My Inquiry
My Account
Diodes Incorporated SMAJ8.5AQ-13-F
- Part No.:
- SMAJ8.5AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ8.5AQ-13-F.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:2,813
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ8.5AQ-13-F from Diodes Incorporated is a unidirectional 400W automotive transient voltage suppressor (TVS) diode with 8.5V reverse standoff voltage, 9.44–10.4V breakdown range at 1mA, and 14.4V max clamping voltage at 27.7A peak pulse current. It protects CAN, LIN, and sensor interfaces in 12V automotive power domains against ISO7637-2 Pulse 1 (−100V), Pulse 2a (+50V), and ISO10605 ESD (±30kV).
For engineers reviewing the SMAJ8.5AQ-13-F datasheet, SMAJ8.5AQ-13-F pinout, SMAJ8.5AQ-13-F application, or SMAJ8.5AQ-13-F equivalent, this device is selected for AEC-Q101-compliant surge protection where clamping voltage margin, low leakage (<10µA @ 8.5V), and IATF 16949-manufactured traceability are critical.
Technical Context
This unidirectional TVS operates as a fast-acting shunt clamp during transients, leveraging glass-passivated silicon junctions to achieve sub-nanosecond response time and stable VBR over temperature. Its 1.0W steady-state power rating at TL = +75°C supports continuous bias in always-on vehicle networks.
Designed for ISO10605 (30kV air/contact discharge) and ISO7637-2 compliance, it delivers 400W peak pulse power under 10/1000µs waveform with derating above +25°C ambient. The cathode-band polarity indicator ensures correct PCB orientation for unidirectional surge diversion to ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 10/1000µs surges up to 27.7A without failure |
| Reverse Standoff Voltage (VRWM) | 8.5V - blocks normal 12V system operation while remaining fully inactive below threshold |
| Breakdown Voltage (VBR) | 9.44–10.4V @ 1mA - defines precise conduction onset for predictable clamping behavior |
| Max Clamping Voltage (VC) | 14.4V @ IPP = 27.7A - limits downstream IC stress to safe levels during ISO7637-2 Pulse 1 |
| Reverse Leakage (IR) | <10µA @ 8.5V - minimizes quiescent current drain in battery-sensitive modules |
| Operating Temperature | −55°C to +175°C - supports under-hood placement in engine control units and ADAS sensors |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including HTOL, TC, and ESD testing per AEC standard |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic UL 94V-0 housing; weight ≈ 0.064g; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path | Connected to system ground or chassis to complete clamping loop during transient events |
| Cathode | Protected line input | Connected to protected signal/power line (e.g., CAN_H); cathode band marks polarity |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Ensures stable VBR and low parameter drift across −55°C to +175°C operating range |
| Lead-free, RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900ppm Br, <900ppm Cl, <1000ppm Sb - suitable for global automotive supply chains |
| ISO7637-2 & ISO10605 certified | Validated for Pulse 1 (−100V), Pulse 2a (+50V), Pulse 3a/b, and ±30kV ESD - eliminates need for external qualification |
| 40A IFSM surge rating | Withstands repetitive 8.3ms half-sine surges up to 40A - supports robustness in alternator load-dump scenarios |
Applications
| Automotive CAN Bus Protection | Body Control Module (BCM) Power Input |
|---|---|
Use Scenario: Protecting high-speed CAN FD transceivers from load dump and jump-start transients on 12V supply rails. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VCC and GND upstream of LDO regulator. Use Value: Clamps to 14.4V during −100V ISO7637-2 Pulse 1, preventing LDO overvoltage failure and maintaining CAN communication integrity. |
Use Scenario: Safeguarding microcontroller power inputs in door modules exposed to ESD during assembly and service. IC Role / Device Role / Timing Role: Primary ESD suppression element on 12V input before DC-DC converter. Use Value: Absorbs ±30kV contact discharge per ISO10605 without degradation, preserving BCM uptime and field-reliability metrics. |
| Engine Coolant Temperature Sensor Interface | ADAS Camera Power Line |
Use Scenario: Shielding analog sensor outputs from ignition noise and alternator ripple in engine bay environments. IC Role / Device Role / Timing Role: Low-leakage (≤10µA) TVS on sensor signal line referenced to chassis ground. Use Value: Maintains signal fidelity with <10µA reverse leakage at 8.5V, avoiding offset errors in precision ratiometric measurements. |
Use Scenario: Securing 12V power input to 77GHz radar camera modules mounted behind front grilles. IC Role / Device Role / Timing Role: First-line transient suppressor before buck converter and image sensor ASIC. Use Value: Withstands repeated +50V Pulse 2a events during vehicle cranking, ensuring uninterrupted camera boot and calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5A-13-F | No AEC-Q101 qualification; RoHS-compliant but not PPAP-capable; same electrical specs | Acceptable for non-safety-critical consumer or industrial use; not approved for OEM automotive BOMs | Select only if AEC-Q101 and IATF 16949 traceability are not required. |
| SMCJ8.5A-Q | Higher 1500W peak power; DO-214AB package; 10% higher VC (15.9V) | Better suited for 24V commercial vehicle systems; larger footprint requires PCB redesign | Choose when surge energy exceeds 400W or system voltage is >16V nominal. |
Compared with SMAJ8.5A-13-F, the AQ variant adds AEC-Q101 validation and PPAP support for automotive production; versus SMCJ8.5A-Q, it trades peak power for smaller SMA footprint and tighter clamping-ideal for space-constrained 12V ECUs.
Availability
SMAJ8.5AQ-13-F is available at Aetrix Electronics and suitable for automotive body electronics, powertrain sensor interfaces, and ADAS camera modules requiring stable component supply with full AEC-Q101 documentation and lot-level traceability.
Supply support for SMAJ8.5AQ-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and computing markets, with design centers across Asia, Europe, and the US.
The SMAJ-AQ series targets AEC-Q101-compliant transient protection for 12V automotive subsystems, emphasizing low clamping voltage, high temperature resilience, and IATF 16949 process control for zero-defect manufacturing.
FAQ
What is the maximum clamping voltage of SMAJ8.5AQ-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 14.4V at IPP = 27.7A under the standard 10×1000µs waveform. This value is guaranteed across all production lots and validated per ISO7637-2 test conditions, ensuring consistent overvoltage protection for downstream ICs.
Is SMAJ8.5AQ-13-F suitable for bi-directional signal lines like USB or HDMI?
No - SMAJ8.5AQ-13-F is unidirectional only, with cathode-band polarity marking. For bidirectional data lines, Diodes' SMAJ8.5CQ-13-F (bi-directional version) must be used, which provides symmetrical clamping for both polarities and meets ISO10605 requirements in either direction.
How does the 1.0W steady-state power dissipation rating apply in circuit design?
The 1.0W PM(AV) rating applies at lead temperature TL = +75°C, not ambient. In practice, this means the device can continuously dissipate up to 1.0W when soldered to a PCB with adequate copper pour and thermal vias - critical for protecting always-on circuits like CAN wake-up receivers without thermal runaway.
Does SMAJ8.5AQ-13-F require derating at elevated ambient temperatures?
Yes - peak pulse power must be derated linearly above +25°C ambient per Figure 1 in DS40739. At +85°C ambient, PPK is reduced to ~280W (70% of 400W), and at +125°C, it drops to ~160W (40%). Designers must verify worst-case transient energy remains within derated limits for target operating environment.
SMAJ8.5AQ-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 27.7A
- 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
SMAJ8.5AQ-13-F FAQ
1.How can I place an order for SMAJ8.5AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ8.5AQ-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 SMAJ8.5AQ-13-F reliable?
The price and inventory of SMAJ8.5AQ-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 SMAJ8.5AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ8.5AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ8.5AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ8.5AQ-13-F?
SMAJ8.5AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ8.5AQ-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 SMAJ8.5AQ-13-F?
For technical support, including SMAJ8.5AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ8.5AQ-13-F requirements.
6.How does Aetrix verify that SMAJ8.5AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ8.5AQ-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 SMAJ8.5AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ8.5AQ-13-F?
All SMAJ8.5AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ8.5AQ-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 SMAJ8.5AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ8.5AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ8.5AQ-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…
