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Taiwan Semiconductor Corporation SMA4F60AH
- Part No.:
- SMA4F60AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA4F60AH.pdf
- Description:
- 400W, 70.6V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,383
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Product details
Overview
SMA4F60AH from Taiwan Semiconductor is a unidirectional, glass-passivated transient voltage suppressor (TVS) diode in Thin SMA package, rated for 60 V working stand-off voltage (VWM), 67.1–74.1 V breakdown voltage (VBR), and 400 W peak pulse power (PPPM) with 97.4 V clamping voltage at 4.1 A peak current. It is AEC-Q101 qualified and used in automotive battery management systems to protect against load dump and ISO 7637-2 transients.
For engineers reviewing the SMA4F60AH datasheet, SMA4F60AH pinout, SMA4F60AH application, or SMA4F60AH equivalent, key selection criteria include unidirectional polarity, 175 °C maximum junction temperature, J-STD-020 Level 1 moisture sensitivity, UL 94V-0 molding compound, and compatibility with 5 mm × 5 mm copper pad PCB layouts for thermal reliability.
Technical Context
This TVS diode operates as a unidirectional overvoltage clamp, leveraging a single silicon die with glass passivation for stable VBR drift (0.095 %/°C). Its 97.4 V clamping voltage at 4.1 A (10/1000 µs waveform) defines its surge-handling capability in DC power rails.
Thermal performance is characterized by RθJL = 20 °C/W and RθJA = 62 °C/W on a 5 mm × 5 mm Cu pad test board. The device sustains 7.5 W steady-state power dissipation and supports operation from –55 °C to +175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 60 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 67.1 V / 74.1 V - Breakdown voltage range at 1 mA test current; ensures consistent turn-on threshold |
| VC @ IPPM | 97.4 V - Clamping voltage at 4.1 A peak pulse current; determines protected circuit's max transient exposure |
| PPPM | 400 W - Peak pulse power handling per 10/1000 µs waveform; validates robustness against ISO 7637-2 Pulse 5a |
| TJ max | +175 °C - Maximum junction temperature; enables under-hood automotive deployment without derating |
| RθJA | 62 °C/W - Junction-to-ambient thermal resistance on standard 5 mm × 5 mm Cu pad; guides heatsinking requirements |
| Polarity | Unidirectional - Blocks reverse voltage only; requires correct cathode orientation in series with positive rail |
Pinout & Package
Package: Thin SMA - Surface-mount, molded plastic case with matte tin-plated leads, UL 94V-0 rated, 0.030 g weight, unidirectional polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction path | Connected to lower-potential side of protected line (e.g., ground or negative rail) |
| Cathode | Output terminal; marked with band | Connected to higher-potential side (e.g., battery+ or supply rail); conducts during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Ensures stable VBR over lifetime and improved humidity resistance vs. epoxy-passivated alternatives |
| VBR temperature coefficient | 0.095 %/°C - Predictable, low-drift breakdown behavior across –55 °C to +175 °C operating range |
| J-STD-020 Level 1 MSL | Zero floor life limitation - can be stored indefinitely before reflow without baking |
| UL 94V-0 molding compound | Self-extinguishing housing material required for automotive under-hood safety compliance |
Applications
| Battery Management System (BMS) | Automotive Lighting Control |
|---|---|
Use Scenario: Protection of 48 V/60 V battery monitoring ICs and cell-balancing circuits against load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery+ and ground, absorbing >400 W transient energy within microseconds. Use Value: Prevents latch-up or destruction of precision analog front-ends during ISO 16750-2 transient events up to ±100 V. | Use Scenario: Surge suppression on LED driver input rails in headlamp modules exposed to alternator ripple and switching noise. IC Role / Device Role / Timing Role: Standoff protection element shunting transients away from buck controller ICs and MOSFET gate drivers. Use Value: Maintains <1 µA leakage at 60 V, avoiding false triggering while clamping 97.4 V spikes to safeguard 65 V-rated components. |
| BLDC Motor Drive Power Stage | Industrial SMPS Input Stage |
Use Scenario: Input-side protection of 60 V-rated gate drivers and current-sense amplifiers in electric power steering (EPS) inverters. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp parallel to DC bus, triggered within nanoseconds of overvoltage onset. Use Value: Withstands repetitive 10/1000 µs pulses up to 4.1 A without degradation, supporting ASIL-B system integrity. | Use Scenario: Primary-side transient suppression in telecom-grade 60 V input AC/DC converters subject to lightning-induced surges. IC Role / Device Role / Timing Role: First-line defense before bridge rectifier and bulk capacitor, limiting voltage seen by primary-side controllers. Use Value: Delivers 400 W peak power rating with 20 °C/W junction-to-lead thermal resistance, enabling reliable operation on minimal copper area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ60A | Same 60 V VWM, but 400 W PPPM achieved at higher IPPM (6.8 A); VC = 96.8 V; RθJA = 65 °C/W | Higher clamping current tolerance; slightly less thermally efficient on same PCB layout | Prefer SMA4F60AH where board space is constrained and thermal resistance must be minimized |
| SMBJ60A | Same VWM/VBR specs, but SMB package (larger footprint, RθJA = 50 °C/W); 600 W PPPM rating | Higher power handling but requires 30% more PCB area; not drop-in compatible | Choose SMBJ60A only when 600 W surge margin is mandatory and layout allows larger package |
Compared with SMAJ60A and SMBJ60A, the SMA4F60AH offers the lowest thermal resistance (62 °C/W) in the smallest footprint (Thin SMA), making it optimal for space-constrained automotive modules requiring AEC-Q101 validation and precise 60 V standoff.
Availability
SMA4F60AH is available at Aetrix Electronics and suitable for automotive battery management systems, BLDC motor drives, industrial SMPS units, and LED lighting control circuits requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SMA4F60AH 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global automotive and industrial certifications.
The SMA4FxxAH series was designed specifically for AEC-Q101-compliant transient protection in 12–60 V automotive subsystems, emphasizing low thermal resistance, tight VBR tolerance, and high-reliability packaging for under-hood deployment.
FAQ
What is the clamping voltage of the SMA4F60AH at its rated peak pulse current?
The SMA4F60AH has a maximum clamping voltage (VC) of 97.4 V at 4.1 A peak pulse current (IPPM) under the 10/1000 µs waveform condition. This value is measured per the manufacturer's electrical specifications table and defines the upper voltage limit imposed on protected circuitry during transient events. The SMA4F60AH maintains this clamping performance across its specified operating temperature range and is validated for repetitive surge duty in automotive environments.
Is the SMA4F60AH suitable for bidirectional transient protection?
No, the SMA4F60AH is a unidirectional TVS diode, as confirmed by its polarity marking (cathode band) and electrical specification table listing only forward voltage (VF) for uni-directional devices. It protects against positive transients on the cathode side relative to anode and cannot suppress negative-going surges. For bidirectional protection, a separate part such as SMA4F60AY (if offered) or a dedicated bi-directional TVS would be required. The SMA4F60AH datasheet explicitly states "Polarity: Uni-directional".
What is the maximum steady-state power dissipation for the SMA4F60AH on a standard PCB layout?
The SMA4F60AH supports 7.5 W steady-state power dissipation when mounted on a 5 mm × 5 mm copper pad test board, per the Absolute Maximum Ratings table. This rating assumes TA = 25 °C and accounts for thermal conduction through leads and ambient convection. Derating is required above 25 °C ambient, following the curve in Figure 2 of the datasheet. The SMA4F60AH's RθJA of 62 °C/W directly informs thermal design margins for continuous power handling.
Does the SMA4F60AH meet RoHS and halogen-free requirements?
Yes, the SMA4F60AH is RoHS compliant and halogen-free per IEC 61249-2-21, as stated in the FEATURES section of the official documentation. Its matte tin-plated leads comply with J-STD-002 solderability standards, and the molding compound meets UL 94V-0 flammability requirements. These qualifications are verified for the Thin SMA package variant and apply specifically to the SMA4F60AH ordering code.
What is the moisture sensitivity level (MSL) rating for the SMA4F60AH?
The SMA4F60AH is rated at Moisture Sensitivity Level 1 per J-STD-020, meaning it has unlimited floor life and does not require dry-packaging or baking prior to reflow soldering. This MSL rating is confirmed in the FEATURES list and applies to the Thin SMA package configuration shipped in tape-and-reel (14,000 units per reel). The SMA4F60AH's Level 1 classification simplifies manufacturing logistics for high-volume automotive assembly lines.
SMA4F60AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- SMA4F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 60V
- Voltage - Breakdown (Min):
- 67.1V
- Voltage - Clamping (Max) @ Ipp:
- 97.4V
- Current - Peak Pulse (10/1000µs):
- 4.1A
- 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:
- Thin SMA
SMA4F60AH FAQ
1.How can I place an order for SMA4F60AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA4F60AH 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 SMA4F60AH reliable?
The price and inventory of SMA4F60AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA4F60AH is usually 5 days.
3.What payment methods are accepted for SMA4F60AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA4F60AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA4F60AH?
SMA4F60AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA4F60AH 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 SMA4F60AH?
For technical support, including SMA4F60AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA4F60AH requirements.
6.How does Aetrix verify that SMA4F60AH is sourced from the original manufacturer or authorized distributors?
All SMA4F60AH 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 SMA4F60AH meets industry standards.
7.What is the process for return or replacement of SMA4F60AH?
All SMA4F60AH units undergo pre-shipment inspection (PSI). If there is an issue with SMA4F60AH, 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 SMA4F60AH part is unused and in its original packaging.
Return procedure for SMA4F60AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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