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Taiwan Semiconductor Corporation SMBJ11CH
- Part No.:
- SMBJ11CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11CH.pdf
- Description:
- 600W, 13.6V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,097
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Product details
Overview
SMBJ11CH from Taiwan Semiconductor is a unidirectional transient voltage suppressor diode (TVS) in DO-214AA (SMB) package, designed for automotive-grade ESD and surge protection. It features a 11 V working stand-off voltage (VWM), 12.2–14.9 V breakdown voltage (VBR), 20.1 V maximum clamping voltage (VC) at 31 A peak pulse current, and 600 W peak pulse power rating per 10/1000 µs waveform - deployed in automotive lighting control modules to protect CAN transceiver inputs from load-dump-induced transients.
For engineers reviewing the SMBJ11CH datasheet, SMBJ11CH pinout, SMBJ11CH application, or SMBJ11CH equivalent, key selection criteria include clamping voltage margin relative to IC VCC rail, leakage current at operating voltage, AEC-Q101 qualification status, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and thermal resistance (RθJA = 55 °C/W) for PCB layout derating.
Technical Context
The SMBJ11CH operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-1 ps response time and low leakage (<1 µA at 11 V). Its clamping behavior follows IEEE C62.35 standards, with defined VBR test current of 1 mA and guaranteed VC measured at IPP = 31 A under 10/1000 µs waveform.
Thermally, it supports junction temperatures from –55 °C to +150 °C, with RθJC = 10 °C/W and RθJA = 55 °C/W. The device is rated for 100 A non-repetitive forward surge (IFSM, 8.3 ms half-sine) and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse voltage before clamping begins; sets upper limit for system operating voltage compatibility |
| VBR min/max | 12.2 / 14.9 V @ IT = 1 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM |
| VC @ IPP | 20.1 V @ 31 A - Clamping voltage during 10/1000 µs surge; defines worst-case overvoltage seen by protected IC |
| PPK | 600 W - Peak pulse power handling per standard waveform; determines survivability against ISO 7637-2 Pulse 5a |
| ID @ VWM | <1 µA - Low leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes |
| TJ max | +150 °C - Enables operation in under-hood automotive environments without thermal shutdown |
| RθJA | 55 °C/W - Guides minimum copper area and thermal via count required for sustained 3 W dissipation at TA = 85 °C |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-banded unidirectional configuration. Case meets UL 94V-0, matte tin-plated leads, 0.090 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; establishes clamping reference for protected line |
| Cathode | Protected line input | Connected to I/O line (e.g., CAN_H); conducts surge current to ground when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use across temperature, humidity, and mechanical stress profiles per JESD47 |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without degradation |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift in humid environments |
| Fast response time | <1.0 ps - Limits voltage overshoot before clamping engages, critical for protecting fast-edge digital interfaces |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing and end-of-life processing |
Applications
| Automotive Lighting Control | Body Control Module (BCM) Inputs |
|---|---|
Use Scenario: Protecting LED driver enable lines and LIN bus transceivers from load-dump spikes during headlamp switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN data line and chassis ground to clamp transients below 20.1 V. Use Value: Prevents latch-up or permanent damage to LIN transceivers rated for 18 V absolute maximum, maintaining communication integrity during 12 V system surges. | Use Scenario: Safeguarding microcontroller GPIOs connected to door lock actuators and window motor drivers. IC Role / Device Role / Timing Role: SMBJ11CH installed on each actuator control line to absorb inductive kickback from relay coils. Use Value: Eliminates need for external snubbers or RC networks, reducing BOM count while meeting ISO 7637-2 Pulse 2b immunity requirements. |
| Infotainment Display Interface | Power Supply Input Protection |
Use Scenario: Shielding MIPI DSI clock and data lanes from ESD events during assembly and field operation. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on each differential pair, referenced to local ground plane. Use Value: Maintains signal integrity with <10 pF junction capacitance at 0 V bias, avoiding timing skew or jitter in 1.5 Gbps video links. | Use Scenario: Front-end protection for 12 V DC-DC converter input in telematics units exposed to battery transients. IC Role / Device Role / Timing Role: Primary surge clamp ahead of input filter capacitor, sized for 600 W peak energy absorption. Use Value: Sustains operation through 10/1000 µs pulses up to 31 A without degradation, extending converter lifetime in stop-start vehicle systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ11CA | Bidirectional configuration; VBR = 12.2–13.5 V; VC = 18.2 V @ 34 A; same DO-214AA package | Supports AC-coupled lines or bidirectional buses (e.g., RS-485); not suitable where polarity-sensitive unidirectional clamping is required | Select SMAJ11CA only if circuit requires symmetrical clamping in both directions and can accommodate lower VC |
| ON Semiconductor 1.5SMC11AH | Same unidirectional function; VBR = 12.2–13.5 V; VC = 18.2 V @ 34 A; DO-214AB (SMC) package (larger footprint) | Higher power rating (1500 W) but requires larger PCB area; thermal performance differs due to larger case size | Choose 1.5SMC11AH only when higher surge margin is needed and board space allows SMC footprint |
Compared with SMBJ11CH, SMAJ11CA offers bidirectional clamping at lower VC but lacks AEC-Q101 validation, while 1.5SMC11AH provides higher PPK in a larger package - making SMBJ11CH optimal for space-constrained, automotive-qualified unidirectional protection.
Availability
SMBJ11CH is available at Aetrix Electronics and suitable for automotive lighting control, body electronics, infotainment interface protection, and power supply input surge suppression requiring stable component supply across production lifecycles.
Supply support for SMBJ11CH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The SMBJH series is part of TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for robust transient immunity in 12 V/24 V automotive subsystems subject to ISO 7637-2 and IEC 61000-4-2 stress conditions.
FAQ
What is the clamping voltage of SMBJ11CH and how is it measured?
The SMBJ11CH has a maximum clamping voltage (VC) of 20.1 V, measured at a peak pulse current (IPP) of 31 A using the standardized 10/1000 µs double-exponential waveform per IEC 61000-4-5. This value represents the highest voltage that appears across the SMBJ11CH terminals during a surge event, ensuring downstream ICs see no more than 20.1 V even under full-rated transient stress.
Is SMBJ11CH qualified for automotive applications?
Yes, SMBJ11CH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements. It is rated for junction temperatures from –55 °C to +150 °C and passes JESD201 Class 2 whisker testing and J-STD-020 Moisture Sensitivity Level 1 - confirming suitability for under-hood and cabin automotive modules.
What does the "CH" suffix indicate in SMBJ11CH?
The "CH" suffix denotes a unidirectional TVS diode with cathode band marking, intended for DC-biased protection applications such as power rails or single-ended data lines. It distinguishes SMBJ11CH from bidirectional variants (e.g., SMBJ11CA), which use "CAH" and clamp symmetrically in both polarities.
How does SMBJ11CH compare to SMBJ11AH?
SMBJ11AH has tighter VBR tolerance (12.2–13.5 V vs. 12.2–14.9 V for SMBJ11CH) and lower clamping voltage (18.2 V vs. 20.1 V), but SMBJ11CH offers higher surge current capability (31 A vs. 34 A) and identical 600 W PPK rating. Both share DO-214AA packaging and AEC-Q101 qualification; SMBJ11CH is preferred where broader VBR distribution is acceptable and higher VC margin is tolerable.
Can SMBJ11CH be used in bidirectional signal lines like RS-485?
No - SMBJ11CH is unidirectional and must be connected with correct polarity (cathode to protected line, anode to ground). For bidirectional lines, a bidirectional variant such as SMBJ11CA or SMAJ11CA is required. Using SMBJ11CH on AC-coupled or differential lines risks open-circuit failure during negative transients.
SMBJ11CH 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 31A
- 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)
SMBJ11CH FAQ
1.How can I place an order for SMBJ11CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11CH 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 SMBJ11CH reliable?
The price and inventory of SMBJ11CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ11CH is usually 5 days.
3.What payment methods are accepted for SMBJ11CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11CH?
SMBJ11CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11CH 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 SMBJ11CH?
For technical support, including SMBJ11CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11CH requirements.
6.How does Aetrix verify that SMBJ11CH is sourced from the original manufacturer or authorized distributors?
All SMBJ11CH 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 SMBJ11CH meets industry standards.
7.What is the process for return or replacement of SMBJ11CH?
All SMBJ11CH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11CH, 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 SMBJ11CH part is unused and in its original packaging.
Return procedure for SMBJ11CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ11CH Tags
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