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Taiwan Semiconductor Corporation SMBJ58AH
- Part No.:
- SMBJ58AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ58AH.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,997
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Product details
Overview
SMBJ58AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 600W peak pulse power, 58V working stand-off voltage (VWM), and 93.6V maximum clamping voltage (VC) at 6.7A peak impulse current (IPP). It provides ESD and electrical fast transient protection for automotive power rails and industrial control inputs.
For engineers reviewing the SMBJ58AH datasheet, SMBJ58AH pinout, SMBJ58AH application, or SMBJ58AH equivalent, this device is selected for robust overvoltage immunity in 12V/24V systems where low clamping voltage, AEC-Q101 qualification, and <1μA leakage above 10V are critical design requirements.
Technical Context
The SMBJ58AH employs a glass-passivated silicon junction optimized for fast response (<1.0 ps) to transients per IEC 61000-4-2 and ISO 7637-2 Pulse 1/2a/2b/3a/3b. Its unidirectional configuration enables polarity-sensitive DC rail protection with cathode-band marking.
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, supporting continuous operation up to TJ = 150°C. The device meets J-STD-020 moisture sensitivity level 1 and JESD 201 class 2 whisker resistance.
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 / 71.2 V @ 1 mA - Ensures reliable breakdown activation above normal rail voltage |
| VC @ IPP | 93.6 V @ 6.7 A - Limits downstream voltage stress during 10/1000 µs surge events |
| ID @ VWM | <1 µA - Negligible leakage current preserves low-power system standby integrity |
| PPK | 600 W - Sustains high-energy transients without failure per Fig. 3 waveform |
| TJ max | +150 °C - Enables deployment in under-hood automotive and industrial environments |
| Package | DO-214AA (SMB) - Standardized surface-mount footprint compatible with automated assembly |
Pinout & Package
DO-214AA (SMB) package with cathode band marking on the case; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected circuit node; conducts during forward surge (IFSM = 100 A) |
| Cathode | Ground/Return side | Marked with band; defines unidirectional clamping direction toward GND or low-impedance return path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal stress and humidity |
| Clamping ratio VC/VBR | 1.31 (93.6 V / 71.2 V) - Low ratio minimizes overvoltage exposure to protected ICs |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking preconditioning |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 24V supply lines in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input to clamp surges before regulation stage. Use Value: 93.6V clamping ensures downstream 3.3V/5V regulators remain within absolute maximum ratings during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to field wiring transients. IC Role / Device Role / Timing Role: TVS connected across input terminal and common reference to shunt EFT bursts per IEC 61000-4-4. Use Value: Sub-1µA leakage at 58V prevents false triggering in high-impedance optocoupler input circuits. |
| LED Driver Overvoltage Clamp | DC Motor Controller Gate Protection |
Use Scenario: Shielding constant-current LED driver ICs from back-EMF spikes generated by hot-plug connectors or cable disconnects. IC Role / Device Role / Timing Role: TVS placed across driver output terminals to absorb inductive kickback energy. Use Value: 600W peak power rating handles repetitive 10/1000µs transients without degradation in lighting subsystems. | Use Scenario: Preventing gate oxide damage in MOSFET half-bridges due to Miller-induced voltage spikes during switching. IC Role / Device Role / Timing Role: TVS mounted between gate and source to clamp dv/dt-induced overshoot beyond ±20V absolute maximum. Use Value: Fast <1.0ps response time intercepts nanosecond-scale ringing before gate driver ICs can react. |
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 | Same VWM (58V) and package, but not AEC-Q101 qualified; higher VC = 96.3V @ 6.1A | Not suitable for automotive OEM designs requiring AEC-Q101 certification | Select SMBJ58AH when automotive qualification and lower clamping voltage are mandatory |
| SAC58AH | Same VWM and AEC-Q101 rating, but DO-214AC (SMC) package; 1000W PPK, VC = 93.6V @ 10.7A | Higher power handling requires larger PCB area; better for 48V systems with higher surge energy | Choose SAC58AH only if 1000W surge margin is required and board space permits SMC footprint |
Compared with SMBJ58A and SAC58AH, the SMBJ58AH uniquely balances AEC-Q101 compliance, industry-standard SMB footprint, and lowest clamping voltage (93.6V) in its voltage class-making it optimal for space-constrained 24V automotive modules where thermal derating and layout compatibility are critical.
Availability
SMBJ58AH is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, LED drivers, and DC motor controllers requiring stable component supply with full traceability and lifecycle management.
Supply support for SMBJ58AH 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 MOSFETs for industrial and automotive markets.
The SMBJH series was designed specifically for AEC-Q101-compliant transient suppression in harsh-environment 12V/24V/48V systems, emphasizing low clamping ratio, high surge robustness, and surface-mount manufacturability.
FAQ
What is the maximum clamping voltage of SMBJ58AH and under what test condition is it specified?
The SMBJ58AH has a maximum clamping voltage (VC) of 93.6 V, measured at a peak impulse current (IPP) of 6.7 A using the standardized 10/1000 µs double-exponential surge waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range and reflects worst-case clamping performance during surge events.
Is SMBJ58AH suitable for bidirectional transient protection?
No, SMBJ58AH is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix and confirmed by its single cathode band marking. For bidirectional protection at 58V, the SMBJ58ACH variant must be used - SMBJ58AH only clamps in reverse bias and conducts forward surges up to 100 A.
Does SMBJ58AH meet automotive qualification standards?
Yes, SMBJ58AH is explicitly AEC-Q101 qualified per the manufacturer's documentation, covering stress tests including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock. This certification validates its suitability for under-hood and chassis-mounted automotive applications.
What is the leakage current specification for SMBJ58AH at its working stand-off voltage?
At its rated working stand-off voltage (VWM) of 58 V, the SMBJ58AH exhibits a maximum blocking leakage current (ID) of 1 µA at TA = 25°C. This ultra-low leakage preserves signal integrity and battery life in always-on automotive and industrial monitoring circuits.
How does the SMBJ58AH differ from the standard SMBJ58H in terms of electrical performance?
The SMBJ58AH offers tighter breakdown voltage tolerance (64.4–71.2 V vs. 64.4–78.7 V for SMBJ58H) and lower clamping voltage (93.6 V vs. 103 V), resulting in improved protection margin for sensitive downstream components. Both share identical package, power rating, and AEC-Q101 qualification.
SMBJ58AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- 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):
- 6.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ58AH FAQ
1.How can I place an order for SMBJ58AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ58AH 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 SMBJ58AH reliable?
The price and inventory of SMBJ58AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ58AH is usually 5 days.
3.What payment methods are accepted for SMBJ58AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ58AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ58AH?
SMBJ58AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ58AH 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 SMBJ58AH?
For technical support, including SMBJ58AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ58AH requirements.
6.How does Aetrix verify that SMBJ58AH is sourced from the original manufacturer or authorized distributors?
All SMBJ58AH 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 SMBJ58AH meets industry standards.
7.What is the process for return or replacement of SMBJ58AH?
All SMBJ58AH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ58AH, 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 SMBJ58AH part is unused and in its original packaging.
Return procedure for SMBJ58AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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