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Vishay General Semiconductor - Diodes Division SMCJ120CAHE3/57T
- Part No.:
- SMCJ120CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ120CAHE3/57T.pdf
- Description:
- TVS DIODE 120VWM 193VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,560
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Product details
Overview
SMCJ120CAHE3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power rating, 193 V maximum clamping voltage at 7.8 A peak pulse current, and 120 V standoff voltage. It protects sensitive ICs, MOSFETs, and sensor signal lines in automotive and industrial power electronics against inductive switching transients and lightning-induced surges.
For engineers reviewing the SMCJ120CAHE3/57T datasheet, SMCJ120CAHE3/57T pinout, SMCJ120CAHE3/57T application, or SMCJ120CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, 120 V working voltage, and SMC package compatibility with automated PCB assembly.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at 120 V), while the low incremental surge resistance supports consistent clamping performance under repetitive 10/1000 μs transients.
The device is rated for operation from −55 °C to +150 °C junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance (RθJA = 75 °C/W) and RθJL = 15 °C/W enable effective heat dissipation when mounted on 8.0 mm × 8.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 120 V - Maximum continuous reverse voltage before clamping begins; defines operating margin for 120 V DC bus or AC peak applications. |
| Breakdown Voltage (VBR) | 133–147 V at 1 mA - Confirmed minimum/maximum threshold where avalanche conduction initiates reliably. |
| Clamping Voltage (VC) | 193 V at 7.8 A (10/1000 μs) - Peak voltage seen by protected circuit during full-rated surge; critical for downstream component voltage tolerance. |
| Peak Pulse Power (PPPM) | 1500 W - Energy-handling capacity for standardized 10/1000 μs waveform; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| Leakage Current (ID) | <1.0 μA at 120 V - Negligible standby power loss and minimal signal path loading in high-impedance circuits. |
| Operating Temperature | −55 °C to +150 °C - Supports under-hood automotive and industrial environments without derating up to TA = 25 °C. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic systems per stress test requirements including HTGB, HTRB, and temperature cycling. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; conducts surge current equally in either direction during overvoltage events. |
| Cathode | Transient current entry (bidirectional) | Second terminal of symmetrical structure; functionally identical to anode; no band marking distinguishes polarity. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses, or floating references without external polarity management. |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 combination wave surges up to 4 kV open-circuit / 2 kA short-circuit without degradation. |
| AEC-Q101 qualification | Validated reliability for automotive powertrain, body control, and ADAS modules requiring long-term field stability. |
| Low clamping ratio (VC/VWM ≈ 1.61) | Minimizes overvoltage stress on protected components compared to higher-ratio TVS devices. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; compatible with high-volume SMT production. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protection of 12 V/24 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power input rails to clamp positive and negative spikes simultaneously. Use Value: Prevents latch-up or gate oxide damage in microcontrollers and CAN transceivers during ISO 7637-2 Pulse 5a events. | Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor connected between signal line and ground, preserving signal integrity. Use Value: Limits voltage excursion to ≤193 V during 8 kV contact ESD (IEC 61000-4-2), avoiding ADC saturation or op-amp rail-to-rail clipping. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Surge suppression on RS-485 or Ethernet PHY lines exposed to induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed differentially across A/B lines and common-mode to ground. Use Value: Maintains signal eye diagram integrity by clamping transients within 1 ns response time while adding <1 pF parasitic capacitance. | Use Scenario: Input-stage protection for BLDC motor drivers subjected to back-EMF spikes during commutation. IC Role / Device Role / Timing Role: High-power TVS across DC bus terminals to absorb inductive energy from motor windings. Use Value: Absorbs up to 1500 W transient energy without failure, eliminating need for snubber RC networks in cost-sensitive white goods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CAHE3/52T | 600 W PPPM, SMB package (smaller footprint, lower surge rating) | Suitable for space-constrained consumer electronics with lower surge exposure (IEC 61000-4-2 only) | Select when board area is limited and peak surge energy does not exceed 600 W. |
| SMCJ120AHE3/57T | Unidirectional version; same VWM, VC, and PPPM; cathode band marking required | Applicable only in DC-biased circuits where polarity is fixed and reverse conduction must be blocked | Choose only if system architecture guarantees unidirectional surge polarity and requires reverse blocking. |
Compared with SMBJ120CAHE3/52T and SMCJ120AHE3/57T, the SMCJ120CAHE3/57T uniquely delivers 1500 W bidirectional surge handling in the SMC package-making it the sole option for automotive-grade, high-energy, polarity-agnostic protection without layout redesign.
Availability
SMCJ120CAHE3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom line protection, and consumer appliance motor control requiring stable component supply and AEC-Q101 compliance.
Supply support for SMCJ120CAHE3/57T 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 SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and long-term parametric stability are mandatory.
FAQ
What is the clamping voltage of the SMCJ120CAHE3/57T under full-rated surge conditions?
The SMCJ120CAHE3/57T clamps to a maximum of 193 V when subjected to its rated 7.8 A peak pulse current (10/1000 μs waveform). This value is measured per ANSI/IEEE C62.35 standards and confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88394. The clamping voltage directly determines the maximum overvoltage stress imposed on downstream components during surge events, making it a critical parameter for interface IC selection.
Is the SMCJ120CAHE3/57T suitable for automotive applications?
Yes, the SMCJ120CAHE3/57T is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix. It undergoes stress testing including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling to ensure reliability in engine control units, body electronics, and ADAS modules. Its 1500 W surge rating and −55 °C to +150 °C operating range meet ISO 16750-2 and ISO 7637-2 requirements.
How does the bidirectional design of the SMCJ120CAHE3/57T affect circuit layout?
The SMCJ120CAHE3/57T has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. Unlike unidirectional TVS diodes, it requires no cathode alignment check and can protect AC-coupled signals, differential buses (e.g., RS-485), or floating grounds without additional components. This simplifies layout, reduces assembly errors, and avoids potential misplacement that could compromise protection in bidirectional systems.
What is the thermal resistance of the SMCJ120CAHE3/57T, and how does it impact PCB design?
The SMCJ120CAHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures under repeated surges, designers must provide adequate copper pour area and avoid excessive trace length between the device and ground planes. Derating curves in Figure 2 of the datasheet guide thermal design above 25 °C ambient.
Does the SMCJ120CAHE3/57T require special handling or packaging considerations?
No special handling is required: the SMCJ120CAHE3/57T is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and withstands standard 260 °C peak reflow profiles without baking. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for solderability, and the 7" tape-and-reel packaging (57T) supports high-speed pick-and-place assembly. No moisture barrier bag or dry pack is needed for storage or SMT processing.
SMCJ120CAHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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):
- 7.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SMCJ120CAHE3/57T FAQ
1.How can I place an order for SMCJ120CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ120CAHE3/57T 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 SMCJ120CAHE3/57T reliable?
The price and inventory of SMCJ120CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ120CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ120CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ120CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ120CAHE3/57T?
SMCJ120CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ120CAHE3/57T 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 SMCJ120CAHE3/57T?
For technical support, including SMCJ120CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ120CAHE3/57T requirements.
6.How does Aetrix verify that SMCJ120CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ120CAHE3/57T 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 SMCJ120CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ120CAHE3/57T?
All SMCJ120CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ120CAHE3/57T, 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 SMCJ120CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ120CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ120CAHE3/57T Tags
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