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Diodes Incorporated SMAJ7.5CAQ-13-F
- Part No.:
- SMAJ7.5CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.5CAQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMA
- Quantity:
- Payment:
- Shipping:
Inventory:3,471
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Product details
Overview
SMAJ7.5CAQ-13-F from Diodes Incorporated is a bi-directional 400W automotive transient voltage suppressor (TVS) diode designed for ISO7637-2 pulse protection and ISO10605 ESD suppression in vehicle power-line and signal-line interfaces. It features a 7.5V reverse standoff voltage (VRWM), 12.9V max clamping voltage at 31.0A peak pulse current (IPP), and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SMAJ7.5CAQ-13-F datasheet, SMAJ7.5CAQ-13-F pinout, SMAJ7.5CAQ-13-F application, or SMAJ7.5CAQ-13-F equivalent, key selection criteria include clamping performance under ISO7637-2 Pulse 1/2a/3a/3b waveforms, bi-directional surge handling capability, and compliance with automotive change control and PPAP requirements.
Technical Context
This bi-directional TVS operates symmetrically across both polarities to clamp transients on unidirectional or bidirectional data/power lines without polarity dependency. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<100 µA at VRWM) over temperature.
The device responds to 10/1000 µs surge waveforms with 12.9V clamping at 31.0A, delivering 400W peak pulse power within an SMA package rated for -55°C to +175°C junction operation - critical for engine control unit (ECU), body control module (BCM), and infotainment power rail protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 10×1000µs surges per ISO7637-2 without failure |
| Reverse Standoff Voltage | 7.5V - defines maximum continuous operating voltage before clamping initiates |
| Max Clamping Voltage | 12.9V @ 31.0A - limits downstream IC voltage stress during worst-case surge events |
| Breakdown Voltage | 8.33–9.21V @ 1.0mA - ensures reliable turn-on margin above VRWM |
| Leakage Current | <100 µA @ 7.5V - minimizes quiescent power loss in always-on automotive circuits |
| Operating Temp Range | -55°C to +175°C - supports placement near high-temperature engine compartments |
Pinout & Package
Package: SMA (Surface Mount Assembly), molded plastic UL 94V-0 housing, 0.064g weight, cathode band omitted (bi-directional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (negative polarity) | Accepts reverse-polarity transients (e.g., ISO7637-2 Pulse 1: -100V) |
| Cathode | Surge current entry (positive polarity) | Accepts positive-polarity transients (e.g., ISO7637-2 Pulse 2a: +50V) |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating lines without polarity constraints |
| AEC-Q101 qualification | Validated reliability for automotive under-hood use including thermal cycling and humidity testing |
| Glass-passivated die | Ensures consistent VBR tolerance and long-term stability under repeated surge stress |
| Lead-free & halogen-free | Meets RoHS 3 and automotive green material requirements (Br+Cl <1500ppm, Sb <1000ppm) |
Applications
| Engine Control Unit (ECU) Power Input | Automotive CAN Bus Lines |
|---|---|
Use Scenario: Protects 5V/12V supply rails in engine control modules against load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power input, placed upstream of DC-DC converters and microcontrollers. Use Value: Limits voltage excursions to ≤12.9V during ISO7637-2 Pulse 1 (-100V) and Pulse 3a (-150V), preventing latch-up or burnout of downstream PMICs. | Use Scenario: Shields high-speed CAN FD transceivers from ESD events and coupled transients on differential bus lines. IC Role / Device Role / Timing Role: Bi-directional line protector between connector and transceiver, co-located with common-mode chokes. Use Value: Clamps ±30kV contact discharge (ISO10605) while maintaining <100 µA leakage to avoid bus bias shift or false dominant states. |
| Body Control Module (BCM) LIN Bus | Infotainment System USB/AV Interface |
Use Scenario: Secures single-wire LIN communication lines exposed to battery transients in door modules and seat controllers. IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS placed directly at connector interface. Use Value: Delivers 12.9V clamping at 31A without degrading LIN signal integrity (no added capacitance beyond intrinsic junction value). | Use Scenario: Guards auxiliary video/audio inputs (e.g., HDMI, analog AV) in head units against hot-plug ESD and cable discharge. IC Role / Device Role / Timing Role: Secondary-level surge absorber after primary board-level filtering. Use Value: Survives repeated 30kV air discharge events while maintaining signal fidelity due to fast response time (<1 ns) and low dynamic impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A-13-F | Uni-directional; lacks negative-polarity clamping capability | Requires external polarity management; unsuitable for floating or AC-coupled lines | Select only when protecting DC-biased unidirectional signals with known polarity |
| TPSM8-7.5 | Same VRWM and clamping but in SOD-123FL package; lower IFSM (30A vs. 40A) | Lower surge robustness; not rated for ISO7637-2 Pulse 1 (-100V) at full severity | Prefer for space-constrained layouts where peak surge exposure is limited to Pulse 2a/3b |
Compared with SMAJ7.5A-13-F and TPSM8-7.5, SMAJ7.5CAQ-13-F uniquely provides symmetrical 40A surge handling and full ISO7637-2 compliance in the industry-standard SMA footprint - essential for safety-critical power-line protection where polarity cannot be assumed.
Availability
SMAJ7.5CAQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, infotainment systems, and automotive sensor interfaces requiring stable component supply with AEC-Q101 traceability and PPAP documentation support.
Supply support for SMAJ7.5CAQ-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, specializing in high-reliability components for automotive, industrial, and computing markets.
The SMAJ series is part of Diodes' automotive-grade TVS portfolio, engineered specifically to meet stringent ISO7637-2 and ISO10605 requirements for electronic control units and networked vehicle subsystems.
FAQ
What does the 'C' suffix in SMAJ7.5CAQ-13-F indicate?
The 'C' denotes bi-directional functionality - meaning the device clamps transients of either polarity symmetrically. Unlike uni-directional variants (e.g., SMAJ7.5AQ-13-F), it has no cathode band marking and protects AC-coupled or floating lines without polarity constraints, making it ideal for CAN, LIN, and sensor signal lines.
Is SMAJ7.5CAQ-13-F qualified for under-hood automotive use?
Yes - it is AEC-Q101 qualified, manufactured in IATF 16949 certified facilities, and rated for junction temperatures from -55°C to +175°C. Its glass-passivated die and lead-free, halogen-free construction meet automotive change control and PPAP requirements for engine bay deployment.
How does its clamping performance compare to ISO7637-2 test pulses?
At 12.9V clamping voltage and 31.0A peak current, it fully satisfies ISO7637-2 Pulse 1 (-100V), Pulse 2a (+50V), Pulse 3a (-150V), and Pulse 3b (+100V) requirements. Its 400W peak power rating ensures no thermal runaway during standardized 10×1000µs surge waveforms.
Can SMAJ7.5CAQ-13-F replace SMAJ7.5A-13-F in existing designs?
No - SMAJ7.5A-13-F is uni-directional and will not protect against negative-polarity transients. Substitution requires layout review: bi-directional operation eliminates need for polarity-aware routing but demands verification that downstream circuitry tolerates symmetrical clamping behavior on both signal polarities.
SMAJ7.5CAQ-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:
- -
- Bidirectional Channels:
- 1
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAJ7.5CAQ-13-F FAQ
1.How can I place an order for SMAJ7.5CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.5CAQ-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 SMAJ7.5CAQ-13-F reliable?
The price and inventory of SMAJ7.5CAQ-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 SMAJ7.5CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ7.5CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.5CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.5CAQ-13-F?
SMAJ7.5CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.5CAQ-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 SMAJ7.5CAQ-13-F?
For technical support, including SMAJ7.5CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.5CAQ-13-F requirements.
6.How does Aetrix verify that SMAJ7.5CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ7.5CAQ-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 SMAJ7.5CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ7.5CAQ-13-F?
All SMAJ7.5CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.5CAQ-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 SMAJ7.5CAQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ7.5CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.5CAQ-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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