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Vishay General Semiconductor - Diodes Division SM15T30CAHM3_A/H
- Part No.:
- SM15T30CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30CAHM3_A/H.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,399
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Product details
Overview
SM15T30CAHM3_A/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), 33.2 V clamping voltage at 36 A peak pulse current, and AEC-Q101 qualified for automotive applications. It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T30CAHM3_A/H datasheet, SM15T30CAHM3_A/H pinout, SM15T30CAHM3_A/H application, or SM15T30CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, 30 V VWM, 33.2 V VC at IPPM, AEC-Q101 qualification, and SMC package compatibility with automated placement and high-temperature reflow.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) specified at 31.4–34.7 V (min/max) under 1 mA test current. Its low clamping ratio (VC/VBR ≈ 1.06) ensures tight overvoltage protection during fast transients.
Designed for high-energy threat suppression, it sustains 1500 W peak pulse power per 10/1000 μs waveform and handles up to 36 A peak pulse current when mounted on 8.0 mm × 8.0 mm copper pads. Thermal resistance is 75 °C/W junction-to-ambient and 15 °C/W junction-to-lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 31.4 V / 34.7 V - Breakdown occurs within this range at 1 mA, defining reliable turn-on threshold |
| VC @ IPPM | 33.2 V @ 36 A - Clamped voltage during 1500 W transient, limiting stress on downstream components |
| PPPM | 1500 W - Peak pulse power handling per standard 10/1000 μs waveform, suitable for lightning-level threats |
| TJ max. | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Surface-mount package with 7.75 mm × 6.22 mm footprint and 2.62 mm height, optimized for thermal dissipation |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
Pinout & Package
SM15T30CAHM3_A/H is a two-terminal bidirectional TVS diode in SMC (DO-214AB) package. No polarity marking is present on bidirectional variants; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Either terminal conducts during overvoltage events in either polarity - no directional bias required |
| Case (cathode band absent) | Thermal and mechanical interface | Exposed metal slug provides low-thermal-resistance path to PCB copper; no electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 1500 W peak pulse rating | Withstands lightning-induced surges (IEC 61000-4-5 Level 4) and industrial motor switching transients |
| Low clamping voltage (33.2 V) | Minimizes voltage overshoot across protected ICs or MOSFETs during 36 A transient events |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring long-term field reliability |
| Halogen-free, RoHS-compliant | Meets automotive and industrial environmental compliance requirements without compromising surge performance |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs and junction boxes from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed at input stage to clamp ±33.2 V spikes before they reach DC-DC converters or microcontrollers. Use Value: Prevents latch-up or gate oxide damage in automotive MCUs by limiting transient voltage to safe margin below absolute maximum ratings. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors from EMI and relay-coil kickback. IC Role / Device Role / Timing Role: Fast-response voltage clamp on signal line between sensor ASIC and PLC input module. Use Value: Maintains signal integrity during 36 A transients while adding <100 ps delay - no impact on loop response time. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Control |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors against induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on RJ45 port side, coordinated with secondary GDT or polymer PTC. Use Value: Absorbs 1500 W energy without degradation, preserving signal eye diagram integrity per IEEE 802.3af/bt standards. | Use Scenario: Suppressing back-EMF from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Across-motor terminals to quench inductive kick during MOSFET commutation. Use Value: Eliminates need for freewheeling diodes in half-bridge drivers, reducing BOM count and board space. |
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 (vs. 1500 W); SMA package (smaller thermal mass); VC = 48.4 V @ 12.3 A | Limited to lower-energy threats (IEC 61000-4-2 contact discharge only); not AEC-Q101 qualified | Select when cost or board space is critical and surge threat level is ≤600 W |
| SMCJ30CA | Identical SMC package and 1500 W rating; VBR = 33.3–36.8 V; VC = 48.4 V @ 31 A; AEC-Q101 available in HM3 variant | Higher clamping voltage increases protected device stress; same footprint but different VBR/VC trade-off | Choose if higher VBR margin is needed to avoid false triggering near 30 V rail |
Compared with SMAJ30CA and SMCJ30CA, SM15T30CAHM3_A/H delivers tighter clamping (33.2 V vs. ≥48.4 V) at full 1500 W rating and guarantees AEC-Q101 compliance - critical for automotive front-end protection where voltage margin and reliability are non-negotiable.
Availability
SM15T30CAHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with guaranteed AEC-Q101 qualification and halogen-free compliance.
Supply support for SM15T30CAHM3_A/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, TVS devices, and optoelectronics with emphasis on high-reliability and automotive-grade solutions.
The SM15T Series is designed specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W surge immunity and AEC-Q101 validation are mandatory.
FAQ
What does the "CA" suffix indicate in SM15T30CAHM3_A/H?
The "CA" suffix denotes a bidirectional configuration - meaning SM15T30CAHM3_A/H clamps voltage transients equally in both polarities, unlike unidirectional "A" variants that conduct only in reverse bias. This makes SM15T30CAHM3_A/H ideal for protecting AC-coupled or floating signal paths without polarity concerns.
Is SM15T30CAHM3_A/H suitable for automotive under-hood applications?
Yes - SM15T30CAHM3_A/H is AEC-Q101 qualified and rated for TJ max. = +150 °C, making it suitable for under-hood environments such as engine control units, battery management systems, and lighting modules where ambient temperatures exceed 125 °C.
How does the clamping voltage of SM15T30CAHM3_A/H compare to similar 30 V TVS diodes?
SM15T30CAHM3_A/H achieves a clamping voltage of 33.2 V at 36 A, significantly lower than alternatives like SMCJ30CA (48.4 V at 31 A). This 15.2 V advantage reduces stress on protected ICs and enables safer operation near 30 V rails without derating.
What is the meaning of "HM3_A/H" in the full part number SM15T30CAHM3_A/H?
"HM3" indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified construction; "A/H" specifies packaging in 7″ tape-and-reel (H = reel size code) with revision A. The full designation confirms SM15T30CAHM3_A/H meets automotive environmental and reliability standards in a standardized surface-mount format.
Can SM15T30CAHM3_A/H replace SM15T30A in an existing design?
No - SM15T30CAHM3_A/H is bidirectional while SM15T30A is unidirectional. Substituting them requires verifying circuit polarity and transient directionality. Unidirectional SM15T30A has a cathode band marking; SM15T30CAHM3_A/H has no marking and conducts symmetrically - incorrect replacement may cause unintended conduction or failed protection.
SM15T30CAHM3_A/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:
- Active
- 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_A/H FAQ
1.How can I place an order for SM15T30CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30CAHM3_A/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_A/H reliable?
The price and inventory of SM15T30CAHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for SM15T30CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30CAHM3_A/H?
SM15T30CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30CAHM3_A/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_A/H?
For technical support, including SM15T30CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30CAHM3_A/H requirements.
6.How does Aetrix verify that SM15T30CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T30CAHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of SM15T30CAHM3_A/H?
All SM15T30CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30CAHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for SM15T30CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30CAHM3_A/H Tags
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