My Inquiry
My Account
Diodes Incorporated SMF4L58A-7
- Part No.:
- SMF4L58A-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-219AA
- Datasheet:
-
SMF4L58A-7.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMF4L58A-7 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 58V working peak reverse voltage (VRWM), 64.4–71.2V breakdown range (VBR), 93.6A maximum peak pulse current (IPP), and clamps to ≤121V at 93.6A, making it suitable for automotive power supply input protection.
For engineers reviewing the SMF4L58A-7 datasheet, SMF4L58A-7 pinout, SMF4L58A-7 application, or SMF4L58A-7 equivalent, key selection criteria include clamping voltage margin vs. system rail tolerance, IEC 61000-4-2 ±30kV ESD capability, DO-219AA footprint compatibility, and unidirectional polarity for DC-biased protection paths.
Technical Context
This TVS operates as a silicon avalanche diode with fast response (<1.0ns rise time from 0V to VBR), triggered by transient overvoltage exceeding its breakdown threshold. Its unidirectional configuration allows conduction only during reverse-polarity surges while blocking forward leakage under normal operation.
It is rated for 400W peak pulse power (10/1000µs waveform), 1.0W steady-state dissipation, and operates across –55°C to +175°C. Thermal resistance junction-to-ambient is 96°C/W on standard FR-4 PCB layout, enabling reliable surge handling in compact automotive and industrial modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 58V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit's nominal DC rail. |
| VBR (min/max) | 64.4V / 71.2V @ 1mA - Confirmed avalanche onset range; ensures predictable turn-on within 10% tolerance of VRWM. |
| VC (max) | 121V @ 93.6A - Clamping voltage under full-rated surge; defines worst-case voltage seen by downstream ICs during ESD/EFT events. |
| IPP (max) | 93.6A - Peak surge current capability per 10/1000µs waveform; supports high-energy transients like ISO 7637-2 Pulse 1/2a in automotive systems. |
| IR (max) | 0.5µA @ 58V - Reverse leakage at VRWM; negligible power loss and minimal impact on battery-powered or low-quiescent circuits. |
| ESD Rating | ±30kV air / ±30kV contact per IEC 61000-4-2 - Full Level 4 ESD immunity without external series impedance; enables direct port-level protection. |
| Package | DO-219AA - 2.8mm × 1.9mm surface-mount outline with cathode band marking; compatible with automated SMT assembly and IPC-7351B land patterns. |
Pinout & Package
DO-219AA package: ultra-compact, flat-lead, single-diode configuration with cathode band indicating the cathode terminal. Molded green compound (UL 94V-0), matte tin-plated copper alloy leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive reference node for unidirectional clamping | Connected to protected line (e.g., 48V battery rail); conducts surge current toward ground when reverse voltage exceeds VBR. |
| Cathode | Clamping output node | Connected to system ground; establishes clamping path and defines polarity; marked by visible cathode band on top surface. |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power (10/1000µs) | Enables protection against high-energy transients such as load dump (ISO 7637-2 Pulse 5a) in 12V/24V/48V automotive systems without derating. |
| Fast response time <1.0ns | Prevents voltage overshoot beyond VC before protection activates-critical for safeguarding sensitive CAN, LIN, or MCU I/O pins. |
| IEC 61000-4-2 ±30kV ESD rating | Eliminates need for additional ESD stages in USB, sensor, or button interface designs; meets automotive EMC requirements out-of-box. |
| RoHS-compliant, halogen-free "Green" construction | Meets global environmental compliance mandates (EU RoHS 3, JIS C 0950) and supports automotive PPAP documentation for Tier 1 suppliers. |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 48V mild-hybrid vehicle battery input to DC-DC converter. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and converter input capacitor to clamp load-dump spikes and ISO 7637-2 pulses. Use Value: Limits transient voltage to ≤121V, preventing damage to 150V-rated MOSFETs and gate drivers in the converter stage. | Use Scenario: Analog temperature sensor (e.g., TMP235) connected to long harness in factory automation PLC. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to absorb induced EFT bursts and electrostatic discharges from operator contact. Use Value: Maintains sensor accuracy by suppressing transients before they couple into 12-bit ADC inputs, avoiding offset drift or latch-up. |
| USB-C Port ESD Protection | Smart Meter Battery Backup Line Protection |
Use Scenario: VBUS line of USB-C receptacle in portable medical device. IC Role / Device Role / Timing Role: Primary ESD clamp on 5V/9V/15V/20V VBUS, positioned upstream of USB PD controller and load switch. Use Value: Withstands ±30kV contact discharge without degradation, preserving PD negotiation integrity and preventing brownout resets. | Use Scenario: 3.6V lithium-thionyl chloride backup battery connection to real-time clock (RTC) in utility smart meter. IC Role / Device Role / Timing Role: Low-leakage (0.5µA max) TVS guarding RTC power domain against ESD during field servicing or battery replacement. Use Value: Prevents RTC data corruption or reset by limiting surge-induced voltage excursions while adding negligible standby current drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58A | Same VRWM (58V) and VC (121V), but lower IPP (64.5A) and larger SMA package (4.5×2.7mm). | Less suitable for high-surge environments like automotive load dump; requires more PCB area. | Select when legacy SMA footprint is fixed and surge energy is limited to ≤250W. |
| SMF4L58CA | Bidirectional variant with identical VRWM, VBR, and VC specs; symmetrical clamping for AC-coupled or floating signal lines. | Required for differential bus protection (e.g., RS-485) where polarity reversal occurs; not usable on DC-biased rails. | Choose only when protecting bidirectional signals or ungrounded interfaces; avoid for DC power rails. |
Compared with SMAJ58A and SMF4L58CA, SMF4L58A-7 delivers higher surge current headroom in a 40% smaller footprint and is optimized for space-constrained DC power protection-making it the preferred choice for next-gen automotive ECUs and compact industrial controllers.
Availability
SMF4L58A-7 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface design, and USB-C ESD protection requiring stable component supply and AEC-Q qualified sourcing.
Supply support for SMF4L58A-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 protection, power management, and signal integrity solutions for automotive, industrial, and computing markets.
The SMF4LxxA series belongs to Diodes' high-power, low-profile TVS portfolio engineered specifically for AEC-Q200-compliant automotive subsystems and space-sensitive industrial electronics demanding robust transient immunity.
FAQ
What is the polarity configuration of SMF4L58A-7 and how is it identified?
SMF4L58A-7 is a unidirectional TVS diode, meaning it clamps only reverse-polarity transients and blocks forward current under normal bias. Polarity is indicated by a visible cathode band on the top surface of the DO-219AA package-this band aligns with the cathode terminal, which must be connected to ground in standard protection configurations.
Does SMF4L58A-7 meet AEC-Q200 requirements for automotive use?
Yes-SMF4L58A-7 is manufactured in IATF 16949-certified facilities and qualified to AEC-Q200 standards for passive components. It undergoes stress testing including temperature cycling, humidity bias, and surge endurance per the specification, supporting use in engine control units, body electronics, and ADAS power domains without additional qualification.
How does the DO-219AA package compare thermally to SMA or SMC packages?
The DO-219AA package offers superior thermal performance per unit area: its RθJA is 96°C/W (vs. ~120°C/W for SMA), due to low-profile construction and efficient heat spreading through the cathode tab. When mounted on 2 oz. copper with recommended pad layout, it achieves 14°C/W junction-to-lead resistance-enabling higher sustained surge duty cycles than larger packages at equivalent power levels.
Can SMF4L58A-7 be used in parallel for higher current handling?
No-parallel connection of TVS diodes is not recommended due to mismatched VBR tolerances (±5–10%), which causes uneven current sharing and potential thermal runaway. For higher IPP, select a single device with matching VRWM but higher rating (e.g., SMF4L60A-7, IPP = 96.8A) or consult Diodes' application note AN-2001 for staged protection architectures.
SMF4L58A-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):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 4.3A
- 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
SMF4L58A-7 FAQ
1.How can I place an order for SMF4L58A-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF4L58A-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 SMF4L58A-7 reliable?
The price and inventory of SMF4L58A-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF4L58A-7 is usually 5 days.
3.What payment methods are accepted for SMF4L58A-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF4L58A-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF4L58A-7?
SMF4L58A-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF4L58A-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 SMF4L58A-7?
For technical support, including SMF4L58A-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF4L58A-7 requirements.
6.How does Aetrix verify that SMF4L58A-7 is sourced from the original manufacturer or authorized distributors?
All SMF4L58A-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 SMF4L58A-7 meets industry standards.
7.What is the process for return or replacement of SMF4L58A-7?
All SMF4L58A-7 units undergo pre-shipment inspection (PSI). If there is an issue with SMF4L58A-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 SMF4L58A-7 part is unused and in its original packaging.
Return procedure for SMF4L58A-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF4L58A-7 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…
