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Vishay General Semiconductor - Diodes Division SM15T39CA-M3/57T
- Part No.:
- SM15T39CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T39CA-M3/57T.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,005
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Product details
Overview
SM15T39CA-M3/57T 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), 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR), and 53.9 V maximum clamping voltage (VC) at 28.0 A peak pulse current. It protects signal lines in automotive sensor units against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T39CA-M3/57T datasheet, SM15T39CA-M3/57T pinout, SM15T39CA-M3/57T application, or SM15T39CA-M3/57T equivalent, key selection considerations include bidirectional clamping capability, 1500 W surge rating with low clamping ratio (VC/VBR ≈ 1.37), halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness via HM3 variant.
Technical Context
This TVS diode operates in bidirectional mode with symmetrical breakdown and clamping characteristics in both polarities, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable leakage performance and robust surge endurance under repeated transient stress.
The device delivers 53.9 V clamping at 28.0 A (10/1000 μs), achieving a clamping ratio of 1.37–1.45 relative to its 37.1–41.0 V VBR, and exhibits low thermal resistance (RθJL = 15 °C/W) for efficient heat transfer to PCB copper pads during high-energy events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before significant leakage; defines safe signal swing margin for protected line. |
| VBR (min/max) | 37.1 V / 41.0 V at 1.0 mA - Confirmed breakdown threshold range; ensures reliable turn-on above normal operating voltage. |
| VC @ IPPM | 53.9 V at 28.0 A (10/1000 μs) - Clamped voltage during worst-case surge; determines maximum stress on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 μs waveform; qualifies for lightning and motor-switching transient standards. |
| RθJL | 15 °C/W - Junction-to-lead thermal resistance; enables effective heat conduction to PCB traces without heatsink. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant (M3 suffix), matte tin-plated leads, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; accepts surge current in either polarity during overvoltage event. |
| Cathode | Transient current entry (bidirectional) | Second terminal of symmetrical junction; no polarity marking on CA devices; both terminals function identically. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables compliance with ISO 7637-2 Pulse 3b and IEC 61000-4-5 Level 3 surge immunity requirements. |
| Low clamping voltage (53.9 V @ 28 A) | Reduces voltage overshoot on protected lines by >30% vs. comparable 36 V-rated TVS, improving system-level ESD/surge margin. |
| Glass-passivated chip junction | Ensures <1.0 μA reverse leakage at VWM, minimizing standby power loss in battery-powered sensor interfaces. |
| Halogen-free, RoHS-compliant (M3) | Meets IPC-1752A material declaration requirements and supports green manufacturing initiatives without compromising surge robustness. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and microcontroller GPIOs in engine control modules exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp limiting transient excursions to ≤53.9 V during 10/1000 μs surges up to 28 A. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V automotive MCUs while maintaining signal integrity across 12 V supply rails. |
Use Scenario: Safeguarding differential CAN_H/CAN_L lines in factory automation nodes subject to EFT bursts and inductive switching noise. IC Role / Device Role / Timing Role: Symmetrical clamping element placed across bus pair to suppress common-mode transients without disrupting DC bias. Use Value: Maintains CAN FD bit timing integrity by limiting bus voltage deviation to <±54 V, avoiding recessive-bit corruption during 4 kV EFT events. |
| Telecom Power Input Stage | Consumer Appliance Motor Control |
Use Scenario: Guarding 48 V DC input of PoE-powered network switches against lightning-induced surges entering via Ethernet magnetics. IC Role / Device Role / Timing Role: Primary front-end TVS absorbing >90% of 1500 W surge energy before it reaches DC/DC converter input stage. Use Value: Eliminates need for secondary MOV-based protection, reducing BOM count and PCB area while meeting UL 60950-1 surge withstand requirements. |
Use Scenario: Shielding microcontroller I/O and gate drivers in smart washing machine control boards from back-EMF spikes generated by BLDC motor commutation. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) shunt device clamping induced spikes on 5 V logic rails and 12 V driver supplies. Use Value: Extends MCU lifetime by suppressing >1000 repetitive 200 V/10 A transients per cycle, validated per IEC 61000-4-4 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Lower PPPM (600 W), higher VC (58.1 V @ 10.3 A), SMB package (smaller footprint, lower thermal mass) | Insufficient for ISO 7637-2 Pulse 5a (load dump); suitable only for low-energy ESD/EFT zones | Select when space-constrained and surge threat is limited to IEC 61000-4-2/4-4, not lightning or load-dump. |
| SMCJ36CA | Same SMC package, identical VWM/VBR, but 1500 W rating at 36 V nominal; VC = 58.1 V @ 25.9 A (clamping ratio ~1.61 vs. SM15T39CA-M3/57T's 1.37) | Higher clamping voltage reduces margin for 3.3 V/5 V ICs; less effective for low-voltage rail protection | Prefer SM15T39CA-M3/57T where tighter clamping (53.9 V) is required to protect modern low-voltage ASICs. |
Compared with SMBJ36CA and SMCJ36CA, SM15T39CA-M3/57T provides superior clamping efficiency (lower VC/VBR ratio) and verified suitability for automotive load-dump scenarios, making it the optimal choice for 33–39 V system rails requiring robust, low-leakage bidirectional protection.
Availability
SM15T39CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, and telecom power input stages requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification path.
Supply support for SM15T39CA-M3/57T 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 is designed specifically for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where 1500 W surge handling and low clamping voltage are critical.
FAQ
What is the clamping voltage of SM15T39CA-M3/57T at its rated peak pulse current?
The SM15T39CA-M3/57T has a maximum clamping voltage (VC) of 53.9 V at 28.0 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and reflects the actual voltage seen by protected circuitry during worst-case surge conditions. The SM15T39CA-M3/57T maintains this clamping performance across its full operating temperature range (−65 °C to +150 °C).
Is SM15T39CA-M3/57T suitable for automotive applications requiring AEC-Q101 qualification?
The SM15T39CA-M3/57T itself is commercial-grade (M3 suffix), but Vishay offers AEC-Q101 qualified variants under ordering codes HM3 (e.g., SM15T39CAHM3/57T). The SM15T39CA-M3/57T shares identical electrical and mechanical specifications with its HM3 counterpart except for qualification testing-making it suitable for pre-qualification prototyping or non-safety-critical automotive subsystems where full AEC-Q101 is not mandated.
How does the bidirectional design of SM15T39CA-M3/57T affect its use in differential signal lines?
The SM15T39CA-M3/57T's symmetrical bidirectional structure allows it to be placed directly across differential pairs (e.g., CAN_H/CAN_L) without polarity concerns, clamping both positive and negative transients equally. Unlike unidirectional TVS diodes, the SM15T39CA-M3/57T eliminates risk of incorrect orientation during assembly and ensures consistent protection regardless of transient polarity-critical for noise-immune communication interfaces.
What is the thermal resistance from junction to lead (RθJL) for SM15T39CA-M3/57T, and why does it matter?
The SM15T39CA-M3/57T has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, as specified in Vishay document 88380. This low value enables rapid heat transfer from the silicon die to the PCB copper pads during transient events, preventing thermal runaway during repetitive surges. For the SM15T39CA-M3/57T, this supports sustained operation under IEC 61000-4-5 burst testing without derating at ambient temperatures up to +85 °C.
Does SM15T39CA-M3/57T require additional series impedance for optimal protection performance?
No external series impedance is required for basic clamping functionality of the SM15T39CA-M3/57T, as it operates as a shunt protector. However, for high-frequency transient filtering (e.g., >100 MHz ESD), pairing the SM15T39CA-M3/57T with a small ferrite bead or RC network upstream improves high-frequency attenuation without affecting its 1500 W low-frequency surge capability. The SM15T39CA-M3/57T's low inductance design minimizes interaction with such external elements.
SM15T39CA-M3/57T 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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 28A
- 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)
SM15T39CA-M3/57T FAQ
1.How can I place an order for SM15T39CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T39CA-M3/57T 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 SM15T39CA-M3/57T reliable?
The price and inventory of SM15T39CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T39CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SM15T39CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T39CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T39CA-M3/57T?
SM15T39CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T39CA-M3/57T 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 SM15T39CA-M3/57T?
For technical support, including SM15T39CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T39CA-M3/57T requirements.
6.How does Aetrix verify that SM15T39CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T39CA-M3/57T 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 SM15T39CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SM15T39CA-M3/57T?
All SM15T39CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T39CA-M3/57T, 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 SM15T39CA-M3/57T part is unused and in its original packaging.
Return procedure for SM15T39CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T39CA-M3/57T Tags
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