My Inquiry
My Account
Taiwan Semiconductor Corporation SMF58AH
- Part No.:
- SMF58AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
SMF58AH.pdf
- Description:
- TVS DIODE 58VWM 95VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:4,522
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMF58AH from Taiwan Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for automotive-grade circuit protection. It features a 58 V working stand-off voltage (VWM), 64.4–71.2 V breakdown voltage (VBR), 95 V clamping voltage (VC) at 2.1 A peak pulse current, and 200 W peak pulse power capability with a 10/1000 µs waveform-ideal for protecting automotive lighting and ECU power rails against ISO 7637-2 pulses.
For engineers reviewing the SMF58AH datasheet, SMF58AH pinout, SMF58AH application, or SMF58AH equivalent, key selection criteria include clamping performance under Pulse 1/2a/2b/3a/3b transients, AEC-Q101 qualification status, SOD-123W package thermal resistance (RθJL = 33 °C/W), and low reverse leakage (<1 µA @ 58 V).
Technical Context
The SMF58AH operates as a unidirectional avalanche diode, activated when reverse voltage exceeds its specified VBR range (64.4–71.2 V). Its clamping action limits transient-induced overvoltage to ≤95 V at 2.1 A, enabling robust protection of downstream 58 V-rated systems without forward conduction during normal operation.
Designed per AEC-Q101 and compliant with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b, it supports automotive applications requiring high-reliability transient immunity. The SOD-123W package provides low thermal resistance (RθJA = 100 °C/W on 5 mm × 5 mm Cu pad) and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR @ IT = 1 mA | 64.4–71.2 V - Confirmed avalanche onset range ensuring reliable turn-on margin above VWM |
| VC @ IPPM = 2.1 A | 95 V - Clamped voltage during 10/1000 µs transient, defining maximum stress on protected IC |
| PPPM | 200 W - Peak pulse power handling capacity per IEC 61000-4-5 / ISO 7637-2 standard waveforms |
| IR @ VWM | <1 µA - Negligible leakage current preserving system efficiency in standby or low-power modes |
| TJ max | +175 °C - Enables operation in under-hood automotive environments without derating |
| Package | SOD-123W - Surface-mount outline with matte tin-plated leads, UL 94V-0 molding, and polarity band marking |
Pinout & Package
SMF58AH uses the SOD-123W package: a compact, gull-wing surface-mount case with cathode-indicating band, 0.016 g mass, and JEDEC-compliant lead finish (solderable per J-STD-002). Thermal performance is characterized on a 5 mm × 5 mm copper pad PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., ground or return rail) in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., 58 V supply rail); conducts only during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, mechanical shock, and humidity testing per stress test requirements |
| ISO 7637-2 compliance | Guaranteed immunity to standardized vehicle electrical transients (Pulse 1, 2a, 2b, 3a, 3b) without failure or parameter shift |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected ICs |
| Photo glass passivated junction | Enhances long-term reliability and moisture resistance versus standard silicon junctions in harsh automotive environments |
| J-STD-020 MSL Level 1 | Zero floor life limitation-no baking required prior to reflow, supporting standard SMT assembly processes |
Applications
| Automotive Lighting Systems | Body Control Modules (BCM) |
|---|---|
Use Scenario: Protecting LED driver ICs and CAN transceivers from load-dump and inductive switching transients in headlamp/tail lamp assemblies. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 58 V supply rail and ground to clamp transients before they reach sensitive drivers. Use Value: Limits clamped voltage to 95 V, staying below absolute maximum ratings of 100 V automotive-grade drivers while maintaining <1 µA leakage at nominal bias. | Use Scenario: Safeguarding microcontroller I/O lines and LIN bus transceivers against ESD and EFT events in door modules and seat controllers. IC Role / Device Role / Timing Role: Low-capacitance TVS deployed on signal lines adjacent to MCU pins to suppress fast-rising transients without signal distortion. Use Value: Achieves sub-1 µA leakage at 58 V and clamps ESD pulses within nanoseconds, preserving signal integrity on 12–24 V subsystem buses. |
| Engine Control Units (ECU) | Power Distribution Units (PDU) |
Use Scenario: Shielding sensor interface circuits (e.g., pressure, temperature) from coupled noise and battery reversal spikes in engine bay environments. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across sensor supply inputs to absorb repetitive low-energy transients without degradation. Use Value: Withstands 175 °C junction temperature and maintains stable VBR over 1000+ transient cycles per ISO 7637-2, ensuring longevity in high-temperature zones. | Use Scenario: Protecting solid-state relay control inputs and fuse-monitoring circuits from load dump surges during battery disconnect/reconnect events. IC Role / Device Role / Timing Role: High-power TVS placed at main 58 V input stage to divert up to 200 W transient energy away from monitoring ICs and MOSFET gates. Use Value: Delivers 200 W peak pulse rating with 33 °C/W junction-to-lead thermal resistance, enabling rapid heat dissipation into PCB copper during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ58A | Same SOD-123 package, 58 V VWM, but higher VC = 93.6 V @ 2.13 A; RθJA = 110 °C/W | Marginally tighter clamping but reduced thermal performance on identical PCB layout | Prefer where lower clamping voltage is critical and board-level thermal design allows for higher RθJA |
| Vishay SMBJ58A | SMB package (larger footprint), 58 V VWM, VC = 93.6 V @ 2.13 A, RθJA = 65 °C/W, AEC-Q101 qualified | Requires PCB redesign due to different pad layout and higher mounting height; better thermal dissipation | Select when higher steady-state power handling (1 W vs. SMF58AH's 1 W) and improved thermal margin outweigh space constraints |
Compared with SMAJ58A and SMBJ58A, SMF58AH offers optimal balance of AEC-Q101 compliance, SOD-123W space efficiency, and 33 °C/W junction-to-lead thermal resistance-making it preferred for dense automotive PCBs where thermal coupling to copper is tightly controlled.
Availability
SMF58AH is available at Aetrix Electronics and suitable for automotive lighting systems, body control modules, and engine control units requiring stable component supply, AEC-Q101 qualification, and ISO 7637-2 transient immunity.
Supply support for SMF58AH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers, with global distribution and AEC-Q101 validation capabilities.
The SMF58AH belongs to TSC's SMF-AH series of automotive-grade TVS diodes, engineered specifically for high-reliability transient suppression in 12 V, 24 V, and 48 V vehicle electrical architectures.
FAQ
What is the clamping voltage of SMF58AH at its rated peak pulse current?
The SMF58AH has a maximum clamping voltage (VC) of 95 V at a peak pulse current (IPPM) of 2.1 A with a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 and ISO 7637-2 standards and ensures protected circuits remain within safe voltage margins during automotive transients. The SMF58AH achieves this clamping performance while maintaining low leakage and AEC-Q101 qualification.
Is SMF58AH suitable for 48 V automotive systems?
Yes, SMF58AH is explicitly designed for 48 V mild-hybrid and commercial vehicle architectures. Its 58 V working stand-off voltage provides appropriate margin above nominal 48 V rail, and its 95 V clamping voltage stays well below typical 100 V absolute maximum ratings of 48 V system ICs. The SMF58AH also meets ISO 7637-2 Pulse 1/2a/2b/3a/3b requirements critical for 48 V network robustness.
Does SMF58AH require special handling during PCB assembly?
No, SMF58AH is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no dry pack or baking prior to reflow soldering. Its matte tin-plated leads comply with J-STD-002 for solderability, and the SOD-123W package supports standard automated placement. The SMF58AH is optimized for high-yield, high-volume automotive manufacturing without process deviations.
How does SMF58AH compare to standard SMAJ58A in terms of thermal performance?
SMF58AH delivers superior thermal coupling with a junction-to-lead resistance (RθJL) of 33 °C/W versus SMAJ58A's typical 40–45 °C/W. On a 5 mm × 5 mm copper pad, this enables faster heat transfer from the die to the PCB, improving surge survivability under repeated transients. The SMF58AH maintains this advantage while retaining identical SOD-123W footprint and AEC-Q101 qualification-key for drop-in reliability upgrades.
What is the reverse leakage current specification for SMF58AH at its working voltage?
SMF58AH specifies a maximum reverse leakage current (IR) of less than 1 µA at its full working stand-off voltage of 58 V, measured at TA = 25°C. This ultra-low leakage preserves system efficiency in always-on automotive modules and prevents unintended current paths in high-impedance sensor interfaces. The SMF58AH achieves this while sustaining full AEC-Q101 stress qualification and ISO 7637-2 immunity.
SMF58AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- SOD-123W
- Series:
- SMF
- 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:
- 95V
- Current - Peak Pulse (10/1000µs):
- 2.1A
- Power - Peak Pulse:
- 200W
- 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:
- SOD-123W
SMF58AH FAQ
1.How can I place an order for SMF58AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF58AH 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 SMF58AH reliable?
The price and inventory of SMF58AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF58AH is usually 5 days.
3.What payment methods are accepted for SMF58AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF58AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF58AH?
SMF58AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF58AH 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 SMF58AH?
For technical support, including SMF58AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF58AH requirements.
6.How does Aetrix verify that SMF58AH is sourced from the original manufacturer or authorized distributors?
All SMF58AH 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 SMF58AH meets industry standards.
7.What is the process for return or replacement of SMF58AH?
All SMF58AH units undergo pre-shipment inspection (PSI). If there is an issue with SMF58AH, 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 SMF58AH part is unused and in its original packaging.
Return procedure for SMF58AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF58AH 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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 …
