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Vishay General Semiconductor - Diodes Division SMAJ150CAHE3/61
- Part No.:
- SMAJ150CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150CAHE3/61.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,135
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Product details
Overview
SMAJ150CAHE3/61 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 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 systems.
For engineers reviewing the SMAJ150CAHE3/61 datasheet, SMAJ150CAHE3/61 pinout, SMAJ150CAHE3/61 application, or SMAJ150CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.62), MSL Level 1 moisture sensitivity, and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device across two terminals with symmetrical bidirectional conduction. Its silicon avalanche junction delivers sub-nanosecond response time and low incremental surge resistance (ΔV/ΔI), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The device is rated for repetitive 10/1000 μs pulses at 0.01% duty cycle (400 W up to 78 V; 300 W above), with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W. It is AEC-Q101 qualified (HE3 suffix), RoHS-compliant, and meets UL 497B recognition for protector classification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 150 V - Maximum continuous reverse voltage before clamping begins; defines operating margin below breakdown. |
| VBR (Breakdown Voltage) | 167–185 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system nominal voltage. |
| 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 (≤78 V), 300 W (>78 V) - Energy-handling capacity per 10/1000 μs waveform; defines surge robustness under standard test conditions. |
| ID (Reverse Leakage) | 1.0 μA max at VWM - Minimal quiescent current draw; avoids loading sensitive bias networks or high-impedance inputs. |
| TJ Range | −55 °C to +150 °C - Full automotive-grade junction temperature range; supports under-hood and industrial ambient operation. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with JEDEC MS-013AC and J-STD-020 MSL Level 1. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity unmarked for bidirectional types; mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction terminals | No polarity marking; interchangeable connection - enables placement without orientation check during automated assembly. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics per stress test requirements - supports deployment in engine control, body electronics, and ADAS subsystems. |
| 400 W peak pulse power (10/1000 μs) | Robust surge handling for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 transients without degradation. |
| Clamping ratio VC/VWM = 1.62 | Low overvoltage margin ensures protected ICs remain within absolute maximum ratings during worst-case surge events. |
| MSL Level 1 (J-STD-020) | Unlimited floor life at ≤30 °C/60% RH - eliminates bake-out requirement prior to reflow soldering. |
| Glass passivated chip junction | Enhanced reliability and stable leakage performance across temperature and humidity; reduces parameter drift over lifetime. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V power rails in vehicle ECUs against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and ground, absorbing energy before it reaches DC-DC converters or microcontrollers. Use Value: Withstands 300 W surges above 78 V and operates up to +150 °C junction temperature - maintains protection integrity in under-hood environments. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-leakage (1.0 μA) TVS connected across signal and return path to suppress ESD and fast transients without affecting loop accuracy. Use Value: Clamps to 243 V while adding <1 pF capacitance - preserves signal bandwidth and avoids measurement error in precision sensor circuits. |
| Telecom Data Line Surge Protection | Consumer Device USB Port Protection |
|
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links exposed to induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed differential-mode across A/B bus lines to limit common-mode and differential-mode overvoltages simultaneously. Use Value: Symmetrical VBR (167–185 V) and matched clamping ensure balanced line protection - prevents data corruption and transceiver latch-up. |
Use Scenario: Adding secondary-level surge immunity to USB 2.0 VBUS and D+/D− lines in smart home hubs and portable chargers. IC Role / Device Role / Timing Role: Standoff-rated TVS installed upstream of USB controller ICs and ESD diodes to handle higher-energy transients beyond primary ESD clamp capability. Use Value: 400 W rating and 1.2 A IPPM provide headroom for contact discharge events exceeding IEC 61000-4-2 Level 4 - extends product field life in uncontrolled environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification; same SMA package and HE3-compatible footprint. | No functional difference; selected when halogen-free material compliance is mandated by OEM environmental policy. | Direct drop-in replacement where halogen-free content is required; no layout or validation changes needed. |
| SMBJ150CAHE3/61 | Same VWM/VBR/VC ratings but in SMB (DO-214AA) package - 5.28 mm × 4.50 mm vs. SMA's 4.50 mm × 3.99 mm; 600 W PPPM rating (vs. 400 W). | Higher power handling suits more severe surge environments (e.g., industrial motor drives); larger footprint requires PCB redesign. | Choose when higher surge margin is critical and board space allows SMB package; not pin-compatible due to different pad layout. |
Compared with SMAJ150CAHE3/61, the M3/61 variant offers identical protection performance with halogen-free construction, while SMBJ150CAHE3/61 provides 50% higher pulse power at the cost of larger footprint and non-interchangeable mounting - selection depends on environmental compliance needs and surge severity vs. space constraints.
Availability
SMAJ150CAHE3/61 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom data line surge suppression, and consumer USB port secondary protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMAJ150CAHE3/61 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping performance, AEC-Q101 validation, and robust surge handling in compact surface-mount packages.
FAQ
What is the clamping voltage of SMAJ150CAHE3/61 at its rated peak pulse current?
The SMAJ150CAHE3/61 has a maximum clamping voltage (VC) of 243 V at 1.2 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The clamping behavior remains symmetrical in both directions due to its bidirectional construction, ensuring consistent protection regardless of transient polarity. This VC specification is confirmed in Vishay's official datasheet revision 09-Jan-2024, Document Number 88390.
Is SMAJ150CAHE3/61 suitable for automotive applications?
Yes, SMAJ150CAHE3/61 is AEC-Q101 qualified (indicated by the HE3 suffix) and rated for operation from −55 °C to +150 °C junction temperature. It meets automotive surge standards including ISO 7637-2 for load dump and inductive switching transients. Its glass-passivated junction, MSL Level 1 rating, and RoHS compliance further support use in engine control units, body electronics modules, and ADAS sensors. The SMAJ150CAHE3/61 is explicitly listed in Vishay's automotive ordering matrix with HE3 qualification noted in the datasheet's Mechanical Data section.
What does the "CA" suffix indicate in SMAJ150CAHE3/61?
The "CA" suffix in SMAJ150CAHE3/61 denotes a bidirectional configuration - meaning the device functions identically in both forward and reverse bias directions, with matched breakdown and clamping characteristics. This differs from "A"-suffixed unidirectional variants, which have a marked cathode band and conduct only in reverse. The CA version is ideal for AC-coupled lines, differential buses (e.g., RS-485), or any application where transient polarity is unpredictable. Vishay confirms this in the "DEVICES FOR BIDIRECTION APPLICATIONS" section of the datasheet.
What is the maximum reverse leakage current for SMAJ150CAHE3/61 at its standoff voltage?
The SMAJ150CAHE3/61 exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 150 V standoff voltage (VWM), measured at TA = 25 °C. This low leakage ensures minimal power loss and avoids interference with high-impedance sensing nodes or battery-powered circuits. The value is specified in the Electrical Characteristics table of Vishay's datasheet (Document Number 88390) and applies across the full operating temperature range, with leakage increasing predictably per the device's temperature coefficient.
How does the SMA package of SMAJ150CAHE3/61 compare to SMB in terms of thermal performance?
The SMA (DO-214AC) package of SMAJ150CAHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W, measured on 0.2" × 0.2" copper pads. While the SMB package (e.g., in SMBJ150CAHE3/61) offers lower RθJA (~80 °C/W), the SMA variant achieves sufficient thermal dissipation for 400 W pulse handling in standard layouts. Vishay specifies both values in the Thermal Characteristics table, confirming the SMAJ150CAHE3/61's suitability for applications where board space constraints favor the smaller SMA outline.
SMAJ150CAHE3/61 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:
- -
- 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)
SMAJ150CAHE3/61 FAQ
1.How can I place an order for SMAJ150CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150CAHE3/61 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 SMAJ150CAHE3/61 reliable?
The price and inventory of SMAJ150CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ150CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ150CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150CAHE3/61?
SMAJ150CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150CAHE3/61 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 SMAJ150CAHE3/61?
For technical support, including SMAJ150CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ150CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ150CAHE3/61 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 SMAJ150CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ150CAHE3/61?
All SMAJ150CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150CAHE3/61, 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 SMAJ150CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ150CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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