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Vishay General Semiconductor - Diodes Division SM15T150A-E3/9AT
- Part No.:
- SM15T150A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T150A-E3/9AT.pdf
- Description:
- TVS DIODE 128VWM 207VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,454
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Product details
Overview
SM15T150A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 207 V maximum clamping voltage at 7.2 A IPPM, and 128 V stand-off voltage. 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-E3/9AT datasheet, SM15T150A-E3/9AT pinout, SM15T150A-E3/9AT application, or SM15T150A-E3/9AT equivalent, key selection criteria include verified clamping performance at 7.2 A, unidirectional polarity with cathode band marking, RoHS-compliant commercial-grade construction, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped overvoltage protection device, triggered when reverse voltage exceeds 128 V (VWM) and fully clamping at ≤207 V under 7.2 A transient current. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 μA at VWM).
The device exhibits low thermal resistance (RθJL = 15 °C/W) and is rated for TJ up to +150 °C. It meets J-STD-020 MSL Level 1 and is designed for high-source-impedance circuits where peak current remains within its 7.2 A IPPM rating under standardized 10/1000 μs threat waveforms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 128 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 143 V / 158 V at 1 mA - Confirmed breakdown threshold range under DC test conditions |
| VC @ IPPM | 207 V at 7.2 A (10/1000 μs) - Clamping voltage limiting downstream component stress during surge |
| PPPM | 1500 W - Peak transient energy absorption capability under standard lightning waveform |
| IFSM | 200 A - Single half-sine surge current rating (10 ms), supporting inrush robustness |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| RθJL | 15 °C/W - Low junction-to-lead thermal resistance supporting power dissipation without external heatsink |
Pinout & Package
Package: SMC (DO-214AB), molded case meeting UL 94 V-0, matte tin-plated leads solderable per J-STD-002, polarity indicated by cathode band on unidirectional variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VREV > VBR |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping current path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 (4 kV) surges in high-impedance interfaces |
| Glass passivated chip junction | Ensures stable VBR over lifetime and improved humidity resistance vs. epoxy-passivated alternatives |
| Low inductance layout | Minimizes voltage overshoot during fast-rising transients (e.g., EFT bursts), preserving clamping accuracy |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow assembly without popcorn or delamination risk |
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 power rail and ground to clamp positive-going surges above 128 V. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤207 V, preventing latch-up or oxide damage. | Use Scenario: Safeguarding PLC analog input channels connected to 4–20 mA sensors exposed to relay-coil switching noise. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal line to ground, absorbing coupled inductive kickback before it reaches ADC front-end. Use Value: Maintains signal integrity by clamping transients within 100 ns while adding <1 pF capacitance to preserve bandwidth. |
| Telecom Power Supply Input | Consumer Appliance Mainboard Surge Protection |
Use Scenario: Secondary-side DC bus protection in PoE-powered switches subjected to Ethernet-coupled lightning surges. IC Role / Device Role / Timing Role: High-power unidirectional TVS on 48 V supply rail, coordinated with upstream MOVs and fuses. Use Value: Absorbs 1500 W transient energy without failure, failing short-circuit to trigger upstream overcurrent protection. | Use Scenario: Input stage protection for smart home hub power rails interfacing with AC mains-derived DC supplies. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 5 V/12 V internal distribution net, mounted near connector entry point. Use Value: Withstands repeated 10/1000 μs surges up to 7.2 A while maintaining <1 μA leakage at 128 V, minimizing standby power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ150A | Same SMC package, identical 128 V VWM and 207 V VC, but rated for 1500 W at 1.5x higher IPPM (10.9 A) | Higher surge current margin supports longer-duration transients; slightly higher RθJA (85 °C/W) | Select when system-level testing shows marginal margin at 7.2 A or when extended thermal derating is required |
| ON Semiconductor 1.5SMC150A | Identical electrical specs (VWM = 128 V, VC = 207 V @ 7.2 A), same SMC footprint, but not AEC-Q101 qualified | Approved for commercial/industrial use only; lacks automotive qualification documentation and traceability | Choose for cost-sensitive non-automotive designs where AEC-Q101 compliance is not mandated |
Compared with SMAJ150A and 1.5SMC150A, SM15T150A-E3/9AT provides identical clamping performance and RoHS-compliant commercial-grade construction, with the distinction of being part of a family offering AEC-Q101-qualified variants (HE3/HM3 suffixes) for automotive deployment continuity.
Availability
SM15T150A-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive I/O protection, and telecom power supply input requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SM15T150A-E3/9AT 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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SM15T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where robustness against lightning and inductive switching events is critical.
FAQ
What is the maximum clamping voltage of the SM15T150A-E3/9AT under standard surge conditions?
The SM15T150A-E3/9AT has a maximum clamping voltage (VC) of 207 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 7.2 A. This value is measured per Figure 1 and Table on page 2 of Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during transient events.
Is the SM15T150A-E3/9AT suitable for automotive applications?
The SM15T150A-E3/9AT itself is RoHS-compliant commercial grade (E3 suffix); however, the SM15T family includes AEC-Q101-qualified variants (e.g., SM15T150AHE3_A/I). For automotive use, specify the HE3 or HM3 suffix - the SM15T150A-E3/9AT is intended for industrial and telecom applications unless upgraded to qualified versions.
What does the "-E3/9AT" suffix indicate in SM15T150A-E3/9AT?
The "-E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "/9AT" specifies packaging in 13-inch diameter plastic tape and reel, with a base quantity of 3500 units. This format supports high-volume SMT assembly and complies with J-STD-002 solderability requirements.
How is polarity identified on the SM15T150A-E3/9AT?
The SM15T150A-E3/9AT is a unidirectional TVS diode with polarity marked by a cathode band on the SMC (DO-214AB) package body. The banded end is the cathode terminal and must be connected toward the protected line; the opposite end is the anode, typically routed to ground.
What thermal derating applies to the SM15T150A-E3/9AT above 25 °C ambient?
The SM15T150A-E3/9AT follows the derating curve in Figure 2 of document 88380: peak pulse power decreases linearly above TA = 25 °C, reaching ~50% of 1500 W at TJ = 125 °C. Continuous power dissipation (PD = 6.5 W) also derates per RθJA = 75 °C/W, requiring thermal design consideration for sustained surge duty cycles.
SM15T150A-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for SM15T150A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T150A-E3/9AT 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-E3/9AT reliable?
The price and inventory of SM15T150A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T150A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T150A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T150A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T150A-E3/9AT?
SM15T150A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T150A-E3/9AT 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-E3/9AT?
For technical support, including SM15T150A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T150A-E3/9AT requirements.
6.How does Aetrix verify that SM15T150A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T150A-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T150A-E3/9AT?
All SM15T150A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T150A-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for SM15T150A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T150A-E3/9AT Tags
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