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Taiwan Semiconductor Corporation SMBJ64AH
- Part No.:
- SMBJ64AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64AH.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,035
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Product details
Overview
SMBJ64AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 600W peak pulse power, 64V working stand-off voltage (VWM), and clamps transients to ≤103V at 6.1A peak impulse current. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b surges.
For engineers reviewing the SMBJ64AH datasheet, SMBJ64AH pinout, SMBJ64AH application, or SMBJ64AH equivalent, this device is selected for high-reliability 12–48V DC systems requiring AEC-Q101 qualification, <1μA leakage above 10V, sub-1ps response time, and UL 94V-0 molded compound compliance.
Technical Context
The SMBJ64AH operates as a unidirectional avalanche diode with glass-passivated junction, designed for fast clamping of inductive switching transients and ESD events. Its breakdown voltage is specified at 71.1–78.6V (IT = 1mA), and it maintains ≤1μA blocking leakage at 64V VWM.
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, supporting operation from –55°C to +150°C junction temperature. It meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 71.1 / 78.6 V @ 1 mA - Ensures reliable avalanche conduction onset within tight tolerance |
| VC @ IPP | 103 V @ 6.1 A - Clamping voltage during 10/1000µs surge; limits downstream IC stress |
| PPK | 600 W - Peak pulse power handling per single 10/1000µs transient |
| ID @ VWM | ≤1 µA - Ultra-low leakage preserves system efficiency in always-on circuits |
| TJ max | +150 °C - Enables use in under-hood automotive and high-ambient industrial environments |
| Package | DO-214AA (SMB) - Standardized surface-mount footprint compatible with automated assembly |
Pinout & Package
DO-214AA (SMB) package: cathode-banded unidirectional configuration; matte tin-plated leads; 0.090g mass; UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; defines polarity for unidirectional clamping |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 64V supply); conducts avalanche current during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| Glass passivated junction | Enhances long-term reliability and stability of breakdown voltage under thermal and humidity stress |
| Fast response time <1 ps | Clamps transients before sensitive downstream logic or analog circuitry sustains damage |
| ISO 7637-2 compliance | Withstands standardized automotive load-dump and inductive-switching pulses without degradation |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS directives for environmentally compliant manufacturing |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: 24V battery-supplied ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges before they reach PMICs or microcontrollers. Use Value: Limits transient voltage to ≤103V, preventing latch-up or gate oxide damage in 3.3V/5V logic powered from same rail. | Use Scenario: Digital input modules receiving 24V sensor signals in factory automation cabinets. IC Role / Device Role / Timing Role: Front-end protection element on each channel, absorbing EFT bursts and cable coupling noise. Use Value: Maintains signal integrity by suppressing >1kV EFT pulses while adding <1pF capacitance-no timing skew in 10kHz digital inputs. |
| LED Driver Overvoltage Clamp | Telecom DC Power Interface |
Use Scenario: Constant-current LED drivers in streetlight systems subjected to lightning-induced surges on AC/DC input lines. IC Role / Device Role / Timing Role: Secondary-level TVS across output bus to protect driver ICs and MOSFETs from reflected transients. Use Value: Absorbs 600W pulses without failure, enabling compliance with IEC 61000-4-5 Level 3 (2kV/1kA) testing. | Use Scenario: -48V DC power feed to remote radio units in 5G base stations. IC Role / Device Role / Timing Role: Primary surge suppression on power entry board, upstream of DC-DC converters and monitoring ICs. Use Value: Withstands repeated 10/1000µs surges up to 6.1A while maintaining <1µA leakage-critical for low-power standby modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | Same VWM (64V), but wider VBR range (71.1–86.9V); higher VC = 114V @ 5.5A | Lower surge current rating and higher clamping voltage reduce margin for tight-tolerance 64V systems | Select SMBJ64A only if cost sensitivity outweighs clamping performance; not recommended for AEC-Q101-critical designs |
| SAC64A | Same VWM and package, but lower PPK (400W); VBR 71.1–78.6V; VC = 103V @ 4.1A | Insufficient for ISO 7637-2 Pulse 5a (load dump) where 600W capability is mandatory | Use SAC64A only in non-automotive, low-energy signal-line protection where 400W suffices |
Compared with SMBJ64A and SAC64A, SMBJ64AH delivers superior surge robustness (600W), tighter VBR tolerance (71.1–78.6V), and AEC-Q101 qualification-making it the preferred choice for automotive and industrial 64V rail protection where reliability and clamping precision are critical.
Availability
SMBJ64AH is available at Aetrix Electronics and suitable for automotive control units, industrial PLC I/O modules, LED driver power stages, and telecom DC power interfaces requiring stable component supply across multi-year production cycles.
Supply support for SMBJ64AH 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, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SMBJH series was developed specifically for AEC-Q101-compliant transient suppression in 12–170V DC systems, emphasizing low leakage, tight VBR tolerance, and robust surge endurance in surface-mount form factor.
FAQ
What is the maximum clamping voltage of SMBJ64AH under standard 10/1000µs surge conditions?
The SMBJ64AH has a maximum clamping voltage (VC) of 103 V when subjected to a 6.1 A peak impulse current with a 10/1000µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream components in 64V systems.
Is SMBJ64AH suitable for bidirectional transient protection?
No, SMBJ64AH is a unidirectional TVS diode, indicated by the "AH" suffix and cathode band marking. For bidirectional protection at 64V, the correct part is SMBJ64CAH, which provides symmetrical clamping in both polarities and uses different test conditions per the datasheet.
Does SMBJ64AH meet automotive qualification standards?
Yes, SMBJ64AH is AEC-Q101 qualified and tested per the full stress test schedule, including high-temperature reverse bias (HTRB), temperature cycling, and ESD. It also complies with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electrical disturbance immunity.
What is the leakage current specification for SMBJ64AH at its working stand-off voltage?
At its 64 V working stand-off voltage (VWM), SMBJ64AH exhibits a maximum blocking leakage current (ID) of 1 µA at TA = 25°C. This ultra-low leakage supports energy-efficient designs, especially in always-on automotive modules where quiescent current budgets are strict.
What package type and mounting compatibility does SMBJ64AH use?
SMBJ64AH uses the DO-214AA (SMB) surface-mount package with matte tin-plated leads, fully compatible with J-STD-002 solderability requirements and automated pick-and-place equipment. Its standardized footprint enables drop-in replacement in existing SMB layouts without rework.
SMBJ64AH 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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 6.1A
- 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)
SMBJ64AH FAQ
1.How can I place an order for SMBJ64AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64AH 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 SMBJ64AH reliable?
The price and inventory of SMBJ64AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ64AH is usually 5 days.
3.What payment methods are accepted for SMBJ64AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64AH?
SMBJ64AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64AH 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 SMBJ64AH?
For technical support, including SMBJ64AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64AH requirements.
6.How does Aetrix verify that SMBJ64AH is sourced from the original manufacturer or authorized distributors?
All SMBJ64AH 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 SMBJ64AH meets industry standards.
7.What is the process for return or replacement of SMBJ64AH?
All SMBJ64AH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64AH, 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 SMBJ64AH part is unused and in its original packaging.
Return procedure for SMBJ64AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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