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Vishay General Semiconductor - Diodes Division SMAJ6.5CAHM3_A/H
- Part No.:
- SMAJ6.5CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5CAHM3_A/H.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,517
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Product details
Overview
SMAJ6.5CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and 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 35.7 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), targeting protection of MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ6.5CAHM3_A/H datasheet, SMAJ6.5CAHM3_A/H pinout, SMAJ6.5CAHM3_A/H application, or SMAJ6.5CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, low clamping ratio (VC/VBR ≈ 1.55), MSL Level 1 moisture sensitivity, and halogen-free RoHS compliance per Vishay HM3 suffix.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical avalanche behavior in both polarities, enabling use without polarity awareness on AC-coupled or differential signal paths. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMA package provides thermal resistance of 120 °C/W (junction-to-ambient) and supports automated SMT placement.
The SMAJ6.5CAHM3_A/H delivers 400 W peak pulse power up to 78 V and derates to 300 W above that threshold, with a maximum reverse leakage of 500 μA at VWM and temperature coefficient of VBR at +0.061 %/°C - confirming stable performance across automotive temperature range (−55 °C to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin. |
| VBR min/max | 7.22 V / 7.98 V at 10 mA - Confirmed breakdown threshold range; ensures reliable turn-on during transients. |
| VC @ IPPM | 11.2 V at 35.7 A - Clamped voltage under 10/1000 μs surge; limits downstream device stress to safe levels. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak transient energy absorption capacity; determines survivability against common ESD/lightning surges. |
| ID @ VWM | 500 μA max - Low leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and high-power industrial enclosures. |
| Package | SMA (DO-214AC) - Standardized 2-pin SMT outline with 5.0 mm × 5.0 mm copper pad thermal design requirement. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Case dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; conducts during negative-going surges. |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical junction; conducts during positive-going surges; unmarked on bidirectional units. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Halogen-free & RoHS-compliant (HM3) | Meets IEC 61249-2-21 and JEDEC JS709C; eliminates brominated flame retardants without compromising UL 94 V-0 rating. |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 (4 kV surge) on 2 Ω source impedance when properly laid out. |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interface protection. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow without baking or special handling; reduces manufacturing cost and risk. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching spikes in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector or IC pin to shunt surge energy before it reaches sensitive input stages. Use Value: Maintains signal fidelity below 11.2 V clamping level while surviving repeated 400 W transients - extends lifetime of AEC-Q100 qualified microcontrollers and analog front-ends. |
Use Scenario: Safeguarding differential CAN_H/CAN_L lines against ESD (IEC 61000-4-2 ±8 kV contact) and burst noise (IEC 61000-4-4) in factory automation controllers and motor drives. IC Role / Device Role / Timing Role: Symmetrical TVS pair (one per line) providing common-mode and differential-mode surge suppression without polarity constraints. Use Value: Enables robust communication up to 1 Mbps with <1 ns response time and <500 μA leakage - avoids false triggering or bus lockup during EMC testing. |
| Consumer USB Power/Data Line Protection | Telecom DSL/ADSL Line Interface Protection |
|
Use Scenario: Shielding USB 2.0 VBUS and D+/D− lines from hot-plug transients and nearby ESD events in portable docking stations and charging hubs. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of USB switch or PHY to clamp overshoot before internal ESD diodes activate. Use Value: 6.5 V VWM allows full 5 V USB signaling margin; 11.2 V VC prevents damage to 5 V tolerant I/O cells - validated per USB-IF ESD test plan. |
Use Scenario: Protecting ADSL line drivers and receivers from lightning-induced surges on twisted-pair telephone lines in residential gateways and DSLAM line cards. IC Role / Device Role / Timing Role: Primary protection device mounted at line entry point, coordinated with gas discharge tube (GDT) secondary protection. Use Value: 400 W rating handles induced surges up to 10/700 μs waveform; bidirectional symmetry matches AC-coupled telecom signals - meets ITU-T K.20/K.21 requirements. |
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/H | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Approved for commercial/industrial use only; unsuitable for automotive under-hood deployment. | Select when halogen content and automotive qualification are not required; lower cost alternative for non-automotive designs. |
| SMBJ6.5CAHM3_A/H | Same VWM/VBR/VC ratings; higher 600 W PPPM rating; larger SMB (DO-214AA) package (5.3 mm × 4.1 mm). | Offers greater surge margin for high-energy threats; requires PCB layout change due to larger footprint and thermal pad area. | Choose when system-level surge testing exceeds 400 W requirements or when board space permits larger package for improved thermal margin. |
Compared with SMAJ6.5CAHE3_A/H, the SMAJ6.5CAHM3_A/H adds halogen-free construction and AEC-Q101 validation - essential for Tier-1 automotive supply chains; versus SMBJ6.5CAHM3_A/H, it trades 200 W pulse power headroom for 25 % smaller PCB area and identical assembly process compatibility.
Availability
SMAJ6.5CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN nodes, consumer USB hubs, and telecom line interface cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ6.5CAHM3_A/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, precision, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments - particularly targeting automotive, industrial, and telecom infrastructure where consistent clamping performance and qualification compliance are mandatory.
FAQ
What does the "HM3" suffix indicate in SMAJ6.5CAHM3_A/H?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction meeting JEDEC JS709C and IEC 61249-2-21 standards, with UL 94 V-0 flammability rating. Unlike "E3", HM3 parts eliminate brominated flame retardants while maintaining identical electrical performance and AEC-Q101 qualification - making SMAJ6.5CAHM3_A/H suitable for environmentally regulated automotive and industrial programs.
Is SMAJ6.5CAHM3_A/H suitable for protecting 3.3 V logic interfaces?
Yes, SMAJ6.5CAHM3_A/H is appropriate for 3.3 V logic protection when used with proper layout: its 6.5 V VWM provides adequate margin above 3.3 V rail, and 11.2 V clamping voltage remains within absolute maximum ratings of most 3.3 V I/O cells. For tighter margin applications, verify that downstream ICs tolerate up to 11.2 V transient exposure per their datasheet - SMAJ6.5CAHM3_A/H does not reduce clamping voltage further.
How does the bidirectional nature of SMAJ6.5CAHM3_A/H affect PCB layout?
The bidirectional design of SMAJ6.5CAHM3_A/H eliminates polarity marking and orientation constraints - either terminal may connect to line or ground without functional impact. This simplifies layout, reduces assembly errors, and enables symmetric placement on differential pairs like CAN or RS-485. No cathode band alignment is needed, unlike unidirectional variants such as SMAJ6.5A.
What is the thermal performance limitation of SMAJ6.5CAHM3_A/H in continuous operation?
SMAJ6.5CAHM3_A/H has a maximum power dissipation (PD) of 3.3 W on infinite heatsink at TA = 50 °C, with typical RθJA of 120 °C/W. In standard 0.2" × 0.2" copper pads, continuous DC leakage remains below 500 μA at 6.5 V, generating negligible heat; however, repetitive surge events require thermal design consideration - sustained >1 Hz pulsing may exceed junction temperature limits without adequate copper area or airflow.
Does SMAJ6.5CAHM3_A/H meet any specific automotive qualification standards?
Yes, SMAJ6.5CAHM3_A/H is AEC-Q101 qualified per Vishay's documentation, covering stress tests including HTGB, H3TRB, TCT, and ESD (HBM ≥ 8 kV, CDM ≥ 1 kV). This qualification confirms suitability for automotive applications such as body control modules, ADAS sensor interfaces, and infotainment power rails - provided the full part number including "HM3" and revision "_A/H" is specified per ordering information.
SMAJ6.5CAHM3_A/H 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/H FAQ
1.How can I place an order for SMAJ6.5CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5CAHM3_A/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 SMAJ6.5CAHM3_A/H reliable?
The price and inventory of SMAJ6.5CAHM3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for SMAJ6.5CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5CAHM3_A/H?
SMAJ6.5CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5CAHM3_A/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 SMAJ6.5CAHM3_A/H?
For technical support, including SMAJ6.5CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5CAHM3_A/H requirements.
6.How does Aetrix verify that SMAJ6.5CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5CAHM3_A/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 SMAJ6.5CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ6.5CAHM3_A/H?
All SMAJ6.5CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5CAHM3_A/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 SMAJ6.5CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMAJ6.5CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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