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Taiwan Semiconductor Corporation SMF60AH
- Part No.:
- SMF60AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
SMF60AH.pdf
- Description:
- TVS DIODE 60VWM 96.8VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:5,767
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Product details
Overview
SMF60AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for automotive-grade circuit protection. It features a 60 V working stand-off voltage (VWM), 66.7–73.7 V breakdown voltage (VBR), 96.8 V clamping voltage (VC) at 1.8 A peak pulse current, and 200 W peak pulse power (10/1000 µs). It is AEC-Q101 qualified and used to protect automotive lighting and ECU power rails against ISO 7637-2 pulses.
For engineers reviewing the SMF60AH datasheet, SMF60AH pinout, SMF60AH application, or SMF60AH equivalent, key selection criteria include clamping performance under 10/1000 µs transients, low leakage (<1 µA @ 60 V), SOD-123W package compatibility with automated assembly, and compliance with automotive surge immunity standards including Pulse 1, 2a, 2b, 3a, and 3b.
Technical Context
The SMF60AH operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to clamp transient overvoltages. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at VWM), critical for low-power automotive sensors and always-on modules.
Thermal design relies on its SOD-123W package with RθJL = 33 °C/W and RθJA = 100 °C/W (on 5 mm × 5 mm Cu pad), enabling reliable operation up to TJ = 175 °C. It meets ISO 7637-2 test profiles without derating below 125 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 60 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min / max | 66.7 V / 73.7 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold consistency |
| VC @ IPPM | 96.8 V - Clamped voltage during 1.8 A 10/1000 µs surge; determines maximum stress on protected IC |
| PPPM | 200 W - Peak pulse power handling per 10/1000 µs waveform; validates robustness against load dump and inductive spikes |
| IR @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; ensures minimal quiescent power loss in battery-sensitive systems |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood placement in automotive ECUs and lighting modules |
| Package | SOD-123W - Surface-mount outline with enhanced thermal pad; compatible with standard reflow and high-speed pick-and-place |
Pinout & Package
SOD-123W is a two-terminal surface-mount package with cathode indicated by a band. The device has no internal pins; terminals are anode (unmarked end) and cathode (banded end). Polarity must be observed during PCB layout to ensure correct reverse-bias clamping orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; completes clamping path during transient events |
| Cathode | High-side transient input | Connected to protected line (e.g., 12 V supply); conducts when voltage exceeds VBR to shunt surge energy |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use across temperature, humidity, and mechanical shock stress tests per JESD22 |
| Glass-passivated junction | Ensures stable VBR over lifetime and resistance to moisture-induced parameter drift in harsh environments |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without failure |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; supports standard SMT assembly without dry-pack handling |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
Applications
| Automotive Lighting Systems | Body Control Modules (BCM) |
|---|---|
Use Scenario: Protecting LED driver ICs and CAN transceivers from load-dump surges during headlight switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V rail and ground to clamp transients before they reach sensitive drivers. Use Value: Limits peak voltage to 96.8 V during 200 W pulses, preventing latch-up or gate oxide damage in 40 V-rated MOSFETs and 5 V logic. | Use Scenario: Safeguarding microcontroller I/O lines and LIN bus transceivers against ESD and electrical fast transients in door modules. IC Role / Device Role / Timing Role: Standoff protection element on 12 V supply input and signal lines, activated only during >66.7 V excursions. Use Value: Sub-1 µA leakage preserves sleep-mode current budget; SOD-123W footprint enables dense layout near connectors. |
| Engine Control Units (ECU) | Infotainment Power Rails |
Use Scenario: Suppressing inductive kickback from fuel injector solenoids and ignition coils connected to ECU output drivers. IC Role / Device Role / Timing Role: Parallel-connected transient clamp on switched 12 V outputs, absorbing energy within 10 µs rise time. Use Value: 200 W rating handles ISO 7637-2 Pulse 1 (−100 V, 50 ms) with margin; 175 °C TJ rating sustains under-hood operation. | Use Scenario: Protecting DC-DC converter inputs and USB power switches from battery line transients during jump-start or alternator regulation faults. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V input stage of buck converters supplying 3.3 V/5 V system rails. Use Value: 60 V VWM allows safe operation during normal 13.5–14.4 V charging; 96.8 V VC prevents downstream regulator overvoltage shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ60A | Same SOD-123 package, but VBR min = 66.7 V, VC = 96.8 V, PPPM = 400 W (higher power rating) | Higher peak power supports longer-duration transients; larger thermal mass may affect board-level thermal response | Preferred where extended surge duration (e.g., ISO 16750-2 Load Dump) requires >200 W margin |
| Vishay SMBJ60A | SMB package (larger footprint), VBR min = 66.7 V, VC = 96.8 V, PPPM = 600 W, RθJA = 50 °C/W | Requires PCB area increase; superior thermal dissipation enables higher average surge duty cycles | Select when board space permits and repeated surge testing (e.g., endurance validation) demands lower junction temperature rise |
Compared with SMAJ60A and SMBJ60A, the SMF60AH offers identical clamping performance in a smaller SOD-123W footprint and lower cost, making it optimal for space-constrained automotive modules where 200 W peak pulse capability suffices and AEC-Q101 qualification is mandatory.
Availability
SMF60AH is available at Aetrix Electronics and suitable for automotive lighting systems, body control modules, and engine control units requiring stable component supply with full traceability and AEC-Q101 conformance.
Supply support for SMF60AH 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 certification capabilities.
The SMF60AH belongs to TSC's SMF-AH series of automotive-grade TVS diodes, engineered specifically for ISO 7637-2-compliant transient suppression in 12 V and 24 V vehicle electrical systems.
FAQ
What is the clamping voltage of the SMF60AH under a 10/1000 µs transient?
The SMF60AH has a maximum clamping voltage (VC) of 96.8 V when subjected to its rated peak pulse current of 1.8 A with a 10/1000 µs waveform. This value is measured per JEDEC standards and ensures protected downstream components experience no more than 96.8 V during surge events. The SMF60AH maintains this clamping performance across its specified junction temperature range of −55 °C to +175 °C.
Is the SMF60AH suitable for 24 V automotive systems?
Yes, the SMF60AH is suitable for 24 V nominal systems, as its 60 V working stand-off voltage provides adequate margin above typical 24 V rail transients (e.g., up to ~36 V during regulation). Its 96.8 V clamping voltage remains within safe limits for 100 V-rated downstream components. However, for systems requiring higher VWM (e.g., 36 V or 40 V), SMF70AH or SMF75AH variants are recommended instead of the SMF60AH.
Does the SMF60AH meet AEC-Q101 requirements for automotive use?
Yes, the SMF60AH is explicitly AEC-Q101 qualified per the manufacturer's datasheet (Version A2103). It has passed stress tests including high-temperature operating life, temperature cycling, humidity bias HAST, and mechanical shock-validating its reliability in automotive under-hood and cabin environments. This qualification applies directly to the SMF60AH, not just the family.
What is the reverse leakage current of the SMF60AH at its rated VWM?
The SMF60AH exhibits a maximum reverse leakage current (IR) of 1 µA when biased at its 60 V working stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage preserves battery standby current in always-on automotive modules such as alarm controllers and telematics units. Leakage remains below 5 µA up to 125 °C ambient, as confirmed in thermal derating curves.
Can the SMF60AH replace SMAJ60A in existing designs?
The SMF60AH is not a direct drop-in replacement for SMAJ60A due to differing package outlines-SMAJ60A uses SMA (DO-214AC), while SMF60AH uses SOD-123W. Though both share identical VWM, VBR, and VC values, the SOD-123W footprint requires PCB layout revision. For new designs prioritizing miniaturization and AEC-Q101 compliance, the SMF60AH is preferred; legacy SMA layouts should retain SMAJ60A unless re-spinning.
SMF60AH 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):
- 60V
- Voltage - Breakdown (Min):
- 66.7V
- Voltage - Clamping (Max) @ Ipp:
- 96.8V
- Current - Peak Pulse (10/1000µs):
- 1.8A
- 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
SMF60AH FAQ
1.How can I place an order for SMF60AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF60AH 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 SMF60AH reliable?
The price and inventory of SMF60AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF60AH is usually 5 days.
3.What payment methods are accepted for SMF60AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF60AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF60AH?
SMF60AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF60AH 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 SMF60AH?
For technical support, including SMF60AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF60AH requirements.
6.How does Aetrix verify that SMF60AH is sourced from the original manufacturer or authorized distributors?
All SMF60AH 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 SMF60AH meets industry standards.
7.What is the process for return or replacement of SMF60AH?
All SMF60AH units undergo pre-shipment inspection (PSI). If there is an issue with SMF60AH, 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 SMF60AH part is unused and in its original packaging.
Return procedure for SMF60AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF60AH Tags
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