My Inquiry
My Account
Diodes Incorporated SMAJ170AQ-13-F
- Part No.:
- SMAJ170AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ170AQ-13-F.pdf
- Description:
- TVS DIODE 170VWM 275VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,720
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ170AQ-13-F from Diodes Incorporated is a unidirectional 400W surface-mount automotive transient voltage suppressor (TVS) diode with 170V reverse standoff voltage, 275V max clamping voltage at 1.4A peak pulse current, and AEC-Q101 qualification for under-hood electronics. It protects CAN/LIN bus interfaces and power supply rails against ISO7637-2 Pulse 1 (−100V), Pulse 2a (+50V), Pulse 3a (−150V), and ISO10605 ESD events.
For engineers reviewing the SMAJ170AQ-13-F datasheet, SMAJ170AQ-13-F pinout, SMAJ170AQ-13-F application, or SMAJ170AQ-13-F equivalent, this part supports high-reliability automotive surge protection where precise clamping voltage, low leakage (<0.5µA @ 170V), and IATF 16949-manufactured consistency are required.
Technical Context
This TVS diode uses glass-passivated silicon junction construction to achieve fast response (<1.0ps) to transients and stable clamping performance across −55°C to +175°C junction temperature range. Its unidirectional polarity enables asymmetric surge suppression on DC-biased lines such as battery-fed ECUs and sensor power inputs.
The device complies with ISO7637-2 Pulse 1, 2a, and 3a waveforms and meets ISO10605 ESD immunity requirements (30kV air/contact discharge). Its 1.0W steady-state power dissipation at TL = +75°C supports continuous operation in thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 10×1000µs transients without failure in automotive load-dump scenarios |
| Reverse Standoff Voltage (VRWM) | 170V - blocks normal operating voltage up to 170V DC while remaining non-conductive |
| Max Clamping Voltage (VC) | 275V @ IPP = 1.4A - limits transient voltage to ≤275V during ISO7637-2 Pulse 1 (−100V) |
| Breakdown Voltage (VBR) | 189–209V @ IT = 1.0mA - ensures reliable turn-on margin above VRWM for robust surge detection |
| Reverse Leakage (IR) | <0.5µA @ VRWM - minimizes standby power loss in always-on vehicle modules |
| Operating Temperature | −55°C to +175°C - supports placement near engines, inverters, and other high-temperature zones |
Pinout & Package
Package: SMA (DO-214AC), molded plastic UL 94V-0 housing, cathode band polarity indicator, 0.064g mass, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during reverse transient | Connected to protected line (e.g., CAN_H); conducts surge current to ground when VC exceeded |
| Cathode | Reference terminal / bias connection | Connected to system ground or higher-potential rail; defines unidirectional conduction direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Ensures stable VBR and low IR over lifetime, critical for 15+ year automotive service life |
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, HAST, and mechanical shock testing |
| Lead-free & halogen-free | RoHS 3 compliant (2015/863/EU); <900ppm Br, <900ppm Cl, <1000ppm Sb - meets global Tier-1 OEM green mandates |
| ISO7637-2 & ISO10605 certified | Pre-validated for full compliance with automotive EMC test pulses - reduces system-level validation effort |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protects 12V supply input of BCM against load dump and jump-start surges. IC Role / Device Role / Timing Role: Primary clamping device on main power rail; responds within picoseconds to limit voltage excursion. Use Value: Prevents damage to downstream LDOs and microcontrollers by clamping transients to ≤275V while maintaining <0.5µA leakage at 170V nominal. |
Use Scenario: Shields ECU 5V/3.3V regulator inputs from coupled noise on engine harnesses. IC Role / Device Role / Timing Role: Secondary protection stage after fuse and common-mode choke; handles differential-mode spikes. Use Value: Enables compliance with ISO7637-2 Pulse 3a (−150V) without derating, due to 175°C max TJ rating and stable clamping. |
| CAN Transceiver Interface | ADAS Camera Power Line |
Use Scenario: Safeguards CAN_H/CAN_L pins of high-speed transceivers against ESD and cable discharge. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on biased data lines; placed adjacent to connector. Use Value: Maintains signal integrity with minimal parasitic capacitance while delivering 30kV ISO10605 contact discharge immunity. |
Use Scenario: Guards 12V power feed to 77GHz radar or surround-view camera modules. IC Role / Device Role / Timing Role: Front-end surge absorber before DC-DC converter; withstands repeated load-dump events. Use Value: Supports ASIL-B functional safety requirements via PPAP-capable manufacturing and IATF 16949 traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170A-13-F | Non-automotive grade; lacks AEC-Q101 qualification and PPAP documentation | Restricted to industrial or consumer designs without automotive reliability or audit requirements | Select only if cost sensitivity outweighs long-term field reliability and OEM compliance needs |
| SMCJ170A-Q | Higher 1500W peak power, DO-214AB package (larger footprint), same VRWM/VC specs | Better suited for high-energy load-dump protection in alternator circuits or battery disconnect paths | Choose when surge energy exceeds 400W capability or board space allows larger SMC package |
Compared with SMAJ170AQ-13-F, the SMAJ170A-13-F omits automotive change control and traceability, while the SMCJ170A-Q trades compactness for higher energy handling-making the AQ variant optimal for space-constrained, AEC-Q101–mandated ECU and ADAS subassemblies.
Availability
SMAJ170AQ-13-F is available at Aetrix Electronics and suitable for body control modules, engine control units, CAN interface protection, and ADAS camera power systems requiring stable component supply, full automotive qualification, and RoHS 3 compliance.
Supply support for SMAJ170AQ-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This device belongs to Diodes' AEC-Q101–qualified SMAJ-Q automotive TVS family, engineered specifically for ISO7637-2 and ISO10605 compliance in harsh-temperature vehicle subsystems.
FAQ
What is the maximum clamping voltage of SMAJ170AQ-13-F under ISO7637-2 Pulse 1 conditions?
The maximum clamping voltage is 275V at 1.4A peak pulse current, measured per 10×1000µs waveform (Figure 4 in DS40739). This value ensures compliance with ISO7637-2 Pulse 1 (−100V) by limiting transient overshoot to a safe margin below downstream IC absolute maximum ratings.
Does SMAJ170AQ-13-F support bi-directional surge suppression?
No - SMAJ170AQ-13-F is unidirectional, indicated by the absence of "C" suffix. Bi-directional variants (e.g., SMAJ170CAQ-13-F) exist but have different marking, no cathode band, and doubled IR specification for VRWM ≤10V - not applicable here.
How does the glass-passivated die improve long-term reliability in automotive environments?
Glass passivation prevents moisture ingress and metallization migration at high temperature/humidity, maintaining stable VBR and IR over 15+ years. This is validated per AEC-Q101 stress tests including 1000-hour HTSL and 1000-cycle temperature cycling (−40°C to +125°C).
Can SMAJ170AQ-13-F be used in 24V commercial vehicle systems?
Yes - its 170V VRWM provides sufficient margin above 28V nominal systems (derated to ~24V under load), and its −55°C to +175°C operating range covers heavy-duty truck under-hood temperatures. Pulse testing confirms robustness against 24V-specific transients like ISO7637-2 Pulse 5a.
SMAJ170AQ-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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 1.4A
- 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
SMAJ170AQ-13-F FAQ
1.How can I place an order for SMAJ170AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ170AQ-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 SMAJ170AQ-13-F reliable?
The price and inventory of SMAJ170AQ-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 SMAJ170AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ170AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ170AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ170AQ-13-F?
SMAJ170AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ170AQ-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 SMAJ170AQ-13-F?
For technical support, including SMAJ170AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ170AQ-13-F requirements.
6.How does Aetrix verify that SMAJ170AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ170AQ-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 SMAJ170AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ170AQ-13-F?
All SMAJ170AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ170AQ-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 SMAJ170AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ170AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ170AQ-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…
