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Vishay General Semiconductor - Diodes Division SMCJ6.5AHM3/H
- Part No.:
- SMCJ6.5AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ6.5AHM3/H.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,652
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Product details
Overview
SMCJ6.5AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA, 1500 W peak pulse power (10/1000 µs), and clamps transients to ≤11.2 V at 133.9 A IPPM. It is halogen-free, RoHS-compliant, and qualified to AEC-Q101 for automotive-grade reliability.
For engineers reviewing the SMCJ6.5AHM3/H datasheet, SMCJ6.5AHM3/H pinout, SMCJ6.5AHM3/H application, or SMCJ6.5AHM3/H equivalent, key selection criteria include its 11.2 V clamping voltage under 133.9 A surge, 1500 W transient handling capability, unidirectional polarity with cathode band marking, and suitability for automotive sensor line and power rail protection where low-leakage (<500 µA at VWM) and fast response are critical.
Technical Context
This TVS diode operates as a clamping device in reverse-biased configuration, activating when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance, enabling precise, repeatable clamping performance across temperature (–55 °C to +150 °C).
The SMCJ6.5AHM3/H delivers 1500 W peak pulse power per 10/1000 µs waveform on standard 8.0 mm × 8.0 mm copper pads, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W. Its MSL Level 1 rating supports lead-free reflow up to 260 °C peak, and matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 5 V–6 V supply rails. |
| VBR min/max | 7.22 V / 7.98 V at 10 mA - Tight breakdown window ensures predictable turn-on and minimal variation across production lots. |
| VC @ IPPM | ≤11.2 V at 133.9 A - Clamping voltage limits downstream IC stress during 1500 W transients, protecting 3.3 V/5 V logic interfaces. |
| PPPM | 1500 W - Handles high-energy surges from inductive switching or ESD events without degradation. |
| ID @ VWM | ≤500 µA - Low leakage preserves signal integrity and battery life in always-on automotive modules. |
| Package | SMC (DO-214AB) - Industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units, ADAS sensors, and infotainment power inputs. |
Pinout & Package
SMCJ6.5AHM3/H uses the SMC (DO-214AB) package: a 2-terminal, surface-mount, molded plastic case with matte tin-plated leads. Polarity is marked by a cathode band on the body; the banded end is the cathode (K), and the opposite end is the anode (A). The device is unidirectional and must be oriented correctly in series with the protected line.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected line connection point | Connected to the circuit node requiring overvoltage clamping; reverse-biased during normal operation. |
| Anode | Ground or return path | Tied to system ground or low-impedance reference plane to complete clamping current path during surge events. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with environmental regulations and automotive material requirements (e.g., ELV, REACH). |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock testing per AEC standard. |
| Low incremental surge resistance | Enables tighter VC/VBR ratio (11.2 V / 7.22 V ≈ 1.55), minimizing voltage overshoot during fast transients. |
| Glass passivated junction | Improves long-term stability of VBR and leakage current under thermal stress and humidity exposure. |
| MSL Level 1 | Supports standard lead-free reflow profiles without preconditioning, reducing manufacturing complexity. |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamp |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between signal line and chassis ground to shunt surge energy away from IC pins. Use Value: Limits transient voltage to ≤11.2 V, preventing latch-up or gate oxide damage in 5 V tolerant transceivers while maintaining <500 µA standby leakage. | Use Scenario: Safeguarding 5 V or 6 V microcontroller power inputs against inductive kickback from relay coils or motor drivers. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VDD rail, activated within picoseconds to suppress spikes exceeding 6.5 V. Use Value: Absorbs 1500 W surges without failure, preserving MCU functionality and eliminating need for redundant filtering stages. |
| Consumer USB Port Protection | Telecom Line Interface Clamp |
Use Scenario: Shielding USB 2.0 data lines and VBUS from ESD (±15 kV contact) and hot-swap transients in portable docking stations. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional part used on VBUS only, with cathode to VBUS and anode to ground. Use Value: Clamps VBUS to ≤11.2 V during 133.9 A surge, meeting IEC 61000-4-2 Level 4 while adding <0.5 pF parasitic capacitance. | Use Scenario: Front-end protection for Ethernet PHYs or RS-485 transceivers exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage transient suppressor on DC bias lines feeding isolated interface ICs, placed before common-mode chokes. Use Value: Withstands repeated 10/1000 µs surges up to 1500 W, extending system MTBF in harsh telecom environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5AHE3/A | Lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W), same VWM/VBR range. | Suitable for space-constrained consumer PCBs with lower surge risk; not rated for automotive underhood temperatures. | Select when board area is limited and surge energy rarely exceeds 400 W. |
| SMCJ6.5A-M3/57T | Same electrical specs and SMC package, but commercial-grade (non-AEC-Q101), M3 suffix only (halogen-free/RoHS), no automotive qualification. | Applicable in industrial controls or white goods where AEC-Q101 is not mandated; lower cost and broader availability. | Choose for non-automotive applications requiring identical clamping performance without automotive validation overhead. |
Compared with SMCJ6.5AHM3/H, SMAJ6.5AHE3/A offers smaller size but reduced surge capacity and thermal robustness, while SMCJ6.5A-M3/57T matches all key electrical parameters but lacks AEC-Q101 certification-making it suitable for cost-sensitive industrial designs where automotive reliability is not required.
Availability
SMCJ6.5AHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power rail clamping, and telecom line interface applications requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for SMCJ6.5AHM3/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in demanding environments-including automotive, industrial, and telecom-where consistent clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of the SMCJ6.5AHM3/H under full-rated surge current?
The SMCJ6.5AHM3/H has a maximum clamping voltage (VC) of 11.2 V when subjected to its peak pulse current (IPPM) of 133.9 A, measured using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and ensures downstream components see no more than 11.2 V during worst-case transients. The SMCJ6.5AHM3/H achieves this with low incremental surge resistance, making it especially effective for protecting 5 V logic rails and automotive sensor interfaces.
Is the SMCJ6.5AHM3/H suitable for automotive applications?
Yes, the SMCJ6.5AHM3/H is explicitly AEC-Q101 qualified, as confirmed by its HM3 suffix and Vishay documentation. It undergoes rigorous stress testing-including temperature cycling, high-temperature operating life, and mechanical shock-to ensure reliability in automotive under-hood and cabin environments. The SMCJ6.5AHM3/H is commonly deployed in engine control modules, ADAS camera power supplies, and body control unit sensor interfaces where sustained operation from –55 °C to +150 °C and immunity to load dump pulses are required.
How does the SMCJ6.5AHM3/H differ from the commercial-grade SMCJ6.5A-M3/57T?
The SMCJ6.5AHM3/H and SMCJ6.5A-M3/57T share identical electrical specifications-including VWM (6.5 V), VBR (7.22–7.98 V), VC (≤11.2 V), and PPPM (1500 W)-and both use the SMC (DO-214AB) package with halogen-free, RoHS-compliant construction. The key distinction is that the SMCJ6.5AHM3/H carries AEC-Q101 qualification (denoted by "H" in the suffix), while SMCJ6.5A-M3/57T is commercial grade only. This makes the SMCJ6.5AHM3/H appropriate for automotive safety-critical systems, whereas the M3 version suits industrial or consumer applications where automotive validation is unnecessary.
What is the thermal resistance and how does it affect PCB layout for the SMCJ6.5AHM3/H?
The SMCJ6.5AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain reliability under repeated surge conditions, PCB layout must provide adequate copper area-minimum 8 mm² per pad-and avoid narrow traces that increase thermal impedance. The SMCJ6.5AHM3/H's low RθJL enables efficient heat transfer to the PCB ground plane, supporting sustained operation at TJ up to +150 °C in compact automotive modules.
Can the SMCJ6.5AHM3/H be used in bidirectional configurations?
No, the SMCJ6.5AHM3/H is a unidirectional TVS diode, indicated by the "A" (not "CA") suffix and presence of a cathode band marking. It conducts only in reverse bias above VBR and blocks forward current like a standard diode. For bidirectional protection-such as AC signal lines or differential buses-Vishay offers the SMCJ6.5CA series, which has symmetrical breakdown in both directions and no polarity marking. Using the SMCJ6.5AHM3/H in a bidirectional role would result in unintended forward conduction and potential failure; always verify polarity alignment during placement.
SMCJ6.5AHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 133.9A
- 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)
SMCJ6.5AHM3/H FAQ
1.How can I place an order for SMCJ6.5AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ6.5AHM3/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 SMCJ6.5AHM3/H reliable?
The price and inventory of SMCJ6.5AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ6.5AHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ6.5AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ6.5AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ6.5AHM3/H?
SMCJ6.5AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ6.5AHM3/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 SMCJ6.5AHM3/H?
For technical support, including SMCJ6.5AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ6.5AHM3/H requirements.
6.How does Aetrix verify that SMCJ6.5AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ6.5AHM3/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 SMCJ6.5AHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ6.5AHM3/H?
All SMCJ6.5AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ6.5AHM3/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 SMCJ6.5AHM3/H part is unused and in its original packaging.
Return procedure for SMCJ6.5AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ6.5AHM3/H Tags
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