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Vishay General Semiconductor - Diodes Division SMCJ70CAHM3_A/I
- Part No.:
- SMCJ70CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70CAHM3_A/I.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,629
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Product details
Overview
SMCJ70CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 1500 W peak pulse power with 113 V clamping voltage at 13.3 A surge current. It features 70 V standoff voltage (VWM), 77.8–86.0 V breakdown range (VBR), and −55 °C to +150 °C operating junction temperature - deployed in automotive sensor signal lines, industrial I/O protection, and telecom interface circuits.
For engineers reviewing the SMCJ70CAHM3_A/I datasheet, SMCJ70CAHM3_A/I pinout, SMCJ70CAHM3_A/I application, or SMCJ70CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with 10/1000 μs surge waveforms in high-reliability embedded systems.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive surge stress.
The device delivers 1500 W peak pulse power dissipation per 10/1000 μs waveform, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), supporting robust thermal performance on standard 8.0 mm × 8.0 mm copper pads. It meets MSL level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 70 V - maximum continuous reverse voltage before clamping initiates; defines safe operating margin below breakdown |
| VBR (Breakdown Voltage) | 77.8–86.0 V at 1 mA - guaranteed conduction onset range; ensures predictable clamping threshold |
| VC (Clamping Voltage) | 113 V at 13.3 A IPPM - peak voltage seen by protected circuit during 10/1000 μs surge; limits stress on downstream ICs |
| PPPM (Peak Pulse Power) | 1500 W - transient energy-handling capacity; supports high-energy ESD and load-dump events |
| ID (Leakage Current) | 1.0 μA max at 70 V - minimal standby power loss and signal integrity impact in high-impedance circuits |
| TJ Range | −55 °C to +150 °C - enables deployment in under-hood automotive, industrial control, and outdoor telecom environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMCJ70CAHM3_A/I uses the SMC (DO-214AB) package: a two-terminal, symmetrical surface-mount case with no polarity marking (bidirectional). Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (symmetrical) | Bidirectional terminal - interchangeable; no polarity dependency in circuit layout |
| Terminal 2 | Anode/Cathode (symmetrical) | Identical to Terminal 1; forms differential or common-mode transient path across protected line |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC JS709E; supports environmentally regulated industrial and automotive BOMs |
| Low incremental surge resistance | Enables tighter clamping voltage control and reduced let-through energy during fast transients |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH; compatible with standard reflow profiles up to 260 °C peak |
| Glass passivated junction | Improves long-term stability of VBR and leakage under thermal and electrical stress |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus signal lines and analog sensor inputs (e.g., pressure, temperature) from ISO 7637-2 load dump and ISO 10605 ESD pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential or single-ended signal pairs upstream of interface ICs. Use Value: Limits transient voltage to ≤113 V during 13.3 A surges, preserving signal integrity and preventing latch-up in automotive-grade microcontrollers. |
Use Scenario: Safeguarding digital input/output channels in programmable logic controllers against inductive switching spikes from solenoids and relays. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side terminals, coordinated with series impedance for current limiting. Use Value: Absorbs 1500 W surge energy without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 Level 4 compliance. |
| Telecom Interface Protection | Consumer Power Adapter EMI Filtering |
|
Use Scenario: Shielding Ethernet PHY interfaces and RS-485 transceivers from lightning-induced surges and AC mains coupling in outdoor base stations. IC Role / Device Role / Timing Role: First-line transient suppressor in multi-stage protection scheme, paired with GDT and π-filter. Use Value: Responds in <1 ps to clamp transients before they reach sensitive PHY ICs, maintaining signal eye diagram integrity. |
Use Scenario: Suppressing fast-rising noise and switching transients on DC output rails of wall adapters and USB PD chargers. IC Role / Device Role / Timing Role: Secondary clamping device after primary MOV/X-cap filtering, targeting residual high-frequency spikes. Use Value: Provides precise 70 V standoff with sub-μA leakage, avoiding quiescent current penalty while meeting UL 497B protector classification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70CAHE3_A/I | Lower PPPM (400 W), same VWM/VBR range, SMA package (smaller footprint, lower thermal mass) | Suitable for space-constrained consumer electronics; not rated for automotive AEC-Q101 | Select when board area is critical and surge energy requirements are ≤400 W |
| SMCJ70CAHE3_A/I | Identical electrical specs and SMC package, but RoHS-compliant without halogen-free certification | Acceptable for commercial/industrial use where halogen-free mandate does not apply | Choose for cost-sensitive non-automotive designs requiring identical form-fit-function |
Compared with SMCJ70CAHM3_A/I, SMAJ70CAHE3_A/I offers reduced surge handling in a smaller package, while SMCJ70CAHE3_A/I provides identical performance without halogen-free compliance - making the HM3 variant essential for automotive and regulated green electronics programs.
Availability
SMCJ70CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom interface boards requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMCJ70CAHM3_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, precision, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure resilience and long-term parametric stability are mandatory.
FAQ
What is the clamping voltage of SMCJ70CAHM3_A/I at its rated peak pulse current?
The SMCJ70CAHM3_A/I has a maximum clamping voltage (VC) of 113 V at 13.3 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ70CAHM3_A/I maintains this clamping performance across its full operating temperature range.
Is SMCJ70CAHM3_A/I qualified for automotive applications?
Yes, SMCJ70CAHM3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88394. It undergoes stress testing for temperature cycling, humidity bias, mechanical shock, and surge endurance required for under-hood and chassis-mounted automotive electronics. The SMCJ70CAHM3_A/I meets these requirements without derating in ambient temperatures up to +125 °C.
How does the bidirectional design of SMCJ70CAHM3_A/I affect PCB layout?
The SMCJ70CAHM3_A/I has no polarity marking and identical electrical behavior in both directions, eliminating orientation constraints during automated placement. Engineers can route it across any differential pair or single-ended line without regard to anode/cathode assignment. This simplifies layout, reduces assembly errors, and supports symmetrical protection schemes - a key advantage over unidirectional TVS diodes like SMCJ70A.
What is the thermal resistance of SMCJ70CAHM3_A/I, and how does it impact heatsinking?
The SMCJ70CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. These values indicate moderate self-heating under sustained power dissipation; however, since the device handles only transient (not continuous) power, heatsinking is generally unnecessary unless exposed to repetitive surges above 1 Hz. The SMCJ70CAHM3_A/I relies on PCB copper mass for thermal inertia rather than external heatsinks.
Does SMCJ70CAHM3_A/I meet UL 497B recognition requirements?
Yes, SMCJ70CAHM3_A/I carries Underwriters Laboratories recognition under UL 497B (QVGQ2) and file number E136766 for both unidirectional and bidirectional configurations. This certification validates its suitability as a protector in telecommunications and data line applications, confirming compliance with surge withstand, flammability (UL 94 V-0), and dielectric strength requirements. The SMCJ70CAHM3_A/I achieves this with its SMC molding compound and glass-passivated chip construction.
SMCJ70CAHM3_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:
- -
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ70CAHM3_A/I FAQ
1.How can I place an order for SMCJ70CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70CAHM3_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 SMCJ70CAHM3_A/I reliable?
The price and inventory of SMCJ70CAHM3_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 SMCJ70CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ70CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70CAHM3_A/I?
SMCJ70CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70CAHM3_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 SMCJ70CAHM3_A/I?
For technical support, including SMCJ70CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70CAHM3_A/I requirements.
6.How does Aetrix verify that SMCJ70CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ70CAHM3_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 SMCJ70CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ70CAHM3_A/I?
All SMCJ70CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70CAHM3_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 SMCJ70CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ70CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70CAHM3_A/I Tags
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