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Vishay General Semiconductor - Diodes Division SMAJ5.0CAHE3/61
- Part No.:
- SMAJ5.0CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0CAHE3/61.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ5.0CAHE3/61 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 5.0 V stand-off voltage (VWM), 6.40–7.25 V breakdown voltage (VBR), 400 W peak pulse power (10/1000 μs), 9.2 V maximum clamping voltage (VC) at 43.5 A IPPM, and AEC-Q101 qualification for automotive electronics protection.
For engineers reviewing the SMAJ5.0CAHE3/61 datasheet, SMAJ5.0CAHE3/61 pinout, SMAJ5.0CAHE3/61 application, or SMAJ5.0CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM ≈ 1.84), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on PCBs handling inductive switching surges in automotive ECUs and sensor interfaces.
Technical Context
This TVS diode operates as a voltage-clamping protection device across two terminals, responding to transient overvoltages in both polarities due to its bidirectional construction. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 μs pulses at 0.01% duty cycle.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W. It meets UL 497B recognition (QVGQ2) and complies with ANSI/IEEE C62.35 surge standards, supporting robust protection in environments subject to ESD, lightning-induced surges, and load-dump events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 5 V logic/sensor rails. |
| VBR min/max | 6.40 V / 7.25 V at 10 mA - Breakdown voltage range ensures reliable turn-on during transients while avoiding false triggering. |
| VC @ IPPM | 9.2 V at 43.5 A - Clamping voltage limits downstream IC stress during 400 W surge; clamping ratio VC/VWM = 1.84 supports tight voltage margin design. |
| PPPM | 400 W (10/1000 μs) - Peak pulse power rating determines survivability against common industrial/automotive surge waveforms. |
| ID @ VWM | 800 μA - Low leakage current preserves signal integrity and minimizes standby power loss in always-on circuits. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal layout for effective power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation; RoHS-compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity event) | One terminal of symmetrical PN junction; conducts during negative-going surges relative to cathode reference. |
| Cathode | Transient current entry (positive polarity event) | Other terminal of symmetrical junction; conducts during positive-going surges - functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| 400 W peak pulse power | Supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity when properly laid out with 5 mm² copper pads. |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control modules, ADAS sensors, and infotainment interfaces. |
| MSL Level 1 (260 °C) | Permits standard lead-free reflow without pre-baking, reducing manufacturing complexity and cost. |
| Glass passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift. |
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 ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to limit transient energy entering signal conditioning circuitry. Use Value: Maintains signal integrity below 9.2 V clamping threshold during 400 W surges, preventing latch-up or damage to 5 V rail-connected MCUs and ADCs. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against inductive kickback from solenoids, relays, and motor drivers. IC Role / Device Role / Timing Role: Fast-response shunt protector mounted adjacent to terminal block to divert surge current before reaching isolation barriers or FPGA I/O banks. Use Value: Sub-1 ns response and low clamping voltage ensure microcontroller GPIOs remain within absolute maximum ratings during repetitive 10/1000 μs transients. |
| Consumer USB Port Protection | Telecom Line Interface Protection |
Use Scenario: Shielding USB 2.0 data lines (D+/D−) and VBUS from ESD (IEC 61000-4-2 ±15 kV) and cable discharge events in portable devices. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed between differential pair and host controller to suppress common-mode transients without distorting signal edges. Use Value: 800 μA leakage at 5.0 V VWM avoids pull-up/pull-down interference; compact SMA footprint fits tight board space near USB connectors. |
Use Scenario: Guarding Ethernet PHY interfaces and telephone line drivers against lightning-induced surges and AC power cross-talk in VoIP gateways and DSL modems. IC Role / Device Role / Timing Role: Primary-level surge suppressor on line-side transformer secondary windings to absorb energy before reaching sensitive transceiver ICs. Use Value: UL 497B recognition confirms suitability for telecom safety standards; 150 °C TJ rating supports operation in sealed, thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated by OEM or regional regulation. | Choose SMAJ5.0CA-M3/61 when halogen-free bill-of-materials requirements apply; otherwise SMAJ5.0CAHE3/61 offers same performance with standard RoHS compliance. |
| SMBJ5.0CAHE3/61 | Same VWM/VBR/VC specs but in larger SMB (DO-214AA) package; 600 W PPPM rating (vs. 400 W); higher thermal mass. | Better suited for higher-energy surge environments (e.g., 12 V battery rails) where PCB layout allows larger footprint and enhanced heat dissipation. | Select SMBJ5.0CAHE3/61 only if system-level surge testing exceeds 400 W or thermal derating margins require lower RθJA; SMAJ5.0CAHE3/61 remains optimal for space-constrained 5 V signal line protection. |
Compared with SMAJ5.0CA-M3/61, SMAJ5.0CAHE3/61 provides identical protection performance with standard RoHS compliance, while SMBJ5.0CAHE3/61 trades smaller size for higher surge capacity and thermal robustness-making SMAJ5.0CAHE3/61 the preferred choice for AEC-Q101-compliant, space-sensitive 5 V bidirectional clamping.
Availability
SMAJ5.0CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and consumer USB port protection requiring stable component supply, AEC-Q101 reliability, and consistent surge immunity performance.
Supply support for SMAJ5.0CAHE3/61 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems-delivering precise clamping, fast response, and qualification-grade consistency for mission-critical protection.
FAQ
What does the "CA" suffix indicate in SMAJ5.0CAHE3/61?
The "CA" suffix denotes a bidirectional configuration: SMAJ5.0CAHE3/61 functions identically for both positive and negative polarity transients, unlike unidirectional variants (e.g., SMAJ5.0A). This eliminates polarity marking requirements and simplifies layout for AC-coupled or floating signal paths. The device achieves symmetrical clamping behavior across its two terminals, confirmed by identical VBR min/max values in both directions per Vishay Document 88390.
Is SMAJ5.0CAHE3/61 suitable for protecting a 5 V USB data line?
Yes, SMAJ5.0CAHE3/61 is appropriate for USB 2.0 data line protection: its 5.0 V VWM aligns with standard 5 V VBUS tolerance, 9.2 V VC limits stress on transceiver ESD structures, and 800 μA ID at VWM avoids signal distortion. The SMA package's low parasitic capacitance (typical ~500 pF at 0 V, per Fig. 4) maintains signal integrity up to 480 Mbps, and AEC-Q101 qualification ensures robustness in portable and automotive USB applications.
How does the HE3 suffix affect the specifications of SMAJ5.0CAHE3/61?
The HE3 suffix indicates RoHS-compliant construction with AEC-Q101 qualification-no electrical parameter changes versus non-HE3 variants. SMAJ5.0CAHE3/61 retains identical VWM (5.0 V), VBR (6.40–7.25 V), VC (9.2 V), and PPPM (400 W), but adds automotive-grade reliability validation, MSL Level 1 rating, and UL 497B recognition. This makes it suitable for under-hood and safety-critical systems where standard commercial-grade parts are insufficient.
What is the maximum allowable PCB copper pad size for optimal thermal performance of SMAJ5.0CAHE3/61?
Vishay specifies thermal ratings based on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal-this layout yields RθJA = 120 °C/W and supports full 400 W PPPM rating. Reducing pad area increases thermal resistance and requires derating per Fig. 2; increasing pad size beyond 5 mm² offers diminishing returns due to SMA package limitations. For sustained power dissipation, use internal ground/power planes connected via multiple vias to enhance heat spreading without altering the recommended pad dimensions.
Can SMAJ5.0CAHE3/61 replace SMAJ5.0A in a bidirectional circuit?
No-SMAJ5.0A is unidirectional and will not protect against negative-polarity transients. SMAJ5.0CAHE3/61 must be used where bidirectional clamping is required; substituting SMAJ5.0A risks failure during reverse surges. The "CA" designation is essential for symmetric protection, and datasheet Table "ELECTRICAL CHARACTERISTICS" explicitly separates unidirectional (SMAJ5.0A) and bidirectional (SMAJ5.0CA) entries with distinct marking codes (AE vs. WE) and test conditions.
SMAJ5.0CAHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 43.5A
- 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)
SMAJ5.0CAHE3/61 FAQ
1.How can I place an order for SMAJ5.0CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0CAHE3/61 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 SMAJ5.0CAHE3/61 reliable?
The price and inventory of SMAJ5.0CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ5.0CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ5.0CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0CAHE3/61?
SMAJ5.0CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0CAHE3/61 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 SMAJ5.0CAHE3/61?
For technical support, including SMAJ5.0CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ5.0CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0CAHE3/61 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 SMAJ5.0CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ5.0CAHE3/61?
All SMAJ5.0CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0CAHE3/61, 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 SMAJ5.0CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ5.0CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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