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Vishay General Semiconductor - Diodes Division SMAJ6.5CA-M3/61
- Part No.:
- SMAJ6.5CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5CA-M3/61.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ6.5CA-M3/61 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, 400 W peak pulse power (10/1000 μs), and clamps to ≤11.2 V at 35.7 A peak surge current - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SMAJ6.5CA-M3/61 datasheet, SMAJ6.5CA-M3/61 pinout, SMAJ6.5CA-M3/61 application, or SMAJ6.5CA-M3/61 equivalent, key selection criteria include bidirectional clamping capability, 11.2 V max clamping voltage at rated IPPM, M3 halogen-free RoHS compliance, AEC-Q101 qualification eligibility, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS diode operates symmetrically in both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 μs transients at 0.01% duty cycle.
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The device meets MSL Level 1 per J-STD-020 and is rated for 40 A non-repetitive forward surge (IFSM) in unidirectional mode - though SMAJ6.5CA-M3/61 itself is bidirectional and has no polarity marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - maximum continuous reverse stand-off voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR min/max | 7.22 V / 7.98 V at 10 mA - guaranteed breakdown range ensuring consistent turn-on across production lots |
| VC @ IPPM | ≤11.2 V at 35.7 A - clamping voltage during 10/1000 μs surge; determines protected circuit's maximum transient exposure |
| PPPM | 400 W - peak pulse power handling with standard 10/1000 μs waveform; derates above 78 V to 300 W |
| ID @ VWM | ≤500 μA - maximum reverse leakage at 6.5 V; ensures minimal standby power loss in high-impedance circuits |
| Package | SMA (DO-214AC) - surface-mount outline with 0.208" × 0.157" footprint; compatible with JEDEC-standard reflow profiles |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix); UL 94 V-0 molding compound; JESD201 Class 2 whisker resistance |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), cathode band omitted for bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either polarity) | One terminal of symmetrical PN junction; accepts surge current regardless of voltage polarity |
| Cathode | Transient current exit (either polarity) | Second terminal of symmetrical PN junction; completes low-impedance path during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates polarity concerns during board layout and ESD protection of AC-coupled or differential lines |
| 400 W peak pulse rating | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) when mounted on 5 mm × 5 mm copper pads - validated per fig. 1 and fig. 2 |
| Glass passivated junction | Ensures stable leakage and breakdown over temperature and lifetime; supports 150 °C max junction temperature operation |
| MSL Level 1 rating | Allows unlimited floor life and single reflow without baking - compatible with standard SMT assembly processes up to 260 °C peak |
| AEC-Q101 qualification path | M3 suffix devices support automotive qualification via HE3/HM3 variants - same die and construction, differing only in test screening and traceability |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to 35 V, 100 ms) on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Primary clamping element placed between power rail and ground, responding within <1 ns to limit voltage seen by downstream regulators and microcontrollers. Use Value: Clamps 35.7 A surge to ≤11.2 V, preventing latch-up or permanent damage to 5 V/3.3 V logic interfaces powered from the same rail. | Use Scenario: Protecting analog output pins (e.g., 4–20 mA current loop drivers) and digital I/O (CAN, LIN) from ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional shunt device across signal pair or signal-to-ground, absorbing ±8 kV contact ESD per IEC 61000-4-2 without affecting DC bias. Use Value: Maintains ≤500 μA leakage at 6.5 V, preserving accuracy of precision current sources while enabling fast transient diversion. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Safeguarding USB 2.0 D+/D− lines against human-body-model (HBM) ESD events in portable chargers and docking stations. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector, minimizing stub length to preserve signal integrity up to 480 Mbps. Use Value: Junction capacitance <100 pF (typ.) at VWM ensures <0.1 dB insertion loss at 240 MHz - critical for maintaining eye diagram compliance. | Use Scenario: Front-end protection of ADSL/VDSL line interface ICs against lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: First-stage coarse clamp in multi-stage protection network, diverting >100 A surges before gas discharge tube or polymer PTC. Use Value: Withstands 400 W pulses without degradation, enabling robust front-end design meeting ITU-T K.20/K.21 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5CA-E3/61 | Same electrical specs and package; RoHS-compliant but not halogen-free (E3 vs M3) | Commercial-grade use where halogen-free requirement is absent; identical thermal and surge performance | Select E3 for cost-sensitive non-automotive designs requiring RoHS only |
| SMAJ6.5CAHM3_A/H | Same die and construction; AEC-Q101 qualified with enhanced traceability and screening (HM3 suffix) | Automotive applications requiring PPAP documentation and zero-defect reliability; same PCB footprint | Choose HM3 variant for Tier-1 automotive supply chains needing full qualification evidence |
Compared with SMAJ6.5CA-M3/61, the E3 version offers identical protection performance without halogen-free assurance, while the HM3 variant adds automotive qualification rigor - all three share the same SMA package, pinout, and clamping behavior, enabling direct substitution based on compliance tier.
Availability
SMAJ6.5CA-M3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, consumer USB protection, and telecom line surge suppression requiring stable component supply and halogen-free compliance.
Supply support for SMAJ6.5CA-M3/61 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, TVS devices, and optoelectronics 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 communications systems where fast-response, high-power clamping and long-term stability are critical.
FAQ
What does the "CA" suffix indicate in SMAJ6.5CA-M3/61?
The "CA" suffix denotes a bidirectional configuration: SMAJ6.5CA-M3/61 provides symmetrical clamping in both voltage polarities, with identical breakdown (7.22–7.98 V), clamping (≤11.2 V), and surge current (35.7 A) characteristics in either direction - unlike unidirectional "A" variants that require correct cathode orientation. This makes SMAJ6.5CA-M3/61 ideal for AC signal lines or differential buses where polarity is undefined.
Is SMAJ6.5CA-M3/61 qualified for automotive applications?
SMAJ6.5CA-M3/61 itself is commercial-grade and halogen-free (M3), but not AEC-Q101 qualified. However, Vishay offers functionally identical variants - SMAJ6.5CAHM3_A/H - which use the same die and package but undergo additional automotive stress testing and traceability controls. For production automotive use, specify the HM3 suffix; SMAJ6.5CA-M3/61 remains suitable for non-qualified automotive subsystems or prototyping.
What is the maximum clamping voltage of SMAJ6.5CA-M3/61 under surge conditions?
The maximum clamping voltage (VC) of SMAJ6.5CA-M3/61 is 11.2 V, measured at its rated peak pulse current (IPPM) of 35.7 A using the standard 10/1000 μs double-exponential waveform. This value is guaranteed across temperature and production lot - meaning any SMAJ6.5CA-M3/61 will clamp a 35.7 A transient to no more than 11.2 V, protecting downstream 5 V or 3.3 V logic from overvoltage damage.
How does the M3 suffix differ from E3 in SMAJ6.5CA-M3/61?
The M3 suffix indicates halogen-free, RoHS-compliant construction with UL 94 V-0 molding compound and JESD201 Class 2 whisker resistance - meeting stricter environmental mandates than the E3 suffix, which is RoHS-compliant but contains halogens. Electrically and thermally, SMAJ6.5CA-M3/61 and SMAJ6.5CA-E3/61 are identical; the M3 version is selected when halogen-free compliance is contractually required, such as in EU medical or green-energy projects.
Can SMAJ6.5CA-M3/61 be used in place of a unidirectional TVS like SMAJ6.5A-M3/61?
No - SMAJ6.5CA-M3/61 is bidirectional and lacks polarity marking, while SMAJ6.5A-M3/61 is unidirectional with a cathode band. Substituting them requires verifying circuit topology: SMAJ6.5CA-M3/61 works on AC or floating lines but cannot replace a unidirectional device in DC-biased applications where forward conduction must be blocked. Reverse leakage (500 μA vs 800 μA for SMAJ6.5A) and clamping symmetry also differ - always validate with actual surge waveforms and system grounding.
SMAJ6.5CA-M3/61 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ6.5CA-M3/61 FAQ
1.How can I place an order for SMAJ6.5CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5CA-M3/61 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 SMAJ6.5CA-M3/61 reliable?
The price and inventory of SMAJ6.5CA-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.5CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ6.5CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5CA-M3/61?
SMAJ6.5CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5CA-M3/61 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 SMAJ6.5CA-M3/61?
For technical support, including SMAJ6.5CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5CA-M3/61 requirements.
6.How does Aetrix verify that SMAJ6.5CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5CA-M3/61 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 SMAJ6.5CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ6.5CA-M3/61?
All SMAJ6.5CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5CA-M3/61, 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 SMAJ6.5CA-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ6.5CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5CA-M3/61 Tags
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