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Diodes Incorporated SMAJ64AQ-13-F
- Part No.:
- SMAJ64AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ64AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:2,512
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Product details
Overview
SMAJ64AQ-13-F from Diodes Incorporated is a unidirectional 400W automotive transient voltage suppressor (TVS) diode with 64V reverse standoff voltage, 103V max clamping voltage at 3.9A peak pulse current, and AEC-Q101 qualification for under-hood electronics protection against ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD events.
For engineers reviewing the SMAJ64AQ-13-F datasheet, SMAJ64AQ-13-F pinout, SMAJ64AQ-13-F application, or SMAJ64AQ-13-F equivalent, key selection criteria include clamping voltage margin relative to system rail, peak pulse current capability under 10×1000μs waveform, unidirectional polarity for DC-biased lines, and IATF 16949 manufacturing traceability.
Technical Context
This TVS operates as a fast-acting shunt clamp on power or signal lines, triggering when transient voltage exceeds 64V VRWM and clamping to ≤103V within nanoseconds. Its glass-passivated junction ensures stable breakdown behavior across -55°C to +175°C operating range.
Designed specifically for automotive 12V/24V systems, it meets ISO7637-2 Pulse 1 (-100V), Pulse 2a (+50V), Pulse 3a (-150V), and Pulse 3b (+100V) surge immunity requirements while maintaining <0.5µA leakage at VRWM - critical for low-power always-on modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 10×1000μs transients without failure in automotive load-dump scenarios |
| Reverse Standoff Voltage | 64V - blocks normal 12V/24V system operation while allowing clamping above this threshold |
| Max Clamping Voltage | 103V @ 3.9A - limits downstream IC stress during ISO7637-2 Pulse 3a (-150V) |
| Breakdown Voltage | 71.1–78.6V @ 1mA - ensures reliable turn-on with defined voltage margin over VRWM |
| Leakage Current | <0.5µA @ 64V - prevents battery drain in always-on vehicle networks (e.g., CAN, LIN) |
| Operating Temp Range | -55°C to +175°C - supports placement near engines, ECUs, and ADAS sensors |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic UL 94V-0 housing with cathode band marking for unidirectional polarity. Moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line; conducts surge current to ground when voltage exceeds VRWM |
| Anode | Reference / return path | Typically tied to system ground or low-impedance return plane for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures stable VBR and low leakage across temperature and lifetime, critical for automotive reliability |
| AEC-Q101 qualified & PPAP capable | Validated for automotive use with full change control, lot traceability, and IATF 16949 manufacturing |
| Lead-free, halogen-free "Green" device | Complies with RoHS 3 and automotive environmental mandates without compromising surge robustness |
| ISO10605 & ISO7637-2 compliance | Pre-validated for 30kV ESD (air/contact) and multi-pulse load-dump immunity per OEM requirements |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting LIN bus transceivers and sensor inputs from battery transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between LIN line and chassis ground, clamping surges before they reach transceiver ESD structures. Use Value: Limits voltage to ≤103V during ISO7637-2 Pulse 3b (+100V), preventing latch-up or gate oxide damage in 5V-tolerant LIN PHYs. | Use Scenario: Safeguarding 5V/3.3V microcontroller I/O and analog sensor interfaces exposed to ignition noise and relay switching spikes. IC Role / Device Role / Timing Role: Localized TVS on each sensor supply line (e.g., MAP, TPS) with direct ground path to minimize inductance. Use Value: Clamps ISO7637-2 Pulse 1 (-100V) to safe levels within 1ns, preserving ADC reference stability and MCU reset integrity. |
| Advanced Driver Assistance Systems (ADAS) | Infotainment Head Unit |
Use Scenario: Shielding camera module power rails and FPD-Link III serial interfaces from ESD and conducted noise in front-end radar/camera harnesses. IC Role / Device Role / Timing Role: TVS on 12V input and serialized video data lines, coordinated with common-mode chokes for differential noise rejection. Use Value: Maintains <0.5µA leakage at 64V VRWM to avoid bias shift in high-gain image sensor analog front-ends during sleep mode. | Use Scenario: Guarding USB-C, HDMI, and audio amplifier inputs against hot-plug ESD and cable discharge events in dashboard-mounted units. IC Role / Device Role / Timing Role: Bidirectional-capable variant (SMAJ64CAQ) used on data lines; unidirectional SMAJ64AQ applied to DC power inputs. Use Value: Delivers 400W peak pulse handling to absorb 30kV contact discharge per ISO10605 without degradation over 1000+ events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A-13-F | No AEC-Q101 qualification; standard industrial grade; same electrical specs | Not approved for automotive production; suitable for non-safety-critical industrial controls | Select only if AEC-Q101 and PPAP documentation are not required |
| SMCJ64A-13-F | Higher 1500W peak power; larger SMC (DO-214AB) package; same VRWM/clamp | Better suited for high-energy load-dump in 24V commercial vehicles; requires more PCB area | Choose when surge energy exceeds 400W but board space allows SMC footprint |
Compared with SMAJ64A-13-F, the AQ version adds automotive qualification and traceability; compared with SMCJ64A-13-F, it trades peak power for compact SMA size - optimal for space-constrained ECU modules needing certified surge protection.
Availability
SMAJ64AQ-13-F is available at Aetrix Electronics and suitable for automotive body electronics, engine management systems, and ADAS sensor interfaces requiring stable component supply with full AEC-Q101 compliance and IATF 16949 traceability.
Supply support for SMAJ64AQ-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 with emphasis on AEC-Q101 and PPAP-ready solutions.
The SMAJ(AQ) series targets automotive power-line and signal-line transient suppression, designed to meet OEM-specific surge immunity standards including ISO7637-2 and ISO10605 without external circuitry.
FAQ
What is the difference between SMAJ64AQ-13-F and SMAJ64CAQ-13-F?
The "C" suffix denotes bi-directional configuration: SMAJ64CAQ-13-F clamps both positive and negative transients symmetrically around 0V, while SMAJ64AQ-13-F is unidirectional and only clamps positive excursions above 64V. The latter is used on DC-biased lines like 12V supplies; the former suits AC-coupled or bidirectional data lines.
Does SMAJ64AQ-13-F require a heatsink for continuous operation?
No heatsink is required. Its 1.0W steady-state power dissipation at TL = +75°C and low thermal resistance (junction-to-lead) enable operation within spec using standard PCB copper pour. Derating curves show >80% pulse power retention up to +125°C ambient, typical for under-hood placements.
Can SMAJ64AQ-13-F be used in 24V commercial vehicle systems?
Yes - its 64V VRWM provides adequate margin above nominal 24V (28V max), and clamping at 103V remains below the 125V absolute maximum rating of most 24V-rated power ICs. It has been validated for ISO7637-2 Pulse 1 (-100V) and Pulse 2a (+50V) in dual-voltage platforms.
How does the glass passivation improve long-term reliability?
Glass passivation protects the PN junction from moisture ingress, ionic contamination, and mechanical stress during thermal cycling. In automotive applications, this prevents parameter drift and premature failure over 15+ year lifetimes - a key reason Diodes specifies it for AEC-Q101 qualification testing.
SMAJ64AQ-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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAJ64AQ-13-F FAQ
1.How can I place an order for SMAJ64AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ64AQ-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 SMAJ64AQ-13-F reliable?
The price and inventory of SMAJ64AQ-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 SMAJ64AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ64AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ64AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ64AQ-13-F?
SMAJ64AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ64AQ-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 SMAJ64AQ-13-F?
For technical support, including SMAJ64AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ64AQ-13-F requirements.
6.How does Aetrix verify that SMAJ64AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ64AQ-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 SMAJ64AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ64AQ-13-F?
All SMAJ64AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ64AQ-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 SMAJ64AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ64AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ64AQ-13-F Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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