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Vishay General Semiconductor - Diodes Division SMAJ5.0C-E3/5A
- Part No.:
- SMAJ5.0C-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0C-E3/5A.pdf
- Description:
- TVS DIODE 5VWM 9.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ5.0C-E3/5A from Vishay General Semiconductor is a bi-directional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on signal and power lines. It features 5.0 V stand-off voltage (VWM), 41.7 V maximum clamping voltage (VC) at 9.6 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial electronics.
For engineers reviewing the SMAJ5.0C-E3/5A datasheet, SMAJ5.0C-E3/5A pinout, SMAJ5.0C-E3/5A application, or SMAJ5.0C-E3/5A equivalent, this page delivers verified electrical parameters, bi-directional clamping behavior, DO-214AC mechanical data, RoHS-compliant packaging, and direct alternatives for ESD/surge protection design-in.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified between 6.40 V and 7.82 V at 10 mA test current, and reverse leakage current ≤800 µA at 5.0 V stand-off. Its low clamping ratio (VC/VWM ≈ 8.3) ensures effective overvoltage suppression without excessive voltage overshoot during transient events.
Thermal resistance is characterized at RθJA = 120 °C/W (junction-to-ambient) and RθJL = 30 °C/W (junction-to-lead), supporting reliable operation up to +150 °C junction temperature. The device meets J-STD-020 MSL Level 1 and withstands solder reflow at 260 °C for 40 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR (min/max) | 6.40 V / 7.82 V at 10 mA - Ensures consistent avalanche initiation across production lots and temperature range. |
| VC @ IPPM | 41.7 V at 9.6 A - Clamped voltage seen by protected circuit during 400 W, 10/1000 µs surge; limits stress on downstream components. |
| PPPM | 400 W - Peak pulse power handling per 10/1000 µs waveform; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges. |
| IPPM | 9.6 A - Peak surge current capability; determines minimum trace width and PCB copper pad sizing (0.2 × 0.2″ required). |
| Junction Temp Range | –55 °C to +150 °C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with cathode band omitted (bi-directional); compatible with automated pick-and-place. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with two coplanar terminals; no polarity marking for bi-directional configuration; matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity; no DC bias dependency. |
| Case | Non-conductive molded body | No thermal or electrical connection to PCB ground plane; thermal path relies solely on lead conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity concerns. |
| 400 W peak pulse power | Supports robust immunity against lightning-induced surges and inductive switching transients in 24 V industrial control systems. |
| Low clamping voltage (41.7 V) | Keeps protected 5 V logic interfaces within absolute maximum ratings during 8/20 µs surge events when combined with series impedance. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile use without baking - reduces manufacturing overhead in high-volume SMT lines. |
| RoHS-compliant & whisker-tested | E3 suffix meets JESD201 Class 1A tin whisker resistance, qualifying for long-life automotive and medical-grade applications. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) connected to microcontroller ADC inputs in engine control units. IC Role / Device Role / Timing Role: Bi-directional TVS placed directly at connector entry point to clamp ±1 kV ESD and load-dump transients before reaching signal conditioning circuitry. Use Value: Prevents latch-up or permanent damage to 12-bit SAR ADCs and op-amps operating from 5 V rails while maintaining <10 pF junction capacitance. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Standoff-rated TVS shunting transients across optocoupler input terminals to preserve isolation barrier integrity and prevent false triggering. Use Value: Maintains functional safety compliance (IEC 61000-4-4/5) with <100 ns response time and no degradation after 1000+ surge events at rated energy. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceiver pins in networked building automation nodes from induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Paired bi-directional TVS devices on A/B differential lines, referenced to local ground, enabling common-mode and differential-mode transient suppression. Use Value: Achieves >30 kV ESD contact discharge immunity per IEC 61000-4-2 while preserving signal integrity up to 10 Mbps due to low dynamic resistance. |
Use Scenario: Guarding H-bridge gate drivers in smart appliance motor inverters against shoot-through-inducing voltage spikes during PWM commutation. IC Role / Device Role / Timing Role: Local clamping at half-bridge leg outputs to limit VDS overshoot on 600 V MOSFETs during inductive turn-off. Use Value: Reduces need for snubbers and extends MOSFET lifetime by limiting dv/dt-induced gate oscillation and avalanche stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0CA-E3/5A | Identical electrical specs and DO-214AC package; CA suffix denotes same bi-directional construction as C variant per Vishay documentation. | No functional difference; CA and C are interchangeable per Vishay's ordering matrix and device marking code table. | Select SMAJ5.0CA-E3/5A only if legacy BOM references CA suffix; otherwise SMAJ5.0C-E3/5A is preferred stock item. |
| SMBJ5.0C-E3/52 | Same VWM, VC, and bi-directional function but in larger DO-214AA (SMB) package with 600 W PPPM rating and higher IPPM (17.5 A). | Better suited for higher-energy surges (e.g., 4 kV IEC 61000-4-5) but requires larger PCB footprint and different thermal pad layout. | Choose SMBJ5.0C-E3/52 when system-level surge testing exceeds 400 W requirements or when board space allows larger package for derating margin. |
Compared with SMAJ5.0C-E3/5A, SMAJ5.0CA-E3/5A offers identical protection performance in the same footprint, while SMBJ5.0C-E3/52 trades compactness for 50 % higher surge power handling - making the former ideal for space-constrained automotive modules and the latter appropriate for industrial mains-connected interfaces.
Availability
SMAJ5.0C-E3/5A is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interface boards, and consumer appliance motor controllers requiring stable component supply and full traceability.
Supply support for SMAJ5.0C-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and AEC-Q qualified automotive solutions.
The SMAJ family was engineered specifically for surface-mount transient suppression in harsh environments - delivering repeatable clamping performance, low leakage, and robust surge endurance across –55 °C to +150 °C operation.
FAQ
What is the key difference between SMAJ5.0C-E3/5A and SMAJ5.0A-E3/5A?
The SMAJ5.0C-E3/5A is bi-directional, while SMAJ5.0A-E3/5A is uni-directional. This means SMAJ5.0C-E3/5A clamps voltage transients of either polarity - critical for protecting AC-coupled or floating signal lines - whereas SMAJ5.0A-E3/5A only protects against reverse-biased surges and requires correct orientation during placement. Their VWM, VC, and PPPM differ accordingly: SMAJ5.0C-E3/5A has VC = 41.7 V at 9.6 A, while SMAJ5.0A-E3/5A has VC = 9.2 V at 43.5 A.
Does SMAJ5.0C-E3/5A have a polarity marking on the package?
No, SMAJ5.0C-E3/5A does not feature a cathode band or other polarity marking because it is a bi-directional TVS diode. The DO-214AC (SMA) case is symmetrical, and either terminal functions identically regardless of applied transient polarity. This eliminates orientation errors during automated assembly and simplifies layout for differential or AC signal paths.
What is the maximum printed circuit board copper pad size recommended for SMAJ5.0C-E3/5A?
Vishay specifies a minimum pad layout of 0.2 × 0.2 inch (5.0 × 5.0 mm) copper area per terminal to achieve the rated 400 W peak pulse power dissipation. Using smaller pads reduces thermal mass and increases junction temperature during surge events, potentially degrading clamping performance or causing parametric shift after repeated stress. The SMAJ5.0C-E3/5A datasheet explicitly ties PPPM derating to this pad size.
Is SMAJ5.0C-E3/5A qualified for automotive applications?
SMAJ5.0C-E3/5A is RoHS-compliant and meets J-STD-020 MSL Level 1, but it is not AEC-Q101 qualified. For automotive-grade use, Vishay offers the SMAJ5.0CHE3/5A variant (HE3 suffix), which carries AEC-Q101 qualification and enhanced reliability testing. Engineers must select SMAJ5.0CHE3/5A - not SMAJ5.0C-E3/5A - for under-hood or safety-critical vehicle subsystems.
How does the junction capacitance of SMAJ5.0C-E3/5A affect high-speed signal lines?
The junction capacitance of SMAJ5.0C-E3/5A is not published in the provided datasheet, but bi-directional SMAJ devices typically exhibit <100 pF at VWM. For high-speed interfaces like USB 2.0 or CAN FD, this capacitance may introduce signal rise-time degradation or reflection if placed directly on data lines without series impedance. Designers should verify signal integrity via simulation or measurement and consider using lower-capacitance TVS arrays where bandwidth exceeds 10 MHz.
SMAJ5.0C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ5.0C-E3/5A FAQ
1.How can I place an order for SMAJ5.0C-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0C-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 SMAJ5.0C-E3/5A reliable?
The price and inventory of SMAJ5.0C-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 SMAJ5.0C-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ5.0C-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0C-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0C-E3/5A?
SMAJ5.0C-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0C-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 SMAJ5.0C-E3/5A?
For technical support, including SMAJ5.0C-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0C-E3/5A requirements.
6.How does Aetrix verify that SMAJ5.0C-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0C-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 SMAJ5.0C-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ5.0C-E3/5A?
All SMAJ5.0C-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0C-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 SMAJ5.0C-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ5.0C-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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