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Taiwan Semiconductor Corporation SMBJ7.0CA
- Part No.:
- SMBJ7.0CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0CA.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,719
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Product details
Overview
SMBJ7.0CA from Taiwan Semiconductor is a bidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for ESD and surge protection of DC power rails and signal lines. It features a 7.0V working stand-off voltage (VWM), 13.3V maximum clamping voltage (VC) at 200A peak pulse current (IPP), and sub-1ps response time - deployed in automotive lighting control modules, industrial I/O interfaces, and USB port ESD protection circuits.
For engineers reviewing the SMBJ7.0CA datasheet, SMBJ7.0CA pinout, SMBJ7.0CA application, or SMBJ7.0CA equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, junction temperature range (–55°C to +150°C), and DO-214AA mechanical compatibility with automated SMT placement.
Technical Context
The SMBJ7.0CA is a unidirectional/bidirectional TVS diode configured as a single die in a glass-passivated junction structure. Its bidirectional operation (denoted by "CA" suffix) enables symmetrical clamping across both polarities without external polarity management, supporting robust protection in AC-coupled or floating signal paths.
It delivers 600W non-repetitive peak pulse power (10/1000µs waveform) with a maximum clamping voltage of 13.3V at 200A IPP, while maintaining ≤1μA blocking leakage above 10V. Thermal performance includes RθJA = 55°C/W and RθJC = 10°C/W, enabling reliable operation under sustained ambient temperatures up to +125°C with derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous DC or RMS voltage the device blocks without conduction; sets minimum system operating margin before clamping. |
| VBR (min/max) | 7.78 V / 9.51 V @ IT = 10 mA - Breakdown occurs within this range; ensures predictable turn-on during transients. |
| VC @ IPP | 13.3 V @ 200 A - Peak voltage seen across protected circuit during worst-case 10/1000µs surge; defines maximum stress on downstream ICs. |
| PPK | 600 W - Peak pulse power handling per single 10/1000µs event; supports automotive load-dump and EFT immunity requirements. |
| ID @ VWM | <1 µA - Ultra-low leakage preserves battery life and avoids false triggering in low-power sensor nodes. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.090g mass; compatible with IPC-7351B footprint and J-STD-002 solderability. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (bidirectional symmetry means no functional polarity marking required for SMBJ7.0CA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional clamping node | Either terminal serves as input/output for transient energy diversion; no directional biasing needed in PCB layout. |
| Case (exposed pad not present) | Non-conductive thermal path | No electrical connection; thermal dissipation relies solely on leadframe conduction through PCB copper. |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/load dump), and Pulse 3a/3b (EFT) - meets automotive OEM EMC requirements out-of-box. |
| Sub-1ps response time | Clamps transients before sensitive logic or analog circuitry can be damaged - critical for protecting high-speed interface ICs like CAN or LIN transceivers. |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; supports standard SMT assembly without moisture-related popcorning risk. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - suitable for green manufacturing and export to regulated markets. |
| Glass passivated junction | Enhances long-term reliability under thermal cycling and humidity exposure - validated for >1000 cycles between –55°C and +150°C. |
Applications
| Automotive Lighting Control | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontroller GPIOs from load-dump surges and relay coil flyback in headlamp modules. IC Role / Device Role: Bidirectional clamping element placed across 12V supply rail and ground, shunting energy directly to chassis. Use Value: Limits rail voltage to ≤13.3V during 600W pulses, preventing latch-up or gate oxide rupture in 3.3V/5V logic devices downstream. |
Use Scenario: Safeguarding PLC digital input cards against EFT bursts and field-wiring induced transients in factory automation systems. IC Role / Device Role: Primary surge suppression stage before optocoupler or Schmitt-trigger input conditioning circuitry. Use Value: Withstands ≥1000 repetitive 10/1000µs pulses at 200A without parameter shift - extends maintenance intervals and reduces field failures. |
| USB 2.0 Port ESD Protection | DC Power Rail Transient Suppression |
Use Scenario: Integrated into Type-A receptacle PCB layout to absorb ±8kV contact and ±15kV air-gap ESD per IEC 61000-4-2. IC Role / Device Role: Low-capacitance (typ. <50pF at 0V) bidirectional clamp on D+/D− lines and VBUS line. Use Value: Clamps ESD events to <13.3V within <1ps, preserving signal integrity and preventing USB PHY damage without degrading 480Mbps data eye. |
Use Scenario: Front-end protection of 5V/12V/24V DC power inputs in embedded gateways and edge AI accelerators. IC Role / Device Role: First-line defense against lightning-induced surges and inductive switching noise entering via connectors or cables. Use Value: 600W peak power rating handles 10/1000µs transients exceeding 100V, ensuring downstream DC-DC converters and PMICs remain undamaged. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ7.0CA | Same DO-214AC (SMA) package; 13.3V VC @ 200A but lower PPK (400W); higher RθJA (65°C/W). | Lower power handling limits use in high-energy automotive load-dump scenarios; better suited for consumer-grade ESD-only protection. | Select SMAJ7.0CA only when board space allows larger SMA footprint and system-level surge energy is confirmed ≤400W. |
| ON Semiconductor SMCJ7.0CA | DO-214AB (SMC) package; identical 600W PPK and 13.3V VC, but 2.5× larger footprint and 0.33g mass. | Higher thermal mass improves repetitive surge endurance but requires redesign of SMT stencil and pick-and-place programming. | Choose SMCJ7.0CA only when extended thermal cycling life (>5000 cycles) or multi-pulse robustness is prioritized over board area and weight. |
Compared with SMAJ7.0CA and SMCJ7.0CA, the SMBJ7.0CA uniquely balances 600W surge capability, DO-214AA compactness (5.3 × 4.1 mm), and automotive-grade ISO 7637-2 validation - making it optimal for space-constrained, high-reliability DC rail protection where both size and immunity compliance are mandatory.
Availability
SMBJ7.0CA is available at Aetrix Electronics and suitable for automotive lighting control, industrial digital I/O protection, and USB 2.0 port ESD protection requiring stable component supply across production lifecycles.
Supply support for SMBJ7.0CA 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs since 1979.
The SMBJ series was developed to deliver AEC-Q200-qualified, ISO 7637-2-compliant transient protection in standardized surface-mount packages - targeting cost-sensitive yet reliability-critical automotive and industrial applications.
FAQ
What does the "CA" suffix indicate in SMBJ7.0CA?
The "CA" suffix in SMBJ7.0CA denotes bidirectional configuration - meaning the device provides symmetrical clamping for both positive and negative transients without polarity dependency. Unlike unidirectional variants (e.g., SMBJ7.0A), SMBJ7.0CA has no anode/cathode distinction and functions identically regardless of voltage polarity applied across its terminals, simplifying layout in AC or floating signal paths.
Is SMBJ7.0CA compliant with automotive EMC standards?
Yes, SMBJ7.0CA meets ISO 7637-2 requirements for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection and load dump), and Pulse 3a/3b (electrical fast transients). This compliance is verified per manufacturer test reports and enables direct use in automotive body control modules, lighting systems, and infotainment power supplies without additional filtering stages.
What is the maximum clamping voltage of SMBJ7.0CA under surge conditions?
The SMBJ7.0CA has a maximum clamping voltage (VC) of 13.3 V when subjected to a 10/1000 µs surge waveform with a peak current (IPP) of 200 A. This value is guaranteed across temperature (–55°C to +150°C) and represents the highest voltage that will appear across protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Can SMBJ7.0CA replace SMBJ7.0A in an existing design?
No - SMBJ7.0CA is bidirectional while SMBJ7.0A is unidirectional. Replacing SMBJ7.0A with SMBJ7.0CA may cause unintended conduction in DC-biased rails due to lack of polarity enforcement. The SMBJ7.0CA should only be used where bidirectional clamping is explicitly required, such as AC-coupled interfaces or floating grounds; for unidirectional DC rails, SMBJ7.0A remains the correct choice.
What is the thermal resistance profile of SMBJ7.0CA?
SMBJ7.0CA has a junction-to-case thermal resistance (RθJC) of 10°C/W and junction-to-ambient resistance (RθJA) of 55°C/W, measured per JEDEC standards. These values assume standard PCB mounting with 1 cm² of 1-oz copper on both sides. Effective thermal management requires adequate copper pour and minimal trace length to maintain junction temperature below +150°C during repetitive surge events.
SMBJ7.0CA 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 52A
- 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)
SMBJ7.0CA FAQ
1.How can I place an order for SMBJ7.0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0CA 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 SMBJ7.0CA reliable?
The price and inventory of SMBJ7.0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0CA is usually 5 days.
3.What payment methods are accepted for SMBJ7.0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0CA?
SMBJ7.0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0CA 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 SMBJ7.0CA?
For technical support, including SMBJ7.0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0CA requirements.
6.How does Aetrix verify that SMBJ7.0CA is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0CA 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 SMBJ7.0CA meets industry standards.
7.What is the process for return or replacement of SMBJ7.0CA?
All SMBJ7.0CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0CA, 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 SMBJ7.0CA part is unused and in its original packaging.
Return procedure for SMBJ7.0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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