My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5SMC27AH
- Part No.:
- 1.5SMC27AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27AH.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,487
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC27AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 27V nominal breakdown voltage (25.7–28.4V), 1500W peak pulse power rating, 37.5V maximum clamping voltage at 42A, AEC-Q101 qualification, and DO-214AB (SMC) package - deployed in automotive infotainment power rails and industrial sensor I/O protection.
For engineers reviewing the 1.5SMC27AH datasheet, 1.5SMC27AH pinout, 1.5SMC27AH application, or 1.5SMC27AH equivalent, key selection criteria include clamping voltage margin vs. protected IC VMAX, leakage current at system operating voltage, thermal derating above 25°C, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b waveforms.
Technical Context
The 1.5SMC27AH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified breakdown range (25.7–28.4V @ 1mA). Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1µA @ 23.1V), while sub-1ps response time enables suppression of ESD and fast transients before downstream components are stressed.
Thermally, it delivers 1500W peak pulse power (10/1000µs waveform) with RθJA = 50°C/W and RθJC = 15°C/W, supporting operation from –55°C to +150°C. It meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - enabling robust reflow compatibility in automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 25.7V / 28.4V @ 1mA - defines precise overvoltage trip threshold with ±5% tolerance for reliable protection activation |
| VWM | 23.1V - maximum continuous reverse working voltage; must exceed system DC rail (e.g., 24V nominal bus) |
| VC @ IPPM | 37.5V @ 42A - clamping voltage during 10/1000µs surge; determines maximum stress on protected load |
| PPK | 1500W - peak pulse power handling per single transient; supports ISO 7637-2 Pulse 1 (inductive load dump) immunity |
| IR @ VWM | <1µA - ultra-low leakage ensures minimal standby power loss and no false triggering in low-current circuits |
| TJ max | +150°C - junction temperature limit enabling use in under-hood automotive or enclosed industrial enclosures |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.11 × 6.22 mm footprint and cathode band marking |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (cathode terminal), weight ≈ 0.210g, UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-side reference | Connected to ground or lower-potential node; conducts during forward surge (e.g., reverse battery events) |
| Cathode | Protected line input / high-side connection | Connected to the line being protected (e.g., 24V supply rail); blocks until VBR exceeded, then clamps |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for front-end power stages in ADAS ECUs |
| Glass passivated junction | Stable VBR drift <0.096%/°C and consistent leakage across life - critical for long-term field deployment in industrial controls |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive switch-off), Pulse 2a/2b (load dump coupling), and Pulse 3a/3b (capacitive discharge) without degradation |
| Fast response <1ps | Clamps transients before propagation into sensitive analog or digital circuitry - essential for protecting CAN transceivers and microcontroller I/O |
| Level 1 MSL | No baking required prior to reflow; compatible with standard JEDEC J-STD-020 profiles - reduces manufacturing overhead in high-volume SMT lines |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 24V supply line feeding infotainment head unit exposed to load dump pulses up to 120V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24V rail and chassis ground to clamp surges before DC-DC converter input. Use Value: Limits peak voltage to ≤37.5V, preventing damage to 40V-rated input MOSFETs and ensuring uninterrupted operation per ISO 16750-2. | Use Scenario: 4–20mA current loop transmitter connected to PLC analog input subjected to ESD and cable-induced transients. IC Role / Device Role / Timing Role: TVS mounted across loop terminals to shunt fast transients before precision op-amp input stage. Use Value: Sub-1ps response and <1µA leakage preserve signal integrity and measurement accuracy while surviving ±8kV contact ESD (IEC 61000-4-2). |
| Telecom DC Power Input Protection | Motor Drive Control Signal Protection |
Use Scenario: -48V telecom rectifier output feeding baseband processor boards with sensitive logic supplies. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; unidirectional 1.5SMC27AH used on positive rail only (with separate negative-rail device if needed). Use Value: 1500W rating handles repetitive lightning-induced surges on outdoor cabinet feeds, maintaining uptime in harsh environments. | Use Scenario: PWM enable signal routed from MCU to gate driver IC near high-dV/dt motor switching nodes. IC Role / Device Role / Timing Role: TVS placed at gate driver input to absorb coupled transients from adjacent power traces. Use Value: Low clamping voltage (37.5V) prevents false triggering of driver enable logic, avoiding unintended motor stall or fault lockout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A | Same DO-214AA (SMB) package; 27V VBR, 600W PPK, higher VC = 43.5V @ 13.8A | Lower power handling limits use to lighter-duty surges (e.g., ESD-only); unsuitable for ISO 7637-2 Pulse 1 | Select 1.5SMC27AH when 1500W surge immunity is required; SMBJ27A only where space constraints force smaller SMB footprint and energy levels are lower. |
| SMCJ27A | Same DO-214AB (SMC) package; identical VBR, VC, and PPK; AEC-Q101 qualified; RoHS/halogen-free compliant | No functional difference; direct second-source alternative with same thermal and electrical performance | SMCJ27A offers equivalent protection and qualification - viable for dual-sourcing or supply chain diversification without design change. |
Compared with SMBJ27A and SMCJ27A, the 1.5SMC27AH provides superior surge energy handling (1500W vs. 600W) and matches SMCJ27A's full specification set - making it optimal for automotive and industrial applications demanding both high reliability and high-power transient suppression.
Availability
1.5SMC27AH is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecommunications infrastructure requiring stable component supply, AEC-Q101 compliance, and ISO 7637-2 immunity.
Supply support for 1.5SMC27AH 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 1.5SMCxxAH series belongs to TSC's AEC-Q101-qualified surface-mount TVS portfolio, engineered specifically for automotive and industrial power-line surge immunity with emphasis on clamping consistency, thermal robustness, and automated assembly compatibility.
FAQ
What is the breakdown voltage range of the 1.5SMC27AH?
The 1.5SMC27AH has a guaranteed breakdown voltage range of 25.7V to 28.4V at 1mA test current, measured per ANSI/IEEE C62.35. This tight ±5% tolerance ensures predictable activation timing across temperature and lifetime, critical for protecting 24V systems where overvoltage margins are constrained.
Is the 1.5SMC27AH suitable for bidirectional transient protection?
No - the 1.5SMC27AH is a unidirectional TVS diode, intended for protection of DC power lines with defined polarity. For bidirectional AC or data-line protection, TSC offers the 1.5SMC27CAH variant; using 1.5SMC27AH in reverse-biased configurations risks permanent failure due to lack of symmetrical avalanche structure.
What is the maximum clamping voltage of the 1.5SMC27AH during a surge event?
The 1.5SMC27AH clamps to a maximum of 37.5V at its rated peak pulse current of 42A (10/1000µs waveform). This value defines the upper voltage limit imposed on protected circuitry during worst-case transients - enabling designers to verify that downstream components (e.g., regulators, MCUs) remain within absolute maximum ratings.
Does the 1.5SMC27AH require special handling during PCB assembly?
No - the 1.5SMC27AH is rated MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and withstand standard lead-free reflow profiles (peak 260°C) without baking. Its matte tin-plated leads ensure solderability per J-STD-002, and the DO-214AB package supports high-speed pick-and-place placement.
How does the 1.5SMC27AH meet automotive reliability requirements?
The 1.5SMC27AH is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD (HBM ≥8kV, CDM ≥1kV). It also complies with ISO 7637-2 Pulse 1/2a/2b/3a/3b, confirming suitability for 12V/24V vehicle electrical systems per ISO 16750-2.
1.5SMC27AH 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 42A
- 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)
1.5SMC27AH FAQ
1.How can I place an order for 1.5SMC27AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27AH 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 1.5SMC27AH reliable?
The price and inventory of 1.5SMC27AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC27AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC27AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27AH?
1.5SMC27AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27AH 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 1.5SMC27AH?
For technical support, including 1.5SMC27AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27AH requirements.
6.How does Aetrix verify that 1.5SMC27AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27AH 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 1.5SMC27AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC27AH?
All 1.5SMC27AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27AH, 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 1.5SMC27AH part is unused and in its original packaging.
Return procedure for 1.5SMC27AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27AH 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…
