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Vishay General Semiconductor - Diodes Division SMAJ150AHE3/5A
- Part No.:
- SMAJ150AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150AHE3/5A.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,458
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Product details
Overview
SMAJ150AHE3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 150 V standoff voltage (VWM), 167–185 V breakdown voltage (VBR) at 1 mA, 243 V maximum clamping voltage (VC) at 1.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power rails.
For engineers reviewing the SMAJ150AHE3/5A datasheet, SMAJ150AHE3/5A pinout, SMAJ150AHE3/5A application, or SMAJ150AHE3/5A equivalent, this device serves as a RoHS-compliant, AEC-Q101 qualified transient protector for 150 V DC systems requiring fast response (<1 ps), low incremental surge resistance, and stable clamping under repetitive surge conditions up to 0.01% duty cycle.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown when reverse voltage exceeds VBR, limiting transient energy via low-clamp VC and high IPPM capability. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and robust surge handling up to 40 A IFSM (8.3 ms half-sine).
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The HE3 suffix confirms AEC-Q101 qualification and RoHS compliance, with matte tin-plated leads meeting J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous reverse operating voltage before clamping begins; sets system DC rail compatibility. |
| VBR (min/max) | 167 V / 185 V at 1 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM. |
| VC @ IPPM | 243 V at 1.2 A - Clamping voltage during 10/1000 μs surge; defines worst-case overvoltage seen by protected circuit. |
| PPPM | 400 W - Peak pulse power dissipation capability with 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 immunity. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against inrush or fault currents. |
| TJ Range | –55 °C to +150 °C - Full automotive-grade operating and storage temperature range per AEC-Q101. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 0.208" x 0.157" footprint; compatible with automated placement and reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads. Cathode indicated by band; anode is unmarked end. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements including HTOL, TC, and HAST. |
| 400 W peak pulse power | Supports IEC 61000-4-5 surge immunity testing up to 4 kV (line-to-ground) without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage stress on downstream components compared to higher-ratio suppressors. |
| Glass-passivated junction | Ensures stable leakage (<1.0 μA at VWM) and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns; no bake required prior to SMT placement. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump transients (up to 120 V) and alternator ripple on 12 V/24 V battery-fed ECUs and lighting modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges before they reach LDOs, microcontrollers, or CAN transceivers. Use Value: Limits peak voltage to ≤243 V during 10/1000 μs transients, preventing latch-up or gate oxide damage in 3.3 V/5 V logic downstream. |
Use Scenario: Protecting analog front-end inputs of pressure, temperature, or position sensors exposed to ESD and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point to shunt fast transients (<1 ns rise time) before signal conditioning amplifiers or ADC inputs. Use Value: Maintains signal integrity with <1.0 μA leakage at 150 V, enabling high-impedance sensor bias networks without offset drift. |
| DC Motor Drive Snubbing | Telecom Power Supply Input Protection |
|
Use Scenario: Absorbing back-EMF spikes generated during PWM commutation of brushed DC motors in HVAC actuators and seat controls. IC Role / Device Role / Timing Role: Placed across motor terminals or between H-bridge supply and ground to clamp inductive kickback pulses. Use Value: Withstands 40 A IFSM and 400 W PPPM, ensuring survival through repeated 100 kHz PWM switching cycles with minimal derating. |
Use Scenario: Guarding primary-side inputs of AC/DC adapters and PoE injectors against lightning-induced surges on telecom infrastructure equipment. IC Role / Device Role / Timing Role: First-line transient suppressor upstream of bridge rectifier and bulk capacitor to limit surge energy entering SMPS stage. Use Value: 243 V clamping at 1.2 A enables coordination with downstream MOVs or GDTs to achieve staged protection architecture compliant with ITU-T K.20. |
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-E3/5A | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and package. | Suitable for non-automotive industrial or consumer designs where automotive reliability certification is not required. | Select when cost sensitivity outweighs automotive qualification needs and full temperature range validation is not mandated. |
| SMCJ150AHE3/5A | Higher PPPM (1500 W), larger SMC (DO-214AB) package; same VWM/VBR/VC ratings. | Better suited for high-energy surge environments (e.g., outdoor telecom cabinets) where PCB space allows larger footprint. | Choose when system-level surge tests exceed 400 W requirements or when thermal margin must be increased beyond RθJA = 120 °C/W. |
Compared with SMAJ150AHE3/5A, the E3/5A variant lacks AEC-Q101 validation but matches all electrical parameters, while SMCJ150AHE3/5A trades compact size for higher surge capacity - making SMAJ150AHE3/5A optimal for space-constrained automotive modules needing certified reliability.
Availability
SMAJ150AHE3/5A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, DC motor controllers, and telecom power supplies requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SMAJ150AHE3/5A 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 application-specific optimization.
The SMAJ series targets surface-mount transient suppression in space-constrained, high-reliability applications - especially automotive and industrial systems where fast clamping, low leakage, and qualification rigor are mandatory.
FAQ
What is the clamping voltage of SMAJ150AHE3/5A at its rated peak pulse current?
The SMAJ150AHE3/5A has a maximum clamping voltage (VC) of 243 V at 1.2 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per standard test methods in the Vishay datasheet (Doc. #88390, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuits during surge events. The SMAJ150AHE3/5A maintains this clamping performance across its full operating temperature range.
Is SMAJ150AHE3/5A suitable for automotive applications?
Yes, SMAJ150AHE3/5A is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It meets stress test requirements including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. The SMAJ150AHE3/5A is deployed in engine control units, body electronics, and ADAS power domains where transient immunity and long-term reliability are critical.
What is the standoff voltage rating of SMAJ150AHE3/5A, and how does it relate to system design?
The SMAJ150AHE3/5A has a reverse standoff voltage (VWM) of 150 V, meaning it remains non-conductive below this DC or RMS voltage level. This rating allows direct integration into 125–150 V DC systems such as 24 V truck electronics or 48 V mild-hybrid architectures. Designers must ensure normal operating voltage stays ≥10–15% below VWM to avoid leakage-related power loss - a constraint fully satisfied by the SMAJ150AHE3/5A's <1.0 μA leakage at 150 V.
Does SMAJ150AHE3/5A have a bidirectional version, and how does it differ?
No - SMAJ150AHE3/5A is unidirectional only, indicated by the "A" suffix. Its bidirectional counterpart is SMAJ150CAHE3/5A (not SMAJ150AHE3/5A), which provides symmetrical clamping in both polarities and is used in AC-coupled or floating signal lines. The SMAJ150AHE3/5A features a cathode band for polarity identification and is intended for DC rail protection where ground-referenced suppression is required.
What package type does SMAJ150AHE3/5A use, and what are its mounting requirements?
SMAJ150AHE3/5A uses the SMA (DO-214AC) surface-mount package, measuring 4.93 mm × 3.99 mm with 2.54 mm lead pitch. It requires minimum 5.0 mm × 5.0 mm copper pads per terminal for rated 400 W pulse power dissipation, per Vishay's recommended layout in Doc. #88390. The SMAJ150AHE3/5A is compatible with standard reflow profiles up to 260 °C peak (MSL Level 1) and supports automated pick-and-place assembly.
SMAJ150AHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 243V
- Current - Peak Pulse (10/1000µs):
- 1.2A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ150AHE3/5A FAQ
1.How can I place an order for SMAJ150AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150AHE3/5A 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 SMAJ150AHE3/5A reliable?
The price and inventory of SMAJ150AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ150AHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ150AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150AHE3/5A?
SMAJ150AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150AHE3/5A 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 SMAJ150AHE3/5A?
For technical support, including SMAJ150AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150AHE3/5A requirements.
6.How does Aetrix verify that SMAJ150AHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ150AHE3/5A 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 SMAJ150AHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ150AHE3/5A?
All SMAJ150AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150AHE3/5A, 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 SMAJ150AHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ150AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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