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Diodes Incorporated SMF4L170CAQ-7
- Part No.:
- SMF4L170CAQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L170CAQ-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:2,061
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Product details
Overview
SMF4L170CAQ-7 from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in DO-219AA package, designed for automotive-grade overvoltage protection. It features a 170V working peak reverse voltage (VRWM), 189–209V breakdown voltage (VBR), 275V maximum clamping voltage (VC) at 1.4A surge current, and 400W peak pulse power rating per 10/1000µs waveform - deployed in battery contact and power management circuits requiring AEC-Q101 compliance.
For engineers reviewing the SMF4L170CAQ-7 datasheet, SMF4L170CAQ-7 pinout, SMF4L170CAQ-7 application, or SMF4L170CAQ-7 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, IEC61000-4-2 ESD ratings (±30kV air/contact), thermal resistance (RθJA = 96°C/W), and bi-directional clamping behavior critical for robust automotive ECU and infotainment system design.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with no cathode band marking, enabling bidirectional surge suppression without polarity dependency. Its silicon avalanche structure delivers sub-5ns response time from 0V to VBR min, ensuring fast clamping during ESD or load-dump transients.
Rated for -55°C to +175°C operating temperature and qualified to AEC-Q101, it supports automotive applications under harsh thermal cycling and vibration. The device's 1.0W DC power dissipation and 96°C/W junction-to-ambient thermal resistance are validated on 1"×1" FR-4 PCB with 2 oz. copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 170V - Maximum continuous reverse voltage before clamping initiates; sets safe operating margin above nominal 12V/24V/48V automotive bus voltages. |
| VBR (min/max) | 189V / 209V @ 1mA - Confirmed avalanche onset range; ensures predictable turn-on during fast transients without premature conduction. |
| VC @ IRSM | 275V @ 1.4A - Clamping voltage under 10/1000µs surge; limits downstream IC stress to ≤275V during ISO 7637-2 Pulse 1/2/5a events. |
| PPK | 400W - Peak pulse power handling per standard 10/1000µs waveform; sustains single-event surges without degradation. |
| ESD Rating | ±30kV air / ±30kV contact per IEC61000-4-2 - Protects exposed connectors and interfaces against human-body-model discharges. |
| Operating Temp | -55°C to +175°C - Enables placement near high-temperature engine compartments or power electronics without derating. |
| RθJA | 96°C/W - Thermal resistance on standard FR-4 layout; informs board-level thermal design for sustained surge duty cycles. |
Pinout & Package
Package: DO-219AA - surface-mount, flat lead, green molded plastic (UL 94V-0), 0.016g weight, moisture sensitivity level 1. Cathode band absent, confirming bi-directional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche terminals | No polarity marking; either terminal serves as anode or cathode depending on transient polarity - simplifies PCB layout and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use with PPAP capability and IATF 16949 manufacturing - meets OEM reliability and change-control requirements. |
| Bi-directional clamping | Clamps positive and negative transients equally without external circuitry - reduces BOM count vs. dual uni-directional TVS solutions. |
| Fast response time | <5.0ns from 0V to VBR min - captures nanosecond-scale ESD events before sensitive analog or digital inputs are damaged. |
| Halogen & antimony free | <900ppm Br, <900ppm Cl, <1000ppm Sb - satisfies automotive "Green" material compliance (e.g., GMW3172, Ford WSS-M99P9999-A1). |
| RoHS 3 compliant | Meets EU Directive 2015/863/EU with all applicable exemptions - supports global market access and supply chain traceability. |
Applications
| Automotive Body Control Module (BCM) | Infotainment System Power Input |
|---|---|
Use Scenario: Protects 12V supply rail of BCM microcontrollers and CAN transceivers from load dump and jump-start surges. IC Role / Device Role / Timing Role: Bi-directional TVS clamps both positive and negative transients on unidirectional power input lines. Use Value: Limits clamping voltage to 275V while sustaining 400W pulses - prevents latch-up or burnout of 3.3V/5V LDOs and MCU I/Os. |
Use Scenario: Shields USB-C and HDMI power pins in head unit against ESD and hot-plug transients. IC Role / Device Role / Timing Role: Fast-response bi-directional suppressor placed at connector entry point before EMI filters. Use Value: Delivers ±30kV IEC61000-4-2 protection without signal distortion - preserves high-speed interface integrity up to 10Gbps. |
| Electric Power Steering (EPS) Sensor Interface | ADAS Camera Module Power Rail |
Use Scenario: Guards analog sensor supply (5V/3.3V) feeding torque and position sensors in EPS control units. IC Role / Device Role / Timing Role: Low-leakage TVS (<0.5μA at VRWM) prevents DC bias shift in precision ratiometric sensor bridges. Use Value: Maintains <0.5μA reverse leakage at 170V - avoids sensor offset drift and ADC measurement error in closed-loop steering control. |
Use Scenario: Secures 12V input to image sensor SoC and ISP in surround-view camera modules exposed to engine bay EMI. IC Role / Device Role / Timing Role: High-temp-rated TVS (TJ = +175°C) mounted adjacent to camera power connector. Use Value: Operates reliably at +175°C ambient - enables direct placement on compact camera PCBs without thermal derating penalties. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170CA | DO-214AC package; 170V VRWM; 275V VC @ 1.4A; same 400W PPK but higher RθJA (120°C/W) | Larger footprint (4.5mm × 3.9mm vs. DO-219AA's 2.8mm × 1.9mm); less suitable for space-constrained ADAS modules | Select when legacy SMA footprint compatibility is required and thermal budget allows higher junction rise. |
| TPSMD170C | DO-214AB package; 170V VRWM; 275V VC @ 1.4A; 600W PPK; AEC-Q101 qualified | Higher surge rating but larger size and 100°C/W RθJA; not optimized for ultra-compact automotive modules | Prefer for systems needing higher single-pulse margin (e.g., alternator load dump) where board area permits. |
Compared with SMAJ170CA and TPSMD170C, SMF4L170CAQ-7 offers the smallest footprint (DO-219AA), lowest thermal resistance (96°C/W), and identical clamping performance - making it optimal for next-gen automotive ECUs where space, thermal efficiency, and AEC-Q101 compliance are jointly critical.
Availability
SMF4L170CAQ-7 is available at Aetrix Electronics and suitable for automotive body control modules, infotainment power inputs, electric power steering sensor interfaces, and ADAS camera module power rails requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMF4L170CAQ-7 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 with IATF 16949-certified facilities.
The SMF4L series targets automotive transient protection with AEC-Q101 qualification, green packaging, and optimized DO-219AA footprint - engineered specifically for space-constrained, thermally demanding vehicle subsystems.
FAQ
Is SMF4L170CAQ-7 unidirectional or bidirectional?
SMF4L170CAQ-7 is a bi-directional TVS diode, confirmed by its part number suffix "C" and absence of cathode band marking. It clamps transients of either polarity symmetrically, with identical VBR and VC specifications for positive and negative excursions - ideal for protecting AC-coupled or floating signal lines and non-polarized power inputs.
What is the maximum clamping voltage at rated surge current?
The maximum clamping voltage (VC) is 275V at 1.4A peak pulse current (IRSM), measured under the standard 10/1000µs double-exponential waveform. This value is guaranteed across the full operating temperature range (-55°C to +175°C) and ensures downstream components see no more than 275V during worst-case surge events.
Does SMF4L170CAQ-7 meet automotive qualification standards?
Yes - SMF4L170CAQ-7 is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. It also complies with IEC61000-4-2 ESD immunity (±30kV air/contact) and is halogen/antimony free per automotive green material standards, supporting full OEM compliance documentation packages.
How does the DO-219AA package improve thermal performance over SMA/SMB?
The DO-219AA package delivers lower thermal resistance (RθJA = 96°C/W vs. ~120°C/W for SMAJ) due to its flat lead construction and optimized thermal path to the PCB. Its 2.8mm × 1.9mm footprint enables tighter placement near heat sources like power MOSFETs, and its 0.6mm lead length minimizes inductance - improving high-frequency surge response.
SMF4L170CAQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-219AA
- Series:
- SMF4L
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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 ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AA
SMF4L170CAQ-7 FAQ
1.How can I place an order for SMF4L170CAQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L170CAQ-7 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 SMF4L170CAQ-7 reliable?
The price and inventory of SMF4L170CAQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L170CAQ-7 is usually 5 days.
3.What payment methods are accepted for SMF4L170CAQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L170CAQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L170CAQ-7?
SMF4L170CAQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L170CAQ-7 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 SMF4L170CAQ-7?
For technical support, including SMF4L170CAQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L170CAQ-7 requirements.
6.How does Aetrix verify that SMF4L170CAQ-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L170CAQ-7 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 SMF4L170CAQ-7 meets industry standards.
7.What is the process for return or replacement of SMF4L170CAQ-7?
All SMF4L170CAQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L170CAQ-7, 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 SMF4L170CAQ-7 part is unused and in its original packaging.
Return procedure for SMF4L170CAQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L170CAQ-7 Tags
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