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Taiwan Semiconductor Corporation SMDJ11AH
- Part No.:
- SMDJ11AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ11AH.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,724
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Product details
Overview
SMDJ11AH from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode with a 11.1V minimum breakdown voltage (VBR), 11V working stand-off voltage (VWM), and 18.2V maximum clamping voltage (VC) at 164.8A peak pulse current - designed for ESD and surge protection in automotive power lines and industrial DC inputs.
For engineers reviewing the SMDJ11AH datasheet, SMDJ11AH pinout, SMDJ11AH application, or SMDJ11AH equivalent, key selection criteria include its AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, DO-214AB (SMC) package, 1.0ps typical response time, and 175°C maximum junction temperature.
Technical Context
The SMDJ11AH operates as a unidirectional avalanche diode, clamping transients above VWM = 11V by entering avalanche breakdown at VBR ≥ 11.1V (tested at 1mA). Its glass-passivated junction ensures stable leakage (<1µA at VWM) and robust ESD immunity.
Thermally, it features RθJA = 75°C/W and RθJL = 15°C/W, enabling reliable 3000W peak pulse dissipation (1ms, 10/1000µs waveform) with derating above 25°C ambient per Fig.2 - critical for under-hood automotive modules and industrial PLC I/O protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1mA | 11.1–13.5 V - Ensures precise turn-on threshold for predictable overvoltage response |
| VC @ IPPM=164.8A | 18.2 V - Limits downstream voltage stress during 3000W transient events |
| PPK | 3000 W - Supports high-energy load-dump and lightning-induced surges per ISO 7637-2 |
| TJ max | +175 °C - Enables operation in engine compartment and industrial control enclosures |
| Response time | <1.0 ps - Fast enough to protect sensitive CAN/LIN transceivers and microcontrollers |
| Package | DO-214AB (SMC) - Standardized surface-mount footprint compatible with automated placement |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band; weight ≈ 0.290g; UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path for unidirectional clamping |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12V battery rail); marked with band |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA at VWM) across lifetime |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow - simplifies SMT manufacturing |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green electronics |
Applications
| Automotive Power Line Protection | Industrial DC Input Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs, body controllers, and lighting modules from load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and system input filter to clamp transients before LDOs or DC-DC converters. Use Value: Clamps 3000W pulses to ≤18.2V, preventing damage to 24V-tolerant regulators and MCU I/O pins. | Use Scenario: Safeguarding programmable logic controller (PLC) digital input cards exposed to field wiring transients. IC Role / Device Role / Timing Role: Front-end surge suppression on 24V DC input terminals, upstream of optocouplers and signal conditioning. Use Value: Withstands repetitive ISO 7637-2 Pulse 1 (−150V, 40ms) without degradation due to glass passivation and 175°C TJ. |
| Telecom Power Interface | Consumer Equipment DC Adapter Input |
Use Scenario: Shielding PoE-powered switches and base station backhaul interfaces from induced lightning surges. IC Role / Device Role / Timing Role: Secondary-level protection after gas discharge tube (GDT), absorbing residual energy in <1ps. Use Value: 18.2V clamping enables compatibility with 12V/24V telecom rails while meeting IEC 61000-4-5 Level 4 requirements. | Use Scenario: Hardening USB-C PD adapters and smart home hubs against AC/DC adapter fault transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on secondary-side 5–20V output rails to prevent overvoltage propagation to connected devices. Use Value: 11V VWM allows safe operation across full USB PD profile range; 1.0ps response prevents latch-up in USB interface 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 |
|---|---|---|---|
| SAC11AH (Littelfuse) | Same DO-214AB package, identical VWM/VBR/VC specs, but not AEC-Q101 qualified | Lacks automotive qualification; suitable only for industrial/commercial use | Select when AEC-Q101 is not required and cost is prioritized |
| SMAJ11A (ON Semiconductor) | Lower PPK = 400W, smaller SMA package, higher VC = 19.0V at lower IPPM | Insufficient for ISO 7637-2 Pulse 1; limited to low-energy ESD-only scenarios | Choose only for space-constrained non-automotive designs with sub-500W surge requirements |
Compared with SAC11AH and SMAJ11A, the SMDJ11AH delivers certified automotive robustness and 3000W surge handling in the same SMC footprint - making it the sole option for AEC-Q101-compliant 12V system protection where energy absorption is critical.
Availability
SMDJ11AH is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom power interface hardening requiring stable component supply and long-term lifecycle support.
Supply support for SMDJ11AH 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 transient suppression in harsh environments - emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and thermal resilience up to +175°C junction temperature.
FAQ
What is the maximum clamping voltage of the SMDJ11AH under a 3000W transient event?
The SMDJ11AH has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current of 164.8 A - corresponding to a 3000W transient per the 10/1000µs waveform. This value is measured at TA = 25°C and guarantees that downstream circuitry sees no more than 18.2 V during such an event, protecting 24V-tolerant ICs and regulators. The SMDJ11AH maintains this performance across its specified junction temperature range.
Is the SMDJ11AH suitable for bidirectional surge protection?
No, the SMDJ11AH is unidirectional and intended for DC line protection with defined polarity. For bidirectional applications, the SMDJ11CAH variant must be used - it shares the same voltage ratings but supports symmetrical clamping in both directions. The SMDJ11AH's cathode band marking and forward voltage specification (3.5 V @ 100 A) confirm its unidirectional design; using it in AC or bipolar configurations risks failure.
Does the SMDJ11AH meet automotive qualification standards?
Yes, the SMDJ11AH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its glass-passivated junction, MSL Level 1 rating, and 175°C maximum junction temperature are all validated per automotive stress test protocols. This makes the SMDJ11AH appropriate for under-hood and chassis-mounted modules where environmental ruggedness is mandatory.
What is the thermal resistance from junction to ambient for the SMDJ11AH?
The SMDJ11AH has a typical junction-to-ambient thermal resistance (RθJA) of 75°C/W when mounted on a standard JEDEC 2-layer PCB with 1 in² copper pad. This value assumes no additional heatsinking and defines the baseline temperature rise under steady-state power dissipation. For pulsed operation, thermal mass dominates - allowing 3000W peaks despite the relatively high RθJA, as confirmed by the pulse derating curve in the official datasheet for SMDJ11AH.
Can the SMDJ11AH be used in place of the SMAJ11A in an existing design?
No - the SMDJ11AH is not a drop-in replacement for the SMAJ11A due to significant differences in package (DO-214AB/SMC vs. DO-214AC/SMA), power rating (3000W vs. 400W), and clamping behavior. While both share the "11A" designation, the SMDJ11AH requires larger PCB pads and thermal relief. Substituting it without layout review risks solder joint stress and inadequate surge margin. Always verify mechanical fit and thermal design before replacing SMAJ11A with SMDJ11AH.
SMDJ11AH 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMDJ11AH FAQ
1.How can I place an order for SMDJ11AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ11AH 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 SMDJ11AH reliable?
The price and inventory of SMDJ11AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ11AH is usually 5 days.
3.What payment methods are accepted for SMDJ11AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ11AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ11AH?
SMDJ11AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ11AH 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 SMDJ11AH?
For technical support, including SMDJ11AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ11AH requirements.
6.How does Aetrix verify that SMDJ11AH is sourced from the original manufacturer or authorized distributors?
All SMDJ11AH 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 SMDJ11AH meets industry standards.
7.What is the process for return or replacement of SMDJ11AH?
All SMDJ11AH units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ11AH, 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 SMDJ11AH part is unused and in its original packaging.
Return procedure for SMDJ11AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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