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Taiwan Semiconductor Corporation 1.5SMC43AH
- Part No.:
- 1.5SMC43AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43AH.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,193
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Product details
Overview
1.5SMC43AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 40.9V–45.2V breakdown voltage at 1mA test current, and 59.3V maximum clamping voltage at 26A peak impulse current. It protects automotive and industrial power rails against ESD, load dump, and lightning-induced transients.
For engineers reviewing the 1.5SMC43AH datasheet, 1.5SMC43AH pinout, 1.5SMC43AH application, or 1.5SMC43AH equivalent, key selection criteria include working stand-off voltage (36.8V), low leakage (<1µA at VWM), AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and thermal resistance (RθJA = 50°C/W).
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1.0ps) and stable clamping under repetitive surge conditions. Its single-die construction and DO-214AB package support automated placement and meet JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
The device operates across –55°C to +150°C junction temperature range with 15°C/W junction-to-case thermal resistance. It delivers 1500W peak pulse power per 1ms waveform (per Fig.5), derating linearly above 25°C ambient per Fig.2, and maintains <1µA blocking leakage above 10V working stand-off voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 40.9V / 45.2V at 1mA - defines minimum and maximum guaranteed breakdown threshold for reliable overvoltage triggering |
| VWM | 36.8V - maximum continuous DC or RMS operating voltage before significant leakage begins |
| VC @ IPPM | 59.3V at 26A - clamping voltage during worst-case 1ms surge, limiting downstream voltage stress |
| PPK | 1500W - peak transient power handling capability per standard 1ms pulse, critical for load-dump immunity |
| IR @ VWM | <1µA - ultra-low reverse leakage ensures minimal standby power loss in battery-backed systems |
| TJ max | +150°C - enables operation in under-hood automotive environments and high-temperature industrial enclosures |
| RθJA | 50°C/W - thermal resistance from junction to ambient, used to calculate safe power derating at elevated temperatures |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210g. Meets UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference; carries full surge current during clamping |
| Cathode | Protected line connection | Connected to the rail being protected (e.g., 24V supply); voltage referenced to anode during conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per stress test plan |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Glass passivated junction | Enhances long-term stability of VBR and leakage performance under humidity and thermal cycling |
| Fast response time | <1.0ps - ensures clamping initiates before sensitive downstream ICs experience damaging overvoltage |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24V supply lines in body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and point-of-load regulator input. Use Value: Limits transient voltage to ≤59.3V, preventing damage to 36V-rated DC-DC controllers and ensuring ASIL-B system integrity. |
Use Scenario: Shielding digital input channels on programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Front-end protection element on 24V optocoupler input circuits. Use Value: Absorbs >1500W pulses without degradation, maintaining signal integrity during factory floor ESD events and motor switching noise. |
| Telecom Power Interface | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding PoE-powered equipment front-ends from Ethernet cable-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48V DC input stage upstream of DC-DC conversion. Use Value: Clamps within 1ps to hold voltage below 60V, preserving IEEE 802.3af/at compliance and avoiding latch-up in PMICs. |
Use Scenario: Suppressing commutation spikes on BLDC motor driver power rails in smart home appliances. IC Role / Device Role / Timing Role: Rail-to-ground TVS on 36V bus feeding gate drivers and current sense amplifiers. Use Value: Handles 26A peak impulse without parametric shift, enabling compact heatsinkless design in space-constrained white goods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | Lower peak power (600W), same VBR range (40.9–45.2V), SMB package (smaller footprint, higher RθJA) | Not suitable for ISO 7637-2 Pulse 5a (load dump); limited to lower-energy transients | Select when board space is constrained and surge energy is ≤600W; verify thermal margin with RθJA = 85°C/W |
| 1.5KE43A | Through-hole TO-204AA (DO-41), identical electrical specs but no AEC-Q101 or ISO 7637-2 validation | Requires manual assembly; not qualified for automotive or harsh industrial environments | Use only in cost-sensitive, non-automotive applications where automated SMT is unavailable |
Compared with 1.5SMC43AH, SMBJ43A trades surge capacity for size, while 1.5KE43A sacrifices qualification and mounting method-neither offers drop-in replacement capability due to package or certification mismatch.
Availability
1.5SMC43AH is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply and AEC-Q101-compliant transient protection.
Supply support for 1.5SMC43AH 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, serving global automotive, industrial, and consumer markets since 1979.
The 1.5SMCxxAH series was developed specifically for AEC-Q101-compliant, high-power surface-mount TVS protection in automotive power distribution and industrial automation, emphasizing robustness, repeatability, and process-controlled parametric consistency.
FAQ
What is the clamping voltage of the 1.5SMC43AH under maximum rated surge current?
The 1.5SMC43AH has a maximum clamping voltage (VC) of 59.3V at 26A peak impulse current (IPPM), measured per the 10/1000μs waveform defined in Fig.5 of the datasheet. This value ensures downstream components see no more than 59.3V during worst-case transient events, making it suitable for protecting 36V-rated power management ICs in automotive applications. The 1.5SMC43AH maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC43AH suitable for bidirectional transient protection?
No, the 1.5SMC43AH is a unidirectional TVS diode intended for DC rail protection with defined anode-cathode polarity. For bidirectional applications such as AC lines or data bus protection, Taiwan Semiconductor specifies the 1.5SMC43CAH variant (with CAH suffix). Using the 1.5SMC43AH in reverse-biased configurations may result in premature failure or undefined clamping behavior, as its electrical characteristics apply only in the forward direction.
Does the 1.5SMC43AH meet automotive qualification standards?
Yes, the 1.5SMC43AH is AEC-Q101 qualified and tested per the full stress test schedule including HTGB, HTRB, TCT, and ESD. It also meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, confirming suitability for use in automotive power networks such as body control modules, infotainment power supplies, and ADAS sensor interfaces. The 1.5SMC43AH's qualification documentation is available upon request from Taiwan Semiconductor.
What is the maximum steady-state power dissipation for the 1.5SMC43AH?
The 1.5SMC43AH has a steady-state power dissipation (PD) rating of 6.5W at 25°C ambient temperature. This value applies only to continuous DC or low-frequency AC power dissipation-not transient events-and must be derated linearly above 25°C using the specified RθJA of 50°C/W. In practice, the 1.5SMC43AH is not operated continuously at PD; its primary function is short-duration surge absorption, where 1500W peak power applies.
How does the 1.5SMC43AH compare to the 1.5SMC43H variant?
The 1.5SMC43AH offers tighter breakdown voltage tolerance (40.9–45.2V) versus the 1.5SMC43H (38.7–47.3V), resulting in more predictable clamping onset and reduced risk of false triggering near the working stand-off voltage. Both share identical package, power rating, and qualification status, but the "A" grade provides enhanced parametric consistency required for safety-critical automotive subsystems. The 1.5SMC43AH marking code is EZJ.
1.5SMC43AH 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 26A
- 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)
1.5SMC43AH FAQ
1.How can I place an order for 1.5SMC43AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43AH 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 1.5SMC43AH reliable?
The price and inventory of 1.5SMC43AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC43AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43AH?
1.5SMC43AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43AH 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 1.5SMC43AH?
For technical support, including 1.5SMC43AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43AH requirements.
6.How does Aetrix verify that 1.5SMC43AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43AH 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 1.5SMC43AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC43AH?
All 1.5SMC43AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43AH, 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 1.5SMC43AH part is unused and in its original packaging.
Return procedure for 1.5SMC43AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43AH Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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