My Inquiry
My Account
Diodes Incorporated SMAJ70CAQ-13-F
- Part No.:
- SMAJ70CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ70CAQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMA
- Quantity:
- Payment:
- Shipping:
Inventory:3,926
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ70CAQ-13-F from Diodes Incorporated is a bi-directional 400W automotive transient voltage suppressor (TVS) diode with 70V reverse standoff voltage, 113V max clamping voltage at 3.5A peak pulse current, and AEC-Q101 qualification for under-hood power line protection in ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD environments.
For engineers reviewing the SMAJ70CAQ-13-F datasheet, SMAJ70CAQ-13-F pinout, SMAJ70CAQ-13-F application, or SMAJ70CAQ-13-F equivalent, this part supports critical surge immunity validation in 12V/24V automotive ECUs, body control modules, and infotainment power rails where bidirectional clamping and IATF 16949 traceability are required.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, delivering 400W peak pulse power per IEC 61000-4-5 10/1000μs waveform and clamping transients to ≤113V at IPP = 3.5A. Its glass-passivated junction ensures stable breakdown behavior over -55°C to +175°C junction temperature range.
Designed specifically for automotive use, it meets ISO7637-2 Pulse 1 (-100V), Pulse 2a (+50V), Pulse 3a (-150V), and Pulse 3b (+100V), with <0.5μA reverse leakage at VRWM and full compliance to ISO10605 (30kV air/contact discharge).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 10×1000μs surges without failure in automotive load dump scenarios |
| Reverse Standoff Voltage | 70V - blocks normal 12V/24V system operating voltages while remaining inactive until transient exceeds threshold |
| Max Clamping Voltage | 113V @ IPP = 3.5A - limits downstream IC stress during ISO7637-2 Pulse 3a (-150V) events |
| Breakdown Voltage | 77.8–86.0V @ IT = 1mA - tight VBR tolerance ensures predictable turn-on timing across temperature |
| Operating Temperature | -55°C to +175°C - supports placement near engines, transmission controllers, and other high-heat zones |
| ESD Rating | ±30kV contact/air per ISO10605 - protects CAN/LIN/FlexRay interfaces from human-body-model discharges |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic UL 94V-0 housing, cathode band omitted (bi-directional device), 0.064g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts surge current equally in either polarity relative to cathode |
| Cathode | Transient return path (bidirectional) | Connects to ground or common reference; forms symmetrical clamping pair with anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use with PPAP documentation and IATF 16949 manufacturing control |
| Glass-passivated die | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| Bi-directional clamping | Protects AC-coupled lines (e.g., LIN bus, sensor differential pairs) without polarity constraints |
| Lead-free & halogen-free | Meets RoHS 3 and automotive "Green" standards (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) LIN Bus |
|---|---|
Use Scenario: 12V battery feed to microcontroller power supply subjected to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main VBAT rail upstream of DC-DC converter. Use Value: Limits transient excursions to ≤113V, preventing damage to 75V-rated input capacitors and LDO regulators. |
Use Scenario: LIN physical layer transceiver exposed to cable coupling and ESD during vehicle assembly. IC Role / Device Role / Timing Role: Bidirectional line protector on LIN data line (VPW) referenced to chassis ground. Use Value: Clamps ±30kV ESD strikes without latch-up, preserving signal integrity and avoiding bus shutdown. |
| Infotainment Head Unit USB Power | ADAS Camera Power Interface |
Use Scenario: USB VBUS line in center console sharing 12V supply with multiple peripherals. IC Role / Device Role / Timing Role: Secondary surge limiter after primary fuse and upstream TVS, protecting USB controller IC. Use Value: Adds redundancy against fast-rising transients missed by slower fuses, enabling robust hot-plug operation. |
Use Scenario: 12V power input to rear-view camera module mounted externally on vehicle bumper. IC Role / Device Role / Timing Role: Final-stage clamping device before camera power regulator, placed adjacent to connector. Use Value: Withstands repeated ISO7637-2 Pulse 3b (+100V) events from nearby relay switching and antenna coupling. |
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 |
|---|---|---|---|
| SMAJ70CA-13-F (Diodes) | No AEC-Q101 qualification; non-automotive grade; identical electrical specs | Lacks PPAP support and IATF 16949 traceability; unsuitable for production automotive BOMs | Select only for prototyping or non-automotive industrial use where qualification is not mandated |
| SMBJ70CA-Q (ON Semiconductor) | SMB package (larger footprint); 400W rating; AEC-Q101 qualified; 113V VC @ 3.5A | Requires PCB redesign due to 5.3mm × 4.6mm SMB vs. 4.6mm × 2.9mm SMA; higher thermal mass | Choose when higher thermal dissipation margin is needed or existing SMB layout exists |
Compared with SMAJ70CAQ-13-F, the non-qualified SMAJ70CA-13-F sacrifices automotive change control and supply chain rigor, while SMBJ70CA-Q trades compactness for enhanced thermal handling-making the Q-grade SMA variant optimal for space-constrained, production-critical automotive nodes.
Availability
SMAJ70CAQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, infotainment systems, and ADAS camera interfaces requiring stable component supply with full automotive traceability and lifecycle management.
Supply support for SMAJ70CAQ-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 SMAJ-Q automotive TVS family, engineered for robust transient suppression in harsh-temperature vehicle subsystems compliant with ISO7637-2 and ISO10605.
FAQ
What does the 'Q' suffix signify in SMAJ70CAQ-13-F?
The 'Q' suffix denotes full AEC-Q101 qualification, PPAP capability, and manufacture in IATF 16949-certified facilities-required for inclusion in automotive production BOMs. It confirms rigorous stress testing including HTOL, TC, UHAST, and ESD, with full lot traceability and change control documentation.
Can SMAJ70CAQ-13-F be used in unidirectional configurations?
No-it is strictly bi-directional (denoted by the 'C' in the part number). For unidirectional operation, select SMAJ70AQ-13-F, which features a cathode band and asymmetric clamping behavior optimized for DC-biased lines like power inputs with defined polarity.
How does its clamping performance compare at elevated temperatures?
Clamping voltage increases by ~0.1% per °C above 25°C; at +125°C, VC rises to approximately 117V at 3.5A. The device remains fully functional up to TJ = +175°C, with derated peak power per Figure 1's pulse derating curve.
Is the SMA package suitable for automated optical inspection (AOI)?
Yes-the SMA package has a standardized top-side marking ('RP' for SMAJ70CAQ), visible cathode band omission confirming bi-directionality, and consistent solder pad geometry compatible with standard AOI algorithms for polarity and placement verification.
SMAJ70CAQ-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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 3.5A
- 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
SMAJ70CAQ-13-F FAQ
1.How can I place an order for SMAJ70CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ70CAQ-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 SMAJ70CAQ-13-F reliable?
The price and inventory of SMAJ70CAQ-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 SMAJ70CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ70CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ70CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ70CAQ-13-F?
SMAJ70CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ70CAQ-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 SMAJ70CAQ-13-F?
For technical support, including SMAJ70CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ70CAQ-13-F requirements.
6.How does Aetrix verify that SMAJ70CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ70CAQ-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 SMAJ70CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ70CAQ-13-F?
All SMAJ70CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ70CAQ-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 SMAJ70CAQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ70CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ70CAQ-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…
