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Taiwan Semiconductor Corporation SMDJ54CAH
- Part No.:
- SMDJ54CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ54CAH.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,631
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Product details
Overview
SMDJ54CAH from Taiwan Semiconductor is a bidirectional 54 V standoff, 60.0–66.3 V breakdown, 3000 W peak pulse power Transient Voltage Suppressor in DO-214AB (SMC) package, designed for automotive-grade ESD and load-switch transient protection in power supply rails and I/O interfaces.
For engineers reviewing the SMDJ54CAH datasheet, SMDJ54CAH pinout, SMDJ54CAH application, or SMDJ54CAH equivalent, key selection criteria include clamping voltage (87.1 V @ 34.4 A), AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and unidirectional/bidirectional configuration flexibility via AH/CAH suffixes.
Technical Context
SMDJ54CAH is a glass-passivated, bipolar TVS diode optimized for fast transient suppression with sub-1 ps response time and 87.1 V maximum clamping voltage at 34.4 A peak impulse current. Its junction temperature range spans −55 °C to +175 °C, supporting under-hood automotive environments.
The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, enabling robust reflow compatibility. Thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), confirming suitability for high-power surge events without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 60.0 V / 66.3 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold consistency |
| PPK | 3000 W - Peak pulse power handling capability per 10/1000 µs waveform, critical for lightning and load-dump immunity |
| VC @ IPPM | 87.1 V @ 34.4 A - Clamped voltage during worst-case surge, directly limiting stress on downstream ICs |
| TJ max | +175 °C - Maximum junction temperature, enabling operation in high-ambient automotive engine compartments |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance, used to calculate safe power derating above 25 °C ambient |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path | Both terminals function identically; no polarity dependency-enables placement flexibility on PCB |
| Case (exposed metal pad) | Thermal conduction path | Integral to thermal performance; requires adequate copper area for RθJA = 75 °C/W rating |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including temperature cycling, HTRB, and ESD |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Sub-1 ps response time | Clamps transients before sensitive logic or analog circuitry can be damaged, preserving signal integrity |
| UL 94V-0 molding compound | Self-extinguishing encapsulation prevents flame propagation in safety-critical systems |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Primary clamping element placed at power entry point to limit rail voltage excursion to ≤87.1 V. Use Value: Prevents overvoltage damage to microcontrollers, CAN transceivers, and voltage regulators during 3000 W surge events. | Use Scenario: Shielding digital input modules from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional shunt protector across isolated 24 V DC inputs to absorb both positive and negative polarity spikes. Use Value: Eliminates need for separate uni-directional devices, reducing BOM count and layout space while maintaining <1 ps response. |
| Telecom Line Interface Protection | Consumer USB-C Port ESD Hardening |
Use Scenario: Safeguarding Ethernet PHYs and PoE injectors from lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Secondary-level TVS placed after common-mode chokes to clamp differential-mode transients. Use Value: Clamps to 87.1 V within 1 ps, preventing latch-up or gate oxide rupture in high-speed PHY ICs. | Use Scenario: Reinforcing ESD robustness of USB-C receptacles exposed to human-body-model (HBM) and IEC 61000-4-2 contact discharge. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) bidirectional clamp across VBUS and CC lines. Use Value: Maintains signal integrity up to 10 Gbps while suppressing ±15 kV contact/±30 kV air-gap ESD per IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC54CA | Lower PPK (1500 W), higher VC (93.6 V @ 16.1 A), same DO-214AB package | Not rated for ISO 7637-2 Pulse 1; limited to lower-energy transients | Select when cost sensitivity outweighs automotive-grade surge margin and AEC-Q101 is not required |
| SMLJ54CA | Same VWM/VBR/VC specs, but lower PPK (1500 W), smaller DO-214AA (SMA) package | Reduced thermal mass limits sustained surge duty cycle; unsuitable for repeated load-dump events | Choose for space-constrained consumer designs where 3000 W peak power is not mandated |
Compared with SAC54CA and SMLJ54CA, the SMDJ54CAH delivers 2× peak power headroom, certified AEC-Q101 reliability, and full ISO 7637-2 coverage-making it the only option qualified for front-end automotive power rail protection where single-event survivability is non-negotiable.
Availability
SMDJ54CAH is available at Aetrix Electronics and suitable for automotive control units, industrial programmable logic controllers, telecom infrastructure equipment, and USB-C power delivery systems requiring stable component supply across multi-year production cycles.
Supply support for SMDJ54CAH 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, rectifiers, and MOSFETs, with global distribution and AEC-Q101-compliant production lines.
The SMDJ series was engineered specifically for high-reliability automotive and industrial transient suppression, emphasizing ruggedized packaging, extended temperature operation, and standardized ISO 7637-2 compliance across voltage grades.
FAQ
What does the "CAH" suffix indicate in SMDJ54CAH?
The "CAH" suffix denotes a bidirectional configuration-meaning the SMDJ54CAH functions identically in both polarities, with no cathode marking required. This contrasts with the "AH" suffix (e.g., SMDJ54AH), which is unidirectional and features a cathode band. The SMDJ54CAH's symmetrical structure simplifies PCB layout and supports AC-coupled or floating-line protection schemes without polarity concerns.
Is SMDJ54CAH AEC-Q101 qualified?
Yes, SMDJ54CAH is explicitly AEC-Q101 qualified per the manufacturer's documentation. It has undergone stress testing including high-temperature reverse bias (HTRB), temperature cycling, and ESD qualification to meet automotive reliability standards. This certification validates its use in engine control modules, body electronics, and ADAS subsystems where component failure is unacceptable.
What is the maximum clamping voltage of SMDJ54CAH and at what current?
The maximum clamping voltage of SMDJ54CAH is 87.1 V, measured at a peak impulse current (IPPM) of 34.4 A under the standard 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuits during a 3000 W transient event and is critical for ensuring downstream ICs remain within their absolute maximum ratings.
Does SMDJ54CAH require special PCB layout considerations?
Yes-SMDJ54CAH demands low-inductance layout: short, wide traces to minimize parasitic inductance that could elevate clamping voltage during fast transients. Its DO-214AB (SMC) package also requires ≥100 mm² of thermal copper pour connected to both terminals to achieve the specified RθJA of 75 °C/W. Avoid routing sensitive signals near the device body to prevent coupling.
Can SMDJ54CAH be used in place of SMDJ54AH?
SMDJ54CAH can replace SMDJ54AH in bidirectional applications, but not vice versa. Since SMDJ54AH is unidirectional (cathode-marked), using it in AC or floating configurations risks reverse breakdown failure. The SMDJ54CAH's symmetrical design ensures safe operation regardless of voltage polarity-making it the preferred choice for Ethernet, USB-C, or any system with undefined or alternating surge directionality.
SMDJ54CAH 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 34.4A
- 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)
SMDJ54CAH FAQ
1.How can I place an order for SMDJ54CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ54CAH 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 SMDJ54CAH reliable?
The price and inventory of SMDJ54CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ54CAH is usually 5 days.
3.What payment methods are accepted for SMDJ54CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ54CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ54CAH?
SMDJ54CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ54CAH 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 SMDJ54CAH?
For technical support, including SMDJ54CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ54CAH requirements.
6.How does Aetrix verify that SMDJ54CAH is sourced from the original manufacturer or authorized distributors?
All SMDJ54CAH 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 SMDJ54CAH meets industry standards.
7.What is the process for return or replacement of SMDJ54CAH?
All SMDJ54CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ54CAH, 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 SMDJ54CAH part is unused and in its original packaging.
Return procedure for SMDJ54CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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