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Taiwan Semiconductor Corporation SMBJ64H
- Part No.:
- SMBJ64H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64H.pdf
- Description:
- 600W, 79V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,870
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Product details
Overview
SMBJ64H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection in automotive and industrial power rails. It features a 64 V working stand-off voltage (VWM), 71.1–86.9 V breakdown voltage (VBR), 114 V maximum clamping voltage (VC) at 5.5 A peak pulse current (IPP), and 600 W peak pulse power rating with <1.0 ps response time.
For engineers reviewing the SMBJ64H datasheet, SMBJ64H pinout, SMBJ64H application, or SMBJ64H equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b transients, AEC-Q101 qualification for automotive use, low leakage (<1 µA at 64 V), and compatibility with automated SMT placement on 12 V–48 V DC systems.
Technical Context
The SMBJ64H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (71.1–86.9 V at 1 mA test current). Its glass-passivated junction ensures stable breakdown behavior and low leakage, while the DO-214AA package provides thermal resistance of 10 °C/W (junction-to-case) and 55 °C/W (junction-to-ambient).
It meets ISO 7637-2 immunity requirements for automotive electronics, with clamping action limiting transient-induced voltage to ≤114 V during 10/1000 µs surges up to 5.5 A. The device sustains 100 A non-repetitive forward surge (8.3 ms half-sine) and operates across –55 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping begins; sets system DC rail compatibility (e.g., 48 V nominal bus with margin) |
| VBR min/max | 71.1 / 86.9 V @ 1 mA - Confirmed breakdown threshold range; defines minimum overvoltage level needed to activate protection |
| VC @ IPP | 114 V @ 5.5 A - Clamped voltage during standardized 10/1000 µs surge; determines maximum stress imposed on downstream ICs |
| PPK | 600 W - Peak pulse power handling per single transient; supports robust protection against load dump and inductive switching events |
| ID @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; ensures minimal power loss and signal integrity in always-on circuits |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and high-ambient industrial enclosures |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability; moisture sensitivity level 1 (J-STD-020); weight ≈0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; completes conduction path during reverse-biased clamping |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 48 V supply rail); receives transient energy and initiates avalanche breakdown when exceeded |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, body electronics, and ADAS power domains |
| Glass passivated junction | Ensures consistent VBR tolerance and long-term stability under thermal stress and humidity exposure - critical for field-deployed industrial equipment |
| Fast response time <1.0 ps | Clamps transients before propagation into sensitive analog or digital circuitry - protects CAN transceivers, microcontrollers, and sensor front-ends |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Complies with full suite of automotive electrical disturbance immunity tests - eliminates need for additional external filtering in OEM designs |
| RoHS & halogen-free | Conforms to IEC 61249-2-21 and EU RoHS directives - supports green manufacturing and export compliance for global supply chains |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and alternator ripple in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive-going surges above 64 V. Use Value: Limits peak voltage to 114 V during 600 W transients, preventing damage to 100 V-rated DC-DC converters and MCU power supplies. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers exposed to relay coil flyback and EFT noise. IC Role / Device Role / Timing Role: Standoff protector on field-side inputs, absorbing repetitive 10/1000 µs pulses without degradation. Use Value: Maintains <1 µA leakage at 24 V nominal, ensuring clean logic thresholds while surviving >100,000 surge events per IEC 61000-4-4. |
| LED Driver Overvoltage Clamp | Automotive CAN Bus Power Line Protection |
Use Scenario: Preventing catastrophic failure of constant-current LED drivers subjected to accidental 48 V connection or hot-swap transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on driver input, activated only during fault conditions beyond normal operating range. Use Value: Clamps within 1.0 ps to hold voltage below 114 V, avoiding latch-up or gate oxide rupture in integrated MOSFETs and controllers. |
Use Scenario: Shielding 12 V CAN transceiver power pins from battery transients during ignition or jump-start events. IC Role / Device Role / Timing Role: Secondary-level protection on VCC line upstream of local LDO, complementing primary TVS on data lines. Use Value: Withstands ISO 7637-2 Pulse 2b (inductive switch-off) without derating, preserving CAN communication integrity during harsh vehicle operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ64A | Same DO-214AC (SMA) package; slightly higher VC = 115 V @ 5.5 A; VBR range 71.1–86.9 V matches SMBJ64H exactly. | Lower PPK (400 W vs. 600 W); less suitable for high-energy load dump events in 48 V systems. | Select SMAJ64A only if board space allows larger footprint or if lower surge energy is expected per IEC 61000-4-5 Level 3. |
| Vishay SMF64A | DO-219AB (SOD-123FL) package; 600 W rating; VC = 114 V @ 5.5 A; VBR 71.1–86.9 V; but lower IFSM (30 A vs. 100 A). | Smaller footprint ideal for space-constrained layouts, but limited to lower forward surge capability - unsuitable for high-current inductive loads. | Choose SMF64A for compact consumer or telecom designs where surge energy is limited to <100 A 8.3 ms half-sine. |
Compared with SMAJ64A and SMF64A, SMBJ64H delivers superior 600 W surge capacity and 100 A forward surge rating in the industry-standard DO-214AA (SMB) package - making it the preferred choice for automotive power rail protection where mechanical robustness and high-energy handling are mandatory.
Availability
SMBJ64H is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input conditioning, and LED driver overvoltage protection requiring stable component supply across extended production lifecycles.
Supply support for SMBJ64H 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, with global distribution and AEC-Q101 certification capabilities.
The SMBJH series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and high-reliability glass-passivated junction construction for harsh-environment deployment.
FAQ
What is the clamping voltage of SMBJ64H at its rated peak pulse current?
The SMBJ64H has a maximum clamping voltage (VC) of 114 V when subjected to its rated peak pulse current (IPP) of 5.5 A under the standard 10/1000 µs waveform. This value is measured at TA = 25°C and guarantees that downstream components see no more than 114 V during such transient events. The SMBJ64H maintains this clamping performance across its full operating temperature range, supporting reliable protection in automotive and industrial applications.
Is SMBJ64H suitable for bidirectional transient protection?
No, SMBJ64H is a unidirectional TVS diode intended for protection against positive-going transients on DC power lines. For bidirectional applications - such as AC signal lines or differential buses - the SMBJ64AH variant (with "AH" suffix) must be used, as it is explicitly designed for symmetrical clamping in both polarities. The SMBJ64H lacks reverse-direction breakdown capability and will not protect against negative transients.
Does SMBJ64H meet automotive qualification standards?
Yes, SMBJ64H is AEC-Q101 qualified and fully compliant with ISO 7637-2 test pulses 1, 2a, 2b, 3a, and 3b - confirming its suitability for automotive power network protection. It also passes JESD201 Class 2 whisker testing and meets moisture sensitivity level 1 per J-STD-020, enabling direct use in lead-free reflow processes without baking. These qualifications are documented in Taiwan Semiconductor's official A2102 datasheet revision.
What is the maximum steady-state power dissipation for SMBJ64H?
The SMBJ64H has a steady-state power dissipation (PD) rating of 3 W at TA = 25°C, derated linearly above that ambient temperature per the thermal derating curve in Figure 2 of the datasheet. This rating applies only to continuous DC or low-frequency conditions - not transient events - and reflects safe thermal operation when mounted on standard FR-4 PCB with recommended pad layout. The SMBJ64H relies on its 600 W peak pulse rating for transient handling, not steady-state dissipation.
How does the marking code "NL" correspond to SMBJ64H?
The marking code "NL" is the laser-etched identifier found on the cathode band of every SMBJ64H device, uniquely denoting the 64 V stand-off version within the SMBJH series. This marking is defined in Table 1 of the Taiwan Semiconductor datasheet (Version A2102) and aligns with industry-standard traceability practices. When inspecting physical units or verifying authenticity, "NL" confirms the part is the genuine SMBJ64H - not a generic 64 V TVS or alternate variant like SMBJ64AH ("NM").
SMBJ64H 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:
- 114V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- 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)
SMBJ64H FAQ
1.How can I place an order for SMBJ64H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64H 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 SMBJ64H reliable?
The price and inventory of SMBJ64H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ64H is usually 5 days.
3.What payment methods are accepted for SMBJ64H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64H?
SMBJ64H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64H 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 SMBJ64H?
For technical support, including SMBJ64H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64H requirements.
6.How does Aetrix verify that SMBJ64H is sourced from the original manufacturer or authorized distributors?
All SMBJ64H 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 SMBJ64H meets industry standards.
7.What is the process for return or replacement of SMBJ64H?
All SMBJ64H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64H, 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 SMBJ64H part is unused and in its original packaging.
Return procedure for SMBJ64H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ64H Tags
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