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Vishay General Semiconductor - Diodes Division SMAJ6.5CAHM3_A/I
- Part No.:
- SMAJ6.5CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5CAHM3_A/I.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,444
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Product details
Overview
SMAJ6.5CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping ESD and surge transients on signal/power lines. It features 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA, 400 W peak pulse power (10/1000 μs), and clamps to ≤11.2 V at 35.7 A peak current - deployed in automotive sensor interfaces, industrial I/O protection, and USB/RS-485 line guarding.
For engineers reviewing the SMAJ6.5CAHM3_A/I datasheet, SMAJ6.5CAHM3_A/I pinout, SMAJ6.5CAHM3_A/I application, or SMAJ6.5CAHM3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, and compatibility with 0.2" × 0.2" copper pad layouts per JEDEC standards.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR min/max (7.22–7.98 V) and VC (≤11.2 V) specifications across reverse and forward directions. Its glass-passivated junction ensures stable leakage (<500 μA at VWM) and fast response (<1.0 ns), enabling effective suppression of lightning-induced surges (IEC 61000-4-5) and ESD events (IEC 61000-4-2).
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, supporting continuous operation up to TJ = +150 °C. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification - critical for automotive under-hood and ADAS sensor module deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - maximum continuous reverse voltage before clamping begins; sets operating margin above circuit nominal voltage. |
| VBR (min/max) | 7.22 V / 7.98 V at 10 mA - defines reliable conduction onset window; tight tolerance supports predictable clamping behavior. |
| VC @ IPPM | ≤11.2 V at 35.7 A - peak clamped voltage during 10/1000 μs surge; ensures protected ICs remain below absolute maximum ratings. |
| PPPM | 400 W (10/1000 μs) - surge energy handling capacity; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) testing. |
| ID @ VWM | ≤500 μA - low leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max. | +150 °C - enables use in high-temperature automotive environments without derating. |
| Package | SMA (DO-214AC) - industry-standard SMT footprint; compatible with automated pick-and-place and reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H); cathode band absent per bidirectional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | Accepts surge current during positive transients; connects to protected line (e.g., CAN_H or RS-485 A). |
| Cathode | Transient current entry (negative polarity) | Accepts surge current during negative transients; connects to same protected line as Anode - forms symmetrical clamp path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive environmental compliance mandates and end-of-life recycling requirements without compromising surge robustness. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without baking; eliminates moisture-related popcorning risk during manufacturing. |
| 400 W peak pulse power | Supports repeated surge events in industrial PLC I/O modules without parameter shift or degradation. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure to downstream ICs - critical for 3.3 V and 5 V logic interfaces. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., temperature, pressure) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching ASIC or MCU pins. Use Value: Maintains signal fidelity under 100 V/50 ms load dump events while ensuring <11.2 V clamping at 35.7 A - preserving sensor accuracy and MCU reset immunity. | Use Scenario: Guarding differential RS-485 bus lines (A/B) in factory automation controllers against ESD and ground bounce. IC Role / Device Role / Timing Role: Symmetrical TVS pair (one per line) referenced to common ground, absorbing ±15 kV contact ESD per IEC 61000-4-2. Use Value: Prevents latch-up in isolated RS-485 transceivers by limiting transient voltage to <11.2 V - enabling uninterrupted communication during EMC testing. |
| USB 2.0 Data Line Protection | Power Supply Input Clamp |
Use Scenario: Safeguarding D+/D− lines of embedded USB peripherals against human-body-model ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to USB connector, minimizing signal distortion on 480 Mbps data paths. Use Value: Delivers <11.2 V clamping with sub-500 μA leakage - meeting USB 2.0 eye diagram and jitter requirements while passing ±8 kV IEC 61000-4-2. | Use Scenario: Secondary overvoltage clamp on 12 V DC input rails of industrial gateways after primary fuse and MOV stages. IC Role / Device Role / Timing Role: Fast-acting secondary protector that activates within nanoseconds when upstream protection fails or degrades. Use Value: Limits rail voltage to ≤11.2 V during 400 W surges - preventing damage to downstream DC-DC converters and PMICs rated for 16 V max input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5CAHE3_A/I | RoHS-compliant but not halogen-free; lacks HM3 environmental certification. | Suitable for commercial/industrial use where halogen-free mandate does not apply. | Select when AEC-Q101 is required but halogen-free is optional; identical electrical specs and packaging. |
| SMBJ6.5CAHM3_A/I | Same VWM/VBR/VC specs but in larger SMB (DO-214AA) package; 600 W PPPM rating. | Better thermal dissipation for higher-duty-cycle surge environments; requires larger PCB area. | Choose when system-level surge testing exceeds 400 W or board layout allows SMB footprint. |
Compared with SMAJ6.5CAHE3_A/I, the SMAJ6.5CAHM3_A/I adds halogen-free compliance without sacrificing performance; versus SMBJ6.5CAHM3_A/I, it trades 200 W higher surge rating for 30% smaller board space - optimizing cost and density in space-constrained automotive ECUs.
Availability
SMAJ6.5CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, and USB peripheral designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 traceability.
Supply support for SMAJ6.5CAHM3_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 application-specific optimization.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated at the component level.
FAQ
What does the "HM3" suffix indicate in SMAJ6.5CAHM3_A/I?
The HM3 suffix denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with automotive environmental standards and validates performance under extended temperature cycling, humidity bias, and mechanical shock tests - essential for under-hood and ADAS applications where SMAJ6.5CAHM3_A/I is deployed.
Is SMAJ6.5CAHM3_A/I unidirectional or bidirectional, and how does that affect circuit placement?
SMAJ6.5CAHM3_A/I is bidirectional, meaning it clamps transients of either polarity identically - no cathode marking is present. This allows single-device protection of AC-coupled or differential lines (e.g., CAN, RS-485) without polarity concerns, simplifying layout and eliminating orientation errors during automated assembly of SMAJ6.5CAHM3_A/I.
What is the maximum clamping voltage (VC) of SMAJ6.5CAHM3_A/I, and under what test condition is it specified?
The maximum clamping voltage VC of SMAJ6.5CAHM3_A/I is 11.2 V, measured at 35.7 A peak pulse current using a 10/1000 μs waveform per IEC 61000-4-5. This value ensures protected ICs with 12 V absolute maximum ratings remain safely within operational limits during surge events - a key specification verified in every SMAJ6.5CAHM3_A/I production lot.
Can SMAJ6.5CAHM3_A/I replace SMAJ6.5A in a design originally using a unidirectional TVS?
No - SMAJ6.5CAHM3_A/I is bidirectional while SMAJ6.5A is unidirectional; they differ in polarity marking, leakage behavior, and circuit function. Substituting SMAJ6.5CAHM3_A/I for SMAJ6.5A would eliminate cathode-based DC blocking capability and may compromise protection in DC-biased lines. Always verify schematic topology before interchanging SMAJ6.5CAHM3_A/I with unidirectional variants.
Does SMAJ6.5CAHM3_A/I meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes - SMAJ6.5CAHM3_A/I meets J-STD-020 MSL Level 1 with a maximum peak reflow temperature of 260 °C. This allows direct placement into standard lead-free reflow ovens without pre-baking, reducing manufacturing complexity and cost while maintaining reliability - a verified characteristic of every SMAJ6.5CAHM3_A/I reel shipped from Vishay's qualified facilities.
SMAJ6.5CAHM3_A/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:
- Active
- 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):
- 35.7A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ6.5CAHM3_A/I FAQ
1.How can I place an order for SMAJ6.5CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5CAHM3_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 SMAJ6.5CAHM3_A/I reliable?
The price and inventory of SMAJ6.5CAHM3_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 SMAJ6.5CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ6.5CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5CAHM3_A/I?
SMAJ6.5CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5CAHM3_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 SMAJ6.5CAHM3_A/I?
For technical support, including SMAJ6.5CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5CAHM3_A/I requirements.
6.How does Aetrix verify that SMAJ6.5CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5CAHM3_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 SMAJ6.5CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ6.5CAHM3_A/I?
All SMAJ6.5CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5CAHM3_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 SMAJ6.5CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ6.5CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5CAHM3_A/I Tags
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