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Vishay General Semiconductor - Diodes Division SM15T39AHM3_A/I
- Part No.:
- SM15T39AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T39AHM3_A/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,429
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Product details
Overview
SM15T39AHM3_A/I from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) in SMC (DO-214AB) package, with 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR at 1 mA), and 53.9 V clamping voltage (VC) at 28.0 A peak pulse current (IPPM). It protects MOSFETs and sensor signal lines in automotive powertrain control units against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T39AHM3_A/I datasheet, SM15T39AHM3_A/I pinout, SM15T39AHM3_A/I application, or SM15T39AHM3_A/I equivalent, key selection criteria include clamping performance under 10/1000 μs surge, AEC-Q101 qualification status, unidirectional polarity marking, thermal resistance (RθJA = 75 °C/W), and halogen-free RoHS compliance per ordering suffix HM3.
Technical Context
The SM15T39AHM3_A/I uses a glass-passivated silicon junction to achieve low dynamic impedance and fast response (<1 ps) to ESD and surge events. Its unidirectional configuration enables cathode-banded polarity identification and integration into DC-biased protection paths without reverse conduction.
Rated for 1500 W peak pulse power (10/1000 μs), it operates within -65 °C to +150 °C junction temperature range and features MSL Level 1 moisture sensitivity with 260 °C reflow peak. The device fails short-circuit under overstress, supporting predictable system-level fault containment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets DC bias margin for protected line. |
| VBR (min/max) | 37.1 V / 41.0 V at IT = 1 mA - Confirmed breakdown threshold ensures reliable turn-on during transients above nominal rail. |
| VC @ IPPM | 53.9 V at 28.0 A (10/1000 μs) - Clamping voltage defines maximum stress imposed on downstream ICs during surge. |
| PPPM | 1500 W - Peak pulse power rating determines survivability against lightning-induced surges per IEC 61000-4-5. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance informs PCB copper pad sizing (8.0 mm × 8.0 mm recommended) for thermal derating. |
| TJmax | +150 °C - Maximum junction temperature enables operation in under-hood automotive environments with sustained ambient up to +125 °C. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; forms current loop during clamping. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 3.3 V or 5 V rail); band-marked end accepts positive surge relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements including HTOL, TCT, and ESD HBM ≥ 8 kV. |
| 1500 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 (4 kV) surges on 2 Ω source impedance without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage margin between clamping and breakdown, improving protection headroom for 3.3 V/5 V logic interfaces. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without preconditioning or baking; compatible with standard SMT lines. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Fulfills EU Directive 2011/65/EU and IPC-4101D/121 requirements for green manufacturing and end-of-life disposal. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive I/O Protection |
|---|---|
|
Use Scenario: Protecting 12 V CAN FD transceiver supply rails and LIN bus lines in engine control modules exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND to clamp positive transients while blocking reverse conduction. Use Value: Prevents latch-up or permanent damage to transceivers during ISO 7637-2 Pulse 5a (load dump) events up to 60 V. |
Use Scenario: Safeguarding analog input channels of PLC analog I/O modules connected to 4–20 mA current loops near contactors and solenoids. IC Role / Device Role / Timing Role: Standoff-clamp TVS on signal line to ground, absorbing inductive kickback from relay coils switching at ≤10 Hz. Use Value: Limits transient overshoot to <54 V, preserving ADC front-end integrity and avoiding overvoltage shutdown in 24 V systems. |
| Consumer Sensor Hub Protection | Telecom Base Station DC Feeds |
|
Use Scenario: Shielding I²C and SPI signal lines of MEMS inertial sensors in automotive ADAS camera modules from ESD and board-level coupling. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on bidirectional data lines referenced to local ground plane. Use Value: Maintains signal integrity below 100 MHz while suppressing ±8 kV HBM ESD per IEC 61000-4-2 without distorting rise/fall times. |
Use Scenario: Guarding -48 V DC power feeds entering telecom base station cabinets from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: High-power unidirectional TVS on negative rail, configured with series fuse for coordinated overcurrent protection. Use Value: Absorbs 1500 W surges per ITU-T K.20/21, enabling compliance with GR-1089-CORE Zone 3 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Lower PPPM (400 W), higher VC (53.3 V @ 7.5 A), SMA package (smaller footprint, lower IPPM). | Not AEC-Q101 qualified; suitable for commercial-grade consumer or industrial boards where space is constrained. | Select when cost and size outweigh automotive reliability requirements and surge threat level is limited to IEC 61000-4-2 only. |
| 1.5KE33A | Higher VC (53.3 V @ 28.3 A), axial DO-201 package, no MSL rating, non-halogen-free option only. | Lacks surface-mount compatibility and automotive qualification; used in legacy through-hole designs or high-voltage AC inputs. | Choose only for retrofit or repair of existing DO-201-based designs where board rework is not feasible. |
Compared with SMAJ33A-E3/57T and 1.5KE33A, SM15T39AHM3_A/I delivers higher surge robustness (1500 W vs. 400 W/1500 W), guaranteed AEC-Q101 qualification, halogen-free compliance, and optimized SMC thermal performance-making it the preferred choice for new automotive and industrial SMT designs requiring long-term reliability.
Availability
SM15T39AHM3_A/I is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive I/O protection, and telecom DC feed applications requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for SM15T39AHM3_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, TVS devices, and optoelectronics with emphasis on high-reliability and automotive-grade components.
The SM15T Series was engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure applications where failure modes must be predictable and robust.
FAQ
What is the clamping voltage of SM15T39AHM3_A/I at its rated peak pulse current?
The SM15T39AHM3_A/I has a maximum clamping voltage (VC) of 53.9 V when subjected to a 10/1000 μs waveform at 28.0 A peak pulse current (IPPM). This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T39AHM3_A/I qualified to AEC-Q101 standards?
Yes, SM15T39AHM3_A/I is AEC-Q101 qualified. The "HM3" suffix indicates halogen-free, RoHS-compliant construction with full AEC-Q101 stress testing including high-temperature operating life (HTOL), temperature cycling (TCT), and human-body model (HBM) ESD ≥ 8 kV.
What does the "_A/I" suffix mean in SM15T39AHM3_A/I?
The "_A/I" suffix in SM15T39AHM3_A/I denotes packaging: "A" indicates tape-and-reel format with 7-inch reel diameter, and "I" specifies a base quantity of 3500 units per reel. This matches Vishay's ordering code convention in Document 88380, Section "ORDERING INFORMATION".
How does SM15T39AHM3_A/I differ from bidirectional variants like SM15T39CA?
SM15T39AHM3_A/I is unidirectional with cathode band marking and blocks reverse current, whereas SM15T39CA is bidirectional with no polarity marking and clamps in both directions. The unidirectional version offers lower leakage and tighter VBR tolerance, making it ideal for DC-biased rails like 12 V or 24 V supplies.
What is the thermal resistance of SM15T39AHM3_A/I, and how does it affect PCB layout?
SM15T39AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures under repeated surges, designers must allocate sufficient copper area and avoid thermal isolation of the SMC package.
SM15T39AHM3_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:
- 1
- Bidirectional Channels:
- -
- 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 (SMC)
SM15T39AHM3_A/I FAQ
1.How can I place an order for SM15T39AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T39AHM3_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 SM15T39AHM3_A/I reliable?
The price and inventory of SM15T39AHM3_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 SM15T39AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T39AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T39AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T39AHM3_A/I?
SM15T39AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T39AHM3_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 SM15T39AHM3_A/I?
For technical support, including SM15T39AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T39AHM3_A/I requirements.
6.How does Aetrix verify that SM15T39AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T39AHM3_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 SM15T39AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T39AHM3_A/I?
All SM15T39AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T39AHM3_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 SM15T39AHM3_A/I part is unused and in its original packaging.
Return procedure for SM15T39AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T39AHM3_A/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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