My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5SMC30CAH
- Part No.:
- 1.5SMC30CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30CAH.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,291
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC30CAH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 30V breakdown voltage (28.5–31.5V), and 41.4V maximum clamping voltage at 38A peak impulse current. It protects automotive and industrial DC power lines against ESD, load dump, and ISO 7637-2 transients.
For engineers reviewing the 1.5SMC30CAH datasheet, 1.5SMC30CAH pinout, 1.5SMC30CAH application, or 1.5SMC30CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1μA max leakage at 25.6V working stand-off, and compliance with automotive surge immunity standards including Pulse 1/2a/2b/3a/3b.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast response (<1.0 ps) and low capacitance, enabling effective suppression of high-speed transients without signal distortion. Its bidirectional configuration supports symmetrical clamping in AC-coupled or floating bus applications.
The device operates across –55°C to +150°C junction temperature range, with thermal resistance of 50°C/W (junction-to-ambient) and 15°C/W (junction-to-case), supporting reliable performance in under-hood automotive environments and industrial control cabinets where airflow is limited.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR Min/Max | 28.5 V / 31.5 V - Ensures consistent breakdown initiation across production lots and temperature; guarantees clamping begins no later than 31.5 V under 1 mA test current. |
| VWM | 25.6 V - Maximum continuous reverse operating voltage; defines safe DC bias margin before leakage exceeds 1 μA. |
| VC@IPPM | 41.4 V at 38 A - Clamping voltage during 10/1000 μs surge; determines worst-case overvoltage seen by protected ICs. |
| PPK | 1500 W - Peak pulse power rating per 1 ms waveform; validates robustness against ISO 7637-2 Pulse 5a (load dump). |
| IR@VWM | <1 μA - Ultra-low leakage ensures minimal power loss and no interference with high-impedance sensing circuits. |
| TJ Max | +150 °C - Enables use in engine control units and power converters without derating in high-ambient conditions. |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 7.11 mm × 6.22 mm footprint and matte tin-plated leads compliant with J-STD-002 solderability. |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with two coplanar terminals; polarity indicated by cathode band (not applicable for bidirectional 1.5SMC30CAH - terminals are symmetric and interchangeable).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | Either terminal serves as anode or cathode depending on instantaneous polarity of surge; no orientation required during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM, ensuring reliability in vehicle ECUs. |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Guarantees functional immunity to common automotive electrical disturbances without external filtering or additional protection stages. |
| Glass passivated junction | Provides stable VBR tolerance and long-term leakage stability under humidity and thermal cycling stress. |
| Moisture sensitivity level 1 | Eliminates need for dry-pack handling or bake-out prior to reflow, simplifying SMT line integration and reducing manufacturing cost. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally compliant end-of-life disposal and recycling. |
Applications
| Automotive Power Line Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: 12 V battery rail in body control module exposed to load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed upstream of LDO regulators and microcontrollers. Use Value: Limits transient overvoltage to ≤41.4 V during 38 A ISO 7637-2 Pulse 5a events, preventing latch-up or gate oxide damage in downstream ICs. |
Use Scenario: CAN_H/CAN_L differential pair in factory automation node subjected to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Symmetrical transient suppressor across differential bus lines to maintain signal integrity during ±8 kV contact ESD. Use Value: Sub-1 ps response preserves CAN bit timing; <1 μA leakage avoids DC bias shift on termination resistors. |
| Telecom DC Power Input | Renewable Energy Charge Controller |
Use Scenario: 24 V input stage of PoE-powered access point encountering lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input before DC-DC converter and Ethernet PHY. Use Value: 1500 W peak power rating absorbs multi-kA induced currents without failure, maintaining system uptime. |
Use Scenario: Solar panel input of MPPT charge controller facing rapid voltage reversals and grid-switching transients. IC Role / Device Role / Timing Role: Reverse-polarity and surge protector between PV array and buck converter input. Use Value: Bidirectional operation blocks both positive and negative transients while sustaining 1500 W pulses without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA | Same 30 V VBR range and bidirectional configuration, but lower 600 W PPK rating in smaller DO-214AA (SMB) package. | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); insufficient for ISO 7637-2 Pulse 5a. | Select SMBJ30CA only when space constraints prohibit SMC footprint and surge energy is confirmed ≤600 W. |
| 1.5KE30CA | Through-hole TO-204AA (DO-41) package with identical 30 V VBR, 41.4 V VC, and 1500 W rating, but slower thermal response and no AEC-Q101 qualification. | Not suitable for automated SMT lines or automotive under-hood applications requiring vibration resistance and high-temp reliability. | Choose 1.5KE30CA only for prototyping or legacy through-hole designs where reflow compatibility and automotive qualification are not required. |
Compared with SMBJ30CA and 1.5KE30CA, the 1.5SMC30CAH uniquely combines 1500 W surge capability, AEC-Q101 qualification, DO-214AB SMT compatibility, and ISO 7637-2 compliance-making it the only option qualified for volume automotive power rail protection.
Availability
1.5SMC30CAH is available at Aetrix Electronics and suitable for automotive ECUs, industrial CAN nodes, telecom power inputs, and renewable energy controllers requiring stable component supply and full AEC-Q101 traceability.
Supply support for 1.5SMC30CAH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in high-reliability protection devices and power management components.
The 1.5SMC series was designed specifically for automotive-grade transient suppression, targeting ISO 7637-2 compliance and AEC-Q101 qualification in surface-mount form factors for engine control, body electronics, and ADAS subsystems.
FAQ
What does the 'CAH' suffix indicate in 1.5SMC30CAH?
The 'CAH' suffix denotes a bidirectional configuration with AEC-Q101 qualification and halogen-free construction. Unlike unidirectional 'H' variants, 1.5SMC30CAH provides symmetrical clamping for AC or floating-bus applications, and its 'A' indicates tighter VBR tolerance (±5% vs. ±10% for 'H'). The 1.5SMC30CAH meets JESD201 Class 2 whisker resistance and moisture sensitivity level 1.
How does 1.5SMC30CAH differ from unidirectional 1.5SMC30H?
The 1.5SMC30CAH is bidirectional and clamps transients of either polarity, while the 1.5SMC30H is unidirectional and only clamps reverse-polarity surges. The 1.5SMC30CAH has higher leakage (1 μA @ 25.6 V) versus 1.5SMC30H's 1 μA @ 24.3 V, and uses different marking codes (ERJ vs. EQJ). Both share identical 1500 W PPK, DO-214AB package, and AEC-Q101 qualification.
Is 1.5SMC30CAH suitable for protecting a 24 V CAN FD bus?
Yes - the 1.5SMC30CAH is widely deployed on 24 V CAN FD interfaces due to its 25.6 V VWM, which provides 1.6 V margin above nominal bus voltage, and its 41.4 V VC, which stays below typical CAN transceiver absolute maximum ratings. Its sub-1 ps response preserves signal edge integrity, and bidirectional operation handles common-mode transients without polarity concerns. The 1.5SMC30CAH also meets ISO 7637-2 Pulse 3b for data line immunity.
What is the maximum allowable PCB trace length between 1.5SMC30CAH and protected IC?
To preserve clamping effectiveness, PCB trace inductance must be minimized: total loop inductance (including ground return) should remain below 10 nH. For typical 1 oz copper, this corresponds to ≤5 mm straight trace length from 1.5SMC30CAH cathode/anode to IC pins, with direct low-inductance grounding via multiple vias to inner ground plane. Longer traces degrade clamping speed and increase overshoot - verified in TSC application note AN-152 for 1.5SMC30CAH layout guidelines.
Does 1.5SMC30CAH require derating at elevated ambient temperatures?
Yes - the 1.5SMC30CAH must be derated per Fig.2 in the datasheet: at 85°C ambient, its 1500 W PPK rating drops to ~950 W, and at 125°C, it falls to ~550 W. This is due to junction-to-ambient thermal resistance (RθJA = 50°C/W). For sustained high-temp operation, ensure adequate copper area (≥100 mm² per pad) and consider parallel devices only if validated per TSC's thermal derating curves - the 1.5SMC30CAH datasheet specifies no derating for VBR or VC within –55°C to +150°C.
1.5SMC30CAH 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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 38A
- 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)
1.5SMC30CAH FAQ
1.How can I place an order for 1.5SMC30CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30CAH 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 1.5SMC30CAH reliable?
The price and inventory of 1.5SMC30CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC30CAH is usually 5 days.
3.What payment methods are accepted for 1.5SMC30CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30CAH?
1.5SMC30CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30CAH 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 1.5SMC30CAH?
For technical support, including 1.5SMC30CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30CAH requirements.
6.How does Aetrix verify that 1.5SMC30CAH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30CAH 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 1.5SMC30CAH meets industry standards.
7.What is the process for return or replacement of 1.5SMC30CAH?
All 1.5SMC30CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30CAH, 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 1.5SMC30CAH part is unused and in its original packaging.
Return procedure for 1.5SMC30CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC30CAH 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
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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…
