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Vishay General Semiconductor - Diodes Division SM15T36CA-E3/57T
- Part No.:
- SM15T36CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T36CA-E3/57T.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,234
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Product details
Overview
SM15T36CA-E3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on signal and power lines. It features 36 V standoff voltage (VWM), 49.9 V clamping voltage (VC) at 30 A peak pulse current (IPPM), 1500 W peak pulse power (PPPM) with 10/1000 μs waveform, and operates from −65 °C to +150 °C junction temperature - used in automotive sensor I/O protection and industrial motor drive control circuits.
For engineers reviewing the SM15T36CA-E3/57T datasheet, SM15T36CA-E3/57T pinout, SM15T36CA-E3/57T application, or SM15T36CA-E3/57T equivalent, key selection criteria include bidirectional clamping behavior, 30 A IPPM rating at 49.9 V VC, RoHS-compliant matte tin terminals, MSL Level 1 reflow compatibility, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to provide symmetrical clamping in both polarities, enabling robust protection against lightning-induced surges and inductive switching transients without polarity sensitivity. Its low-inductance SMC package and 15 Ω typical junction-to-lead thermal resistance support fast response and reliable power dissipation under repetitive stress.
The device complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) immunity standards when applied with proper PCB layout - including minimum 8.0 mm × 8.0 mm copper pads per terminal - and exhibits failure mode of short-circuit under overstress conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30.8 V - maximum continuous reverse voltage before clamping begins; defines operating margin below breakdown |
| VBR (Breakdown Voltage) | 34.2–37.8 V at 1 mA - ensures stable triggering threshold across production lot and temperature range |
| VC (Clamping Voltage) | 49.9 V at 30 A (10/1000 μs) - limits transient voltage seen by protected IC/MOSFET during worst-case surge |
| PPPM (Peak Pulse Power) | 1500 W - sustains single high-energy transients such as lightning-induced surges on external I/O lines |
| TJ max. | +150 °C - enables operation in under-hood automotive and industrial environments without derating |
| Package | SMC (DO-214AB) - surface-mount package with 7.75 mm × 6.22 mm footprint and 2.62 mm height for automated placement |
Pinout & Package
SM15T36CA-E3/57T is housed in an SMC (DO-214AB) plastic package with two unmarked terminals - bidirectional construction means neither terminal is designated anode or cathode. The device has no polarity marking and functions identically regardless of orientation in circuit.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | AC Input / Surge Path Entry | Accepts transient energy from either polarity; connects to line under protection (e.g., CAN_H or RS-485 A) |
| Terminal 2 | AC Input / Surge Path Exit | Completes bidirectional clamping path to ground or reference rail; symmetric with Terminal 1 |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential lines (e.g., CAN, RS-485) without polarity concerns |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV line-to-earth) surges when mounted on recommended 8.0 mm × 8.0 mm copper pads |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity handling or baking requirements |
| AEC-Q101 qualification option | HE3/HM3 variants available for automotive applications requiring validated reliability and stress testing |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and ECU input to limit transient excursions beyond ±50 V. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps and ADC front-ends during 12 V system faults. |
Use Scenario: Shielding encoder feedback lines in servo drives from commutation noise and inductive kickback. IC Role / Device Role / Timing Role: Transient shunt across differential A/B channels to suppress >1 kV spikes induced by nearby motor windings. Use Value: Maintains position accuracy by preventing false edge detection in quadrature decoding logic during high-di/dt events. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Guarding Ethernet PHY transformer center-taps against lightning-induced common-mode surges on PoE-powered switches. IC Role / Device Role / Timing Role: Common-mode TVS connected between transformer taps and chassis ground to divert surge current away from PHY IC. Use Value: Enables compliance with IEC 61000-4-5 Ed. 3 Class B (2 kV line-to-ground) without adding series impedance. |
Use Scenario: Safeguarding USB 2.0 D+/D− lines in portable speakers against ESD events during cable insertion. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed directly at USB connector to absorb ±15 kV contact discharge. Use Value: Limits signal distortion (<0.5 pF typical junction capacitance) while meeting IEC 61000-4-2 Level 4 immunity. |
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 (36 V), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy threats (IEC 61000-4-2 only); unsuitable for lightning-level surges | Select when board space is constrained and surge threat level is limited to ESD/EFT only |
| 1.5KE36CA | Higher PPPM (1500 W), through-hole DO-201 package, longer lead inductance (~20 nH vs. ~8 nH for SMC) | Less effective for fast-rising transients (>1 kV/μs); incompatible with automated SMT assembly | Choose only for legacy through-hole designs where rework or manual assembly is acceptable |
Compared with SMAJ36CA and 1.5KE36CA, SM15T36CA-E3/57T delivers optimal balance of high-energy surge capability, low-layout inductance, and full SMT manufacturability - making it preferred for new automotive and industrial designs requiring AEC-Q101 readiness and IEC 61000-4-5 compliance.
Availability
SM15T36CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial motor drive I/O protection, and telecom line interface circuits requiring stable component supply and long-term lifecycle assurance.
Supply support for SM15T36CA-E3/57T 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-grade qualification.
The SM15T Series was developed specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W surge handling and AEC-Q101 compliance are mandatory design requirements.
FAQ
What is the clamping voltage of SM15T36CA-E3/57T at its rated peak pulse current?
The SM15T36CA-E3/57T has a maximum clamping voltage (VC) of 49.9 V when subjected to a 30 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions per JEDEC and ensures predictable overvoltage limiting for protected circuitry downstream of SM15T36CA-E3/57T.
Is SM15T36CA-E3/57T suitable for automotive applications?
Yes - while SM15T36CA-E3/57T itself is commercial-grade (E3 suffix), the identical die is offered in AEC-Q101 qualified versions under HE3/HM3 ordering codes. Its −65 °C to +150 °C operating range, low-inductance SMC package, and failure-safe short-circuit mode make SM15T36CA-E3/57T appropriate for automotive use when paired with qualified variants.
How does the bidirectional configuration of SM15T36CA-E3/57T affect PCB layout?
The bidirectional nature of SM15T36CA-E3/57T eliminates polarity constraints: no cathode band marking exists, and either terminal may connect to line or ground. Layout requires symmetric 8.0 mm × 8.0 mm copper pads per terminal to meet thermal and surge-current handling specs - unlike unidirectional TVS diodes, SM15T36CA-E3/57T needs no orientation verification during placement.
What is the thermal resistance of SM15T36CA-E3/57T, and how does it impact power handling?
SM15T36CA-E3/57T has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W when mounted on recommended pads. This allows sustained 6.5 W power dissipation at 50 °C ambient and supports rapid heat transfer during transient events - critical for maintaining clamping performance across repeated surges.
Does SM15T36CA-E3/57T meet RoHS and lead-free assembly requirements?
Yes - the "E3" suffix denotes RoHS-compliant, lead-free construction with matte tin-plated leads that satisfy J-STD-002 and JESD 22-B102 solderability standards. SM15T36CA-E3/57T is rated for MSL Level 1 and withstands peak reflow temperatures up to 260 °C, making it fully compatible with standard lead-free SMT processes.
SM15T36CA-E3/57T 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-E3/57T FAQ
1.How can I place an order for SM15T36CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T36CA-E3/57T 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-E3/57T reliable?
The price and inventory of SM15T36CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T36CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SM15T36CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T36CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T36CA-E3/57T?
SM15T36CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T36CA-E3/57T 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-E3/57T?
For technical support, including SM15T36CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T36CA-E3/57T requirements.
6.How does Aetrix verify that SM15T36CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T36CA-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of SM15T36CA-E3/57T?
All SM15T36CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T36CA-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for SM15T36CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T36CA-E3/57T Tags
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