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Vishay General Semiconductor - Diodes Division SMBJ9.0CAHM3/H
- Part No.:
- SMBJ9.0CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ9.0CAHM3/H.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,882
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Product details
Overview
SMBJ9.0CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 9.0 V stand-off voltage (VWM), 10.0–11.1 V breakdown voltage (VBR) at 1 mA test current, and clamps transients to ≤15.4 V at 39.0 A peak pulse current (IPPM) under 10/1000 µs waveform - deployed on power rails and signal lines in industrial sensor interfaces.
For engineers reviewing the SMBJ9.0CAHM3/H datasheet, SMBJ9.0CAHM3/H pinout, SMBJ9.0CAHM3/H application, or SMBJ9.0CAHM3/H equivalent, this device serves as a halogen-free, RoHS-compliant, AEC-Q101-qualified TVS for automotive-grade transient suppression where bidirectional clamping, low clamping ratio (1.71), and MSL Level 1 moisture sensitivity are critical selection criteria.
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 incremental surge resistance, and fast response time (<1 ns) to ESD and lightning-induced surges.
Rated for 600 W peak pulse power (10/1000 µs), it delivers 39.0 A IPPM capability while maintaining a maximum clamping voltage of 15.4 V - enabling effective protection of 12 V systems without overstressing downstream ICs or MOSFETs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse operating voltage before significant leakage; sets system rail compatibility for 12 V nominal circuits. |
| VBR (min/max) | 10.0 V / 11.1 V at IT = 1 mA - Confirmed breakdown threshold range defining turn-on consistency and tolerance stack-up in protection design. |
| VC @ IPPM | 15.4 V max at 39.0 A - Clamping voltage during worst-case 600 W transient; determines protected device's maximum stress exposure. |
| IPPM | 39.0 A - Peak surge current handling under standardized 10/1000 µs waveform; defines single-event energy absorption capacity. |
| PPPM | 600 W - Peak pulse power rating; validates suitability for IEC 61000-4-5 Level 3/4 surge immunity compliance testing. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial ambient environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated SMT placement. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals with identical electrical behavior in both directions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal accepts transient energy from either polarity; no cathode band marking required per datasheet note. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity up to 4 kV (line-to-earth) in compact SMB footprint. |
| Clamping ratio (VC/VBR) ≈ 1.71 | Low overvoltage margin ensures protected ICs remain within absolute maximum ratings during transient events. |
| AEC-Q101 qualified (HM3 suffix) | Validated reliability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant (HM3) | Fulfills environmental compliance requirements for global OEM supply chains without compromising surge performance. |
| MSL Level 1 (260 °C reflow peak) | Eliminates pre-bake requirement for standard SMT assembly, reducing manufacturing cost and process complexity. |
Applications
| Automotive Sensor Interface | Industrial PLC 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 clamping element placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal integrity by limiting transient overshoot to ≤15.4 V while surviving repeated 600 W pulses - extending lifetime of 12 V rail-connected ASICs. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced surges from solenoid coil de-energization. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input channels, coordinated with upstream fusing and filtering. Use Value: Prevents false triggering and latch-up in microcontroller GPIOs by clamping transients within 1 ns, with verified operation up to +150 °C ambient. |
| Telecom Power Supply Rail | Consumer Appliance Motor Control |
Use Scenario: Secondary-side transient suppression on 48 V PoE-powered equipment (e.g., IP cameras, wireless access points) exposed to Ethernet cable coupling. IC Role / Device Role / Timing Role: Fast-acting bidirectional TVS parallel to DC-DC converter input, absorbing coupled lightning surges per IEC 61000-4-5. Use Value: Achieves <15.4 V clamping at 39 A, ensuring downstream regulators remain functional after multiple 4 kV surges without derating. |
Use Scenario: Protecting gate drivers and MCU pins in brushless motor inverters inside washing machines and HVAC blowers subjected to back-EMF spikes. IC Role / Device Role / Timing Role: Localized TVS across half-bridge high-side/low-side driver supply rails and PWM signal traces. Use Value: Withstands repetitive 600 W pulses at 0.01% duty cycle, preventing cumulative degradation in high-cycle appliance environments. |
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/H | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification; same VWM, VBR, VC, and PPPM. | Suitable for commercial/industrial use only; excluded from automotive production due to missing AEC-Q101 and halogen-free certification. | Select SMBJ9.0CAHE3/H only when halogen-free content and automotive qualification are not required. |
| SMAJ9.0CAHM3 | Same electrical specs but in smaller SMA (DO-214AC) package; lower PPPM (400 W); different thermal resistance (RθJA = 140 °C/W vs. 100 °C/W). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4; requires tighter layout due to reduced power handling. | Choose SMAJ9.0CAHM3 only if board space is constrained and surge threat level is ≤400 W. |
Compared with SMBJ9.0CAHE3/H, SMBJ9.0CAHM3/H adds halogen-free construction and AEC-Q101 qualification without sacrificing clamping performance; versus SMAJ9.0CAHM3, it delivers 50% higher surge power rating and superior thermal dissipation in the same production-ready SMB footprint.
Availability
SMBJ9.0CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom power rail stabilization requiring stable component supply across extended production lifecycles.
Supply support for SMBJ9.0CAHM3/H 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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping, long-term stability, and regulatory compliance are non-negotiable.
FAQ
What does the "HM3" suffix indicate in SMBJ9.0CAHM3/H?
The "HM3" suffix in SMBJ9.0CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification - confirming suitability for automotive applications and meeting strict environmental regulations. This distinguishes SMBJ9.0CAHM3/H from commercial-grade variants like SMBJ9.0CA-E3/H and ensures validated reliability under temperature cycling, humidity, and mechanical shock per AEC-Q101 test conditions.
Is SMBJ9.0CAHM3/H unidirectional or bidirectional?
SMBJ9.0CAHM3/H is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number and explicit documentation stating "Electrical characteristics apply in both directions." It provides symmetrical clamping for positive and negative transients without polarity dependence - ideal for AC-coupled signal lines or floating DC rails where voltage reversal may occur.
What is the maximum clamping voltage of SMBJ9.0CAHM3/H at rated surge current?
The maximum clamping voltage (VC) of SMBJ9.0CAHM3/H is 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 protected circuitry will not experience more than 15.4 V during worst-case surge events - critical for safeguarding 12 V logic interfaces and analog front-ends.
Can SMBJ9.0CAHM3/H replace SMBJ9.0A in a design?
No - SMBJ9.0CAHM3/H is bidirectional while SMBJ9.0A is unidirectional; substituting them without circuit review risks improper clamping during negative transients. Additionally, SMBJ9.0A lacks AEC-Q101 qualification and halogen-free certification. Use SMBJ9.0CAHM3/H only where bidirectional protection and automotive compliance are required; verify layout symmetry and absence of cathode-dependent routing before integration.
What is the thermal resistance of SMBJ9.0CAHM3/H, and how does it affect PCB layout?
SMBJ9.0CAHM3/H 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 specification - underscoring the need for adequate copper area and thermal vias to maintain TJ ≤ 150 °C during repetitive surge events. Reducing pad size increases RθJA and risks thermal runaway.
SMBJ9.0CAHM3/H 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/H FAQ
1.How can I place an order for SMBJ9.0CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ9.0CAHM3/H 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/H reliable?
The price and inventory of SMBJ9.0CAHM3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMBJ9.0CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ9.0CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ9.0CAHM3/H?
SMBJ9.0CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ9.0CAHM3/H 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/H?
For technical support, including SMBJ9.0CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ9.0CAHM3/H requirements.
6.How does Aetrix verify that SMBJ9.0CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ9.0CAHM3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMBJ9.0CAHM3/H?
All SMBJ9.0CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ9.0CAHM3/H, 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/H part is unused and in its original packaging.
Return procedure for SMBJ9.0CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ9.0CAHM3/H Tags
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