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Vishay General Semiconductor - Diodes Division SMCJ70CAHE3_A/H
- Part No.:
- SMCJ70CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70CAHE3_A/H.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,060
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Product details
Overview
SMCJ70CAHE3_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. It features a 70 V standoff voltage (VWM), 113 V maximum clamping voltage (VC) at 13.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed to safeguard automotive sensor signal lines, industrial I/O ports, and telecom interface circuits against ESD and inductive switching transients.
For engineers reviewing the SMCJ70CAHE3_A/H datasheet, SMCJ70CAHE3_A/H pinout, SMCJ70CAHE3_A/H application, or SMCJ70CAHE3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT assembly on standard 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at VWM), but triggers into low-impedance conduction when transient voltage exceeds its breakdown range (77.8–86.0 V at 1 mA). Its glass-passivated junction ensures stable avalanche behavior and fast response (<1 ns), while the bidirectional architecture eliminates polarity dependency in AC-coupled or differential signal paths.
The SMCJ70CAHE3_A/H is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards - confirming suitability for high-reliability automotive and industrial PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 48 V or 60 V nominal systems. |
| VBR min/max | 77.8 V / 86.0 V at 1 mA - verified breakdown threshold range ensuring consistent turn-on across production lots and temperature. |
| VC @ IPPM | 113 V at 13.3 A (10/1000 µs) - clamping voltage limiting downstream IC stress during worst-case surge events. |
| PPPM | 1500 W - peak pulse power handling capacity enabling protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω). |
| TJ max | +150 °C - junction temperature limit supporting operation in under-hood automotive environments and sealed industrial enclosures. |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard 8.0 mm × 8.0 mm copper pads; informs heatsinking requirements. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per AEC specification. |
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); molded compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | Conducts surge current in either direction; connects to protected line without polarity constraint. |
| Cathode | Transient current sink (bidirectional) | Functionally identical to Anode in CA devices; both terminals symmetrically clamp positive/negative transients. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded sensor outputs without polarity concerns. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS camera links, and body electronics requiring long-term field reliability. |
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics over 1000+ surge cycles and >15-year operational life in harsh thermal environments. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving protection margin for sensitive 3.3 V/5 V logic. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C without moisture-induced popcorning, eliminating bake requirements pre-assembly. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN FD or LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt TVS diode providing sub-ns response to clamp transients up to ±100 V before they reach the transceiver's ESD structure. Use Value: Prevents latch-up or gate oxide damage in automotive-grade transceivers by limiting clamped voltage to 113 V at 13.3 A surge. |
Use Scenario: Safeguarding digital input/output channels on programmable logic controller (PLC) backplanes interfacing with 24 V DC field wiring prone to inductive kickback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp absorbing energy from relay coil de-energization or motor stop events on 24 V supply rails. Use Value: Enables robust 1500 W surge handling without external series impedance, maintaining signal integrity during 4 kV IEC 61000-4-5 compliance testing. |
| Telecom Interface Protection | Consumer Power Adapter ESD Guard |
|
Use Scenario: Shielding Ethernet PHY interfaces (10/100BASE-TX) and PoE-powered device front-ends from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS placed at RJ-45 connector to divert common-mode surges before reaching magnetics and PHY IC. Use Value: Clamps differential and common-mode transients symmetrically with matched VBR min/max (77.8–86.0 V), preserving signal balance. |
Use Scenario: Adding secondary-side surge immunity to USB-C PD adapters and wireless charging base stations where internal 5–20 V rails require transient suppression. IC Role / Device Role / Timing Role: Secondary TVS on output side to absorb residual transients escaping primary-side MOVs and Y-capacitors. Use Value: Provides 113 V clamping at 70 V nominal output, preventing overvoltage damage to USB-PD controllers and battery management ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CAHE3_A/H | Lower PPPM (600 W vs. 1500 W); same VWM (70 V), VC (113 V), and SMC package footprint. | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy threats like ESD (IEC 61000-4-2) or small inductive loads. | Select when board space allows SMB size and surge energy is ≤600 W; verify thermal derating at elevated ambient temperatures. |
| SMCJ70AHE3_A/H | Unidirectional version; identical VWM, VC, PPPM, and package, but requires correct polarity placement and adds cathode band marking. | Applicable only in DC-biased or ground-referenced circuits; unsuitable for AC or floating differential lines. | Choose only if system topology guarantees unidirectional threat polarity and layout accommodates orientation-sensitive placement. |
Compared with SMCJ70CAHE3_A/H, SMBJ70CAHE3_A/H offers smaller footprint but reduced surge capacity, while SMCJ70AHE3_A/H provides identical power handling with stricter polarity constraints - making the bidirectional SMCJ70CAHE3_A/H optimal for flexible, polarity-agnostic protection in mixed-signal and automotive domains.
Availability
SMCJ70CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom interface boards, and consumer power adapter designs requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMCJ70CAHE3_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 targets high-energy transient suppression in automotive, industrial, and telecom infrastructure - engineered for robustness under extreme thermal cycling, mechanical shock, and repetitive surge stress.
FAQ
What is the clamping voltage of SMCJ70CAHE3_A/H at its rated peak pulse current?
The SMCJ70CAHE3_A/H has a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current (IPPM) of 13.3 A using the standardized 10/1000 µs waveform. This value is measured under defined test conditions per ANSI/IEEE C62.35 and ensures predictable voltage limiting during surge events. The clamping performance remains symmetrical in both directions due to its bidirectional construction, and SMCJ70CAHE3_A/H maintains this specification across its qualified operating temperature range.
Is SMCJ70CAHE3_A/H qualified for automotive applications?
Yes, SMCJ70CAHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in the SMCJ5.0A–SMCJ188CA datasheet (Document Number: 88394, Revision: 09-Jan-2024). This qualification covers stress tests including high-temperature operating life, temperature cycling, unbiased highly accelerated stress testing, and ESD per HBM and CDM models. SMCJ70CAHE3_A/H is therefore approved for use in automotive powertrain, chassis, and body electronics where long-term reliability under thermal and electrical stress is mandatory.
How does the bidirectional design of SMCJ70CAHE3_A/H affect circuit layout?
The bidirectional design of SMCJ70CAHE3_A/H eliminates polarity marking and enables placement between any two nodes without regard to voltage reference - ideal for protecting differential pairs (e.g., RS-485, CAN), AC-coupled signals, or floating sensor outputs. Unlike unidirectional variants, SMCJ70CAHE3_A/H requires no cathode band alignment during pick-and-place, simplifying automated assembly and reducing layout constraints. Its symmetrical VBR (77.8–86.0 V) and VC ensure matched clamping behavior for both positive and negative transients, which directly impacts PCB routing by allowing direct line-to-line or line-to-ground placement without bias network dependencies.
What is the thermal resistance of SMCJ70CAHE3_A/H, and how does it impact PCB design?
SMCJ70CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 8.0 mm × 8.0 mm copper pads per terminal, as specified in the Vishay datasheet. This value directly determines allowable power dissipation at elevated ambient temperatures: for example, at TA = 85 °C, the maximum continuous power (PD) must be derated from 6.5 W to ~4.4 W to maintain TJ ≤ 150 °C. PCB designers must allocate sufficient copper area and consider thermal vias beneath the SMC pad to meet this RθJA target - undersized pads will increase junction temperature and risk premature failure during repeated surge events.
Can SMCJ70CAHE3_A/H replace SMCJ70AHE3_A/H in an existing design?
SMCJ70CAHE3_A/H can replace SMCJ70AHE3_A/H only if the circuit does not rely on unidirectional conduction or polarity-specific behavior - for instance, in AC-coupled or differential signal paths where bidirectional clamping is acceptable or preferred. However, substitution is not drop-in: SMCJ70CAHE3_A/H lacks the cathode band marking of the unidirectional version and exhibits identical electrical specs except for polarity dependence. Layout changes are unnecessary, but functional validation is required to confirm that reverse-bias leakage and clamping symmetry meet system-level surge immunity requirements. SMCJ70CAHE3_A/H is not a pin-compatible substitute in DC-biased applications requiring strict anode/cathode orientation.
SMCJ70CAHE3_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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 13.3A
- 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)
SMCJ70CAHE3_A/H FAQ
1.How can I place an order for SMCJ70CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70CAHE3_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 SMCJ70CAHE3_A/H reliable?
The price and inventory of SMCJ70CAHE3_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 SMCJ70CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ70CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70CAHE3_A/H?
SMCJ70CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70CAHE3_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 SMCJ70CAHE3_A/H?
For technical support, including SMCJ70CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70CAHE3_A/H requirements.
6.How does Aetrix verify that SMCJ70CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ70CAHE3_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 SMCJ70CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ70CAHE3_A/H?
All SMCJ70CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70CAHE3_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 SMCJ70CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMCJ70CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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