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Vishay General Semiconductor - Diodes Division SMAJ5.0A-E3/1
- Part No.:
- SMAJ5.0A-E3/1
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0A-E3/1.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,813
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Product details
Overview
SMAJ5.0A-E3/1 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 5.0 V stand-off voltage (VWM), 9.2 V maximum clamping voltage (VC) at 43.5 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform), making it suitable for IC, MOSFET, and sensor signal line protection in automotive and industrial systems.
For engineers reviewing the SMAJ5.0A-E3/1 datasheet, SMAJ5.0A-E3/1 pinout, SMAJ5.0A-E3/1 application, or SMAJ5.0A-E3/1 equivalent, key selection considerations include its unidirectional polarity, 6.40–7.07 V breakdown voltage range (VBR), 800 µA maximum reverse leakage at VWM, 150 °C maximum junction temperature, and RoHS-compliant matte tin-plated leads solderable per J-STD-002.
Technical Context
This TVS diode operates as a unidirectional clamping device with glass passivated chip junction and low incremental surge resistance, enabling fast response to transient overvoltages. Its electrical behavior is defined by precise VBR (6.40–7.07 V at 10 mA), VWM (5.0 V), and VC (9.2 V at 43.5 A), ensuring reliable protection without false triggering during normal operation.
The device is rated for 400 W peak pulse power (10/1000 µs) up to 78 V, derating above that threshold, and supports 40 A non-repetitive forward surge current (8.3 ms half-sine). Thermal performance is characterized by RθJA = 120 °C/W and RθJL = 30 °C/W, requiring appropriate PCB copper pad area (0.2 × 0.2 inch) for specified power handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR (min/max) | 6.40 V / 7.07 V at 10 mA - Breakdown voltage range ensures consistent turn-on under transient stress across production lots. |
| VC @ IPPM | 9.2 V at 43.5 A - Clamping voltage limits downstream component stress during 400 W surge events. |
| IPPM | 43.5 A - Peak pulse current capability with 10/1000 µs waveform; determines survivability of common lightning/ESD transients. |
| ID @ VWM | 800 µA - Reverse leakage at stand-off voltage; low enough to avoid signal integrity degradation in high-impedance circuits. |
| TJ max. | 150 °C - Maximum junction temperature enables operation in under-hood automotive and industrial environments. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with cathode band marking; compatible with automated placement and reflow. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, MSL Level 1 (JEDEC J-STD-020), 260 °C solder dip rated for 40 s. Cathode identified by a single band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (uni-directional) | Connected to protected circuit ground or low-side reference; conducts during positive transients when cathode is biased higher. |
| Cathode | Clamping node (marked with band) | Connected to protected signal line; clamps voltage to ≤9.2 V when transient exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3/4 surges without thermal runaway on standard PCB pads. |
| Glass passivated chip junction | Ensures stable VBR and low leakage over temperature and lifetime, critical for automotive-grade reliability. |
| MSL Level 1 moisture sensitivity | Eliminates bake requirements prior to reflow, reducing manufacturing cost and process complexity. |
| RoHS-compliant & JESD201 Class 1A whisker tested | Meets automotive electronics material compliance requirements and prevents tin whisker-induced short circuits. |
| Low profile DO-214AC footprint | Supports high-density PCB layouts while maintaining thermal dissipation via standardized 0.2 × 0.2 inch copper pads. |
Applications
| Automotive Sensor Signal Protection | Industrial PLC Input Stage |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive kickback in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and chassis ground, absorbing transients before they reach the IC input ESD structure. Use Value: Limits voltage seen by downstream transceiver to ≤9.2 V during 43.5 A surges, preventing latch-up or gate oxide damage in AEC-Q100 qualified components. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring transients and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated (5.0 V) clamping device mounted at connector interface, shunting surge energy to common ground before signal conditioning circuitry. Use Value: Maintains system uptime by surviving repetitive 400 W surges without degradation, validated per IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge). |
| Consumer Power Adapter Output | Telecom Ethernet PHY Interface |
Use Scenario: Secondary-side overvoltage suppression on 5 V USB-C PD adapter outputs exposed to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) unidirectional TVS placed between VBUS and GND, clamping spikes before reaching USB controller or load switch. Use Value: Achieves <10 ns response time and 9.2 V clamping to meet USB-IF compliance for 5 V rail integrity during 8 kV contact ESD. |
Use Scenario: Protecting 10/100/1000BASE-T Ethernet PHY differential pairs from lightning-induced common-mode surges entering via RJ45 magnetics. IC Role / Device Role / Timing Role: Discrete unidirectional TVS per line (TX+/TX−, RX+/RX−), referenced to isolated PHY ground to suppress asymmetrical transients. Use Value: Provides 43.5 A surge current capacity per line with <1 pF junction capacitance at 0 V, preserving signal integrity up to 100 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0AHE3/1 | AEC-Q101 qualified, high-reliability automotive grade; identical electrical specs but enhanced process control and screening. | Required for under-hood automotive ECUs; not necessary for commercial-grade consumer or industrial use. | Select SMAJ5.0AHE3/1 only when AEC-Q101 qualification is mandated by OEM specifications. |
| SMBJ5.0A-E3/52 | DO-214AA (SMB) package; same VWM/VC but lower 600 W peak power rating and higher thermal resistance (RθJA = 140 °C/W). | Better suited for space-constrained boards where 400 W is sufficient and larger SMA footprint is undesirable. | Choose SMBJ5.0A-E3/52 when board area is critical and surge duty cycle is low; SMAJ5.0A-E3/1 preferred for higher thermal margin. |
Compared with SMAJ5.0AHE3/1, the SMAJ5.0A-E3/1 offers identical clamping performance at lower cost and qualification burden, while SMBJ5.0A-E3/52 trades package size for reduced power handling-making SMAJ5.0A-E3/1 the optimal balance of surge robustness, manufacturability, and commercial-grade reliability.
Availability
SMAJ5.0A-E3/1 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, consumer power adapter outputs, and telecom Ethernet PHY protection requiring stable component supply across long-lifecycle programs.
Supply support for SMAJ5.0A-E3/1 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The SMAJ series was developed specifically for surface-mount transient suppression in harsh environments-including automotive, industrial, and telecom-balancing high surge capability, tight parametric tolerances, and JEDEC-standard packaging.
FAQ
What is the breakdown voltage range for SMAJ5.0A-E3/1?
The SMAJ5.0A-E3/1 has a guaranteed breakdown voltage (VBR) range of 6.40 V to 7.07 V at 10 mA test current, measured per ANSI/IEEE C62.35 standards. This tight tolerance ensures predictable clamping onset across temperature and production batches, directly supporting design margin calculations for 5 V systems. The SMAJ5.0A-E3/1 maintains this specification under TA = 25 °C conditions with full derating above that ambient.
Is SMAJ5.0A-E3/1 unidirectional or bidirectional?
SMAJ5.0A-E3/1 is a unidirectional Transient Voltage Suppressor, indicated by the absence of "C" or "CA" suffix and confirmed by its single cathode band marking. It conducts only during reverse-biased transients (anode grounded, cathode to protected line), unlike bidirectional variants such as SMAJ5.0CA which suppress both polarities. This makes SMAJ5.0A-E3/1 ideal for DC-biased signal lines like 5 V power rails or single-ended sensor outputs.
What is the maximum clamping voltage of SMAJ5.0A-E3/1 at rated surge current?
The SMAJ5.0A-E3/1 exhibits a maximum clamping voltage (VC) of 9.2 V when subjected to its rated 43.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on 0.2 × 0.2 inch copper pads and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events, directly determining downstream IC survivability.
Does SMAJ5.0A-E3/1 comply with automotive reliability standards?
The SMAJ5.0A-E3/1 is RoHS-compliant and meets JESD201 Class 1A whisker testing, but it is not AEC-Q101 qualified. For automotive applications requiring formal qualification, the pin-compatible SMAJ5.0AHE3/1 variant must be used instead. The SMAJ5.0A-E3/1 is rated for 150 °C maximum junction temperature and MSL Level 1, making it suitable for commercial and industrial automotive-adjacent systems where full AEC-Q101 is not mandated.
What package type does SMAJ5.0A-E3/1 use, and what are its mounting requirements?
SMAJ5.0A-E3/1 uses the DO-214AC (SMA) surface-mount package with matte tin-plated leads, compliant with J-STD-002 solderability standards. For rated 400 W pulse power, it requires 0.2 × 0.2 inch (5.0 × 5.0 mm) copper pads per terminal on FR-4 PCB. The cathode is marked by a single band, and the device must be mounted with correct polarity to ensure proper clamping function in the SMAJ5.0A-E3/1 circuit implementation.
SMAJ5.0A-E3/1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 43.5A
- 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)
SMAJ5.0A-E3/1 FAQ
1.How can I place an order for SMAJ5.0A-E3/1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0A-E3/1 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 SMAJ5.0A-E3/1 reliable?
The price and inventory of SMAJ5.0A-E3/1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ5.0A-E3/1 is usually 5 days.
3.What payment methods are accepted for SMAJ5.0A-E3/1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0A-E3/1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0A-E3/1?
SMAJ5.0A-E3/1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0A-E3/1 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 SMAJ5.0A-E3/1?
For technical support, including SMAJ5.0A-E3/1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0A-E3/1 requirements.
6.How does Aetrix verify that SMAJ5.0A-E3/1 is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0A-E3/1 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 SMAJ5.0A-E3/1 meets industry standards.
7.What is the process for return or replacement of SMAJ5.0A-E3/1?
All SMAJ5.0A-E3/1 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0A-E3/1, 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 SMAJ5.0A-E3/1 part is unused and in its original packaging.
Return procedure for SMAJ5.0A-E3/1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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