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Taiwan Semiconductor Corporation SMCJ58
- Part No.:
- SMCJ58
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ58.pdf
- Description:
- 1500W, 71.6V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SMCJ58 from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 58V working stand-off voltage (VWM), 64.4–78.7V breakdown voltage (VBR), and 103V maximum clamping voltage (VC) at 15A peak impulse current-designed for automotive load-dump and inductive switching protection in power supply rails.
For engineers reviewing the SMCJ58 datasheet, SMCJ58 pinout, SMCJ58 application, or SMCJ58 equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature limits (−55°C to +150°C), moisture sensitivity level (MSL 1), and compatibility with automated SMT placement on 12V/24V vehicle subsystems.
Technical Context
The SMCJ58 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (64.4–78.7V at 1mA test current), clamping transients to ≤103V within <1.0ps response time. It sustains 1500W peak pulse power (tp = 1ms) and handles up to 200A non-repetitive forward surge current (IFSM).
Thermal design relies on RθJA = 55°C/W and RθJC = 10°C/W, enabling operation up to TJ = 150°C. Its glass-passivated junction and matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 64.4 V / 78.7 V @ 1 mA - Ensures reliable turn-on margin above system nominal voltage |
| VC @ IPPM | 103 V @ 15 A - Clamping voltage during 10/1000μs surge defines protected circuit stress level |
| PPK | 1500 W - Peak pulse power rating determines survivability of ISO 7637-2 Pulse 5a (load dump) |
| IR @ VWM | ≤1 μA - Ultra-low leakage preserves battery-backed or low-power standby circuits |
| TJ max | +150 °C - Enables use in under-hood automotive environments without derating |
| Package | DO-214AB (SMC) - Standardized SMT footprint compatible with IPC-7351B land pattern |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking; two-terminal device with anode (unmarked end) and cathode (banded end). Leads are matte tin-plated, compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side return path in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12V rail); conducts avalanche current during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching transients) |
| MSL Level 1 rating | Allows unlimited floor life and reflow without baking-ideal for high-volume SMT production |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green electronics manufacturing |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: 12V battery-fed ECU power input subjected to load-dump transients up to 40V for 400ms per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp surges before they reach DC-DC converters and microcontrollers. Use Value: Clamps peak voltage to ≤103V while absorbing 1500W, preventing latch-up or permanent damage to downstream 36V-rated regulators. | Use Scenario: 24V digital input channel exposed to relay-coil flyback and EFT bursts in factory automation cabinets. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast transients (<1.0ps rise time) before signal conditioning circuitry. Use Value: Sub-μA leakage avoids false triggering of optocoupler inputs; 15A IPPM rating withstands repetitive 2kV EFT bursts (IEC 61000-4-4). |
| LED Driver Overvoltage Clamp | Telecom PoE Port Protection |
Use Scenario: Constant-current LED driver board powered from 48V DC supply, vulnerable to wiring-induced surges during field maintenance. IC Role / Device Role / Timing Role: SMCJ58 placed across output terminals to limit voltage excursion during open-circuit or hot-plug events. Use Value: 103V clamping ensures MOSFETs and current-sense amplifiers remain within safe SOA, even during 15A transient events. | Use Scenario: 4-pair PoE++ (IEEE 802.3bt) port interface where data lines may experience induced surges from nearby AC cables or lightning coupling. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per polarity) protect PHY transceivers on PSE/PD side against common-mode transients. Use Value: MSL Level 1 and J-STD-002 compliance support automated assembly of high-density PoE modules without post-reflow handling concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A | Lower PPK (600W), smaller SMB package (DO-214AA), tighter VBR tolerance (64.4–71.2V) | Lower energy handling; suitable only for lighter-duty ESD/EFT, not load-dump | Select SMCJ58 for 1500W ISO 7637-2 Pulse 5a compliance; SMBJ58A only where space constraints override energy requirements |
| 1.5KE56A | Through-hole TO-218 package, same VWM/VBR range, but slower response (>1ps) and no MSL rating | Not suitable for automated SMT; requires wave soldering and manual inspection | Choose SMCJ58 for SMT production, automotive qualification, and MSL 1 handling; 1.5KE56A only for legacy through-hole designs |
Compared with SMBJ58A and 1.5KE56A, the SMCJ58 uniquely delivers 1500W surge capability in an MSL Level 1 SMT package with verified ISO 7637-2 Pulse 5a performance-making it the only option among the three qualified for modern automotive power rail protection without layout or process compromise.
Availability
SMCJ58 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, LED driver power stages, and PoE++ port interfaces requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for SMCJ58 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, specializing in TVS diodes, rectifiers, MOSFETs, and power management components since 1979.
The SMCJ series was developed specifically for high-energy transient suppression in automotive and industrial environments, emphasizing robustness under ISO 7637-2, AEC-Q200 readiness, and full SMT manufacturability.
FAQ
What is the clamping voltage of SMCJ58 under a 10/1000μs surge?
The SMCJ58 has a maximum clamping voltage (VC) of 103 V when subjected to a 15 A peak impulse current (IPPM) under the standard 10/1000μs waveform defined in IEC 61000-4-5. This value is measured per the manufacturer's test conditions and directly defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ58 datasheet confirms this VC rating applies at TA = 25°C with specified test setup.
Is SMCJ58 unidirectional or bidirectional?
The SMCJ58 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix and confirmed by its single cathode band marking and forward voltage specification (VF = 3.5 V @ 100 A). Bidirectional variants are designated SMCJ58C or SMCJ58CA. The SMCJ58 is intended for DC rail protection where polarity is fixed, such as 12V or 24V automotive power inputs.
Does SMCJ58 meet automotive qualification standards?
The SMCJ58 is designed to meet ISO 7637-2 (Pulse 1/2a/2b/3a/3b) and is built on TSC's AEC-Q200–ready platform, though formal AEC-Q200 certification requires part-specific qualification reports. Its glass-passivated junction, MSL Level 1 rating, −55°C to +150°C operating range, and DO-214AB package construction align with automotive under-hood and body-control module requirements. SMCJ58 is widely deployed in automotive applications where these characteristics are mandatory.
What is the maximum steady-state power dissipation of SMCJ58?
The SMCJ58 has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C, as specified in the Absolute Maximum Ratings table. This value reflects continuous DC or low-frequency power handling-not surge capability-and must be derated linearly above 25°C using the RθJA = 55°C/W thermal resistance. For example, at 85°C ambient, PD drops to approximately 2.3 W.
Can SMCJ58 be used in place of SMCJ58A?
No-SMCJ58 and SMCJ58A are distinct variants: SMCJ58 has a VBR range of 64.4–78.7 V, while SMCJ58A tightens the upper bound to 71.2 V (64.4–71.2 V), resulting in lower clamping variance and improved consistency. Their VC ratings also differ (103 V vs. 93.6 V). Substituting SMCJ58 for SMCJ58A may increase clamping voltage in sensitive applications; always verify VBR distribution and clamping performance in the final design using the SMCJ58 datasheet.
SMCJ58 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 15A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ58 FAQ
1.How can I place an order for SMCJ58 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ58 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 SMCJ58 reliable?
The price and inventory of SMCJ58 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ58 is usually 5 days.
3.What payment methods are accepted for SMCJ58?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ58 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ58?
SMCJ58 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ58 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 SMCJ58?
For technical support, including SMCJ58 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ58 requirements.
6.How does Aetrix verify that SMCJ58 is sourced from the original manufacturer or authorized distributors?
All SMCJ58 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 SMCJ58 meets industry standards.
7.What is the process for return or replacement of SMCJ58?
All SMCJ58 units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ58, 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 SMCJ58 part is unused and in its original packaging.
Return procedure for SMCJ58:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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