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Diodes Incorporated SMAJ13CAQ-13-F
- Part No.:
- SMAJ13CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13CAQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMA
- Quantity:
- Payment:
- Shipping:
Inventory:2,950
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Product details
Overview
SMAJ13CAQ-13-F from Diodes Incorporated is a bi-directional 400W automotive transient voltage suppressor (TVS) diode with 13V reverse standoff voltage, 21.5V max clamping voltage at 18.6A peak pulse current, and AEC-Q101 qualification for under-hood engine control unit (ECU) power rail protection against ISO7637-2 Pulse 1/2a/3a/3b transients.
For engineers reviewing the SMAJ13CAQ-13-F datasheet, SMAJ13CAQ-13-F pinout, SMAJ13CAQ-13-F application, or SMAJ13CAQ-13-F equivalent, key selection criteria include clamping voltage margin relative to system rail, peak pulse current capability under ISO7637-2 Pulse 3b (+100V), bi-directional surge handling for AC-coupled sensor lines, and IATF 16949 manufacturing traceability.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling protection of differential signal lines (e.g., CAN FD, LIN) and ungrounded DC rails without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior over temperature (-55°C to +175°C operating range) and long-term reliability in high-vibration environments.
Clamping performance is defined per 10×1000μs waveform (IEC 61000-4-5 compliant test profile), with 21.5V VC limiting induced overvoltage during 18.6A transient events. The device sustains 40A non-repetitive forward surge (8.3ms half-sine) and meets ISO10605 ESD immunity (±30kV air/contact discharge).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - Sustains single-event surges up to 400W without failure (per 10×1000μs waveform) |
| Reverse Standoff Voltage | 13V - Blocks normal operation up to 13V DC before entering avalanche conduction |
| Max Clamping Voltage | 21.5V @ 18.6A - Limits transient-induced voltage to ≤21.5V during worst-case ISO7637-2 Pulse 3b event |
| Breakdown Voltage | 14.4–15.9V @ 1mA - Ensures reliable turn-on margin above 13V rail with ±1.5V tolerance |
| Leakage Current | ≤0.5µA @ 13V - Negligible standby power loss in always-on automotive modules |
| Operating Temperature | -55°C to +175°C - Validated for placement near engines, transmissions, and power inverters |
Pinout & Package
Package: SMA (Surface-Mount Axial), molded plastic UL 94V-0 housing, 0.064g weight, cathode band omitted (bi-directional symmetry).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative-going surges (e.g., ISO7637-2 Pulse 1: -100V) |
| Cathode | Transient current entry (positive polarity) | Conducts during positive-going surges (e.g., ISO7637-2 Pulse 2a: +50V) |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of floating or AC-coupled lines (e.g., CAN H/L, sensor bridges) without polarity concerns |
| AEC-Q101 qualification | Validated for automotive under-hood use with HTOL, TC, UHAST, and mechanical shock testing per stress test plan |
| Glass passivated die | Eliminates moisture ingress paths and prevents parameter drift in humid, salt-laden engine bay environments |
| Lead-free & halogen-free | Complies with RoHS 3 (2015/863/EU) and automotive "Green" standards (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Engine Control Unit (ECU) Power Input | CAN FD Transceiver Protection |
|---|---|
Use Scenario: 12V battery-fed ECU main power rail exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converters and microcontrollers. Use Value: Clamps ISO7637-2 Pulse 1 (-100V) to ≤21.5V, preventing damage to 3.3V/5V logic supplies and analog front-ends. | Use Scenario: High-speed CAN FD bus lines (5 Mbps) in ADAS domain controllers subjected to ESD and coupled transients. IC Role / Device Role / Timing Role: Bi-directional line protector on differential CAN H/L pair, preserving signal integrity. Use Value: Symmetric clamping ensures equal voltage limiting on both lines, maintaining common-mode noise rejection during ±30kV ESD events. |
| Body Control Module (BCM) LIN Bus | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Single-wire LIN bus connecting door modules and lighting controls in harsh chassis environments. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on LIN data line referenced to chassis ground. Use Value: Sub-1µA leakage avoids disrupting LIN's 11–29kΩ termination network while clamping ISO7637-2 Pulse 3a (-150V) to safe levels. | Use Scenario: Gate drive supply rail for 3-phase inverter MOSFETs in EPS motor control units. IC Role / Device Role / Timing Role: Secondary surge clamp on isolated 15V gate driver supply, complementing primary input TVS. Use Value: 21.5V clamping protects gate oxide of 20V-rated drivers during inductive kickback from motor phase switching. |
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 |
|---|---|---|---|
| SMAJ13A-13-F | Uni-directional; 13V VRWM, same clamping (21.5V), but only conducts during positive transients | Requires explicit ground reference and polarity-aware layout; unsuitable for floating or differential lines | Select only when protecting grounded DC rails where negative transients are absent or handled separately |
| SMCJ13CA | Higher 1500W rating, DO-214AB package, 21.5V clamping, but larger footprint and 2.5x higher thermal mass | Better suited for high-energy load dump in main battery distribution; less optimal for space-constrained ECUs | Choose when system-level surge energy exceeds 400W or PCB layout allows larger SMC package |
Compared with SMAJ13A-13-F, the bi-directional SMAJ13CAQ-13-F eliminates polarity dependency for differential buses; versus SMCJ13CA, it trades peak power headroom for compact SMA footprint critical in dense automotive control modules.
Availability
SMAJ13CAQ-13-F is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, body control modules, and electric power steering systems requiring stable component supply with full automotive change control and PPAP documentation.
Supply support for SMAJ13CAQ-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and computing markets, with IATF 16949-certified wafer fabs and assembly sites.
The SMAJ series targets AEC-Q101-compliant transient suppression in automotive subsystems, designed specifically to meet ISO7637-2 and ISO10605 requirements without derating for under-hood temperature extremes.
FAQ
What does the 'C' suffix in SMAJ13CAQ-13-F signify?
The 'C' denotes bi-directional configuration, meaning the device provides symmetrical clamping for both positive and negative transients. Unlike uni-directional variants (e.g., SMAJ13AQ-13-F), it has no cathode band and functions identically regardless of voltage polarity applied across its terminals.
How does SMAJ13CAQ-13-F perform under ISO7637-2 Pulse 3b (+100V)?
During ISO7637-2 Pulse 3b (+100V, 50ns rise, 500ns duration), the device clamps the line to ≤21.5V at 18.6A peak current. Its 400W rating ensures single-event survivability, and the 13V standoff guarantees no conduction during nominal 12V operation with typical battery ripple.
Is SMAJ13CAQ-13-F compatible with lead-free reflow soldering processes?
Yes - it features matte tin-plated terminals qualified to MIL-STD-202, Method 208, and supports standard Pb-free reflow profiles (peak 260°C). Moisture sensitivity level is rated at Level 1 per J-STD-020, eliminating bake requirements prior to assembly.
Can SMAJ13CAQ-13-F replace SMAJ13A-13-F in an existing design?
No direct replacement - SMAJ13A-13-F is uni-directional and requires correct anode/cathode orientation. Swapping introduces risk of open-circuit failure during negative transients. Layout redesign, including removal of polarity indicators and verification of floating node compatibility, is mandatory for bi-directional migration.
SMAJ13CAQ-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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- 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
SMAJ13CAQ-13-F FAQ
1.How can I place an order for SMAJ13CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13CAQ-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 SMAJ13CAQ-13-F reliable?
The price and inventory of SMAJ13CAQ-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 SMAJ13CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ13CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13CAQ-13-F?
SMAJ13CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13CAQ-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 SMAJ13CAQ-13-F?
For technical support, including SMAJ13CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13CAQ-13-F requirements.
6.How does Aetrix verify that SMAJ13CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ13CAQ-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 SMAJ13CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ13CAQ-13-F?
All SMAJ13CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13CAQ-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 SMAJ13CAQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ13CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ13CAQ-13-F Tags
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