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Taiwan Semiconductor Corporation SMDJ75AH
- Part No.:
- SMDJ75AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ75AH.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,971
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Product details
Overview
SMDJ75AH from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode with a 75V working stand-off voltage, 83.3–92.1V breakdown voltage at 1mA test current, and 121V maximum clamping voltage at 24.8A peak pulse current. It is AEC-Q101 qualified and designed for automotive and industrial surge protection in power supply rails and I/O lines.
For engineers reviewing the SMDJ75AH datasheet, SMDJ75AH pinout, SMDJ75AH application, or SMDJ75AH equivalent, key selection criteria include its DO-214AB (SMC) package, 175°C max junction temperature, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, fast sub-1ps response time, and unidirectional polarity marking.
Technical Context
The SMDJ75AH operates as a unidirectional avalanche diode, clamping transients by entering breakdown when reverse voltage exceeds VBR (83.3–92.1V), limiting downstream voltage to ≤121V at 24.8A. Its glass-passivated junction ensures stable leakage (<1µA at 75V) and robust ESD immunity.
Thermally, it features RθJA = 75°C/W and RθJL = 15°C/W, enabling reliable operation up to 175°C junction temperature. It meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity-critical for lead-free reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1mA | 83.3–92.1 V - Confirmed breakdown threshold ensuring predictable turn-on during transients |
| VC @ IPPM=24.8A | 121 V - Clamped voltage seen by protected circuit under 3000W 10/1000µs surge |
| PPK | 3000 W - Peak pulse power handling per single 1ms event, derated above 25°C ambient |
| IPPM | 24.8 A - Maximum non-repetitive peak pulse current supported at rated clamping voltage |
| TJ max | +175 °C - Enables use in under-hood automotive and high-temperature industrial environments |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 7.11 × 6.22 mm footprint and matte tin leads |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with cathode band marking for unidirectional polarity; terminals are matte tin-plated leads compatible with J-STD-002 soldering standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Marked with band; connected to protected line (e.g., 75V rail or signal input) to clamp positive transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Glass passivated junction | Ensures low leakage (<1 µA at VWM) and long-term stability under thermal/humidity stress |
| Sub-1 ps response time | Clamps ESD and fast transients before sensitive ICs experience overstress |
| J-STD-020 Level 1 MSL | Zero bake requirement prior to reflow; supports standard SMT assembly without moisture-related popcorning |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 75V battery-fed control modules (e.g., body controllers, lighting drivers) from load dump and alternator surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive transients. Use Value: Limits voltage to ≤121V during 3000W ISO 7637-2 Pulse 5a events, preventing MOSFET gate oxide failure and MCU brownout. | Use Scenario: Shielding 24–75V digital input channels on programmable logic controllers from field-wiring induced transients. IC Role / Device Role / Timing Role: Standoff diode on each channel's input node, absorbing repetitive switching noise and lightning-induced surges. Use Value: Maintains <1 µA leakage at 75V, preserving signal integrity while surviving >1000 surges per IEC 61000-4-5 Level 4. |
| Telecom DC Power Interface | Motor Drive Gate Driver Protection |
Use Scenario: Safeguarding PoE-powered equipment front-end rectifiers and DC-DC converters against Ethernet cable-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on 54–75V intermediate bus, positioned upstream of DC-DC controller. Use Value: Withstands 10/1000µs surges up to 24.8A without degradation, meeting GR-1089-CORE telecom immunity requirements. | Use Scenario: Protecting high-side gate driver ICs in 75V BLDC motor inverters from shoot-through-induced voltage spikes. IC Role / Device Role / Timing Role: Clamp diode across gate-source terminals or bootstrap supply rail to suppress Miller-induced overshoot. Use Value: Fast <1ps response prevents false turn-on of Si MOSFETs; 175°C rating matches gate driver thermal environment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ75A | Same DO-214AC (SMA) package; 3000W rating; VBR = 83.3–92.1V; VC = 121V at 24.8A - identical electrical specs but smaller 4.5 × 2.7 mm footprint | Requires PCB layout revision due to smaller pad area and different thermal mass | Select when board space is constrained and thermal derating can be validated per RθJA = 100°C/W |
| ON Semiconductor 1.5SMC75A | DO-214AB (SMC) package; same outline; VBR = 83.3–92.1V; VC = 121V at 24.8A; AEC-Q101 qualified; RoHS/halogen-free compliant | No functional or mechanical change - direct drop-in replacement with identical mounting and performance | Preferred for dual-sourcing where Taiwan Semiconductor allocation is limited; verified pin-to-pin and parametric match |
Compared with SMAJ75A and 1.5SMC75A, the SMDJ75AH offers identical clamping performance and AEC-Q101 qualification in the DO-214AB package, but only 1.5SMC75A provides guaranteed mechanical and electrical drop-in compatibility without layout modification.
Availability
SMDJ75AH is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC I/O hardening, and telecom DC interface surge suppression requiring stable component supply across production lifecycles.
Supply support for SMDJ75AH 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 automotive, industrial, and consumer markets since 1979.
The SMDJ75AH belongs to TSC's AEC-Q101-qualified SMDJ series of high-power TVS diodes, engineered specifically for ISO 7637-2-compliant automotive and harsh-environment industrial surge protection.
FAQ
What is the polarity configuration of the SMDJ75AH?
The SMDJ75AH is a unidirectional TVS diode, marked with a cathode band indicating the clamping terminal. It conducts in forward bias like a standard diode and clamps reverse transients above its breakdown voltage. Bidirectional variants (e.g., SMDJ75CAH) exist but are distinct part numbers; the SMDJ75AH must be oriented with cathode toward the protected line to function correctly.
Does the SMDJ75AH meet automotive qualification standards?
Yes, the SMDJ75AH is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. Its construction-including glass-passivated junction, JESD201 Class 2 whisker resistance, and J-STD-020 Level 1 moisture sensitivity-supports deployment in engine control units, body electronics, and ADAS subsystems per automotive reliability requirements.
What is the maximum clamping voltage of the SMDJ75AH under surge conditions?
The SMDJ75AH has a maximum clamping voltage (VC) of 121 V at 24.8 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is guaranteed across temperature and lifetime, ensuring downstream components see no more than 121 V during a 3000W transient event.
Can the SMDJ75AH be used in bidirectional applications?
No-the SMDJ75AH is unidirectional only. For bidirectional transient suppression, the designated variant is SMDJ75CAH (with "CAH" suffix), which provides symmetrical clamping in both polarities. Using SMDJ75AH in reverse-biased AC or bipolar signal paths will result in forward conduction and potential failure; always verify polarity alignment in schematic and layout.
What is the thermal resistance profile of the SMDJ75AH?
The SMDJ75AH has a junction-to-ambient thermal resistance (RθJA) of 75°C/W and junction-to-lead resistance (RθJL) of 15°C/W, measured under standard JEDEC test conditions. These values enable effective heat dissipation in typical SMC footprints with copper pour, supporting continuous operation up to 175°C junction temperature when mounted per recommended pad layout.
SMDJ75AH 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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 24.8A
- 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)
SMDJ75AH FAQ
1.How can I place an order for SMDJ75AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ75AH 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 SMDJ75AH reliable?
The price and inventory of SMDJ75AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ75AH is usually 5 days.
3.What payment methods are accepted for SMDJ75AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ75AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ75AH?
SMDJ75AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ75AH 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 SMDJ75AH?
For technical support, including SMDJ75AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ75AH requirements.
6.How does Aetrix verify that SMDJ75AH is sourced from the original manufacturer or authorized distributors?
All SMDJ75AH 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 SMDJ75AH meets industry standards.
7.What is the process for return or replacement of SMDJ75AH?
All SMDJ75AH units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ75AH, 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 SMDJ75AH part is unused and in its original packaging.
Return procedure for SMDJ75AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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