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Vishay General Semiconductor - Diodes Division SMA5J7.0CAHM3/I
- Part No.:
- SMA5J7.0CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J7.0CAHM3/I.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,493
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Product details
Overview
SMA5J7.0CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection on signal and power lines. It features a 7.0 V stand-off voltage (VWM), 12.0 V maximum clamping voltage (VC) at 41.7 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J7.0CAHM3/I datasheet, SMA5J7.0CAHM3/I pinout, SMA5J7.0CAHM3/I application, or SMA5J7.0CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and thermal resistance (RθJA = 80 °C/W) under PCB pad-limited dissipation.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism with symmetrical bidirectional conduction. Its glass-passivated junction ensures stable VBR (min 7.78 V, max 8.60 V at 10 mA) and low incremental surge resistance, enabling consistent clamping across repeated 10/1000 μs surges up to 500 W.
Designed for surface-mount automation, it meets MSL Level 1 (260 °C reflow peak) and supports operation from −55 °C to +150 °C junction temperature. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification - critical for automotive-grade reliability in engine control units and ADAS sensor lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - reverse stand-off voltage; defines maximum continuous operating voltage before significant leakage begins. |
| VBR (min/max) | 7.78 V / 8.60 V at 10 mA - guaranteed avalanche breakdown range; ensures predictable turn-on during transients. |
| VC @ IPPM | 12.0 V at 41.7 A - clamping voltage under 10/1000 μs surge; limits protected circuit voltage stress. |
| PPPM | 500 W - peak pulse power handling; determines survivability against lightning or ESD-induced surges. |
| ID @ VWM | < 1000 μA - reverse leakage at stand-off; low enough to avoid interference in high-impedance sensor lines. |
| TJ max. | +150 °C - maximum junction temperature; enables use in under-hood automotive environments. |
| RθJA | 80 °C/W - thermal resistance junction-to-ambient on standard 5 mm × 5 mm copper pads; guides heatsinking requirements. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient path | Either terminal serves as input/output; clamps positive and negative transients equally without orientation dependency. |
| Case (body) | Thermal and mechanical interface | Plastic-molded body with UL 94 V-0 rating; transfers heat to PCB copper pads via soldered leads. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including powertrain and chassis systems per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets JEDEC JESD201 Class 2 whisker resistance and environmental compliance for global production. |
| Low profile SMA package | Height ≤ 2.29 mm; compatible with automated pick-and-place and compact board layouts in space-constrained modules. |
| Fast response time & low Rsurge | Sub-nanosecond response; minimal voltage overshoot due to low dynamic impedance during surge events. |
| MSL Level 1 moisture sensitivity | Unlimited floor life at ≤30 °C/60% RH; eliminates bake requirements prior to reflow assembly. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching sensitive analog front-ends. Use Value: Clamps 12 V system transients to ≤12.0 V while surviving 500 W surges - preserving signal integrity and preventing latch-up in 3.3 V/5 V receivers. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to relay coil flyback and motor drive noise in factory automation. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input lines to absorb repetitive switching transients without degradation. Use Value: Withstands ≥1000 surges at rated IPPM and maintains <1000 μA leakage at 7.0 V - ensuring long-term reliability in unattended industrial deployments. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Transient suppression on Ethernet PHY power rails and auxiliary bias lines in PoE-powered switches and base stations. IC Role / Device Role / Timing Role: Secondary-level protection downstream of primary GDT/MOV stages, handling fast-rising ESD and surge residuals. Use Value: 12.0 V clamping enables compatibility with 9–12 V bias supplies while providing sub-1 ns response - critical for protecting gigabit PHY ICs. |
Use Scenario: Input-stage surge protection in AC/DC adapters for smart home devices subjected to mains-borne transients per IEC 61000-4-5. IC Role / Device Role / Timing Role: First-line TVS on DC output side (e.g., 5 V/9 V rails) to prevent overvoltage damage during adapter fault conditions. Use Value: 500 W PPPM rating and 80 °C/W RθJA allow sustained operation on standard FR-4 with 5 mm² copper - eliminating need for external heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J7.0CAHE3/I | Same electrical specs, but RoHS-compliant without halogen-free certification; lacks JESD201 Class 2 whisker resistance. | Approved for commercial/industrial use; not qualified for automotive under hood or high-reliability AEC-Q101 programs. | Select when halogen-free requirement is waived and cost optimization is prioritized over automotive qualification. |
| SMCJ7.0CAHM3 | Higher PPPM (1500 W), larger SMC (DO-214AB) package; identical VWM, VBR, VC, and AEC-Q101/HM3 status. | Used where higher surge margin is needed (e.g., main power rail protection); requires larger PCB footprint and different pad layout. | Choose when system-level surge testing exceeds 500 W or when design allows SMC package size increase for enhanced ruggedness. |
Compared with SMA5J7.0CAHM3/I, SMA5J7.0CAHE3/I omits halogen-free and whisker-resistance validation, limiting automotive deployment, while SMCJ7.0CAHM3 trades compactness for 3× surge capacity - making SMA5J7.0CAHM3/I optimal for space-constrained AEC-Q101 applications needing exact 500 W rating.
Availability
SMA5J7.0CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification.
Supply support for SMA5J7.0CAHM3/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 and application-specific performance.
The SMA5J series delivers high-power-density TVS diodes optimized for automotive, industrial, and telecom surge protection - engineered to meet stringent AEC-Q101, RoHS, and MSL requirements in compact surface-mount formats.
FAQ
What does the "HM3" suffix indicate for SMA5J7.0CAHM3/I?
The HM3 suffix on SMA5J7.0CAHM3/I denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance and full AEC-Q101 qualification. This makes SMA5J7.0CAHM3/I suitable for automotive under-hood applications where material compliance and long-term reliability under thermal cycling are mandatory.
Is SMA5J7.0CAHM3/I unidirectional or bidirectional?
SMA5J7.0CAHM3/I is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number. It provides symmetrical clamping for both positive and negative transients without polarity sensitivity - ideal for AC-coupled lines, differential buses like CAN, and floating sensor inputs.
What is the maximum clamping voltage of SMA5J7.0CAHM3/I and under what test condition?
The maximum clamping voltage of SMA5J7.0CAHM3/I is 12.0 V, measured at 41.7 A peak pulse current (IPPM) using the standardized 10/1000 μs double-exponential surge waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during surge events.
Does SMA5J7.0CAHM3/I require a specific PCB pad layout for thermal performance?
Yes - the 80 °C/W junction-to-ambient thermal resistance (RθJA) for SMA5J7.0CAHM3/I is specified with mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Deviating from this layout increases thermal resistance and reduces safe surge repetition rate; recommended land pattern matches DO-214AC IPC-7351B standard.
How does SMA5J7.0CAHM3/I differ from SMA5J7.0A (unidirectional) variants?
SMA5J7.0CAHM3/I differs from unidirectional SMA5J7.0AHM3/I in polarity behavior: it clamps symmetrically in both directions, has no cathode band marking, and exhibits identical VBR/VWM in forward and reverse bias. Unidirectional versions conduct only in reverse breakdown and require correct orientation - making SMA5J7.0CAHM3/I preferable for AC or floating signal paths.
SMA5J7.0CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 41.7A
- Power - Peak Pulse:
- 500W
- 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-214AC (SMA)
SMA5J7.0CAHM3/I FAQ
1.How can I place an order for SMA5J7.0CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J7.0CAHM3/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 SMA5J7.0CAHM3/I reliable?
The price and inventory of SMA5J7.0CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J7.0CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMA5J7.0CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J7.0CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J7.0CAHM3/I?
SMA5J7.0CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J7.0CAHM3/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 SMA5J7.0CAHM3/I?
For technical support, including SMA5J7.0CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J7.0CAHM3/I requirements.
6.How does Aetrix verify that SMA5J7.0CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMA5J7.0CAHM3/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 SMA5J7.0CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMA5J7.0CAHM3/I?
All SMA5J7.0CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J7.0CAHM3/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 SMA5J7.0CAHM3/I part is unused and in its original packaging.
Return procedure for SMA5J7.0CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J7.0CAHM3/I Tags
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Diodes Incorporated
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