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Taiwan Semiconductor Corporation 1.5SMC75A
- Part No.:
- 1.5SMC75A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC75A.pdf
- Description:
- TVS DIODE 64.1VWM 103VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,817
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Product details
Overview
1.5SMC75A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power lines and signal paths. It features a 71.3–78.8 V breakdown voltage (VBR), 64.1 V working stand-off voltage (VWM), 15 A peak impulse current (IPPM), 103 V maximum clamping voltage (VC), and 1500 W peak pulse power (PPK) at 1 ms - deployed in telecom front-end surge protection, industrial I/O interfaces, and automotive body control modules.
For engineers reviewing the 1.5SMC75A datasheet, 1.5SMC75A pinout, 1.5SMC75A application, or 1.5SMC75A equivalent, key selection criteria include clamping performance under 10/1000 µs surge, leakage current ≤1 µA at 64.1 V, thermal resistance (RθJA = 50 °C/W), DO-214AB package compatibility, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b.
Technical Context
The 1.5SMC75A operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-1 ps response time and stable clamping during fast transients. Its single-die DO-214AB construction supports automated placement and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
Designed for non-repetitive surge suppression, it delivers 103 V clamping at 15 A (10/1000 µs waveform), with junction temperature rated from –55 °C to +150 °C and thermal resistance of 15 °C/W from junction-to-case. Steady-state power dissipation is 6.5 W at 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1 mA | 71.3–78.8 V - ensures reliable avalanche initiation above system operating voltage while avoiding false triggering |
| VWM | 64.1 V - maximum continuous reverse voltage the device blocks without significant leakage |
| VC @ IPPM = 15 A | 103 V - peak voltage seen by protected circuit during worst-case 10/1000 µs surge |
| PPK | 1500 W - surge energy handling capacity per single 1 ms pulse, derated above 25 °C |
| IR @ VWM | ≤1 µA - minimal leakage preserves signal integrity and low-power standby operation |
| RθJA | 50 °C/W - defines thermal rise under sustained power dissipation; requires adequate PCB copper area for heatsinking |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with cathode band marking and 0.210 g mass |
Pinout & Package
DO-214AB (SMC) package: molded epoxy case meeting UL 94V-0, matte tin-plated leads solderable per J-STD-002, polarity indicated by cathode band. Weight: 0.210 g. Moisture sensitivity level: J-STD-020 Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / surge return node | Connected to ground or low-impedance return path; carries full surge current during clamping |
| Cathode | Protected line connection / high-side terminal | Connected to the line being protected (e.g., 48 V rail); reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| Clamping voltage ≤103 V at 15 A | Provides predictable overvoltage limiting margin for 64 V systems (e.g., telecom -48 V DC with ripple) |
| Response time <1.0 ps | Ensures suppression before sensitive downstream ICs (e.g., RS-485 transceivers, microcontrollers) experience damaging voltage overshoot |
| ISO 7637-2 compliant | Validated for automotive load-dump and supply transients (Pulse 1, 2a, 2b, 3a, 3b) without external filtering |
| RoHS & halogen-free | Meets IEC 61249-2-21 and environmental compliance requirements for industrial and automotive end equipment |
Applications
| Telecom Power Input Protection | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting -48 V DC input stages of base station power supplies and optical line terminals against lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary unidirectional TVS clamp placed directly at connector entry, upstream of DC-DC converters and monitoring ICs. Use Value: Limits transient voltage to ≤103 V, preserving integrity of 75 V-rated input capacitors and enabling use of lower-cost 100 V MOSFETs in front-end stages. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Standoff protector across input terminals, absorbing repetitive 10/1000 µs pulses up to 15 A without degradation. Use Value: Eliminates need for series resistors or RC snubbers, reducing BOM count while maintaining <1 µA leakage for accurate 24 V logic-level detection. |
| Automotive Body Control Module | Medical Equipment Power Rails |
Use Scenario: Suppressing load-dump transients on 12 V battery-fed circuits in BCMs (e.g., mirror control, seat actuation) per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at fuse box interface, clamping surges before they reach MCU GPIOs and CAN transceivers. Use Value: Withstands 1500 W peak power and maintains VC ≤103 V, ensuring MCU reset thresholds (typically 12–14 V) are not exceeded during 35 V/100 ms load dump events. | Use Scenario: Guarding isolated 24 V auxiliary power rails in diagnostic imaging subsystems (e.g., ultrasound beamformer supplies) against ESD and EFT bursts. IC Role / Device Role / Timing Role: Secondary protection stage after primary isolation, placed adjacent to LDO inputs to prevent latch-up in analog front-end ICs. Use Value: Sub-1 µA leakage at 64.1 V prevents loading of precision reference voltages; DO-214AB footprint allows placement within tight spacing constraints near sensitive ADCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A (Bourns) | Same DO-214AA package; 75 V VBR min/max tighter (71.3–78.8 V vs. 71.3–77.9 V); 103 V VC identical; RθJA = 55 °C/W | Higher thermal resistance limits sustained surge duty cycle; same ISO 7637-2 compliance | Select SMBJ75A only if DO-214AA board footprint is fixed and thermal derating margins allow |
| 1.5KE75A (ON Semiconductor) | Through-hole DO-15 package; identical VBR, VWM, VC, PPK; RθJA = 60 °C/W; no J-STD-020 rating | Not suitable for automated SMT assembly; requires wave soldering or hand assembly; incompatible with high-density layouts | Choose 1.5KE75A only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ75A and 1.5KE75A, the 1.5SMC75A offers superior thermal performance (RθJA = 50 °C/W), J-STD-020 Level 1 moisture resistance for lead-free reflow, and DO-214AB mechanical robustness - making it optimal for high-volume SMT production in automotive and industrial environments.
Availability
1.5SMC75A is available at Aetrix Electronics and suitable for telecom power input protection, industrial PLC digital I/O hardening, and automotive body control module surge suppression requiring stable component supply, consistent parametric performance, and full traceability.
Supply support for 1.5SMC75A 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, rectifiers, and MOSFETs for industrial, automotive, and consumer markets.
The 1.5SMCxxA series was engineered specifically for high-reliability surface-mount surge protection in space-constrained, high-surge-environment applications - emphasizing low clamping voltage, fast response, and robust thermal design in the DO-214AB package.
FAQ
What is the maximum clamping voltage of the 1.5SMC75A under standard 10/1000 µs surge conditions?
The 1.5SMC75A exhibits a maximum clamping voltage (VC) of 103 V when subjected to a 15 A peak impulse current with a 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and represents the highest voltage the protected circuit will experience during a standardized surge event - critical for ensuring downstream components remain within their absolute maximum ratings.
Is the 1.5SMC75A suitable for bidirectional transient suppression?
No, the 1.5SMC75A is a unidirectional TVS diode intended for DC line protection with defined anode-cathode polarity. For bidirectional applications (e.g., AC signal lines or data buses), the 1.5SMC75CA variant must be used - it provides symmetrical clamping in both directions and carries a different marking code (FQJ vs. FRJ) and electrical test methodology.
What is the working stand-off voltage (VWM) specification for the 1.5SMC75A, and why does it matter?
The 1.5SMC75A has a working stand-off voltage (VWM) of 64.1 V - the maximum continuous reverse voltage it can block without exceeding 1 µA leakage current. This parameter ensures the device remains non-conductive during normal operation of a 64 V system (e.g., telecom -48 V with ripple), preventing power loss and false triggering while still allowing rapid avalanche onset during overvoltage events.
Does the 1.5SMC75A meet automotive surge immunity standards?
Yes, the 1.5SMC75A is explicitly rated to meet ISO 7637-2 for automotive transient immunity, covering Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply interruption), and Pulses 3a/3b (switching noise). Its 1500 W peak power rating and 103 V clamping voltage enable direct integration into BCM and ECU power inputs without supplemental filtering.
What packaging and reel quantity is offered for the 1.5SMC75A?
The 1.5SMC75A is supplied in DO-214AB (SMC) package format on tape-and-reel, with 3,000 units per reel. The tape conforms to EIA-481 standards, and the device is marked with code "FRJ" on the cathode band side - enabling full traceability, automated pick-and-place compatibility, and J-STD-020 Level 1 moisture sensitivity handling.
1.5SMC75A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 64.1V
- Voltage - Breakdown (Min):
- 71.3V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 15A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC75A FAQ
1.How can I place an order for 1.5SMC75A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC75A 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 1.5SMC75A reliable?
The price and inventory of 1.5SMC75A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC75A is usually 5 days.
3.What payment methods are accepted for 1.5SMC75A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC75A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC75A?
1.5SMC75A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC75A 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 1.5SMC75A?
For technical support, including 1.5SMC75A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC75A requirements.
6.How does Aetrix verify that 1.5SMC75A is sourced from the original manufacturer or authorized distributors?
All 1.5SMC75A 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 1.5SMC75A meets industry standards.
7.What is the process for return or replacement of 1.5SMC75A?
All 1.5SMC75A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC75A, 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 1.5SMC75A part is unused and in its original packaging.
Return procedure for 1.5SMC75A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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