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Vishay General Semiconductor - Diodes Division SMAJ5.0-E3/61
- Part No.:
- SMAJ5.0-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0-E3/61.pdf
- Description:
- TVS DIODE 5VWM 9.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,088
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Product details
Overview
SMAJ5.0-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on power and signal lines. It features a 5.0 V stand-off voltage (VWM), 6.40–7.82 V breakdown voltage (VBR) at 10 mA, 400 W peak pulse power (10/1000 µs), 41.7 V clamping voltage (VC) at 9.6 A peak pulse current, and operates across –55 °C to +150 °C junction temperature - used in automotive sensor line protection and industrial I/O interface surge suppression.
For engineers reviewing the SMAJ5.0-E3/61 datasheet, SMAJ5.0-E3/61 pinout, SMAJ5.0-E3/61 application, or SMAJ5.0-E3/61 equivalent, key selection criteria include unidirectional polarity, 5.0 V stand-off rating, DO-214AC thermal resistance (RθJA = 120 °C/W), 800 µA max reverse leakage at VWM, and compliance with AEC-Q101 when specified as HE3 variant.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its low incremental surge resistance ensures stable clamping under repetitive 10/1000 µs surges at 0.01% duty cycle, with derating above 25 °C per Fig. 2 of the datasheet.
The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine), supports automated placement, and meets J-STD-020 MSL Level 1 (260 °C peak reflow). Matte tin-plated leads comply with JESD22-B102 solderability and JESD201 Class 1A whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - Maximum DC or continuous reverse operating voltage before conduction begins; defines circuit compatibility with 5 V logic rails. |
| VBR (min/max) | 6.40 V / 7.82 V at 10 mA - Breakdown threshold range ensuring reliable turn-on during overvoltage events without premature triggering. |
| VC @ IPPM | 41.7 V at 9.6 A - Clamped voltage seen by protected circuit during 400 W transient; limits stress on downstream ICs like microcontrollers or transceivers. |
| IPPM | 9.6 A - Peak pulse current capability under 10/1000 µs waveform; determines survivability against IEC 61000-4-5 Level 4 surges. |
| PPPM | 400 W - Peak pulse power dissipation; enables robust protection in compact DO-214AC footprint without external heatsinking. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; informs board-level copper pad design (0.2" × 0.2") for thermal management under repeated surges. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-ended unidirectional configuration. Cathode identified by molded band on case end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path); conducts during reverse-transient clamping. |
| Cathode (banded end) | Reverse-biased terminal | Connected to protected line (e.g., 5 V supply or signal trace); initiates avalanche conduction when VLINE exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients (e.g., ISO 7637-2 Pulse 5a) without derating in standard PCB layouts. |
| Glass-passivated chip junction | Ensures long-term reliability and stable VBR performance under thermal cycling and humidity exposure. |
| MSL Level 1 moisture sensitivity | Allows direct placement without baking; compatible with standard SMT reflow profiles up to 260 °C peak. |
| RoHS-compliant matte tin plating | Supports lead-free assembly and meets JESD22-B102 solderability requirements for high-yield manufacturing. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., temperature, pressure) from load-dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role: Unidirectional TVS placed between sensor signal line and chassis ground to clamp spikes before they reach MCU ADC inputs or communication ICs. Use Value: Limits transient voltage to ≤41.7 V, preserving signal integrity and preventing latch-up in 5 V-tolerant interfaces while maintaining <800 µA leakage at nominal 5 V operation. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and relay contact bounce. IC Role / Device Role: Mounted at connector entry point to shunt surge energy to common ground, complementing upstream series impedance (e.g., 1 kΩ resistor). Use Value: Withstands 400 W pulses without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity standards for industrial control equipment. |
| Consumer USB Power Line Protection | Telecom Ethernet PHY Port Protection |
Use Scenario: Guarding 5 V VBUS lines in USB 2.0 host ports against hot-plug induced transients and ESD events during cable insertion. IC Role / Device Role: Unidirectional clamping device between VBUS and GND, selected for low VWM to avoid interfering with 4.75–5.25 V USB spec compliance. Use Value: Delivers 41.7 V clamping at 9.6 A while adding only 1.5 pF typical junction capacitance - negligible impact on USB signal rise time. |
Use Scenario: Shielding 10/100BASE-TX Ethernet PHY differential pairs from lightning-induced surges entering via RJ45 connectors in network switches and VoIP gateways. IC Role / Device Role: Used in pair-wise configuration (one per line) referenced to local ground, leveraging fast response to suppress sub-10 ns ESD events. Use Value: Achieves <1 ns response time and low dynamic impedance, reducing voltage overshoot on PHY pins to levels below absolute maximum ratings (e.g., ±16 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A-E3/61 | Lower VBR range (6.40–7.07 V), tighter tolerance; 9.2 V clamping at 43.5 A vs. 41.7 V at 9.6 A. | Better suited for precision 5 V rail protection where lower clamping voltage is prioritized over higher surge current handling. | Select SMAJ5.0A-E3/61 when system-level testing confirms lower VC improves margin for sensitive 5 V ICs without compromising surge rating. |
| SMBJ5.0-E3/52 | Same electrical specs but in larger DO-214AA (SMB) package; RθJA = 80 °C/W vs. 120 °C/W; 600 W PPPM rating. | Higher power handling and improved thermal performance, requiring more PCB area and different land pattern. | Choose SMBJ5.0-E3/52 when application demands >400 W surge capability or sustained transient repetition not supported by SMAJ5.0-E3/61's thermal limits. |
Compared with SMAJ5.0A-E3/61, the SMAJ5.0-E3/61 offers higher clamping voltage but broader VBR tolerance, making it more robust against process variation; versus SMBJ5.0-E3/52, it trades power capacity and thermal headroom for space-constrained designs where DO-214AC footprint is mandatory.
Availability
SMAJ5.0-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, consumer USB power lines, and telecom Ethernet PHY ports requiring stable component supply, RoHS compliance, and AEC-Q101-qualified alternatives upon request.
Supply support for SMAJ5.0-E3/61 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMAJ series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-speed, high-energy transient suppression in space-constrained surface-mount applications across automotive, industrial, and communications infrastructure.
FAQ
What is the polarity configuration of SMAJ5.0-E3/61?
The SMAJ5.0-E3/61 is a unidirectional TVS diode, with cathode indicated by a molded band on the DO-214AC package body. It conducts in reverse bias during overvoltage events and blocks current up to 5.0 V in forward direction - critical for correct placement on 5 V supply rails or signal lines referenced to ground. This polarity must be observed to ensure proper clamping behavior in the SMAJ5.0-E3/61.
Does SMAJ5.0-E3/61 meet automotive qualification standards?
The base SMAJ5.0-E3/61 is commercial-grade and RoHS-compliant but not AEC-Q101 qualified. For automotive applications, Vishay offers the SMAJ5.0AHE3/61 variant (HE3 suffix), which undergoes AEC-Q101 stress testing and is rated for under-hood environments. Engineers specifying SMAJ5.0-E3/61 should verify whether their design requires the enhanced reliability of the HE3 version.
What is the maximum reverse leakage current for SMAJ5.0-E3/61 at rated VWM?
The SMAJ5.0-E3/61 exhibits a maximum reverse leakage current (ID) of 800 µA at its 5.0 V stand-off voltage (VWM) and 25 °C ambient temperature. This value increases with temperature and must be accounted for in low-power or battery-operated circuits where standby current budget is tight - the SMAJ5.0-E3/61 remains within specification across its full –55 °C to +150 °C operating range.
How does the clamping voltage of SMAJ5.0-E3/61 compare to its breakdown voltage?
The SMAJ5.0-E3/61 has a minimum breakdown voltage (VBR) of 6.40 V at 10 mA test current, while its maximum clamping voltage (VC) is 41.7 V at 9.6 A peak pulse current. This ~6.5× ratio reflects the device's dynamic impedance under surge conditions and defines the worst-case overvoltage imposed on protected circuitry - a key parameter when evaluating margin for downstream 5 V ICs in the SMAJ5.0-E3/61 application.
Can SMAJ5.0-E3/61 be used in bi-directional transient protection?
No - SMAJ5.0-E3/61 is strictly unidirectional and unsuitable for AC or bidirectional signal line protection. For bi-directional applications such as RS-485 or USB D+/D– lines, Vishay specifies variants with "CA" suffix (e.g., SMAJ5.0CA), which feature symmetrical breakdown in both polarities. Using SMAJ5.0-E3/61 in place of a bi-directional TVS would result in forward conduction and potential failure during negative transients.
SMAJ5.0-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.6V
- Current - Peak Pulse (10/1000µs):
- 41.7A
- 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)
SMAJ5.0-E3/61 FAQ
1.How can I place an order for SMAJ5.0-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0-E3/61 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 SMAJ5.0-E3/61 reliable?
The price and inventory of SMAJ5.0-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ5.0-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ5.0-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0-E3/61?
SMAJ5.0-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0-E3/61 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 SMAJ5.0-E3/61?
For technical support, including SMAJ5.0-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0-E3/61 requirements.
6.How does Aetrix verify that SMAJ5.0-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0-E3/61 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 SMAJ5.0-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ5.0-E3/61?
All SMAJ5.0-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0-E3/61, 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 SMAJ5.0-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ5.0-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ5.0-E3/61 Tags
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