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Taiwan Semiconductor Corporation 5.0SMDJ78AHM6G
- Part No.:
- 5.0SMDJ78AHM6G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5.0SMDJ78AHM6G.pdf
- Description:
- TVS DIODE 78VWM 126VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,422
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Product details
Overview
5.0SMDJ78AHM6G from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 5000W peak pulse power at 10/1000μs, with 78V working standoff voltage, 86.7–95.8V breakdown voltage at 1mA, and 126V maximum clamping voltage at 39.7A peak current. It is AEC-Q101 qualified and used for surge protection in automotive I/O interfaces and AC/DC power supplies.
For engineers reviewing the 5.0SMDJ78AHM6G datasheet, 5.0SMDJ78AHM6G pinout, 5.0SMDJ78AHM6G application, or 5.0SMDJ78AHM6G equivalent, key selection criteria include clamping performance under 10/1000μs transients, unidirectional polarity configuration, thermal resistance (RθJL = 16°C/W), moisture sensitivity level (MSL 1), and compliance with RoHS and halogen-free standards per IEC 61249-2-21.
Technical Context
This TVS diode employs a stacked-die construction to achieve high peak pulse power handling while maintaining low clamping ratio (VC/VBR ≈ 1.31). Its photo-glass passivated junction ensures stable leakage performance and fast response time (<1.0ps), critical for protecting sensitive downstream circuitry from ESD and lightning-induced surges.
The device operates across –55°C to +175°C junction temperature range and is characterized with 1mA test current for VBR, 2µA blocking leakage at VWM, and thermal derating per Fig.2 - enabling reliable use in under-hood automotive environments and industrial power converters where ambient temperatures exceed 85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 78 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR @ IT=1mA | 86.7–95.8 V - Measured breakdown voltage range; determines minimum trigger point for transient suppression. |
| VC @ IPP=39.7A | 126 V - Clamped voltage during 10/1000μs surge; limits stress on protected ICs or MOSFETs. |
| PPPPM | 5000 W - Peak pulse power rating; supports high-energy transients such as ISO 7637-2 Pulse 5a without failure. |
| RθJL | 16 °C/W - Junction-to-lead thermal resistance; enables effective heat transfer to PCB copper pad for sustained surge duty cycles. |
| MSL Level | Level 1 per J-STD-020 - No floor life limitation; suitable for standard SMT reflow without dry-pack or baking requirements. |
Pinout & Package
Package: DO-214AB (SMC) - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, and cathode band indicating polarity. Weight: ~0.300g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side of protected line; forms unidirectional clamp path to ground. |
| Cathode | Current exit terminal in forward bias; marked by band | Connected to higher-potential side (e.g., supply rail or signal line); defines directionality of surge shunting. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Clamping ratio (VC/VBR) | ~1.31 - Low ratio ensures minimal overvoltage exposure to protected circuitry during surge events. |
| Response time | <1.0 ps - Enables suppression of ultrafast transients before sensitive components experience overstress. |
| Stacked die architecture | Enables 5000W pulse power in compact DO-214AB footprint without compromising voltage uniformity or thermal stability. |
Applications
| Automotive Body Control Module (BCM) I/O Protection | Industrial AC/DC Power Supply Input Stage |
|---|---|
Use Scenario: Protects LIN bus transceivers and GPIO lines in BCM against load dump and jump-start surges per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients above 78V. Use Value: Limits clamped voltage to 126V during 39.7A surge, preventing damage to 3.3V/5V logic-level interface ICs. | Use Scenario: Shields rectifier output and PFC controller inputs from line-side surges (IEC 61000-4-5, 2kV/1.2/50μs). IC Role / Device Role / Timing Role: Primary surge limiter on DC bus rail, positioned upstream of bulk capacitor and switching controller. Use Value: Absorbs 5000W pulses without degradation, maintaining system uptime in factory automation power systems. |
| Automotive Infotainment Display Interface | Telecom Power Feeding Circuit (PoE) |
Use Scenario: Guards LVDS or FPD-Link III data lines connecting head unit to display against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed differential pair-to-ground to preserve signal integrity. Use Value: Delivers sub-1ps response and <2µA leakage at 78V, avoiding data corruption or false triggering in high-speed video links. | Use Scenario: Protects midspan PoE injectors and PD controllers from induced surges on Ethernet pairs carrying 48V DC power. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional device used in back-to-back configuration for common-mode surge suppression. Use Value: Withstands repeated 10/1000μs surges up to 39.7A while maintaining VWM margin above 48V nominal rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ78A | Lower peak power (600W), same DO-214AA package, 78V VWM, 126V VC at 4.8A | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy IEC 61000-4-2/4-4 events | Select only when surge energy is ≤600W and board space allows larger pitch DO-214AA. |
| 5.0SMDJ78A | Same electrical specs but non-AEC-Q101 qualified; identical DO-214AB package and marking code 5PGT | Lacks automotive qualification; acceptable for industrial/commercial power supplies not requiring AEC validation | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated. |
Compared with SMBJ78A and 5.0SMDJ78A, the 5.0SMDJ78AHM6G uniquely combines AEC-Q101 qualification, 5000W pulse rating, and DO-214AB packaging - making it the only option among the three validated for under-hood automotive surge immunity without derating or parallel devices.
Availability
5.0SMDJ78AHM6G is available at Aetrix Electronics and suitable for automotive body electronics, industrial AC/DC power supplies, and telecom power feeding circuits requiring stable component supply and full AEC-Q101 compliance.
Supply support for 5.0SMDJ78AHM6G 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, and rectifiers, with global distribution and AEC-Q101-compliant production lines.
The 5.0SMDJxxAH series was designed specifically for high-energy transient suppression in automotive and industrial power systems, emphasizing robustness under repetitive surge stress and compatibility with automated SMT assembly.
FAQ
What is the peak pulse current rating of the 5.0SMDJ78AHM6G?
The 5.0SMDJ78AHM6G has a maximum peak impulse current (IPP) of 39.7A under the standardized 10/1000μs waveform. This value is derived directly from its 5000W peak pulse power rating and 126V clamping voltage (IPP = PPPPM/VC). It reflects the highest transient current the 5.0SMDJ78AHM6G can safely divert without parametric shift or failure when mounted on a 16mm × 16mm copper pad.
Is the 5.0SMDJ78AHM6G unidirectional or bidirectional?
5.0SMDJ78AHM6G is a unidirectional TVS diode, indicated by the "AH" suffix and confirmed by its single-polarity breakdown specification (VBR min/max at 1mA, no reverse breakdown data). It conducts only when the cathode is positive relative to the anode, making it suitable for DC rail and signal-line protection where polarity is fixed - unlike bidirectional variants that protect both polarities.
Does the 5.0SMDJ78AHM6G require special handling for moisture sensitivity?
No - the 5.0SMDJ78AHM6G is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/60% RH and requires no dry-packaging or baking prior to SMT reflow. This simplifies manufacturing logistics and eliminates moisture-related popcorning risk during lead-free reflow, a key advantage over higher-MSL TVS devices.
What is the thermal resistance from junction to ambient for the 5.0SMDJ78AHM6G?
The 5.0SMDJ78AHM6G has a junction-to-ambient thermal resistance (RθJA) of 61°C/W when mounted on a 16mm × 16mm copper pad test board. This value guides thermal design for applications with repetitive surges; for example, at 6.25W steady-state dissipation (PD), the junction rise above ambient would be ~383°C - confirming that PD is only relevant for short-duration pulses, not continuous operation.
How does the 5.0SMDJ78AHM6G differ from the 5.0SMDJ78A variant?
The 5.0SMDJ78AHM6G differs from 5.0SMDJ78A solely in qualification status: "H" denotes AEC-Q101 qualification, while the base 5.0SMDJ78A lacks this automotive validation. Electrically and physically - including VWM, VBR, VC, package (DO-214AB), and marking code (5PGT) - the 5.0SMDJ78AHM6G and 5.0SMDJ78A are identical. The "M6G" suffix indicates tape-and-reel packaging (3000 pcs/reel) and green compound.
5.0SMDJ78AHM6G 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):
- 78V
- Voltage - Breakdown (Min):
- 86.7V
- Voltage - Clamping (Max) @ Ipp:
- 126V
- Current - Peak Pulse (10/1000µs):
- 39.7A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
5.0SMDJ78AHM6G FAQ
1.How can I place an order for 5.0SMDJ78AHM6G through Aetrix?
Please submit a Request for Quotation (RFQ) for 5.0SMDJ78AHM6G 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 5.0SMDJ78AHM6G reliable?
The price and inventory of 5.0SMDJ78AHM6G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5.0SMDJ78AHM6G is usually 5 days.
3.What payment methods are accepted for 5.0SMDJ78AHM6G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5.0SMDJ78AHM6G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5.0SMDJ78AHM6G?
5.0SMDJ78AHM6G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5.0SMDJ78AHM6G 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 5.0SMDJ78AHM6G?
For technical support, including 5.0SMDJ78AHM6G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5.0SMDJ78AHM6G requirements.
6.How does Aetrix verify that 5.0SMDJ78AHM6G is sourced from the original manufacturer or authorized distributors?
All 5.0SMDJ78AHM6G 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 5.0SMDJ78AHM6G meets industry standards.
7.What is the process for return or replacement of 5.0SMDJ78AHM6G?
All 5.0SMDJ78AHM6G units undergo pre-shipment inspection (PSI). If there is an issue with 5.0SMDJ78AHM6G, 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 5.0SMDJ78AHM6G part is unused and in its original packaging.
Return procedure for 5.0SMDJ78AHM6G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5.0SMDJ78AHM6G Tags
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