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Vishay General Semiconductor - Diodes Division SMAJ150CAHE3/5A
- Part No.:
- SMAJ150CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150CAHE3/5A.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,673
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Product details
Overview
SMAJ150CAHE3/5A from Vishay General Semiconductor is a bidirectional 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 range (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 SMAJ150CAHE3/5A datasheet, SMAJ150CAHE3/5A pinout, SMAJ150CAHE3/5A application, or SMAJ150CAHE3/5A equivalent, this device is selected for high-reliability transient suppression where AEC-Q101 qualification, low clamping ratio, and MSL Level 1 moisture sensitivity are required in space-constrained PCB layouts.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ns), while the SMA package supports automated placement and meets UL 94 V-0 flammability requirements.
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, enabling operation up to +150 °C junction temperature. The device sustains 40 A non-repetitive surge current (IFSM) and complies with ANSI/IEEE C62.35 standards for transient suppressor characterization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 150 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 167–185 V at 1 mA - Confirmed minimum/maximum voltage at which device enters avalanche breakdown; ensures predictable turn-on. |
| VC (Clamping Voltage) | 243 V at IPPM = 1.2 A - Peak voltage seen by protected circuit during 10/1000 μs transient; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy handling capability under standard 10/1000 μs waveform; derates to 300 W above 78 V. |
| IPPM (Peak Pulse Current) | 1.2 A - Maximum surge current supported at rated clamping voltage; directly limits protection level for given line impedance. |
| TJmax | +150 °C - Maximum allowable junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical avalanche junction; accepts surge current from either polarity without cathode band identification. |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical junction; completes low-impedance path during overvoltage event regardless of voltage polarity. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM performance in both directions - eliminates need for polarity-aware layout in AC-coupled or floating lines. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS power supplies - ensures long-term reliability under thermal and mechanical stress. |
| Low clamping ratio (VC/VWM ≈ 1.62) | Minimizes overvoltage stress on protected ICs - critical for safeguarding 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 - reduces manufacturing risk and cost. |
| Glass passivated junction | Stable leakage (<1.0 μA at VWM) and repeatable breakdown - maintains protection integrity over lifetime and temperature extremes. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V/24 V vehicle battery lines feeding ECUs and body controllers. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across input rail to shunt surges >150 V before they reach DC-DC converters and microcontrollers. Use Value: Limits peak rail voltage to ≤243 V during ISO 7637-2 Pulse 5a events, preventing latch-up or permanent damage to downstream 150 V-rated power stages. |
Use Scenario: Protecting analog front-end inputs of pressure/temperature sensors connected to long harnesses in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector interface to absorb ESD and inductive switching noise coupled onto signal lines. Use Value: Clamps transients within <1 ns while maintaining <1.0 μA leakage at 150 V - preserves signal integrity and avoids false triggering in precision measurement circuits. |
| Telecom DC Power Feeds | Renewable Energy Inverter DC Link |
|
Use Scenario: Safeguarding -48 V telecom rectifier outputs against lightning-induced surges entering central office equipment. IC Role / Device Role / Timing Role: Standoff-rated TVS installed between DC output and ground to clamp common-mode transients exceeding system insulation rating. Use Value: Withstands 400 W pulses and operates up to +150 °C - suitable for sealed, high-temperature telecom cabinets without derating. |
Use Scenario: Mitigating voltage spikes caused by rapid IGBT switching in solar PV string inverters' DC link section. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing commutation overshoots before they propagate to electrolytic bus capacitors and gate drivers. Use Value: 243 V clamping at 1.2 A enables coordination with 300–400 V DC link ratings - prevents overvoltage failure without requiring active snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150CA-M3/5A | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is mandated by OEM or regional regulation. | Choose SMAJ150CA-M3/5A if halogen-free composition is required; otherwise SMAJ150CAHE3/5A offers same performance with standard RoHS compliance. |
| SMAJ150AHE3/5A | Unidirectional version; includes cathode band marking and forward voltage drop (VF = 3.5 V @ 25 A). | Not usable in AC or floating-bias applications; requires correct polarity orientation during placement. | Select SMAJ150AHE3/5A only for DC-only lines with known polarity; SMAJ150CAHE3/5A is mandatory for bidirectional or unknown-polarity protection. |
Compared with SMAJ150CA-M3/5A, the HE3 suffix indicates standard RoHS compliance without halogen restriction, while SMAJ150AHE3/5A lacks bidirectional symmetry - making SMAJ150CAHE3/5A uniquely suited for automotive CAN/LIN bus power rails and isolated sensor supplies where polarity independence is essential.
Availability
SMAJ150CAHE3/5A is available at Aetrix Electronics and suitable for automotive ECU power conditioning, industrial sensor interface protection, and telecom DC feed surge suppression requiring stable component supply, full traceability, and AEC-Q101 assurance.
Supply support for SMAJ150CAHE3/5A 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 validation.
The SMAJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom applications demanding robustness, low clamping, and standardized qualification.
FAQ
What is the clamping voltage of the SMAJ150CAHE3/5A under a 10/1000 μs transient?
The SMAJ150CAHE3/5A 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 confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88390. The clamping performance remains consistent in both directions due to its bidirectional design.
Is the SMAJ150CAHE3/5A suitable for automotive applications?
Yes, the SMAJ150CAHE3/5A is AEC-Q101 qualified, as indicated by the "HE3" suffix in its ordering code. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD verification - making it appropriate for under-hood ECUs, ADAS modules, and body control units where transient immunity and long-term reliability are critical.
What does the "CA" suffix mean in SMAJ150CAHE3/5A?
The "CA" suffix denotes a bidirectional configuration: the SMAJ150CAHE3/5A provides symmetrical transient suppression in both forward and reverse directions, with identical breakdown and clamping characteristics. Unlike unidirectional variants (e.g., SMAJ150A), it has no cathode band marking and is used where voltage polarity is undefined or alternating - such as across floating sensor supplies or AC-coupled data lines.
What is the maximum operating temperature for the SMAJ150CAHE3/5A?
The SMAJ150CAHE3/5A supports an operating junction temperature range of –55 °C to +150 °C. Its thermal resistance values (RθJA = 120 °C/W, RθJL = 30 °C/W) allow reliable operation in high-ambient environments like automotive engine compartments or industrial motor drives - provided PCB copper pad area meets the 0.2" × 0.2" (5.0 mm × 5.0 mm) recommendation.
How does the SMAJ150CAHE3/5A differ from the SMAJ150AHE3/5A?
The SMAJ150CAHE3/5A is bidirectional with symmetrical clamping, while the SMAJ150AHE3/5A is unidirectional and includes a cathode band marking. The unidirectional version exhibits forward voltage drop (VF = 3.5 V at 25 A) and cannot suppress reverse-polarity transients. For applications with uncertain or alternating voltage polarity - such as CAN bus power rails - only the SMAJ150CAHE3/5A is appropriate.
SMAJ150CAHE3/5A 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ150CAHE3/5A FAQ
1.How can I place an order for SMAJ150CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150CAHE3/5A 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 SMAJ150CAHE3/5A reliable?
The price and inventory of SMAJ150CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ150CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ150CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150CAHE3/5A?
SMAJ150CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150CAHE3/5A 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 SMAJ150CAHE3/5A?
For technical support, including SMAJ150CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150CAHE3/5A requirements.
6.How does Aetrix verify that SMAJ150CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ150CAHE3/5A 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 SMAJ150CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ150CAHE3/5A?
All SMAJ150CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150CAHE3/5A, 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 SMAJ150CAHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ150CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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