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Vishay General Semiconductor - Diodes Division SM15T39CAHM3_A/I
- Part No.:
- SM15T39CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T39CAHM3_A/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,141
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Product details
Overview
SM15T39CAHM3_A/I 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), 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR), and clamps to ≤53.9 V at 28.0 A peak pulse current. 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 SM15T39CAHM3_A/I datasheet, SM15T39CAHM3_A/I pinout, SM15T39CAHM3_A/I application, or SM15T39CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and verified 1500 W surge handling per IEC 61000-4-5 Level 4.
Technical Context
The SM15T39CAHM3_A/I operates as a voltage-clamping device with symmetrical avalanche breakdown in both directions, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its low-inductance SMC package and glass-passivated junction support fast response (<1 ns) to transients up to 28.0 A (10/1000 μs).
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, with maximum junction temperature of +150 °C and MSL Level 1 rating (260 °C peak reflow). It sustains non-repetitive forward surge current up to 200 A (10 ms half-sine) only in unidirectional variants - not applicable here due to bidirectional configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets upper limit for normal circuit operation. |
| VBR (min/max) | 37.1 V / 41.0 V at 1.0 mA test current - Confirmed symmetric breakdown threshold defining clamping onset in both polarities. |
| VC @ IPPM | 53.9 V at 28.0 A (10/1000 μs) - Clamped voltage during worst-case surge; determines protected IC's maximum stress level. |
| PPPM | 1500 W - Peak pulse power handling per IEC 61000-4-5; validates suitability for lightning surge immunity up to Level 4. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments with high ambient thermal load. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
Pinout & Package
SM15T39CAHM3_A/I is a two-terminal bidirectional TVS diode in SMC (DO-214AB) package. No polarity marking is present on the device body, as conduction occurs identically in both directions. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Either terminal serves as input/output for surge current; no directional bias required - simplifies PCB layout for differential or AC lines. |
| Case (cathode band absent) | Non-functional mechanical reference | No electrical connection; absence of band confirms bidirectional construction and eliminates orientation-dependent placement errors. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validates robustness against IEC 61000-4-5 lightning surges and industrial motor-switching transients without degradation. |
| AEC-Q101 qualified (HM3 suffix) | Confirms reliability for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| Halogen-free, RoHS-compliant | Meets environmental compliance requirements for global OEM supply chains and end-of-life recycling mandates. |
| Low inductance & fast response | Enables sub-nanosecond clamping to protect high-speed interfaces (e.g., CAN FD, LIN, sensor analog outputs) from ESD and EFT. |
Applications
| Automotive Sensor Protection | Industrial I/O Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine bays and chassis modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp absorbing ±1 kV ESD and 0.5 kV lightning surges coupled onto sensor harnesses. Use Value: Prevents latch-up or permanent damage to downstream ADCs and microcontrollers while maintaining signal integrity below 53.9 V during transients. |
Use Scenario: Safeguarding RS-485, CAN, or digital I/O ports in PLCs, HMIs, and motor drives exposed to factory floor noise. IC Role / Device Role / Timing Role: Symmetric transient suppression on differential pairs or single-ended control lines subject to inductive kickback from solenoids and contactors. Use Value: Ensures system uptime by limiting fault voltage to <54 V during 28 A surges, avoiding false triggering or communication lockup. |
| Telecom Power Interface | Consumer Device DC Input Protection |
Use Scenario: Shielding 12 V/24 V DC power inputs of base station radios and optical line terminals from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converters and LDOs, coordinating with upstream fuses and MOVs. Use Value: Withstands repeated 1500 W pulses without parametric shift, supporting long-term field deployment in harsh telecom environments. |
Use Scenario: Hardening USB-C PD input stages and battery charging circuits in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Secondary-level transient absorber after primary common-mode chokes, targeting fast-rising ESD events on external ports. Use Value: Delivers <1 ns response and <54 V clamping to preserve USB PD controller logic and prevent brownout resets during user-handling ESD. |
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 | 600 W peak power (10/1000 μs), 33 V VWM, SMA package (smaller thermal mass) | Limited to lower-energy threats (IEC 61000-4-2 ESD only); unsuitable for lightning-level surges | Select when board space is constrained and surge threat level is limited to ±8 kV contact ESD. |
| SMCJ33CA | 1500 W peak power, identical VWM/VBR/VC, but commercial-grade (non-AEC-Q101) and halogen-containing (M3/E3) | Lacks automotive qualification and halogen-free compliance; acceptable for industrial/commercial use only | Choose for cost-sensitive non-automotive designs where AEC-Q101 and halogen-free status are not mandated. |
Compared with SMAJ33CA and SMCJ33CA, SM15T39CAHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free construction, and full 1500 W surge capability in a single SMC package - making it the only option qualified for automotive front-end power and signal protection where regulatory and reliability requirements overlap.
Availability
SM15T39CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom power interface designs requiring stable component supply, long-lifecycle assurance, and traceable halogen-free sourcing.
Supply support for SM15T39CAHM3_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, MOSFETs, and protection devices with emphasis on high-reliability, automotive-qualified, and industry-standard solutions.
The SM15T Series was engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure - delivering 1500 W surge capability with AEC-Q101 validation and halogen-free compliance in standard SMC packaging.
FAQ
What does the "HM3" suffix indicate in SM15T39CAHM3_A/I?
The "HM3" suffix in SM15T39CAHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms the device meets automotive reliability standards (including temperature cycling, HTRB, and ESD testing) and environmental regulations for lead-free and halogen-free manufacturing - critical for Tier 1 automotive suppliers and global OEMs.
Is SM15T39CAHM3_A/I unidirectional or bidirectional?
SM15T39CAHM3_A/I is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping in both polarities, with identical VBR (37.1–41.0 V), VC (53.9 V), and IPPM (28.0 A) characteristics regardless of voltage polarity - ideal for protecting AC-coupled signals, differential buses, or floating power rails.
What is the maximum clamping voltage of SM15T39CAHM3_A/I under surge conditions?
The maximum clamping voltage of SM15T39CAHM3_A/I is 53.9 V at 28.0 A peak pulse current with a 10/1000 μs waveform. This value is measured per Fig. 1 and Fig. 3 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Does SM15T39CAHM3_A/I require orientation-specific PCB placement?
No - SM15T39CAHM3_A/I has no polarity marking and is functionally symmetrical. The SMC package lacks a cathode band, confirming its bidirectional nature. PCB layout requires no orientation alignment, reducing assembly error risk and simplifying routing for differential or AC signal paths.
How does SM15T39CAHM3_A/I compare to standard SMAJ or SMCJ series TVS diodes?
SM15T39CAHM3_A/I matches SMCJ33CA in 1500 W rating and clamping performance but adds AEC-Q101 qualification and halogen-free materials. Unlike SMAJ33CA (600 W), it supports higher-energy threats like IEC 61000-4-5 Level 4. Its VWM = 33.3 V and VBR = 37.1–41.0 V are optimized for 3.3 V–36 V system rails, offering tighter margin than generic alternatives.
SM15T39CAHM3_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:
- -
- 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 (SMC)
SM15T39CAHM3_A/I FAQ
1.How can I place an order for SM15T39CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T39CAHM3_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 SM15T39CAHM3_A/I reliable?
The price and inventory of SM15T39CAHM3_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 SM15T39CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T39CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T39CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T39CAHM3_A/I?
SM15T39CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T39CAHM3_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 SM15T39CAHM3_A/I?
For technical support, including SM15T39CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T39CAHM3_A/I requirements.
6.How does Aetrix verify that SM15T39CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T39CAHM3_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 SM15T39CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T39CAHM3_A/I?
All SM15T39CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T39CAHM3_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 SM15T39CAHM3_A/I part is unused and in its original packaging.
Return procedure for SM15T39CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T39CAHM3_A/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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