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Taiwan Semiconductor Corporation SMCJ58A
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- Part No.:
- SMCJ58A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ58A.pdf
- Description:
- TVS DIODE 58VWM 93.6VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:1,193
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Product details
Overview
SMCJ58A from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a 58V working stand-off voltage, 64.4–71.2V breakdown range at 1mA test current, and 93.6V maximum clamping voltage at 16A peak impulse current. It protects power rails and I/O lines in automotive lighting, industrial control, and DC power supplies against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ58A datasheet, SMCJ58A pinout, SMCJ58A application, or SMCJ58A equivalent, this page delivers verified electrical parameters, DO-214AB package details, clamping performance under 10/1000μs surge, thermal resistance values, and direct alternative options for ESD and inductive switching protection design.
Technical Context
The SMCJ58A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its VBR (64.4–71.2V), diverting transient energy to ground while clamping the protected line to ≤93.6V. Its glass-passivated junction ensures stable breakdown and low leakage (<1μA at 58V).
Designed for high-energy pulse suppression, it sustains 1500W peak pulse power (1ms, 10/1000μs waveform), exhibits <1.0ps response time from 0V to VBR, and features RθJA = 55°C/W and RθJC = 10°C/W for thermal management in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR @ IT=1mA | 64.4–71.2 V - Verified breakdown range ensuring reliable turn-on during transients |
| VC @ IPPM=16A | 93.6 V - Clamped voltage during 10/1000μs surge, defining worst-case overvoltage seen by downstream ICs |
| PPK | 1500 W - Peak pulse power handling per single 1ms event, compliant with ISO 7637-2 |
| IR @ VWM | <1 μA - Ultra-low reverse leakage preserves system standby current and signal integrity |
| Junction Temp Range | −55°C to +150°C - Enables deployment in under-hood automotive and industrial environments |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / Ground reference | Connected to system ground or low-side return; defines conduction direction in unidirectional operation |
| Cathode | Protected line connection / Transient input | Connected to the line being protected (e.g., 48V rail); conducts when voltage exceeds VBR relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures consistent VBR tolerance and long-term reliability under repeated surge stress |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and inductive-switching immunity without external filtering |
| Moisture sensitivity level 1 (J-STD-020) | Zero bake requirement prior to reflow; supports standard SMT assembly processes |
| UL 94V-0 molding compound | Meets flammability safety requirements for enclosed industrial and transportation equipment |
Applications
| Automotive Lighting Systems | Industrial DC Power Rails |
|---|---|
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers from load-dump transients in 24V/48V vehicle lighting modules. IC Role / Device Role: Unidirectional TVS placed between power input and ground, clamping surges up to 1500W. Use Value: Limits voltage to ≤93.6V during ISO 7637-2 Pulse 5a events, preventing latch-up or gate oxide damage in sensitive drivers. | Use Scenario: Safeguarding PLC I/O power inputs against inductive kickback from solenoid valves and relay coils. IC Role / Device Role: Standoff protector on 24V supply lines upstream of LDOs and microcontrollers. Use Value: Absorbs 16A peak impulse currents with sub-1ps response, maintaining system uptime during field wiring faults. |
| ESD-Prone Communication Interfaces | DC-DC Converter Input Protection |
Use Scenario: Secondary-level ESD protection on RS-485 transceiver VCC pins exposed to board-level handling and cable coupling. IC Role / Device Role: Low-leakage (≤1μA) clamp limiting fast transients before they reach the IC's internal ESD structures. Use Value: Complements integrated HBM protection by handling higher-energy CDM and IEC 61000-4-2 contact discharges beyond IC capability. | Use Scenario: Input surge suppression for buck converters in telecom power supplies subjected to lightning-induced surges on primary-side DC inputs. IC Role / Device Role: Primary transient absorber placed before input filter capacitors and controller ICs. Use Value: Clamps 10/1000μs surges to 93.6V while dissipating 1500W, preventing overvoltage shutdown or MOSFET avalanche failure. |
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 (Bourns) | Same DO-214AA package, 600W rating, lower PPK (600W vs. 1500W), VC = 93.6V @ 8.3A | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy IEC 61000-4-5 applications | Select SMCJ58A where full 1500W surge margin is required for automotive or heavy-industrial use. |
| 1.5SMC58A (ON Semiconductor) | Identical DO-214AB package and 1500W rating; VBR = 64.4–71.2V, VC = 93.6V @ 16A, same thermal specs | No functional difference; validated drop-in replacement per manufacturer cross-reference | 1.5SMC58A offers identical electrical and mechanical performance with alternate sourcing flexibility. |
Compared with SMBJ58A, SMCJ58A delivers 2.5× higher surge power handling for robust automotive-grade protection; versus 1.5SMC58A, it provides identical clamping and thermal behavior with Taiwan Semiconductor's qualification for extended temperature and humidity reliability testing.
Availability
SMCJ58A is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC power rails, RS-485 interface protection, and DC-DC converter input stages requiring stable component supply across production lifecycles.
Supply support for SMCJ58A 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, and power devices since 1979.
The SMCJ series was engineered specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing ISO 7637-2 compliance, low leakage, and stable clamping under repeated surge stress.
FAQ
What is the clamping voltage of the SMCJ58A under maximum rated surge current?
The SMCJ58A has a maximum clamping voltage (VC) of 93.6 V when subjected to a 10/1000μs peak impulse current of 16 A. This value is measured per JEDEC standards and defines the upper voltage limit imposed on the protected circuit during worst-case transient events, ensuring downstream components remain within safe operating limits.
Is the SMCJ58A unidirectional or bidirectional, and how is polarity identified?
The SMCJ58A is a unidirectional TVS diode. Polarity is marked by a cathode band on the DO-214AB (SMC) package body - the banded end connects to the protected line (cathode), while the opposite end connects to ground (anode). Bidirectional variants use "CA" suffixes (e.g., SMCJ58CA) and lack polarity marking.
Does the SMCJ58A meet automotive transient immunity standards?
Yes, the SMCJ58A meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling), as confirmed in Taiwan Semiconductor's official documentation. Its 1500W peak power rating and fast <1.0ps response enable compliance without additional filtering components.
What is the maximum steady-state power dissipation (PD) of the SMCJ58A at 25°C ambient?
The SMCJ58A has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C. This value applies only to continuous DC or low-frequency reverse bias conditions - not transient events - and must be derated linearly above 25°C using the specified thermal resistance (RθJA = 55°C/W).
Can the SMCJ58A be used in place of the SMBJ58A in an existing design?
No - the SMCJ58A is not a direct replacement for SMBJ58A due to differing surge ratings: SMCJ58A handles 1500W (16A), while SMBJ58A is rated for 600W (8.3A). Substituting without layout review risks inadequate protection during ISO 7637-2 Pulse 5a events. Use SMCJ58A only where its higher power capability is required and thermally validated.
SMCJ58A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- 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:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 16A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ58A FAQ
1.How can I place an order for SMCJ58A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ58A 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 SMCJ58A reliable?
The price and inventory of SMCJ58A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ58A is usually 5 days.
3.What payment methods are accepted for SMCJ58A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ58A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ58A?
SMCJ58A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ58A 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 SMCJ58A?
For technical support, including SMCJ58A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ58A requirements.
6.How does Aetrix verify that SMCJ58A is sourced from the original manufacturer or authorized distributors?
All SMCJ58A 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 SMCJ58A meets industry standards.
7.What is the process for return or replacement of SMCJ58A?
All SMCJ58A units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ58A, 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 SMCJ58A part is unused and in its original packaging.
Return procedure for SMCJ58A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ58A Tags
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