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Diodes Incorporated SMBJ14AQ-13-F
- Part No.:
- SMBJ14AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14AQ-13-F.pdf
- Description:
- TVS DIODE 14VWM 23.2VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:2,645
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Product details
Overview
SMBJ14AQ-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode designed for automotive circuit protection. It features a 14.0V reverse standoff voltage (VRWM), 15.6–17.2V breakdown voltage (VBR), 23.2V max clamping voltage (VC) at 25.8A peak pulse current, and AEC-Q101 qualification for under-hood applications such as engine control units and body electronics.
For engineers reviewing the SMBJ14AQ-13-F datasheet, SMBJ14AQ-13-F pinout, SMBJ14AQ-13-F application, or SMBJ14AQ-13-F equivalent, key selection criteria include ISO7637-2 Pulse 1/2a/3a/3b surge immunity, ISO10605 ESD robustness (±30kV), clamping ratio (VC/VRWM ≈ 1.66), and SMB package thermal performance in high-reliability automotive environments.
Technical Context
This TVS diode operates as a unidirectional clamping device, conducting only during negative transients relative to its anode-cathode polarity. Its 600W peak pulse power rating is defined per 10×1000μs waveform, with 4.8W/°C derating above +25°C ambient and 5.0W steady-state dissipation at TL = +75°C.
It meets stringent automotive requirements: AEC-Q101 qualified, PPAP capable, manufactured in IATF 16949 certified facilities, and compliant with ISO10605 (±30kV air/contact discharge) and ISO7637-2 (Pulse 1: −150V; Pulse 2a: +112V; Pulse 3a: −220V; Pulse 3b: +150V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 10×1000μs surges without failure in automotive load-dump scenarios |
| Reverse Standoff Voltage (VRWM) | 14.0V - blocks normal 12V/24V system voltages while remaining inactive below clamp threshold |
| Clamping Voltage (VC) | 23.2V @ IPP = 25.8A - limits downstream IC voltage to safe level during ISO7637-2 Pulse 1 (−150V) |
| Breakdown Voltage (VBR) | 15.6–17.2V @ IT = 1.0mA - ensures reliable turn-on before VC exceeds protected circuit's absolute maximum rating |
| Leakage Current (IR) | <0.5µA @ VRWM - negligible standby power loss and no signal integrity impact in always-on automotive modules |
| Operating Temperature | −55°C to +175°C - supports placement near engines, transmissions, and other high-temperature zones |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic (UL 94V-0), 0.1g weight, moisture sensitivity level 1 (J-STD-020). Cathode band denotes polarity on unidirectional variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance chassis return; carries full surge current during clamping |
| Cathode | Protected line input | Connected to supply rail (e.g., battery feed); voltage referenced to Anode during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade qualification | AEC-Q101 qualified, PPAP capable, IATF 16949 manufacturing - enables direct use in safety-critical Tier 1 BOMs without requalification |
| ISO-compliant surge handling | Validated against ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ±30kV - eliminates need for external test validation in automotive design reviews |
| Low clamping ratio | VC/VRWM = 1.66 - minimizes voltage overshoot margin required for protected MCU/ASIC VDD pins |
| Green construction | Halogen- and antimony-free, RoHS 3 compliant (<900ppm Br/Cl, <1000ppm Sb) - satisfies EU ELV and OEM sustainability mandates |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Lines |
|---|---|
Use Scenario: Protects 12V supply rail of gasoline/diesel engine ECUs against load dump (ISO7637-2 Pulse 5a) and alternator ripple-induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and DC-DC converter input, clamping negative-going spikes within 1ns response time. Use Value: Prevents latch-up or gate oxide damage in buck controller ICs by limiting voltage to ≤23.2V during −150V Pulse 1 events. | Use Scenario: Shields high-speed CAN FD transceivers (e.g., TJA1044) on BCM rear lighting and door module networks from ESD and coupled surges. IC Role / Device Role / Timing Role: Bi-directional protection not applicable; SMBJ14AQ-13-F used on VCC rail only - cathode tied to 12V, anode to chassis ground. Use Value: Maintains CAN common-mode range integrity by preventing VCC sag or collapse during ±30kV contact discharge per ISO10605. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Secures 12V input of image sensor SoCs (e.g., Sony IMX series) in front-facing ADAS cameras exposed to ignition noise and jump-start transients. IC Role / Device Role / Timing Role: Primary rail clamp upstream of LDO regulators; activated within nanoseconds during fast-rising transients from nearby solenoid switching. Use Value: Ensures uninterrupted pixel clocking and analog front-end biasing by holding VDD ≥14.0V and ≤23.2V across temperature extremes (−40°C to +125°C junction). | Use Scenario: Guards gate driver IC supply (e.g., DRV8305) in EPS motor control boards against inductive kickback from H-bridge MOSFET switching. IC Role / Device Role / Timing Role: Unidirectional TVS on 12V auxiliary rail feeding bootstrap circuitry; conducts only during negative excursions caused by flyback energy. Use Value: Avoids false shutdown triggers in motor drivers by limiting undershoot to >−0.7V (VF = 3.5V forward drop irrelevant here; clamping dominates). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14A-Q | Same electrical specs; differs only in packaging - bulk vs. tape-and-reel (SMBJ14AQ-13-F = 3,000 pcs/reel) | No functional difference; suitable for same PCB layouts and reflow profiles | Select SMBJ14AQ-13-F for automated SMT production; SMBJ14A-Q for prototyping or low-volume hand assembly |
| SMCJ14A | Higher 1500W PPK rating, larger SMC package (DO-214AB), 2.5× footprint area, 1.5× thermal mass | Used where higher surge margin is required (e.g., alternator output lines), but incompatible with SMB footprints | Choose only if board redesign allows SMC pad layout; not a drop-in replacement due to mechanical mismatch |
Compared with SMBJ14AQ-13-F, SMBJ14A-Q offers identical protection performance with different logistics packaging, while SMCJ14A provides greater surge capacity at the cost of PCB area and thermal interface compatibility - making SMBJ14AQ-13-F optimal for space-constrained, high-volume automotive modules requiring AEC-Q101 compliance.
Availability
SMBJ14AQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering designs requiring stable component supply across extended automotive product lifecycles.
Supply support for SMBJ14AQ-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 centers across Asia and manufacturing in IATF 16949-certified facilities.
The SMBJ series belongs to Diodes' automotive-grade TVS portfolio, engineered specifically to meet ISO7637-2 and ISO10605 requirements for electronic control units in passenger vehicles and commercial trucks.
FAQ
What is the maximum clamping voltage of SMBJ14AQ-13-F at rated peak pulse current?
The maximum clamping voltage (VC) is 23.2V when subjected to a 10×1000μs transient waveform at 25.8A peak pulse current (IPP), measured per REA standard. This value is guaranteed across the full operating temperature range (−55°C to +175°C) and defines the upper voltage limit imposed on protected circuits during surge events.
Is SMBJ14AQ-13-F suitable for bidirectional signal line protection?
No - SMBJ14AQ-13-F is a unidirectional TVS diode, indicated by the absence of "C" in its part number. It conducts only for reverse-biased transients (cathode positive relative to anode). For bidirectional protection (e.g., data lines), the bi-directional variant SMBJ14CAQ-13-F must be used, which has symmetrical clamping in both polarities.
How does the SMBJ14AQ-13-F respond to repeated surge events?
It is rated for non-repetitive pulses only: maximum 4 pulses per minute at 8.3ms half-sine waveform. Repeated surges exceeding this duty cycle cause thermal accumulation beyond PM(AV) = 5.0W at TL = +75°C, risking parametric shift or catastrophic failure. System-level design must include current limiting or thermal management for repetitive threat profiles.
Does SMBJ14AQ-13-F require derating at elevated ambient temperatures?
Yes - peak pulse power derates linearly at 4.8W/°C above +25°C ambient, per Figure 6 in DS40740 Rev. 15-2. At +85°C ambient, usable PPK drops to 312W (600W − 4.8W × 60°C). Designers must apply this derating when placing the device near heat sources like power MOSFETs or DC-DC inductors in engine bay applications.
SMBJ14AQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 25.8A
- Power - Peak Pulse:
- 600W
- 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:
- SMB
SMBJ14AQ-13-F FAQ
1.How can I place an order for SMBJ14AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14AQ-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 SMBJ14AQ-13-F reliable?
The price and inventory of SMBJ14AQ-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 SMBJ14AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ14AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14AQ-13-F?
SMBJ14AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14AQ-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 SMBJ14AQ-13-F?
For technical support, including SMBJ14AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14AQ-13-F requirements.
6.How does Aetrix verify that SMBJ14AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ14AQ-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 SMBJ14AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ14AQ-13-F?
All SMBJ14AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14AQ-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 SMBJ14AQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ14AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14AQ-13-F Tags
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