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Vishay General Semiconductor - Diodes Division SMAJ5.0CAHE3/5A
- Part No.:
- SMAJ5.0CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0CAHE3/5A.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ5.0CAHE3/5A from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping ESD and surge transients on signal/power lines. It features 5.0 V stand-off voltage (VWM), 6.40–7.25 V breakdown range (VBR), 400 W peak pulse power (10/1000 μs), ≤9.2 V clamping voltage at 43.5 A IPPM, and AEC-Q101 qualification - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMAJ5.0CAHE3/5A datasheet, SMAJ5.0CAHE3/5A pinout, SMAJ5.0CAHE3/5A application, or SMAJ5.0CAHE3/5A equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.33), AEC-Q101 qualification status, RoHS-compliant HE3 suffix, and compatibility with 0.2" × 0.2" copper pad thermal layout per JEDEC standards.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias (≤5.0 V), it presents <800 μA reverse leakage; during transients exceeding VBR (6.40–7.25 V), it avalanches to clamp voltage ≤9.2 V at 43.5 A peak pulse current. Its glass-passivated junction enables sub-nanosecond response and stable surge handling across -55 °C to +150 °C junction temperature.
The device uses symmetrical bidirectional structure - no polarity marking - and achieves 0.057 %/°C VBR temperature coefficient. Thermal resistance is 120 °C/W (junction-to-ambient) on standard 0.2" × 0.2" pads, supporting repetitive surge duty cycle ≤0.01 % without derating below 78 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 5.0 V - maximum continuous reverse voltage before significant leakage; defines operating margin for 5 V logic/sensor rails. |
| VBR (Breakdown Voltage) | 6.40–7.25 V at 10 mA - guaranteed avalanche initiation range; ensures reliable turn-on before system damage threshold. |
| VC (Clamping Voltage) | ≤9.2 V at IPPM = 43.5 A - peak voltage seen by protected IC during 400 W transient; clamping ratio VC/VBR ≈ 1.33. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs waveform) - energy-handling capacity for lightning/inductive-switching surges per IEEE C62.35. |
| ID (Reverse Leakage) | ≤800 μA at VWM = 5.0 V - minimal loading on 5 V bus; preserves signal integrity and power efficiency. |
| TJ max. | +150 °C - supports under-hood automotive and industrial environments; enables operation without external heatsinking. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD22-A114. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | One terminal of symmetrical PN junction; conducts surge current in either direction when V > |VBR|. |
| Cathode | Transient current sink (bidirectional) | Second terminal of symmetrical PN junction; functionally identical to Anode; no band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN, RS-485, sensor bridges) without polarity concerns. |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 (4 kV surge) and ISO 7637-2 Pulse 1/2b transients on 5 V rails with margin. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics per stress test requirements. |
| Low clamping voltage (≤9.2 V) | Protects 5 V-tolerant ICs (e.g., microcontrollers, transceivers) with ≥0.8 V safety margin above VWM. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles; no moisture sensitivity handling required prior to assembly. |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay modules exposed to load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Shunt-type transient voltage suppressor placed directly at connector entry point, clamping surges before reaching ADC input or signal conditioner. Use Value: Maintains sensor signal fidelity by limiting transient overvoltage to ≤9.2 V, preventing latch-up or gate oxide damage in downstream 5 V rail ICs. |
Use Scenario: Safeguarding digital input channels of PLC modules connected to 24 V field wiring subject to inductive kickback and EFT bursts. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair or between signal and ground, absorbing ±1 kV EFT (IEC 61000-4-4) and ±2 kV ESD (IEC 61000-4-2). Use Value: Enables robust operation without signal distortion or false triggering, leveraging symmetrical clamping and <800 μA leakage at 5 V logic reference. |
| USB Data Line Protection | Consumer Device Power Rail |
|
Use Scenario: Guarding USB 2.0 D+/D− lines against ESD events during hot-plug insertion in automotive infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS mounted adjacent to USB connector, providing sub-ns response to ±8 kV contact discharge. Use Value: Preserves signal integrity up to 480 Mbps by limiting clamping overshoot to ≤9.2 V while adding <10 pF parasitic capacitance (typical). |
Use Scenario: Securing 5 V supply inputs of smart home hubs and IoT gateways against AC line-induced surges and lightning-induced coupling. IC Role / Device Role / Timing Role: Primary-level TVS on main 5 V rail, coordinated with upstream fuse and secondary filtering to absorb 400 W transients per UL 497B. Use Value: Extends product lifetime in unregulated AC environments by preventing cumulative degradation of DC-DC converters and LDOs downstream. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0CA-M3/5A | Halogen-free, RoHS-compliant, commercial-grade (non-AEC-Q101); identical electrical specs and package. | Not qualified for automotive use; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when halogen-free compliance is required and automotive qualification is unnecessary. |
| SMBJ5.0CAHE3/5A | Same VWM/VBR/VC ratings but in SMB (DO-214AA) package - 25 % larger footprint, 600 W PPPM rating. | Higher power handling supports harsher surge environments (e.g., telecom base stations); requires PCB layout change. | Choose when 600 W surge margin is needed and board space allows SMB footprint. |
Compared with SMAJ5.0CAHE3/5A, the M3/5A variant drops AEC-Q101 validation for halogen-free compliance, while SMBJ5.0CAHE3/5A trades compactness for 50 % higher surge power - both require explicit evaluation of thermal layout and qualification scope before substitution.
Availability
SMAJ5.0CAHE3/5A is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and consumer USB interface safeguarding requiring stable component supply and AEC-Q101 traceability.
Supply support for SMAJ5.0CAHE3/5A 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMAJ series delivers standardized TVS protection optimized for cost-sensitive, high-volume applications demanding AEC-Q101 qualification, low-profile packaging, and repeatable clamping performance across temperature.
FAQ
What is the clamping voltage of SMAJ5.0CAHE3/5A at its rated peak pulse current?
The SMAJ5.0CAHE3/5A exhibits a maximum clamping voltage (VC) of 9.2 V when subjected to its peak pulse current (IPPM) of 43.5 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees protection margin for 5 V systems, as VC remains well below typical IC absolute maximum ratings. The SMAJ5.0CAHE3/5A datasheet specifies this parameter at TA = 25 °C with recommended 0.2" × 0.2" copper pads.
Is SMAJ5.0CAHE3/5A suitable for automotive applications?
Yes, SMAJ5.0CAHE3/5A is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix, indicating RoHS-compliant construction and full stress-test validation per JESD22. It is deployed in engine control units, ADAS camera modules, and body electronics where transient immunity to ISO 7637-2 and IEC 61000-4-5 is mandatory. The SMAJ5.0CAHE3/5A meets these requirements without derating up to +150 °C junction temperature.
How does the bidirectional design of SMAJ5.0CAHE3/5A affect its circuit placement?
The SMAJ5.0CAHE3/5A has no polarity marking and functions identically in both directions, making it ideal for protecting AC-coupled signals, differential buses (e.g., CAN, RS-485), or floating sensor outputs where voltage polarity reversal may occur. Unlike unidirectional TVS diodes, the SMAJ5.0CAHE3/5A eliminates orientation errors during automated placement and avoids the need for dual-diode configurations. Its symmetrical VBR (6.40–7.25 V) ensures matched clamping in either direction.
What thermal considerations apply to SMAJ5.0CAHE3/5A in PCB layout?
SMAJ5.0CAHE3/5A requires minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its rated 400 W peak pulse power and 120 °C/W junction-to-ambient thermal resistance. Reducing pad area increases thermal impedance, causing junction temperature rise and potential derating of PPPM above 25 °C ambient. The SMAJ5.0CAHE3/5A datasheet specifies this layout in Figure 1 and Table "Maximum Ratings", and deviation voids the 400 W rating.
Does SMAJ5.0CAHE3/5A meet industry surge immunity standards?
Yes, SMAJ5.0CAHE3/5A is characterized per IEEE C62.35 and validated for IEC 61000-4-2 (±8 kV contact ESD), IEC 61000-4-4 (±2 kV EFT), and IEC 61000-4-5 (4 kV surge, 2 Ω source) when used with appropriate PCB layout. Its 400 W PPPM rating at 10/1000 μs aligns with Level 4 of IEC 61000-4-5, and its AEC-Q101 qualification confirms robustness against automotive-specific transients defined in ISO 7637-2. The SMAJ5.0CAHE3/5A meets UL 497B recognition for telecom and data line protectors.
SMAJ5.0CAHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ5.0CAHE3/5A FAQ
1.How can I place an order for SMAJ5.0CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0CAHE3/5A 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 SMAJ5.0CAHE3/5A reliable?
The price and inventory of SMAJ5.0CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ5.0CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ5.0CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0CAHE3/5A?
SMAJ5.0CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0CAHE3/5A 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 SMAJ5.0CAHE3/5A?
For technical support, including SMAJ5.0CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0CAHE3/5A requirements.
6.How does Aetrix verify that SMAJ5.0CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0CAHE3/5A 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 SMAJ5.0CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ5.0CAHE3/5A?
All SMAJ5.0CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0CAHE3/5A, 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 SMAJ5.0CAHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ5.0CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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