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Taiwan Semiconductor Corporation SMDJ64AH
- Part No.:
- SMDJ64AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ64AH.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,794
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Product details
Overview
SMDJ64AH from Taiwan Semiconductor is a bidirectional 3000W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 64V working stand-off voltage (VWM), 71.1–78.6V breakdown voltage (VBR), and 103V clamping voltage (VC) at 29.1A peak pulse current. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and ESD protection.
For engineers reviewing the SMDJ64AH datasheet, SMDJ64AH pinout, SMDJ64AH application, or SMDJ64AH equivalent, key selection criteria include bidirectional clamping capability, 175°C max junction temperature, sub-1ps response time, compliance with automotive transients, and DO-214AB mechanical compatibility in space-constrained PCB layouts.
Technical Context
The SMDJ64AH is a single-die, glass-passivated, bidirectional TVS diode designed for high-energy transient suppression in automotive and industrial power rails. Its electrical characteristics apply identically in both directions, with symmetrical VBR min/max (71.1V/78.6V), VC = 103V at IPPM = 29.1A, and fast response time <1.0ps.
It operates across -55°C to +175°C junction temperature range, features JESD201 Class 2 whisker resistance, moisture sensitivity level 1 (J-STD-020), and UL 94V-0 molding compound - all supporting under-hood automotive deployment per AEC-Q101 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail margin. |
| VBR @ IT=1mA | 71.1–78.6 V - Breakdown threshold range; ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 103 V - Clamped voltage at 29.1 A peak pulse; determines protected circuit's maximum overvoltage exposure. |
| PPK | 3000 W - Peak pulse power rating (1 ms, 10/1000 µs waveform); defines single-event surge energy handling. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in high-ambient under-hood environments. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; informs heatsinking needs for sustained power dissipation. |
| Response time | <1.0 ps - Sub-picosecond turn-on; critical for suppressing ESD and fast-rising transients before IC damage. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration, matte tin-plated leads, polarity marked by cathode band (not functional in bidirectional mode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient path | No functional polarity - terminals interchangeable; clamps voltage above |VWM| in either direction. |
| Case (cathode band marking) | Reference indicator only | Marking present but non-functional; no internal asymmetry - device electrically identical in both orientations. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics, including temperature cycling, humidity, and mechanical shock testing. |
| ISO 7637-2 compliance | Withstands defined automotive transients (Pulse 1, 2a, 2b, 3a, 3b) without degradation or failure. |
| Glass passivated junction | Enhances long-term stability and leakage performance under high-humidity or high-bias stress conditions. |
| Level 1 moisture sensitivity | Enables standard SMT reflow without baking or special handling - reduces manufacturing overhead. |
| UL 94V-0 molding compound | Self-extinguishing encapsulation material - satisfies flammability safety requirements in enclosed systems. |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12V/24V battery-fed ECUs, body controllers, and infotainment modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across power input pins to shunt surge energy to ground. Use Value: Limits voltage to ≤103V during 3000W pulses, preventing latch-up or gate oxide rupture in downstream PMICs and microcontrollers. | Use Scenario: Safeguarding analog/digital I/O channels of programmable logic controllers exposed to field-wiring surges and inductive kickback. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on signal lines and supply inputs before isolation or conditioning stages. Use Value: Sub-1ps response ensures clamping initiates before transient propagates into precision ADCs or isolated RS-485 transceivers. |
| Telecom Base Station Power Input | Consumer Appliance Motor Drive Supply |
Use Scenario: Securing primary DC input of remote radio units and baseband processing boards against lightning-induced surges on outdoor power feeds. IC Role / Device Role / Timing Role: High-power TVS placed at board-level entry point, coordinated with upstream fuses and filters. Use Value: 3000W PPK rating handles multi-kA induced surges while maintaining stable VWM for uninterrupted 48V system operation. | Use Scenario: Protecting BLDC motor driver power stages in smart appliances (e.g., washing machines, HVAC fans) from commutation spikes and ESD events. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC bus to clamp switching node overshoot and ground bounce. Use Value: 175°C TJ max allows placement near hot MOSFETs without derating; DO-214AB footprint fits tight motor control PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A | Lower PPK (400W), higher VC (104V), same VWM/VBR range, SMA package (smaller, lower thermal mass) | Not suitable for ISO 7637-2 Pulse 1 or load dump; limited to low-energy ESD and signal-line protection | Select only for cost-sensitive consumer applications where 3000W surge immunity is unnecessary. |
| TPSMD64A | Same PPK (3000W), identical VWM/VBR/VC specs, AEC-Q101 qualified, DO-214AB package, but higher IR (5 µA vs. 1 µA at VWM) | Acceptable for same automotive and industrial use cases; slightly higher leakage may affect ultra-low-power sleep modes | Drop-in alternative if Taiwan Semiconductor supply constraints exist; verify leakage impact in battery-backed systems. |
Compared with SMDJ64AH, SMAJ64A offers reduced surge robustness and smaller package size, limiting its use to non-automotive applications; TPSMD64A provides functionally equivalent protection with minor leakage trade-off, enabling direct substitution where sourcing flexibility is required.
Availability
SMDJ64AH is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom power input hardening requiring stable component supply and AEC-Q101-compliant surge immunity.
Supply support for SMDJ64AH 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 is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and automotive-grade components.
The SMDJ series was developed specifically for high-reliability automotive and industrial transient suppression, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in surface-mount packages.
FAQ
What does the "CAH" suffix indicate for SMDJ64AH?
The "CAH" suffix denotes the bidirectional variant of the SMDJ64AH - SMDJ64CAH. While SMDJ64AH is unidirectional, SMDJ64CAH is explicitly specified for bidirectional operation, with symmetric electrical characteristics in both polarities. The datasheet confirms that for SMDJ10AH–SMDJ64AH, the CAH suffix indicates bidirectional functionality. SMDJ64AH itself is unidirectional; correct part for bidirectional use is SMDJ64CAH.
Is SMDJ64AH AEC-Q101 qualified?
Yes, SMDJ64AH is explicitly AEC-Q101 qualified per the provided documentation. This qualification covers stress tests including temperature cycling, high-temperature operating life, and mechanical shock - confirming suitability for automotive under-hood and chassis applications where reliability under thermal and vibration stress is mandatory.
What is the clamping voltage of SMDJ64AH at its rated peak pulse current?
The clamping voltage (VC) of SMDJ64AH is 103 V at a peak pulse current (IPPM) of 29.1 A, measured using the standard 10/1000 µs waveform. This value defines the maximum voltage seen by downstream circuitry during a full-rated 3000W transient event, ensuring protected ICs remain within their absolute maximum ratings.
Does SMDJ64AH meet ISO 7637-2 automotive transient standards?
Yes, SMDJ64AH meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements as stated in the official Taiwan Semiconductor documentation. This certification validates its ability to suppress real-world automotive transients including load dump, battery reversal, and coupled noise without failure or parameter shift.
What is the thermal resistance from junction to ambient for SMDJ64AH?
The junction-to-ambient thermal resistance (RθJA) of SMDJ64AH is 75 °C/W under standard JEDEC test conditions (single device on 1-inch² FR-4 board with 2 oz copper). This value guides thermal design - for example, at 6.5W steady-state dissipation, expected temperature rise above ambient is ~488°C, confirming the device must be used in pulsed, not continuous, power modes.
SMDJ64AH 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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 29.1A
- 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)
SMDJ64AH FAQ
1.How can I place an order for SMDJ64AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ64AH 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 SMDJ64AH reliable?
The price and inventory of SMDJ64AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ64AH is usually 5 days.
3.What payment methods are accepted for SMDJ64AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ64AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ64AH?
SMDJ64AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ64AH 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 SMDJ64AH?
For technical support, including SMDJ64AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ64AH requirements.
6.How does Aetrix verify that SMDJ64AH is sourced from the original manufacturer or authorized distributors?
All SMDJ64AH 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 SMDJ64AH meets industry standards.
7.What is the process for return or replacement of SMDJ64AH?
All SMDJ64AH units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ64AH, 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 SMDJ64AH part is unused and in its original packaging.
Return procedure for SMDJ64AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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