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Vishay General Semiconductor - Diodes Division SMBJ7.5CAHM3_B/I
- Part No.:
- SMBJ7.5CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CAHM3_B/I.pdf
- Description:
- 600W,7.5V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,541
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Product details
Overview
SMBJ7.5CAHM3_B/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 power and signal lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ7.5CAHM3_B/I datasheet, SMBJ7.5CAHM3_B/I pinout, SMBJ7.5CAHM3_B/I application, or SMBJ7.5CAHM3_B/I equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, AEC-Q101-qualified halogen-free construction, thermal resistance data, and real-world protection use cases - all confirmed from Vishay's official SMBJ5.0A–SMBJ188A specification document (Rev. 09-Jan-2024, Doc. #88392).
Technical Context
This device operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity dependence. Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD, lightning-induced surges, and inductive switching spikes across DC rails and bidirectional data lines.
Designed for surface-mount assembly on standard PCB copper pads (0.2" × 0.2"), it delivers 600 W peak pulse power with 0.01% duty cycle, derated above 25 °C per Fig. 2, and maintains stable clamping performance up to 150 °C junction temperature while meeting J-STD-020 MSL Level 1 reflow requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.5 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 8.33–9.21 V at 1.0 mA - Guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 12.9 V at IPPM = 46.5 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capability under standardized 10/1000 µs waveform. |
| ID (Reverse Leakage) | 100 µA max at VWM - Low standby current minimizes power loss and avoids false triggering in low-power systems. |
| TJ max | 150 °C - Maximum junction temperature rating; supports operation in high-ambient industrial environments. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard pad layout; informs heatsinking and power derating needs. |
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), matte tin-plated terminals, RoHS-compliant and halogen-free (HM3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts during negative voltage excursions; symmetrical with cathode for bidirectional clamping. |
| Cathode | Transient current entry (positive half-cycle) | Conducts during positive voltage excursions; identical electrical behavior to anode due to bidirectional design. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients common in motor drives, relay coils, and industrial I/O without degradation. |
| AEC-Q101 qualified & halogen-free (HM3) | Validated for automotive-grade reliability and environmental compliance; suitable for under-hood and infotainment systems. |
| MSL Level 1, 260 °C peak reflow | Supports lead-free assembly without moisture sensitivity concerns or pre-bake requirements. |
| Low clamping ratio (VC/VWM = 1.72) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices. |
Applications
| Industrial Motor Drive Control | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O against back-EMF spikes from brushed DC motors and solenoids. IC Role / Device Role: Bidirectional clamping element placed across motor coil terminals and MCU GPIO lines. Use Value: Limits transient voltage to ≤12.9 V, preventing latch-up or oxide damage in 5 V/3.3 V logic interfaces. |
Use Scenario: Surge suppression on LIN bus lines and power inputs in BCM modules exposed to load dump and jump-start conditions. IC Role / Device Role: Primary TVS on 12 V supply rail and bidirectional data lines interfacing door locks and sensors. Use Value: Withstands 600 W pulses and operates reliably from −40 °C to +125 °C ambient, meeting ISO 7637-2 Pulse 5a requirements. |
| Industrial Sensor Signal Conditioning | Telecom Power Supply Input Stage |
Use Scenario: Guarding analog front-end inputs of pressure/temperature sensors connected to long cables in factory automation. IC Role / Device Role: Low-leakage (≤100 µA) bidirectional clamp on differential sensor outputs (e.g., 4–20 mA loop returns). Use Value: Maintains signal integrity with minimal offset error while suppressing ESD and cable-coupled noise up to ±15 kV contact discharge. |
Use Scenario: Front-end transient protection on AC/DC adapter outputs feeding telecom baseband processors and memory. IC Role / Device Role: Secondary-stage TVS after bulk filtering, absorbing residual surges that bypass primary MOVs. Use Value: Clamps 10/1000 µs surges to 12.9 V with <1 ns response, ensuring downstream 5 V LDOs and DDR memory remain within absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CAHE3_B/I | Same electrical specs, but RoHS-compliant commercial grade (E3) without halogen-free certification. | Lacks halogen-free qualification; acceptable for non-automotive industrial use where material compliance is not mandated. | Select when cost optimization is prioritized and halogen-free materials are not required by end-customer specifications. |
| SMBJ7.5CAHM3_B/H | Identical electrical and material specs, but supplied in 7" tape-and-reel (750 pcs) instead of 13" reel (3200 pcs). | Lower packaging quantity suits prototyping and low-volume production runs with limited reel storage space. | Choose for engineering validation, small-batch builds, or when inventory turnover favors smaller reels. |
Compared with SMBJ7.5CAHM3_B/I, the HE3 variant trades halogen-free assurance for lower unit cost, while the HM3_B/H variant retains full spec compliance but reduces order flexibility through smaller reel size - both require no schematic or layout changes.
Availability
SMBJ7.5CAHM3_B/I is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and telecom power supply designs requiring stable component supply, halogen-free compliance, and AEC-Q101 reliability validation.
Supply support for SMBJ7.5CAHM3_B/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 high-reliability, automotive-qualified, and industry-standard solutions.
The SMBJ series targets robust transient suppression in harsh environments, engineered specifically for industrial automation, automotive subsystems, and telecom infrastructure where repeatable clamping performance and long-term stability are critical.
FAQ
What does the "CA" suffix indicate in SMBJ7.5CAHM3_B/I?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ7.5CAHM3_B/I clamps voltage transients equally in both polarities - unlike unidirectional variants (e.g., SMBJ7.5A) that only protect against positive surges. This makes SMBJ7.5CAHM3_B/I ideal for AC-coupled lines, floating buses, and differential signal paths where polarity reversal is possible.
Is SMBJ7.5CAHM3_B/I suitable for automotive applications?
Yes - SMBJ7.5CAHM3_B/I carries the HM3 suffix, confirming it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. These certifications validate its suitability for automotive use cases including body control modules, infotainment power rails, and sensor interfaces subject to ISO 7637-2 and ISO 10605 stress testing.
What is the maximum clamping voltage of SMBJ7.5CAHM3_B/I under surge conditions?
The maximum clamping voltage (VC) of SMBJ7.5CAHM3_B/I is 12.9 V, measured at its rated peak pulse current of 46.5 A using the standard 10/1000 µs waveform. This value represents the highest voltage imposed on the protected circuit during worst-case transient events, ensuring compatibility with 5 V and 3.3 V logic families.
How does the SMB (DO-214AA) package of SMBJ7.5CAHM3_B/I compare to SMA or SMC packages?
The SMB (DO-214AA) package of SMBJ7.5CAHM3_B/I offers a 4.57 mm × 3.94 mm footprint - smaller than SMC (DO-214AB) but larger than SMA (DO-214AC). It balances power handling (600 W) with board space efficiency and is optimized for automated placement, whereas SMA limits peak power to ~400 W and SMC supports up to 1500 W but occupies more area.
Does SMBJ7.5CAHM3_B/I require a heatsink for standard operation?
No - SMBJ7.5CAHM3_B/I is rated for 600 W peak pulse power with no heatsink when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. Its RθJA of 100 °C/W assumes this layout; adding thermal relief or reducing pad area increases junction temperature and requires derating per Fig. 2 in the Vishay datasheet (Doc. #88392).
SMBJ7.5CAHM3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 46.5A
- 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)
SMBJ7.5CAHM3_B/I FAQ
1.How can I place an order for SMBJ7.5CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CAHM3_B/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 SMBJ7.5CAHM3_B/I reliable?
The price and inventory of SMBJ7.5CAHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CAHM3_B/I?
SMBJ7.5CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CAHM3_B/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 SMBJ7.5CAHM3_B/I?
For technical support, including SMBJ7.5CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CAHM3_B/I requirements.
6.How does Aetrix verify that SMBJ7.5CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CAHM3_B/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 SMBJ7.5CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CAHM3_B/I?
All SMBJ7.5CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CAHM3_B/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 SMBJ7.5CAHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ7.5CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CAHM3_B/I Tags
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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