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Vishay General Semiconductor - Diodes Division SMCJ120CAHE3_A/H
- Part No.:
- SMCJ120CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ120CAHE3_A/H.pdf
- Description:
- TVS DIODE 120VWM 193VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,477
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Product details
Overview
SMCJ120CAHE3_A/H 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 signal lines and power rails in automotive ECUs, industrial motor drives, and telecom interface circuits against lightning-induced transients and inductive switching spikes.
For engineers reviewing the SMCJ120CAHE3_A/H datasheet, SMCJ120CAHE3_A/H pinout, SMCJ120CAHE3_A/H application, or SMCJ120CAHE3_A/H equivalent, this part delivers AEC-Q101 qualification, low incremental surge resistance, and bidirectional clamping symmetry - critical for robust ESD and surge immunity in harsh-environment designs requiring UL 497B recognition and MSL Level 1 assembly compatibility.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse (or forward, in bidirectional mode) voltage exceeds its breakdown threshold (133–147 V), it transitions from high-impedance to low-impedance state within <1 ps, diverting transient energy to ground while limiting downstream voltage to ≤193 V. Its glass-passivated junction ensures stable leakage (<1 μA at 120 V) and repeatable clamping performance across temperature.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), enabling reliable operation on standard PCB copper pads (8.0 mm × 8.0 mm per terminal) without heatsinking under typical surge duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains high-energy surges per IEC 61000-4-5 Level 4 without degradation |
| Standoff Voltage (VWM) | 120 V - maximum continuous reverse operating voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 133–147 V at 1 mA - precise voltage threshold triggering clamping action |
| Clamping Voltage (VC) | 193 V at 7.8 A IPPM - limits protected circuit voltage during worst-case surge |
| Leakage Current (ID) | ≤1.0 μA at 120 V - negligible standby power loss and signal integrity impact |
| Operating Temperature | -55 °C to +150 °C - supports under-hood automotive and industrial ambient conditions |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode side marking) | Reference terminal for unidirectional polarity | Bidirectional variant SMCJ120CAHE3_A/H has no polarity marking - terminals are symmetrical and interchangeable |
| Anode (Cathode side marking) | Reference terminal for unidirectional polarity | Not applicable for bidirectional operation; both terminals function identically as clamping nodes |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Equal VBR and VC in both directions - eliminates need for polarity-aware layout in AC-coupled or differential lines |
| UL 497B recognition | QVGQ2 file E136766 - certified for telecom and data line surge protection per safety standard |
| Low incremental surge resistance | Enables tighter clamping margin (VC/VBR ≈ 1.45) - reduces overvoltage stress on downstream ICs |
| Fast response time | <1 ps - reacts before most microsecond-scale transients propagate into protected circuitry |
| MSL Level 1 compliance | No floor life limitation - supports standard SMT assembly without dry pack or baking |
Applications
| Automotive Body Control Module | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protecting LIN/CAN signal lines in door modules and lighting controllers from load dump and battery reverse connection events. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point, clamping surges before reaching transceiver ICs. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (75 V, 100 ms) and IEC 61000-4-5 4 kV surge tests without latch-up or degradation. |
Use Scenario: Safeguarding RS-485 and CAN FD physical layer transceivers in PLC backplanes and motor drive control boards. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on differential bus lines (CAN_H/CAN_L), symmetrically suppressing common-mode and differential-mode transients. Use Value: Enables >15 kV ESD contact immunity (IEC 61000-4-2) and 2 kV surge immunity (IEC 61000-4-5) without adding series impedance or signal distortion. |
| Telecom DSL Line Card | Consumer Appliance Motor Drive |
|
Use Scenario: Shielding ADSL/VDSL line interface transformers and PHY ICs from lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: Primary protection device mounted at RJ-11 jack input, coordinated with secondary GDT or MOV stages. Use Value: UL 497B certification ensures compliance with telecom safety standards; 1500 W rating handles multi-kA induced surges per ITU-T K.20/K.21. |
Use Scenario: Guarding gate drivers and MCU I/O pins in washing machine and HVAC inverter boards against commutation spikes from BLDC motors. IC Role / Device Role / Timing Role: Localized clamping element across DC bus rails and half-bridge gate supply lines to suppress dV/dt-induced coupling. Use Value: Withstands repeated 100 A/8.3 ms surge pulses (IFSM = 200 A) without parametric shift - extends field reliability in high-cycle appliances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120AHE3/A | Lower PPPM (400 W), smaller SMA package, unidirectional only | Limited to lower-energy transients; unsuitable for automotive load dump or telecom lightning | Select when space-constrained and surge threat level is ≤1 kV IEC 61000-4-5 |
| SMCJ120AHE3_A/H | Unidirectional version; same VWM/VBR/VC but asymmetric conduction | Requires polarity-aware placement; not usable on AC or differential signals without external bias | Choose only for DC rail protection where polarity is fixed and cost sensitivity outweighs design flexibility |
Compared with SMAJ120AHE3/A and SMCJ120AHE3_A/H, the SMCJ120CAHE3_A/H provides higher surge capacity, bidirectional symmetry, and AEC-Q101 validation - making it the preferred choice for automotive, industrial, and telecom applications demanding robust, polarity-agnostic protection.
Availability
SMCJ120CAHE3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial communication interfaces, and telecom line card designs requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101 qualified parts.
Supply support for SMCJ120CAHE3_A/H 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through proven clamping performance and qualification rigor.
FAQ
What is the clamping voltage of SMCJ120CAHE3_A/H at its rated peak pulse current?
The SMCJ120CAHE3_A/H has a maximum clamping voltage (VC) of 193 V when subjected to its specified peak pulse current (IPPM) of 7.8 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry remains below this voltage during surge events, protecting sensitive transceivers and microcontrollers connected to the same line.
Is SMCJ120CAHE3_A/H suitable for automotive applications?
Yes, SMCJ120CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its HE3 suffix and ordering code structure. It meets stress test requirements for high-temperature operating life, thermal cycling, and ESD robustness, and is commonly deployed in body control modules, infotainment power supplies, and ADAS sensor interfaces where ISO 7637-2 and IEC 61000-4-5 compliance is mandatory.
How does the bidirectional functionality of SMCJ120CAHE3_A/H affect PCB layout?
The bidirectional nature of SMCJ120CAHE3_A/H eliminates polarity marking - both terminals are electrically identical, allowing placement without orientation constraints. This simplifies layout for AC-coupled lines like CAN, RS-485, or telephone interfaces, avoids risk of reverse installation, and enables symmetric protection on differential pairs without additional routing complexity or component duplication.
What is the thermal resistance of SMCJ120CAHE3_A/H, and how does it impact derating?
SMCJ120CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W. At ambient temperatures above 25 °C, its peak pulse power must be derated per Figure 2 in the datasheet - for example, at 75 °C ambient, maximum PPPM drops to ~1100 W. Proper copper pad area (8.0 mm × 8.0 mm per terminal) is required to achieve these ratings.
Does SMCJ120CAHE3_A/H meet UL safety standards?
Yes, SMCJ120CAHE3_A/H carries Underwriters Laboratories recognition under UL 497B (file E136766) for both unidirectional and bidirectional configurations. This certification validates its suitability for primary and secondary circuit protection in telecom, networking, and industrial equipment where regulatory approval for surge protection devices is required prior to market release.
SMCJ120CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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_A/H FAQ
1.How can I place an order for SMCJ120CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ120CAHE3_A/H 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_A/H reliable?
The price and inventory of SMCJ120CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ120CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ120CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ120CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ120CAHE3_A/H?
SMCJ120CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ120CAHE3_A/H 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_A/H?
For technical support, including SMCJ120CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ120CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ120CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ120CAHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ120CAHE3_A/H?
All SMCJ120CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ120CAHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMCJ120CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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