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Vishay General Semiconductor - Diodes Division SMAJ5.0CAHM3_A/I
- Part No.:
- SMAJ5.0CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0CAHM3_A/I.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,280
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Product details
Overview
SMAJ5.0CAHM3_A/I 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 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.
For engineers reviewing the SMAJ5.0CAHM3_A/I datasheet, SMAJ5.0CAHM3_A/I pinout, SMAJ5.0CAHM3_A/I application, or SMAJ5.0CAHM3_A/I equivalent, key selection considerations include bidirectional clamping symmetry, low clamping ratio (VC/VWM ≈ 1.84), AEC-Q101 qualification status, halogen-free RoHS compliance, and compatibility with automated SMT placement on consumer, automotive, and industrial PCBs.
Technical Context
This device functions as a voltage-clamped shunt protector: under normal operation it presents high impedance (<1 μA leakage at 5.0 V), but triggers into low-impedance conduction when transients exceed its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and fast response (<1 ns), critical for safeguarding sensitive IC inputs and MOSFET gates.
The SMAJ5.0CAHM3_A/I is rated for 400 W peak pulse power (10/1000 μs waveform) up to 78 V, derating to 300 W above that; its thermal resistance (RθJA = 120 °C/W) and 3.3 W steady-state power dissipation support reliable operation on standard 0.2" × 0.2" copper pads without forced cooling.
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 / 7.25 V - Breakdown occurs within this range at 10 mA test current; ensures predictable turn-on across temperature and lot variation. |
| VC @ IPPM | 9.2 V at 43.5 A - Clamped voltage during 10/1000 μs surge; limits downstream stress to ≤9.2 V even under 43.5 A transient. |
| PPPM | 400 W - Peak surge energy handling capability (10/1000 μs); sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges. |
| ID @ VWM | 800 μA max - Reverse leakage at 5.0 V; low enough to avoid signal distortion or bias shift in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with J-STD-020 MSL level 1 reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts during positive-going surges relative to cathode; symmetric with cathode for bidirectional clamping. |
| Cathode | Transient current entry (negative half-cycle) | Conducts during negative-going surges relative to anode; identical electrical behavior to anode due to bidirectional design. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC performance in both polarities-enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD-supports use in ADAS sensors, infotainment, and body control modules. |
| Halogen-free & RoHS | HM3 suffix denotes halogen-free molding compound and full RoHS compliance-meets EU ELV and China RoHS requirements for green manufacturing. |
| 400 W surge rating | Handles 10/1000 μs transients up to 43.5 A-provides margin against ISO 7637-2 pulse 1/2a/3a and IEC 61000-4-4 EFT events in 12 V systems. |
| Low clamping ratio | VC/VWM = 1.84 (9.2 V / 5.0 V)-minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices. |
Applications
| Automotive Sensor Protection | USB 2.0 Data Line Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector interface, clamping surges before they reach signal conditioning circuitry. Use Value: Prevents latch-up or permanent damage to 5 V-tolerant microcontrollers and ADC front-ends by limiting transient voltage to ≤9.2 V. |
Use Scenario: Safeguarding USB 2.0 D+ and D− lines against ESD (±15 kV contact) and system-level surges in portable docking stations and automotive USB hubs. IC Role / Device Role / Timing Role: Bidirectional TVS placed in series with each data line, leveraging symmetrical clamping to preserve differential signaling integrity. Use Value: Maintains signal rise/fall times (capacitance not specified but typical SMAJ <50 pF) while suppressing transients that would otherwise corrupt packet transmission. |
| Industrial PLC I/O Protection | Consumer Appliance Motor Control |
|
Use Scenario: Guarding 24 V digital input channels on programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated protector mounted at terminal block entry point, absorbing energy before it propagates into optocoupler or Schmitt-trigger input stages. Use Value: Enables >100,000 surge cycles without degradation due to glass-passivated junction and 150 °C TJ rating-reducing field failure rates in factory automation. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers in washing machine/microwave motor inverters from commutation spikes and EMI coupling. IC Role / Device Role / Timing Role: Low-leakage (≤800 μA) clamp on 5 V logic rails and MOSFET gate paths, activated only during >6.4 V excursions. Use Value: Eliminates need for external RC snubbers or Zener stacks-reducing BOM count while meeting IEC 61000-4-2 Level 4 ESD immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0CAHE3_A/I | Same electrical specs, but RoHS-compliant without halogen-free compound; non-AEC-Q101 rated. | Approved for commercial/industrial use only; not qualified for automotive under-hood deployment. | Select when halogen content is unrestricted and automotive qualification is unnecessary. |
| SMBJ5.0CAHM3_A/I | Same VWM/VBR/VC, but SMB (DO-214AA) package: 5.28 mm × 4.50 mm vs. SMA's 4.50 mm × 3.99 mm; 600 W PPPM rating. | Higher surge capacity suits harsher environments (e.g., telecom power feeds); larger footprint may limit layout density. | Choose when 600 W surge margin is required and PCB space allows SMB outline. |
Compared with SMAJ5.0CAHE3_A/I, the SMAJ5.0CAHM3_A/I adds halogen-free compliance and AEC-Q101 qualification for automotive use; versus SMBJ5.0CAHM3_A/I, it trades 200 W surge headroom for smaller SMA footprint-making it optimal for space-constrained, automotive-grade 5 V rail protection.
Availability
SMAJ5.0CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, USB 2.0 data line protection, and industrial PLC I/O requiring stable component supply with guaranteed long-term sourcing and consistent halogen-free material compliance.
Supply support for SMAJ5.0CAHM3_A/I 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in automotive, industrial, and computing systems-delivering precise clamping, low leakage, and robust surge endurance in compact surface-mount packages.
FAQ
What is the maximum clamping voltage of the SMAJ5.0CAHM3_A/I under a 10/1000 μs surge?
The SMAJ5.0CAHM3_A/I clamps to a maximum of 9.2 V when subjected to its rated peak pulse current of 43.5 A (10/1000 μs waveform). This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88390, Rev. 09-Jan-2024) and represents the upper bound of voltage seen by protected circuitry during worst-case surge events.
Is the SMAJ5.0CAHM3_A/I suitable for automotive applications?
Yes, the SMAJ5.0CAHM3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3_A/I" and documentation in the SMAJ5.0A–SMAJ188CA datasheet. It meets automotive reliability requirements including temperature cycling, high-temperature reverse bias, and ESD testing-making it appropriate for engine control units, ADAS sensors, and body electronics.
Does the SMAJ5.0CAHM3_A/I have polarity markings on the package?
No, the SMAJ5.0CAHM3_A/I is a bidirectional TVS diode and carries no polarity marking on the SMA (DO-214AC) package. Unlike unidirectional variants (e.g., SMAJ5.0A), it functions identically in both directions-eliminating orientation concerns during automated placement and simplifying PCB layout.
What is the reverse leakage current specification for the SMAJ5.0CAHM3_A/I at its stand-off voltage?
At the 5.0 V stand-off voltage (VWM), the SMAJ5.0CAHM3_A/I exhibits a maximum reverse leakage current (ID) of 800 μA, measured at TA = 25 °C. This low leakage ensures minimal impact on high-impedance signal paths and battery-powered circuits where quiescent current must be tightly controlled.
How does the SMAJ5.0CAHM3_A/I differ from the SMAJ5.0A variant?
The SMAJ5.0CAHM3_A/I is bidirectional with symmetric clamping in both polarities, whereas the SMAJ5.0A is unidirectional and features a cathode band marking. Electrically, the SMAJ5.0CAHM3_A/I has identical VWM (5.0 V) and VC (9.2 V), but supports AC-coupled or floating-line protection without polarity constraints-critical for USB, RS-485, and Ethernet PHY interfaces.
SMAJ5.0CAHM3_A/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ5.0CAHM3_A/I FAQ
1.How can I place an order for SMAJ5.0CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0CAHM3_A/I 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 SMAJ5.0CAHM3_A/I reliable?
The price and inventory of SMAJ5.0CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ5.0CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ5.0CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0CAHM3_A/I?
SMAJ5.0CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0CAHM3_A/I 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 SMAJ5.0CAHM3_A/I?
For technical support, including SMAJ5.0CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0CAHM3_A/I requirements.
6.How does Aetrix verify that SMAJ5.0CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0CAHM3_A/I 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 SMAJ5.0CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ5.0CAHM3_A/I?
All SMAJ5.0CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0CAHM3_A/I, 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 SMAJ5.0CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ5.0CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ5.0CAHM3_A/I Tags
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