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Vishay General Semiconductor - Diodes Division SMAJ6.5CAHE3/5A
- Part No.:
- SMAJ6.5CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5CAHE3/5A.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,750
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Product details
Overview
SMAJ6.5CAHE3/5A 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), 35.7 A peak pulse current (IPPM), and 11.2 V maximum clamping voltage (VC) - enabling robust protection of ICs, MOSFETs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ6.5CAHE3/5A datasheet, SMAJ6.5CAHE3/5A pinout, SMAJ6.5CAHE3/5A application, or SMAJ6.5CAHE3/5A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 11.2 V clamping at 35.7 A, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical electrical characteristics in forward and reverse directions per ANSI/IEEE C62.35 standards. Its glass-passivated junction ensures stable breakdown behavior under repetitive surge stress, while low incremental surge resistance supports fast energy dissipation without thermal runaway.
The device is rated for 150 °C maximum junction temperature and exhibits a typical thermal resistance of 120 °C/W (junction-to-ambient) on standard PCB pad layout. Its MSL Level 1 rating (JEDEC J-STD-020) and 260 °C lead-free reflow compatibility confirm suitability for high-reliability automated assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below circuit operating voltage. |
| VBR (min/max) | 7.22 V / 7.98 V at 10 mA - Confirmed breakdown range ensures reliable turn-on during transient events without premature conduction. |
| VC @ IPPM | 11.2 V at 35.7 A - Clamping voltage limits downstream component stress during 400 W, 10/1000 μs surge pulses. |
| PPPM | 400 W - Peak pulse power handling capacity with 0.01 % duty cycle; sufficient for inductive switching and ESD-like transients. |
| IPPM | 35.7 A - Peak surge current capability derived from VC and PPPM; defines minimum trace/solder joint robustness requirements. |
| TJ max. | 150 °C - Maximum junction temperature enables operation in under-hood automotive or enclosed industrial environments. |
| Package | SMA (DO-214AC) - Low-profile surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height; optimized for pick-and-place. |
Pinout & Package
Package: SMA (DO-214AC), molded case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity unmarked for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Accepts surge current from either direction; connects to protected line without polarity dependency. |
| Cathode | Transient current exit point (bidirectional) | Completes low-impedance path to ground or reference rail during clamping; no cathode band marking on SMAJ6.5CAHE3/5A. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per stress test plan. |
| 400 W peak pulse power | Handles 10/1000 μs transients up to 35.7 A without degradation; maintains clamping performance over >1000 surges. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<500 μA at VWM) across -55 °C to +150 °C operating range. |
| MSL Level 1 | Zero floor life limitation; supports unlimited exposure to ambient conditions prior to reflow soldering at 260 °C peak. |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS compliance; HM3 variant available for halogen-free requirement without performance trade-off. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 5 V CAN transceiver power rails against load dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between VCC and GND, responding within <1 ps to limit voltage excursions. Use Value: Limits rail voltage to ≤11.2 V during 35.7 A surges, preventing latch-up or permanent damage to 5 V logic interfaces. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Parallel-connected TVS shunting induced surges from nearby motor drives or relay coils. Use Value: Clamps transients before they exceed sensor IC's absolute maximum rating (typically ±15 V), preserving measurement integrity. |
| Consumer USB Port ESD Protection | Telecom Data Line Surge Suppression |
Use Scenario: Secondary-level protection on USB VBUS line in portable chargers and docking stations subjected to IEC 61000-4-2 contact discharge. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed upstream of USB power switch ICs. Use Value: Absorbs 8 kV ESD pulses with sub-100 ps response, limiting VBUS overshoot to 11.2 V and avoiding overvoltage shutdown. |
Use Scenario: Protecting RS-485 transceiver I/O pins in base station backhaul equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Differential-mode TVS pair (one per line) referenced to common-mode ground. Use Value: Maintains signal integrity by clamping differential transients to <22.4 V (2 × VC) while preserving DC bias margins. |
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-M3/5A | Same electrical specs and package; halogen-free molding compound instead of standard RoHS-compliant epoxy. | Required where halogen-free compliance is mandated (e.g., EU public infrastructure tenders). | Select when environmental compliance exceeds standard RoHS requirements; no layout or performance change needed. |
| SMAJ6.5CAHE3/61 | Identical device with same HE3 qualification and specs; differs only in packaging - 7" tape/reel (1800 pcs) vs. 13" reel (7500 pcs). | Suitable for low-volume prototyping or pilot production runs with smaller batch sizes. | Choose based on procurement volume and SMT line feeder compatibility; fully interchangeable electrically and mechanically. |
Compared with SMAJ6.5CAHE3/5A, the M3/5A variant adds halogen-free certification without altering clamping performance or thermal behavior, while the HE3/61 version offers identical functionality in a smaller reel format - enabling flexibility in supply chain planning without design revision.
Availability
SMAJ6.5CAHE3/5A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and consumer USB port ESD suppression requiring stable component supply across multi-year production cycles.
Supply support for SMAJ6.5CAHE3/5A 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, efficiency, and application-specific optimization.
The SMAJ series was developed for high-energy transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and telecom systems where AEC-Q101 qualification and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMAJ6.5CAHE3/5A at its rated peak pulse current?
The SMAJ6.5CAHE3/5A has a maximum clamping voltage (VC) of 11.2 V at its rated peak pulse current (IPPM) of 35.7 A, measured under the standardized 10/1000 μs waveform. This value ensures protected circuits remain within safe operating limits during surge events. The SMAJ6.5CAHE3/5A achieves this with low incremental surge resistance and stable junction behavior across temperature.
Is SMAJ6.5CAHE3/5A suitable for automotive applications?
Yes, SMAJ6.5CAHE3/5A is AEC-Q101 qualified and explicitly designated for automotive use via its HE3 suffix. It meets stress test requirements for temperature cycling, high-temperature reverse bias, and surge endurance relevant to engine control units, body electronics, and infotainment systems. The SMAJ6.5CAHE3/5A operates reliably from −55 °C to +150 °C and supports lead-free reflow at 260 °C.
How does the bidirectional configuration of SMAJ6.5CAHE3/5A affect its circuit implementation?
The SMAJ6.5CAHE3/5A has no polarity marking and delivers identical VBR, VC, and IPPM characteristics in both directions, simplifying layout by eliminating orientation constraints. It is placed directly across the protected line and ground (or reference rail), enabling symmetrical clamping of positive and negative transients - ideal for AC-coupled signals or floating bus lines. The SMAJ6.5CAHE3/5A requires no external biasing or directional routing.
What is the thermal resistance of SMAJ6.5CAHE3/5A, and how does it impact PCB layout?
SMAJ6.5CAHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures during repetitive surges, designers must allocate adequate copper area and avoid excessive trace length. The SMAJ6.5CAHE3/5A also exhibits RθJL = 30 °C/W, indicating efficient heat transfer to PCB leads.
Does SMAJ6.5CAHE3/5A meet moisture sensitivity level (MSL) requirements for modern SMT assembly?
Yes, SMAJ6.5CAHE3/5A is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and withstands peak reflow temperatures up to 260 °C without preconditioning. This eliminates bake-out steps and supports direct placement into high-throughput, lead-free reflow processes - a critical advantage for high-volume manufacturing of automotive and industrial modules using SMAJ6.5CAHE3/5A.
SMAJ6.5CAHE3/5A 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ6.5CAHE3/5A FAQ
1.How can I place an order for SMAJ6.5CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5CAHE3/5A 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 SMAJ6.5CAHE3/5A reliable?
The price and inventory of SMAJ6.5CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.5CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ6.5CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5CAHE3/5A?
SMAJ6.5CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5CAHE3/5A 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 SMAJ6.5CAHE3/5A?
For technical support, including SMAJ6.5CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5CAHE3/5A requirements.
6.How does Aetrix verify that SMAJ6.5CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5CAHE3/5A 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 SMAJ6.5CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ6.5CAHE3/5A?
All SMAJ6.5CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5CAHE3/5A, 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 SMAJ6.5CAHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ6.5CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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