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Vishay General Semiconductor - Diodes Division SM15T30CAHM3/H
- Part No.:
- SM15T30CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30CAHM3/H.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,371
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Product details
Overview
SM15T30CAHM3/H 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), 30 V standoff voltage (VWM), and clamping voltage of 41.5 V at 36 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 SM15T30CAHM3/H datasheet, SM15T30CAHM3/H pinout, SM15T30CAHM3/H application, or SM15T30CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and verified 1500 W surge handling per JEDEC-standard waveform.
Technical Context
This device operates as a voltage-clamped overvoltage protection element with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable leakage performance (<1.0 μA at 25.6 V) and low inductance for fast response to sub-microsecond transients.
The SM15T30CAHM3/H is thermally rated for TJ = −65 °C to +150 °C and features RθJA = 75 °C/W on standard 8.0 mm × 8.0 mm copper pads. Its failure mode under overstress is a short circuit, consistent with industrial safety requirements for fail-safe protection devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 25.6 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 28.5 V / 31.5 V - Breakdown voltage range at 1.0 mA test current, defining conduction onset tolerance |
| VC @ IPPM | 41.5 V at 36 A - Clamping voltage during 10/1000 μs surge, limiting downstream voltage stress |
| PPPM | 1500 W - Peak pulse power handling capacity, enabling robust protection against lightning surges |
| TJ max | +150 °C - Maximum junction temperature, supporting operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 8.13 mm footprint and 2.06 mm height for automated assembly |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
SM15T30CAHM3/H uses the SMC (DO-214AB) package: a surface-mount, bidirectional two-terminal device with no polarity marking. Terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, meeting JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical PN junction; interchangeable with cathode in bidirectional configuration |
| Cathode | Terminal B | Other side of symmetrical PN junction; no band marking distinguishes terminals for CA-suffix devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly mounted on 8 mm × 8 mm copper pads |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot during transients, reducing stress on protected ICs like CAN transceivers or ADC front-ends |
| AEC-Q101 qualified & halogen-free | Meets automotive supply chain requirements for reliability and environmental compliance (RoHS + JESD 201 Class 2) |
| MSL Level 1 (260 °C peak) | Allows standard reflow soldering without moisture sensitivity handling or baking |
Applications
| Automotive Sensor Protection | Industrial I/O Line Protection |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and analog sensor outputs (e.g., pressure, temperature) in engine control modules from load dump and inductive switching noise. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point to shunt surge energy before reaching interface ICs. Use Value: Prevents latch-up or permanent damage to microcontrollers and transceivers by limiting transient voltage to ≤41.5 V during 36 A surges. | Use Scenario: Safeguarding PLC digital input channels connected to field wiring exposed to motor drive noise and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional overvoltage clamp across differential or single-ended inputs to absorb common-mode and differential-mode transients. Use Value: Maintains signal integrity and prevents false triggering by clamping transients within 1 ns response time while surviving repeated 1500 W pulses. |
| Telecom Power Rail Protection | Consumer Device USB Port Protection |
Use Scenario: Shielding 24 V DC power inputs of remote radio units and base station controllers from induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary surge suppression device placed upstream of DC-DC converters and LDOs to prevent overvoltage propagation. Use Value: Withstands 200 A IFSM (unidirectional) and maintains <1.0 μA leakage at 25.6 V, ensuring minimal standby power impact. | Use Scenario: Hardening USB 2.0 data lines (D+/D−) and VBUS in smart home hubs against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS integrated into board-level ESD protection network alongside polymer PTCs. Use Value: Delivers 1500 W surge capability without compromising signal rise time, validated for 8/20 μs waveform clamping at 53.5 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA | 600 W peak pulse power (10/1000 μs); same VWM (25.6 V) but higher VC (48.4 V at 12.3 A) | Limited to lower-energy threats (IEC 61000-4-2 ESD only); not suitable for lightning-level surges | Select SMAJ30CA only when space constraints prohibit SMC footprint and surge threat level is ≤600 W |
| SMCJ33CA | 1500 W rating; higher VWM (28.2 V) and VC (53.3 V at 28 A); same SMC package | Clamps at higher voltage-less suitable for 3.3 V or 5 V logic protection but better for 24–32 V systems | Choose SMCJ33CA if system nominal voltage exceeds 30 V and tighter clamping margin is acceptable |
Compared with SMAJ30CA and SMCJ33CA, SM15T30CAHM3/H uniquely delivers 1500 W surge capability at 30 V standoff with AEC-Q101 qualification and halogen-free construction-making it optimal for automotive and high-reliability industrial designs where both energy handling and compliance are mandatory.
Availability
SM15T30CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SM15T30CAHM3/H 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, high-power, and automotive-grade solutions.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where 1500 W surge immunity and AEC-Q101 validation are required.
FAQ
What does the "CA" suffix indicate in SM15T30CAHM3/H?
The "CA" suffix in SM15T30CAHM3/H denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both forward and reverse directions. This eliminates polarity concerns during PCB layout and enables use on AC-coupled or floating signal paths. Unlike unidirectional variants (e.g., SM15T30AHM3/H), SM15T30CAHM3/H has no cathode marking band and exhibits identical VBR, VWM, and VC characteristics in either direction.
Is SM15T30CAHM3/H qualified for automotive applications?
Yes, SM15T30CAHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation revision 09-Jan-2024 (Document Number: 88380). It undergoes stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 requirements. The "HM3" designation also indicates halogen-free, RoHS-compliant construction suitable for automotive supply chains.
What is the maximum clamping voltage of SM15T30CAHM3/H under surge conditions?
The maximum clamping voltage (VC) of SM15T30CAHM3/H is 41.5 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 36 A. This value is measured per Figure 1 and Table on page 2 of the official Vishay datasheet (88380). At the shorter 8/20 μs waveform, VC rises to 53.5 V at 36 A, reflecting waveform-dependent clamping behavior critical for IEC 61000-4-5 compliance design.
How does the SMC (DO-214AB) package of SM15T30CAHM3/H affect thermal performance?
The SMC (DO-214AB) package of SM15T30CAHM3/H delivers RθJA = 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per JEDEC standards. Its RθJL = 15 °C/W enables effective heat transfer to PCB traces or thermal pads. This thermal profile supports continuous power dissipation up to 6.5 W at 50 °C ambient and ensures junction temperatures remain below 150 °C during repetitive surge events when layout guidelines are followed.
Can SM15T30CAHM3/H replace SM15T30AHM3/H in a design?
No-SM15T30CAHM3/H cannot directly replace SM15T30AHM3/H because they differ fundamentally in polarity: SM15T30CAHM3/H is bidirectional, while SM15T30AHM3/H is unidirectional with a marked cathode. Substituting them risks improper clamping on DC-biased lines or failure to suppress negative-going transients. Layout redesign and verification per IEC 61000-4-5 are required if changing polarity configuration, as SM15T30CAHM3/H has no polarity marking and symmetric IV characteristics.
SM15T30CAHM3/H 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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.5V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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)
SM15T30CAHM3/H FAQ
1.How can I place an order for SM15T30CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30CAHM3/H 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 SM15T30CAHM3/H reliable?
The price and inventory of SM15T30CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T30CAHM3/H is usually 5 days.
3.What payment methods are accepted for SM15T30CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30CAHM3/H?
SM15T30CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30CAHM3/H 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 SM15T30CAHM3/H?
For technical support, including SM15T30CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30CAHM3/H requirements.
6.How does Aetrix verify that SM15T30CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SM15T30CAHM3/H 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 SM15T30CAHM3/H meets industry standards.
7.What is the process for return or replacement of SM15T30CAHM3/H?
All SM15T30CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30CAHM3/H, 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 SM15T30CAHM3/H part is unused and in its original packaging.
Return procedure for SM15T30CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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