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Diodes Incorporated SMCJ70AQ-13-F
- Part No.:
- SMCJ70AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,534
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Product details
Overview
SMCJ70AQ-13-F from Diodes Incorporated is a unidirectional 1,500W automotive-grade transient voltage suppressor (TVS) diode in SMC package, with 70V reverse standoff voltage (VRWM), 113V max clamping voltage (VC) at 13.3A peak pulse current (IPP), and AEC-Q101 qualification for under-hood power line surge protection in ISO7637-2 Pulse 1/2a/3a/3b-compliant systems.
For engineers reviewing the SMCJ70AQ-13-F datasheet, SMCJ70AQ-13-F pinout, SMCJ70AQ-13-F application, or SMCJ70AQ-13-F equivalent, key selection criteria include clamping performance under 10/1000μs transients, thermal derating above +25°C ambient, bidirectional vs. unidirectional polarity configuration, and IATF 16949 manufacturing traceability for automotive BOMs.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector in parallel with sensitive loads, responding within <1 ps to fast-rising transients. Its glass-passivated junction ensures stable breakdown behavior across -55°C to +150°C junction temperature range and supports 200A non-repetitive forward surge current (IFSM) per 8.3ms half-sine waveform.
Clamping is defined by the 10×1000μs standard waveform (Fig. 4), delivering 113V VC at IPP = 13.3A - enabling robust protection of 70V-rated CAN FD, LIN, or body control modules against load dump and inductive switching events without overvoltage stress on downstream ICs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W - sustains single-event surges up to 10×1000μs without failure |
| Reverse Standoff Voltage | 70V - blocks normal operating voltage while remaining inactive until transient exceeds threshold |
| Max Clamping Voltage | 113V @ 13.3A - limits voltage seen by protected circuit during worst-case ISO7637-2 Pulse 1 (-100V) |
| Breakdown Voltage | 77.8–86.0V @ 1mA - ensures reliable turn-on margin above VRWM for consistent clamping onset |
| Leakage Current | 5μA @ 70V - negligible standby power loss and no signal integrity impact in high-impedance lines |
| Junction Temp Range | -55°C to +150°C - validated operation in engine bay environments with thermal cycling |
Pinout & Package
Package: SMC (DO-214AB), molded plastic UL 94V-0, 0.21g weight, cathode band polarity indicator, lead-free matte tin plating, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Banded End) | Anode-to-cathode conduction path | Connects to protected line; conducts when transient exceeds VRWM to clamp voltage |
| Anode (Non-banded End) | Reference/ground return path | Must be tied to low-impedance chassis or system ground to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| 1,500W Peak Pulse Power | Enables single-point protection of 12V/24V/48V automotive subsystems against ISO7637-2 Pulse 1 (−100V) without cascaded devices |
| AEC-Q101 Qualified | Validated reliability for automotive use including temperature cycling, humidity bias, and mechanical shock per stress test plan |
| Glass Passivated Die | Eliminates surface leakage paths and improves long-term stability under high-humidity under-hood conditions |
| Fast Response Time | <1 ps junction response ensures clamping initiates before transient edge propagates into protected IC inputs |
Applications
| Engine Control Unit (ECU) Power Input | CAN FD Bus Line Protection |
|---|---|
Use Scenario: 12V battery feed to ECU main regulator subjected to load dump transients up to −100V per ISO7637-2 Pulse 1. IC Role / Device Role / Timing Role: Shunt TVS placed upstream of input filter capacitor to clamp voltage before it reaches DC/DC controller. Use Value: Limits peak voltage to 113V, preventing overvoltage damage to 75V-rated input MOSFETs and enabling use of lower-cost input stage components. | Use Scenario: CAN FD physical layer (PHY) transceiver exposed to coupled noise from adjacent high-current solenoid drivers. IC Role / Device Role / Timing Role: Bidirectional clamping between CANH/CANL lines and chassis ground to suppress common-mode transients. Use Value: Maintains signal integrity by limiting differential swing to <2.5Vpp during 30kV ESD events (ISO10605), preserving bit error rate below 10⁻¹². |
| Body Control Module (BCM) LIN Bus | ADAS Camera Power Rail |
Use Scenario: LIN bus node powered from vehicle battery via local LDO, vulnerable to slow-rising transients from alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS from LIN line to ground, triggered only on positive overvoltage events. Use Value: Prevents latch-up in LIN transceivers by clamping >40V excursions while adding <0.5pF capacitance to preserve 19.2kbps timing margins. | Use Scenario: 5V/3.3V power rail for 12MP automotive camera module located near HVAC blower motor. IC Role / Device Role / Timing Role: Secondary TVS stage after primary fuse and LC filter, providing final overvoltage barrier before image sensor and ISP. Use Value: Absorbs residual 50V pulses (ISO7637-2 Pulse 2a) that penetrate front-end filtering, ensuring no voltage excursion exceeds 3.6V at sensor VDD pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC70-13-F | Same 70V VRWM but 600W PPK rating; smaller SMA package; higher VC (120V) | Limited to lower-energy transients (e.g., ISO10605 only); unsuitable for ISO7637-2 Pulse 1 | Select when space-constrained and surge energy ≤600W; verify clamping margin with protected IC absolute maximum ratings. |
| SMCJ70A-Q | Identical electrical specs but different packaging: bulk vs. tape-and-reel; same AEC-Q101 qualification | No functional difference; used interchangeably where reel-based SMT assembly is required | Prefer SMCJ70AQ-13-F for automated pick-and-place; SMCJ70A-Q for manual prototyping or low-volume hand-soldering. |
Compared with SAC70-13-F and SMCJ70A-Q, SMCJ70AQ-13-F uniquely delivers full 1500W surge handling in tape-and-reel format with verified AEC-Q101 compliance - making it the only option qualified for production deployment in high-energy automotive power-line protection.
Availability
SMCJ70AQ-13-F is available at Aetrix Electronics and suitable for engine control units, ADAS camera power rails, body control modules, and CAN FD bus nodes requiring stable component supply with full automotive change control and PPAP documentation support.
Supply support for SMCJ70AQ-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 company specializing in discrete, analog, and mixed-signal solutions, with design, manufacturing, and test facilities certified to IATF 16949 for automotive-grade products.
The SMCJ series is part of Diodes' Automotive TVS portfolio, engineered specifically to meet ISO7637-2 and ISO10605 requirements for harsh-environment transient suppression in vehicles - emphasizing clamping consistency, thermal robustness, and process-controlled reliability.
FAQ
What is the maximum clamping voltage of SMCJ70AQ-13-F under a 10×1000μs transient?
The maximum clamping voltage (VC) is 113V at 13.3A peak pulse current (IPP), measured per the 10×1000μs waveform defined in REA standards and confirmed in Diodes' DS40741 Rev. 8-2 datasheet Figure 4. This value is guaranteed across the full operating temperature range and forms the basis for protected IC voltage margining.
Is SMCJ70AQ-13-F bidirectional or unidirectional?
SMCJ70AQ-13-F is unidirectional, indicated by the absence of "C" in its part number suffix. It conducts only during positive transients relative to its cathode terminal and requires correct polarity installation - unlike bidirectional variants (e.g., SMCJ70CAQ-13-F) which protect both polarities without orientation dependency.
Does this TVS diode require a heatsink for continuous operation?
No heatsink is required for transient suppression duty, as the device handles energy in short bursts. However, steady-state power dissipation is limited to 5.0W at TL = +75°C (derated linearly to zero at +150°C), so PCB copper area must provide sufficient thermal conduction to maintain lead temperature below 75°C during sustained fault conditions or repeated surges.
How does SMCJ70AQ-13-F differ from industrial-grade SMCJ70A?
SMCJ70AQ-13-F adds AEC-Q101 qualification, PPAP capability, and IATF 16949 manufacturing certification - including enhanced process controls, lot traceability, and extended environmental stress testing. Electrically identical, it is designated for automotive production whereas SMCJ70A targets commercial/industrial applications without automotive change control requirements.
SMCJ70AQ-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 13.3A
- 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
SMCJ70AQ-13-F FAQ
1.How can I place an order for SMCJ70AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70AQ-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 SMCJ70AQ-13-F reliable?
The price and inventory of SMCJ70AQ-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 SMCJ70AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMCJ70AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70AQ-13-F?
SMCJ70AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70AQ-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 SMCJ70AQ-13-F?
For technical support, including SMCJ70AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70AQ-13-F requirements.
6.How does Aetrix verify that SMCJ70AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMCJ70AQ-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 SMCJ70AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMCJ70AQ-13-F?
All SMCJ70AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70AQ-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 SMCJ70AQ-13-F part is unused and in its original packaging.
Return procedure for SMCJ70AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70AQ-13-F Tags
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