My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5SMC20H
- Part No.:
- 1.5SMC20H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20H.pdf
- Description:
- 1500W, 20V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,219
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC20H 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 20V breakdown voltage (18.0–22.0V), 1500W peak pulse power rating, 29.1V maximum clamping voltage at 54A surge current, and DO-214AB (SMC) package - used in automotive infotainment power inputs and industrial PLC I/O protection.
For engineers reviewing the 1.5SMC20H datasheet, 1.5SMC20H pinout, 1.5SMC20H application, or 1.5SMC20H equivalent, key selection criteria include working stand-off voltage (16.2V), leakage current (<1μA at VWM), AEC-Q101 qualification, ISO 7637-2 pulse immunity, and thermal resistance (RθJA = 50°C/W).
Technical Context
The 1.5SMC20H operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-1ps response to ESD and lightning-induced transients. Its clamping behavior follows IEEE C62.35 standards, with defined 10/1000μs waveform compliance and derating above 25°C ambient per Fig.2.
It supports single-die configuration in DO-214AB package, rated for -55°C to +150°C junction temperature, and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - critical for reflow-compatible automated assembly in automotive-grade production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 18.0V / 22.0V - ensures reliable avalanche initiation within ±10% tolerance at 1.0mA test current |
| VWM | 16.2V - maximum continuous reverse operating voltage before significant leakage begins |
| IPPM | 54A - peak impulse current it withstands while clamping to ≤29.1V (10/1000μs waveform) |
| PPK | 1500W - peak pulse power handling capability under standardized surge conditions |
| RθJA | 50°C/W - junction-to-ambient thermal resistance determines required PCB copper area for thermal management |
| IR @ VWM | <1μA - ultra-low blocking leakage preserves system standby power integrity |
| TJ max | +150°C - maximum junction temperature defines high-temp operational margin in engine bay or industrial enclosures |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional polarity marked by cathode band. Matte tin-plated leads, RoHS and halogen-free compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input reference node for unidirectional clamping | Connected to protected line (e.g., 24V rail); conducts only during negative transients when used in reverse-biased configuration |
| Cathode | Clamping output node | Connected to ground or low-impedance return path; sinks surge current into GND during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including powertrain and body control modules |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Glass passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| Fast response time | <1.0ps - limits voltage overshoot before clamping engages, protecting downstream ICs like CAN transceivers |
| Moisture sensitivity level 1 | No bake requirement prior to reflow; compatible with standard SMT assembly without floor-life constraints |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12V/24V battery-fed ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail input stage. Use Value: Limits transient excursions to ≤29.1V, preventing damage to LDOs and microcontrollers rated for 30V absolute max. |
Use Scenario: 4–20mA analog sensor loop interfacing with PLC analog input card. IC Role / Device Role / Timing Role: Bidirectional surge suppression on differential signal pair (with companion 1.5SMC20AH). Use Value: Maintains signal integrity during ESD events up to ±15kV contact discharge while adding <1pF parasitic capacitance. |
| Telecom DC Power Feeds | Consumer USB-C Port Protection |
Use Scenario: PoE-powered access point DC input subjected to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage TVS on 48V DC input before DC-DC converter. Use Value: Absorbs 1500W pulses without degradation, meeting IEC 61000-4-5 Level 4 requirements. |
Use Scenario: VBUS line in USB-C receptacle exposed to hot-plug ESD and cable coupling noise. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground. Use Value: Clamps 8kV HBM ESD events to safe levels within 1ps, preserving USB PD controller operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | Same DO-214AA package, lower PPK (600W), higher VC (32.4V @ 19.9A) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 (load dump) | Select 1.5SMC20H when 1500W surge handling and AEC-Q101 certification are mandatory. |
| SMCJ20A | Identical DO-214AB package and 1500W rating, but VBR range 20.0–22.1V (tighter tolerance), VC = 29.2V @ 51.7A | Nearly identical performance; minor variation in clamping consistency at extreme currents | 1.5SMC20H offers verified AEC-Q101 qualification and ISO 7637-2 validation per Taiwan Semiconductor documentation. |
Compared with SMBJ20A and SMCJ20A, the 1.5SMC20H provides guaranteed AEC-Q101 qualification, documented ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and tighter thermal resistance (RθJA = 50°C/W vs. typical 55–60°C/W), making it preferred for automotive and harsh-environment designs requiring traceable surge resilience.
Availability
1.5SMC20H is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom power systems requiring stable component supply with full AEC-Q101 and RoHS compliance.
Supply support for 1.5SMC20H 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, Taiwan.
The 1.5SMCxxH series was developed for high-reliability, surface-mount transient suppression in automotive and industrial environments, emphasizing AEC-Q101 qualification, ISO 7637-2 immunity, and robust thermal performance in DO-214AB packaging.
FAQ
What is the clamping voltage of the 1.5SMC20H under maximum surge conditions?
The 1.5SMC20H has a maximum clamping voltage (VC) of 29.1V at 54A peak impulse current (IPPM) under the standardized 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 29.1V during worst-case transients - critical for protecting 30V-rated regulators and interface ICs in the 1.5SMC20H's target applications.
Is the 1.5SMC20H suitable for bidirectional transient protection?
No - the 1.5SMC20H is unidirectional and intended for reverse-biased operation across a DC rail and ground. For bidirectional protection, the 1.5SMC20AH variant must be used. The "H" suffix denotes unidirectional construction with cathode band marking; using 1.5SMC20H in AC or bipolar signal paths risks forward conduction and failure during positive half-cycles.
Does the 1.5SMC20H meet automotive qualification standards?
Yes - the 1.5SMC20H is explicitly AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1 (load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling). These certifications are documented in Taiwan Semiconductor's B2207 datasheet revision and validate its use in automotive power distribution modules, body control units, and infotainment systems.
What is the maximum leakage current specification for the 1.5SMC20H at its working voltage?
The 1.5SMC20H specifies a maximum blocking leakage current (IR) of less than 1μA at its working stand-off voltage (VWM) of 16.2V. This ultra-low leakage ensures minimal impact on battery-powered or low-quiescent-current systems - such as always-on automotive sensors - where even microamp-level drain could affect functional safety or sleep-mode duration.
Can the 1.5SMC20H be used in lead-free reflow processes without preconditioning?
Yes - the 1.5SMC20H is rated at Moisture Sensitivity Level 1 per J-STD-020, meaning it has unlimited floor life and requires no baking or dry-pack handling before lead-free reflow (peak temperature up to 260°C). Its matte tin-plated leads comply with J-STD-002 solderability requirements, supporting high-yield automated placement and reflow in automotive Tier-1 manufacturing lines.
1.5SMC20H 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):
- 16.2V
- Voltage - Breakdown (Min):
- 18V
- Voltage - Clamping (Max) @ Ipp:
- 29.1V
- Current - Peak Pulse (10/1000µs):
- 54A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC20H FAQ
1.How can I place an order for 1.5SMC20H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20H 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 1.5SMC20H reliable?
The price and inventory of 1.5SMC20H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC20H is usually 5 days.
3.What payment methods are accepted for 1.5SMC20H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20H?
1.5SMC20H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20H 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 1.5SMC20H?
For technical support, including 1.5SMC20H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20H requirements.
6.How does Aetrix verify that 1.5SMC20H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20H 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 1.5SMC20H meets industry standards.
7.What is the process for return or replacement of 1.5SMC20H?
All 1.5SMC20H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20H, 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 1.5SMC20H part is unused and in its original packaging.
Return procedure for 1.5SMC20H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20H 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…
