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Vishay General Semiconductor - Diodes Division SMBJ7.5A-E3/52
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- Part No.:
- SMBJ7.5A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5A-E3/52.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:770
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Product details
Overview
SMBJ7.5A-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 SMBJ7.5A-E3/52 datasheet, SMBJ7.5A-E3/52 pinout, SMBJ7.5A-E3/52 application, or SMBJ7.5A-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 characteristics and low leakage (<100 µA at VWM).
The device sustains repetitive 10/1000 µs surges at 0.01% duty cycle, with thermal derating above 25 °C per Fig. 2 and peak forward surge capability of 100 A (8.3 ms half-sine). Polarity is marked by a cathode band; no marking applies to bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping initiates; sets minimum system rail margin. |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - Confirmed breakdown range ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 12.9 V at 46.5 A - Clamping voltage defines worst-case voltage seen by protected IC during surge event. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; validates robustness against lightning-induced transients. |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); supports high-energy inductive switch-off events. |
| TJ max. | +150 °C - Maximum junction temperature enables operation in under-hood automotive or industrial enclosures. |
| RθJA | 100 °C/W - Thermal resistance determines required PCB copper area (0.2" × 0.2") for safe power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode identified by molded band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or lower-potential node. | Provides reference path for clamping; must be routed with low-inductance trace to minimize overshoot. |
| Cathode | Current exit point in forward bias; marked by band; connected to protected line or supply rail. | Defines polarity-sensitive placement - reversal disables protection and risks short-circuit failure. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated surge immunity for IEC 61000-4-5 Level 3 (1 kV/2 kV) compliance in industrial power inputs. |
| Low incremental surge resistance | Enables tight clamping window (VC − VBR = ~4.6 V), reducing stress on downstream MOSFET gate oxides. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free assembly without moisture-related popcorning or delamination. |
| RoHS-compliant, commercial-grade (E3 suffix) | Meets EU RoHS Directive 2011/65/EU and JEDEC JESD201 Class 2 whisker resistance. |
| Fast response time (<1 ps) | Clamps transients before propagation across PCB traces, protecting high-speed logic and ADC front-ends. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting 5 V CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ESD events in factory automation systems. IC Role / Device Role: Unidirectional shunt clamp placed between signal line and ground, upstream of ESD diode array. Use Value: Limits transient voltage to ≤12.9 V during 46.5 A surge, preventing latch-up in 5 V tolerant transceivers and preserving signal integrity. |
Use Scenario: Safeguarding microcontroller I/O pins and power supply rails in door module ECUs exposed to battery reverse-connection and alternator load dump. IC Role / Device Role: Primary overvoltage clamp on 12 V input rail and 5 V/3.3 V LDO outputs. Use Value: Absorbs 600 W surge energy while maintaining clamped voltage below 13 V, avoiding brownout or reset of 12 V-rated MCU peripherals. |
| Consumer Power Adapter Input | Telecom PoE Midspan Protection |
|
Use Scenario: Secondary-side DC bus protection in USB-C PD adapters where 7.5 V rail supplies controller ICs and gate drivers. IC Role / Device Role: Standoff-limited TVS on post-rectifier output, coordinated with upstream MOV and fuse. Use Value: Fast clamping prevents overvoltage damage to silicon carbide MOSFET drivers during AC line switching transients. |
Use Scenario: Data-line surge suppression on IEEE 802.3af/at PoE midspan injectors where 7.5 V auxiliary rails power PHY management circuitry. IC Role / Device Role: Low-capacitance unidirectional clamp on MDI pairs and control logic supply. Use Value: 12.9 V clamping threshold ensures PHY ICs remain within absolute maximum ratings during induced lightning surges. |
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-M3/52 | Halogen-free, RoHS-compliant variant; identical electrical specs and SMB package. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure). | Choose SMBJ7.5A-M3/52 only if halogen-free certification is contractually required. |
| SMBJ7.5CA-E3/52 | Bidirectional version; symmetric VBR = 8.33–9.21 V; same VC, PPPM, and package. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, audio), not DC rails. | Select SMBJ7.5CA-E3/52 only for bidirectional signal paths; unidirectional SMBJ7.5A-E3/52 remains optimal for DC power rails. |
Compared with SMBJ7.5CA-E3/52 and SMBJ7.5A-M3/52, the SMBJ7.5A-E3/52 offers the lowest cost and broadest availability for unidirectional DC protection, with no trade-offs in clamping performance, thermal rating, or manufacturability.
Availability
SMBJ7.5A-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 full traceability through Vishay's authorized channel.
Supply support for SMBJ7.5A-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 AEC-Q qualification.
The SMBJ series was engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against ESD, EFT, and surge is non-negotiable.
FAQ
What is the maximum clamping voltage of SMBJ7.5A-E3/52 and under what test condition?
The SMBJ7.5A-E3/52 has a maximum clamping voltage (VC) of 12.9 V, measured at a peak pulse current (IPPM) of 46.5 A using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMBJ7.5A-E3/52 suitable for automotive applications?
SMBJ7.5A-E3/52 is rated for operation from −55 °C to +150 °C and meets MSL Level 1 reflow requirements, but it is not AEC-Q101 qualified. For automotive use, select the HE3-suffixed variant (e.g., SMBJ7.5AHE3_B/H); the SMBJ7.5A-E3/52 is intended for commercial/industrial applications where AEC-Q101 is not mandated.
How does the SMBJ7.5A-E3/52 differ from the SMBJ7.5CA-E3/52?
The SMBJ7.5A-E3/52 is unidirectional with cathode-band polarity marking, while SMBJ7.5CA-E3/52 is bidirectional and unmarked. Both share identical VBR, VC, and PPPM, but SMBJ7.5A-E3/52 must be oriented correctly on DC rails, whereas SMBJ7.5CA-E3/52 protects AC or differential signals without polarity constraints.
What is the thermal resistance and recommended PCB layout for SMBJ7.5A-E3/52?
The SMBJ7.5A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperature under repeated surges, use minimum pad dimensions per Vishay's outline drawing and avoid thermal isolation of the terminals.
Does SMBJ7.5A-E3/52 meet RoHS and lead-free assembly requirements?
Yes - the "E3" suffix denotes RoHS-compliant construction with matte tin-plated leads, qualified for lead-free reflow up to 260 °C peak (MSL Level 1). It satisfies JEDEC JESD201 Class 2 whisker resistance and is compatible with standard SnAgCu solder profiles used in high-volume SMT production.
SMBJ7.5A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ7.5A-E3/52 FAQ
1.How can I place an order for SMBJ7.5A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5A-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 SMBJ7.5A-E3/52 reliable?
The price and inventory of SMBJ7.5A-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 SMBJ7.5A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ7.5A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5A-E3/52?
SMBJ7.5A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5A-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 SMBJ7.5A-E3/52?
For technical support, including SMBJ7.5A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5A-E3/52 requirements.
6.How does Aetrix verify that SMBJ7.5A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5A-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 SMBJ7.5A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ7.5A-E3/52?
All SMBJ7.5A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5A-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 SMBJ7.5A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ7.5A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5A-E3/52 Tags
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