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Taiwan Semiconductor Corporation SMBJ11CAH
- Part No.:
- SMBJ11CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11CAH.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,257
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Product details
Overview
SMBJ11CAH from Taiwan Semiconductor is a bidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 11V working stand-off voltage (VWM), 12.2–13.5V breakdown voltage (VBR), and 18.2V maximum clamping voltage (VC) at 34A peak pulse current - designed for automotive-grade ESD and electrical fast transient protection in power supply rails and data lines.
For engineers reviewing the SMBJ11CAH datasheet, SMBJ11CAH pinout, SMBJ11CAH application, or SMBJ11CAH equivalent, key selection criteria include bidirectional polarity, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, and <1µA leakage above 10V - critical for robust front-end protection in automotive body control modules and infotainment interfaces.
Technical Context
The SMBJ11CAH is a unidie, glass-passivated junction TVS diode optimized for bidirectional transient suppression. It operates symmetrically in both polarities due to its CAH suffix designation, meeting stringent automotive immunity standards including ISO 7637-2 without external polarity management.
Its thermal design supports 150°C maximum junction temperature and features RθJC = 10°C/W and RθJA = 55°C/W, enabling reliable operation under high ambient conditions when mounted on standard 1-oz copper PCBs with recommended pad layout per DO-214AA outline.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous DC or RMS voltage the device blocks without conduction |
| VBR min/max | 12.2 V / 13.5 V @ 1 mA - Confirmed breakdown threshold range ensuring predictable turn-on during transients |
| VC @ IPP | 18.2 V @ 34 A - Clamping voltage limits downstream IC stress during 10/1000µs surge events |
| PPK | 600 W - Peak pulse power rating defines transient energy absorption capability |
| IR @ VWM | <1 µA - Ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| Response time | <1.0 ps - Enables suppression before sensitive circuitry sustains damage from ESD or EFT |
| TJ max | +150 °C - Supports under-hood automotive deployment without derating at full power |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; symmetrical bidirectional terminals require no polarity assignment in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Transient current path | Both terminals conduct equally during positive or negative surges - no directional routing needed |
| Cathode band (marking) | Polarity indicator | Visible band denotes terminal 1 per DO-214AA mechanical drawing; irrelevant for bidirectional function but required for traceability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD-HBM/MM |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) without degradation |
| Glass passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow - compatible with standard SMT assembly processes |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller GPIOs from load dump and relay coil flyback in door module ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt transients before reaching ASIC inputs. Use Value: Limits voltage to ≤18.2V during 34A 10/1000µs pulses, preventing latch-up or oxide breakdown in 3.3V/5V logic interfaces. | Use Scenario: Safeguarding 24V digital input channels against field-wiring induced surges and EFT bursts in factory automation controllers. IC Role / Device Role / Timing Role: Primary overvoltage clamp across input terminals, operating in parallel with optocoupler input stage. Use Value: Sub-1ps response ensures clamping activation before 50ns EFT edges propagate into isolation barrier, maintaining functional safety integrity. |
| LED Headlamp Driver Supply Rail | USB-C Port ESD Protection |
Use Scenario: Suppressing alternator ripple spikes and jump-start transients on 12V input rail of adaptive LED driver ICs. IC Role / Device Role / Timing Role: Secondary-level TVS placed after bulk capacitor to handle residual high-frequency energy missed by LC filtering. Use Value: 600W PPK rating absorbs repetitive 100V/10ms pulses per ISO 7637-2 Pulse 1 without thermal runaway. | Use Scenario: Providing IEC 61000-4-2 Level 4 (±15kV air, ±8kV contact) ESD protection on USB-C CC and VBUS lines in portable docking stations. IC Role / Device Role / Timing Role: First-line transient absorber integrated into board-level protection scheme alongside common-mode chokes. Use Value: 18.2V VC ensures safe clamping below USB PD 20V tolerance limit while maintaining <1µA leakage for low-power suspend modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA | Same VWM/VBR/VC specs, but not AEC-Q101 qualified; higher IR limit (5µA vs. 1µA) | Limited to industrial/commercial use; unsuitable for automotive production | Select SMBJ11CAH for automotive OEM programs requiring AEC-Q101 evidence and ISO 7637-2 validation |
| SAC11CA | Same DO-214AA package, but lower PPK (400W); VBR tighter (12.5–13.3V); non-AEC-Q101 | Lower surge margin; insufficient for Pulse 1 load dump testing in BCM designs | Choose SMBJ11CAH where 600W headroom and certified automotive qualification are mandatory |
Compared with SMBJ11CA and SAC11CA, the SMBJ11CAH delivers verified AEC-Q101 reliability, 50% higher peak power handling, and guaranteed <1µA leakage - making it the only option qualified for safety-critical automotive front-end protection where failure modes must be excluded by specification.
Availability
SMBJ11CAH is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O protection, LED headlamp drivers, and USB-C port ESD protection requiring stable component supply across multi-year production cycles.
Supply support for SMBJ11CAH 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 was developed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments, emphasizing robustness, repeatable clamping performance, and seamless SMT integration.
FAQ
What does the 'CAH' suffix indicate in SMBJ11CAH?
The 'CAH' suffix in SMBJ11CAH denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and high-reliability construction (H). This distinguishes it from unidirectional 'H' variants and non-automotive 'A' versions. The SMBJ11CAH is explicitly rated for symmetrical transient suppression in both voltage polarities and validated per automotive stress test standards.
Is SMBJ11CAH compatible with lead-free reflow profiles?
Yes, SMBJ11CAH is fully compatible with standard IPC/JEDEC J-STD-020 lead-free reflow profiles. Its moisture sensitivity level (MSL) is rated at Level 1, meaning it can be stored indefinitely at ambient conditions without baking. The matte tin-plated leads meet solderability requirements per J-STD-002, supporting peak temperatures up to 260°C.
How does SMBJ11CAH perform under repeated transient stress?
SMBJ11CAH maintains stable VBR and VC parameters after repeated 10/1000µs surges up to its rated 600W PPK, provided thermal derating per Figure 2 is observed. Its glass-passivated junction and DO-214AA package enable >1000 surge cycles at 50% PPK without parametric shift - confirmed in AEC-Q101 HTRB and TC testing.
Can SMBJ11CAH replace SMBJ11A in an existing design?
No - SMBJ11CAH is bidirectional while SMBJ11A is unidirectional. Replacing SMBJ11A with SMBJ11CAH requires verifying that reverse-polarity transients are expected and that system grounding allows symmetrical clamping. The SMBJ11CAH's cathode band marking remains present but functionally inert in bidirectional operation.
What is the maximum allowable PCB trace length between SMBJ11CAH and protected IC?
To preserve sub-1ps response effectiveness, PCB trace inductance must be minimized: total loop inductance should remain below 10 nH. For SMBJ11CAH, this typically means keeping traces under 5 mm in length with direct placement adjacent to the connector or IC pin, using solid ground plane coupling and avoiding vias in the transient current path.
SMBJ11CAH 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:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 34A
- 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)
SMBJ11CAH FAQ
1.How can I place an order for SMBJ11CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11CAH 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 SMBJ11CAH reliable?
The price and inventory of SMBJ11CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ11CAH is usually 5 days.
3.What payment methods are accepted for SMBJ11CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11CAH?
SMBJ11CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11CAH 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 SMBJ11CAH?
For technical support, including SMBJ11CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11CAH requirements.
6.How does Aetrix verify that SMBJ11CAH is sourced from the original manufacturer or authorized distributors?
All SMBJ11CAH 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 SMBJ11CAH meets industry standards.
7.What is the process for return or replacement of SMBJ11CAH?
All SMBJ11CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11CAH, 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 SMBJ11CAH part is unused and in its original packaging.
Return procedure for SMBJ11CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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