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Vishay General Semiconductor - Diodes Division SMBJ9.0CAHM3/I
- Part No.:
- SMBJ9.0CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ9.0CAHM3/I.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,375
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Product details
Overview
SMBJ9.0CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 9.0 V stand-off voltage (VWM), 15.4 V maximum clamping voltage (VC) at 39.0 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), making it suitable for protecting MOSFETs, sensor interfaces, and I/O lines in industrial and automotive electronics.
For engineers reviewing the SMBJ9.0CAHM3/I datasheet, SMBJ9.0CAHM3/I pinout, SMBJ9.0CAHM3/I application, or SMBJ9.0CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical breakdown behavior in both directions due to its bidirectional construction. Its glass-passivated junction ensures stable avalanche characteristics, while low incremental surge resistance (rd) enables consistent clamping performance under repetitive 10/1000 µs transients at 0.01% duty cycle.
The SMBJ9.0CAHM3/I exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation up to +150 °C junction temperature. Its halogen-free, RoHS-compliant construction (HM3 suffix) and AEC-Q101 qualification confirm suitability for automotive-grade designs requiring long-term reliability under thermal cycling and humidity exposure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 9.0 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 10.0–11.1 V at 1 mA - Ensures reliable turn-on during overvoltage events without premature conduction |
| VC (Clamping Voltage) | 15.4 V at 39.0 A - Limits downstream circuit voltage during 10/1000 µs surge, protecting 12 V rail components |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy transients such as ISO 7637-2 pulse 1/2a/5a without degradation |
| IPPM (Peak Pulse Current) | 39.0 A - Supports robust protection against 500 V/50 Ω surge generators per IEC 61000-4-5 |
| TJmax | +150 °C - Enables use in under-hood automotive environments and industrial enclosures with elevated ambient temperatures |
| MSL Level | Level 1 (per J-STD-020) - Allows unlimited floor life and standard reflow without baking preconditioning |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional clamping | Connected to protected line; conducts during negative transients relative to cathode reference |
| Cathode | Current exit terminal in forward bias; common node in bidirectional clamping | Connected to protected line; conducts during positive transients relative to anode reference |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 600 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial control interfaces |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including body electronics, infotainment, and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Complies with EU Directive 2011/65/EU and IPC-1752A material declaration requirements |
| Low profile SMB package | Reduces PCB footprint vs. SMA/SMB alternatives while maintaining thermal performance on 5.0 mm × 5.0 mm pads |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pairs or supply rails to limit transient excursions within IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to 12 V-rated transceivers by clamping surges to ≤15.4 V at 39 A, preserving signal integrity during ISO 7637-2 pulses. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input channel to shunt transient energy before reaching optocoupler or Schmitt-trigger input stages. Use Value: Maintains functional safety by limiting voltage overshoot to <16 V during 1 kV/500 Ω surge tests, ensuring uninterrupted state detection in SIL-2 compliant systems. |
| Consumer USB Port ESD Protection | Telecom Ethernet PHY Line Protection |
|
Use Scenario: Secondary-level surge suppression on USB 2.0 VBUS and D+/D− lines after primary ESD arrays, targeting higher-energy lightning-induced surges. IC Role / Device Role / Timing Role: Coordinated clamping device working with low-capacitance ESD diodes to handle both fast ESD (IEC 61000-4-2) and slower surges (IEC 61000-4-5). Use Value: Extends system-level surge withstand to 1.5 kV (line-earth) by absorbing residual energy that bypasses front-end ESD protection, reducing failure rate in ungrounded consumer devices. |
Use Scenario: Protecting 10/100/1000BASE-T Ethernet PHY transformers and magnetics from induced surges on outdoor or building-entry cabling. IC Role / Device Role / Timing Role: Common-mode TVS across transformer center taps or differential pairs to suppress longitudinal surges without distorting high-speed signaling. Use Value: Clamps common-mode transients to <20 V while adding <0.5 pF parasitic capacitance, preserving signal integrity up to 100 MHz and meeting IEEE 802.3af PoE surge requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CAHE3/I | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial-grade industrial controls where automotive qualification is unnecessary | Select when cost optimization is prioritized over halogen-free compliance or automotive validation |
| SMAJ9.0CAHM3 | Lower 400 W peak pulse power; SMA package (smaller thermal mass, higher RθJA = 140 °C/W) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only) and space-constrained layouts | Choose only if board area is critical and surge threat level is below 300 W requirement |
Compared with SMBJ9.0CAHE3/I, the SMBJ9.0CAHM3/I adds halogen-free construction and AEC-Q101 qualification without sacrificing clamping performance; versus SMAJ9.0CAHM3, it delivers 50% higher surge energy handling and superior thermal dissipation in the same footprint class.
Availability
SMBJ9.0CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom Ethernet interface designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ9.0CAHM3/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 optimization.
The SMBJ series is engineered for robust transient suppression in harsh environments-designed to meet automotive, industrial, and telecom surge immunity standards while enabling automated high-volume manufacturing.
FAQ
What is the clamping voltage of SMBJ9.0CAHM3/I at its rated peak pulse current?
The SMBJ9.0CAHM3/I has a maximum clamping voltage (VC) of 15.4 V at 39.0 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry exposed to the protected line will not experience voltages exceeding 15.4 V during specified surge events, directly supporting design margin for 12 V nominal systems.
Is SMBJ9.0CAHM3/I suitable for automotive applications?
Yes, SMBJ9.0CAHM3/I is AEC-Q101 qualified (indicated by the HM3 suffix), meaning it has passed stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life required for automotive electronic components. Its halogen-free, RoHS-compliant construction and MSL Level 1 rating further support use in engine control units, body control modules, and ADAS sensor assemblies.
How does the bidirectional configuration of SMBJ9.0CAHM3/I affect its circuit placement?
The bidirectional configuration of SMBJ9.0CAHM3/I eliminates polarity concerns during PCB layout-no cathode band marking is present, and the device functions identically regardless of orientation across a protected line. This simplifies routing on differential pairs (e.g., RS-485, CAN), AC-coupled signals, or floating grounds where voltage polarity reversal may occur during transients.
What is the thermal resistance of SMBJ9.0CAHM3/I, and how does it impact PCB layout?
SMBJ9.0CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repeated surges, designers must allocate adequate copper area and avoid excessive trace length between the device and ground/power planes.
Does SMBJ9.0CAHM3/I require special handling during reflow soldering?
No-SMBJ9.0CAHM3/I is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and can be processed using standard lead-free reflow profiles (peak temperature up to 260 °C) without pre-baking. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102, ensuring reliable wetting and intermetallic formation during assembly.
SMBJ9.0CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 39A
- 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)
SMBJ9.0CAHM3/I FAQ
1.How can I place an order for SMBJ9.0CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ9.0CAHM3/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 SMBJ9.0CAHM3/I reliable?
The price and inventory of SMBJ9.0CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ9.0CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ9.0CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ9.0CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ9.0CAHM3/I?
SMBJ9.0CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ9.0CAHM3/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 SMBJ9.0CAHM3/I?
For technical support, including SMBJ9.0CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ9.0CAHM3/I requirements.
6.How does Aetrix verify that SMBJ9.0CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ9.0CAHM3/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 SMBJ9.0CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ9.0CAHM3/I?
All SMBJ9.0CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ9.0CAHM3/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 SMBJ9.0CAHM3/I part is unused and in its original packaging.
Return procedure for SMBJ9.0CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ9.0CAHM3/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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