My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5SMC12
- Part No.:
- 1.5SMC12
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12.pdf
- Description:
- 1500W, 12V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,162
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC12 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 10.8–13.2V breakdown voltage (VBR), and 17.3V maximum clamping voltage (VC) at 91A peak impulse current. It protects DC power rails and signal lines in telecom and industrial equipment against ESD and lightning-induced transients.
For engineers reviewing the 1.5SMC12 datasheet, 1.5SMC12 pinout, 1.5SMC12 application, or 1.5SMC12 equivalent, this page delivers verified electrical specs, thermal performance, clamping behavior under 10/1000μs surge, ISO 7637-2 compliance, and real-world design implications for board-level surge immunity.
Technical Context
The 1.5SMC12 operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-1ps response to transients. Its 10.8–13.2V VBR range at 1mA test current ensures precise overvoltage triggering, while 17.3V clamping at 91A IPPM limits downstream voltage stress during 1500W surges.
Thermally, it features 15°C/W junction-to-case (RθJC) and 50°C/W junction-to-ambient (RθJA) resistance, supporting sustained operation up to +150°C junction temperature. Leakage remains ≤1μA at 9.72V working stand-off voltage (VWM), minimizing standby power loss in low-current systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 10.8V to 13.2V at 1mA - defines reliable turn-on threshold for overvoltage protection |
| VWM | 9.72V - maximum continuous reverse voltage before leakage exceeds 1μA |
| VC @ IPPM | 17.3V at 91A - peak clamped voltage during 10/1000μs surge, limiting IC stress |
| PPK | 1500W - peak pulse power handling per single 1ms transient, per Fig.5 waveform |
| IPPM | 91A - maximum non-repetitive surge current the device safely clamps |
| TJ max | +150°C - maximum junction temperature, enabling use in high-ambient industrial environments |
| RθJC | 15°C/W - enables efficient heat transfer to PCB copper when mounted with adequate thermal pad |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0; matte tin-plated leads comply with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected line | Connected to ground or return path; conducts surge current to reference plane |
| Cathode | High-side connection to protected line | Marked with band; connects to supply rail or signal line requiring clamping |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under humidity and thermal cycling |
| Sub-1ps response time | Clamps ESD events before sensitive logic or analog circuitry sustains damage |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and inductive-switching immunity without external filtering |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; supports standard SMT assembly without preconditioning |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU directives for environmentally constrained applications |
Applications
| Telecom Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12V DC input stage of VoIP gateway exposed to induced surges on PoE or AC-DC adapter lines. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and chassis ground to shunt transients before DC-DC converter input. Use Value: 17.3V clamping ensures downstream 12V-rated regulators and controllers remain below absolute maximum ratings during 1kV/500A ISO 7637-2 Pulse 2b events. | Use Scenario: 24V digital input module in programmable logic controller subjected to relay coil flyback and field-wiring ESD. IC Role / Device Role / Timing Role: Standoff protector across input optocoupler anode-cathode, referenced to system ground. Use Value: 9.72V VWM allows full 24V logic-high margin while blocking normal operation; 91A IPPM handles repetitive 50A inductive spikes. |
| Consumer Audio Power Rail Clamp | Automotive Body Control Module (BCM) Sensor Line |
Use Scenario: 12V bias rail for Class-D amplifier IC in smart speaker, subject to hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Primary rail clamp adjacent to power entry connector, oriented anode-to-ground. Use Value: Sub-1ps response prevents latch-up in amplifier gate drivers; 1μA leakage at 9.72V avoids quiescent current penalty in battery-backed designs. | Use Scenario: 12V sensor supply line (e.g., ambient temperature sensor) in BCM exposed to battery disconnect transients. IC Role / Device Role / Timing Role: Unidirectional TVS between sensor VCC and GND, placed within 2cm of connector. Use Value: 1500W rating withstands 100V/10A load-dump pulses (ISO 7637-2 Pulse 5a); DO-214AB footprint fits tight routing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | 600W rating, DO-214AA (SMB) package, 13.3V VC @ 43A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a | Select when board space is constrained and surge energy ≤600W |
| 1.5KE12A | Through-hole TO-204AE (DO-41), same 1500W rating but slower thermal response | Requires wave soldering; incompatible with fully SMT production | Select only for legacy through-hole designs or prototyping where rework access is needed |
Compared with SMBJ12A and 1.5KE12A, the 1.5SMC12 delivers identical 1500W surge capability in a surface-mount DO-214AB package with superior thermal resistance (15°C/W vs. ~25°C/W for DO-41), enabling higher reliability in automated, high-density industrial PCBs.
Availability
1.5SMC12 is available at Aetrix Electronics and suitable for telecom power input protection, industrial PLC digital I/O protection, and consumer audio power rail clamp applications requiring stable component supply and full compliance with ISO 7637-2.
Supply support for 1.5SMC12 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 1.5SMC12 belongs to TSC's SMC-family of high-power surface-mount TVS diodes, engineered specifically for robust, automated assembly into harsh-environment electronics requiring repeatable clamping performance and AEC-Q200-aligned reliability.
FAQ
What is the clamping voltage of the 1.5SMC12 under a standard 10/1000μs surge?
The 1.5SMC12 exhibits a maximum clamping voltage (VC) of 17.3V when subjected to its rated peak impulse current of 91A, defined by the 10/1000μs double-exponential waveform per IEC 61000-4-5 and R.E.A. standards. This value is measured at TA = 25°C and ensures downstream components see no more than 17.3V during worst-case transient events. The 1.5SMC12 maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC12 suitable for bidirectional transient protection?
No - the 1.5SMC12 is a unidirectional TVS diode, intended for DC rail protection where polarity is fixed. For bidirectional AC or data-line protection, TSC offers the 1.5SMC12CA variant (with "CA" suffix), which provides symmetrical clamping in both directions. Using the 1.5SMC12 on AC signals risks forward conduction and failure; always verify polarity alignment in the 1.5SMC12 application layout.
What is the maximum steady-state power dissipation for the 1.5SMC12?
The 1.5SMC12 has a steady-state power dissipation (PD) rating of 6.5W at TA = 25°C, derived from its thermal resistance and junction temperature limit. This value applies only to continuous DC or low-frequency conditions - not transient suppression. In normal operation, leakage current remains ≤1μA at 9.72V, resulting in <10μW static power loss. The 1.5SMC12 is not intended for continuous power regulation.
Does the 1.5SMC12 meet automotive surge immunity standards?
Yes - the 1.5SMC12 meets ISO 7637-2 requirements for Pulses 1, 2a, 2b, 3a, and 3b, covering common automotive transient threats including load dump, alternator ripple, and inductive switching. While not AEC-Q200 qualified itself, its construction (glass-passivated junction, MSL1, halogen-free) aligns with automotive-grade process controls. For full qualification, specify the AEC-Q200-compliant variant if available.
What is the marking code for the 1.5SMC12 on the device body?
The 1.5SMC12 is marked with the code "DSJ" on its package, per TSC's standardized SMC-series marking scheme. This two-letter code appears adjacent to the cathode band on the DO-214AB body and is used for traceability and visual identification during inspection or rework. The "DSJ" marking uniquely identifies the 1.5SMC12 within the 1.5SMC6.8–1.5SMC200 family and must be verified alongside the date and factory codes (e.g., YW, F) for full lot traceability of the 1.5SMC12.
1.5SMC12 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):
- 9.72V
- Voltage - Breakdown (Min):
- 10.8V
- Voltage - Clamping (Max) @ Ipp:
- 17.3V
- Current - Peak Pulse (10/1000µs):
- 91A
- 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)
1.5SMC12 FAQ
1.How can I place an order for 1.5SMC12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12 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 1.5SMC12 reliable?
The price and inventory of 1.5SMC12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC12 is usually 5 days.
3.What payment methods are accepted for 1.5SMC12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12?
1.5SMC12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12 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 1.5SMC12?
For technical support, including 1.5SMC12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12 requirements.
6.How does Aetrix verify that 1.5SMC12 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12 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 1.5SMC12 meets industry standards.
7.What is the process for return or replacement of 1.5SMC12?
All 1.5SMC12 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12, 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 1.5SMC12 part is unused and in its original packaging.
Return procedure for 1.5SMC12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC12 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
