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Vishay General Semiconductor - Diodes Division SMAJ120CAHE3/61
- Part No.:
- SMAJ120CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ120CAHE3/61.pdf
- Description:
- TVS DIODE 120VWM 193VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,895
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Product details
Overview
SMAJ120CAHE3/61 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 120 V standoff voltage (VWM), 133–147 V breakdown voltage (VBR) at 1 mA, 193 V maximum clamping voltage (VC) at 1.6 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform) - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMAJ120CAHE3/61 datasheet, SMAJ120CAHE3/61 pinout, SMAJ120CAHE3/61 application, or SMAJ120CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C junction temperature rating, low incremental surge resistance, and compatibility with automated SMT assembly on standard PCB copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical reverse/forward conduction behavior due to its bidirectional construction. Its silicon avalanche junction delivers sub-nanosecond response time and stable clamping under repetitive 10/1000 μs surge events up to 0.01% duty cycle.
Thermal performance is defined by RθJA = 120 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 30 °C/W, enabling reliable operation up to TJ = 150 °C. The HE3 suffix confirms RoHS-compliance and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 133 V / 147 V at IT = 1 mA - guaranteed avalanche initiation range for predictable turn-on |
| VC @ IPPM | 193 V at 1.6 A - clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 400 W - peak transient energy absorption capability per single pulse (derated above 78 V) |
| ID @ VWM | 1.0 μA - ultra-low leakage ensures minimal standby power loss in high-impedance circuits |
| TJ max. | +150 °C - extended thermal operating range supports under-hood and industrial environments |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline compatible with JEDEC MS-013AA footprint |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; meets UL 94 V-0, MSL Level 1 (260 °C reflow peak), and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetric with cathode in bidirectional mode | No polarity marking; terminals are functionally identical for transient suppression in either direction |
| Cathode | Current exit terminal in forward bias; symmetric with anode in bidirectional mode | Unmarked - bidirectional operation eliminates cathode/anode distinction in circuit layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM |
| 400 W peak pulse power | Handles IEC 61000-4-5 surge waveforms without degradation when mounted on 5 mm × 5 mm copper pads |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to protected ICs - critical for 12 V and 24 V rail protection |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; supports high-yield automated assembly |
| Glass-passivated junction | Ensures long-term stability of breakdown characteristics under thermal cycling and humidity |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump and jump-start transients on 24 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across input rails upstream of DC/DC converters and LDOs. Use Value: Limits voltage excursions to ≤193 V during 120 V nominal rail surges, preventing damage to 36 V-rated input stages. |
Use Scenario: Guarding analog front-ends of pressure, temperature, and position sensors exposed to EMI in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting fast transients (<1 ns rise time) on differential or single-ended signal lines. Use Value: Sub-1 μA leakage preserves sensor offset accuracy; 193 V clamping protects 16-bit ADC inputs referenced to 5 V or 3.3 V rails. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding PoE-powered network switches and base station RF modules against lightning-induced surges on 48 V DC inputs. IC Role / Device Role / Timing Role: Primary-level TVS on main DC input, coordinated with upstream fuses and secondary-stage polymer PTCs. Use Value: Withstands repeated 10/1000 μs surges up to 400 W, maintaining clamping performance after >1000 pulses per IEC 61000-4-5 Ed. 3. |
Use Scenario: Protecting microcontroller GPIOs and gate drivers in washing machine motor control boards from inductive kickback. IC Role / Device Role / Timing Role: Localized TVS on H-bridge supply rails and feedback sensing nodes adjacent to BLDC motor windings. Use Value: Fast response (<1 ns) prevents latch-up in 3.3 V logic; AEC-Q101 qualification ensures robustness in thermally demanding appliance enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No difference in circuit design or layout; differs only in material composition compliance | Select when halogen-free bill-of-materials is required for environmental certification |
| SMBJ120CAHE3/61 | Same VWM/VBR/VC ratings but in SMB (DO-214AA) package - 27% larger footprint, 50% higher PPPM (600 W) | Requires PCB pad revision; better suited for higher-energy surge environments (e.g., 48 V telecom) | Choose when system-level surge testing exceeds 400 W or thermal margin is constrained |
Compared with SMAJ120CAHE3/61, the M3 variant offers identical protection performance with halogen-free materials, while the SMBJ120CAHE3/61 provides higher surge capacity at the cost of board space - enabling trade-offs between footprint efficiency and robustness in harsh ESD/lightning-prone applications.
Availability
SMAJ120CAHE3/61 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer appliance motor controllers requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMAJ120CAHE3/61 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 cost-sensitive, high-volume transient suppression needs in automotive, industrial, and communications systems - delivering standardized TVS performance in compact surface-mount packages with rigorous qualification.
FAQ
What does the "CA" suffix indicate in SMAJ120CAHE3/61?
The "CA" suffix denotes a bidirectional configuration - meaning SMAJ120CAHE3/61 conducts and clamps symmetrically in both polarities, unlike unidirectional "A" variants that require correct cathode orientation. This makes SMAJ120CAHE3/61 ideal for AC-coupled lines or DC rails where polarity reversal risk exists, eliminating layout dependency on signal direction.
Is SMAJ120CAHE3/61 suitable for IEC 61000-4-5 surge testing?
Yes - SMAJ120CAHE3/61 is rated for 400 W peak pulse power with a 10/1000 μs waveform, directly aligning with the combination wave (1.2/50 μs voltage, 8/20 μs current) defined in IEC 61000-4-5. When mounted per recommended 0.2" × 0.2" copper pads, it reliably clamps to ≤193 V during 1 kV/0.5 kA surges, meeting Level 3 and Level 4 immunity requirements.
How does the HE3 suffix affect compliance and use of SMAJ120CAHE3/61?
The HE3 suffix certifies that SMAJ120CAHE3/61 is RoHS-compliant and AEC-Q101 qualified - confirming it has passed accelerated stress tests for automotive environments including temperature cycling, high-temperature operating life, and ESD. This enables direct use in automotive infotainment, ADAS, and powertrain modules without additional qualification.
What is the maximum allowable mounting temperature for SMAJ120CAHE3/61 during reflow?
SMAJ120CAHE3/61 meets MSL Level 1 per J-STD-020, allowing a maximum peak reflow temperature of 260 °C for up to 30 seconds. Its glass-passivated junction and matte tin plating ensure solder joint integrity and parametric stability through standard lead-free reflow profiles without pre-baking.
Can SMAJ120CAHE3/61 replace SMAJ120AHE3/61 in an existing design?
No - SMAJ120CAHE3/61 is bidirectional while SMAJ120AHE3/61 is unidirectional; substituting them requires verifying circuit polarity and clamping behavior. SMAJ120AHE3/61 has a cathode band marking and conducts only in reverse bias, whereas SMAJ120CAHE3/61 has no marking and clamps identically in both directions - altering protection strategy in DC-only applications.
SMAJ120CAHE3/61 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):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 1.6A
- 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)
SMAJ120CAHE3/61 FAQ
1.How can I place an order for SMAJ120CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ120CAHE3/61 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 SMAJ120CAHE3/61 reliable?
The price and inventory of SMAJ120CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ120CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ120CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ120CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ120CAHE3/61?
SMAJ120CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ120CAHE3/61 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 SMAJ120CAHE3/61?
For technical support, including SMAJ120CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ120CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ120CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ120CAHE3/61 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 SMAJ120CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ120CAHE3/61?
All SMAJ120CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ120CAHE3/61, 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 SMAJ120CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ120CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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