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Vishay General Semiconductor - Diodes Division SMAJ150AHE3_A/H
- Part No.:
- SMAJ150AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150AHE3_A/H.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,157
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Product details
Overview
SMAJ150AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 150 V stand-off 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 - deployed on power rails and signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SMAJ150AHE3_A/H datasheet, SMAJ150AHE3_A/H pinout, SMAJ150AHE3_A/H application, or SMAJ150AHE3_A/H equivalent, key selection criteria include clamping performance under 1.2 A surge, AEC-Q101 qualification status, unidirectional polarity marking, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector: when reverse voltage exceeds VBR (167–185 V), it avalanches to clamp transients below VC = 243 V at IPPM = 1.2 A. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and low incremental surge resistance, enabling repeatable response to inductive switching spikes.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and carries AEC-Q101 qualification - confirming suitability for automotive under-hood applications where thermal cycling and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC bias margin for protected line. |
| VBR (min/max) | 167 V / 185 V at IT = 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on across temperature and lot variation. |
| VC @ IPPM | 243 V at 1.2 A - clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs or MOSFETs. |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform; supports single-event lightning or load-dump surges per ISO 7637-2. |
| ID @ VWM | ≤1.0 μA - ultra-low reverse leakage at rated stand-off; minimizes standby power loss in battery-powered systems. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in high-ambient environments like engine control modules. |
| RθJA | 120 °C/W - thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs derating requirements for sustained power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge events (IFSM = 40 A). |
| Cathode | Reverse-biased clamping terminal | Marked with band; connected to protected line (e.g., 12 V rail); avalanches into conduction when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock per JESD22 standards. |
| 400 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 5a (load dump) surges up to 60 V peak without degradation when mounted per recommended pad layout. |
| Glass passivated junction | Ensures stable VBR and low leakage over 15+ year field life; eliminates risk of moisture-induced parameter drift in humid environments. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking; supports high-yield automated assembly in volume production. |
| Unidirectional polarity | Enables precise protection of DC-biased lines (e.g., CAN bus power, sensor supply) while blocking forward conduction during normal operation. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V power inputs in engine control units (ECUs) against load dump transients per ISO 7637-2. IC Role / Device Role / Timing Role: Shunt clamping device placed between power rail and ground; responds within <1 ps to limit voltage excursion. Use Value: Clamps peak voltage to ≤243 V during 1.2 A surge, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) in industrial pressure sensors exposed to ESD and cable discharge. IC Role / Device Role / Timing Role: Bidirectional-capable protection element (though SMAJ150AHE3_A/H is unidirectional, used on supply side only) limiting reverse transients. Use Value: Maintains ≤1.0 μA leakage at 150 V, avoiding signal offset errors in precision current-loop circuits. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Securing -48 V DC input stages in telecom base station power modules against lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed cathode-to-rail to clamp positive transients on negative-ground systems. Use Value: Delivers 400 W pulse power handling with RθJA = 120 °C/W, enabling reliable operation without heatsinking in compact enclosures. |
Use Scenario: Shielding gate drivers and bootstrap circuits in BLDC motor inverters from inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Fast-response shunt suppressor across high-side FET source-to-drain or supply rail-to-ground. Use Value: Achieves 243 V clamping at 1.2 A, limiting voltage stress on 600 V-rated IGBTs and reducing snubber losses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150A-E3/61 | Same electrical specs and SMA package; RoHS-compliant commercial grade without AEC-Q101 qualification. | Lacks automotive qualification; suitable for industrial/commercial designs not requiring AEC validation. | Select when cost sensitivity outweighs automotive compliance requirements and lifecycle assurance is managed externally. |
| 1.5SMC150A | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher RθJA (90 °C/W) due to larger thermal mass. | Requires larger PCB footprint; better suited for higher average power dissipation scenarios with heatsinking. | Choose when board space allows and thermal management prioritizes junction-to-lead conduction over ambient convection. |
Compared with SMAJ150A-E3/61, SMAJ150AHE3_A/H adds AEC-Q101 qualification and traceable automotive-grade sourcing; versus 1.5SMC150A, it offers smaller footprint and tighter thermal coupling to PCB copper, favoring space-constrained automotive modules.
Availability
SMAJ150AHE3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power inputs, and consumer appliance motor drives requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMAJ150AHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against ESD, lightning, and inductive switching is mandatory.
FAQ
What is the clamping voltage of SMAJ150AHE3_A/H at its rated peak pulse current?
The SMAJ150AHE3_A/H has a maximum clamping voltage (VC) of 243 V at its specified peak pulse current (IPPM) of 1.2 A under a 10/1000 μs waveform. This value is measured per JEDEC test conditions and guarantees the upper voltage limit imposed on protected circuitry during surge events, directly supporting design margin calculations for downstream components such as microcontrollers or power MOSFETs.
Is SMAJ150AHE3_A/H qualified for automotive applications?
Yes, SMAJ150AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified variants. This qualification covers stress tests including temperature cycling, humidity, mechanical shock, and high-temperature operating life - making SMAJ150AHE3_A/H suitable for under-hood automotive modules like body control units and ADAS power supplies.
What is the thermal resistance of SMAJ150AHE3_A/H, and how does it affect PCB layout?
SMAJ150AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's datasheet; reducing pad size or omitting thermal vias increases RθJA, potentially exceeding TJ max. of +150 °C during repetitive surges - so layout must follow Vishay's DO-214AC mounting guidelines to maintain reliability.
How does the unidirectional configuration of SMAJ150AHE3_A/H impact its use in DC circuits?
The unidirectional configuration of SMAJ150AHE3_A/H means it conducts only in reverse bias above VBR, with cathode marked by a band. In DC circuits, this allows precise placement cathode-to-rail to clamp positive transients while blocking forward conduction - ideal for protecting regulated 150 V supply rails or isolated DC-DC converter outputs where polarity is fixed and reverse leakage must remain below 1.0 μA.
What packaging and reel options are available for SMAJ150AHE3_A/H?
SMAJ150AHE3_A/H is supplied in 7" diameter plastic tape and reel with a base quantity of 1800 units, using package code "H". This format supports high-speed pick-and-place assembly and is compatible with standard SMT equipment. The "_A/H" suffix explicitly denotes this reel configuration, distinguishing it from alternate packaging such as 13" reels (code "I") or bulk formats - ensuring correct logistics and line-side replenishment planning.
SMAJ150AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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_A/H FAQ
1.How can I place an order for SMAJ150AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150AHE3_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 SMAJ150AHE3_A/H reliable?
The price and inventory of SMAJ150AHE3_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 SMAJ150AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ150AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150AHE3_A/H?
SMAJ150AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150AHE3_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 SMAJ150AHE3_A/H?
For technical support, including SMAJ150AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150AHE3_A/H requirements.
6.How does Aetrix verify that SMAJ150AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ150AHE3_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 SMAJ150AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ150AHE3_A/H?
All SMAJ150AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150AHE3_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 SMAJ150AHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ150AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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