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Vishay General Semiconductor - Diodes Division SMBJ7.5C-E3/5B
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- Part No.:
- SMBJ7.5C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5C-E3/5B.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,316
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Product details
Overview
SMBJ7.5C-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in 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 1.0 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 interfaces in industrial power supplies.
For engineers reviewing the SMBJ7.5C-E3/5B datasheet, SMBJ7.5C-E3/5B pinout, SMBJ7.5C-E3/5B application, or SMBJ7.5C-E3/5B equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, RoHS-compliant packaging details, and direct alternatives for overvoltage protection design validation.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5% typical), low incremental surge resistance, and fast response time (<1 ns) to transient events such as inductive switching spikes or ESD.
Thermal performance is defined by RθJA = 100 °C/W (junction-to-ambient, on minimum pad layout) and RθJL = 20 °C/W (junction-to-lead), enabling reliable operation up to TJ = 150 °C. The device meets MSL Level 1 per J-STD-020 and supports reflow soldering with peak temperature of 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level DC bias margin. |
| VBR (min/max) | 8.33 V / 9.21 V at IT = 1.0 mA - Confirmed breakdown range ensures predictable turn-on during transients. |
| VC @ IPPM | 12.9 V at 46.5 A - Clamped voltage under 600 W 10/1000 µs surge; defines worst-case stress on downstream ICs. |
| IPPM | 46.5 A - Peak pulse current capability; determines survivability against common lightning/inductive surges. |
| PPPM | 600 W - Peak pulse power rating with 10/1000 µs waveform and 0.01% duty cycle; validates energy-handling capacity. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in high-ambient industrial environments without derating. |
| Package | SMB (DO-214AA) - Surface-mount outline with cathode band marking; compatible with automated placement and IPC-7351B footprint. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads. Cathode indicated by band marking on body. Meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward-biased surge events (rare in unidirectional TVS use). |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., +12 V rail); initiates avalanche conduction when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure when mounted per recommended pad layout. |
| 12.9 V clamping voltage at 46.5 A | Limits voltage overshoot across protected ICs to safe levels during 10/1000 µs surges, reducing risk of latch-up or gate oxide damage. |
| Low incremental surge resistance | Minimizes VC rise under high-current pulses, improving clamping precision and protecting sensitive logic inputs. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture-related popcorning or delamination. |
| RoHS-compliant, commercial grade | E3 suffix confirms compliance with EU RoHS Directive 2011/65/EU and JEDEC JESD201 Class 2 whisker resistance. |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppresses load-dump and inductive kickback transients on 12 V input rails of PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and ground to clamp positive-going surges before they reach DC/DC controllers. Use Value: Limits transient voltage to ≤12.9 V, preventing overvoltage shutdown or damage to 15 V-rated input stages of buck regulators. |
Use Scenario: Shields LIN bus transceivers and analog sensor front-ends from ESD and battery disconnect spikes in engine control units. IC Role / Device Role / Timing Role: Standoff-clamp element on signal line, activated only during >8.33 V excursions while remaining invisible during normal 0–12 V operation. Use Value: Maintains signal integrity below 7.5 V VWM, then clamps within nanoseconds to protect 5 V tolerant receiver inputs. |
| Consumer Device USB Port Protection | Telecom Line Card Surge Suppression |
|
Use Scenario: Guards VBUS line of USB 2.0 ports against hot-plug transients and external ESD events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 5 V supply rail, coordinated with series impedance to limit current into port controller. Use Value: Achieves <1 ns response and 12.9 V clamping, meeting IEC 61000-4-2 Level 4 (15 kV air) requirements without sacrificing data rate. |
Use Scenario: Protects Ethernet PHY interface circuits from lightning-induced surges on PoE-enabled RJ45 lines. IC Role / Device Role / Timing Role: Secondary surge suppressor downstream of gas discharge tube (GDT), handling residual energy after primary diversion. Use Value: Absorbs 600 W transient energy with low VC, ensuring PHY ICs see no more than 12.9 V during combined GDT+TVS coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5A-E3/5B | Same VWM (7.5 V), identical VBR range (8.33–9.21 V), but unidirectional with same SMB package and E3 RoHS suffix. | No functional difference - SMBJ7.5C-E3/5B and SMBJ7.5A-E3/5B are identical in electrical specs and marking; "C" vs "A" reflects legacy Vishay internal coding, not performance distinction. | Select SMBJ7.5A-E3/5B if cross-referencing older design documentation or distributor stock using "A" suffix convention. |
| SMCJ7.5A-E3/57T | Higher power rating (1500 W), larger SMC (DO-214AB) package, same VWM/VBR, but 10.3 V VC at 123 A - lower clamping voltage at higher current. | Used where higher surge energy (e.g., IEC 61000-4-5 2 Ω coupling) requires greater robustness; requires larger PCB footprint and thermal relief. | Choose SMCJ7.5A-E3/57T only when 600 W is insufficient and board space allows SMC package; otherwise SMBJ7.5C-E3/5B offers optimal size/power balance. |
Compared with SMBJ7.5A-E3/5B, the SMBJ7.5C-E3/5B is electrically identical and interchangeable; compared with SMCJ7.5A-E3/57T, it trades 2.5× peak power for 40% smaller footprint and lower parasitic inductance - critical for high-speed signal line protection.
Availability
SMBJ7.5C-E3/5B is available at Aetrix Electronics and suitable for industrial power supply protection, automotive sensor interface hardening, and consumer USB port safeguarding requiring stable component supply and full traceability.
Supply support for SMBJ7.5C-E3/5B 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 AEC-Q qualification.
The SMBJ series was developed for compact, high-power transient suppression in space-constrained industrial and automotive systems - delivering 600 W clamping in the industry-standard SMB footprint.
FAQ
What is the clamping voltage of SMBJ7.5C-E3/5B at its rated peak pulse current?
The SMBJ7.5C-E3/5B has a maximum clamping voltage (VC) of 12.9 V at its rated peak pulse current (IPPM) of 46.5 A, measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88392. The SMBJ7.5C-E3/5B maintains this clamping performance across its specified operating temperature range.
Is SMBJ7.5C-E3/5B RoHS-compliant and lead-free?
Yes, the SMBJ7.5C-E3/5B carries the "E3" suffix, indicating full compliance with the EU RoHS Directive 2011/65/EU and use of lead-free matte tin plating on terminals. It satisfies JESD 201 Class 2 whisker resistance testing and is rated for peak reflow temperatures up to 260 °C. The SMBJ7.5C-E3/5B is designated as commercial-grade and does not include halogen-free certification unless ordered with "M3" suffix.
How does SMBJ7.5C-E3/5B differ from SMBJ7.5A-E3/5B?
The SMBJ7.5C-E3/5B and SMBJ7.5A-E3/5B are functionally and electrically identical - both specify VWM = 7.5 V, VBR = 8.33–9.21 V, VC = 12.9 V, and share the same SMB (DO-214AA) package and E3 RoHS compliance. The "C" and "A" suffixes reflect Vishay's internal part numbering variants with no performance or reliability distinction. Engineers may substitute SMBJ7.5C-E3/5B directly for SMBJ7.5A-E3/5B in existing designs.
What is the maximum operating junction temperature for SMBJ7.5C-E3/5B?
The SMBJ7.5C-E3/5B has a maximum operating junction temperature (TJ) of +150 °C, as specified in Vishay's official datasheet. This rating enables reliable operation in high-ambient environments such as motor drives, industrial inverters, and under-hood automotive electronics. Derating of peak pulse power begins above TA = 25 °C per Figure 2 in Document Number 88392, with full 600 W capability maintained only at ambient ≤25 °C on recommended copper pads.
Can SMBJ7.5C-E3/5B be used in bidirectional applications?
No - the SMBJ7.5C-E3/5B is a unidirectional TVS diode, intended for clamping only positive-going transients relative to ground. For bidirectional protection (e.g., AC lines or differential buses), Vishay specifies parts with "CA" suffix such as SMBJ7.5CA. Using SMBJ7.5C-E3/5B in reverse-biased configurations risks permanent breakdown, as its forward voltage is not characterized for sustained conduction. Always verify polarity alignment during PCB layout for SMBJ7.5C-E3/5B.
SMBJ7.5C-E3/5B 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 42A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ7.5C-E3/5B FAQ
1.How can I place an order for SMBJ7.5C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5C-E3/5B 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 SMBJ7.5C-E3/5B reliable?
The price and inventory of SMBJ7.5C-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ7.5C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5C-E3/5B?
SMBJ7.5C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5C-E3/5B 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 SMBJ7.5C-E3/5B?
For technical support, including SMBJ7.5C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5C-E3/5B requirements.
6.How does Aetrix verify that SMBJ7.5C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5C-E3/5B 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 SMBJ7.5C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ7.5C-E3/5B?
All SMBJ7.5C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5C-E3/5B, 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 SMBJ7.5C-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ7.5C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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