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Vishay General Semiconductor - Diodes Division SMAJ5.0CA-E3/61
- Part No.:
- SMAJ5.0CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0CA-E3/61.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ5.0CA-E3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust ESD and surge protection on signal/power lines. It features a 5.0 V stand-off voltage (VWM), 6.40–7.25 V breakdown range (VBR), 400 W peak pulse power (10/1000 μs), clamping voltage of 9.2 V at 43.5 A, and operates across –55 °C to +150 °C junction temperature - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMAJ5.0CA-E3/61 datasheet, SMAJ5.0CA-E3/61 pinout, SMAJ5.0CA-E3/61 application, or SMAJ5.0CA-E3/61 equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VBR ≈ 1.33), MSL Level 1 reflow compatibility, AEC-Q101 qualification eligibility (via HE3 suffix), and 800 μA max reverse leakage at VWM.
Technical Context
This device functions as a voltage-clamped shunt protector: under normal operation it presents high impedance (<800 μA leakage at 5.0 V), but triggers into low-impedance conduction when transients exceed its 6.40–7.25 V breakdown threshold. Its bidirectional architecture ensures symmetrical clamping in both polarities without polarity marking.
It delivers 400 W peak pulse power handling per 10/1000 μs waveform (derated to 300 W above 78 V), with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W - enabling reliable operation on standard 0.2" × 0.2" copper pads without heatsinking in most board-level applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - maximum continuous reverse operating voltage before significant leakage; defines safe signal swing margin for 5 V logic/sensor lines. |
| VBR (min/max) | 6.40 V / 7.25 V - guaranteed breakdown onset range at 10 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 9.2 V at 43.5 A - clamped voltage during 400 W transient; limits downstream IC stress to <9.2 V during worst-case surge. |
| PPPM | 400 W (10/1000 μs) - standardized surge energy absorption capacity; supports IEC 61000-4-5 Level 3/4 compliance with proper layout. |
| ID @ VWM | 800 μA max - ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max. | +150 °C - enables deployment in under-hood automotive environments and industrial enclosures without derating. |
| Package | SMA (DO-214AC) - surface-mount, low-profile (2.54 mm lead pitch), RoHS-compliant, MSL Level 1 (260 °C peak reflow). |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; bidirectional construction means no cathode/anode marking - terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as input/output for transient suppression; no polarity dependency - connects across protected line and ground or differential pair. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamp path - used for line-to-line or line-to-ground protection without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded lines without polarity concerns. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 4 kV surge (line-earth) and ISO 7637-2 Pulse 1/2a/3a in automotive ECUs when mounted per recommended pad layout. |
| Low clamping voltage (9.2 V) | Provides 4.2 V headroom below typical 13.5 V automotive supply rail - protects 5 V microcontrollers and CAN transceivers from overvoltage damage. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without moisture-induced popcorn failure - eliminates bake-out requirement. |
| AEC-Q101 qualification option | HE3/HM3 variants meet automotive reliability standards for temperature cycling, HTRB, and surge endurance - validated for engine control and ADAS modules. |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 0–5 V throttle position sensor) from load dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Shunt TVS diode placed between signal line and chassis ground, clamping transients within nanoseconds. Use Value: Limits voltage excursion to ≤9.2 V during 400 W surges, preventing ADC saturation and op-amp latch-up in MCU front-end circuitry. |
Use Scenario: Safeguarding RS-485 transceiver data lines against ESD (±15 kV contact) and lightning-induced surges in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional line-to-line suppressor across A/B differential pair, absorbing common-mode and differential transients. Use Value: Maintains signal integrity by clamping differential spikes to <18.4 V while adding <0.5 pF capacitance - no data rate degradation at 10 Mbps. |
| Consumer USB Port Protection | Telecom Power Rail Clamp |
|
Use Scenario: ESD protection on USB 2.0 D+/D− lines in portable devices exposed to human-body-model discharges. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector, shunting ESD current to ground. Use Value: Responds in <1 ns to ±8 kV HBM events, limiting voltage to <9.2 V without distorting 480 Mbps data eye due to minimal junction capacitance. |
Use Scenario: Secondary overvoltage clamp on +5 V telecom power distribution network feeding FPGA and PHY ICs. IC Role / Device Role / Timing Role: Standby-mode shunt protector activated only during overvoltage faults (>7.25 V), minimizing quiescent loss. Use Value: Draws <800 μA at nominal 5.0 V, eliminating need for series resistors or active supervision - reduces BOM count and standby power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0CA-E3/52 | Same VWM/VBR/VC specs but in larger SMB (DO-214AA) package; 600 W PPPM rating; RθJA = 85 °C/W. | Better thermal performance and higher surge margin; requires larger PCB footprint and higher assembly cost. | Select when system-level surge testing exceeds 400 W or ambient temperatures exceed 105 °C. |
| 1.5SMC5.0CA | Same electrical specs but in SMC (DO-214AB) package; 1500 W PPPM; RθJA = 50 °C/W; higher VF in forward conduction. | Designed for high-energy industrial mains protection; not optimized for space-constrained signal-line placement. | Choose for primary-side AC/DC input clamping where PCB area permits and >1 kW surge immunity is required. |
Compared with SMBJ5.0CA-E3/52 and 1.5SMC5.0CA, the SMAJ5.0CA-E3/61 offers optimal balance of compact size, 400 W capability, and low-cost manufacturability for secondary-side 5 V rail and signal-line protection - making it preferred for consumer, computing, and mid-tier automotive modules where footprint and reflow compatibility are critical.
Availability
SMAJ5.0CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O modules, consumer USB ports, and telecom power rail protection requiring stable component supply and full traceability.
Supply support for SMAJ5.0CA-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and AEC-Q qualification.
The SMAJ series is engineered for board-level transient suppression in harsh environments - targeting automotive, industrial, and communications systems where fast response, low clamping, and reflow-ready packaging are mandatory.
FAQ
What is the clamping voltage of SMAJ5.0CA-E3/61 and how does it protect downstream ICs?
The SMAJ5.0CA-E3/61 clamps transients to 9.2 V at 43.5 A (10/1000 μs waveform). This limits voltage seen by protected ICs - such as 5 V microcontrollers or CAN transceivers - to a safe level well below their absolute maximum ratings, preventing latch-up, gate oxide rupture, or permanent damage during surge events.
Is SMAJ5.0CA-E3/61 suitable for automotive applications?
Yes - the base SMAJ5.0CA-E3/61 meets commercial-grade requirements, and its AEC-Q101-qualified variant (SMAJ5.0CAHE3_A) is explicitly rated for automotive use. It withstands temperature cycling, high-temperature reverse bias, and surge endurance tests per AEC-Q101, making it appropriate for body control modules and sensor nodes.
Does SMAJ5.0CA-E3/61 have polarity markings, and how is it installed on PCB?
No - SMAJ5.0CA-E3/61 is bidirectional and has no cathode band or polarity marking. It is installed symmetrically across the protected line and ground (or between differential lines), with either terminal usable as input or return; orientation does not affect functionality.
What is the maximum reverse leakage current of SMAJ5.0CA-E3/61 at its stand-off voltage?
The SMAJ5.0CA-E3/61 exhibits ≤800 μA maximum reverse leakage current at its 5.0 V stand-off voltage (VWM) and 25 °C. This ultra-low leakage preserves signal fidelity in high-impedance sensor circuits and minimizes power drain in battery-powered applications.
Can SMAJ5.0CA-E3/61 be used in place of unidirectional TVS diodes like SMAJ5.0A-E3/61?
No - SMAJ5.0CA-E3/61 is bidirectional and lacks polarity; SMAJ5.0A-E3/61 is unidirectional with cathode marking. Substitution requires circuit review: bidirectional use is mandatory for AC or floating lines, while unidirectional types are needed for DC rails with defined ground reference and forward-bias constraints.
SMAJ5.0CA-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:
- 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-E3/61 FAQ
1.How can I place an order for SMAJ5.0CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0CA-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 SMAJ5.0CA-E3/61 reliable?
The price and inventory of SMAJ5.0CA-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 SMAJ5.0CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ5.0CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0CA-E3/61?
SMAJ5.0CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0CA-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 SMAJ5.0CA-E3/61?
For technical support, including SMAJ5.0CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0CA-E3/61 requirements.
6.How does Aetrix verify that SMAJ5.0CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0CA-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 SMAJ5.0CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ5.0CA-E3/61?
All SMAJ5.0CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0CA-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 SMAJ5.0CA-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ5.0CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ5.0CA-E3/61 Tags
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