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Vishay General Semiconductor - Diodes Division SMBJ7.5CAHM3/H
- Part No.:
- SMBJ7.5CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CAHM3/H.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,878
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Product details
Overview
SMBJ7.5CAHM3/H 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 or power lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA test current, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ7.5CAHM3/H datasheet, SMBJ7.5CAHM3/H pinout, SMBJ7.5CAHM3/H application, or SMBJ7.5CAHM3/H equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and halogen-free RoHS-compliant construction per Vishay's HM3 suffix standard.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling transient suppression without polarity sensitivity - critical for AC-coupled or differential signal lines. 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.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and supports automated SMT placement. Its 100 °C/W junction-to-ambient thermal resistance assumes mounting on 0.2" × 0.2" copper pads - derating applies above TA = 25 °C per Figure 2 of datasheet 88392.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown |
| VBR (min/max) | 8.33 V / 9.21 V at IT = 1.0 mA - guaranteed breakdown range ensuring predictable turn-on during transients |
| VC @ IPPM | 12.9 V at 46.5 A - clamped voltage under 600 W 10/1000 µs surge; determines protected circuit's maximum stress level |
| PPPM | 600 W - peak pulse power handling capability; defines transient energy absorption capacity per single event |
| IPPM | 46.5 A - peak pulse current supported at VC; used to size PCB trace width and layout for surge return path |
| TJ max. | +150 °C - maximum junction temperature; sets thermal design limits for high-duty-cycle or ambient-high environments |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient; requires minimum 5.0 mm × 5.0 mm copper pad per terminal for rated performance |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals. Bidirectional construction has no polarity marking; both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve identical roles; bidirectional clamping enables connection across any two points needing overvoltage protection |
| Cathode Band (absent) | Polarity indicator | Not present - confirms bidirectional functionality; no orientation required during placement |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables universal placement across AC, differential, or floating signal lines without polarity concerns |
| 600 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) in industrial interfaces |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive subsystems including body control modules and infotainment power rails |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing |
| MSL Level 1, 260 °C peak reflow | Allows single-pass lead-free reflow without moisture sensitivity concerns or baking preconditioning |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Power Rail |
|---|---|
|
Use Scenario: Protecting 24 V CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across VCC-GND and signal pairs to clamp transients before they reach sensitive analog front-ends or communication ICs. Use Value: Limits voltage excursion to ≤12.9 V during 46.5 A surges, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic and ADCs. |
Use Scenario: Safeguarding 12 V supply inputs to BCM microcontrollers and driver ICs against ISO 7637-2 Pulse 5a (load dump up to 60 V) in passenger vehicles. IC Role / Device Role / Timing Role: Primary clamping device on main power rail, coordinated with upstream fuses and secondary LC filtering to meet OEM EMC specifications. Use Value: AEC-Q101 qualification and 150 °C TJ rating ensure reliability under under-hood thermal cycling while maintaining 7.5 V system compatibility. |
| Telecom Line Card Surge Protection | Consumer USB-C Port ESD Clamp |
|
Use Scenario: Front-end protection for Ethernet PHYs and PoE injectors in enterprise switches exposed to lightning-induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Bidirectional TVS installed across differential pairs (e.g., TX+/TX−) to suppress common-mode transients without distorting signal integrity. Use Value: Low clamping voltage (12.9 V) and <1 ns response preserve 100BASE-TX eye diagram margins while absorbing >600 W surge energy. |
Use Scenario: Secondary-level ESD protection on USB-C CC and VCONN lines in portable devices, supplementing integrated TPD solutions. IC Role / Device Role / Timing Role: Standoff-rated (7.5 V) clamp that remains non-conductive during normal 5 V operation but activates within nanoseconds during ±15 kV HBM events. Use Value: Halogen-free HM3 construction supports consumer product sustainability mandates without sacrificing 600 W surge capability. |
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/H | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial-grade industrial controls where automotive qualification is unnecessary | Select when cost sensitivity outweighs halogen-free or automotive compliance requirements |
| SMAJ7.5CAHM3 | Lower 400 W PPPM, SMA (DO-214AC) package with higher RθJA (140 °C/W) | Used where board space is constrained but surge energy is lower (e.g., low-power IoT nodes) | Choose only if 400 W rating suffices and thermal margin allows smaller footprint |
Compared with SMBJ7.5CAHE3/H, the SMBJ7.5CAHM3/H adds halogen-free construction and AEC-Q101 qualification without changing clamping performance; versus SMAJ7.5CAHM3, it delivers 50% higher surge power and superior thermal dissipation in the same design flow - making it optimal for automotive and high-reliability industrial deployments.
Availability
SMBJ7.5CAHM3/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, telecom line cards, and consumer USB-C port protection requiring stable component supply and full traceability.
Supply support for SMBJ7.5CAHM3/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, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through robust, standardized, and qualified components.
FAQ
What does the "CA" suffix mean in SMBJ7.5CAHM3/H?
The "CA" suffix in SMBJ7.5CAHM3/H denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ7.5A), SMBJ7.5CAHM3/H has no cathode marking and functions identically regardless of terminal orientation - essential for protecting AC-coupled or differential signal paths without polarity constraints.
Is SMBJ7.5CAHM3/H qualified for automotive use?
Yes, SMBJ7.5CAHM3/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix and Vishay documentation (datasheet 88392, page 3, Note 1). This qualification validates its reliability under automotive temperature cycling, humidity, mechanical shock, and lifetime stress testing - making it suitable for body control modules, infotainment power supplies, and other non-safety-critical vehicle subsystems.
What is the maximum clamping voltage of SMBJ7.5CAHM3/H under surge conditions?
The maximum clamping voltage (VC) of SMBJ7.5CAHM3/H is 12.9 V at 46.5 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during worst-case transient events - critical for ensuring downstream 3.3 V or 5 V ICs remain within absolute maximum ratings.
How does the HM3 suffix differ from HE3 in Vishay's SMBJ series?
The HM3 suffix in SMBJ7.5CAHM3/H indicates halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, whereas HE3 denotes RoHS-compliant and AEC-Q101-qualified but not halogen-free. Both meet automotive reliability standards, but HM3 satisfies additional environmental mandates (e.g., IEC 61249-2-21) for bromine/chlorine content - required for certain Tier 1 automotive programs and green-certified consumer products.
Can SMBJ7.5CAHM3/H replace SMBJ7.5A in an existing design?
No - SMBJ7.5CAHM3/H is bidirectional while SMBJ7.5A is unidirectional, so direct replacement requires verification of circuit polarity and transient directionality. Unidirectional devices conduct forward surge current (IFSM = 100 A) and require correct cathode orientation; SMBJ7.5CAHM3/H eliminates orientation but cannot handle DC forward bias like its unidirectional counterpart. Layout and system-level surge path analysis must precede substitution.
SMBJ7.5CAHM3/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):
- 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/H FAQ
1.How can I place an order for SMBJ7.5CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CAHM3/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 SMBJ7.5CAHM3/H reliable?
The price and inventory of SMBJ7.5CAHM3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CAHM3/H?
SMBJ7.5CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CAHM3/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 SMBJ7.5CAHM3/H?
For technical support, including SMBJ7.5CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CAHM3/H requirements.
6.How does Aetrix verify that SMBJ7.5CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CAHM3/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 SMBJ7.5CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CAHM3/H?
All SMBJ7.5CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CAHM3/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 SMBJ7.5CAHM3/H part is unused and in its original packaging.
Return procedure for SMBJ7.5CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CAHM3/H Tags
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