My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5SMC15
- Part No.:
- 1.5SMC15
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC15.pdf
- Description:
- 1500W, 15V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,724
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC15 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 13.5–16.5 V breakdown voltage (VBR), 12.1 V working stand-off voltage (VWM), 22.0 V maximum clamping voltage (VC) at 71 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 1.5SMC15 datasheet, 1.5SMC15 pinout, 1.5SMC15 application, or 1.5SMC15 equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, leakage current ≤1 µA at VWM, DO-214AB (SMC) package thermal resistance (RθJA = 50 °C/W), and unidirectional polarity marking for correct PCB orientation.
Technical Context
This TVS operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches into low-impedance conduction to divert surge energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at 12.1 V), while sub-1 ps response time enables effective suppression of ESD and fast transients.
The device is rated for 150 °C maximum junction temperature and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1. Its DO-214AB package supports automated placement and provides 0.210 g mass with matte tin-plated leads compliant with J-STD-002 solderability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 13.5 V / 16.5 V - defines reliable avalanche initiation range under 1.0 mA test current; ensures consistent turn-on across temperature and unit variation |
| VWM | 12.1 V - maximum continuous DC or RMS voltage the device blocks without significant leakage; sets upper limit for protected circuit operating voltage |
| VC @ IPPM | 22.0 V at 71 A - clamping voltage during 10/1000 µs surge; determines worst-case overvoltage seen by downstream components |
| PPK | 1500 W - peak pulse power handling per single non-repetitive 10/1000 µs waveform; defines surge energy absorption capacity |
| IR @ VWM | ≤1 µA - blocking leakage current at stand-off voltage; critical for low-power sensor interfaces and battery-backed circuits |
| TJ max | +150 °C - maximum allowable junction temperature; constrains thermal design margin in high-ambient or high-duty-cycle applications |
| RθJA | 50 °C/W - junction-to-ambient thermal resistance; used to calculate temperature rise under steady-state power dissipation (PD = 6.5 W) |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0 flammability rating; terminals are matte tin-plated for J-STD-002-compliant soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest-potential node in unidirectional clamp configuration; completes current path during avalanche conduction |
| Cathode | High-side input terminal | Connected to protected line (e.g., 12 V rail); polarity marking (band) must align with schematic symbol to prevent reverse-bias failure |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance (±5% for 1.5SMC15A variant) and long-term reliability under thermal cycling and humidity exposure |
| Clamping voltage ≤22.0 V at 71 A | Provides safe overvoltage margin for 12 V systems - keeps downstream logic (e.g., CAN transceivers, microcontrollers) below absolute maximum ratings during load dump |
| Response time <1.0 ps | Enables suppression of nanosecond-scale ESD events (IEC 61000-4-2) before sensitive inputs enter destructive breakdown |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Validated for automotive-level transient immunity - suitable for body electronics, infotainment power supplies, and LIN bus protection |
| Moisture sensitivity level 1 (J-STD-020) | Allows unlimited floor life at ambient conditions - eliminates bake requirements prior to reflow, reducing manufacturing cost and risk |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects 12 V supply rail and switch-sense inputs against load dump (ISO 7637-2 Pulse 5a) and inductive kickback from solenoid drivers. IC Role / Device Role: Unidirectional shunt TVS placed between VIN and GND, upstream of LDO regulators and microcontroller power pins. Use Value: Limits clamped voltage to 22.0 V during 71 A surges, preventing latch-up or permanent damage to 3.3 V/5 V logic powered from the same rail. |
Use Scenario: Shields 24 V digital input channels from field-wiring transients caused by relay contact bounce, motor switching, and lightning-induced coupling. IC Role / Device Role: Primary overvoltage clamp on each optocoupler input side, mounted directly at connector entry point. Use Value: With ≤1 µA leakage at 12.1 V stand-off, avoids false triggering of high-impedance input comparators while clamping surges to safe levels. |
| Telecom Power Feeding Interface | Consumer Appliance Mainboard 12 V Rail |
Use Scenario: Guards PoE-powered Ethernet port circuitry (e.g., PHY, magnetics, DC-DC converter) against induced surges from nearby AC mains or lightning. IC Role / Device Role: Secondary protection stage after gas discharge tube (GDT), placed adjacent to DC-DC input filter capacitor. Use Value: Fast <1 ps response captures residual fast edges missed by slower GDTs; 1500 W rating handles combined surge energy per IEC 61000-4-5 Level 4. |
Use Scenario: Secures 12 V distribution network feeding display backlight drivers, fan controllers, and audio amplifiers in smart refrigerators and washing machines. IC Role / Device Role: Point-of-load TVS on main 12 V bus near bulk capacitor, oriented to protect against reverse-polarity connection errors and ESD from user interface buttons. Use Value: Cathode-band polarity marking ensures correct installation; DO-214AB footprint allows high-current trace routing without thermal derating penalties. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A (Bourns) | Same DO-214AA package; 15.0–16.7 V VBR; 24.4 V VC @ 61.5 A; 600 W PPK | Lower peak power rating limits use in high-energy automotive load dump scenarios | Select SMBJ15A only where surge energy is constrained to ≤600 W (e.g., low-duty-cycle consumer I/O) |
| 1.5KE15A (ON Semiconductor) | Through-hole DO-15 package; identical VBR/VC specs but 1500 W rating; higher RθJA (~65 °C/W) | Requires PCB through-hole mounting and larger board area; unsuitable for high-density SMT designs | Choose 1.5KE15A only when legacy through-hole assembly is mandated or thermal management permits higher junction rise |
Compared with SMBJ15A and 1.5KE15A, the 1.5SMC15 delivers full 1500 W surge capability in a compact DO-214AB footprint with industry-leading 50 °C/W thermal resistance - making it optimal for space-constrained, high-reliability 12 V system protection where both energy handling and thermal performance are critical.
Availability
1.5SMC15 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and telecom power interface applications requiring stable component supply, RoHS/halogen-free compliance, and J-STD-020 Level 1 moisture handling.
Supply support for 1.5SMC15 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, with global distribution and AEC-Q200-qualified product lines.
The 1.5SMC series was engineered for high-energy, surface-mount transient suppression in automotive, industrial, and telecom infrastructure - emphasizing robust clamping, automated assembly compatibility, and compliance with ISO 7637-2 and IEC 61000-4-x standards.
FAQ
What is the breakdown voltage range for 1.5SMC15?
The 1.5SMC15 has a guaranteed breakdown voltage (VBR) range of 13.5 V to 16.5 V when tested at 1.0 mA, measured per ANSI/IEEE C62.35. This range reflects process variation and ensures reliable avalanche turn-on across all units under standard conditions - critical for predictable clamping behavior in 12 V systems where 1.5SMC15 is commonly applied.
Does 1.5SMC15 meet automotive transient immunity standards?
Yes, 1.5SMC15 meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for transient immunity in road vehicles. Its 1500 W peak pulse power rating and 22.0 V clamping voltage at 71 A enable effective suppression of common automotive transients including battery disconnect spikes and inductive switching noise - validated per the manufacturer's test methodology and curve data.
What is the maximum clamping voltage of 1.5SMC15 under surge conditions?
The maximum clamping voltage (VC) of 1.5SMC15 is 22.0 V when subjected to its rated peak pulse current of 71 A using the standardized 10/1000 µs waveform. This value represents the highest voltage that will appear across the protected line during a worst-case surge event - a key parameter for ensuring downstream ICs remain within their absolute maximum voltage ratings.
Is 1.5SMC15 suitable for bidirectional transient protection?
No, 1.5SMC15 is a unidirectional TVS diode intended for DC rail protection with defined anode-cathode polarity. For bidirectional applications (e.g., AC signal lines or data buses), TSC offers the 1.5SMC15CA variant - which uses a center-tapped dual-die configuration and carries the "CA" suffix. Using 1.5SMC15 in bidirectional mode risks catastrophic failure due to forward conduction during negative transients.
What package type does 1.5SMC15 use, and what are its key mechanical attributes?
1.5SMC15 uses the DO-214AB (SMC) surface-mount package: a molded plastic case with matte tin-plated leads, UL 94V-0 flammability rating, and polarity-indicating cathode band. It weighs approximately 0.210 g, meets JESD201 Class 2 whisker resistance, and is rated for moisture sensitivity level 1 per J-STD-020 - enabling direct placement without baking.
1.5SMC15 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):
- 12.1V
- Voltage - Breakdown (Min):
- 13.5V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 71A
- 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)
1.5SMC15 FAQ
1.How can I place an order for 1.5SMC15 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC15 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 1.5SMC15 reliable?
The price and inventory of 1.5SMC15 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC15 is usually 5 days.
3.What payment methods are accepted for 1.5SMC15?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC15 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC15?
1.5SMC15 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC15 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 1.5SMC15?
For technical support, including 1.5SMC15 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC15 requirements.
6.How does Aetrix verify that 1.5SMC15 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC15 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 1.5SMC15 meets industry standards.
7.What is the process for return or replacement of 1.5SMC15?
All 1.5SMC15 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC15, 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 1.5SMC15 part is unused and in its original packaging.
Return procedure for 1.5SMC15:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC15 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…
