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Taiwan Semiconductor Corporation SMBJ75AH
- Part No.:
- SMBJ75AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75AH.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,640
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Product details
Overview
SMBJ75AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 600W peak pulse power, 75V working stand-off voltage (VWM), and 121V maximum clamping voltage (VC@IPP). It delivers fast response (<1.0 ps), low leakage (<1 µA at 75V), and AEC-Q101 qualification for automotive-grade surge protection in power rails and signal lines.
For engineers reviewing the SMBJ75AH datasheet, SMBJ75AH pinout, SMBJ75AH application, or SMBJ75AH equivalent, key selection criteria include clamping performance under 10/1000 µs transients, unidirectional polarity marking, thermal derating above 25°C, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics.
Technical Context
The SMBJ75AH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 83.3–92.1 V breakdown range (VBR @ 1 mA). Its glass-passivated junction ensures stable VBR tolerance and low leakage, while the DO-214AA package supports automated placement and meets JESD201 Class 2 whisker resistance.
It is thermally characterized with RθJC = 10°C/W and RθJA = 55°C/W, enabling reliable operation up to TJ = 150°C. The device sustains 5.2 A peak impulse current (IPP) under 10/1000 µs waveform and exhibits forward voltage of 3.5 V @ 50 A - consistent with SMBJ5.0H–SMBJ90H unidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 83.3 V / 92.1 V @ 1 mA - Ensures precise breakdown threshold with ±5.3% tolerance |
| VC@IPP | 121 V @ 5.2 A - Limits downstream voltage during 10/1000 µs surge to safe levels |
| PPK | 600 W - Peak pulse power handling per single 10/1000 µs transient |
| ID@VWM | <1 µA - Minimal leakage preserves system efficiency in standby or low-power modes |
| TJ max | +150 °C - Enables use in under-hood automotive environments without thermal derating failure |
| Package | DO-214AA (SMB) - Standardized surface-mount footprint compatible with IPC-7351B land patterns |
Pinout & Package
DO-214AA (SMB) package with cathode band marking on one end; two-terminal unidirectional configuration. Matte tin-plated leads meet J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS orientation |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 75V rail); conducts only during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Glass passivated junction | Improves long-term reliability and reduces parameter drift under thermal cycling |
| Clamping ratio (VC/VBR) | ~1.31 - Low ratio ensures tight voltage limiting relative to breakdown threshold |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD-like bursts) |
| Moisture sensitivity level | MSL Level 1 - No floor life limitation; safe for standard SMT reflow without baking |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges before reaching DC-DC converters or microcontrollers. Use Value: Clamps to 121 V within <1.0 ps, preventing damage to downstream 36 V-rated regulators and logic ICs. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to absorb EFT and ESD pulses induced on long cables. Use Value: Sub-1 µA leakage avoids signal offset errors; 121 V clamping protects 24 V tolerant ADC front-ends. |
| LED Driver Overvoltage Protection | Telecom Line Card Surge Suppression |
Use Scenario: Securing constant-current LED drivers in streetlight systems exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Placed across driver output to limit transient voltage spikes caused by inductive kickback or grid switching. Use Value: 600 W peak power rating handles repetitive 10/1000 µs pulses without degradation; DO-214AA enables high-density layout. | Use Scenario: Front-end protection for Ethernet PHY interfaces or RS-485 transceivers in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Unidirectional TVS on VCC rail and data lines to meet IEC 61000-4-4 EFT immunity requirements. Use Value: Meets ISO 7637-2 Pulse 3b (5 ns rise, 50 ns width) with sub-100 ns response; RoHS/halogen-free compliance supports global deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ75A | Same DO-214AC (SMA) package; slightly higher VC = 125 V @ 5.1 A; VBR = 83.3–92.2 V | Lower power rating (400 W); less suitable for sustained automotive load dump | Select SMAJ75A only if space-constrained layouts require smaller SMA footprint and 400 W suffices. |
| Vishay SMF75A | DO-219AB (SOD-123FL) package; 200 W rating; VC = 125 V @ 1.6 A; VBR = 83.3–92.1 V | Not AEC-Q101 qualified; limited to consumer/industrial use; lower IPP capacity | Choose SMF75A for cost-sensitive non-automotive designs where 200 W clamping is adequate. |
Compared with SMAJ75A and SMF75A, the SMBJ75AH offers superior 600 W surge capability, AEC-Q101 qualification, and DO-214AA mechanical robustness-making it the preferred choice for automotive and industrial systems requiring high-reliability transient suppression.
Availability
SMBJ75AH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED driver protection, and telecom line card surge suppression requiring stable component supply and full traceability.
Supply support for SMBJ75AH 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 computing markets.
The SMBJH series was developed to deliver AEC-Q101-compliant, high-power TVS protection in standardized SMB packages for 12 V–170 V systems, emphasizing low clamping ratio, fast response, and robust thermal performance.
FAQ
What is the breakdown voltage range of SMBJ75AH?
The SMBJ75AH has a guaranteed breakdown voltage (VBR) range of 83.3 V to 92.1 V at 1 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures predictable clamping onset and compatibility with 75 V nominal systems. The device's VBR is validated during 100% production testing, and SMBJ75AH maintains this specification across its full operating temperature range of –55°C to +150°C.
Is SMBJ75AH suitable for bidirectional transient protection?
No, SMBJ75AH is a unidirectional TVS diode and must be used with correct polarity-cathode toward the protected line. For bidirectional protection, select SMBJ75CAH (with CAH suffix), which provides symmetrical clamping in both directions. Using SMBJ75AH in reverse-biased configurations outside its specified unidirectional operation risks premature failure or inadequate protection.
Does SMBJ75AH meet automotive qualification standards?
Yes, SMBJ75AH is AEC-Q101 qualified and tested per ISO 7637-2 for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT bursts). Its DO-214AA package passes JESD201 Class 2 whisker testing and MSL Level 1 moisture sensitivity-making SMBJ75AH suitable for under-hood and chassis-mounted automotive applications.
What is the maximum clamping voltage of SMBJ75AH under surge conditions?
The SMBJ75AH clamps to a maximum of 121 V when subjected to a 10/1000 µs surge current of 5.2 A (IPP). This value is measured at TA = 25°C and represents worst-case performance; actual clamping may be lower at reduced ambient temperatures. The 121 V clamping level ensures downstream 36 V–48 V rated ICs remain within safe operating limits during transients.
How does SMBJ75AH compare to standard SMBJ75A in terms of performance?
SMBJ75AH differs from SMBJ75A by its tighter VBR range (83.3–92.1 V vs. 83.3–102 V) and lower clamping voltage (121 V vs. 134 V), resulting in improved protection margin. Both share the same DO-214AA package and 600 W rating, but SMBJ75AH's enhanced parameters make it preferable for high-reliability applications where precise voltage limiting is critical-such as automotive ADAS power domains or precision industrial sensors.
SMBJ75AH 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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 5.2A
- 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)
SMBJ75AH FAQ
1.How can I place an order for SMBJ75AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75AH 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 SMBJ75AH reliable?
The price and inventory of SMBJ75AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75AH is usually 5 days.
3.What payment methods are accepted for SMBJ75AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75AH?
SMBJ75AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75AH 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 SMBJ75AH?
For technical support, including SMBJ75AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75AH requirements.
6.How does Aetrix verify that SMBJ75AH is sourced from the original manufacturer or authorized distributors?
All SMBJ75AH 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 SMBJ75AH meets industry standards.
7.What is the process for return or replacement of SMBJ75AH?
All SMBJ75AH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75AH, 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 SMBJ75AH part is unused and in its original packaging.
Return procedure for SMBJ75AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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