My Inquiry
My Account
Diodes Incorporated SMBJ12CAQ-13-F
- Part No.:
- SMBJ12CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ12CAQ-13-F.pdf
- Description:
- TVS DIODE 12VWM 19.9VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:8,492
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ12CAQ-13-F from Diodes Incorporated is a bi-directional 600W surface-mount transient voltage suppressor (TVS) designed for automotive power-line and signal-line surge protection. It features a 12V reverse standoff voltage (VRWM), 19.9V clamping voltage (VC) at 30.2A peak pulse current, and AEC-Q101 qualification - deployed in engine control units (ECUs) to withstand ISO7637-2 Pulse 1 (–150V) and ISO10605 ESD (±30kV).
For engineers reviewing the SMBJ12CAQ-13-F datasheet, SMBJ12CAQ-13-F pinout, SMBJ12CAQ-13-F application, or SMBJ12CAQ-13-F equivalent, this page delivers verified electrical specs, automotive compliance evidence, package dimensions, clamping behavior under 10/1000μs transients, and direct alternatives with documented voltage and power dissipation differences.
Technical Context
This bi-directional TVS diode operates symmetrically across both polarities, enabling robust protection of bidirectional data lines (e.g., LIN bus, CAN FD stubs) and ungrounded power rails without polarity dependency. Its 19.9V clamping voltage ensures downstream 12V-rated ICs remain below absolute maximum ratings during ISO7637-2 Pulse 3b (+150V) events.
Rated for –55°C to +175°C junction temperature and packaged in SMB with IATF 16949-certified manufacturing, it sustains operation in under-hood environments. The 600W peak pulse power (10×1000μs waveform) and 100A non-repetitive surge capability meet stringent automotive load-dump immunity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 10×1000μs transients per ISO7637-2 without failure |
| Reverse Standoff Voltage (VRWM) | 12.0V - blocks normal 12V automotive system voltage while remaining inactive |
| Clamping Voltage (VC) | 19.9V @ IPP = 30.2A - limits voltage seen by protected circuit during surge |
| Breakdown Voltage (VBR) | 13.3V min / 14.7V max @ IT = 1.0mA - defines precise turn-on threshold |
| Leakage Current (IR) | 0.5µA max @ VRWM - negligible standby power loss in always-on modules |
| AEC-Q101 Qualified | Yes - validated for automotive use with PPAP capability and change control |
| Package | SMB - surface-mount footprint compatible with automated SMT assembly and thermal relief pads |
Pinout & Package
Two-terminal device in SMB package: Cathode and Anode terminals are symmetrical for bi-directional operation; no polarity marking on body. Package dimensions: 3.30–3.94mm length × 5.00–5.59mm width × 2.00–2.50mm height (A), with 1.96–2.21mm lead width (b) and 0.76–1.52mm terminal length (L).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during positive transients | Connects to line being protected; forms low-impedance path to ground when VC exceeded |
| Cathode | Current entry point during negative transients | Connects to line being protected; identical function to Anode due to bi-directional symmetry |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of floating or AC-coupled lines (e.g., LIN, sensor bridges) without polarity concerns |
| 600W peak pulse rating | Meets ISO7637-2 Pulse 1 (–150V), Pulse 2a (+112V), and Pulse 3b (+150V) without derating |
| 19.9V clamping at 30.2A | Keeps protected 12V logic interfaces (e.g., MCU GPIO, CAN transceivers) within safe operating area during surges |
| AEC-Q101 qualification | Validated for automotive under-hood deployment with guaranteed reliability over full temperature range (–55°C to +175°C) |
| RoHS 3 & Halogen-free | Complies with EU Directive 2015/863/EU and Diodes' "Green" definition (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Engine Control Unit (ECU) Power Input | LIN Bus Transceiver Protection |
|---|---|
|
Use Scenario: 12V battery feed to ECU main power rail subjected to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp absorbing ISO7637-2 Pulse 1 (–150V) and Pulse 3b (+150V) energy before it reaches DC/DC converters. Use Value: Prevents catastrophic failure of 12V-to-5V/3.3V regulators by limiting input voltage to ≤19.9V during transients. |
Use Scenario: LIN physical layer interface exposed to ESD events and coupled noise from adjacent high-current wiring. IC Role / Device Role / Timing Role: Bi-directional shunt protector placed between LIN line and ground, responding within nanoseconds to ±30kV contact discharge (ISO10605). Use Value: Maintains LIN signal integrity by clamping transients below transceiver's absolute maximum rating (typically ±40V), avoiding bus lockup. |
| Body Control Module (BCM) Door Actuator Driver | Automotive Camera Power Line |
|
Use Scenario: H-bridge motor driver outputs powering window lifters or mirror actuators, subject to inductive kickback. IC Role / Device Role / Timing Role: Bidirectional snubber suppressing flyback voltages generated during MOSFET turn-off, referenced to chassis ground. Use Value: Eliminates need for separate uni-directional TVS pairs; clamps both positive and negative spikes to ≤19.9V, protecting gate drivers. |
Use Scenario: 12V supply line to rear-view camera module routed near ignition systems and ABS solenoids. IC Role / Device Role / Timing Role: Secondary surge limiter downstream of primary fuse and LC filter, handling residual ISO7637-2 Pulse 2a (+112V) energy. Use Value: Ensures camera SoC remains powered and functional during cranking transients, preventing video dropout or reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA | Same electrical specs but lacks AEC-Q101 qualification and PPAP support | Restricted to non-automotive industrial or consumer designs | Select only if automotive change control and IATF 16949 traceability are not required |
| SMCJ12CAQ-13-F | Same AEC-Q101 rating but in larger SMC package (higher 1500W PPK, 200A IFSM) | Better suited for high-energy zones like alternator output or starter circuits | Choose when surge energy exceeds 600W or board layout allows larger footprint |
Compared with SMBJ12CA and SMCJ12CAQ-13-F, the SMBJ12CAQ-13-F uniquely balances AEC-Q101 compliance, 600W surge capacity, and SMB footprint - making it optimal for space-constrained automotive modules where full qualification and moderate energy handling are both mandatory.
Availability
SMBJ12CAQ-13-F is available at Aetrix Electronics and suitable for engine control units, LIN bus nodes, body control modules, and automotive camera power supplies requiring stable component supply across extended temperature ranges and automotive-grade lifecycle assurance.
Supply support for SMBJ12CAQ-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.
This device belongs to Diodes' AEC-Q101-qualified SMBJ Automotive TVS family, engineered specifically to meet ISO7637-2 and ISO10605 surge/ESD immunity requirements in harsh vehicle environments.
FAQ
What does the 'C' in SMBJ12CAQ-13-F signify?
The 'C' suffix denotes bi-directional configuration, meaning the device provides symmetrical clamping for both positive and negative transients without polarity sensitivity. This is confirmed in Diodes' DS40740 Rev. 15, Note 9, and distinguishes it from uni-directional variants like SMBJ12AQ-13-F which require correct anode/cathode orientation.
Is SMBJ12CAQ-13-F suitable for protecting CAN FD lines?
No - its 19.9V clamping voltage exceeds the typical 5V or 3.3V common-mode tolerance of CAN FD transceivers. It is intended for 12V power-line protection (e.g., VCC feeds to CAN nodes), not data-line clamping. For CAN FD data lines, lower-voltage TVS arrays with sub-5V VC (e.g., D3V3Z5U) are required.
How does SMBJ12CAQ-13-F perform at elevated ambient temperatures?
Its peak pulse power derates linearly at 4.8W/°C above +25°C (DS40740, p.2), and steady-state power drops to 5.0W at TL = +75°C. At +125°C ambient, usable peak power falls to ~120W - sufficient for infrequent transients but requires thermal modeling if mounted near heat sources.
Does SMBJ12CAQ-13-F have a defined junction capacitance value?
No specific capacitance is published for SMBJ12CAQ-13-F in DS40740. Figure 2 shows typical capacitance curves for the SMBJ family: bi-directional devices exhibit ~100–200pF at 0V bias and 1MHz, increasing with lower VRWM. For 12V parts, measured values fall near 150pF - acceptable for LIN or low-speed sensor lines but unsuitable for USB or high-speed CAN.
SMBJ12CAQ-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 30.2A
- Power - Peak Pulse:
- 600W
- 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:
- SMB
SMBJ12CAQ-13-F FAQ
1.How can I place an order for SMBJ12CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ12CAQ-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 SMBJ12CAQ-13-F reliable?
The price and inventory of SMBJ12CAQ-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 SMBJ12CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ12CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ12CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ12CAQ-13-F?
SMBJ12CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ12CAQ-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 SMBJ12CAQ-13-F?
For technical support, including SMBJ12CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ12CAQ-13-F requirements.
6.How does Aetrix verify that SMBJ12CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ12CAQ-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 SMBJ12CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ12CAQ-13-F?
All SMBJ12CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ12CAQ-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 SMBJ12CAQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ12CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ12CAQ-13-F Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
