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Taiwan Semiconductor Corporation SMBJ5.0CAH
- Part No.:
- SMBJ5.0CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ5.0CAH.pdf
- Description:
- 600W, 6.7V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,934
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Product details
Overview
SMBJ5.0CAH from Taiwan Semiconductor is a bidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 5.0V working stand-off voltage (VWM), 6.4–7.0V breakdown voltage (VBR), and 9.2V maximum clamping voltage (VC) at 800A peak pulse current - designed for ESD and electrical fast transient protection in automotive lighting and power supply input stages.
For engineers reviewing the SMBJ5.0CAH datasheet, SMBJ5.0CAH pinout, SMBJ5.0CAH application, or SMBJ5.0CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, <1.0ps response time, and ≤1μA leakage above 10V - critical for robust automotive and industrial interface protection.
Technical Context
The SMBJ5.0CAH is a bipolar junction TVS diode optimized for bidirectional transient suppression without polarity dependency. Its glass-passivated die ensures stable VBR tolerance (±5% min–max spread) and low leakage (<1μA at VWM), while meeting JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, enabling reliable operation up to TJ = +150°C. It delivers 600W non-repetitive peak pulse power (10/1000µs waveform) with clamping voltage tightly controlled at 9.2V under 800A surge - essential for protecting downstream 5V logic and CAN/LIN transceivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage trip threshold. |
| VBR @ IT=10mA | 6.4–7.0 V - Breakdown voltage range confirming tight tolerance for predictable turn-on during transients. |
| VC @ IPP=800A | 9.2 V - Clamping voltage under worst-case 10/1000µs surge; limits stress on protected 5V ICs to safe margin. |
| PPK | 600 W - Peak pulse power rating per 10/1000µs waveform; defines single-event surge energy handling capacity. |
| ID @ VWM | <1 µA - Ultra-low leakage at rated stand-off voltage; avoids parasitic loading in high-impedance sensor or bias networks. |
| Response Time | <1.0 ps - Sub-picosecond junction response enables effective suppression of ESD and EFT events before damage occurs. |
| TJ Max | +150 °C - Maximum junction temperature rating supporting under-hood automotive deployment and high-power PCB layouts. |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; symmetrical bidirectional configuration means both terminals are electrically identical - no anode/cathode orientation required in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bidirectional Surge Terminal | Connects to protected line (e.g., CAN_H or power rail); same electrical behavior as Terminal 2 due to symmetric structure. |
| Terminal 2 | Bidirectional Surge Terminal | Connects to reference plane (e.g., chassis ground or power return); interchangeable with Terminal 1 in layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for front-end protection in ADAS and body control modules. |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) - meets OEM-level EMC immunity requirements. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal stress and humidity exposure - critical for 15+ year automotive service life. |
| Moisture sensitivity level 1 | No baking or special handling required prior to reflow; compatible with standard SMT assembly lines without yield loss. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives - supports green manufacturing and end-of-life recycling mandates. |
Applications
| Automotive Lighting Systems | Industrial Sensor Interfaces |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontrollers from load-dump transients during headlamp switching in 12V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across power input pins of LED controller ICs to limit voltage excursions below 10V. Use Value: Prevents latch-up or gate oxide damage in 5V-rated drivers by clamping surges to 9.2V at 800A - enabling direct integration without external series impedance. | Use Scenario: Shielding analog front-end amplifiers and ADC inputs in factory-floor pressure/temperature sensors exposed to relay-induced EFT. IC Role / Device Role / Timing Role: Fast-response shunt protector on signal lines between sensor element and instrumentation amplifier. Use Value: Limits transient-induced offset drift and saturation by suppressing sub-10ns ESD spikes before they propagate into precision signal chain. |
| Automotive CAN/LIN Bus Nodes | DC Power Supply Input Protection |
Use Scenario: Safeguarding CAN transceiver PHY layers against coupled transients from adjacent high-current circuits in infotainment ECUs. IC Role / Device Role / Timing Role: Line-to-ground TVS on CAN_H/CAN_L differential pair, leveraging bidirectional symmetry for common-mode surge suppression. Use Value: Maintains bus integrity during ISO 7637-2 Pulse 2a (battery disconnect) by clamping to 9.2V without forward conduction - preserving differential signaling margins. | Use Scenario: Input-stage protection for 5V DC-DC converters in telecom power shelves subjected to lightning-induced surges on primary-side rails. IC Role / Device Role / Timing Role: Primary surge clamp on unregulated 5V input rail upstream of converter controller IC. Use Value: Absorbs 600W transient energy without failure, preventing overvoltage shutdown or MOSFET avalanche in buck controller ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0A | Unidirectional; requires correct polarity placement; VF = 3.5V forward drop at 50A. | Only suitable where polarity is fixed and reverse conduction must be blocked - not for AC or differential bus lines. | Select SMBJ5.0A only when unidirectional blocking is required and layout allows strict polarity alignment. |
| P6SMB5.0CA | Same DO-214AA package and 600W rating; VBR = 6.4–7.3V; VC = 9.6V at 800A - slightly higher clamping than SMBJ5.0CAH's 9.2V. | Compatible in footprint and function but exhibits 0.4V higher clamping voltage - may reduce safety margin for 5V logic interfaces. | Use P6SMB5.0CA where second-source availability is prioritized and 0.4V clamping margin is acceptable. |
Compared with SMBJ5.0CAH, SMBJ5.0A lacks bidirectional symmetry and demands precise orientation, while P6SMB5.0CA offers identical form factor but trades 0.4V higher clamping voltage for broader vendor support - making SMBJ5.0CAH optimal for space-constrained, polarity-agnostic 5V automotive nodes requiring minimal clamping overshoot.
Availability
SMBJ5.0CAH is available at Aetrix Electronics and suitable for automotive lighting systems, industrial sensor interfaces, CAN/LIN bus nodes, and DC power supply input protection requiring stable component supply across extended production lifecycles.
Supply support for SMBJ5.0CAH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs - headquartered in Hsinchu, Taiwan, with global distribution and AEC-Q101 validation capabilities.
The SMBJH series was developed specifically for automotive-grade transient suppression, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and tight parametric control - targeting front-end protection in ECUs, lighting, and body electronics.
FAQ
What does the 'CAH' suffix indicate in SMBJ5.0CAH?
The 'CAH' suffix in SMBJ5.0CAH denotes a bidirectional TVS diode in the SMBJH series with AEC-Q101 qualification and halogen-free construction. Unlike unidirectional variants (e.g., SMBJ5.0H), the 'C' confirms bipolar functionality - enabling symmetrical clamping on either polarity - while 'AH' specifies tighter VBR tolerance (6.4–7.0V vs. 6.4–7.3V) and halogen-free compliance per IEC 61249-2-21. This makes SMBJ5.0CAH ideal for differential signal lines like CAN or AC-coupled interfaces.
Is SMBJ5.0CAH suitable for protecting 5V USB interfaces against ESD?
Yes, SMBJ5.0CAH is suitable for 5V USB interface protection, provided layout constraints allow its DO-214AA footprint and system-level testing validates clamping performance. With 9.2V clamping at 800A and <1.0ps response, it suppresses IEC 61000-4-2 Level 4 (15kV air/8kV contact) ESD events effectively. However, its 600W rating targets higher-energy transients - for pure ESD-only use, lower-capacitance TVS arrays may offer better signal integrity; SMBJ5.0CAH excels when combined ESD and load-dump protection is needed in the same node.
How does SMBJ5.0CAH differ from SMBJ5.0A in practical circuit design?
SMBJ5.0CAH is bidirectional and polarity-insensitive, allowing placement across any two points needing symmetrical surge suppression - such as CAN_H/CAN_L or AC signal lines. In contrast, SMBJ5.0A is unidirectional and must be oriented with cathode toward the protected circuit's positive rail; incorrect placement causes forward conduction and potential failure. SMBJ5.0CAH eliminates orientation checks during automated assembly and supports differential transient suppression without additional components - a key advantage in space-constrained automotive modules where SMBJ5.0CAH replaces dual unidirectional devices.
Does SMBJ5.0CAH meet ISO 7637-2 Pulse 1 requirements for 12V automotive systems?
Yes, SMBJ5.0CAH is explicitly rated to meet ISO 7637-2 Pulse 1 (inductive load dump) requirements for 12V automotive systems. Its 600W peak pulse power rating, 9.2V clamping voltage at 800A, and AEC-Q101 qualification confirm compliance with Pulse 1's −150V/0.1Ω/50ms waveform. When placed across the input of a 12V ECU power stage, SMBJ5.0CAH limits voltage to ≤9.2V - well below the 36V absolute maximum rating of most 12V-input regulators - ensuring robust protection without derating or parallel staging.
What is the maximum steady-state power dissipation (PD) of SMBJ5.0CAH at 25°C ambient?
The maximum steady-state power dissipation (PD) of SMBJ5.0CAH at TA = 25°C is 3 W, as specified in the Absolute Maximum Ratings table. This value reflects continuous DC or low-frequency power handling - not transient surge capability. In normal operation, SMBJ5.0CAH draws negligible current below VWM (5.0V), so actual PD remains near zero. The 3W rating primarily supports thermal design margin during sustained overvoltage conditions or elevated ambient temperatures; for typical 5V rail protection, thermal design focuses on transient energy absorption rather than steady-state dissipation.
SMBJ5.0CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 68A
- 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 (SMB)
SMBJ5.0CAH FAQ
1.How can I place an order for SMBJ5.0CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ5.0CAH 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 SMBJ5.0CAH reliable?
The price and inventory of SMBJ5.0CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ5.0CAH is usually 5 days.
3.What payment methods are accepted for SMBJ5.0CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ5.0CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ5.0CAH?
SMBJ5.0CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ5.0CAH 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 SMBJ5.0CAH?
For technical support, including SMBJ5.0CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ5.0CAH requirements.
6.How does Aetrix verify that SMBJ5.0CAH is sourced from the original manufacturer or authorized distributors?
All SMBJ5.0CAH 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 SMBJ5.0CAH meets industry standards.
7.What is the process for return or replacement of SMBJ5.0CAH?
All SMBJ5.0CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ5.0CAH, 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 SMBJ5.0CAH part is unused and in its original packaging.
Return procedure for SMBJ5.0CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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