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Vishay General Semiconductor - Diodes Division SMAJ150AHM3/H
- Part No.:
- SMAJ150AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150AHM3/H.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,872
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Product details
Overview
SMAJ150AHM3/H 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 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 - suitable for protecting MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMAJ150AHM3/H datasheet, SMAJ150AHM3/H pinout, SMAJ150AHM3/H application, or SMAJ150AHM3/H equivalent, this device delivers verified AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and MSL Level 1 moisture sensitivity - critical for automotive-grade ESD/surge protection design-in and long-term BOM stability.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its VBR threshold (167–185 V), limiting transient energy via low incremental surge resistance and fast sub-nanosecond response. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and robust thermal performance up to +150 °C junction temperature.
The SMAJ150AHM3/H uses a single-diode topology with cathode-band polarity marking, optimized for automated placement on PCBs with 0.2" × 0.2" copper pads per terminal. Its 120 °C/W junction-to-ambient thermal resistance and 30 °C/W junction-to-lead resistance support reliable operation under repetitive surge conditions at ≤0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (min/max) | 167 V / 185 V at 1 mA - Confirmed breakdown range ensuring consistent turn-on across production lots. |
| VC @ IPPM | 243 V at 1.2 A - Clamped voltage during 10/1000 μs surge; determines protected circuit's maximum stress level. |
| PPPM | 400 W - Peak pulse power handling capability; enables suppression of high-energy transients like ISO 7637-2 Pulse 1/2a. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports inrush tolerance in power rail applications. |
| TJ max. | +150 °C - Maximum junction temperature; allows deployment in under-hood automotive or high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with JEDEC J-STD-020 reflow profiles. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, compliant with UL 94 V-0 flammability rating and JESD 22-B102 solderability standards. Polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-side reference; completes clamping loop during overvoltage events. |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., 150 V rail); conducts avalanche current when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD; supports PPAP documentation. |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-609A Class 1; eliminates brominated flame retardants without compromising UL 94 V-0 rating. |
| 400 W peak pulse power (10/1000 μs) | Handles high-energy transients such as load dump (ISO 16750-2) and inductive switching spikes in 12 V/24 V systems. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during clamping; preserves margin for downstream 150 V-rated components. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without preconditioning; reduces manufacturing complexity and cost. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppresses load-dump transients (up to 120 V, 400 ms) on 150 V auxiliary power rails in engine control units and ADAS domain controllers. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between 150 V supply and chassis ground; activates within <1 ns to limit voltage excursion. Use Value: Prevents latch-up or gate oxide damage in high-side drivers and PMICs rated for 150 V absolute maximum, maintaining system uptime per ISO 16750-2. |
Use Scenario: Shields analog front-end inputs of pressure/temperature sensors in factory automation PLCs exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across differential sensor pair (e.g., 4–20 mA loop) and local ground. Use Value: Limits common-mode surges to <243 V while maintaining <1.0 μA leakage at 150 V, preserving measurement accuracy and ADC input integrity. |
| Telecom DC Power Feeding | Renewable Energy Inverter Control |
|
Use Scenario: Protects PoE++ (IEEE 802.3bt Type 4) midspan injectors and powered devices operating at up to 150 V DC over twisted-pair cabling. IC Role / Device Role / Timing Role: Unidirectional TVS mounted on primary-side DC bus to absorb lightning-induced surges coupled via Ethernet magnetics. Use Value: Withstands 400 W pulses without degradation, meeting IEC 61000-4-5 Level 4 (4 kV line-earth) immunity requirements for telecom infrastructure. |
Use Scenario: Safeguards gate driver ICs and isolated feedback optocouplers in solar string inverters subjected to grid-switching transients and PV array arcing events. IC Role / Device Role / Timing Role: Clamping device on isolated 150 V auxiliary supply rail feeding PWM controller and isolation barrier. Use Value: Ensures uninterrupted gate drive timing by limiting clamped voltage to 243 V - below the 250 V isolation rating of reinforced optocouplers used in IGBT/MOSFET drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150AHE3/H | Same electrical specs but RoHS-compliant commercial grade (E3), not halogen-free or AEC-Q101 qualified. | Lacks automotive qualification and halogen-free certification; suitable for non-automotive industrial use only. | Select SMAJ150AHE3/H where AEC-Q101 and halogen-free requirements are not mandated. |
| SMAJ150A-M3/61 | Identical electrical and mechanical specs; differs only in packaging (61 = 7" reel, 1800 pcs) and base P/N suffix format. | No functional difference; same HM3 material composition and qualification status. | SMAJ150A-M3/61 is a packaging variant - choose based on volume procurement and tape-and-reel logistics. |
Compared with SMAJ150AHM3/H, SMAJ150AHE3/H omits AEC-Q101 validation and halogen-free compliance, reducing suitability for automotive Tier-1 designs; SMAJ150A-M3/61 offers identical performance but alternate reel coding - no change in layout, reliability, or qualification.
Availability
SMAJ150AHM3/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom DC feeding, renewable energy inverter control, and high-voltage IoT gateway designs requiring stable component supply and long-term lifecycle assurance.
Supply support for SMAJ150AHM3/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, TVS devices, and MOSFETs with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMAJ series was developed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, low clamping ratio, and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMAJ150AHM3/H at its rated peak pulse current?
The SMAJ150AHM3/H has a maximum clamping voltage (VC) of 243 V at 1.2 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The clamping occurs rapidly (<1 ns), ensuring sensitive downstream components like 150 V-rated MOSFETs remain within safe operating limits. This specification is confirmed in the Vishay datasheet document 88390, revision 09-Jan-2024.
Is SMAJ150AHM3/H qualified for automotive applications?
Yes, SMAJ150AHM3/H is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (note "(1) AEC-Q101 qualified" on page 3). The "HM3" suffix denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction - validated for temperature cycling, highly accelerated life testing, and ESD robustness required in automotive ECUs and ADAS modules. This makes SMAJ150AHM3/H suitable for PPAP submission and production deployment in passenger vehicle and commercial vehicle systems.
What does the "HM3" suffix mean in SMAJ150AHM3/H?
The "HM3" suffix in SMAJ150AHM3/H indicates halogen-free, RoHS-compliant, and AEC-Q101-qualified construction per Vishay's ordering nomenclature. Specifically, "H" denotes the halogen-free molding compound, "M3" confirms RoHS compliance and JESD 201 Class 2 whisker resistance, and the full suffix signals full automotive qualification. This distinguishes it from E3 (RoHS only) or HE3 (RoHS + AEC-Q101, but not halogen-free) variants. All HM3 devices meet UL 94 V-0 and MSL Level 1 reflow requirements.
Can SMAJ150AHM3/H be used in bidirectional configurations?
No, SMAJ150AHM3/H is a unidirectional TVS diode, as indicated by the "A" (not "CA") in its part number and the presence of a cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., SMAJ150CA), which contains two opposing avalanche junctions. Using SMAJ150AHM3/H in reverse-biased AC or floating applications would result in forward conduction and failure. For bidirectional protection at 150 V standoff, specify SMAJ150CA-HM3 or equivalent.
What is the maximum operating temperature for SMAJ150AHM3/H?
The SMAJ150AHM3/H has a specified operating junction and storage temperature range of –55 °C to +150 °C, per the Absolute Maximum Ratings table in Vishay document 88390. Its thermal resistance values - RθJA = 120 °C/W and RθJL = 30 °C/W - enable reliable operation at full power derating up to +125 °C ambient when mounted on recommended 0.2" × 0.2" copper pads. This makes SMAJ150AHM3/H suitable for under-hood automotive and high-temperature industrial environments where sustained +105 °C ambient is typical.
SMAJ150AHM3/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:
- 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:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ150AHM3/H FAQ
1.How can I place an order for SMAJ150AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150AHM3/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 SMAJ150AHM3/H reliable?
The price and inventory of SMAJ150AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ150AHM3/H is usually 5 days.
3.What payment methods are accepted for SMAJ150AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150AHM3/H?
SMAJ150AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150AHM3/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 SMAJ150AHM3/H?
For technical support, including SMAJ150AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150AHM3/H requirements.
6.How does Aetrix verify that SMAJ150AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMAJ150AHM3/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 SMAJ150AHM3/H meets industry standards.
7.What is the process for return or replacement of SMAJ150AHM3/H?
All SMAJ150AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150AHM3/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 SMAJ150AHM3/H part is unused and in its original packaging.
Return procedure for SMAJ150AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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