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Taiwan Semiconductor Corporation SMDJ11CAH
- Part No.:
- SMDJ11CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ11CAH.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,492
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Product details
Overview
SMDJ11CAH from Taiwan Semiconductor is a bidirectional 3000W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with a working stand-off voltage of 11 V, breakdown voltage range 12.2–13.5 V at 1 mA, and clamping voltage of 18.2 V at 164.8 A peak pulse current. It is AEC-Q101 qualified and designed for ESD and surge protection in automotive power line interfaces.
For engineers reviewing the SMDJ11CAH datasheet, SMDJ11CAH pinout, SMDJ11CAH application, or SMDJ11CAH equivalent, key selection criteria include bidirectional clamping performance, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, 1.0 ps response time, TJ = –55°C to +175°C operating range, and DO-214AB mechanical compatibility with automated SMT placement.
Technical Context
The SMDJ11CAH is a glass-passivated, single-die, bidirectional TVS diode optimized for high-energy transient suppression in automotive and industrial DC power rails. Its design targets fast clamping (<1.0 ps response), low leakage (<1 µA at VWM), and robust thermal performance (RθJA = 75°C/W).
It operates symmetrically in both polarities, with identical electrical specs in forward and reverse directions. The device meets JESD201 Class 2 whisker resistance, J-STD-020 Level 1 moisture sensitivity, and UL 94V-0 flammability requirements - confirming suitability for reflow-soldered automotive PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1 mA | 12.2–13.5 V - Voltage at which device enters avalanche breakdown; defines minimum clamping threshold |
| VC @ IPPM=164.8 A | 18.2 V - Clamped voltage during 10/1000 µs surge; ensures downstream ICs see <18.2 V under worst-case transients |
| PPK | 3000 W - Peak pulse power handling per 1 ms pulse; supports ISO 7637-2 Pulse 5a (load dump) |
| IPPM | 164.8 A - Maximum non-repetitive peak current; determines minimum trace width and fuse coordination |
| TJ Range | –55°C to +175°C - Full automotive temperature range support without derating loss |
| Response Time | <1.0 ps - Sub-nanosecond turn-on enables protection of high-speed CAN/LIN transceivers |
Pinout & Package
DO-214AB (SMC) surface-mount package: cathode band not marked (bidirectional); matte tin-plated leads; 0.290 g typical weight; UL 94V-0 molding compound; polarity symmetry eliminates orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | No polarity marking required; connects across protected line and ground (or between differential lines) without directional constraints |
| Case (body) | Thermal and mechanical interface | DO-214AB outline provides 15°C/W junction-to-lead thermal resistance; compatible with standard SMC footprint and reflow profiles |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood and powertrain applications per stress test requirements |
| ISO 7637-2 compliance | Passes Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery interruption), and Pulse 3a/3b (switching noise) waveforms |
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| Level 1 moisture sensitivity | Zero bake requirement prior to reflow; supports standard J-STD-020 handling and storage |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Line Protection | Industrial DC Input Protection |
|---|---|
Use Scenario: 12 V battery rail in engine control units exposed to load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between battery input and DC-DC converter input stage. Use Value: Limits transients to ≤18.2 V during 3000 W pulses, preventing overvoltage damage to buck controller ICs and gate drivers. | Use Scenario: 24 V DC input of programmable logic controllers subjected to inductive switching noise. IC Role / Device Role / Timing Role: Primary surge shunt on main power entry, upstream of EMI filter and bulk capacitor. Use Value: Absorbs 164.8 A peak currents from relay coil flyback, maintaining system uptime without latch-up or reset. |
| Telecom Interface Protection | Consumer Equipment AC/DC Adapter Input |
Use Scenario: RS-485 bus power pins in outdoor base stations subject to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level protection aligned with common-mode choke and primary MOV. Use Value: Provides sub-20 V clamping with <1 ps response, preserving signal integrity of half-duplex transceivers during fast-rising transients. | Use Scenario: Input stage of USB-C PD adapters where ESD and surge immunity impact safety certification. IC Role / Device Role / Timing Role: Final-stage TVS after bridge rectifier and before primary-side controller. Use Value: Meets IEC 61000-4-2 (±15 kV air/±8 kV contact) and IEC 61000-4-5 (Line-Ground 2 kV) with no secondary crowbar needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC11CA | Lower PPK = 1500 W; VC = 19.5 V @ 77 A; same DO-214AB package | Not rated for ISO 7637-2 Pulse 5a (load dump); suitable only for lower-energy transients | Select when cost sensitivity outweighs full automotive surge margin and peak current exceeds 100 A is unlikely |
| SMLJ11CA | Same 3000 W rating but SOD-123FL package; VC = 18.2 V @ 164.8 A; RθJA = 100°C/W | Higher thermal resistance limits sustained surge duty cycle; unsuitable for repeated load dump events | Choose only for space-constrained layouts where DO-214AB footprint is unavailable and thermal mass is supplemented externally |
Compared with SAC11CA and SMLJ11CA, the SMDJ11CAH delivers superior thermal robustness (RθJA = 75°C/W), full ISO 7637-2 coverage including Pulse 5a, and AEC-Q101 validation - making it the preferred choice for automotive power rail protection where reliability under repeated high-energy stress is mandatory.
Availability
SMDJ11CAH is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom infrastructure requiring stable component supply, long-lifecycle availability, and AEC-Q101-compliant surge protection.
Supply support for SMDJ11CAH 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 SMDJ series was developed specifically for high-reliability automotive power line protection, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in surface-mount packages.
FAQ
What does the "CAH" suffix indicate in SMDJ11CAH?
The "CAH" suffix denotes a bidirectional configuration - meaning the SMDJ11CAH provides symmetrical clamping in both polarities, unlike unidirectional "AH" variants. This eliminates polarity marking and simplifies layout for differential or floating rail protection. The SMDJ11CAH achieves identical VBR, VC, and IPPM specs in either direction, confirmed in the Electrical Specifications table on page 2 of the Taiwan Semiconductor datasheet.
Is SMDJ11CAH compliant with automotive standards beyond AEC-Q101?
Yes, the SMDJ11CAH meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements for transient immunity on 12 V and 24 V vehicle networks. It is also qualified to JESD201 Class 2 for tin whisker resistance and J-STD-020 Level 1 for moisture sensitivity - all critical for automotive under-hood and powertrain applications where the SMDJ11CAH is deployed.
What is the maximum clamping voltage of SMDJ11CAH under surge conditions?
The SMDJ11CAH has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current of 164.8 A (10/1000 µs waveform). This value is measured per standard test conditions and guarantees that protected circuitry downstream will not experience more than 18.2 V during worst-case transients - a key parameter verified in the Electrical Specifications table for SMDJ11CAH.
Can SMDJ11CAH replace SMDJ11AH in an existing design?
No - SMDJ11CAH is bidirectional while SMDJ11AH is unidirectional, so direct substitution requires layout review. The SMDJ11AH has a cathode band marking and conducts only in reverse bias; replacing it with SMDJ11CAH removes polarity dependency but may alter leakage behavior in DC-biased circuits. Verify system-level clamping symmetry and steady-state leakage (<1 µA at 11 V) before redesigning with SMDJ11CAH.
What thermal derating applies to SMDJ11CAH above 25°C ambient?
The SMDJ11CAH's peak pulse power (3000 W) is specified at TA = 25°C and must be linearly derated above that temperature per Figure 2 in the datasheet. At 125°C ambient, the allowable PPK drops to approximately 1500 W. This derating is critical for engine bay applications - the SMDJ11CAH's RθJA = 75°C/W and TJMAX = 175°C define its safe operating area under sustained thermal stress.
SMDJ11CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMDJ
- 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):
- 164.8A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ11CAH FAQ
1.How can I place an order for SMDJ11CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ11CAH 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 SMDJ11CAH reliable?
The price and inventory of SMDJ11CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ11CAH is usually 5 days.
3.What payment methods are accepted for SMDJ11CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ11CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ11CAH?
SMDJ11CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ11CAH 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 SMDJ11CAH?
For technical support, including SMDJ11CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ11CAH requirements.
6.How does Aetrix verify that SMDJ11CAH is sourced from the original manufacturer or authorized distributors?
All SMDJ11CAH 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 SMDJ11CAH meets industry standards.
7.What is the process for return or replacement of SMDJ11CAH?
All SMDJ11CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ11CAH, 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 SMDJ11CAH part is unused and in its original packaging.
Return procedure for SMDJ11CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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