My Inquiry
My Account
Taiwan Semiconductor Corporation 5.0SMDJ40A
- Part No.:
- 5.0SMDJ40A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5.0SMDJ40A.pdf
- Description:
- 5000W, 46.8V, 5%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,616
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
5.0SMDJ40A 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 delivers 5000W peak pulse power at 10/1000μs, clamps transients to 64.5V at 77.6A, and features a 40V working standoff voltage with <2μA leakage at rated VWM. It is used in AC/DC power supply input stages to protect downstream regulators and controllers.
For engineers reviewing the 5.0SMDJ40A datasheet, 5.0SMDJ40A pinout, 5.0SMDJ40A application, or 5.0SMDJ40A equivalent, key selection criteria include clamping voltage (VC = 64.5V), peak pulse current (IPP = 77.6A), thermal resistance (RθJA = 61°C/W), unidirectional polarity, and DO-214AB (SMC) package compatibility with automated SMT assembly.
Technical Context
The 5.0SMDJ40A employs a stacked-die construction to achieve high surge capability in a single DO-214AB package. Its photo-glass passivated junction ensures stable breakdown behavior and low leakage, while its <1.0ps response time enables effective suppression of fast-rising ESD and lightning-induced transients.
Rated for operation from –55°C to +175°C, it supports high-reliability industrial and automotive power systems. Thermal performance is characterized with a 16mm × 16mm copper pad PCB layout, yielding RθJA = 61°C/W and RθJC = 17°C/W - critical for thermal design in compact power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min / max | 44.4 V / 49.1 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPP | 64.5 V - Clamped voltage at 77.6 A peak pulse, limiting stress on protected ICs |
| PPPM | 5000 W - Peak pulse power handling at 10/1000 μs waveform, per industry standard |
| IIB @ VWM | <2 μA - Reverse leakage at 40 V ensures minimal standby power loss in always-on circuits |
| TJ max | +175 °C - Enables use in high-ambient environments such as enclosed power enclosures or under-hood automotive locations |
Pinout & Package
Package: DO-214AB (SMC) - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, and cathode band polarity marking. Weight: 0.300 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or low-side reference | Provides low VF (~5 V @ 100 A) path during surge conduction to shunt energy safely to ground |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., +48V rail) | Reverse-biased during normal operation; becomes low-impedance path when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 5000W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without derating in typical PCB layouts |
| Clamping voltage ≤64.5V | Ensures protected 48V-rated components (e.g., MOSFET gate drivers, DC-DC controllers) remain below absolute maximum ratings during surge events |
| Fast response <1.0 ps | Responds before most semiconductor junctions can be damaged by ESD or fast transients (e.g., relay bounce, inductive kick) |
| Moisture sensitivity level 1 | Eliminates need for baking prior to reflow, supporting direct placement in high-volume SMT lines without process interruption |
Applications
| AC/DC Power Input Protection | I/O Interface Protection |
|---|---|
Use Scenario: Protecting primary-side rectifier outputs and secondary-side DC bus rails in offline SMPS units. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bulk capacitor or post-rectifier node to clamp surge-induced overvoltage. Use Value: Limits voltage excursion to ≤64.5V during 5000W transients, preventing damage to bridge rectifiers, PFC controllers, and main DC-DC ICs. | Use Scenario: Safeguarding RS-485 transceivers, CAN nodes, and industrial digital I/O ports against cable discharge and induced surges. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; this unidirectional device used on grounded-signal lines (e.g., shielded twisted pair return) where polarity is fixed. Use Value: Sub-μA leakage preserves signal integrity on high-impedance lines; 64.5V clamping protects transceiver VCC pins referenced to local ground. |
| Telecom Power Feeds | Industrial Control Inputs |
Use Scenario: Overvoltage protection on -48V telecom power distribution boards feeding remote radio units or baseband processors. IC Role / Device Role / Timing Role: Anode tied to system ground, cathode to -48V rail - configured for negative-rail clamping relative to chassis ground. Use Value: Withstands repeated 10/1000μs surges up to 77.6A while maintaining <2μA leakage, ensuring long-term reliability in 24/7 infrastructure equipment. | Use Scenario: Protecting PLC analog input modules (e.g., 0–10V, 4–20mA) from field-wiring transients introduced via long sensor cables. IC Role / Device Role / Timing Role: Placed between input terminal and internal signal conditioner IC, referenced to module ground plane. Use Value: 64.5V clamping prevents latch-up or destruction of precision op-amps and ADC front-ends; DO-214AB footprint allows dense layout near connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A | Lower peak power rating (600W vs. 5000W); same DO-214AA package but smaller thermal mass | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy surges (e.g., IEC 61000-4-2 ESD only) | Select only if surge threat level is confirmed ≤600W and board space constraints prohibit DO-214AB |
| 5.0SMDJ43A | Higher VWM (43V) and VC (69.4V); identical package, power rating, and thermal specs | Better margin for 48V nominal systems with wide tolerance swings; slightly higher clamping may stress tighter-voltage-margin loads | Prefer when protecting 48V systems with >10% tolerance; verify downstream IC VMAX ≥ 69.4V |
Compared with SMBJ40A and 5.0SMDJ43A, the 5.0SMDJ40A offers optimal balance of 40V standoff, 64.5V clamping, and full 5000W surge capacity in DO-214AB - making it the default choice for industrial 48V power rail protection where both voltage margin and energy handling are critical.
Availability
5.0SMDJ40A is available at Aetrix Electronics and suitable for AC/DC power supplies, industrial control inputs, and telecom power feeds requiring stable component supply and long-term production continuity.
Supply support for 5.0SMDJ40A 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 Taiwanese manufacturer specializing in discrete semiconductors, including TVS diodes, rectifiers, and MOSFETs, with ISO/TS 16949 and AEC-Q101 qualified production lines.
The 5.0SMDJxxA series was developed specifically for high-power, surface-mount surge protection in industrial and telecom infrastructure, emphasizing ruggedness, automated assembly compatibility, and tight parametric consistency across voltage grades.
FAQ
What is the maximum clamping voltage of the 5.0SMDJ40A under specified test conditions?
The 5.0SMDJ40A has a maximum clamping voltage (VC) of 64.5 V when subjected to its rated peak pulse current of 77.6 A using the 10/1000 μs waveform. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during a surge event. The 5.0SMDJ40A maintains this clamping performance across its operational temperature range, with minor variation governed by its VBR temperature coefficient of 0.105 mV/°C.
Is the 5.0SMDJ40A suitable for bidirectional transient protection?
No, the 5.0SMDJ40A is a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical specifications - including breakdown voltage, clamping behavior, and leakage - apply only under reverse-bias conditions. For applications requiring symmetrical surge suppression (e.g., data lines with no defined polarity), a dedicated bidirectional part such as the 5.0SMDJ40CA must be selected instead of the 5.0SMDJ40A.
What is the recommended PCB layout for optimal thermal performance of the 5.0SMDJ40A?
For optimal thermal performance, the 5.0SMDJ40A should be mounted on a PCB with 16 mm × 16 mm copper pads per lead, as specified in the datasheet's thermal characterization. This layout achieves the published RθJA of 61°C/W. Reducing pad size or using thinner copper will increase junction temperature under sustained surge duty cycles and may compromise long-term reliability. The 5.0SMDJ40A's DO-214AB package requires precise stencil aperture design to ensure consistent solder joint formation and mechanical stability.
Does the 5.0SMDJ40A meet RoHS and halogen-free compliance standards?
Yes, the 5.0SMDJ40A is RoHS compliant and halogen-free in accordance with IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and its matte tin-plated leads are solderable per J-STD-002. These compliance attributes are verified per Taiwan Semiconductor's D2102 revision documentation and are maintained across all production lots of the 5.0SMDJ40A.
How does the 5.0SMDJ40A compare to the 5.0SMDJ36A in terms of voltage rating and clamping performance?
The 5.0SMDJ40A has a higher working standoff voltage (40 V vs. 36 V) and breakdown voltage range (44.4–49.1 V vs. 40.0–44.2 V) than the 5.0SMDJ36A. Its clamping voltage is 64.5 V at 77.6 A, compared to 58.1 V at 86.1 A for the 5.0SMDJ36A. While the 5.0SMDJ36A handles slightly higher peak current, the 5.0SMDJ40A provides better voltage margin for 48V systems and maintains equivalent 5000W surge capability - making it more appropriate where VWM alignment with nominal rail voltage is critical.
5.0SMDJ40A 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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 77.6A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
5.0SMDJ40A FAQ
1.How can I place an order for 5.0SMDJ40A through Aetrix?
Please submit a Request for Quotation (RFQ) for 5.0SMDJ40A 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 5.0SMDJ40A reliable?
The price and inventory of 5.0SMDJ40A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5.0SMDJ40A is usually 5 days.
3.What payment methods are accepted for 5.0SMDJ40A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5.0SMDJ40A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5.0SMDJ40A?
5.0SMDJ40A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5.0SMDJ40A 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 5.0SMDJ40A?
For technical support, including 5.0SMDJ40A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5.0SMDJ40A requirements.
6.How does Aetrix verify that 5.0SMDJ40A is sourced from the original manufacturer or authorized distributors?
All 5.0SMDJ40A 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 5.0SMDJ40A meets industry standards.
7.What is the process for return or replacement of 5.0SMDJ40A?
All 5.0SMDJ40A units undergo pre-shipment inspection (PSI). If there is an issue with 5.0SMDJ40A, 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 5.0SMDJ40A part is unused and in its original packaging.
Return procedure for 5.0SMDJ40A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5.0SMDJ40A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
