T36CA-E3/9AT compare to SMA or SMB packages?
SM15T36CA-E3/9AT's SMC package offers 2.5× higher peak pulse power (1500 W) than SMAJ-class devices in SMA packages (400 W) and superior thermal dissipation vs. SMB (600 W), due to larger copper pad area and lower RθJL (15 °C/W). Its 7.75 mm × 6.22 mm footprint supports higher surge energy without layout redesign.
Can SM15T36CA-E3/9AT be used in place of a unidirectional TVS like SM15T36A-E3/9AT?
No-SM15T36CA-E3/9AT is bidirectional and lacks polarity marking, while SM15T36A-E3/9AT is unidirectional with cathode band identification. Substituting them requires circuit review: bidirectional use demands symmetrical placement, whereas unidirectional devices require correct orientation relative to DC bias. Interchange alters clamping behavior and may compromise protection.
SM15T36CA-E3/9AT 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T36CA-E3/9AT FAQ
1.How can I place an order for SM15T36CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T36CA-E3/9AT 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 SM15T36CA-E3/9AT reliable?
The price and inventory of SM15T36CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T36CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T36CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T36CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T36CA-E3/9AT?
SM15T36CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T36CA-E3/9AT 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 SM15T36CA-E3/9AT?
For technical support, including SM15T36CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T36CA-E3/9AT requirements.
6.How does Aetrix verify that SM15T36CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T36CA-E3/9AT 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 SM15T36CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T36CA-E3/9AT?
All SM15T36CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T36CA-E3/9AT, 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 SM15T36CA-E3/9AT part is unused and in its original packaging.
Return procedure for SM15T36CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T36CA-E3/9AT Tags
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