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Taiwan Semiconductor Corporation 5.0SMDJ18AH
- Part No.:
- 5.0SMDJ18AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5.0SMDJ18AH.pdf
- Description:
- 5000W, 21.1V, 5%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,831
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Product details
Overview
5.0SMDJ18AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and I/O interfaces. It features a 18 V working standoff voltage, 20.0–22.1 V breakdown voltage at 1 mA, 172 V maximum clamping voltage at 10 A peak pulse current, and 5000 W peak pulse power capability per 10/1000 µs waveform.
For engineers reviewing the 5.0SMDJ18AH datasheet, 5.0SMDJ18AH pinout, 5.0SMDJ18AH application, or 5.0SMDJ18AH equivalent, key selection criteria include clamping performance under 10 A surge, thermal resistance (RθJL = 16 °C/W), AEC-Q101 qualification, DO-214AB package compatibility, and low leakage (<10 µA at 18 V).
Technical Context
The 5.0SMDJ18AH employs a glass-passivated, stacked-die construction optimized for fast transient response (<1.0 ps) and stable clamping across temperature. Its unidirectional configuration provides reverse-biased surge suppression with defined cathode polarity indicated by a band.
Rated for junction temperatures from –55 °C to +175 °C and moisture sensitivity level 1 (per J-STD-020), it supports automated SMT placement on PCBs with 16 mm × 16 mm copper pads and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR @ IT=1 mA | 20.0–22.1 V - Verified breakdown threshold ensuring reliable turn-on during transients |
| VC @ IPP=10 A | 172 V - Clamped voltage limiting downstream circuit stress during 10 A surge |
| PPPSM | 5000 W - Peak pulse power handling per 10/1000 µs waveform, critical for automotive load-dump immunity |
| IIB @ VWM | <10 µA - Low leakage preserves efficiency in always-on 18 V supply rails |
| RθJL | 16 °C/W - Enables direct thermal coupling to PCB copper for sustained 6.25 W steady-state dissipation at TL = 75 °C |
| αVBR | 0.098 mV/°C - Predictable breakdown voltage drift over temperature for robust design margining |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode indicated by molded band. Matte tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-impedance return during surge | Connected to system ground or low-side reference; carries full IPP during clamping |
| Cathode | Protected line connection / high-impedance input during normal operation | Connected to 18 V rail or signal line; blocks reverse current until VBR exceeded |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood and powertrain applications per stress test requirements |
| Photo glass passivated junction | Enhances long-term reliability and humidity resistance vs. epoxy-passivated alternatives |
| Fast response time <1.0 ps | Clamps ESD and lightning-induced transients before sensitive ICs experience overstress |
| Stacked die construction | Enables 5000 W pulse rating in DO-214AB footprint without derating for parallel devices |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally restricted markets |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against ISO 7637-2 load dump and jump-start surges. IC Role / Device Role / Timing Role: Primary unidirectional TVS clamp placed between battery rail and DC-DC input stage. Use Value: Limits clamped voltage to 172 V at 10 A, enabling use of 200 V-rated MOSFETs and reducing need for upstream filtering. | Use Scenario: Safeguarding 24 V digital input modules in factory automation against field-wiring induced transients. IC Role / Device Role / Timing Role: Front-end surge limiter on isolated input channels prior to optocoupler or Schmitt trigger. Use Value: Sub-10 µA leakage avoids false triggering in high-impedance sensing circuits while maintaining fast <1.0 ps response. |
| Telecom DC Power Feeds | Medical Equipment Auxiliary Supplies |
Use Scenario: Surge protection on -48 V telecom rectifier outputs feeding base station backplanes. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to negative rail, suppressing positive-going transients only. Use Value: 18 V VWM allows safe operation across -48 V ±10% tolerance; 175 °C TJMAX supports sealed enclosure thermal profiles. | Use Scenario: Secondary-side overvoltage protection on isolated 18 V auxiliary supplies powering analog front-ends. IC Role / Device Role / Timing Role: Final-stage TVS on regulated output, guarding against regulator failure or feedback loop loss. Use Value: AEC-Q101 qualification and halogen-free construction support compliance with IEC 60601-1 safety and environmental requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Lower peak power (600 W), same DO-214AA package, higher RθJA (85 °C/W) | Not AEC-Q101 qualified; suitable for commercial-grade I/O but not automotive power rails | Select when cost-sensitive non-automotive designs require basic 18 V clamping with lower surge energy |
| 5.0SMDJ18A | Same electrical specs but lacks AEC-Q101 qualification and halogen-free certification | Approved for industrial use only; excluded from automotive OEM BOMs requiring AEC-Q101 | Choose only if AEC-Q101 and halogen-free compliance are not required and legacy qualification suffices |
Compared with SMBJ18A and 5.0SMDJ18A, the 5.0SMDJ18AH delivers automotive-grade reliability, 8.3× higher peak power, and tighter thermal management-justifying its use where load-dump immunity and long-term field stability are mandatory.
Availability
5.0SMDJ18AH is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, telecom DC power feeds, and medical equipment auxiliary supplies requiring stable component supply and AEC-Q101-compliant surge immunity.
Supply support for 5.0SMDJ18AH 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 communications markets since 1979.
The 5.0SMDJxxAH series belongs to TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for high-reliability DC power line protection in harsh environments where surge immunity, thermal robustness, and long-term parametric stability are critical.
FAQ
What is the maximum clamping voltage of the 5.0SMDJ18AH at its rated peak pulse current?
The 5.0SMDJ18AH has a maximum clamping voltage (VC) of 172 V at 10 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during a full-rated surge event. The 5.0SMDJ18AH maintains this clamping performance across its specified junction temperature range of –55 °C to +175 °C.
Is the 5.0SMDJ18AH suitable for automotive applications?
Yes, the 5.0SMDJ18AH is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units, body electronics, and infotainment power supplies. Its 175 °C maximum junction temperature, glass-passivated junction, and moisture sensitivity level 1 rating meet stringent automotive reliability requirements. The 5.0SMDJ18AH also complies with halogen-free and RoHS directives required by major Tier 1 suppliers.
What package type does the 5.0SMDJ18AH use, and what are its mounting requirements?
The 5.0SMDJ18AH uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads. For optimal thermal performance and power derating, it must be mounted on a PCB with a minimum 16 mm × 16 mm copper pad per lead. The device is compatible with standard reflow profiles and meets J-STD-002 solderability and JESD201 Class 2 whisker resistance specifications.
How does the 5.0SMDJ18AH differ from the non-H suffix variant 5.0SMDJ18A?
The 5.0SMDJ18AH adds AEC-Q101 qualification, halogen-free construction per IEC 61249-2-21, and enhanced process controls versus the 5.0SMDJ18A. Electrically identical, the "H" suffix denotes automotive-grade reliability and environmental compliance. The 5.0SMDJ18AH is approved for OEM automotive BOMs; the 5.0SMDJ18A is limited to industrial/commercial applications where those certifications are not mandated.
What is the leakage current specification for the 5.0SMDJ18AH at its working voltage?
The 5.0SMDJ18AH exhibits a maximum blocking leakage current (IIB) of 10 µA at its 18 V working standoff voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal power loss in always-on 18 V systems and prevents false triggering in high-impedance sensing nodes. Leakage remains below 50 µA across the full operating temperature range per datasheet characterization.
5.0SMDJ18AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 5.0SMDJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 172A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
5.0SMDJ18AH FAQ
1.How can I place an order for 5.0SMDJ18AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 5.0SMDJ18AH 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 5.0SMDJ18AH reliable?
The price and inventory of 5.0SMDJ18AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5.0SMDJ18AH is usually 5 days.
3.What payment methods are accepted for 5.0SMDJ18AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5.0SMDJ18AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5.0SMDJ18AH?
5.0SMDJ18AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5.0SMDJ18AH 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 5.0SMDJ18AH?
For technical support, including 5.0SMDJ18AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5.0SMDJ18AH requirements.
6.How does Aetrix verify that 5.0SMDJ18AH is sourced from the original manufacturer or authorized distributors?
All 5.0SMDJ18AH 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 5.0SMDJ18AH meets industry standards.
7.What is the process for return or replacement of 5.0SMDJ18AH?
All 5.0SMDJ18AH units undergo pre-shipment inspection (PSI). If there is an issue with 5.0SMDJ18AH, 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 5.0SMDJ18AH part is unused and in its original packaging.
Return procedure for 5.0SMDJ18AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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