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Vishay General Semiconductor - Diodes Division SMBJ7.5-E3/52
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- Part No.:
- SMBJ7.5-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5-E3/52.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,748
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Product details
Overview
SMBJ7.5-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection of DC power rails 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, 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 - deployed in industrial sensor interfaces and automotive body control modules.
For engineers reviewing the SMBJ7.5-E3/52 datasheet, SMBJ7.5-E3/52 pinout, SMBJ7.5-E3/52 application, or SMBJ7.5-E3/52 equivalent, key selection criteria include clamping performance under 46.5 A surge, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking, RoHS-compliant matte tin plating, and SMB (DO-214AA) package compatibility with automated SMT placement.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 7.5 V, it avalanches to limit transient energy by diverting surge current to ground. Its glass-passivated junction ensures stable breakdown and low leakage (<100 µA at VWM), while the 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad design per Vishay's 0.2" × 0.2" (5.0 mm × 5.0 mm) recommendation.
The device sustains 100 A non-repetitive forward surge (8.3 ms half-sine) and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Polarity is marked by a cathode band; no marking is used on bidirectional variants. It is not AEC-Q101 qualified - the HE3 suffix denotes automotive qualification, but SMBJ7.5-E3/52 is commercial-grade only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system rail margin. |
| VBR @ IT = 1.0 mA | 8.33–9.21 V - Verified breakdown range ensuring reliable turn-on without premature conduction during normal operation. |
| VC @ IPPM = 46.5 A | 12.9 V - Clamped voltage during 10/1000 µs surge; defines worst-case stress on protected ICs. |
| PPPM | 600 W - Peak pulse power handling capability with 0.01 % duty cycle; supports repetitive transient suppression. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; mandates ≥5.0 mm × 5.0 mm copper pads for rated power dissipation. |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); validates robustness against inductive switch-off events. |
| Package | SMB (DO-214AA) - Low-profile SMT outline with 2.18 mm min. cathode-to-anode length; compatible with standard pick-and-place feeders. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode indicated by a molded band on the case body. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode | Reference return path | Typically tied to system ground or low-impedance return plane; completes shunt path for surge energy dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients like ISO 7637-2 Pulse 1/2a/5a in 12 V automotive subsystems. |
| 12.9 V clamping at 46.5 A | Keeps downstream logic-level ICs (e.g., microcontrollers, CAN transceivers) within safe absolute maximum ratings during surge. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<100 µA) across temperature and lifetime, critical for battery-powered sensors. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without moisture-related popcorning or delamination risks. |
| RoHS-compliant, matte tin terminals | Guarantees solderability and intermetallic formation control in high-volume manufacturing environments. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop transmitters) from ESD and load dump-induced spikes in factory automation systems. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly across sensor output and ground, responding in <1 ps to clamp surges before reaching precision DAC or op-amp inputs. Use Value: Limits voltage excursion to ≤12.9 V during 46.5 A transients, preserving 16-bit measurement integrity and avoiding ADC saturation or latch-up. |
Use Scenario: Safeguarding LIN bus transceiver power pins against battery disconnection spikes and alternator load dump in door module ECUs. IC Role / Device Role / Timing Role: Primary DC rail protector on VCC input of LIN transceiver ICs (e.g., TLE7259), activated within nanoseconds of overvoltage onset. Use Value: Maintains transceiver functionality during 100 V/50 ms load dump events by clamping to 12.9 V, preventing internal LDO failure or ESD cell damage. |
| Consumer Power Adapter Input | Telecom PoE Midspan Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 5 V/9 V USB-C adapter outputs exposed to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Fast-acting crowbar element parallel to output capacitor, triggered by >7.5 V excursions to shunt surge into bulk capacitance and ground. Use Value: Prevents downstream USB PD controller ICs (e.g., FUSB302) from exceeding 20 V absolute max rating during 8 kV contact ESD per IEC 61000-4-2. |
Use Scenario: DC bias rail protection in IEEE 802.3af/at midspan PSE equipment where 48 V phantom power lines face lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional clamping device on each powered pair (spare pairs or data pairs), referenced to common-mode ground. Use Value: Clamps induced common-mode transients to ≤12.9 V without disrupting 48 V DC delivery or violating PoE isolation requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5A-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy. | Direct substitution if halogen-free materials are required; same layout, thermal, and electrical behavior. |
| SMCJ7.5A-E3/52 | Same VWM/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM and lower RθJA (50 °C/W). | Used where higher surge endurance (>100 A IPPM) or improved thermal margin is needed on high-power boards. | Choose when board space allows and surge immunity must exceed 600 W - not pin-compatible due to larger footprint. |
Compared with SMBJ7.5-E3/52, the M3/52 variant offers identical protection performance with halogen-free construction, while the SMCJ7.5A-E3/52 delivers 2.5× higher pulse power in a physically incompatible package - requiring PCB redesign but enabling robustness in harsher surge environments.
Availability
SMBJ7.5-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and consumer power adapter designs requiring stable component supply, consistent RoHS compliance, and verified surge immunity per IEC 61000-4-5.
Supply support for SMBJ7.5-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, power efficiency, and application-specific validation.
The SMBJ series is engineered for cost-effective, high-volume transient suppression in DC power and signal lines - targeting industrial, automotive, and consumer applications where fast response, repeatable clamping, and SMT manufacturability are essential.
FAQ
What is the maximum clamping voltage of SMBJ7.5-E3/52 under surge conditions?
The SMBJ7.5-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 standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ7.5-E3/52 maintains this clamping performance across its specified operating temperature range of –55 °C to +150 °C.
Is SMBJ7.5-E3/52 suitable for automotive applications requiring AEC-Q101 qualification?
No, SMBJ7.5-E3/52 is not AEC-Q101 qualified. It carries the "E3" suffix, indicating RoHS-compliant commercial-grade construction. For automotive use, Vishay specifies the "HE3" suffix (e.g., SMBJ7.5AHE3_B/H), which denotes full AEC-Q101 qualification including extended temperature cycling, humidity testing, and mechanical shock validation. The SMBJ7.5-E3/52 should be limited to industrial or consumer applications where automotive-grade reliability is not mandated.
How does the SMBJ7.5-E3/52 differ from bidirectional TVS diodes like SMBJ7.5CA?
The SMBJ7.5-E3/52 is unidirectional and functions only in reverse-bias avalanche mode, with polarity marked by a cathode band. In contrast, SMBJ7.5CA is bidirectional and symmetrical - it clamps in both polarities, making it suitable for AC lines or differential signal pairs. Electrical differences include higher ID leakage for SMBJ7.5CA at low VWM, and distinct VBR symmetry (±6.4–7.25 V). The SMBJ7.5-E3/52 cannot replace SMBJ7.5CA in AC-coupled circuits without redesign.
What PCB layout guidance applies to SMBJ7.5-E3/52 for optimal thermal performance?
Vishay specifies that SMBJ7.5-E3/52 must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its rated 600 W pulse power and 5.0 W steady-state dissipation. Traces connecting the SMBJ7.5-E3/52 should be short and wide to minimize inductance and resistive heating. Thermal vias under pads are recommended for multilayer boards. Failure to meet pad size requirements de-rates both peak power and junction temperature limits per Figure 2 in Document 88392.
Can SMBJ7.5-E3/52 be used to protect 3.3 V logic circuits?
No - SMBJ7.5-E3/52 is not appropriate for 3.3 V logic protection because its 7.5 V stand-off voltage (VWM) exceeds the IC's absolute maximum rating, risking permanent damage during normal operation. For 3.3 V rails, devices such as SMBJ3.3A (VWM = 3.3 V) or specialized low-voltage TVS arrays (e.g., SMA6J3.3A) are required. Using SMBJ7.5-E3/52 on a 3.3 V line would result in continuous reverse leakage and possible thermal runaway.
SMBJ7.5-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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ7.5-E3/52 FAQ
1.How can I place an order for SMBJ7.5-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5-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 SMBJ7.5-E3/52 reliable?
The price and inventory of SMBJ7.5-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 SMBJ7.5-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ7.5-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5-E3/52?
SMBJ7.5-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5-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 SMBJ7.5-E3/52?
For technical support, including SMBJ7.5-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5-E3/52 requirements.
6.How does Aetrix verify that SMBJ7.5-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5-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 SMBJ7.5-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ7.5-E3/52?
All SMBJ7.5-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5-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 SMBJ7.5-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ7.5-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5-E3/52 Tags
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