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Vishay General Semiconductor - Diodes Division SMAJ5.0-E3/5A
- Part No.:
- SMAJ5.0-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0-E3/5A.pdf
- Description:
- TVS DIODE 5VWM 9.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,678
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Product details
Overview
SMAJ5.0-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, rated for 5.0 V stand-off voltage, 400 W peak pulse power (10/1000 µs), and clamping at 9.6 V under 41.7 A surge current - deployed to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and automotive electronics.
For engineers reviewing the SMAJ5.0-E3/5A datasheet, SMAJ5.0-E3/5A pinout, SMAJ5.0-E3/5A application, or SMAJ5.0-E3/5A equivalent, key selection criteria include unidirectional polarity, 6.4–7.82 V breakdown range at 10 mA, ≤800 µA reverse leakage at 5.0 V, 120 °C/W junction-to-ambient thermal resistance, and RoHS-compliant matte tin-plated leads suitable for automated placement and 260 °C solder reflow.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold (VBR = 6.40–7.82 V at IT = 10 mA), limiting transient-induced overvoltage to ≤9.6 V at 41.7 A peak pulse current. Its glass-passivated junction ensures stable performance across -55 °C to +150 °C operating temperature range.
The device uses a single-junction silicon avalanche structure with low incremental surge resistance and fast response time (<1 ps), enabling effective suppression of ESD, lightning-induced surges, and inductive kickback on DC power rails and low-speed signal lines - validated per ANSI/IEEE C62.35 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - Maximum continuous reverse working voltage before clamping begins; sets minimum system rail margin for reliable operation. |
| VBR (min/max) | 6.40 V / 7.82 V at 10 mA - Confirmed breakdown window defining turn-on consistency across production lots. |
| VC @ IPPM | 9.6 V at 41.7 A - Clamped voltage during 400 W 10/1000 µs surge; determines protected circuit's maximum stress level. |
| IPPM | 41.7 A - Peak surge current capability under standard waveform; defines energy-handling capacity per event. |
| ID @ VWM | ≤800 µA - Reverse leakage at rated stand-off voltage; critical for low-power sensor and battery-backed circuits. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; guides PCB thermal layout for sustained surge duty. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded epoxy case meeting UL 94 V-0 flammability rating; cathode indicated by band on one end; matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (uni-directional) | Connected to lower-potential side of protected line; conducts only during forward surge or bias conditions. |
| Cathode | Avalanche conduction terminal | Marked end; connected to higher-potential side; initiates clamping when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 5 V rails without derating. |
| Glass-passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure. |
| MSL Level 1 (260 °C reflow) | Supports single-pass lead-free reflow assembly without preconditioning or floor-life restrictions. |
| JESD201 Class 1A whisker resistance | Eliminates tin whisker risk in high-reliability applications including automotive control modules. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against flyback voltage from relay coils and solenoid actuation. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping transients within 1 ns to prevent latch-up or oxide damage. Use Value: Limits voltage excursion to 9.6 V during 41.7 A surge, preserving 5 V logic integrity and extending MCU lifetime under repeated switching stress. | Use Scenario: Shielding LIN bus transceivers and sensor inputs (e.g., ambient temperature, door position) from load dump and jump-start events. IC Role / Device Role / Timing Role: Standoff-rated TVS on 5 V supply line, absorbing repetitive 400 W pulses without degradation per AEC-Q101 qualification. Use Value: Maintains ≤800 µA leakage at 5.0 V, ensuring minimal impact on battery drain in always-on vehicle subsystems. |
| Consumer Power Adapters | Telecom Base Station Monitoring |
Use Scenario: Input-side surge suppression on 5 V USB-powered devices exposed to ESD and AC line coupling. IC Role / Device Role / Timing Role: Primary clamping element on DC input path, activated before downstream LDO or DC-DC converter input stage. Use Value: Fast <1 ps response captures sub-microsecond ESD events, preventing latch-up in PMICs and reducing need for secondary filtering. | Use Scenario: Protection of remote sensor interface cards receiving 5 V bias over long cables susceptible to induced lightning surges. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF at 0 V) on analog sensor inputs, minimizing signal distortion at DC–10 kHz bandwidth. Use Value: Delivers 400 W pulse handling while maintaining <100 pF junction capacitance, preserving signal fidelity in precision monitoring circuits. |
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-E3/5A | Lower VBR range (6.40–7.07 V), tighter tolerance; 9.2 V clamping at 43.5 A. | Better suited for systems requiring lower clamping voltage margin on 5 V rails with tighter VBR consistency. | Select when design requires reduced clamping overshoot and tighter VBR distribution across temperature. |
| SMBJ5.0-E3/52 | Same VWM/VBR specs but in larger DO-214AA (SMB) package; 600 W peak power rating. | Higher thermal mass supports higher average surge duty cycles; requires larger PCB footprint. | Choose for applications needing extended surge endurance or where board space allows SMB footprint. |
Compared with SMAJ5.0A-E3/5A, the original SMAJ5.0-E3/5A offers higher clamping voltage but broader VBR tolerance, while SMBJ5.0-E3/52 delivers greater power handling at the cost of size - making SMAJ5.0-E3/5A optimal for space-constrained 5 V protection where 400 W peak capacity suffices.
Availability
SMAJ5.0-E3/5A is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and consumer power adapters requiring stable component supply, full traceability, and RoHS-compliant sourcing.
Supply support for SMAJ5.0-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, efficiency, and application-specific optimization.
The SMAJ series is engineered for surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, high surge immunity, and AEC-Q101 readiness are mandatory.
FAQ
What is the breakdown voltage range of the SMAJ5.0-E3/5A?
The SMAJ5.0-E3/5A has a guaranteed breakdown voltage (VBR) range of 6.40 V to 7.82 V at a test current of 10 mA, measured per ANSI/IEEE C62.35 standards. This range reflects manufacturing tolerance and ensures consistent clamping behavior across units. The SMAJ5.0-E3/5A is unidirectional, with the cathode marked by a band, and its VBR is specified at 25 °C ambient with derating above that temperature.
Does the SMAJ5.0-E3/5A meet automotive qualification requirements?
No - the SMAJ5.0-E3/5A is commercial-grade (E3 suffix) and RoHS-compliant but not AEC-Q101 qualified. For automotive applications, Vishay specifies the SMAJ5.0AHE3/5A variant, which carries the HE3 suffix and is explicitly qualified to AEC-Q101. The SMAJ5.0-E3/5A shares identical electrical specs and DO-214AC packaging but lacks the extended reliability testing required for automotive use.
What is the maximum clamping voltage of the SMAJ5.0-E3/5A under surge conditions?
The SMAJ5.0-E3/5A clamps to a maximum of 9.6 V when subjected to its rated 41.7 A peak pulse current (IPPM) using the standardized 10/1000 µs double-exponential waveform. This value is measured at TA = 25 °C on recommended 0.2" × 0.2" copper pads. The SMAJ5.0-E3/5A maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), with minor derating above 25 °C per Figure 2 in the datasheet.
Can the SMAJ5.0-E3/5A be used in bi-directional protection circuits?
No - the SMAJ5.0-E3/5A is a unidirectional TVS diode, intended for DC rail protection where polarity is fixed. For bi-directional applications (e.g., AC lines or differential buses), Vishay offers the SMAJ5.0CA-E3/5A variant, which features symmetrical breakdown in both directions and no polarity marking. Using the SMAJ5.0-E3/5A in reverse-biased configurations risks permanent failure due to lack of reverse avalanche capability.
What is the thermal resistance and how does it affect PCB layout for the SMAJ5.0-E3/5A?
The SMAJ5.0-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard JEDEC test conditions and directly impacts surge repetition rate capability: larger copper areas or internal planes reduce RθJA, allowing higher duty-cycle operation. The SMAJ5.0-E3/5A must be placed with adequate thermal relief to avoid exceeding its 150 °C max junction temperature during repeated surges.
SMAJ5.0-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:
- 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-E3/5A FAQ
1.How can I place an order for SMAJ5.0-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0-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 SMAJ5.0-E3/5A reliable?
The price and inventory of SMAJ5.0-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 SMAJ5.0-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ5.0-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0-E3/5A?
SMAJ5.0-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0-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 SMAJ5.0-E3/5A?
For technical support, including SMAJ5.0-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0-E3/5A requirements.
6.How does Aetrix verify that SMAJ5.0-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0-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 SMAJ5.0-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ5.0-E3/5A?
All SMAJ5.0-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0-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 SMAJ5.0-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ5.0-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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