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Taiwan Semiconductor Corporation SMBJ58CA
- Part No.:
- SMBJ58CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ58CA.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,380
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Product details
Overview
SMBJ58CA from Taiwan Semiconductor is a bidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy ESD and surge protection in automotive and industrial power rails. It features a 58V working stand-off voltage (VWM), 64.4–78.7V breakdown voltage (VBR), 103V maximum clamping voltage (VC) at 6.1A peak impulse current (IPP), and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity standards.
For engineers reviewing the SMBJ58CA datasheet, SMBJ58CA pinout, SMBJ58CA application, or SMBJ58CA equivalent, this page delivers verified electrical parameters, bidirectional TVS behavior, thermal resistance (RθJA = 55°C/W), moisture sensitivity level (MSL 1), and real-world use cases in lighting systems, inductive load switching, and EFT-immunity-critical IC interfaces.
Technical Context
The SMBJ58CA operates as a bidirectional avalanche diode with symmetrical clamping in both polarities, enabling robust protection against reverse- and forward-polarity transients without polarity dependency. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1 µA at 58V), while fast response time (<1.0 ps) guarantees sub-nanosecond suppression of ESD events.
Thermally, it supports continuous operation up to +150°C junction temperature with RθJC = 10°C/W and RθJA = 55°C/W, and is rated for non-repetitive 600W peak pulse power (10/1000 µs waveform). Its DO-214AA package provides mechanical robustness and UL 94V-0 flammability compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous DC or RMS voltage the device blocks without conduction. |
| VBR min/max | 64.4 V / 78.7 V @ IT = 1 mA - Confirmed avalanche onset range ensuring reliable turn-on before system damage. |
| VC @ IPP | 103 V @ 6.1 A - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by protected circuit. |
| PPK | 600 W - Peak pulse power handling capacity per single 10/1000 µs transient event. |
| ID @ VWM | <1 µA - Ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max | +150 °C - Enables deployment in under-hood automotive or high-temperature industrial environments. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.090 g mass and matte tin-plated leads per J-STD-002. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; bidirectional symmetry means no anode/cathode distinction-both terminals function identically under reverse or forward surge conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bidirectional surge port | Accepts transient energy from either polarity; connects directly to protected line (e.g., CAN_H or power rail). |
| Terminal 2 | Bidirectional surge port | Completes low-inductance path to ground or return plane; symmetric layout eliminates orientation dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or differential buses (e.g., RS-485, CAN) without polarity concerns. |
| ISO 7637-2 compliance | Validated performance against automotive load-dump and inductive-switching pulses (Pulse 1, 2a, 2b, 3a, 3b). |
| MSL Level 1 | Zero floor-life limitation-supports unlimited exposure to ambient conditions prior to reflow soldering. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives for environmentally constrained industrial and automotive supply chains. |
| Fast response & low capacitance | <1.0 ps turn-on and ~100 pF typical junction capacitance at 0 V enable protection of high-speed data lines without signal distortion. |
Applications
| Automotive Power Rail Protection | Industrial Lighting Surge Suppression |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed between power rail and chassis ground to clamp surges up to ±103 V. Use Value: Prevents latch-up or permanent damage to microcontrollers and power management ICs during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding LED driver ICs in streetlight controllers exposed to lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Mounted across bridge rectifier output to absorb repetitive 600 W transients without degradation. Use Value: Extends system lifetime by limiting peak voltage to 103 V during 10/1000 µs surges, well below driver IC breakdown thresholds. |
| RS-485 Transceiver Interface Protection | Inductive Load Switching Protection |
Use Scenario: Shielding half-duplex RS-485 transceivers (e.g., THVD1550) in factory automation networks from EFT and cable discharge events. IC Role / Device Role / Timing Role: Connected line-to-line (A–B) and line-to-ground to suppress common-mode and differential-mode transients simultaneously. Use Value: Maintains data integrity by clamping fast EFT bursts (<1 ns rise) before they disrupt receiver thresholds or damage I/O structures. |
Use Scenario: Protecting MOSFET gate drivers and logic ICs controlling solenoids, relays, or motors in PLC output modules. IC Role / Device Role / Timing Role: Placed across inductive coil terminals to suppress flyback voltages exceeding 103 V during turn-off. Use Value: Eliminates need for snubber RC networks by absorbing 600 W energy in <100 ns, reducing BOM count and board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58CA-TP from Microchip | Identical VWM (58 V), VBR (64.4–78.7 V), and VC (103 V); same DO-214AA package but MSL Level 2 (vs. Level 1). | Requires dry-pack storage and controlled floor life; unsuitable for long-term warehouse staging without humidity control. | Select when sourcing from Microchip-authorized channels and humidity-controlled assembly is available. |
| P6SMB58CA from ON Semiconductor | Same electrical specs (VWM = 58 V, VC = 103 V), but higher typical leakage (≤5 µA vs. ≤1 µA) and RθJA = 60°C/W (vs. 55°C/W). | Marginally reduced thermal margin in sealed enclosures; acceptable for lower ambient temperature deployments. | Prefer for legacy designs already qualified with P6SMB series or where leakage tolerance >1 µA is acceptable. |
Compared with SMBJ58CA, the Microchip SMBJ58CA-TP offers identical surge performance but demands stricter moisture handling, while the ON Semiconductor P6SMB58CA trades slightly higher leakage and thermal resistance for broad second-source availability and mature qualification history.
Availability
SMBJ58CA is available at Aetrix Electronics and suitable for automotive ECU protection, industrial lighting surge suppression, RS-485 interface hardening, and inductive load switching requiring stable component supply and full traceability.
Supply support for SMBJ58CA 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, serving global automotive, industrial, and consumer markets since 1979.
The SMBJ Series was developed specifically for high-reliability transient suppression in harsh environments, emphasizing ISO 7637-2 compliance, MSL Level 1 robustness, and tight VBR tolerances for predictable clamping behavior.
FAQ
What does the 'CA' suffix indicate in SMBJ58CA?
The 'CA' suffix denotes a bidirectional configuration: SMBJ58CA clamps transients of either polarity symmetrically, unlike unidirectional variants (e.g., SMBJ58A) that only protect against reverse-voltage surges. This makes SMBJ58CA ideal for AC-coupled or differential signal lines where polarity reversal is possible, such as CAN bus or RS-485 interfaces.
Is SMBJ58CA suitable for protecting a 48 V DC power rail?
No - SMBJ58CA has a 58 V working stand-off voltage (VWM), leaving only 10 V margin above 48 V nominal, which risks premature conduction due to ripple, tolerance stack-up, or temperature drift. For 48 V systems, SMBJ64CA (VWM = 64 V) or SMBJ70CA (VWM = 70 V) provide safer operating margins while maintaining compatible clamping performance.
Does SMBJ58CA require a heatsink for 600 W pulse handling?
No - the 600 W rating applies to non-repetitive 10/1000 µs pulses; SMBJ58CA dissipates negligible average power during transient events. Its RθJA = 55°C/W is sufficient for PCB copper pour-based thermal management. Heatsinks are unnecessary unless subjected to frequent repetitive surges exceeding derating curves in Figure 2 of the datasheet.
How does SMBJ58CA compare to SMAJ58CA in terms of surge capability?
SMBJ58CA delivers 600 W peak pulse power, whereas SMAJ58CA is rated for 400 W - a 50% higher surge capacity. This difference stems from the larger DO-214AA (SMB) package of SMBJ58CA versus the smaller DO-214AC (SMA) of SMAJ58CA, enabling greater thermal mass and current spreading. Use SMBJ58CA where higher energy transients (e.g., ISO 7637-2 Pulse 5a) are expected.
Can SMBJ58CA be used in place of SMBJ58A in a unidirectional design?
Yes - SMBJ58CA functions identically to SMBJ58A under forward-biased conditions and provides identical clamping in the reverse direction. However, its bidirectional symmetry introduces no penalty in unidirectional applications; the only trade-off is slightly higher cost due to dual-junction construction. No PCB changes or layout modifications are required for substitution.
SMBJ58CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
SMBJ58CA FAQ
1.How can I place an order for SMBJ58CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ58CA 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 SMBJ58CA reliable?
The price and inventory of SMBJ58CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ58CA is usually 5 days.
3.What payment methods are accepted for SMBJ58CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ58CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ58CA?
SMBJ58CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ58CA 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 SMBJ58CA?
For technical support, including SMBJ58CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ58CA requirements.
6.How does Aetrix verify that SMBJ58CA is sourced from the original manufacturer or authorized distributors?
All SMBJ58CA 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 SMBJ58CA meets industry standards.
7.What is the process for return or replacement of SMBJ58CA?
All SMBJ58CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ58CA, 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 SMBJ58CA part is unused and in its original packaging.
Return procedure for SMBJ58CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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