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Vishay General Semiconductor - Diodes Division SMAJ6.5CAHM3/I
- Part No.:
- SMAJ6.5CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5CAHM3/I.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,164
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Product details
Overview
SMAJ6.5CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) 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 35.7 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform). It is used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial electronics against ESD and inductive switching surges.
For engineers reviewing the SMAJ6.5CAHM3/I datasheet, SMAJ6.5CAHM3/I pinout, SMAJ6.5CAHM3/I application, or SMAJ6.5CAHM3/I equivalent, this device delivers verified bidirectional clamping performance with AEC-Q101 qualification, halogen-free RoHS compliance, and MSL Level 1 moisture sensitivity - critical for automotive-grade board-level surge protection design and long-term reliability validation.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional CA construction, enabling suppression of positive and negative transients without polarity dependency. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<500 μA at VWM), while the low incremental surge resistance supports fast clamping response under 1 ns.
The device is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient per Fig. 2; thermal resistance is 120 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. It meets UL 497B recognition (QVGQ2) and complies with ANSI/IEEE C62.35 surge standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR (min/max) | 7.22 V / 7.98 V at 10 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM | 11.2 V at 35.7 A - Clamped voltage seen by protected circuit during 10/1000 μs surge; limits stress on downstream components. |
| PPPM | 400 W (10/1000 μs) - Peak transient energy absorption capacity; sufficient for ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3. |
| ID @ VWM | <500 μA - Low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance interfaces. |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without thermal derating penalties. |
| Package | SMA (DO-214AC) - Surface-mount footprint compatible with automated assembly; 0.208" × 0.157" body with matte tin-plated leads. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Case outline conforms to JEDEC DO-214AC standard; terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients; symmetrical conduction enables dual-polarity clamping. |
| Cathode | Transient return path (bidirectional) | Functions identically to Anode in CA devices; no band marking confirms bidirectional symmetry and eliminates orientation errors during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and enables use in green manufacturing without compromising surge robustness. |
| 400 W peak pulse power (10/1000 μs) | Supports repeated surge events in industrial motor drives and telecom power supplies without parameter drift. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without moisture-induced popcorn failure or delamination. |
| UL 497B recognized (QVGQ2) | Confirms suitability for primary-side telecom and data line protection where regulatory certification is mandatory. |
Applications
| Automotive Sensor Signal Protection | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Limits transient voltage to ≤11.2 V, preventing latch-up or gate oxide damage in 5 V-tolerant transceivers and ADC front-ends. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminals to shunt >1 kV transients before reaching optocoupler or Schmitt trigger inputs. Use Value: Absorbs 400 W pulses without degradation, maintaining signal integrity during factory floor electrical noise events. |
| Consumer Power Adapter Output Protection | Telecom Ethernet PHY Interface Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 5–12 V DC outputs of wall adapters and USB PD chargers exposed to capacitor discharge or hot-plug events. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed between VOUT and GND to clamp overshoot during regulation loop instability or cable disconnection. Use Value: 6.5 V VWM aligns with 5 V/9 V/12 V rails; 11.2 V VC ensures downstream LDOs and USB controllers remain within absolute maximum ratings. |
Use Scenario: Protecting 10/100/1000BASE-T Ethernet PHY pins (MDI) from lightning-induced surges and ESD per IEC 61000-4-5 and -4-2. IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at RJ45 connector pins to limit common-mode transients before magnetics and PHY IC. Use Value: Symmetrical clamping ensures equal protection on both line pairs; low capacitance (<100 pF) avoids signal integrity degradation at 100 MHz. |
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/I | Same electrical specs but RoHS-compliant (E3), non-halogen-free; lacks halogen-free certification. | Approved for commercial/industrial use but not automotive due to missing AEC-Q101 qualification. | Select when halogen-free requirement is absent and cost optimization is prioritized over automotive compliance. |
| SMBJ6.5CAHM3/I | Same VWM/VBR/VC but in SMB (DO-214AA) package; 400 W rating same, but higher thermal resistance (RθJA = 140 °C/W). | Better suited for lower-power, space-constrained layouts where 0.208" × 0.157" SMA footprint is unavailable. | Choose when PCB real estate allows larger SMB footprint and thermal management uses larger copper areas or heatsinking. |
Compared with SMAJ6.5CAHE3/I, the SMAJ6.5CAHM3/I adds halogen-free compliance and AEC-Q101 qualification for automotive deployment; versus SMBJ6.5CAHM3/I, it offers superior thermal performance in compact layouts due to lower RθJA and smaller footprint.
Availability
SMAJ6.5CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom Ethernet PHY safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMAJ6.5CAHM3/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, automotive qualification, and high-volume manufacturability.
The SMAJ series was developed specifically for board-level transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and repeatable clamping performance are mandatory.
FAQ
What does the "CA" suffix indicate in SMAJ6.5CAHM3/I?
The "CA" suffix denotes a bidirectional configuration, meaning SMAJ6.5CAHM3/I provides symmetrical clamping for both positive and negative voltage transients without polarity dependence. Unlike unidirectional "A" variants, SMAJ6.5CAHM3/I has no cathode band marking and functions identically in either direction - essential for AC-coupled or differential signal line protection.
Is SMAJ6.5CAHM3/I suitable for automotive applications?
Yes, SMAJ6.5CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It meets requirements for under-hood and cabin electronics, including engine control, body modules, and ADAS sensor interfaces where surge immunity and long-term reliability are critical.
What is the maximum clamping voltage of SMAJ6.5CAHM3/I and at what current is it specified?
The maximum clamping voltage (VC) of SMAJ6.5CAHM3/I is 11.2 V, measured at a peak pulse current (IPPM) of 35.7 A using the standardized 10/1000 μs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuits during worst-case surge events.
How does the SMA (DO-214AC) package of SMAJ6.5CAHM3/I affect thermal performance?
The SMA package delivers a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads - lower than SMB alternatives. This enables higher sustained surge duty cycles and improved reliability in thermally constrained automotive and industrial PCB layouts without additional heatsinking.
Does SMAJ6.5CAHM3/I meet UL safety certification requirements?
Yes, SMAJ6.5CAHM3/I is UL Recognized under file E136766 and standard UL 497B for protectors (QVGQ2), covering both unidirectional and bidirectional configurations. This certification validates its suitability for primary- and secondary-side surge protection in telecom, industrial, and consumer power systems requiring regulatory compliance.
SMAJ6.5CAHM3/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:
- 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):
- 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/I FAQ
1.How can I place an order for SMAJ6.5CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5CAHM3/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 SMAJ6.5CAHM3/I reliable?
The price and inventory of SMAJ6.5CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.5CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMAJ6.5CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5CAHM3/I?
SMAJ6.5CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5CAHM3/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 SMAJ6.5CAHM3/I?
For technical support, including SMAJ6.5CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5CAHM3/I requirements.
6.How does Aetrix verify that SMAJ6.5CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5CAHM3/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 SMAJ6.5CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMAJ6.5CAHM3/I?
All SMAJ6.5CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5CAHM3/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 SMAJ6.5CAHM3/I part is unused and in its original packaging.
Return procedure for SMAJ6.5CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5CAHM3/I Tags
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