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Vishay General Semiconductor - Diodes Division SMBJ5.0CAHM3_A/I
- Part No.:
- SMBJ5.0CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ5.0CAHM3_A/I.pdf
- Description:
- TVS DIODE 5VWM 9.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,051
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Product details
Overview
SMBJ5.0CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features 5.0 V stand-off voltage (VWM), 6.4–7.07 V breakdown voltage (VBR) at 10 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤9.2 V at 65.2 A peak surge current - deployed in sensor interface protection and DC power rail conditioning.
For engineers reviewing the SMBJ5.0CAHM3_A/I datasheet, SMBJ5.0CAHM3_A/I pinout, SMBJ5.0CAHM3_A/I application, or SMBJ5.0CAHM3_A/I equivalent, this device is selected for robust ESD and lightning surge immunity in automotive-grade industrial sensors, USB/RS-485 line protection, and low-voltage DC-DC converter input stages where bidirectional clamping and AEC-Q101 qualification are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable VBR tolerance (±5% typical), low leakage (<800 µA at VWM), and fast response time (<1.0 ns) to transient events such as EFT, ESD, and inductive switching spikes.
The device is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance (RθJA = 100 °C/W) supports operation on standard 0.2" × 0.2" copper pads without heatsinking in intermittent surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below system supply rails. |
| VBR min/max | 6.4 V / 7.07 V at 10 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events without premature conduction. |
| VC @ IPPM | ≤9.2 V at 65.2 A - Clamping voltage under 10/1000 µs surge; limits downstream IC stress to sub-10 V during 600 W transient absorption. |
| PPPM | 600 W - Peak pulse power handling capability with 0.01% duty cycle; enables protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤800 µA - Reverse leakage current at rated stand-off voltage; ensures minimal quiescent power loss in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and industrial ambient environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 3.94 mm footprint and 2.20 mm height; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals with cathode/anode indistinguishable in layout. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction in PCB layout. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line pair (e.g., RS-485 A/B). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential or AC-coupled signal lines without polarity constraints - e.g., CAN bus, USB D+/D−, Ethernet PHY pairs. |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces where reliability under thermal cycling and vibration is mandatory. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 4th-level surge (4 kV line-to-earth, 2 kV line-to-line) without degradation when mounted per spec pad layout. |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with JEDEC J-STD-201 Class 2 whisker resistance and EU RoHS Directive 2011/65/EU, supporting green manufacturing requirements. |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes voltage overshoot during transients - critical for protecting 5 V logic interfaces and microcontroller I/O pins with tight absolute maximum ratings. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Communication |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and MCU ADC input to clamp transients before they reach precision front-end circuitry. Use Value: Limits induced voltage to ≤9.2 V during 65.2 A surge, preserving ADC reference integrity and preventing latch-up in 5 V-tolerant microcontrollers. |
Use Scenario: Shielding RS-485 transceiver (e.g., SN65HVD230) data lines in factory automation PLCs subject to ground loop surges and EFT bursts. IC Role / Device Role / Timing Role: Placed across differential A/B lines to suppress common-mode transients while maintaining signal integrity up to 10 Mbps. Use Value: Symmetrical clamping prevents false triggering due to polarity reversal; 600 W rating sustains repeated 10/1000 µs surges without parameter shift. |
| USB 2.0 Port Protection | DC-DC Converter Input Stage |
|
Use Scenario: Safeguarding upstream USB ports on embedded host controllers against ESD (IEC 61000-4-2 ±15 kV contact) and hot-plug voltage spikes. IC Role / Device Role / Timing Role: Connected between D+ and D− lines to absorb bidirectional ESD events without affecting 480 Mbps signaling eye diagram. Use Value: Sub-10 V clamping ensures USB PHY transceivers remain within absolute maximum VI/O ratings; <800 µA leakage avoids bus pull-down issues. |
Use Scenario: Guarding 5 V input of buck converter (e.g., TPS54332) in IoT edge node power supplies against 12 V rail collapse transients. IC Role / Device Role / Timing Role: Mounted between VIN and GND to shunt inductive kickback from upstream switchers or relay coils. Use Value: 6.4–7.07 V VBR ensures clamping initiates before 5 V LDO or controller overvoltage lockout triggers, avoiding brownout resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0CAHE3_A/I | RoHS-compliant but not halogen-free; same VWM, VBR, PPPM, and package as SMBJ5.0CAHM3_A/I. | Lacks halogen-free certification; suitable for commercial-grade designs where JEDEC J-STD-201 Class 2 whisker resistance is not mandated. | Select SMBJ5.0CAHE3_A/I when halogen-free material is not required and cost optimization is prioritized. |
| SMCJ5.0CAHM3_A/I | Same electrical specs but in larger SMC (DO-214AB) package; 1500 W PPPM rating vs. 600 W; RθJA = 40 °C/W. | Higher surge capacity and lower thermal resistance support higher-reliability industrial power supplies with frequent surge exposure. | Choose SMCJ5.0CAHM3_A/I when system-level surge testing exceeds IEC 61000-4-5 Level 4 or when board space allows larger footprint. |
Compared with SMBJ5.0CAHE3_A/I, the SMBJ5.0CAHM3_A/I adds halogen-free compliance for stricter environmental programs; versus SMCJ5.0CAHM3_A/I, it trades surge margin and thermal performance for compact SMB footprint - ideal for space-constrained sensor nodes and USB peripherals.
Availability
SMBJ5.0CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, USB 2.0 port protection, and DC-DC converter input stages requiring stable component supply with AEC-Q101 qualification and halogen-free materials.
Supply support for SMBJ5.0CAHM3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBJ series targets high-volume, space-sensitive transient suppression in automotive, industrial, and communications systems - engineered for rapid response, repeatable clamping, and long-term stability under thermal and surge stress.
FAQ
What does the "HM3" suffix indicate in SMBJ5.0CAHM3_A/I?
The "HM3" suffix in SMBJ5.0CAHM3_A/I denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-201 Class 2 whisker resistance requirements. It also signifies AEC-Q101 qualification for automotive use, distinguishing it from commercial-grade E3 variants. This makes SMBJ5.0CAHM3_A/I suitable for safety-critical and environmentally regulated applications where material content and reliability are tightly controlled.
Is SMBJ5.0CAHM3_A/I unidirectional or bidirectional?
SMBJ5.0CAHM3_A/I is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number and verified in Vishay's datasheet Section 1 ("DEVICES FOR BIDIRECTION APPLICATIONS"). Electrical characteristics - including VBR, VC, and IPPM - apply identically in both directions, enabling symmetric transient suppression across differential or AC-coupled signal paths without polarity concerns during layout.
What is the maximum clamping voltage of SMBJ5.0CAHM3_A/I under surge conditions?
The maximum clamping voltage (VC) of SMBJ5.0CAHM3_A/I is 9.2 V at 65.2 A peak pulse current (IPPM), tested with a 10/1000 µs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range and ensures downstream 5 V logic circuits remain within absolute maximum voltage ratings during transient events - a key design parameter validated in Vishay Document Number 88392, Table on page 2.
Can SMBJ5.0CAHM3_A/I replace SMBJ5.0A in a design?
No - SMBJ5.0CAHM3_A/I is bidirectional, whereas SMBJ5.0A is unidirectional. Their VBR ranges differ: SMBJ5.0A has VBR = 6.4–7.07 V (unidirectional only), while SMBJ5.0CAHM3_A/I maintains identical VBR in both directions. Substituting SMBJ5.0CAHM3_A/I for SMBJ5.0A may cause unintended conduction on negative transients in DC-biased circuits, risking latch-up or damage. Always verify polarity requirements before replacement.
What is the thermal resistance of SMBJ5.0CAHM3_A/I, and how does it affect layout?
SMBJ5.0CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's mechanical drawing on page 5. Larger copper areas or internal planes reduce RθJA, improving surge endurance; insufficient copper increases junction temperature rise and may derate peak pulse power per Figure 2 in the datasheet.
SMBJ5.0CAHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 65.2A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
SMBJ5.0CAHM3_A/I FAQ
1.How can I place an order for SMBJ5.0CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ5.0CAHM3_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 SMBJ5.0CAHM3_A/I reliable?
The price and inventory of SMBJ5.0CAHM3_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 SMBJ5.0CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ5.0CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ5.0CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ5.0CAHM3_A/I?
SMBJ5.0CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ5.0CAHM3_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 SMBJ5.0CAHM3_A/I?
For technical support, including SMBJ5.0CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ5.0CAHM3_A/I requirements.
6.How does Aetrix verify that SMBJ5.0CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ5.0CAHM3_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 SMBJ5.0CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ5.0CAHM3_A/I?
All SMBJ5.0CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ5.0CAHM3_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 SMBJ5.0CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ5.0CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ5.0CAHM3_A/I Tags
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