My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ150AHM3/I
- Part No.:
- SMAJ150AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150AHM3/I.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,248
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ150AHM3/I 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 - ideal for safeguarding MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in industrial and automotive systems.
For engineers reviewing the SMAJ150AHM3/I datasheet, SMAJ150AHM3/I pinout, SMAJ150AHM3/I application, or SMAJ150AHM3/I equivalent, this device delivers verified AEC-Q101 qualification, halogen-free RoHS compliance (HM3 suffix), low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level surge protection design and automotive-grade production deployment.
Technical Context
This unidirectional TVS diode operates as a fast-acting shunt clamp, entering avalanche conduction when reverse voltage exceeds VBR, limiting transient energy to protected circuitry. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and repeatable clamping performance across temperature (–55 °C to +150 °C).
Rated for 400 W peak pulse power (derated to 300 W above 78 V), it sustains repetitive surges at 0.01% duty cycle when mounted on 5.0 mm × 5.0 mm copper pads. Thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), supporting reliable operation under sustained transient stress without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 150 V rail protection. |
| VBR (min/max) | 167 V / 185 V at 1 mA - Confirmed breakdown range ensures predictable turn-on threshold with <12% tolerance. |
| VC @ IPPM | 243 V at 1.2 A - Clamping voltage during full-rated 10/1000 μs surge; limits downstream voltage stress to ≤243 V. |
| PPPM | 400 W - Peak pulse power handling capability with standard 10/1000 μs waveform; supports IEC 61000-4-5 Level 3/4 surge immunity. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against accidental polarity reversal events. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount, low-profile package with matte tin-plated leads; compatible with J-STD-002 soldering and automated placement. |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0 flammability rating; cathode indicated by band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to system ground or lower-potential node; forms current path during clamping. |
| Cathode | Reverse voltage sensing / clamping node | Connected to protected line (e.g., 150 V supply or signal trace); avalanche conduction initiates here during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance mandates for global OEMs without compromising surge robustness or thermal performance. |
| 400 W peak pulse power (10/1000 μs) | Provides industry-standard surge immunity for IEC 61000-4-5 and ISO 7637-2 test levels without external heat sinking. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during transients - critical for protecting 150 V-rated MOSFETs and gate drivers. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture-induced popcorn failure or delamination. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Guarding |
|---|---|
|
Use Scenario: Protecting 150 V battery-fed ECUs and DC-DC converter outputs from load dump and alternator surge events per ISO 7637-2 Pulse 5a. IC Role / Device Role: Unidirectional shunt TVS placed between 150 V rail and chassis ground to clamp transients exceeding 167 V. Use Value: Limits peak voltage to ≤243 V during 100 V/100 ms load dump, preventing damage to downstream 200 V-rated MOSFETs and controllers. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role: Bidirectional-capable unidirectional TVS (cathode tied to signal, anode to ground) suppressing ±1 kV EFT bursts per IEC 61000-4-4. Use Value: Maintains signal integrity below 150 V standoff while clamping sub-100 ns transients with <1 ns response time and <1.0 μA leakage at 150 V. |
| Telecom DC Power Input Stage | Motor Drive Gate Driver Protection |
|
Use Scenario: Safeguarding -48 V telecom rectifier outputs against lightning-induced surges on outdoor cabinet feeds. IC Role / Device Role: Unidirectional TVS installed between -48 V bus and ground, leveraging 150 V VWM headroom for negative-rail compatibility. Use Value: Withstands 400 W pulses without degradation, ensuring >100,000 surge cycles in field-deployed base station power supplies. |
Use Scenario: Protecting high-side gate driver ICs in 150 V BLDC motor inverters from shoot-through-induced voltage spikes. IC Role / Device Role: Clamp placed across gate-source terminals of 200 V Si MOSFETs to suppress dv/dt-induced false turn-on. Use Value: 243 V clamping voltage prevents gate oxide breakdown while enabling fast recovery (<1 ns) to maintain PWM fidelity. |
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/I | Same electrical specs but RoHS-compliant (E3), non-halogen-free; lacks AEC-Q101 qualification. | Approved for commercial/industrial use only; not certified for automotive under-hood deployment. | Select when halogen-free requirement is waived and automotive qualification is unnecessary. |
| SMBJ150A-HM3 | Higher 600 W PPPM rating, SMB (DO-214AA) package - 2.5× larger footprint, 30% higher clamping voltage (265 V). | Better suited for higher-energy surges; requires PCB layout change due to larger pad dimensions and different thermal mass. | Choose when system-level surge testing exceeds 400 W or when enhanced thermal margin is required in high-power drives. |
Compared with SMAJ150AHM3/I, SMAJ150AHE3/I offers identical protection performance without halogen-free assurance or automotive qualification, while SMBJ150A-HM3 trades compact size for higher surge capacity and relaxed clamping - making SMAJ150AHM3/I optimal for space-constrained, AEC-Q101–mandated 150 V rail protection.
Availability
SMAJ150AHM3/I is available at Aetrix Electronics and suitable for automotive ECU power rails, industrial sensor interfaces, telecom DC inputs, and motor drive gate protection requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ150AHM3/I 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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The SMAJ series targets board-level transient protection in harsh environments, with design focus on fast response, stable clamping, and qualification to AEC-Q101 and IEC/ISO surge standards.
FAQ
What is the clamping voltage of the SMAJ150AHM3/I under full-rated surge conditions?
The SMAJ150AHM3/I exhibits a maximum clamping voltage (VC) of 243 V when subjected to its rated 1.2 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that protected circuitry sees no more than 243 V during worst-case transient events - critical for ensuring compatibility with 200 V-rated power devices downstream of the SMAJ150AHM3/I.
Is the SMAJ150AHM3/I qualified for automotive applications?
Yes, the SMAJ150AHM3/I carries AEC-Q101 qualification, confirmed in Vishay's official documentation (Document Number 88390, Revision 09-Jan-2024). The "HM3" suffix denotes halogen-free, RoHS-compliant construction with full automotive stress testing - including temperature cycling, humidity bias HAST, and mechanical shock - making SMAJ150AHM3/I suitable for under-hood and ADAS-related deployments where reliability is non-negotiable.
How does the SMAJ150AHM3/I differ from bidirectional variants like SMAJ150CA?
The SMAJ150AHM3/I is unidirectional, meaning it conducts only in reverse bias (cathode positive relative to anode) and blocks forward current - ideal for DC rail protection. In contrast, SMAJ150CA is bidirectional, offering symmetrical clamping in both polarities for AC or floating signal line protection. SMAJ150AHM3/I has a defined cathode band for polarity orientation, whereas SMAJ150CA has no marking and cannot be used for rectification or DC blocking functions.
What is the maximum operating temperature for the SMAJ150AHM3/I?
The SMAJ150AHM3/I supports a junction temperature range of –55 °C to +150 °C, with +150 °C as the absolute maximum. This rating is validated per thermal characterization data in the Vishay datasheet and allows reliable operation in high-ambient environments such as automotive engine compartments or industrial motor control enclosures - provided PCB copper pad area meets the 0.2" × 0.2" (5.0 mm × 5.0 mm) minimum recommendation for thermal dissipation.
Does the SMAJ150AHM3/I require derating above 25 °C ambient?
Yes, the SMAJ150AHM3/I must be derated above 25 °C ambient per Figure 2 in the Vishay datasheet (Document 88390). Its peak pulse power rating drops linearly from 400 W at 25 °C to 300 W at 78 V and above, with full derating to zero at +150 °C junction temperature. Designers must calculate actual junction temperature rise using RθJA = 120 °C/W and ensure thermal design maintains TJ ≤ 150 °C during surge events to preserve clamping performance and device longevity.
SMAJ150AHM3/I 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/I FAQ
1.How can I place an order for SMAJ150AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150AHM3/I 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/I reliable?
The price and inventory of SMAJ150AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ150AHM3/I is usually 5 days.
3.What payment methods are accepted for SMAJ150AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150AHM3/I?
SMAJ150AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150AHM3/I 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/I?
For technical support, including SMAJ150AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150AHM3/I requirements.
6.How does Aetrix verify that SMAJ150AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMAJ150AHM3/I 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/I meets industry standards.
7.What is the process for return or replacement of SMAJ150AHM3/I?
All SMAJ150AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150AHM3/I, 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/I part is unused and in its original packaging.
Return procedure for SMAJ150AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ150AHM3/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
