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Taiwan Semiconductor Corporation SMBJ7V5A
- Part No.:
- SMBJ7V5A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7V5A.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,300
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Product details
Overview
SMBJ7V5A from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 7.5V working stand-off voltage (VWM), 8.33–9.21V breakdown voltage (VBR), and 12.9V maximum clamping voltage (VC) at 100A peak pulse current - designed for ESD and electrical fast transient protection in automotive power rails and industrial I/O interfaces.
For engineers reviewing the SMBJ7V5A datasheet, SMBJ7V5A pinout, SMBJ7V5A application, or SMBJ7V5A equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction-to-ambient thermal resistance (55°C/W), moisture sensitivity level (MSL 1), and unidirectional polarity marking for correct PCB orientation.
Technical Context
The SMBJ7V5A operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-1ps response time and low leakage (<1μA at 7.5V). Its single-die DO-214AA construction supports automated placement and meets JESD201 Class 2 whisker resistance.
It delivers 600W non-repetitive peak pulse power (10/1000μs waveform) with thermal derating above 25°C ambient, and exhibits VF = 3.5V at 50A forward surge - consistent with SMBJ5.0–SMBJ90 device family specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 8.33 V / 9.21 V @ 1 mA - Ensures reliable avalanche initiation within tight tolerance band |
| VC @ IPP | 12.9 V @ 100 A - Limits downstream circuit voltage during 10/1000μs transients |
| IPP | 100 A - Peak surge current capability per ISO 7637-2 Pulse 3b test profile |
| PPK | 600 W - Non-repetitive pulse power handling for automotive load dump immunity |
| ID @ VWM | <1 μA - Minimal leakage preserves low-power system standby integrity |
| TJ max | +150 °C - Enables operation in under-hood automotive environments |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking on one end; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance; UL 94V-0 molding compound; weight ≈0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to protected circuit ground or low-side return in unidirectional configuration |
| Cathode | Clamping node | Connected to protected line (e.g., 12V rail); avalanche conduction occurs when line exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics over temperature and lifetime |
| Sub-1 ps response time | Clamps ESD events before sensitive ICs experience overstress |
| ISO 7637-2 compliance | Validated for automotive transients including Pulse 1 (inductive switch-off), Pulse 2b (battery disconnect), and Pulse 3b (capacitive coupling) |
| MSL Level 1 rating | Allows unlimited floor life and reflow without baking preconditioning |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: 12V battery-fed ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and local regulator to clamp transients before they reach LDOs or microcontrollers. Use Value: 12.9V clamping ensures downstream 5V/3.3V regulators remain within absolute maximum ratings during 600W surges. | Use Scenario: PLC digital input modules receiving 24V dry-contact signals in factory automation. IC Role / Device Role / Timing Role: SMBJ7V5A shunts induced EFT bursts on field wiring to chassis ground. Use Value: Sub-1ps response prevents false triggering of optocouplers or Schmitt triggers during 4kV/5kHz EFT testing. |
| LED Driver Overvoltage Clamp | USB Port ESD Suppression |
Use Scenario: Constant-current LED drivers powered from 12V supply with long harness runs. IC Role / Device Role / Timing Role: Placed across driver input terminals to absorb inductive kickback from relay coils or solenoids. Use Value: 100A IPP rating handles repetitive 8.3ms half-sine surges up to 100A without degradation. | Use Scenario: USB 2.0 upstream ports on embedded host controllers exposed to human-body-model ESD. IC Role / Device Role / Timing Role: Unidirectional TVS on VBUS line to prevent overvoltage damage to USB PHY and power switches. Use Value: 7.5V VWM allows normal 4.75–5.25V operation while clamping 8kV contact discharge to ≤12.9V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5A (ON Semiconductor) | Identical VWM (7.5V), VBR (8.33–9.21V), VC (12.9V), and DO-214AA package; same 600W PPK rating | No functional difference; validated for identical ISO 7637-2 pulses and MSL 1 handling | Select based on supply chain availability and qualification status for automotive Tier-1 programs |
| P6SMB7.5A (Littelfuse) | VWM = 7.5V, VBR = 8.3–9.2V, VC = 12.9V, same DO-214AA footprint; 600W rating confirmed per datasheet Rev. G | Same clamping behavior and thermal specs; minor variation in leakage (<1μA vs <0.5μA) has no system impact | Preferred where Littelfuse AEC-Q200-qualified variants are required for automotive production |
Compared with SMBJ7V5A, SMBJ7.5A offers identical electrical and mechanical specifications with cross-manufacturer sourcing flexibility, while P6SMB7.5A provides an AEC-Q200-qualified alternative for mission-critical automotive deployments without layout changes.
Availability
SMBJ7V5A is available at Aetrix Electronics and suitable for automotive electronics, industrial control I/O protection, LED driver overvoltage clamping, and USB port ESD suppression requiring stable component supply and full traceability.
Supply support for SMBJ7V5A 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 industrial and automotive markets.
The SMBJ series was developed specifically for high-reliability transient suppression in harsh environments, emphasizing robust clamping, low leakage, and automated assembly compatibility in DO-214AA packaging.
FAQ
What is the maximum clamping voltage of SMBJ7V5A at its rated peak pulse current?
The SMBJ7V5A has a maximum clamping voltage (VC) of 12.9 V at 100 A peak impulse current (IPP) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain below critical voltage thresholds during standardized surge events such as ISO 7637-2 Pulse 3b. The SMBJ7V5A maintains this clamping performance across its qualified operating temperature range.
Is SMBJ7V5A suitable for bidirectional transient protection?
No, SMBJ7V5A is a unidirectional TVS diode intended only for DC or single-polarity signal lines. For bidirectional protection, Taiwan Semiconductor specifies parts with "C" or "CA" suffixes (e.g., SMBJ7.5CA). Using SMBJ7V5A on AC or bipolar signals risks failure due to forward conduction during negative excursions; always verify polarity marking and circuit topology before deployment of SMBJ7V5A.
What is the junction-to-ambient thermal resistance (RθJA) of SMBJ7V5A?
The SMBJ7V5A has a junction-to-ambient thermal resistance (RθJA) of 55 °C/W when mounted on a standard FR-4 PCB with minimum recommended pad layout per DO-214AA specifications. This value assumes natural convection cooling and defines the temperature rise above ambient per watt of steady-state power dissipation - critical for evaluating thermal margin during repetitive surge events or elevated ambient conditions in automotive under-hood applications.
Does SMBJ7V5A meet automotive transient immunity standards?
Yes, SMBJ7V5A meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a (battery feed interruption), Pulse 2b (alternator field decay), Pulse 3a (capacitive coupled burst), and Pulse 3b (capacitive coupled EFT), as confirmed in Taiwan Semiconductor's SMBJ Series datasheet R2104. Its 600W peak pulse rating and 12.9V clamping enable compliance with these waveforms when applied with appropriate PCB layout and grounding practices.
What is the moisture sensitivity level (MSL) rating for SMBJ7V5A?
SMBJ7V5A is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/60% RH and requires no baking prior to reflow soldering. This eliminates moisture-related popcorning risk during standard lead-free reflow profiles and simplifies manufacturing logistics for high-volume SMT assembly - a key advantage over higher-MSL TVS diodes that demand strict humidity-controlled storage and pre-bake protocols.
SMBJ7V5A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 46.5A
- 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)
SMBJ7V5A FAQ
1.How can I place an order for SMBJ7V5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7V5A 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 SMBJ7V5A reliable?
The price and inventory of SMBJ7V5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7V5A is usually 5 days.
3.What payment methods are accepted for SMBJ7V5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7V5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7V5A?
SMBJ7V5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7V5A 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 SMBJ7V5A?
For technical support, including SMBJ7V5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7V5A requirements.
6.How does Aetrix verify that SMBJ7V5A is sourced from the original manufacturer or authorized distributors?
All SMBJ7V5A 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 SMBJ7V5A meets industry standards.
7.What is the process for return or replacement of SMBJ7V5A?
All SMBJ7V5A units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7V5A, 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 SMBJ7V5A part is unused and in its original packaging.
Return procedure for SMBJ7V5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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