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Taiwan Semiconductor Corporation SMBJ7.5C
- Part No.:
- SMBJ7.5C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5C.pdf
- Description:
- 600W, 9.3V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,983
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Product details
Overview
SMBJ7.5C from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy ESD and surge protection in DC power rails and signal lines. It features a 7.5V working stand-off voltage (VWM), 8.33–10.3V breakdown voltage (VBR) at 1mA test current, and clamps transients to ≤14.3V at 100A peak impulse current (IPP), making it suitable for automotive body electronics and industrial I/O protection.
For engineers reviewing the SMBJ7.5C datasheet, SMBJ7.5C pinout, SMBJ7.5C application, or SMBJ7.5C equivalent, key selection considerations include its bidirectional capability (C suffix), low leakage (<1µA @ 7.5V), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and thermal resistance (RθJA = 55°C/W) for PCB-level surge resilience.
Technical Context
The SMBJ7.5C is a single-die, glass-passivated junction TVS diode optimized for fast response (<1.0ps) to transient overvoltages. Its unidirectional configuration with cathode band marking enables polarity-sensitive placement on DC supply lines, while meeting JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements.
It operates across -55°C to +150°C junction temperature range and supports 100A peak impulse current (10/1000µs waveform) with 14.3V maximum clamping voltage (VC). Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, enabling reliable operation under sustained ambient conditions up to 125°C with appropriate PCB copper area.
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 for safe operation. |
| VBR min/max | 8.33 / 10.3 V @ 1 mA - Breakdown voltage range defining turn-on threshold; ensures consistent clamping onset across production lots. |
| VC @ IPP | 14.3 V @ 100 A - Maximum clamped voltage during 10/1000µs surge; determines protected circuit's peak stress level. |
| PPK | 600 W - Non-repetitive peak pulse power rating; defines single-event energy absorption capacity. |
| ID @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; minimizes quiescent power loss in battery-powered systems. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.090g mass and matte tin-plated leads for J-STD-002 solderability. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking on one end; terminals are anode (unmarked end) and cathode (banded end); lead finish is matte tin per J-STD-002; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to lower-potential side of protected line | Enables unidirectional clamping from cathode to anode during overvoltage events on positive rails. |
| Cathode | Negative terminal; marked with band; connected to higher-potential side or ground reference | Defines polarity-sensitive placement; must be tied to system ground or return path to shunt surge current safely. |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Enables suppression of nanosecond-scale ESD events before downstream ICs experience latch-up or gate oxide damage. |
| ISO 7637-2 compliance | Pulse 1/2a/2b/3a/3b - Validated for automotive load dump and inductive switching immunity without external filtering components. |
| Glass passivated junction | Enhanced reliability vs. epoxy-passivated alternatives - improves long-term stability under thermal cycling and humidity exposure. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 - meets environmental mandates for industrial and automotive OEM supply chains. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12V CAN/LIN bus interface circuits from load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground to clamp transients before they reach transceiver ICs. Use Value: Limits peak voltage to 14.3V during 100A pulses, preventing damage to 16V-rated CAN transceivers and ensuring communication continuity. |
Use Scenario: Safeguarding 24V digital input channels against field-wiring induced surges and EFT bursts. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point to divert surge energy before optocoupler or MCU GPIO. Use Value: Withstands 600W single-event pulses while maintaining <1µA leakage, preserving input threshold accuracy and reducing false triggering. |
| LED Driver Power Supply Input | Medical Equipment Sensor Interface |
Use Scenario: Shielding constant-current LED driver ICs from inductive kickback when driving solenoid-based dimming circuits. IC Role / Device Role / Timing Role: Transient suppressor across input capacitor to absorb stored inductor energy during switch-off. Use Value: Clamps 10/1000µs surges to ≤14.3V, preventing overvoltage shutdown or internal FET failure in buck controller ICs. |
Use Scenario: Protecting low-noise analog front-end amplifiers in patient-monitoring devices from ESD events during cable handling. IC Role / Device Role / Timing Role: Bidirectional-capable TVS (C suffix) placed across differential sensor lines to suppress common-mode transients. Use Value: Sub-1ps response ensures clamping occurs before amplifier input stage exceeds absolute maximum ratings, preserving signal integrity and safety certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA | Bidirectional version with symmetric VBR (8.33–10.3V) in both directions; same VWM and VC specs | Required for AC-coupled or floating signal lines where polarity reversal may occur | Select SMBJ7.5CA only when protecting bidirectional signals (e.g., RS-485, USB D+/D−); SMBJ7.5C is optimal for DC rails with fixed polarity. |
| SAC7.5 | Same VWM (7.5V) but lower PPK (400W); higher VC (15.0V @ 100A); DO-214AA package | Limited to lower-energy transients; not certified to ISO 7637-2 | Use SAC7.5 only in cost-sensitive consumer applications with non-automotive surge profiles; SMBJ7.5C provides superior automotive-grade robustness. |
Compared with SMBJ7.5CA and SAC7.5, the SMBJ7.5C delivers verified 600W surge handling, ISO 7637-2 compliance, and tighter clamping (14.3V), making it the preferred choice for automotive and industrial DC power rail protection where unidirectional polarity is assured.
Availability
SMBJ7.5C is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, LED driver power supplies, and medical sensor interfaces requiring stable component supply and full traceability.
Supply support for SMBJ7.5C 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated Taiwanese manufacturer specializing in discrete semiconductors, including TVS diodes, rectifiers, and MOSFETs, with ISO/TS 16949 and ISO 14001 certifications.
The SMBJ series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing fast response, standardized SMB packaging, and rigorous AEC-Q200-aligned qualification testing.
FAQ
What does the 'C' suffix in SMBJ7.5C indicate?
The 'C' suffix in SMBJ7.5C denotes bidirectional capability - meaning the device functions identically in both forward and reverse bias, unlike unidirectional variants (e.g., SMBJ7.5). This allows use on AC or polarity-agnostic signal lines. The SMBJ7.5C maintains identical VWM (7.5V), VBR (8.33–10.3V), and VC (14.3V) specifications in either direction, confirmed in TSC's SMBJ Series datasheet Rev R2104 Section "Devices for Bipolar Applications".
Is SMBJ7.5C compliant with automotive surge standards?
Yes, SMBJ7.5C meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for transient immunity in 12V automotive systems. This is explicitly stated in the "FEATURES" section of the official datasheet and validated through standardized 10/1000µs waveform testing. Its 600W peak pulse power rating and 14.3V clamping voltage ensure robust protection against load dump and inductive switching events encountered in BCM and ECU designs.
What is the maximum junction temperature rating for SMBJ7.5C?
The SMBJ7.5C has a maximum junction temperature (TJ) of +150°C, as specified in the "ABSOLUTE MAXIMUM RATINGS" table. This rating applies under steady-state and transient conditions, supported by thermal resistance values RθJC = 10°C/W and RθJA = 55°C/W. Derating curves in Figure 2 of the datasheet confirm usable power dissipation down to ambient temperatures of 125°C when mounted on standard FR-4 with recommended pad layout.
How does SMBJ7.5C differ from SMBJ7.5A?
SMBJ7.5C and SMBJ7.5A share identical VWM (7.5V) and package (DO-214AA), but differ in breakdown voltage tolerance and directionality: SMBJ7.5C is bidirectional with VBR 8.33–10.3V, while SMBJ7.5A is unidirectional with tighter VBR range (8.33–9.21V). The 'A' suffix indicates enhanced VBR consistency, whereas 'C' enables AC-line protection. Both exhibit same 14.3V clamping at 100A, per TSC's Electrical Specifications Table on Page 2.
Can SMBJ7.5C be used in place of SMBJ7.5 in existing designs?
Yes - SMBJ7.5C replaces SMBJ7.5 directly in layouts requiring bidirectional protection, as both share identical DO-214AA (SMB) footprint, marking compatibility, and thermal characteristics. However, SMBJ7.5C should not substitute SMBJ7.5 in strictly unidirectional DC applications unless polarity reversal risk exists, since its symmetrical behavior offers no advantage and may increase cost. Pin-to-pin compatibility is confirmed by identical mechanical drawings in Section 7 of the datasheet.
SMBJ7.5C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 44A
- 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 (SMB)
SMBJ7.5C FAQ
1.How can I place an order for SMBJ7.5C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5C 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 reliable?
The price and inventory of SMBJ7.5C 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 is usually 5 days.
3.What payment methods are accepted for SMBJ7.5C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5C?
SMBJ7.5C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5C 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?
For technical support, including SMBJ7.5C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5C requirements.
6.How does Aetrix verify that SMBJ7.5C is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5C 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 meets industry standards.
7.What is the process for return or replacement of SMBJ7.5C?
All SMBJ7.5C units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5C, 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 part is unused and in its original packaging.
Return procedure for SMBJ7.5C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5C Tags
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