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Diodes Incorporated SMAJ7.5A-13-F
- Part No.:
- SMAJ7.5A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.5A-13-F.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:8,476
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Product details
Overview
SMAJ7.5A-13-F from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 7.5V reverse standoff voltage (VRWM), 8.33–9.21V breakdown voltage (VBR) at 1.0mA test current, 12.9V max clamping voltage (VC) at 31.0A peak pulse current (IPP), and SMA package with cathode band polarity indicator.
For engineers reviewing the SMAJ7.5A-13-F datasheet, SMAJ7.5A-13-F pinout, SMAJ7.5A-13-F application, or SMAJ7.5A-13-F equivalent, key selection criteria include clamping ratio (VC/VRWM ≈ 1.72), low leakage (<100µA @ 7.5V), fast response time (<1ps), and compatibility with IEC 61000-4-2 Level 4 ESD protection in automotive and industrial power interfaces.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, conducting only when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low leakage across -55°C to +150°C operating range.
The device uses an avalanche breakdown mechanism with defined 8.3ms half-sine surge waveform rating (IFSM = 40A), and its 1.0W steady-state power dissipation at TL = +75°C supports continuous biasing in low-power monitoring circuits without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - Sustains single transient surges per IEC 61000-4-5 (10/1000µs waveform) without degradation. |
| Reverse Standoff Voltage | 7.5V - Maximum continuous DC or RMS voltage before significant leakage; sets minimum system operating margin. |
| Breakdown Voltage | 8.33–9.21V @ 1.0mA - Tight VBR window ensures predictable turn-on timing and minimal overvoltage exposure. |
| Clamping Voltage | 12.9V @ 31.0A - Limits downstream voltage during surge; clamping ratio of 1.72 enables robust IC-level protection. |
| Leakage Current | <100µA @ VRWM - Negligible standby power loss in battery-powered or high-impedance sensing nodes. |
| Package | SMA (DO-214AC) - Standardized surface-mount footprint compatible with automated assembly and IPC-7351B land patterns. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode band marking on unidirectional devices. Weight: 0.064g. Moisture sensitivity level: J-STD-020 Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes conduction path during transient clamp event. |
| Cathode | High-side connection point | Connected to protected line; polarity band identifies terminal for correct orientation in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Ensures stable VBR and leakage performance over temperature and lifetime; eliminates passivation-related drift in harsh environments. |
| 400W peak pulse rating | Supports IEC 61000-4-5 surge immunity up to 4kV (line-to-earth) in 2Ω/12Ω source impedance configurations. |
| Fast response time (<1ps) | Activates before sensitive downstream components (e.g., microcontrollers, CAN transceivers) experience damaging overvoltage. |
| RoHS-compliant & halogen-free | Meets EU RoHS 3 (2015/863/EU) and automotive green material requirements; no bromine <900ppm, chlorine <900ppm, antimony <1000ppm. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: 12V battery-supplied ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping TVS placed upstream of LDOs and microcontrollers to limit voltage to ≤13V during 100V/400ms surges. Use Value: Prevents latch-up and gate oxide damage in 3.3V/5V logic by clamping within 12.9V at 31A, maintaining system uptime under AEC-Q101 stress conditions. |
Use Scenario: 4–20mA current loop transmitters interfacing with PLC analog inputs in factory automation. IC Role / Device Role / Timing Role: Bidirectional protection (using SMAJ7.5CA variant) across signal pair to suppress ESD and induced surges from nearby motor switching. Use Value: Maintains <100µA leakage to avoid calibration drift while surviving ±15kV contact ESD (IEC 61000-4-2) without parameter shift. |
| USB Port ESD Protection | DC-DC Converter Input Stage |
Use Scenario: USB 2.0 data lines (D+/D−) in embedded host controllers requiring Class 4 ESD immunity. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. 100pF @ 0V) placed directly at connector to shunt ESD energy before reaching PHY. Use Value: Clamps ±15kV air/±8kV contact discharge to <12.9V within picoseconds, preserving signal integrity and preventing PHY reset events. |
Use Scenario: 24V input to isolated flyback converter in industrial power supplies subjected to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage clamping device ahead of input filter and rectifier to absorb bulk surge energy before downstream components. Use Value: Handles 400W single-event pulses without failure, reducing need for redundant MOVs and simplifying compliance testing for EN 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A-E3/5A (Vishay) | Same VRWM (7.5V), slightly higher VC (13.4V @ 31A); 10% wider VBR range (8.3–9.6V). | Marginally lower clamping ratio (1.79 vs. 1.72); acceptable where 0.5V extra headroom exists. | Select for dual-source procurement where Vishay's AEC-Q200 qualification is required alongside Diodes' AEC-Q101. |
| P6SMB7.5A (ON Semiconductor) | Identical SMA package and VRWM, but lower PPK (600W), higher IPP (32.7A), and higher VC (13.3V). | Higher surge capacity suits infrequent high-energy events; less optimal for repetitive low-energy transients due to thermal derating profile. | Prefer for legacy designs already using P6SMB series; verify thermal layout compatibility due to differing PM(AV) derating curve. |
Compared with SMAJ7.5A-13-F, SMAJ7.5A-E3/5A offers broader supply chain flexibility with near-identical clamping performance, while P6SMB7.5A trades tighter voltage control for higher single-pulse energy handling-making the Diodes part optimal for space-constrained, thermally sensitive 12V automotive modules.
Availability
SMAJ7.5A-13-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, USB peripheral protection, and DC-DC converter input stages requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ7.5A-13-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
SMAJxxA is part of Diodes' TVS Diode portfolio targeting board-level surge and ESD protection in automotive, industrial, and consumer electronics-designed specifically for high-reliability, surface-mount deployment with AEC-Q101 qualification pathways.
FAQ
Is SMAJ7.5A-13-F suitable for bidirectional signal line protection?
No-SMAJ7.5A-13-F is unidirectional and requires correct polarity installation. For bidirectional protection (e.g., RS-485, USB D+/D−), use SMAJ7.5CA-13-F, which has symmetrical clamping in both directions and no cathode band marking. The "C" suffix explicitly denotes bidirectional configuration per Diodes' ordering nomenclature.
What is the maximum operating temperature for continuous operation?
The device supports continuous operation from –55°C to +150°C junction temperature. At ambient temperatures above +25°C, derating applies: steady-state power dissipation drops linearly from 1.0W at TL = +75°C to zero at +150°C, per Figure 6 in DS19005 Rev. 19-2. Thermal design must maintain lead temperature ≤+75°C for full rated power.
Does SMAJ7.5A-13-F meet AEC-Q101 requirements?
Yes-SMAJ7.5A-13-F is qualified to AEC-Q101 Rev. E for stress testing including HTGB, AC/DC life test, and ESD (HBM ≥8kV, CDM ≥1kV). Full qualification documentation is available upon request from Diodes Incorporated or authorized distributors. Automotive-grade variants (SMAJ7.5AQ) are also available with PPAP support.
How does the clamping voltage change with different peak pulse currents?
Clamping voltage increases nonlinearly with IPP: at 10A, VC ≈ 9.5V; at 20A, VC ≈ 11.6V; at 31A, VC = 12.9V (max). This relationship follows the device's dynamic resistance curve and is validated per IEC 61000-4-5 8/20µs waveform testing. Layout inductance must be minimized to avoid overshoot beyond specified VC.
SMAJ7.5A-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- 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):
- 31A
- Power - Peak Pulse:
- 400W
- 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:
- SMA
SMAJ7.5A-13-F FAQ
1.How can I place an order for SMAJ7.5A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.5A-13-F 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 SMAJ7.5A-13-F reliable?
The price and inventory of SMAJ7.5A-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.5A-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ7.5A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.5A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.5A-13-F?
SMAJ7.5A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.5A-13-F 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 SMAJ7.5A-13-F?
For technical support, including SMAJ7.5A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.5A-13-F requirements.
6.How does Aetrix verify that SMAJ7.5A-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ7.5A-13-F 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 SMAJ7.5A-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ7.5A-13-F?
All SMAJ7.5A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.5A-13-F, 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 SMAJ7.5A-13-F part is unused and in its original packaging.
Return procedure for SMAJ7.5A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.5A-13-F Tags
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