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Taiwan Semiconductor Corporation SMDJ30CA
- Part No.:
- SMDJ30CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ30CA.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,958
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Product details
Overview
SMDJ30CA from Taiwan Semiconductor is a bidirectional 3000W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 30 V working stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR), and 48.4 V maximum clamping voltage (VC) at 62.0 A peak pulse current. It protects telecom and industrial power rails against ESD, load-switching transients, and lightning-induced surges.
For engineers reviewing the SMDJ30CA datasheet, SMDJ30CA pinout, SMDJ30CA application, or SMDJ30CA equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1 ps response time, 175°C junction rating, and DO-214AB mechanical compatibility for high-energy surge immunity in compact PCB layouts.
Technical Context
The SMDJ30CA employs a glass-passivated silicon junction optimized for fast transient suppression in both polarities. Its unidirectional/bidirectional symmetry enables use in AC-coupled lines or DC bus protection without polarity constraints, while its 3000 W peak pulse power rating (10/1000 µs waveform) supports robust immunity to automotive and industrial surge events.
Thermal performance is defined by 75°C/W junction-to-ambient and 15°C/W junction-to-lead resistance, enabling sustained operation up to 175°C junction temperature. The device meets J-STD-020 moisture sensitivity level 1 and JESD 201 Class 2 whisker resistance, ensuring reliability in automated SMT assembly and harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1 mA | 33.3–36.8 V - Verified breakdown threshold ensures predictable turn-on during transients |
| VC @ IPPM=62.0 A | 48.4 V - Clamped voltage limits downstream IC stress during 3000 W surge events |
| PPK | 3000 W - Peak pulse power handling per 10/1000 µs waveform per IEC 61000-4-5 |
| TJ MAX | 175°C - Enables operation in under-hood or industrial enclosures without thermal derating |
| Response time | <1.0 ps - Sub-picosecond junction response prevents voltage overshoot before clamping |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 7.11 mm x 6.22 mm footprint and 2.3 mm height |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (bidirectional operation renders band non-functional but retained for marking consistency).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode Band Side) | Transient return path (bidirectional) | Functions as either anode or cathode depending on transient polarity; no fixed polarity assignment |
| Cathode (Opposite Band Side) | Transient return path (bidirectional) | Electrically symmetric with anode terminal; identical clamping behavior in both directions |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or floating DC buses without external polarity management |
| ISO 7637-2 compliance | Validated for automotive load-dump and switching transient immunity (Pulse 1/2a/2b/3a/3b) |
| Glass passivated junction | Ensures stable VBR over life and resistance to humidity-induced parameter drift |
| Level 1 moisture sensitivity | Eliminates bake requirements prior to reflow, supporting standard J-STD-020 SMT processes |
| UL 94V-0 molding compound | Prevents flame propagation during fault conditions in enclosed industrial equipment |
Applications
| Telecom Line Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting RS-485/RS-232 data lines in base stations and remote terminals from induced lightning surges and ESD. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential pair to limit common-mode transients to safe levels. Use Value: 48.4 V clamping voltage ensures transceivers remain within absolute maximum ratings during 1 kV/500 A surge events. | Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring transients and relay coil kickback. IC Role / Device Role / Timing Role: Primary surge shunt connected between input line and ground, absorbing energy before reaching optocoupler input stage. Use Value: 3000 W peak power rating handles repetitive 200 V/10 A transients per IEC 61000-4-4 without degradation. |
| Automotive Body Control Module | Consumer Power Adapter Input Stage |
Use Scenario: Suppressing load-dump pulses on 12 V supply rails feeding microcontrollers and CAN transceivers in BCMs. IC Role / Device Role / Timing Role: High-energy TVS placed at main power entry point to clamp ISO 7637-2 Pulse 5a (load dump) to ≤48.4 V. Use Value: 175°C junction rating allows direct mounting near hot power components without thermal derating. | Use Scenario: Protecting AC-DC adapter primary-side rectifier and controller ICs from mains-borne surges and EFT bursts. IC Role / Device Role / Timing Role: Secondary-side TVS on low-voltage DC output rail to prevent overvoltage damage during regulator failure or feedback loop loss. Use Value: Bidirectional configuration accommodates reverse-polarity faults and accidental AC coupling without additional components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC30CA (Littelfuse) | Same DO-214AB package, 30 V VWM, but 49.9 V VC @ 60 A; slightly higher clamping voltage | Marginally reduced protection level for sensitive 3.3 V or 5 V logic interfaces | Select when UL 94V-0 and J-STD-020 Level 1 compliance are secondary to cost-sensitive volume production |
| P6SMB30CA (ON Semiconductor) | DO-214AA (SMB) package, lower 2000 W PPK rating, 50.0 V VC @ 40 A | Insufficient for ISO 7637-2 Pulse 5a load-dump; limited to lower-energy ESD-only applications | Choose only for space-constrained designs where 3000 W rating is not required and SMB footprint is preferred |
Compared with SAC30CA and P6SMB30CA, the SMDJ30CA delivers superior 3000 W surge handling and tighter 48.4 V clamping in the industry-standard DO-214AB package, making it optimal for automotive and industrial systems requiring full ISO 7637-2 immunity without layout redesign.
Availability
SMDJ30CA is available at Aetrix Electronics and suitable for telecom line protection, industrial PLC I/O protection, automotive body control modules, and consumer power adapter input stages requiring stable component supply and long-term lifecycle support.
Supply support for SMDJ30CA 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 qualified product lines.
The SMDJ series was developed specifically for high-reliability surface-mount surge protection in automotive, industrial, and telecom infrastructure, emphasizing ISO 7637-2 compliance, thermal robustness, and automated assembly compatibility.
FAQ
What is the maximum clamping voltage of the SMDJ30CA under rated surge conditions?
The SMDJ30CA has a maximum clamping voltage (VC) of 48.4 V at 62.0 A peak pulse current (IPPM), measured using the 10/1000 µs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during a 3000 W transient event. The SMDJ30CA maintains this clamping performance due to its glass-passivated junction and low dynamic impedance.
Is the SMDJ30CA suitable for automotive load-dump protection per ISO 7637-2?
Yes, the SMDJ30CA is explicitly validated for ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b, including load-dump simulation (Pulse 5a). Its 3000 W peak power rating, 48.4 V clamping voltage, and 175°C junction rating make it appropriate for 12 V automotive systems such as body control modules. The SMDJ30CA's DO-214AB package provides sufficient thermal mass to absorb repeated load-dump events without degradation.
How does the bidirectional configuration of the SMDJ30CA affect its placement on the PCB?
The SMDJ30CA's bidirectional design eliminates polarity sensitivity, allowing placement across any two nodes requiring transient suppression-such as AC signal lines, floating DC buses, or differential pairs-without regard to cathode band orientation. While the DO-214AB package retains the cathode band marking for consistency with unidirectional variants, it serves no functional role in the SMDJ30CA. This simplifies layout and reduces BOM complexity in mixed-signal systems.
What is the moisture sensitivity level (MSL) of the SMDJ30CA and what does it mean for manufacturing?
The SMDJ30CA is rated MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions (≤30°C/60% RH) without baking prior to reflow soldering. This eliminates pre-conditioning steps in SMT lines, reduces floor-life tracking overhead, and supports just-in-time assembly. The Level 1 rating results from hermetic molding and glass passivation, which prevent moisture ingress into the silicon junction during reflow thermal profiles.
Does the SMDJ30CA meet RoHS and halogen-free requirements?
Yes, the SMDJ30CA is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants or chlorine-based additives, and all terminations use matte tin plating without lead, cadmium, mercury, hexavalent chromium, or polybrominated biphenyls. These certifications are verified through TSC's material declarations and third-party lab testing, supporting compliance in EU, China, and other regulated markets.
SMDJ30CA 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 62A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ30CA FAQ
1.How can I place an order for SMDJ30CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ30CA 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 SMDJ30CA reliable?
The price and inventory of SMDJ30CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ30CA is usually 5 days.
3.What payment methods are accepted for SMDJ30CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ30CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ30CA?
SMDJ30CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ30CA 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 SMDJ30CA?
For technical support, including SMDJ30CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ30CA requirements.
6.How does Aetrix verify that SMDJ30CA is sourced from the original manufacturer or authorized distributors?
All SMDJ30CA 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 SMDJ30CA meets industry standards.
7.What is the process for return or replacement of SMDJ30CA?
All SMDJ30CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ30CA, 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 SMDJ30CA part is unused and in its original packaging.
Return procedure for SMDJ30CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ30CA Tags
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