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Vishay General Semiconductor - Diodes Division SMBJ7.5CHE3/52
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- Part No.:
- SMBJ7.5CHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CHE3/52.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,285
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Product details
Overview
SMBJ7.5CHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount 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, 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 on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMBJ7.5CHE3/52 datasheet, SMBJ7.5CHE3/52 pinout, SMBJ7.5CHE3/52 application, or SMBJ7.5CHE3/52 equivalent, key selection criteria include its AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.55), 100 °C/W junction-to-ambient thermal resistance, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly under J-STD-002.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds VBR, diverting transient energy to ground while limiting downstream voltage to ≤12.9 V. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<100 µA at VWM), and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak tolerance.
The device is rated for repetitive surge duty cycle ≤0.01 %, supports 100 A non-repetitive forward surge (8.3 ms half-sine), and exhibits a +0.067 %/°C temperature coefficient of VBR. Its SMB package provides mechanical robustness and thermal performance validated on 5.0 mm × 5.0 mm copper pads per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (min/max) | 8.33 V / 9.21 V at IT = 1.0 mA - Confirmed avalanche onset range; ensures reliable triggering across temperature and lot variation. |
| VC @ IPPM | 12.9 V at 46.5 A - Clamped voltage during 10/1000 µs transient; determines maximum stress on protected IC inputs. |
| PPPM | 600 W - Peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω). |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); supports inrush and load-dump immunity in automotive 12 V systems. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood environments with derated power above 25 °C. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard PCB pad; informs layout cooling requirements for sustained dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to protected circuit's ground or low-side return path; completes clamping loop during transients. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail or CAN_H); conducts avalanche current when VREV > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors per stress test requirements. |
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy transients such as ISO 7637-2 Load Dump pulses without degradation or failure. |
| Low clamping voltage (12.9 V) | Minimizes overvoltage exposure to downstream 5 V or 3.3 V logic, reducing risk of latch-up or gate oxide damage. |
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime, critical for long-term reliability in industrial and automotive deployments. |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free reflow assembly without moisture-induced popcorning or delamination. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs in engine control units (ECUs) against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery feed and LDO input, conducting only during overvoltage events. Use Value: Limits peak voltage to ≤12.9 V, preventing damage to 16 V-rated regulators and enabling compliance with ISO 16750-2 Pulse 5a/b. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (with local grounding) shunting ESD and inductive switching spikes on sensor output traces. Use Value: Clamps fast transients (<1 ns rise time) below 15 V, preserving signal integrity and avoiding ADC saturation or op-amp rail-to-rail clipping. |
| Telecom Interface Protection | Consumer Device USB Port Protection |
|
Use Scenario: Shielding RS-485 transceiver I/O pins in base station backhaul modules from lightning-induced surges. IC Role / Device Role / Timing Role: Paired unidirectional SMBJ7.5CHE3/52 devices on differential lines (A/B), referenced to local ground plane. Use Value: Delivers 600 W surge handling with <1 ps response, maintaining signal eye diagram integrity during IEC 61000-4-5 4 kV tests. |
Use Scenario: Adding secondary overvoltage protection on VBUS line of USB 2.0 ports in smart home hubs after primary fuse and polyfuse. IC Role / Device Role / Timing Role: Standby-mode TVS connected between VBUS and GND, activated only during overvoltage faults exceeding 7.5 V. Use Value: Prevents catastrophic failure of USB controller ICs during hot-plug surges or adapter fault conditions, with no standby current draw. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5AHE3/52 | No AEC-Q101 qualification; identical electrical specs and packaging. | Restricted to commercial-grade automotive subsystems (e.g., infotainment) where qualification is not mandated. | Select SMBJ7.5AHE3/52 only if AEC-Q101 documentation and test reports are not required for your program. |
| SMAJ7.5HE3/52 | Lower 400 W PPPM; SMA (DO-214AC) package with smaller footprint and higher RθJA (140 °C/W). | Suitable for space-constrained consumer PCBs but not for high-energy automotive transients requiring 600 W margin. | Choose SMAJ7.5HE3/52 only when board area is critical and surge threat level is limited to IEC 61000-4-2 ±8 kV contact discharge. |
Compared with SMBJ7.5AHE3/52, the SMBJ7.5CHE3/52 adds AEC-Q101 validation for mission-critical automotive use; versus SMAJ7.5HE3/52, it delivers 50 % higher surge power and lower thermal resistance - essential for under-hood reliability and sustained transient immunity.
Availability
SMBJ7.5CHE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom infrastructure equipment, and consumer USB power protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMBJ7.5CHE3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness, low clamping, and qualification compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ7.5CHE3/52 at its rated peak pulse current?
The SMBJ7.5CHE3/52 has a maximum clamping voltage (VC) of 12.9 V at its specified peak pulse current (IPPM) of 46.5 A, measured using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across temperature and manufacturing lots, and directly determines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ7.5CHE3/52 maintains this clamping performance while delivering 600 W peak pulse power.
Is SMBJ7.5CHE3/52 suitable for automotive applications?
Yes, SMBJ7.5CHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HE3". It undergoes stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life per AEC-Q101 Rev D. The SMBJ7.5CHE3/52 is commonly deployed in engine control modules, body control units, and ADAS camera power supplies where load dump and jump-start immunity are required. Its RoHS-compliant construction and MSL Level 1 rating further support automotive manufacturing flow.
What does the "HE3" suffix indicate in SMBJ7.5CHE3/52?
The "HE3" suffix in SMBJ7.5CHE3/52 denotes RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from commercial-grade variants like "E3" or "AHE3". The "H" prefix confirms automotive qualification status, while "E3" specifies matte tin plating and JESD201 Class 2 whisker resistance. This suffix is tied to specific test reports and process controls - the SMBJ7.5CHE3/52 must be sourced with this exact marking to guarantee qualification compliance for automotive programs.
How does SMBJ7.5CHE3/52 differ from bidirectional TVS diodes like SMBJ7.5CHE3/52CA?
The SMBJ7.5CHE3/52 is unidirectional and intended for DC-biased lines (e.g., 12 V power rails), conducting only in reverse avalanche mode. In contrast, a bidirectional variant (e.g., SMBJ7.5CHE3/52CA) would suppress transients on AC or floating lines like RS-485 or audio paths, with symmetrical clamping in both polarities. The SMBJ7.5CHE3/52 lacks bidirectional capability - its cathode band marks polarity, and forward conduction is not suppressed. Using it in place of a CA part on an AC signal risks forward conduction and failure.
What is the thermal resistance and recommended PCB layout for SMBJ7.5CHE3/52?
The SMBJ7.5CHE3/52 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, as defined in the Vishay datasheet. To achieve this rating, the PCB layout must use minimum recommended pad dimensions, avoid thermal relief on thermal pads, and ensure uninterrupted copper pour beneath the device. For sustained power dissipation, additional copper area or internal planes are advised - the SMBJ7.5CHE3/52 is not intended for continuous DC power handling but for transient energy absorption.
SMBJ7.5CHE3/52 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ7.5CHE3/52 FAQ
1.How can I place an order for SMBJ7.5CHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CHE3/52 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 SMBJ7.5CHE3/52 reliable?
The price and inventory of SMBJ7.5CHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5CHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CHE3/52?
SMBJ7.5CHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CHE3/52 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 SMBJ7.5CHE3/52?
For technical support, including SMBJ7.5CHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CHE3/52 requirements.
6.How does Aetrix verify that SMBJ7.5CHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CHE3/52 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 SMBJ7.5CHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CHE3/52?
All SMBJ7.5CHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CHE3/52, 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 SMBJ7.5CHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ7.5CHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CHE3/52 Tags
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