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Vishay General Semiconductor - Diodes Division SM15T150A-M3/9AT
- Part No.:
- SM15T150A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T150A-M3/9AT.pdf
- Description:
- TVS DIODE 128VWM 207VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SM15T150A-M3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 128 V stand-off voltage (VWM), 143–158 V breakdown voltage (VBR), and clamps to 207 V at 7.2 A peak pulse current (IPPM). It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients in automotive and industrial power electronics.
For engineers reviewing the SM15T150A-M3/9AT datasheet, SM15T150A-M3/9AT pinout, SM15T150A-M3/9AT application, or SM15T150A-M3/9AT equivalent, key selection criteria include clamping voltage at rated IPPM, VWM/VBR margin for system operating voltage, thermal resistance (RθJA = 75 °C/W), halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification path via HM3 variant.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging a glass-passivated silicon junction to achieve low dynamic impedance and fast response (<1 ns) to transient overvoltages. Its 1500 W surge rating is validated under standardized 10/1000 μs waveform conditions with derating above TA = 25 °C per Fig. 2.
Thermal performance relies on PCB copper pad layout (0.31" × 0.31", 8.0 mm × 8.0 mm per terminal) to sustain 6.5 W steady-state power dissipation at TA = 50 °C. Failure mode under overstress is short-circuit, consistent with IEC 61000-4-5 Level 4 surge immunity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 128 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets upper limit for DC bus or signal line voltage compatibility. |
| VBR (min/max) | 143 V / 158 V at 1.0 mA - Confirmed breakdown threshold range; ensures reliable turn-on above system nominal voltage with margin. |
| VC @ IPPM | 207 V at 7.2 A (10/1000 μs) - Clamping voltage during worst-case surge; determines maximum stress imposed on protected downstream components. |
| PPPM | 1500 W - Peak pulse power handling capability; qualifies for IEC 61000-4-5 2 Ω/12 Ω coupling network surge testing. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; requires ≥8 mm × 8 mm copper pads per lead to maintain TJ ≤ 150 °C under sustained surges. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
SMC (DO-214AB) package with two terminals: anode and cathode. Cathode identified by molded band on body. No internal circuitry-device functions as single-junction PN diode with asymmetric conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected circuit's high-side rail or signal line; conducts surge current to ground when VAK > VBR. |
| Anode | Reference/ground return | Typically tied to system ground plane; completes low-inductance surge current path during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validated surge rating enables protection against lightning-induced transients per IEC 61000-4-5, Level 4 (4 kV/2 Ω). |
| Glass-passivated chip junction | Ensures stable VBR and low leakage (<1 μA at VWM) across temperature and lifetime; improves humidity robustness. |
| Low inductance design | Minimizes voltage overshoot during fast-rising transients (<1 ns response); critical for protecting high-speed digital interfaces. |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills IPC-1752A material declaration requirements and EU Directive 2015/863 without compromising surge performance. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and standard reflow profile (peak 260 °C); eliminates baking requirement prior to assembly. |
Applications
| Automotive Power Distribution | Industrial Motor Drive I/O Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs and body control modules from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input to clamp spikes up to ±100 V. Use Value: Withstands 1500 W surges while maintaining VC = 207 V, limiting stress on downstream regulators below their absolute maximum rating. |
Use Scenario: Shielding PLC analog input channels from inductive kickback generated by solenoid valves and contactors. IC Role / Device Role / Timing Role: Mounted directly at connector entry point to shunt transients before entering signal conditioning circuitry. Use Value: Low clamping voltage (207 V) and fast response prevent latch-up in precision op-amps and ADC front-ends operating at ±10 V full scale. |
| Telecom DC Power Feeds | Consumer Appliance Control Boards |
|
Use Scenario: Safeguarding PoE-powered Ethernet switches and base station RF modules connected to outdoor power feeds. IC Role / Device Role / Timing Role: Primary surge suppression stage on -48 V DC input, coordinated with upstream GDT and downstream ceramic capacitors. Use Value: 128 V VWM provides 20 % margin above nominal -48 V rail, enabling reliable hold-off during brownouts and line fluctuations. |
Use Scenario: Securing microcontroller GPIOs and relay drivers in washing machines and HVAC controllers exposed to motor commutation noise. IC Role / Device Role / Timing Role: Localized TVS on each high-side switch output to absorb flyback energy from brushed DC motors. Use Value: SMC package allows placement within 2 mm of connector or relay coil, minimizing loop inductance and improving clamping efficacy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150A | Same VWM (128 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 testing | Select SMAJ150A only for space-constrained consumer designs where surge threat is limited to ESD and local switching noise. |
| SMCJ150A | Identical electrical specs (VWM, VBR, VC, PPPM), same SMC package, but E3 (non-halogen-free) RoHS version | No material compliance difference in function; identical thermal and surge performance | Choose SMCJ150A-E3/9AT if halogen-free content is not required by OEM specification or regional regulation. |
Compared with SMAJ150A, SM15T150A-M3/9AT delivers 275 % higher surge power handling and lower thermal resistance, enabling robust protection in harsh environments; versus SMCJ150A, it adds halogen-free compliance without sacrificing electrical or mechanical performance.
Availability
SM15T150A-M3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive I/O protection, and telecom DC power feed applications requiring stable component supply, long-term lifecycle support, and halogen-free material compliance.
Supply support for SM15T150A-M3/9AT 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, and protection devices with emphasis on reliability, surge robustness, and automotive-grade qualification.
The SM15T Series is designed specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure, targeting applications demanding 1500 W surge capability in compact surface-mount packages.
FAQ
What is the maximum clamping voltage of SM15T150A-M3/9AT at its rated peak pulse current?
The SM15T150A-M3/9AT clamps to 207 V at 7.2 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal and represents the maximum voltage seen by protected circuitry during a worst-case surge event. The SM15T150A-M3/9AT maintains this clamping performance across its specified operating temperature range.
Is SM15T150A-M3/9AT qualified to AEC-Q101?
The SM15T150A-M3/9AT is halogen-free and RoHS-compliant but is not AEC-Q101 qualified. For automotive applications requiring AEC-Q101, the HM3-suffixed variant (e.g., SM15T150AHM3/9AT) must be selected. The SM15T150A-M3/9AT shares identical electrical and thermal specifications with its HM3 counterpart except for qualification status and material certification documentation.
What does the "M3" suffix indicate in SM15T150A-M3/9AT?
The "M3" suffix in SM15T150A-M3/9AT denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-201 Class 2 whisker resistance requirements. It confirms compliance with IPC-1752A material declarations and EU Directive 2015/863, distinguishing it from the E3 (RoHS-compliant but not halogen-free) variant. The SM15T150A-M3/9AT retains full electrical equivalence with E3 versions.
Can SM15T150A-M3/9AT be used in bidirectional transient protection circuits?
No - SM15T150A-M3/9AT is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional protection, the CA-suffixed variant SM15T150CA-M3/9AT must be used. Using the unidirectional SM15T150A-M3/9AT in AC or bipolar signal paths risks forward conduction and failure; its electrical characteristics apply only in reverse-biased configuration.
What is the thermal resistance junction-to-ambient for SM15T150A-M3/9AT?
The SM15T150A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes natural convection cooling and defines the temperature rise per watt of steady-state power dissipation. Exceeding 6.5 W at TA = 50 °C risks exceeding the 150 °C maximum junction temperature.
SM15T150A-M3/9AT 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):
- 128V
- Voltage - Breakdown (Min):
- 143V
- Voltage - Clamping (Max) @ Ipp:
- 207V
- Current - Peak Pulse (10/1000µs):
- 7.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T150A-M3/9AT FAQ
1.How can I place an order for SM15T150A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T150A-M3/9AT 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 SM15T150A-M3/9AT reliable?
The price and inventory of SM15T150A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T150A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T150A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T150A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T150A-M3/9AT?
SM15T150A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T150A-M3/9AT 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 SM15T150A-M3/9AT?
For technical support, including SM15T150A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T150A-M3/9AT requirements.
6.How does Aetrix verify that SM15T150A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T150A-M3/9AT 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 SM15T150A-M3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T150A-M3/9AT?
All SM15T150A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T150A-M3/9AT, 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 SM15T150A-M3/9AT part is unused and in its original packaging.
Return procedure for SM15T150A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T150A-M3/9AT Tags
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