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Vishay General Semiconductor - Diodes Division SM15T39CAHE3/57T
- Part No.:
- SM15T39CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T39CAHE3/57T.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,800
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Product details
Overview
SM15T39CAHE3/57T 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 39 V standoff voltage (VWM), 45.7 V clamping voltage (VC) at 28 A peak pulse current (IPPM), 1500 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive applications.
For engineers reviewing the SM15T39CAHE3/57T datasheet, SM15T39CAHE3/57T pinout, SM15T39CAHE3/57T application, or SM15T39CAHE3/57T equivalent, key selection criteria include bidirectional clamping behavior, low clamping ratio (VC/VWM ≈ 1.17), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its CA suffix designation, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM).
The device delivers 1500 W peak pulse power under standardized 10/1000 μs waveform conditions, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation up to TJ = +150 °C in high-impedance surge environments such as I/O line transients induced by inductive switching or lightning coupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 3.3 V–24 V system rails. |
| VBR (min/max) | 37.1 V / 41.0 V - Breakdown occurs within this range at 1.0 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 45.7 V at 28.0 A - Clamped voltage during 10/1000 μs surge; limits downstream IC stress to <46 V under worst-case 1500 W threat. |
| PPPM | 1500 W - Peak pulse power handling capability per JEDEC standard; suitable for lightning-induced surges per IEC 61000-4-5 Level 4. |
| TJ max. | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive environments and industrial enclosures. |
| Package | SMC (DO-214AB) - Surface-mount package with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with IPC-7351B SMC_STD land pattern. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing; supports PPAP documentation. |
Pinout & Package
SM15T39CAHE3/57T uses a two-terminal SMC (DO-214AB) package with no polarity marking for bidirectional operation. Terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No functional distinction between terminals; either side may connect to protected line or ground-enables flexible PCB layout for AC or differential signals. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 combination wave surges up to 4 kV/2 Ω without derating in typical board layouts. |
| Low clamping ratio (VC/VWM = 1.17) | Minimizes overvoltage exposure to downstream components-critical for safeguarding 3.3 V and 5 V logic interfaces. |
| Glass passivated junction | Ensures stable VBR over time and temperature, with <1.0 μA ID at VWM-reduces standby power loss in always-on systems. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without pre-baking; eliminates moisture-related popcorning risk during standard SMT assembly. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain, body control, and ADAS modules requiring extended temperature cycling and long-term reliability. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair in vehicle ECUs against load dump and ESD events per ISO 16750-2 and ISO 10605. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential bus lines to limit transient excursions while preserving signal integrity. Use Value: Maintains CAN communication uptime during 100 V/500 ms load dump events and 8 kV contact ESD pulses without latch-up or degradation. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on sensor output traces to absorb inductive kickback from nearby solenoid actuation. Use Value: Prevents ADC saturation and microcontroller reset caused by >1 kV fast-rising transients on 24 V supply-coupled signal lines. |
| Telecom DSL Line Interface | Consumer USB Port ESD Guard |
Use Scenario: Safeguarding ADSL/VDSL line drivers and receivers connected to external telephone wiring exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level surge absorber located at connector entry point, upstream of integrated line transceivers. Use Value: Clamps 6 kV ring-wave surges to <46 V within 1 ns, preventing damage to PHY ICs rated for only 5.5 V absolute maximum. |
Use Scenario: Adding secondary-level ESD protection on USB 2.0 D+/D− lines in portable devices where internal SoC ESD structures are insufficient. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp that activates before internal transceiver diodes, reducing cumulative ESD wear. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) without performance drift after 1000 strikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Lower PPPM (400 W), higher VWM (33 V), same SMC package but non-AEC-Q101 rated. | Limited to commercial-grade consumer/industrial use; unsuitable for automotive under-hood deployment. | Select when cost sensitivity outweighs automotive qualification and surge energy requirements are ≤400 W. |
| SMCJ33CA | Same 1500 W rating and AEC-Q101 option available, but VWM = 33 V and VC = 53.3 V at 28.3 A-higher clamping voltage than SM15T39CAHE3/57T. | Acceptable for 3.3 V–24 V systems where 53.3 V clamping is tolerable; less optimal for 3.3 V logic protection. | Choose if legacy design uses SMCJ series and board space allows higher VC margin; verify downstream IC withstand ratings. |
Compared with SMAJ33CA and SMCJ33CA, SM15T39CAHE3/57T offers superior clamping performance (45.7 V vs. ≥53.3 V) at identical peak current, tighter VBR tolerance (±5.3% vs. ±5.6%), and guaranteed AEC-Q101 compliance-making it the preferred choice for next-generation automotive and high-reliability industrial designs.
Availability
SM15T39CAHE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, and telecom line cards requiring stable component supply, AEC-Q101 traceability, and 1500 W surge immunity.
Supply support for SM15T39CAHE3/57T 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, efficiency, and application-specific optimization.
The SM15T Series was engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure-balancing low clamping voltage, robust power handling, and AEC-Q101 compliance in compact SMC packaging.
FAQ
What does the "CA" suffix indicate in SM15T39CAHE3/57T?
The "CA" suffix denotes a bidirectional configuration, meaning SM15T39CAHE3/57T provides symmetrical clamping in both forward and reverse directions. This eliminates polarity concerns during PCB layout and makes SM15T39CAHE3/57T ideal for protecting AC-coupled signals, differential buses like CAN or RS-485, and ungrounded power rails where voltage reversals may occur.
Is SM15T39CAHE3/57T suitable for IEC 61000-4-5 surge testing?
Yes, SM15T39CAHE3/57T is rated for 1500 W peak pulse power with a 10/1000 μs waveform, meeting the energy requirements of IEC 61000-4-5 Level 4 (4 kV line-to-earth, 2 Ω source impedance). When mounted on 8.0 mm × 8.0 mm copper pads per datasheet Fig. 2, SM15T39CAHE3/57T reliably clamps transients to 45.7 V without failure.
How does the HE3 suffix affect SM15T39CAHE3/57T's qualification status?
The HE3 suffix confirms that SM15T39CAHE3/57T is RoHS-compliant and AEC-Q101 qualified. This means SM15T39CAHE3/57T has passed rigorous automotive reliability tests-including temperature cycling, high-temperature reverse bias, and ESD-making it approved for use in safety-critical vehicle subsystems such as body control modules and ADAS sensor interfaces.
What is the maximum clamping voltage of SM15T39CAHE3/57T under surge conditions?
The maximum clamping voltage of SM15T39CAHE3/57T is 45.7 V at 28.0 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per JEDEC standards and represents the upper bound of voltage seen by protected circuitry during worst-case surge events-critical for ensuring compatibility with 3.3 V, 5 V, and 24 V interface ICs.
Can SM15T39CAHE3/57T replace unidirectional TVS diodes in existing designs?
SM15T39CAHE3/57T can replace unidirectional TVS diodes only if the circuit topology supports bidirectional clamping-such as across differential pairs or floating supply rails. It must not be substituted in unidirectional configurations (e.g., cathode-to-rail) without verifying that reverse conduction will not disrupt system biasing or cause unintended current paths in the design containing SM15T39CAHE3/57T.
SM15T39CAHE3/57T 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T39CAHE3/57T FAQ
1.How can I place an order for SM15T39CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T39CAHE3/57T 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 SM15T39CAHE3/57T reliable?
The price and inventory of SM15T39CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T39CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T39CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T39CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T39CAHE3/57T?
SM15T39CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T39CAHE3/57T 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 SM15T39CAHE3/57T?
For technical support, including SM15T39CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T39CAHE3/57T requirements.
6.How does Aetrix verify that SM15T39CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T39CAHE3/57T 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 SM15T39CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T39CAHE3/57T?
All SM15T39CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T39CAHE3/57T, 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 SM15T39CAHE3/57T part is unused and in its original packaging.
Return procedure for SM15T39CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T39CAHE3/57T Tags
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