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Vishay General Semiconductor - Diodes Division SMBJ6.5CAHM3/I
- Part No.:
- SMBJ6.5CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ6.5CAHM3/I.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,162
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Product details
Overview
SMBJ6.5CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA, 11.2 V maximum clamping voltage (VC) at 53.6 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ6.5CAHM3/I datasheet, SMBJ6.5CAHM3/I pinout, SMBJ6.5CAHM3/I application, or SMBJ6.5CAHM3/I equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, AEC-Q101-qualified halogen-free construction, thermal resistance (RθJA = 100 °C/W), and real-world protection use cases - all confirmed from Vishay's official SMBJ5.0A–SMBJ188A specification document (Rev. 09-Jan-2024, Doc. #88392).
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (7.22–7.98 V), VC (11.2 V), and IPPM (53.6 A) in either direction. Its glass-passivated junction ensures stable avalanche performance, while low incremental surge resistance enables precise clamping under fast transients like ESD or inductive switching spikes.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and exhibits a VBR temperature coefficient of +0.061 %/°C - critical for thermal stability in automotive and industrial environments where ambient drift affects clamping accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (min/max) | 7.22 V / 7.98 V at 10 mA - guaranteed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 11.2 V at 53.6 A - clamped voltage during 10/1000 µs surge; limits downstream component stress to safe levels. |
| PPPM | 600 W - peak pulse power handling capability; supports robust protection against lightning-induced surges and load dump. |
| ID @ VWM | 500 µA max - low leakage at stand-off voltage; minimizes standby power loss and avoids false triggering. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance; informs heatsinking requirements for sustained surge duty cycles. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive or high-temperature industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical bidirectional avalanche behavior - either terminal serves as input or return; no directional routing required. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients without degradation - suitable for IEC 61000-4-5 level 4 surge immunity compliance. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive electronics reliability - supports deployment in ADAS sensors, body control modules, and infotainment power rails. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance mandates for global OEM supply chains without compromising surge robustness. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking - reduces manufacturing overhead and prevents popcorning defects. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during clamping - protects 3.3 V and 5 V logic interfaces with tight voltage margins. |
Applications
| Industrial Motor Control | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Protecting gate drivers and feedback signal lines from inductive kickback during PWM switching of 24 V DC motors. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across motor driver output or encoder signal pair to absorb flyback energy. Use Value: Limits transient voltage to ≤11.2 V, preventing latch-up or oxide breakdown in 3.3 V microcontrollers interfacing with Hall-effect sensors. |
Use Scenario: Safeguarding LIN bus transceivers and pressure sensor analog outputs in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary line-level TVS on bidirectional data and supply pins of automotive-grade sensor ASICs. Use Value: Withstands repetitive 600 W surges and operates up to +150 °C - maintains protection integrity during extended high-temp engine operation. |
| Telecom Power Input | Consumer USB-C Port Protection |
|
Use Scenario: Guarding 12 V/48 V DC input rails of PoE-powered network switches against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage transient suppressor upstream of DC-DC converters and hot-swap controllers. Use Value: Clamps 10/1000 µs surges to 11.2 V within nanoseconds - prevents damage to downstream PMICs and Ethernet PHYs. |
Use Scenario: Protecting VBUS and CC lines in portable devices against ESD (IEC 61000-4-2 ±15 kV) and accidental 20 V adapter misconnection. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bidirectional clamp integrated into USB-C connector subcircuit. Use Value: 6.5 V VWM allows compatibility with 5 V USB PD negotiation while clamping 20 V faults to safe levels without disrupting communication. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.5CAHE3/I | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial-grade industrial or computing applications without automotive reliability requirements. | Select when halogen-free content or automotive qualification is not mandated - lower cost alternative with identical electrical specs. |
| SMAJ6.5CAHM3 | Same VWM/VBR/VC ratings but in smaller SMA (DO-214AC) package; lower PPPM (400 W) and higher RθJA (140 °C/W). | Limited to lower-energy transients and space-constrained PCBs where thermal derating is acceptable. | Choose only if board area is critical and surge threat level is ≤400 W - not a drop-in replacement due to reduced power rating and thermal performance. |
Compared with SMBJ6.5CAHM3/I, the HE3 variant trades halogen-free and AEC-Q101 compliance for cost, while the SMAJ6.5CAHM3 sacrifices 33 % peak power handling and thermal efficiency for footprint reduction - making SMBJ6.5CAHM3/I the optimal choice for high-reliability, high-energy protection where both automotive qualification and 600 W capability are required.
Availability
SMBJ6.5CAHM3/I is available at Aetrix Electronics and suitable for industrial motor control, automotive sensor interface, telecom power input, and consumer USB-C port protection requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMBJ6.5CAHM3/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, and protection devices with emphasis on reliability, power efficiency, and application-specific validation.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where consistent clamping performance and AEC-Q101 compliance are mandatory.
FAQ
What does the "HM3" suffix indicate for SMBJ6.5CAHM3/I?
The HM3 suffix denotes that SMBJ6.5CAHM3/I is halogen-free, RoHS-compliant, and AEC-Q101 qualified - meeting automotive-grade reliability standards and environmental regulations. This distinguishes it from E3 (RoHS only) and HE3 (RoHS + AEC-Q101, but not halogen-free) variants. The "I" indicates 13-inch tape-and-reel packaging (3200 units per reel). All HM3 devices undergo rigorous stress testing per AEC-Q101.
Is SMBJ6.5CAHM3/I unidirectional or bidirectional, and how does that affect circuit layout?
SMBJ6.5CAHM3/I is a bidirectional TVS diode, meaning it clamps voltage transients equally in both polarities - no cathode band marking is present, and PCB layout requires no polarity alignment. This simplifies design for AC-coupled lines, differential buses (e.g., RS-485, LIN), or any application where voltage reversals occur. Unlike unidirectional SMBJ6.5A, SMBJ6.5CAHM3/I provides symmetrical protection without external series diodes.
What is the maximum clamping voltage (VC) of SMBJ6.5CAHM3/I, and under what test condition is it specified?
The maximum clamping voltage (VC) of SMBJ6.5CAHM3/I is 11.2 V, measured at a peak pulse current (IPPM) of 53.6 A using the standardized 10/1000 µs double-exponential surge waveform. This value represents the worst-case voltage seen by protected circuitry during a full-power transient event and is guaranteed across the operating temperature range (-55 °C to +150 °C), ensuring consistent protection margin for 3.3 V and 5 V ICs.
Can SMBJ6.5CAHM3/I replace SMBJ6.5A in an existing design?
No - SMBJ6.5CAHM3/I cannot directly replace unidirectional SMBJ6.5A without circuit review. While both share identical VWM (6.5 V), VBR, and VC ratings, SMBJ6.5CAHM3/I is bidirectional and lacks polarity marking, whereas SMBJ6.5A is unidirectional with a cathode band. Substituting it on a DC-biased line may cause unintended conduction; verify signal polarity and transient directionality before replacement. For bidirectional use cases, SMBJ6.5CAHM3/I is the correct selection.
What is the thermal resistance (RθJA) of SMBJ6.5CAHM3/I, and how does it impact PCB layout?
SMBJ6.5CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal. This value assumes minimal copper area - increasing pad size or adding internal ground/power planes lowers effective RθJA, improving surge endurance. For repeated surge events, ensure adequate copper pour and avoid narrow traces to prevent localized heating that could degrade clamping consistency in SMBJ6.5CAHM3/I.
SMBJ6.5CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 53.6A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
SMBJ6.5CAHM3/I FAQ
1.How can I place an order for SMBJ6.5CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ6.5CAHM3/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 SMBJ6.5CAHM3/I reliable?
The price and inventory of SMBJ6.5CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ6.5CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ6.5CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ6.5CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ6.5CAHM3/I?
SMBJ6.5CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ6.5CAHM3/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 SMBJ6.5CAHM3/I?
For technical support, including SMBJ6.5CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ6.5CAHM3/I requirements.
6.How does Aetrix verify that SMBJ6.5CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ6.5CAHM3/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 SMBJ6.5CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ6.5CAHM3/I?
All SMBJ6.5CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ6.5CAHM3/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 SMBJ6.5CAHM3/I part is unused and in its original packaging.
Return procedure for SMBJ6.5CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ6.5CAHM3/I Tags
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Diodes Incorporated
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