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Diodes Incorporated SMF4L150A-7
- Part No.:
- SMF4L150A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L150A-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:5,417
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Product details
Overview
SMF4L150A-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) designed for robust overvoltage clamping in DC power rails and signal lines. It features a 150V working peak reverse voltage (VRWM), 167–185V breakdown voltage (VBR), 243V maximum clamping voltage (VC) at 1.0A surge, and IEC61000-4-2 ±30kV ESD protection - deployed in automotive battery interfaces and industrial power supply inputs.
For engineers reviewing the SMF4L150A-7 datasheet, SMF4L150A-7 pinout, SMF4L150A-7 application, or SMF4L150A-7 equivalent, key selection criteria include clamping performance under 10/1000µs transients, DO-219AA package thermal resistance (RθJA = 96°C/W), unidirectional polarity confirmation via cathode band marking, and compliance with AEC-Q200-referenced reliability standards.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (167–185V), it avalanches to divert surge current away from downstream circuitry. Its fast response (<1.0ns rise time) ensures protection before sensitive ICs experience overstress.
Designed for single-pulse 10/1000µs waveform handling up to 400W, it sustains 1.0A reverse surge current (IRSM) with <1.6µA leakage at VRWM and maintains stable clamping up to TJ = +175°C - validated per JEDEC high-reliability standards and compatible with lead-free reflow profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 150V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC rail margin. |
| VBR (min/max) | 167V / 185V @ 1mA - Confirmed avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC (max) | 243V @ 1.0A - Peak clamped voltage during 10/1000µs surge; determines maximum stress on protected load. |
| PPK | 400W - Peak pulse power rating for 10/1000µs waveform; sets absolute transient energy handling limit. |
| IR (max) | 1.6µA @ VRWM - Low leakage preserves efficiency in high-impedance bias networks and battery-critical circuits. |
| ESD Rating | ±30kV contact & air per IEC61000-4-2 - Validates immunity to human-body-model electrostatic discharge events. |
| RθJA | 96°C/W - Junction-to-ambient thermal resistance on 1"×1" FR-4 board; enables thermal design for sustained surge duty. |
Pinout & Package
Package: DO-219AA - ultra-compact surface-mount molded plastic case (2.80mm × 1.90mm × 0.60mm), halogen/antimony-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; forms shunt path with cathode during overvoltage. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., battery+, CAN_H); marked by visible cathode band on top surface. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation in compact DO-219AA footprint. |
| 1.0ns response time (unidirectional) | Clamps within 1 nanosecond of overvoltage onset - faster than most microcontroller GPIO response times. |
| ±30kV IEC61000-4-2 ESD protection | Eliminates need for external ESD diodes in USB, LIN, or sensor interface designs meeting automotive EMC requirements. |
| DO-219AA package thermal performance | RθJC = 18°C/W enables direct heat sinking to PCB copper; supports >1000 cycles of 400W pulses with <5% parameter shift. |
| AEC-Q200 referenced qualification | Manufactured in IATF 16949-certified facilities; meets high-reliability screening per JEDEC standards for automotive and industrial use. |
Applications
| Automotive Battery Protection | Industrial Power Input Stage |
|---|---|
|
Use Scenario: 12V/24V vehicle battery feed to body control module (BCM) and infotainment head units. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery+ and ground, clamping load dump spikes (ISO 7637-2 Pulse 5a) and jump-start surges. Use Value: Limits clamped voltage to ≤243V, protecting 36V-rated DC-DC converters and MCU power supplies without derating. |
Use Scenario: 48V DC input to programmable logic controller (PLC) power supply with long cable runs. IC Role / Device Role / Timing Role: Primary transient suppressor at front-end rectifier output, absorbing inductive switching noise and lightning-induced surges. Use Value: Withstands 1.0A 10/1000µs transients while maintaining <1.6µA leakage - avoids standby power loss in always-on industrial systems. |
| USB-C Port ESD Protection | RS-485 Transceiver Interface |
|
Use Scenario: VBUS line protection in automotive USB-C charging ports exposed to hot-plug and ESD events. IC Role / Device Role / Timing Role: Secondary clamping device downstream of primary fuse, activated only during ±30kV ESD strikes per IEC61000-4-2. Use Value: Sub-1ns response prevents ESD-induced latch-up in USB PD controllers; DO-219AA footprint fits tight 0.5mm pitch routing. |
Use Scenario: Data line protection for RS-485 transceivers in factory automation networks with shared ground loops. IC Role / Device Role / Timing Role: Bidirectional-capable variant (SMF4L150CA-7) used across differential pair; unidirectional version applied to common-mode rail. Use Value: Clamping voltage ≤243V ensures transceiver common-mode range (±12V) remains intact during 1kV EFT bursts (IEC61000-4-4). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150A | Same VRWM (150V) and VC (243V), but SMA package (larger footprint, RθJA = 100°C/W, PPK = 400W) | Less suitable for space-constrained automotive modules; higher thermal resistance limits high-frequency surge repetition. | Select SMAJ150A only if legacy board layout prohibits DO-219AA rework or requires higher mechanical robustness. |
| SMCJ150A | Higher PPK (1500W), same VRWM/VC, but SMC package (7.11mm × 6.22mm); RθJA = 15°C/W | Over-specified for 400W needs; occupies >5× PCB area; used where multi-pulse endurance or extreme thermal cycling is required. | Choose SMCJ150A only when system-level testing confirms >500W surge exposure or extended thermal cycling beyond 1000 cycles. |
Compared with SMAJ150A and SMCJ150A, SMF4L150A-7 delivers identical clamping performance in a 60% smaller footprint and 4% lower thermal resistance than SMAJ150A - making it optimal for next-gen automotive ECUs and compact industrial power modules where board space and thermal headroom are constrained.
Availability
SMF4L150A-7 is available at Aetrix Electronics and suitable for automotive battery management, industrial PLC power inputs, and USB-C ESD protection requiring stable component supply and AEC-Q200-aligned reliability.
Supply support for SMF4L150A-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q standards.
The SMF4L series belongs to Diodes' high-reliability TVS portfolio engineered specifically for automotive and industrial environments where compact size, fast response, and repeatable clamping under thermal stress are critical.
FAQ
What is the polarity configuration of SMF4L150A-7?
SMF4L150A-7 is a unidirectional TVS diode, confirmed by its cathode band marking on the DO-219AA package top surface. It conducts only during reverse-biased overvoltage events - forward conduction is blocked above ~3V, making it unsuitable for bidirectional signal line protection without pairing.
Does SMF4L150A-7 meet AEC-Q200 requirements?
SMF4L150A-7 is manufactured in IATF 16949-certified facilities and qualified to JEDEC high-reliability standards referenced in AEC-Q200. While not a formal AEC-Q200-graded part (which requires Q-suffix), it is explicitly designated for automotive applications requiring PPAP capability and change-controlled production.
How does the DO-219AA package affect thermal performance?
The DO-219AA package delivers RθJA = 96°C/W on standard FR-4 (1"×1", 2 oz Cu), RθJC = 18°C/W, and RθJS = 70°C/W - enabling efficient heat transfer to the PCB. Its low mass (0.016g) and optimized thermal path allow repeated 400W surges without junction temperature exceeding 175°C when mounted per recommended pad layout.
Can SMF4L150A-7 replace SMF4L150CA-7 in bidirectional applications?
No - SMF4L150A-7 is unidirectional and lacks symmetrical clamping. The CA suffix denotes bidirectional construction (no cathode band). Substituting it in AC-coupled or differential bus applications (e.g., RS-485) would result in forward conduction during normal signal swings and failure to clamp negative transients.
SMF4L150A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 243V
- Current - Peak Pulse (10/1000µs):
- 1.6A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AA
SMF4L150A-7 FAQ
1.How can I place an order for SMF4L150A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L150A-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 SMF4L150A-7 reliable?
The price and inventory of SMF4L150A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L150A-7 is usually 5 days.
3.What payment methods are accepted for SMF4L150A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L150A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L150A-7?
SMF4L150A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L150A-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 SMF4L150A-7?
For technical support, including SMF4L150A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L150A-7 requirements.
6.How does Aetrix verify that SMF4L150A-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L150A-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 SMF4L150A-7 meets industry standards.
7.What is the process for return or replacement of SMF4L150A-7?
All SMF4L150A-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L150A-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 SMF4L150A-7 part is unused and in its original packaging.
Return procedure for SMF4L150A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L150A-7 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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