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Taiwan Semiconductor Corporation SMDJ15AH
- Part No.:
- SMDJ15AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ15AH.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,655
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Product details
Overview
SMDJ15AH from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode with a 15V working stand-off voltage, 16.7–18.5V breakdown voltage at 1mA test current, and 24.4V maximum clamping voltage at 123A peak pulse current. It is AEC-Q101 qualified and designed for ESD and surge protection in automotive power electronics and industrial control interfaces.
For engineers reviewing the SMDJ15AH datasheet, SMDJ15AH pinout, SMDJ15AH application, or SMDJ15AH equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature limits up to +175°C, DO-214AB (SMC) package compatibility, and unidirectional polarity marking.
Technical Context
The SMDJ15AH operates as a unidirectional avalanche diode with glass-passivated junction, delivering sub-1ps response time and clamping transients within defined ISO 7637-2 waveforms. Its 3000W peak pulse power rating applies at 1ms pulse width and derates linearly above 25°C ambient per Fig.2.
Thermal design relies on RθJA = 75°C/W and RθJL = 15°C/W, enabling effective heat dissipation in high-density PCB layouts. The device supports automated placement and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1mA | 16.7–18.5 V - Confirmed breakdown threshold ensuring reliable turn-on during transients |
| VC @ IPPM=123A | 24.4 V - Clamping voltage limiting downstream circuit stress during worst-case 3000W surge |
| PPK | 3000 W - Peak pulse power handling capability per 1ms non-repetitive waveform (Fig.5) |
| TJ max | +175 °C - Maximum junction temperature supporting operation in under-hood automotive environments |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance defining PCB copper area and airflow requirements |
| IPPM | 123 A - Peak impulse current corresponding to full 3000W clamping at VC |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Weight: 0.290g. Meets UL 94V-0 flammability rating and J-STD-002 solderability standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to protected line side; conducts during forward surge (e.g., load dump reversal) |
| Cathode | Reverse-biased clamping terminal | Connected to ground or low-impedance return; initiates avalanche clamping when VAK exceeds VBR |
| Cathode band | Polarity indicator | Visible marking on package body confirming unidirectional orientation for correct PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive powertrain and chassis applications per stress test requirements |
| Glass passivated junction | Enhanced long-term stability and leakage control under thermal cycling and humidity exposure |
| ISO 7637-2 compliance | Guaranteed suppression of Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (capacitive coupling) |
| Sub-1ps response time | Enables protection of fast-edge digital interfaces and high-speed analog sensors against ESD events |
| J-STD-020 Level 1 MSL | Zero bake requirement prior to reflow; supports standard SMT assembly without moisture-related popcorning |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges exceeding 15V. Use Value: Limits voltage to ≤24.4V during 3000W pulses, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Shielding 24V digital input modules from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact inputs subjected to inductive kickback and lightning-induced coupling. Use Value: Maintains signal integrity by clamping transients within 1ps while sustaining 175°C junction temperature in enclosed cabinets. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drivers |
Use Scenario: Safeguarding PoE-powered equipment front-end regulators from Ethernet cable surges. IC Role / Device Role / Timing Role: Secondary-level TVS on 48V DC input rails after primary surge arrestors. Use Value: Provides precise 15V stand-off and 24.4V clamping to avoid regulator dropout while meeting IEC 61000-4-5 Level 4 immunity. | Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances. IC Role / Device Role / Timing Role: Flyback energy clamp across motor terminals during PWM commutation. Use Value: Handles repetitive 123A peak currents without degradation, validated per AEC-Q101 temperature cycling and HTRB tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC15 | Lower PPK = 1500W; VC = 24.4V same, but IPPM = 61.5A only | Not suitable for ISO 7637-2 Pulse 1 (3000W); limited to lower-energy transients | Select SMDJ15AH where full 3000W surge immunity is required per automotive OEM specs. |
| SMLJ15A | Same DO-214AB package and VWM/VBR/VC, but PPK = 3000W rated at TA = 25°C only; no AEC-Q101 qualification | Lacks automotive qualification; not approved for safety-critical vehicle subsystems | Choose SMDJ15AH for AEC-Q101-compliant designs; SMLJ15A acceptable for industrial non-automotive use. |
Compared with SAC15 and SMLJ15A, the SMDJ15AH uniquely combines 3000W peak power, AEC-Q101 qualification, and ISO 7637-2 compliance in a single DO-214AB package-enabling drop-in deployment in automotive power modules without redesigning surge protection architecture.
Availability
SMDJ15AH is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, telecom DC power feeds, and consumer appliance motor drivers requiring stable component supply and long-term lifecycle support.
Supply support for SMDJ15AH 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 for automotive, industrial, and computing markets.
The SMDJ series was developed specifically for high-reliability transient suppression in harsh-environment applications, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in surface-mount packages.
FAQ
What is the maximum clamping voltage of the SMDJ15AH under full-rated surge conditions?
The SMDJ15AH exhibits a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 123 A, measured per the 10/1000 µs waveform defined in IEC 61000-4-5. This value is guaranteed across the full operating temperature range and ensures downstream components remain within safe voltage margins during 3000W transient events.
Is the SMDJ15AH suitable for bidirectional surge protection applications?
No, the SMDJ15AH is unidirectional. For bidirectional protection, the SMDJ15CAH variant must be used-its marking code is DEM and it provides symmetrical clamping in both polarities. The SMDJ15AH's cathode band marking and electrical specifications apply only to reverse-biased operation; forward conduction follows standard diode behavior with VF ≈ 3.5 V at 100 A.
Does the SMDJ15AH require special handling during PCB assembly?
No special handling is required: the SMDJ15AH is rated J-STD-020 Level 1 for moisture sensitivity and may be placed directly into standard reflow profiles without baking. Its matte tin-plated leads comply with J-STD-002 for solderability, and the DO-214AB package supports automated pick-and-place with standard nozzle tooling.
How does the SMDJ15AH perform under elevated ambient temperatures?
The SMDJ15AH's peak pulse power rating derates linearly above 25°C ambient per Figure 2 in the datasheet, maintaining 3000W capability only at TA ≤ 25°C. At 100°C ambient, its PPK drops to approximately 1500W. Designers must verify clamping performance using RθJA = 75°C/W and ensure adequate copper area and airflow to limit TJ ≤ 175°C.
What international standards does the SMDJ15AH meet for automotive applications?
The SMDJ15AH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 for automotive transient immunity, covering Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery connection/disconnection), and Pulse 3a/3b (capacitive coupling). It also complies with RoHS Directive 2011/65/EU and IEC 61249-2-21 for halogen-free construction.
SMDJ15AH 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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 123A
- 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)
SMDJ15AH FAQ
1.How can I place an order for SMDJ15AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ15AH 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 SMDJ15AH reliable?
The price and inventory of SMDJ15AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ15AH is usually 5 days.
3.What payment methods are accepted for SMDJ15AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ15AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ15AH?
SMDJ15AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ15AH 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 SMDJ15AH?
For technical support, including SMDJ15AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ15AH requirements.
6.How does Aetrix verify that SMDJ15AH is sourced from the original manufacturer or authorized distributors?
All SMDJ15AH 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 SMDJ15AH meets industry standards.
7.What is the process for return or replacement of SMDJ15AH?
All SMDJ15AH units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ15AH, 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 SMDJ15AH part is unused and in its original packaging.
Return procedure for SMDJ15AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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