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Vishay General Semiconductor - Diodes Division SMAJ150AHE3/61
- Part No.:
- SMAJ150AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150AHE3/61.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,920
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Product details
Overview
SMAJ150AHE3/61 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 (IPPM), 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 SMAJ150AHE3/61 datasheet, SMAJ150AHE3/61 pinout, SMAJ150AHE3/61 application, or SMAJ150AHE3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, clamping performance under 10/1000 μs surge, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal bias it presents high impedance (<1.0 μA leakage at 150 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability across -55 °C to +150 °C operating range.
The device delivers 400 W peak pulse power up to 78 V and derates to 300 W above that level; clamping occurs within <1.0 ns response time, with low incremental surge resistance enabling effective energy diversion without overstressing downstream components like microcontrollers or gate drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 150 V - maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping onset. |
| VBR (Breakdown Voltage) | 167–185 V at 1 mA - precise voltage threshold where avalanche conduction begins; tight 10.8% tolerance enables predictable protection triggering. |
| VC (Clamping Voltage) | 243 V at IPPM = 1.2 A - maximum voltage seen by protected circuit during full-rated surge; critical for ensuring downstream component voltage ratings are not exceeded. |
| PPPM (Peak Pulse Power) | 400 W (≤78 V), 300 W (>78 V) - energy-handling capacity under standardized 10/1000 μs waveform; determines survivability against common lightning/inductive-switching surges. |
| ID (Reverse Leakage) | 1.0 μA max at 150 V - negligible standby current; avoids loading sensitive reference or bias networks in always-on systems. |
| TJ max. | +150 °C - maximum junction temperature; supports operation in under-hood automotive or enclosed industrial enclosures without derating. |
| RθJA | 120 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs PCB thermal design requirements for sustained power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Polarity indicated by cathode band; unidirectional configuration only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes conduction loop during transient clamping events. |
| Cathode | High-side connection point | Connected to protected line (e.g., 12 V rail or sensor output); reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS power domains. |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 3 surge (1 kV line-to-ground) without degradation when mounted per recommended pad layout. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift - critical for long-life industrial deployments. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without preconditioning; eliminates moisture-related popcorning risk. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected ICs - e.g., keeps 3.3 V logic inputs safely below absolute maximum ratings during surge events. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump transients (up to 120 V) on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and GND, triggered within <1 ns to clamp spikes before they reach MCU power pins. Use Value: Prevents latch-up or permanent damage to automotive-grade microcontrollers rated for 36 V absolute max, leveraging 243 V clamping at 1.2 A. |
Use Scenario: Protecting analog outputs of pressure sensors in factory automation PLC modules exposed to relay-coil switching noise. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground to absorb 100 V/1 A inductive kickback pulses induced by nearby solenoid actuation. Use Value: Maintains signal integrity by limiting transient overshoot to ≤243 V, avoiding ADC saturation or op-amp input stage damage in 24 V systems. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding PoE-powered network switches against AC-line coupled surges entering via 48 V DC input. IC Role / Device Role / Timing Role: Primary-level TVS on main DC bus, coordinated with upstream MOVs to handle fast-rising transients before they propagate to DC/DC converters. Use Value: Enables compliance with IEC 61000-4-5 Ed. 3 by limiting let-through voltage to <250 V during 2 Ω source impedance tests. |
Use Scenario: Clamping back-EMF from brushed DC motors in smart home vacuum cleaners during commutation and stall conditions. IC Role / Device Role / Timing Role: Mounted across motor terminals to divert inductive energy away from H-bridge MOSFETs during PWM turn-off. Use Value: Reduces MOSFET avalanche stress by lowering peak drain-source voltage to 243 V, extending FET lifetime in high-duty-cycle applications. |
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 | Commercial-grade version without AEC-Q101 qualification; identical electrical specs and package. | Lacks automotive reliability validation; unsuitable for under-hood or safety-critical modules. | Select when cost sensitivity outweighs automotive qualification requirements and environmental stress testing is handled at system level. |
| SMAJ150CAHE3/61 | Bidirectional variant with same VWM (150 V) and clamping (243 V), but symmetrical breakdown in both polarities. | Required for AC-coupled or floating signal lines where polarity reversal may occur; adds ~0.1 V VBR mismatch vs. unidirectional. | Choose only if bidirectional protection is mandated - e.g., RS-485 data lines - otherwise unidirectional offers tighter leakage and lower capacitance. |
Compared with SMAJ150AHE3/61, the E3/61 variant trades automotive qualification for lower unit cost in non-automotive settings, while the CAHE3/61 variant sacrifices unidirectional optimization (lower ID, faster response) to support AC signal paths - making SMAJ150AHE3/61 optimal for DC power rail protection where polarity is fixed and AEC-Q101 compliance is required.
Availability
SMAJ150AHE3/61 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer appliance motor drives requiring stable component supply with AEC-Q101 assurance and consistent surge performance.
Supply support for SMAJ150AHE3/61 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 application-specific optimization.
The SMAJ series targets robust transient suppression in harsh environments - engineered for automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated through proven clamping performance and qualification rigor.
FAQ
What is the clamping voltage of SMAJ150AHE3/61 at its rated peak pulse current?
The SMAJ150AHE3/61 has a maximum clamping voltage (VC) of 243 V when subjected to its specified peak pulse current (IPPM) of 1.2 A using the 10/1000 μs waveform. This value is measured under standardized test conditions per JEDEC and IEC standards and represents the upper voltage limit imposed on the protected circuit during full-rated surge events - critical for verifying compatibility with downstream component voltage tolerances.
Is SMAJ150AHE3/61 suitable for automotive applications?
Yes, SMAJ150AHE3/61 is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD verification per automotive requirements. Its construction - glass-passivated junction, MSL Level 1 rating, and operation up to +150 °C - makes it appropriate for engine control units, body electronics, and ADAS power domains where reliability under thermal and electrical stress is mandatory.
How does the unidirectional configuration of SMAJ150AHE3/61 affect its use in circuit design?
The unidirectional configuration of SMAJ150AHE3/61 means it conducts only when the cathode is positive relative to the anode - ideal for DC power rails and single-polarity signal lines. It exhibits lower reverse leakage (<1.0 μA at 150 V) and faster response than bidirectional variants, but requires correct polarity placement during layout. The cathode band must face the protected voltage rail, with anode tied to ground or return path.
What is the thermal resistance of SMAJ150AHE3/61, and how does it impact PCB layout?
SMAJ150AHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no additional heatsinking; designers must allocate sufficient copper area and consider airflow or adjacent heat sources to avoid exceeding the +150 °C maximum junction temperature during repetitive surge events or elevated ambient conditions.
Can SMAJ150AHE3/61 be used as a direct replacement for SMAJ150A-E3/61?
SMAJ150AHE3/61 shares identical electrical characteristics, package dimensions, and pinout with SMAJ150A-E3/61, differing only in qualification status: HE3 denotes AEC-Q101 qualification, while E3 is commercial grade. No PCB changes are needed for substitution, but SMAJ150AHE3/61 should be selected specifically when automotive or extended-reliability validation is required - the underlying silicon and construction are functionally equivalent.
SMAJ150AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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)
SMAJ150AHE3/61 FAQ
1.How can I place an order for SMAJ150AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150AHE3/61 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 SMAJ150AHE3/61 reliable?
The price and inventory of SMAJ150AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ150AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ150AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150AHE3/61?
SMAJ150AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150AHE3/61 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 SMAJ150AHE3/61?
For technical support, including SMAJ150AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150AHE3/61 requirements.
6.How does Aetrix verify that SMAJ150AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ150AHE3/61 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 SMAJ150AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ150AHE3/61?
All SMAJ150AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150AHE3/61, 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 SMAJ150AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ150AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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