My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ6.5CA-E3/5A
- Part No.:
- SMAJ6.5CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5CA-E3/5A.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,278
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ6.5CA-E3/5A 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), and clamps to ≤11.2 V at 35.7 A peak surge current - ideal for protecting MOSFET gates, sensor interfaces, and automotive ECUs against ESD and load dump.
For engineers reviewing the SMAJ6.5CA-E3/5A datasheet, SMAJ6.5CA-E3/5A pinout, SMAJ6.5CA-E3/5A application, or SMAJ6.5CA-E3/5A equivalent, key selection criteria include bidirectional clamping capability, 150 °C max junction temperature, MSL Level 1 moisture sensitivity, 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, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable leakage (<500 μA at VWM) and fast response time (<1 ns), while low incremental surge resistance supports consistent clamping under repetitive transients.
The device complies with ANSI/IEEE C62.35 surge standards and meets AEC-Q101 qualification when ordered with HE3/HM3 suffixes. Thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), requiring thermal pad design per Vishay's recommended 0.2" × 0.2" copper layout for rated 400 W pulse handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 7.22 V / 7.98 V at 10 mA - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | ≤11.2 V at 35.7 A - clamped voltage during 400 W 10/1000 μs surge, limiting stress on downstream ICs |
| IPPM | 35.7 A - peak surge current supported under rated 400 W pulse condition |
| PPPM | 400 W - peak pulse power rating for 10/1000 μs waveform, derated above 25 °C |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 120 °C/W - thermal resistance requiring PCB copper pad area optimization for sustained surge duty |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unmarked bidirectional configuration - no cathode band; terminals are matte tin-plated leads compatible with J-STD-002 soldering standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | Accepts surge current during positive half-cycle; connects to protected line |
| Cathode | Transient current entry (negative polarity) | Accepts surge current during negative half-cycle; symmetrical to Anode in bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating nodes without polarity biasing circuitry |
| 400 W peak pulse power | Handles high-energy transients like ISO 7637-2 Pulse 1/2a/5a in automotive electronics |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking preconditioning |
| Glass passivated junction | Ensures long-term reliability and stable leakage performance over temperature and lifetime |
| RoHS-compliant (E3) | Meets global environmental compliance for commercial-grade industrial and consumer applications |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, responding within <1 ns to limit transient overshoot. Use Value: Maintains signal integrity by clamping to ≤11.2 V, preventing latch-up or gate oxide damage in connected transceivers and microcontrollers. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Transient suppressor mounted at connector interface, shunting surge energy before it reaches isolation barriers or FPGA I/O banks. Use Value: Withstands 400 W pulses without degradation, ensuring system uptime in factory automation where maintenance windows are constrained. |
| Consumer Power Adapter Interface | Telecom Line Card Surge Protection |
Use Scenario: Input-stage protection for USB-C PD adapters and AC/DC front-ends against ESD and lightning-induced surges on primary-side DC rails. IC Role / Device Role / Timing Role: Primary-level TVS placed after rectification but before bulk capacitor, absorbing line-to-ground transients. Use Value: 6.5 V VWM allows compatibility with 5 V–12 V rail systems while providing margin above nominal voltage. | Use Scenario: Secondary-side protection on Ethernet PHY interfaces and xDSL line drivers subjected to induced surges from nearby power lines. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on differential pairs, minimizing signal distortion at 100 Mbps+ data rates. Use Value: Junction capacitance <100 pF (typ.) at VWM preserves signal rise/fall times without compromising surge immunity. |
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 | Halogen-free, RoHS-compliant variant with identical electrical specs and package | Required for halogen-free BOM compliance in EU/Asia-sourced industrial equipment | Select when material compliance mandates halogen-free construction without altering layout or performance |
| SMAJ6.0CA-E3/5A | Lower VWM (6.0 V) and VBR (6.67–7.37 V); same 400 W rating and SMA package | Better suited for tighter-margin 5 V systems where 6.5 V VWM risks false triggering | Choose for legacy 5 V logic rails needing lower clamping threshold while retaining footprint compatibility |
Compared with SMAJ6.5CA-E3/5A, the SMAJ6.5CA-M3/5A offers identical protection performance with halogen-free molding compound, whereas SMAJ6.0CA-E3/5A provides earlier clamping onset for more sensitive 5 V circuits - both retain SMA footprint and thermal design requirements.
Availability
SMAJ6.5CA-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and consumer power adapter designs requiring stable component supply and full traceability.
Supply support for SMAJ6.5CA-E3/5A 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where high-energy surge immunity and long-term stability are critical.
FAQ
What is the clamping voltage of SMAJ6.5CA-E3/5A at its rated peak pulse current?
The SMAJ6.5CA-E3/5A clamps to a maximum of 11.2 V at its peak pulse current of 35.7 A, measured under the standard 10/1000 μs waveform. This value is specified in the Vishay datasheet (Document Number: 88390, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ6.5CA-E3/5A maintains this clamping performance across its operational temperature range.
Is SMAJ6.5CA-E3/5A suitable for automotive applications?
SMAJ6.5CA-E3/5A is qualified for commercial-grade automotive use when paired with appropriate system-level validation; however, the AEC-Q101-qualified version requires the HE3 or HM3 suffix (e.g., SMAJ6.5CAHE3_A/I). The SMAJ6.5CA-E3/5A itself meets all electrical and mechanical specifications referenced in the Vishay datasheet and is widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment interfaces.
What does the "CA" suffix indicate in SMAJ6.5CA-E3/5A?
The "CA" suffix in SMAJ6.5CA-E3/5A denotes a bidirectional configuration - meaning the device functions identically in both forward and reverse bias directions, with matched breakdown and clamping characteristics. This enables symmetric transient suppression on AC-coupled lines, differential buses, or floating nodes without requiring polarity-aware layout. Unidirectional variants use "A" only (e.g., SMAJ6.5A).
What is the maximum printed circuit board copper pad size recommended for SMAJ6.5CA-E3/5A to achieve full 400 W rating?
Vishay specifies that the full 400 W peak pulse power rating for SMAJ6.5CA-E3/5A is achieved when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in the Absolute Maximum Ratings table. Smaller pads result in thermal derating; the SMAJ6.5CA-E3/5A datasheet provides derating curves (Fig. 2) showing reduced PPPM above 25 °C ambient when using smaller thermal land patterns.
How does the leakage current of SMAJ6.5CA-E3/5A compare to similar TVS diodes at 6.5 V?
At its 6.5 V stand-off voltage (VWM), the SMAJ6.5CA-E3/5A exhibits a maximum reverse leakage current (ID) of 500 μA, per the Vishay datasheet. This is typical for SMAJ-series bidirectional TVS devices and aligns with industry standards for 6–7 V-rated suppressors. Lower-leakage alternatives exist but typically trade off higher VBR tolerance or reduced surge capability - the SMAJ6.5CA-E3/5A balances low leakage with 400 W pulse handling in a compact SMA package.
SMAJ6.5CA-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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-E3/5A FAQ
1.How can I place an order for SMAJ6.5CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5CA-E3/5A 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 SMAJ6.5CA-E3/5A reliable?
The price and inventory of SMAJ6.5CA-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.5CA-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ6.5CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5CA-E3/5A?
SMAJ6.5CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5CA-E3/5A 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 SMAJ6.5CA-E3/5A?
For technical support, including SMAJ6.5CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5CA-E3/5A requirements.
6.How does Aetrix verify that SMAJ6.5CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5CA-E3/5A 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 SMAJ6.5CA-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ6.5CA-E3/5A?
All SMAJ6.5CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5CA-E3/5A, 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 SMAJ6.5CA-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ6.5CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5CA-E3/5A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
