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Vishay General Semiconductor - Diodes Division SMBJ7.5C-E3/52
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- Part No.:
- SMBJ7.5C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5C-E3/52.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,011
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Product details
Overview
SMBJ7.5C-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA test current, and clamps transients to ≤12.9 V at 46.5 A peak pulse current (IPPM) under 10/1000 µs waveform-used to safeguard power rails and I/O lines in industrial sensor interfaces.
For engineers reviewing the SMBJ7.5C-E3/52 datasheet, SMBJ7.5C-E3/52 pinout, SMBJ7.5C-E3/52 application, or SMBJ7.5C-E3/52 equivalent, this device is evaluated for fast-response surge suppression in DC power inputs, MOSFET gate protection, and low-voltage signal line hardening where 600 W peak pulse power and <1 ns response time are critical selection criteria.
Technical Context
This TVS diode operates as a clamping-type protector with avalanche breakdown behavior, triggered when reverse voltage exceeds VBR. Its unidirectional polarity uses a cathode band marking and exhibits low incremental surge resistance (typical Rdyn < 0.2 Ω), enabling precise voltage limiting during ESD or lightning-induced surges.
Thermally, it supports junction temperatures from –55 °C to +150 °C and delivers 5.0 W steady-state power dissipation at TA = 50 °C on infinite heatsink. Its MSL Level 1 rating (per J-STD-020) and matte tin-plated leads ensure compatibility with standard reflow profiles and automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before leakage exceeds 100 µA; sets safe DC bias margin for 9 V rail protection. |
| VBR (min/max) | 8.33 V / 9.21 V at IT = 1.0 mA - Confirmed breakdown range ensures reliable triggering without premature conduction. |
| VC @ IPPM | ≤12.9 V at 46.5 A - Clamping voltage defines worst-case stress on downstream ICs during 600 W transient events. |
| PPPM | 600 W - Peak pulse power handling per 10/1000 µs waveform; validates suitability for IEC 61000-4-5 Level 3 surges. |
| IPPM | 46.5 A - Peak surge current capacity directly determines survivability against 100 A system-level transients after impedance scaling. |
| TJ max. | +150 °C - Maximum junction temperature enables operation in sealed enclosures or high-ambient industrial environments. |
| RθJA | 100 °C/W - Thermal resistance confirms need for minimum 0.2" × 0.2" copper pads per terminal to sustain rated power. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with UL 94 V-0 flammability rating. Cathode marked by a single band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to protected circuit ground or low-side reference; completes clamping loop during overvoltage events. |
| Cathode | Reverse voltage sensing / Clamping output node | Connected to protected line (e.g., 7.5 V supply); conducts avalanche current when VAK > VBR, shunting surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial control inputs. |
| Clamping voltage ≤12.9 V at 46.5 A | Keeps downstream 5 V or 3.3 V logic ICs within absolute maximum ratings during transient events. |
| Fast response time (<1 ns) | Prevents voltage overshoot before protection activates, critical for safeguarding high-speed analog front-ends. |
| MSL Level 1, 260 °C peak reflow | Supports lead-free assembly without pre-baking or special handling in high-volume SMT lines. |
| Glass passivated junction | Ensures stable VBR and low leakage (<100 µA at VWM) across temperature and lifetime. |
Applications
| Industrial Sensor Power Input | Automotive Body Control Module (BCM) I/O |
|---|---|
|
Use Scenario: Protecting 7.5 V power rail feeding MEMS pressure sensors in factory automation PLCs exposed to relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input filter capacitor and LDO regulator input. Use Value: Limits induced transients to ≤12.9 V, preventing LDO latch-up and sensor calibration drift during 100 V/1 A switching surges. |
Use Scenario: Safeguarding LIN bus transceiver VCC pin in BCM modules subjected to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 7.5 V auxiliary supply rail upstream of transceiver IC. Use Value: Absorbs 600 W pulses without degradation, maintaining transceiver functionality during ISO 7637-2 Pulse 5a events. |
| DC-DC Converter Feedback Node | USB-C Power Delivery Line Protection |
|
Use Scenario: Shielding resistor-divider feedback network of isolated 7.5 V flyback converter from ESD and cross-talk coupling. IC Role / Device Role / Timing Role: Low-capacitance TVS placed across feedback resistors to suppress sub-100 ns transients. Use Value: Prevents false regulation trips and output voltage excursions caused by <1 kV HBM ESD on PCB traces. |
Use Scenario: Hardening VBUS line in USB-C PD sink designs supporting 5 V/3 A profile with legacy adapter compatibility. IC Role / Device Role / Timing Role: Standoff-rated TVS on input side of buck controller, before input capacitor. Use Value: Clamps 15 kV contact ESD per IEC 61000-4-2 to <13 V, avoiding controller shutdown or FET gate oxide damage. |
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-E3/52 | Unidirectional variant with identical VWM, VBR, and VC; same SMB package and thermal specs. | No functional difference-SMBJ7.5C-E3/52 and SMBJ7.5A-E3/52 are identical in electrical performance and marking; "C" and "A" denote legacy suffix variants per Vishay ordering matrix. | Select SMBJ7.5A-E3/52 if sourcing from distributors listing only "A" suffix; no design change required. |
| SMCJ7.5A-E3/52 | Same VWM/VBR but in larger SMC (DO-214AB) package; 1500 W PPPM, higher IPPM (109 A), and lower RθJA (50 °C/W). | Used where higher surge margin or improved thermal derating is needed-e.g., outdoor telecom power supplies with frequent lightning exposure. | Choose SMCJ7.5A-E3/52 only if board layout allows larger footprint and higher surge energy must be absorbed without clamping voltage rise. |
Compared with SMBJ7.5C-E3/52, SMBJ7.5A-E3/52 offers identical protection performance in the same SMB footprint, while SMCJ7.5A-E3/52 trades compactness for 2.5× higher surge capacity and better thermal management-making it suitable only when PCB space and thermal budget permit.
Availability
SMBJ7.5C-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, DC-DC converter feedback networks, and USB-C power delivery line protection requiring stable component supply and RoHS-compliant commercial-grade TVS diodes.
Supply support for SMBJ7.5C-E3/52 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, precision, and high-volume manufacturability.
The SMBJ series is engineered for surface-mount transient suppression in cost-sensitive, space-constrained applications across industrial, automotive, and consumer systems-prioritizing fast response, repeatable clamping, and automated assembly compatibility.
FAQ
What is the maximum clamping voltage of SMBJ7.5C-E3/52 under surge conditions?
The SMBJ7.5C-E3/52 has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current of 46.5 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuits during transient events. Designers use this parameter to verify that downstream components remain within their absolute maximum ratings. The SMBJ7.5C-E3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ7.5C-E3/52 RoHS-compliant and halogen-free?
Yes, SMBJ7.5C-E3/52 carries the "E3" suffix, indicating it is RoHS-compliant and meets commercial-grade specifications per Vishay's material categorization. However, it is not halogen-free-the halogen-free version uses the "M3" suffix (e.g., SMBJ7.5C-M3/52). Both variants share identical electrical characteristics and SMB package dimensions. The SMBJ7.5C-E3/52 is manufactured with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Does SMBJ7.5C-E3/52 have AEC-Q101 qualification?
No, SMBJ7.5C-E3/52 is not AEC-Q101 qualified. Automotive-qualified versions use the "HE3" or "HM3" suffixes (e.g., SMBJ7.5C-HE3_X), which include additional stress testing and traceability per AEC-Q101 requirements. The SMBJ7.5C-E3/52 is rated for commercial-grade operation (–55 °C to +150 °C) and is suitable for industrial and consumer applications where automotive qualification is not mandated. For automotive body electronics, specify SMBJ7.5C-HE3_B/H instead of SMBJ7.5C-E3/52.
What is the reverse leakage current of SMBJ7.5C-E3/52 at its stand-off voltage?
At its rated stand-off voltage (VWM) of 7.5 V and ambient temperature of 25 °C, the SMBJ7.5C-E3/52 exhibits a maximum reverse leakage current (ID) of 100 µA. This low leakage ensures minimal power loss in always-on circuits and avoids false triggering in high-impedance monitoring nodes. Leakage remains below 500 µA up to 85 °C, supporting reliable operation in thermally demanding environments. The SMBJ7.5C-E3/52 achieves this performance via glass passivated junction technology.
Can SMBJ7.5C-E3/52 be used in bidirectional protection circuits?
No, SMBJ7.5C-E3/52 is a unidirectional TVS diode and is not suitable for bidirectional protection. Bidirectional variants use the "CA" suffix (e.g., SMBJ7.5CA-E3/52) and feature symmetrical breakdown in both polarities. Using SMBJ7.5C-E3/52 in AC-coupled or floating signal lines risks forward conduction during negative half-cycles, potentially damaging the device or distorting signals. For bidirectional applications such as RS-485 or CAN bus lines, select SMBJ7.5CA-E3/52 instead of SMBJ7.5C-E3/52.
SMBJ7.5C-E3/52 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-E3/52 FAQ
1.How can I place an order for SMBJ7.5C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5C-E3/52 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-E3/52 reliable?
The price and inventory of SMBJ7.5C-E3/52 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-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ7.5C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5C-E3/52?
SMBJ7.5C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5C-E3/52 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-E3/52?
For technical support, including SMBJ7.5C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5C-E3/52 requirements.
6.How does Aetrix verify that SMBJ7.5C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5C-E3/52 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-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ7.5C-E3/52?
All SMBJ7.5C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5C-E3/52, 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-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ7.5C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5C-E3/52 Tags
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