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Vishay General Semiconductor - Diodes Division SMAJ150-E3/61
- Part No.:
- SMAJ150-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150-E3/61.pdf
- Description:
- TVS DIODE 150VWM 268VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,489
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Product details
Overview
SMAJ150-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on power and signal lines. It features a 150 V stand-off voltage (VWM), 167–204 V breakdown voltage (VBR) at 1 mA, 268 V maximum clamping voltage (VC) at 1.1 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting MOSFETs and ICs in industrial power supplies.
For engineers reviewing the SMAJ150-E3/61 datasheet, SMAJ150-E3/61 pinout, SMAJ150-E3/61 application, or SMAJ150-E3/61 equivalent, this device delivers verified surge immunity for 150 V DC bus lines, meets RoHS compliance and J-STD-020 MSL Level 1, and supports automated SMT placement with matte tin-plated leads solderable per J-STD-002.
Technical Context
This unidirectional TVS operates as a voltage-clamping protection device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable VBR tolerance (±10 %), low incremental surge resistance, and fast response time (<1 ps), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The device is rated for 40 A peak forward surge current (IFSM, 8.3 ms half-sine), operates across –55 °C to +150 °C junction temperature range, and exhibits 120 °C/W typical thermal resistance (junction-to-ambient) when mounted on 0.2 × 0.2″ copper pads - confirming suitability for high-reliability board-level protection without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC working margin for 150 V nominal rails. |
| VBR @ IT = 1 mA | 167–204 V - Breakdown voltage range confirms reliable avalanche initiation with ±10 % tolerance for robust design margining. |
| VC @ IPPM = 1.1 A | 268 V - Clamped voltage during 10/1000 µs surge; limits downstream stress to ≤268 V under full-rated transient energy. |
| PPPM | 400 W - Peak pulse power handling (10/1000 µs); enables protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 150 V lines. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports protection against accidental polarity reversal or high-energy inrush events. |
| Junction Temp Range | –55 °C to +150 °C - Enables deployment in automotive engine compartments and industrial motor drives without derating. |
| Package | DO-214AC (SMA) - Surface-mount outline with cathode band marking; compatible with standard 7″ tape-and-reel (E3/61) for automated assembly. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with two terminals, cathode marked by a band on one end. Matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 1A whisker resistance requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (non-marked end) | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration; carries surge current during clamping. |
| Cathode | Avalanche breakdown terminal (banded end) | Connected to protected line (e.g., 150 V rail); initiates clamping when reverse voltage exceeds VWM; polarity must be observed for correct operation. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime, minimizing parameter drift in harsh environments. |
| 400 W peak pulse power (10/1000 µs) | Provides validated surge immunity for IEC 61000-4-5 and ISO 7637-2 transient standards on 150 V systems. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection fidelity for sensitive gate drivers. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow compatibility up to 260 °C peak, eliminating bake-out requirements in manufacturing. |
| RoHS-compliant & halogen-free | Fulfills EU environmental directives and supports lead-free assembly without compromising electrical performance. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 150 V DC intermediate bus in programmable logic controller (PLC) power stages from relay coil flyback and load dump events. IC Role / Device Role: Unidirectional TVS placed between 150 V rail and chassis ground to clamp transients below MOSFET drain-source breakdown rating. Use Value: Limits VC to 268 V, ensuring <30 V margin below 300 V-rated power MOSFETs and preventing cumulative gate oxide damage. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins in BCM against battery load dump (ISO 7637-2 Pulse 5a) and jump-start surges. IC Role / Device Role: Standoff-rated TVS on 12 V–150 V auxiliary supply lines feeding MCU core logic and CAN/LIN interface ICs. Use Value: Withstands 40 A IFSM and operates to +150 °C, enabling direct integration into under-hood electronics without derating. |
| Telecom DC Feeder Line Protection | Renewable Energy Inverter DC Link |
Use Scenario: Shielding remote radio head (RRH) power input from induced lightning surges on outdoor telecom feeder cables. IC Role / Device Role: Primary clamping device on –48 V or +150 V DC feed lines, coordinated with upstream GDTs and series impedance. Use Value: 268 V clamping voltage ensures protected equipment remains within SELV limits while surviving 400 W transient energy bursts. |
Use Scenario: Protecting IGBT gate driver supplies and sensor feedback paths in solar string inverters exposed to grid-switching transients. IC Role / Device Role: Secondary protection on isolated 150 V auxiliary rails powering optocouplers and current sense amplifiers. Use Value: Glass-passivated junction maintains VBR stability across –40 °C to +85 °C ambient, critical for outdoor PV installations. |
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-E3/61 | Lower VBR range (167–185 V), tighter tolerance; clamps at 243 V @ 1.2 A - 25 V lower than SMAJ150-E3/61. | Better suited for systems requiring faster clamping onset and lower let-through voltage on 150 V rails with tight margin. | Select SMAJ150A-E3/61 when downstream components have <250 V absolute maximum ratings and tighter VBR control is required. |
| SMCJ150A-E3/73 | Same VWM/VBR specs but in larger DO-214AB (SMC) package; higher PPPM (1500 W) and IPPM (12.3 A). | Used where higher single-event energy absorption is needed, e.g., primary-level AC/DC front-end protection. | Choose SMCJ150A-E3/73 only if board space allows DO-214AB and system-level surge testing requires >400 W capability. |
Compared with SMAJ150-E3/61, the SMAJ150A-E3/61 offers lower clamping voltage and tighter VBR for margin-constrained designs, while the SMCJ150A-E3/73 provides higher surge capacity in a larger footprint - neither is pin-compatible, and both require layout review for mechanical fit and thermal management.
Availability
SMAJ150-E3/61 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom DC feeder lines, and renewable energy inverter DC link protection requiring stable component supply and RoHS-compliant SMT TVS diodes.
Supply support for SMAJ150-E3/61 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 reliability, efficiency, and manufacturability.
The SMAJ series is engineered for surface-mount transient suppression in high-volume industrial and automotive applications, balancing compact size, high surge capability, and process compatibility with automated assembly lines.
FAQ
What is the clamping voltage of SMAJ150-E3/61 under full-rated surge conditions?
The SMAJ150-E3/61 clamps to a maximum of 268 V when subjected to its rated 1.1 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per Fig. 1 and Fig. 3 in Vishay document 88390 and represents the upper limit of voltage let-through during worst-case transient events - critical for verifying margin against downstream component absolute maximum ratings in the SMAJ150-E3/61 application circuit.
Is SMAJ150-E3/61 unidirectional or bidirectional, and how is polarity identified?
SMAJ150-E3/61 is a unidirectional TVS diode. Polarity is indicated by a cathode band on the package - the banded end is the cathode and must be connected to the line being protected (e.g., 150 V rail), while the non-banded end (anode) connects to ground or return. This orientation ensures proper avalanche breakdown during reverse overvoltage events on the SMAJ150-E3/61 device.
Does SMAJ150-E3/61 meet automotive qualification standards?
No, SMAJ150-E3/61 is commercial-grade and RoHS-compliant but not AEC-Q101 qualified. For automotive applications, Vishay offers the SMAJ150HE3/61 variant (with HE3 suffix), which is explicitly qualified to AEC-Q101 and rated for high-reliability use in automotive electronics - the SMAJ150-E3/61 should not be used in safety-critical or under-hood automotive systems unless validated per customer-specific requirements.
What is the thermal resistance of SMAJ150-E3/61, and how does it affect PCB layout?
The SMAJ150-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2 × 0.2″ (5.0 × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Fig. 5 in document 88390; reducing pad area increases RθJA, potentially limiting surge duty cycle or requiring derating - proper copper pour design is essential for sustained reliability of the SMAJ150-E3/61 in repetitive surge environments.
Can SMAJ150-E3/61 be used in place of SMAJ150A-E3/61?
SMAJ150-E3/61 and SMAJ150A-E3/61 are not interchangeable without circuit review: the "A" suffix denotes tighter VBR tolerance (167–185 V vs. 167–204 V) and lower clamping voltage (243 V vs. 268 V). Substituting SMAJ150-E3/61 for SMAJ150A-E3/61 may result in delayed clamping onset and higher let-through voltage - verify VBR distribution and downstream voltage margins before using SMAJ150-E3/61 as a replacement.
SMAJ150-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 268V
- Current - Peak Pulse (10/1000µs):
- 1.1A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ150-E3/61 FAQ
1.How can I place an order for SMAJ150-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150-E3/61 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 SMAJ150-E3/61 reliable?
The price and inventory of SMAJ150-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ150-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ150-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150-E3/61?
SMAJ150-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150-E3/61 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 SMAJ150-E3/61?
For technical support, including SMAJ150-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150-E3/61 requirements.
6.How does Aetrix verify that SMAJ150-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ150-E3/61 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 SMAJ150-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ150-E3/61?
All SMAJ150-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150-E3/61, 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 SMAJ150-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ150-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ150-E3/61 Tags
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