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Vishay General Semiconductor - Diodes Division SMAJ5.0CA-E3/5A
- Part No.:
- SMAJ5.0CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0CA-E3/5A.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ5.0CA-E3/5A 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), 6.40–7.07 V breakdown voltage (VBR) at 10 mA, 400 W peak pulse power (10/1000 μs), and clamps to ≤9.2 V at 43.5 A peak surge current - protecting ICs, MOSFETs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ5.0CA-E3/5A datasheet, SMAJ5.0CA-E3/5A pinout, SMAJ5.0CA-E3/5A application, or SMAJ5.0CA-E3/5A equivalent, key selection criteria include bidirectional clamping capability, 9.2 V max clamping voltage at rated IPPM, RoHS-compliant matte tin terminals, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (6.40–7.07 V), ID ≤800 μA at VWM = 5.0 V, and VC ≤9.2 V at IPPM = 43.5 A under 10/1000 μs waveform. Its glass-passivated junction ensures stable avalanche performance and low incremental surge resistance.
Thermal design relies on RθJA = 120 °C/W (typ.) and RθJL = 30 °C/W (typ.), requiring PCB copper pad area per datasheet recommendation (0.2" × 0.2") to sustain 400 W pulse rating. The device is rated for TJ = –55 °C to +150 °C and qualified to AEC-Q101 when ordered with HE3/HM3 suffixes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 6.40 V / 7.07 V at IT = 10 mA - guaranteed avalanche initiation window for reliable transient detection |
| VC @ IPPM | ≤9.2 V at 43.5 A - clamped voltage during 400 W 10/1000 μs surge, defining protected circuit's worst-case overvoltage |
| PPPM | 400 W (10/1000 μs) - peak transient energy absorption capacity with 0.01% duty cycle derating above 25 °C |
| ID @ VWM | ≤800 μA - leakage current level ensuring minimal standby power loss and signal integrity on low-current lines |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height |
| Operating Temp | –55 °C to +150 °C - supports under-hood automotive and industrial environments without derating |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Transient current entry (positive half-cycle) | Conducts surge current into device during positive voltage excursion; tied to protected line |
| Cathode (Terminal 2) | Transient current entry (negative half-cycle) | Conducts surge current into device during negative voltage excursion; tied to protected line |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on properly laid out PCBs with recommended copper pads |
| Low clamping voltage (VC ≤ 9.2 V) | Protects 5 V logic interfaces (e.g., CAN, RS-485, sensor analog outputs) without violating absolute maximum ratings |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to shunt transients before reaching ADC input or signal conditioner. Use Value: Clamps induced spikes to ≤9.2 V, preserving 12-bit ADC accuracy and preventing latch-up in downstream op-amps. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs against ESD and inductive switching noise from solenoid drivers. IC Role / Device Role / Timing Role: TVS mounted across A/B bus lines near transceiver IC to suppress common-mode surges up to ±4 kV (IEC 61000-4-4). Use Value: Limits bus voltage excursions to within RS-485 common-mode range (–7 V to +12 V), avoiding receiver saturation or false edge detection. |
| Consumer USB Port ESD Protection | Power Supply Input Clamp |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D– lines in set-top boxes and smart displays, complementing primary polymer-based TVS. IC Role / Device Role / Timing Role: Fast-response silicon TVS placed after series impedance to clamp CDM and HBM events below 15 kV. Use Value: Sub-1 ns response time and ≤9.2 V clamping prevent damage to USB PHY transceivers while maintaining signal rise/fall times. |
Use Scenario: Input-stage transient suppression on 5 V DC-DC converter inputs subjected to hot-swap and backfeed events in telecom power modules. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing 400 W surges before upstream fuse or controller IC sees overvoltage. Use Value: Withstands 43.5 A peak current without degradation, enabling robust 5 V rail operation even during 100 ms input faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A-E3/5A | Unidirectional; cathode band marked; VF = 3.5 V at 25 A forward conduction | Requires correct polarity placement; unsuitable for AC or floating lines | Select only when protecting DC rails with known polarity and where forward conduction may be required |
| SMBJ5.0CA-E3/52 | Same VWM/VBR/VC specs but in SMB (DO-214AA) package; 600 W PPPM rating; larger 7.0 mm × 6.2 mm footprint | Higher power handling but requires more PCB area; less suitable for space-constrained layouts | Choose when system-level surge requirements exceed 400 W or thermal margin is critical |
Compared with SMAJ5.0A-E3/5A, the unidirectional variant demands strict polarity alignment and lacks AC-line compatibility; compared with SMBJ5.0CA-E3/52, the SMAJ5.0CA-E3/5A trades 200 W pulse headroom for 30% smaller board area and identical clamping performance at 5 V systems.
Availability
SMAJ5.0CA-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, consumer USB ports, and 5 V DC-DC input stages requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ5.0CA-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, TVS devices, and power MOSFETs for high-reliability applications.
The SMAJ series is engineered for robust transient suppression in automotive, industrial, and communications equipment - emphasizing low clamping voltage, repeatable surge endurance, and AEC-Q101 qualification readiness.
FAQ
What does the "CA" suffix mean in SMAJ5.0CA-E3/5A?
The "CA" suffix denotes a bidirectional configuration: SMAJ5.0CA-E3/5A provides symmetrical clamping for both positive and negative voltage transients, with identical breakdown and clamping characteristics in either polarity. Unlike unidirectional variants (e.g., SMAJ5.0A), it has no cathode band marking and is used where signal lines lack defined DC bias or operate AC-coupled - such as RS-485 buses or sensor differential pairs. This makes SMAJ5.0CA-E3/5A ideal for protecting balanced interfaces without polarity constraints.
What is the maximum clamping voltage of SMAJ5.0CA-E3/5A at its rated surge current?
The maximum clamping voltage (VC) of SMAJ5.0CA-E3/5A is 9.2 V, measured at its peak pulse current (IPPM) of 43.5 A under the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across temperature and production lot, ensuring that any transient event delivering up to 400 W of surge energy will not expose downstream components to more than 9.2 V - a critical parameter for safeguarding 5 V logic families, microcontrollers, and analog front-ends. The SMAJ5.0CA-E3/5A achieves this with low incremental surge resistance and fast avalanche response.
Is SMAJ5.0CA-E3/5A suitable for automotive applications?
SMAJ5.0CA-E3/5A meets commercial-grade specifications and is RoHS-compliant with matte tin terminals, but it is not AEC-Q101 qualified in the E3/5A configuration. For automotive use, Vishay offers the SMAJ5.0CAHE3_A/I variant (with HE3 suffix), which undergoes full AEC-Q101 stress testing including temperature cycling, humidity bias HAST, and ESD. While SMAJ5.0CA-E3/5A may function in non-safety-critical automotive subsystems (e.g., infotainment USB ports), designers targeting ASIL-B or higher must specify the HE3- or HM3-suffixed versions. Always verify qualification status via the full ordering code.
How does the SMA (DO-214AC) package of SMAJ5.0CA-E3/5A affect thermal performance?
The SMA (DO-214AC) package of SMAJ5.0CA-E3/5A delivers RθJA = 120 °C/W (typ.) and RθJL = 30 °C/W (typ.), meaning effective heat dissipation depends heavily on PCB layout. To achieve the full 400 W peak pulse rating, Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - doubling pad area reduces RθJA by ~25%. Without adequate copper, thermal derating applies per Figure 2 in the datasheet. The SMAJ5.0CA-E3/5A's compact 4.50 mm × 5.28 mm footprint enables dense routing while maintaining sufficient thermal path for most industrial and consumer applications.
Can SMAJ5.0CA-E3/5A replace SMAJ5.0A-E3/5A in an existing design?
No - SMAJ5.0CA-E3/5A cannot directly replace SMAJ5.0A-E3/5A without layout review. Although both share identical VWM (5.0 V), VBR (6.40–7.07 V), and VC (≤9.2 V), SMAJ5.0A-E3/5A is unidirectional and requires correct cathode orientation; reversing it causes open-circuit failure. SMAJ5.0CA-E3/5A is bidirectional and polarity-agnostic. Swapping them introduces risk of misplacement or unintended forward conduction in DC circuits. If replacing, confirm signal line biasing, validate clamping symmetry, and verify no forward-bias conditions exist - otherwise retain SMAJ5.0A-E3/5A for unidirectional rails and use SMAJ5.0CA-E3/5A only where true bidirectional protection is needed.
SMAJ5.0CA-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:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ5.0CA-E3/5A FAQ
1.How can I place an order for SMAJ5.0CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0CA-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 SMAJ5.0CA-E3/5A reliable?
The price and inventory of SMAJ5.0CA-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 SMAJ5.0CA-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ5.0CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0CA-E3/5A?
SMAJ5.0CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0CA-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 SMAJ5.0CA-E3/5A?
For technical support, including SMAJ5.0CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0CA-E3/5A requirements.
6.How does Aetrix verify that SMAJ5.0CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0CA-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 SMAJ5.0CA-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ5.0CA-E3/5A?
All SMAJ5.0CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0CA-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 SMAJ5.0CA-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ5.0CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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