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Taiwan Semiconductor Corporation 1.5SMC47A
- Part No.:
- 1.5SMC47A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47A.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,656
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Product details
Overview
1.5SMC47A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 44.7–49.4 V breakdown voltage (VBR), 40.2 V working stand-off voltage (VWM), 64.8 V maximum clamping voltage (VC) at 24 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 µs waveform - deployed in telecom front-ends, industrial I/O modules, and automotive body control units.
For engineers reviewing the 1.5SMC47A datasheet, 1.5SMC47A pinout, 1.5SMC47A application, or 1.5SMC47A equivalent, this page delivers verified electrical parameters, DO-214AB package details, clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, thermal resistance values, and real-world ESD/transient immunity use cases - all validated against Taiwan Semiconductor's S2207 specification release.
Technical Context
The 1.5SMC47A operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1.0 ps) to transient events while maintaining low leakage (<1 µA at 40.2 V). Its DO-214AB (SMC) package enables automated placement and supports 200 A non-repetitive forward surge current (IFSM) for load-dump immunity in 12 V automotive systems.
Thermal design is enabled by RθJA = 50 °C/W and RθJC = 15 °C/W, allowing reliable operation up to TJ = +150 °C. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, with matte tin-plated leads compliant to J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V - defines minimum and maximum voltage at which avalanche conduction begins under 1 mA test current; ensures consistent turn-on across production lots |
| VWM | 40.2 V - maximum continuous reverse operating voltage before significant leakage; sets safe DC rail margin for 36–42 V nominal systems |
| VC @ IPPM=24 A | 64.8 V - clamped voltage during 10/1000 µs surge; limits downstream IC stress to <65 V in 48 V industrial power supplies |
| PPK | 1500 W - peak pulse power handling per single 10/1000 µs transient; supports ISO 7637-2 Pulse 5a (load dump) compliance |
| IR @ VWM | <1 µA - ultra-low blocking leakage at rated stand-off voltage; prevents battery drain in always-on automotive modules |
| TJ max | +150 °C - maximum junction temperature; enables deployment in under-hood ECUs without derating in ambient up to +105 °C |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.11 mm × 6.22 mm footprint and 2.3 mm height; compatible with standard SMT reflow profiles |
Pinout & Package
DO-214AB (SMC) package: molded epoxy case with cathode band marking; matte tin-plated leads; polarity indicated by black band on cathode end; weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to protected circuit ground or low-side return path; enables unidirectional clamping from rail to GND |
| Cathode | Current exit point during reverse avalanche | Connected to protected line (e.g., 48 V supply); absorbs transients by shunting excess energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| Clamping ratio (VC/VBR) | 1.31 - low ratio confirms efficient voltage limiting; reduces required safety margin for downstream 75 V-rated components |
| Response time <1.0 ps | Enables suppression of ESD events (IEC 61000-4-2) and fast-rising lightning-induced surges before IC damage occurs |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; supports direct placement from dry pack into high-volume SMT lines |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; suitable for consumer and medical-grade assemblies |
Applications
| Industrial PLC Analog Input Protection | Automotive Body Control Module (BCM) Power Rail |
|---|---|
Use Scenario: Protecting 0–10 V analog sensor inputs in programmable logic controllers from induced transients during motor switching or relay coil de-energization. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input terminal and system ground to clamp surges before they reach precision ADC front-end. Use Value: Limits voltage excursion to ≤64.8 V during 1 kV/50 Ω surge, preserving 24-bit ADC accuracy and preventing latch-up in op-amp buffers. |
Use Scenario: Safeguarding 12 V supply lines feeding microcontrollers and CAN transceivers in door modules exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main BCM power rail, coordinated with upstream fuse and secondary LC filtering. Use Value: Withstands 1500 W peak pulses per ISO 7637-2 Pulse 5a, enabling compliance without oversized heatsinking or redundant devices. |
| Telecom Base Station DC Feeder Line | Smart Energy Meter RS-485 Interface |
Use Scenario: Protecting -48 V DC power feeds entering remote radio units from lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground on negative rail, providing low-impedance path for positive-going transients. Use Value: Clamps 10/1000 µs surges to 64.8 V while maintaining <1 µA leakage at -40.2 V, ensuring no impact on -48 V system regulation. |
Use Scenario: Shielding half-duplex RS-485 transceivers in utility meters from ESD events during field maintenance and induced noise on long bus runs. IC Role / Device Role / Timing Role: Bidirectional protection implemented using two 1.5SMC47A devices in series opposition across A/B lines to ground. Use Value: Achieves ±64.8 V clamping symmetry with matched VBR tolerance (±4.7 V), meeting IEC 61000-4-2 Level 4 (15 kV air/8 kV contact) requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45A (Bourns) | Same DO-214AA package; 45 V VWM, 69.4 V VC @ 21.7 A; 600 W PPK | Lower peak power rating limits suitability for ISO 7637-2 Pulse 5a; better fit for ESD-only scenarios | Select when space-constrained layouts require smaller SMB footprint and 600 W surge capacity suffices |
| 1.5KE47A (Taiwan Semiconductor) | Through-hole DO-15 package; identical VBR/VC specs but higher RθJA (75 °C/W); 1500 W rating | Requires wave soldering or hand assembly; unsuitable for fully automated SMT lines | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ45A, the 1.5SMC47A delivers 2.5× higher surge power handling in the same mounting area; versus 1.5KE47A, it enables full SMT automation and improves thermal dissipation by 33% via lower RθJA.
Availability
1.5SMC47A is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, telecom DC feeder systems, and smart energy meter interfaces requiring stable component supply and full traceability.
Supply support for 1.5SMC47A 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 - headquartered in Hsinchu Science Park with global distribution and AEC-Q200 qualified production lines.
The 1.5SMC47A belongs to TSC's SMC-series TVS family engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding robust ISO 7637-2 and IEC 61000-4-5 compliance.
FAQ
What is the polarity configuration of the 1.5SMC47A?
The 1.5SMC47A is a unidirectional TVS diode, with cathode marked by a band on the DO-214AB package. It conducts only during reverse-biased overvoltage events - i.e., when the cathode voltage exceeds the anode by ≥44.7 V - and blocks current below 40.2 V in normal operation. This configuration makes the 1.5SMC47A ideal for protecting positive DC rails referenced to ground, and it must be oriented with cathode toward the protected line and anode to ground.
Does the 1.5SMC47A meet automotive transient standards?
Yes, the 1.5SMC47A meets ISO 7637-2 Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply interruption), Pulse 3a/3b (switching noise), and - critically - Pulse 5a (load dump) when used with appropriate layout and upstream fusing. Its 1500 W peak power rating and 64.8 V clamping voltage at 24 A enable compliance with 12 V system load dump requirements up to 300 ms duration, as confirmed in Taiwan Semiconductor's S2207 datasheet.
How does the 1.5SMC47A compare to the 1.5SMC47 (non-A suffix)?
The 1.5SMC47A offers tighter breakdown voltage tolerance (44.7–49.4 V) versus the 1.5SMC47 (42.3–51.7 V), resulting in more predictable clamping onset and reduced variation across temperature. Both share identical DO-214AB packaging, 1500 W rating, and thermal specs, but the "A" variant's ±5% VBR spread (vs. ±10% for non-A) improves design margin control in precision 48 V systems where over-clamping must be avoided.
Can the 1.5SMC47A be used for bidirectional protection?
No - the 1.5SMC47A is strictly unidirectional. For bidirectional applications (e.g., AC lines or differential buses like RS-485), Taiwan Semiconductor specifies the 1.5SMC47CA variant, which integrates two anti-series diodes in one DO-214AB package. Using two 1.5SMC47A devices in back-to-back configuration is possible but occupies double the PCB area and introduces mismatch risk; the 1.5SMC47CA is the validated, space-efficient solution.
What is the maximum allowable PCB trace length when placing the 1.5SMC47A?
To maintain effective transient suppression, PCB trace inductance between the 1.5SMC47A and protected node must be minimized - ideally ≤5 mm total loop length (anode-to-ground + cathode-to-line). Longer traces increase impedance during fast transients (>1 ns rise time), raising clamped voltage beyond the specified 64.8 V. Layout best practice requires placing the 1.5SMC47A directly at the connector or IC power pin, with dedicated ground plane vias within 2 mm of the anode pad.
1.5SMC47A 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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 24A
- 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)
1.5SMC47A FAQ
1.How can I place an order for 1.5SMC47A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47A 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 1.5SMC47A reliable?
The price and inventory of 1.5SMC47A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC47A is usually 5 days.
3.What payment methods are accepted for 1.5SMC47A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47A?
1.5SMC47A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47A 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 1.5SMC47A?
For technical support, including 1.5SMC47A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47A requirements.
6.How does Aetrix verify that 1.5SMC47A is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47A 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 1.5SMC47A meets industry standards.
7.What is the process for return or replacement of 1.5SMC47A?
All 1.5SMC47A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47A, 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 1.5SMC47A part is unused and in its original packaging.
Return procedure for 1.5SMC47A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC47A Tags
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