My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5SMC27CAH
- Part No.:
- 1.5SMC27CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27CAH.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,268
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC27CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with breakdown voltage 25.7–28.4 V at 1 mA test current, working stand-off voltage 23.1 V, and clamping voltage 37.5 V at 42 A peak impulse current. It protects automotive and industrial power rails against ESD, lightning-induced surges, and load-switch transients.
For engineers reviewing the 1.5SMC27CAH datasheet, 1.5SMC27CAH pinout, 1.5SMC27CAH application, or 1.5SMC27CAH equivalent, this device is selected for high-energy surge immunity in AEC-Q101-compliant systems requiring ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, fast sub-1 ps response, and <1 µA leakage above 10 V.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering consistent clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage across -55°C to +150°C operating range.
Designed for unclamped inductive switching events and electrostatic discharge, it sustains 1500 W peak pulse power (10/1000 µs waveform) with thermal resistance RθJA = 50°C/W and RθJC = 15°C/W, enabling reliable operation under repeated surge stress without derating below 25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 25.7 V / 28.4 V - Ensures predictable turn-on within ±5% tolerance at 1 mA, critical for precise overvoltage threshold setting |
| VWM | 23.1 V - Maximum continuous DC or RMS voltage the device blocks without conduction, defining safe operating margin |
| VC @ IPPM | 37.5 V at 42 A - Clamped voltage during 10/1000 µs surge, limiting downstream IC stress to safe levels |
| PPK | 1500 W - Peak pulse power handling capability per single 10/1000 µs transient, meeting ISO 7637-2 severity level 5 |
| IR @ VWM | <1 µA - Ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max | +150°C - Enables use in under-hood automotive environments and high-temperature industrial enclosures |
| Response time | <1.0 ps - Near-instantaneous reaction to ESD and fast-rising transients, preventing latch-up or damage to sensitive inputs |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, RoHS and halogen-free compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical terminals enable bidirectional clamping; no polarity marking required - simplifies PCB layout and eliminates orientation errors |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control units, body modules, and ADAS sensors |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Guarantees robustness against real-world vehicle electrical disturbances without external filtering |
| Glass passivated junction | Provides long-term stability of VBR and low IR drift over temperature and lifetime |
| DO-214AB mechanical robustness | UL 94V-0 molding compound and JESD201 Class 2 whisker resistance ensure reliability in automated assembly and harsh environments |
| Fast response <1 ps | Prevents voltage overshoot before protection engages - essential for protecting high-speed interfaces and microcontrollers |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in vehicle ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at board-level input filter stage. Use Value: Limits voltage to ≤37.5 V during 1500 W surges, preventing damage to downstream DC-DC converters and CAN transceivers. |
Use Scenario: Safeguarding analog input channels on programmable logic controller modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp before precision op-amp front-end. Use Value: Sub-1 ps response ensures clamping occurs before transient energy couples into signal conditioning circuitry. |
| Telecom Base Station DC Feeds | Consumer Appliance Motor Drive Inputs |
Use Scenario: Shielding 48 V DC power inputs in remote radio units from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: High-power transient shunt mounted directly at connector entry point. Use Value: 1500 W rating handles multi-kA induced currents while maintaining VC ≤37.5 V, preserving upstream rectifier and supervisor ICs. |
Use Scenario: Suppressing commutation spikes on brushed motor drive inputs in smart home appliances. IC Role / Device Role / Timing Role: Secondary surge limiter parallel to bulk capacitor on H-bridge supply rail. Use Value: Low 23.1 V VWM allows placement after fuse but before MOSFET gate drivers, ensuring safe turn-off during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Lower peak power (600 W), higher VC (38.9 V at 15.4 A), same DO-214AA package | Not suitable for ISO 7637-2 Pulse 5 or high-energy load dump; limited to lower-tier surge classes | Select when cost sensitivity outweighs energy handling requirements and board space permits larger footprint |
| 1.5KE27CA | Through-hole TO-204AE (DO-41) package, identical VBR range and PPK, slower thermal response | Requires manual or wave soldering; unsuitable for fully automated SMT lines or compact designs | Choose only for legacy through-hole designs or where thermal mass improves sustained surge endurance |
Compared with SMBJ24CA and 1.5KE27CA, the 1.5SMC27CAH delivers superior surge energy absorption in an AEC-Q101-qualified SMT package with faster response and lower clamping voltage - making it optimal for next-generation automotive and industrial edge nodes demanding high-reliability, high-density protection.
Availability
1.5SMC27CAH is available at Aetrix Electronics and suitable for automotive power management, industrial PLC I/O protection, and telecom DC feed applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC27CAH 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, and rectifiers with global distribution and AEC-Q101 validation capabilities.
The 1.5SMCxxCAH series was developed specifically for high-reliability, high-energy transient suppression in automotive and industrial environments - emphasizing ISO 7637-2 compliance, low leakage, and robust SMT manufacturability.
FAQ
What is the breakdown voltage range of the 1.5SMC27CAH?
The 1.5SMC27CAH has a guaranteed breakdown voltage range of 25.7 V to 28.4 V at 1 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage design margins in safety-critical systems.
Is the 1.5SMC27CAH suitable for automotive applications?
Yes, the 1.5SMC27CAH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements - making it appropriate for engine control units, body control modules, infotainment power supplies, and ADAS sensor interfaces where robust transient immunity is mandatory.
How does the 1.5SMC27CAH differ from unidirectional variants like 1.5SMC27H?
The 1.5SMC27CAH is bidirectional and symmetrical, providing identical clamping in both polarities, whereas 1.5SMC27H is unidirectional with a defined cathode band. The CAH version eliminates polarity concerns in AC-coupled or floating bus protection, while the H variant requires correct orientation and offers slightly lower VC in forward conduction.
What is the maximum clamping voltage of the 1.5SMC27CAH under surge conditions?
The 1.5SMC27CAH clamps to a maximum of 37.5 V at 42 A peak impulse current (10/1000 µs waveform), as specified in the Electrical Specifications table. This value defines the upper voltage limit imposed on protected circuitry during worst-case transients.
Does the 1.5SMC27CAH require heatsinking in typical applications?
No dedicated heatsink is required for single-event surge suppression due to its 1500 W peak rating and low duty cycle. However, for repetitive surges or elevated ambient temperatures (>70°C), PCB copper area per JEDEC standards and thermal vias are recommended to maintain junction temperature ≤150°C.
1.5SMC27CAH 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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC27CAH FAQ
1.How can I place an order for 1.5SMC27CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27CAH 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 1.5SMC27CAH reliable?
The price and inventory of 1.5SMC27CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC27CAH is usually 5 days.
3.What payment methods are accepted for 1.5SMC27CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27CAH?
1.5SMC27CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27CAH 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 1.5SMC27CAH?
For technical support, including 1.5SMC27CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27CAH requirements.
6.How does Aetrix verify that 1.5SMC27CAH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27CAH 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 1.5SMC27CAH meets industry standards.
7.What is the process for return or replacement of 1.5SMC27CAH?
All 1.5SMC27CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27CAH, 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 1.5SMC27CAH part is unused and in its original packaging.
Return procedure for 1.5SMC27CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27CAH 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…
