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Vishay General Semiconductor - Diodes Division SMCJ70AHE3_A/I
- Part No.:
- SMCJ70AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70AHE3_A/I.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,193
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Product details
Overview
SMCJ70AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 70 V standoff voltage (VWM), 77.8–86.0 V breakdown range (VBR at 1 mA), 113 V clamping voltage (VC) at 13.3 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 μs waveform), commonly deployed in automotive power supply input stages.
For engineers reviewing the SMCJ70AHE3_A/I datasheet, SMCJ70AHE3_A/I pinout, SMCJ70AHE3_A/I application, or SMCJ70AHE3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W surge capability, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold, limiting transient energy to safe levels for downstream ICs and MOSFETs. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns), while the SMC package supports high surge current handling without thermal runaway under repetitive transients.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and is qualified to AEC-Q101 for automotive use - confirmed by the "HE3" suffix and ordering code SMCJ70AHE3_A/I. Its unidirectional configuration requires cathode-band orientation during PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - Breakdown onset range; determines minimum overvoltage triggering threshold. |
| VC @ IPPM | 113 V at 13.3 A - Clamped voltage during 10/1000 μs surge; sets worst-case stress on protected circuitry. |
| PPPM | 1500 W - Peak pulse power handling; enables protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| IPPM | 13.3 A - Peak surge current supported at VC; correlates directly with PCB trace width and pad thermal design. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive environments. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm pads; guides heatsinking requirements. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity marked by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to system ground or lower-potential node; defines directionality of clamping action. |
| Cathode | Reverse voltage input / Clamping output | Connected to protected line (e.g., 12 V rail); conducts avalanche current to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring long-term reliability under thermal cycling. |
| 1500 W peak pulse power | Withstands high-energy transients such as load dump (ISO 16750-2) and alternator ripple without degradation. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive 5 V or 3.3 V logic interfaces. |
| MSL Level 1 moisture sensitivity | Enables direct placement into reflow ovens without baking; compatible with standard SMT production lines. |
| Glass passivated junction | Ensures stable leakage current (<1.0 μA) and consistent VBR over lifetime and temperature extremes. |
Applications
| Automotive Power Input Protection | Industrial DC Power Rail Clamp |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump spikes up to 35 V and ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and input filter capacitor. Use Value: Limits transient voltage to ≤113 V, preventing damage to upstream regulators and microcontrollers rated for 16 V absolute maximum. | Use Scenario: Safeguarding 24 V PLC I/O modules against inductive switching surges from solenoid drivers. IC Role / Device Role / Timing Role: Standoff protector on field-side power input, coordinated with upstream fuse and common-mode choke. Use Value: Absorbs 1500 W surges without failure, maintaining system uptime in factory automation environments with frequent relay actuation. |
| Telecom DC Feeder Line Protection | Consumer Power Adapter Output Clamp |
Use Scenario: Shielding PoE-powered equipment (e.g., IP cameras) from lightning-induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input stage, upstream of DC-DC converter. Use Value: Fast <1 ns response ensures clamping occurs before secondary protection (e.g., polyfuse) trips, preserving signal integrity. | Use Scenario: Preventing overvoltage damage to USB-C PD sink circuits during adapter fault conditions. IC Role / Device Role / Timing Role: Secondary-level TVS on 5–20 V output rail of AC-DC adapter, after primary regulation. Use Value: 70 V VWM provides sufficient margin above 20 V PD profiles while enabling tight VC control at 113 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70AHE3_A/I | Lower PPPM (400 W), smaller SMA package, same VWM/VC specs. | Limited to lower-energy transients (e.g., ESD only); unsuitable for load dump or IEC 61000-4-5. | Select when space-constrained and surge energy is ≤400 W. |
| SMCJ70CAHE3_A/I | Bidirectional variant; symmetric VBR and VC in both polarities; same PPPM and package. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal may occur. | Choose for bidirectional protection needs; not interchangeable without layout revision. |
Compared with SMAJ70AHE3_A/I and SMCJ70CAHE3_A/I, the SMCJ70AHE3_A/I delivers higher surge robustness in a standardized automotive-grade SMC footprint, making it optimal for unidirectional DC rail protection where 1500 W capability and AEC-Q101 compliance are mandatory.
Availability
SMCJ70AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, telecom power feeding systems, and consumer power adapter designs requiring stable component supply across extended product lifecycles.
Supply support for SMCJ70AHE3_A/I 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 automotive qualification.
The SMCJ series is engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 validation and 1500 W surge capability.
FAQ
What is the clamping voltage of the SMCJ70AHE3_A/I under a 10/1000 μs surge?
The SMCJ70AHE3_A/I has a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current of 13.3 A using the standard 10/1000 μs waveform. This value is measured at TA = 25 °C on 8.0 mm × 8.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ70AHE3_A/I maintains this clamping performance consistently due to its low incremental surge resistance and glass-passivated junction.
Is the SMCJ70AHE3_A/I qualified for automotive applications?
Yes, the SMCJ70AHE3_A/I is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its ordering code and explicit listing in Vishay's AEC-Q101 documentation. It is rated for operation from -55 °C to +150 °C and meets MSL Level 1 for lead-free reflow. The SMCJ70AHE3_A/I is intended for under-hood and chassis-mounted automotive electronics including body control modules, lighting drivers, and infotainment power supplies.
How does the SMCJ70AHE3_A/I differ from the bidirectional SMCJ70CAHE3_A/I?
The SMCJ70AHE3_A/I is unidirectional, with polarity marked by a cathode band and functional only in reverse-bias clamping mode, whereas the SMCJ70CAHE3_A/I is bidirectional and symmetrical in both polarities. Both share identical package (SMC), PPPM (1500 W), and thermal ratings, but the SMCJ70AHE3_A/I cannot protect AC or floating signals without external polarity control. Layout changes are required to substitute one for the other.
What is the standoff voltage rating of the SMCJ70AHE3_A/I?
The SMCJ70AHE3_A/I has a standoff voltage (VWM) of 70 V, meaning it remains non-conductive under continuous reverse bias up to this level. This rating provides a 10 % margin below its minimum breakdown voltage (77.8 V), ensuring reliable blocking during normal operation while allowing rapid avalanche initiation during overvoltage events. The SMCJ70AHE3_A/I's VWM is validated per ANSI/IEEE C62.35 standards.
Can the SMCJ70AHE3_A/I be used in automated SMT assembly?
Yes, the SMCJ70AHE3_A/I is optimized for automated surface-mount placement: it uses an SMC (DO-214AB) package with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is rated MSL Level 1 (peak reflow ≤260 °C). Its low-profile construction and standardized footprint enable high-yield pick-and-place and reflow processing without special handling or baking requirements - a key feature of the SMCJ70AHE3_A/I design.
SMCJ70AHE3_A/I 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ70AHE3_A/I FAQ
1.How can I place an order for SMCJ70AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70AHE3_A/I 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 SMCJ70AHE3_A/I reliable?
The price and inventory of SMCJ70AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ70AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ70AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70AHE3_A/I?
SMCJ70AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70AHE3_A/I 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 SMCJ70AHE3_A/I?
For technical support, including SMCJ70AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70AHE3_A/I requirements.
6.How does Aetrix verify that SMCJ70AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ70AHE3_A/I 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 SMCJ70AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ70AHE3_A/I?
All SMCJ70AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70AHE3_A/I, 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 SMCJ70AHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ70AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70AHE3_A/I Tags
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