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Taiwan Semiconductor Corporation 1.5SMC24AH
- Part No.:
- 1.5SMC24AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24AH.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,692
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Product details
Overview
1.5SMC24AH 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 22.8V to 25.2V breakdown voltage (VBR), 20.5V working stand-off voltage (VWM), 33.2V maximum clamping voltage (VC) at 47A peak pulse current, and 1500W peak pulse power rating - enabling robust ESD and lightning surge immunity in automotive and industrial interfaces.
For engineers reviewing the 1.5SMC24AH datasheet, 1.5SMC24AH pinout, 1.5SMC24AH application, or 1.5SMC24AH equivalent, this device is evaluated for DC power line protection, CAN bus front-end clamping, and I/O port hardening where fast response (<1.0 ps), low leakage (<1 µA at 20.5V), and AEC-Q101 qualification are required.
Technical Context
The 1.5SMC24AH operates as a silicon avalanche diode with glass-passivated junction, delivering unidirectional clamping action triggered above its VBR threshold. Its DO-214AB (SMC) package supports automated placement and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards.
It complies with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive transients and exhibits a 0.094%/°C temperature coefficient of VBR, ensuring stable clamping across –55°C to +150°C junction temperature range. Thermal resistance is 15°C/W (junction-to-case) and 50°C/W (junction-to-ambient).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8V / 25.2V - defines reliable avalanche initiation window under 1mA test current; ensures consistent turn-on across production lots |
| VWM | 20.5V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below breakdown |
| VC @ IPPM | 33.2V at 47A - clamped voltage during 10/1000µs surge; limits downstream IC stress to sub-34V level |
| PPK | 1500W - peak pulse power handling per 1ms waveform; supports high-energy transients like load dump or EFT |
| IR @ VWM | <1 µA - ultra-low reverse leakage at rated stand-off; avoids parasitic loading on sensitive analog or low-power circuits |
| TJ max | +150°C - maximum junction temperature; enables operation in under-hood automotive or enclosed industrial enclosures |
| Response time | <1.0 ps - intrinsic avalanche speed; provides near-instantaneous clamping without delay-induced overshoot |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0; matte tin-plated leads comply with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; completes clamping path during reverse surge |
| Cathode | Protected-line input terminal | Connected to line under protection (e.g., 24V rail or CAN_H); conducts avalanche current when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - suitable for engine control, body modules, and ADAS power domains |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives; critical for high-humidity environments |
| ISO 7637-2 compliance | Withstands standardized automotive transient waveforms (Pulse 1, 2a, 2b, 3a, 3b) without degradation - eliminates need for external filtering |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly lines without floor-life constraints |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives - supports green manufacturing and export compliance |
Applications
| Automotive Power Rail Protection | CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: Protecting 24V supply inputs in vehicle ECUs against load dump and jump-start surges. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point, shunting surge energy to chassis ground. Use Value: Limits voltage excursion to ≤33.2V during 1500W transients, preventing damage to downstream DC-DC converters and microcontrollers. |
Use Scenario: Hardening CAN_H/CAN_L differential pair against ESD and inductive switching noise in body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS on each line referenced to ground; activated only during positive-going transients exceeding 20.5V. Use Value: Maintains signal integrity by clamping <1.0 ps after surge onset, avoiding bit errors while adding <1 pF junction capacitance. |
| Industrial Sensor Interface Protection | Telecom DC Input Stage |
|
Use Scenario: Safeguarding 4–20 mA loop-powered sensors connected to PLC analog inputs from field wiring transients. IC Role / Device Role / Timing Role: Series-connected TVS on loop supply line, absorbing induced surges before reaching precision current-sense amplifier. Use Value: Withstands repeated 47A pulses without parameter shift, ensuring long-term calibration stability in factory automation systems. |
Use Scenario: Securing –48V telecom rectifier outputs against lightning-induced surges entering central office equipment. IC Role / Device Role / Timing Role: Standoff-rated TVS on output rail, conducting only during overvoltage events while remaining invisible to normal regulation. Use Value: Delivers 1500W surge capacity with <1 µA leakage at –20.5V, eliminating standby power loss and thermal drift in redundant power systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Same DO-214AA package; lower PPK = 600W; VC = 38.9V @ 15.4A | Insufficient for ISO 7637-2 Pulse 5a (load dump); limited to lower-energy I/O protection | Select when space-constrained layouts require smaller SMB footprint and surge energy is ≤600W |
| 1.5KE24A | Through-hole DO-15 package; identical VBR/VC specs but higher thermal resistance (RθJA = 60°C/W) | Not suitable for high-density SMT designs; requires wave soldering and board real estate | Choose only for legacy through-hole assemblies or prototyping where reflow compatibility is not required |
Compared with SMBJ24A and 1.5KE24A, the 1.5SMC24AH delivers 2.5× higher surge power in an SMT-optimized package with superior thermal performance (RθJC = 15°C/W), making it the preferred choice for AEC-Q101-compliant 24V automotive and industrial power rail protection.
Availability
1.5SMC24AH is available at Aetrix Electronics and suitable for automotive power rail protection, CAN bus interface hardening, and industrial sensor interface safeguarding requiring stable component supply and full AEC-Q101 traceability.
Supply support for 1.5SMC24AH 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 automotive and industrial certifications.
The 1.5SMC24AH belongs to TSC's AEC-Q101-qualified SMC-family TVS portfolio, engineered specifically for high-reliability DC power line and data line surge suppression in harsh electromagnetic environments.
FAQ
What is the polarity configuration of the 1.5SMC24AH?
The 1.5SMC24AH is a unidirectional TVS diode with cathode band marking indicating the protected line terminal. Its anode connects to ground, and cathode connects to the line under protection - enabling clamping only during positive transients relative to ground. This configuration matches standard 24V DC system grounding schemes and avoids forward conduction during normal operation.
Does the 1.5SMC24AH meet automotive qualification standards?
Yes, the 1.5SMC24AH is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient waveforms. It is rated for operation from –55°C to +150°C junction temperature and manufactured under TS 16949-compliant processes - confirming suitability for engine bay, transmission control, and body electronics applications.
How does the 1.5SMC24AH compare to bidirectional variants like 1.5SMC24CAH?
The 1.5SMC24AH provides unidirectional clamping optimized for DC power rails, whereas 1.5SMC24CAH offers symmetrical clamping for AC or differential signal lines. The 1.5SMC24AH has lower leakage (<1 µA at 20.5V) and tighter VBR tolerance than its bidirectional counterpart, making it preferable for single-polarity protection where reverse conduction must be avoided.
What is the maximum surge current the 1.5SMC24AH can handle?
The 1.5SMC24AH sustains a peak impulse current (IPPM) of 47A under the standard 10/1000µs double-exponential waveform. This corresponds to its 1500W peak pulse power rating at VC = 33.2V. Derating applies above 25°C ambient per Fig.2 in the datasheet, with usable IPPM decreasing to ~35A at 85°C ambient.
Is the 1.5SMC24AH compatible with lead-free reflow soldering processes?
Yes, the 1.5SMC24AH uses matte tin-plated leads compliant with J-STD-002 and is rated for moisture sensitivity level 1 (MSL-1), meaning it may be stored indefinitely at ≤30°C/85% RH without baking. It supports standard Pb-free reflow profiles up to 260°C peak temperature, with no special handling required prior to assembly.
1.5SMC24AH 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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 47A
- 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)
1.5SMC24AH FAQ
1.How can I place an order for 1.5SMC24AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24AH 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 1.5SMC24AH reliable?
The price and inventory of 1.5SMC24AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC24AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC24AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24AH?
1.5SMC24AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24AH 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 1.5SMC24AH?
For technical support, including 1.5SMC24AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24AH requirements.
6.How does Aetrix verify that 1.5SMC24AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24AH 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 1.5SMC24AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC24AH?
All 1.5SMC24AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24AH, 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 1.5SMC24AH part is unused and in its original packaging.
Return procedure for 1.5SMC24AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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