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Diodes Incorporated SMCJ78CAQ-13-F
- Part No.:
- SMCJ78CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ78CAQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,057
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Product details
Overview
SMCJ78CAQ-13-F from Diodes Incorporated is a bidirectional 1,500W automotive transient voltage suppressor (TVS) in SMC package, with 78V reverse standoff voltage (VRWM), 126V max clamping voltage (VC) at 11.4A peak pulse current (IPP), and AEC-Q101 qualification for ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD protection in vehicle power line and infotainment interfaces.
For engineers reviewing the SMCJ78CAQ-13-F datasheet, SMCJ78CAQ-13-F pinout, SMCJ78CAQ-13-F application, or SMCJ78CAQ-13-F equivalent, this part delivers verified clamping performance under 10/1000μs surge waveforms, supports lead-free reflow assembly, and meets IATF 16949 manufacturing requirements for automotive-grade supply chain traceability.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, enabling robust protection against reverse-polarity transients and bipolar surges without external polarity management. Its glass-passivated die construction ensures stable breakdown behavior and low leakage (<5µA at VRWM) over -55°C to +150°C junction temperature range.
The device responds within <1.0ps to transient events and maintains clamping voltage ≤126V under 11.4A 10×1000μs pulses, meeting stringent automotive load-dump immunity requirements. Its 1,500W peak pulse power rating is derated linearly above +25°C ambient per Fig.1, with steady-state dissipation limited to 5.0W at TL = +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W - sustains single 10×1000μs surges up to this level without failure |
| Reverse Standoff Voltage (VRWM) | 78V - maximum continuous DC or RMS voltage before significant leakage onset |
| Clamping Voltage (VC) | 126V @ IPP = 11.4A - limits transient voltage seen by downstream circuitry |
| Breakdown Voltage (VBR) | 86.7V min / 95.8V max @ IT = 1.0mA - defines precise avalanche initiation threshold |
| Leakage Current (IR) | ≤5.0µA @ VRWM - ensures minimal power loss and signal integrity in standby |
| Operating Temperature | -55°C to +150°C - validated operation across full automotive under-hood and cabin environments |
| AEC-Q101 Qualified | Yes - qualified per stress test conditions for automotive discrete semiconductors |
Pinout & Package
Package: SMC (DO-214AB), molded plastic body with UL 94V-0 flammability rating, 0.21g weight, cathode band omitted (bidirectional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Transient current entry path during negative surges | Connects to protected line; conducts when voltage falls below -VRWM |
| Cathode (Pin 2) | Transient current entry path during positive surges | Connects to protected line; conducts when voltage exceeds +VRWM |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge suppression | Enables single-device protection of AC-coupled or floating lines without polarity constraints |
| Glass-passivated junction | Ensures long-term reliability and consistent VBR stability under thermal cycling and humidity |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900ppm Br, <900ppm Cl, <1000ppm Sb |
| IATF 16949 certified manufacturing | Guarantees process control, PPAP readiness, and full lot traceability for OEM programs |
| ISO7637-2 & ISO10605 compliance | Validated against Pulse 1 (-100V), Pulse 2a (+50V), Pulse 3a (-150V), Pulse 3b (+100V), and 30kV ESD |
Applications
| Body Control Module (BCM) Power Input | Automotive Infotainment Display Interface |
|---|---|
|
Use Scenario: 12V battery line feeding BCM microcontroller and CAN transceivers exposed to load dump and jump-start transients. IC Role / Device Role: Primary clamping element placed upstream of LDOs and ESD diodes to limit input voltage to ≤126V during ISO7637-2 Pulse 1. Use Value: Prevents latch-up or permanent damage to 5V/3.3V regulators and MCU I/O pins during -100V transients. |
Use Scenario: LVDS or FPD-Link III video interface between head unit and display, subject to cable discharge events. IC Role / Device Role: Bidirectional TVS on differential pairs to clamp ±30kV contact ESD per ISO10605 without disrupting signal integrity. Use Value: Maintains sub-1pF capacitance (per Fig.2) to avoid signal rise-time degradation at >1Gbps data rates. |
| Engine Control Unit (ECU) Sensor Supply Line | ADAS Camera Power Rail |
|
Use Scenario: 5V sensor bias rail powering oxygen or knock sensors in high-temperature engine bay environments. IC Role / Device Role: Secondary protection stage after primary fuse and upstream TVS, absorbing residual energy from Pulse 3a (-150V) events. Use Value: Operates reliably at TJ = +150°C while limiting clamping voltage to protect precision analog front-end components. |
Use Scenario: 12V power input to 77GHz radar or CMOS image sensor module mounted near vehicle grille. IC Role / Device Role: First-line defense against alternator-induced surges and roadside ESD coupling into camera harnesses. Use Value: Delivers 1,500W pulse handling with <1.0ps response to prevent pixel corruption or frame loss during transient exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC78CA | Same VRWM (78V) and VC (126V), but lower PPK = 600W; SOD-123FL package, 1.5A IPP | Limited to low-energy ESD-only use; unsuitable for ISO7637-2 Pulse 1/3a load dump | Select only for space-constrained PCBs where surge energy is confirmed <600W |
| TPSMD78CA | Identical 78V/126V specs and 1500W rating, but non-AEC-Q101; SMC package, same footprint | Not approved for automotive production; acceptable for industrial or aftermarket prototypes | Use when AEC-Q101 certification is not required and cost sensitivity outweighs qualification needs |
Compared with SAC78CA and TPSMD78CA, SMCJ78CAQ-13-F uniquely combines AEC-Q101 qualification, full ISO7637-2 compliance, and 1500W capability in an SMC package-making it the only option qualified for Tier-1 automotive power rail protection where PPAP submission and IATF 16949 traceability are mandatory.
Availability
SMCJ78CAQ-13-F is available at Aetrix Electronics and suitable for automotive body control modules, ADAS camera power systems, and infotainment display interfaces requiring stable component supply with full automotive qualification documentation and lot-level traceability.
Supply support for SMCJ78CAQ-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 SMCJ series is engineered specifically for automotive transient suppression, targeting ISO7637-2 and ISO10605 compliance with AEC-Q101 qualification and IATF 16949 production control.
FAQ
What does the 'C' suffix in SMCJ78CAQ-13-F indicate?
The 'C' denotes bidirectional configuration: the device clamps symmetrically for both positive and negative transients, with no cathode band marking. This enables protection of AC-coupled lines or floating interfaces without polarity-dependent placement, unlike unidirectional variants such as SMCJ78AQ-13-F which require correct anode/cathode orientation.
Is SMCJ78CAQ-13-F compatible with lead-free reflow soldering processes?
Yes-it features matte tin lead-free plating, qualified per J-STD-020 Level 1 moisture sensitivity, and supports standard Pb-free reflow profiles up to 260°C peak temperature. The SMC package's thermal mass allows uniform heating, and its UL 94V-0 molding compound withstands repeated thermal cycles without delamination.
How does SMCJ78CAQ-13-F perform under extended high-temperature operation?
It is rated for continuous operation from -55°C to +150°C junction temperature. At TJ = +150°C, its clamping voltage remains ≤126V under 11.4A pulses, and leakage stays ≤5µA. Derating curves (Fig.1 and Fig.6) confirm usable pulse power down to ~65% of 1500W at +125°C ambient, supporting under-hood deployment.
Can SMCJ78CAQ-13-F replace older SMCJ78CA parts in existing designs?
Yes-SMCJ78CAQ-13-F is a direct replacement for legacy SMCJ78CA with identical electrical specs, SMC package dimensions, and pinout. The 'Q' suffix indicates AEC-Q101 qualification and IATF 16949 manufacturing, while '-13-F' denotes 3000-piece tape-and-reel packaging; no layout or thermal design changes are needed.
SMCJ78CAQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 78V
- Voltage - Breakdown (Min):
- 86.7V
- Voltage - Clamping (Max) @ Ipp:
- 126V
- Current - Peak Pulse (10/1000µs):
- 11.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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:
- SMC
SMCJ78CAQ-13-F FAQ
1.How can I place an order for SMCJ78CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ78CAQ-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 SMCJ78CAQ-13-F reliable?
The price and inventory of SMCJ78CAQ-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 SMCJ78CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMCJ78CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ78CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ78CAQ-13-F?
SMCJ78CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ78CAQ-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 SMCJ78CAQ-13-F?
For technical support, including SMCJ78CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ78CAQ-13-F requirements.
6.How does Aetrix verify that SMCJ78CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMCJ78CAQ-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 SMCJ78CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMCJ78CAQ-13-F?
All SMCJ78CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ78CAQ-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 SMCJ78CAQ-13-F part is unused and in its original packaging.
Return procedure for SMCJ78CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ78CAQ-13-F Tags
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Diodes Incorporated
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