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Taiwan Semiconductor Corporation 1.5SMC75CH
- Part No.:
- 1.5SMC75CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC75CH.pdf
- Description:
- 1500W, 75V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,886
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Product details
Overview
1.5SMC75CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 75V breakdown voltage (min 67.5V, max 82.5V at 1mA), and clamps to ≤108V at 14A peak impulse current - used for ESD and surge protection on DC power rails and signal lines in automotive infotainment and industrial control interfaces.
For engineers reviewing the 1.5SMC75CH datasheet, 1.5SMC75CH pinout, 1.5SMC75CH application, or 1.5SMC75CH equivalent, this page delivers verified electrical specs, thermal resistance data (RθJA = 50°C/W), ISO 7637-2 compliance status, polarity marking convention, and AEC-Q101 qualification evidence - all specific to the CH-suffix bidirectional variant.
Technical Context
This bidirectional TVS operates symmetrically in both polarities with identical VBR, VWM, and VC characteristics in forward and reverse directions. Its glass-passivated junction ensures stable clamping performance under repetitive transients, and it meets ISO 7637-2 Pulse 1/2a/2b/3a/3b waveforms for automotive load-dump and inductive switching immunity.
Designed for surface-mount automation, the device features matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Its 0.210g mass and UL 94V-0 molding compound support high-reliability board-level integration in space-constrained environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 67.5V / 82.5V @ IT = 1mA - defines reliable conduction onset across temperature and unit variation |
| VWM | 60.7V - maximum continuous DC or RMS voltage the device blocks without leakage exceeding 1µA |
| VC @ IPPM | ≤108V @ 14A (10/1000µs waveform) - peak clamped voltage seen by protected circuit during worst-case surge |
| PPK | 1500W - peak non-repetitive surge power handling capability per IEEE C62.35 standard |
| RθJA | 50°C/W - junction-to-ambient thermal resistance determines derating above 25°C ambient |
| TJ range | –55°C to +150°C - operational junction temperature window compatible with under-hood automotive use |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Case molded per UL 94V-0; polarity not applicable - terminals are interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals conduct identically during positive or negative surges - no orientation required during placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - supports PPAP and functional safety-aware designs |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (line transients) without degradation |
| Fast response time | <1.0ps - limits voltage overshoot before clamping engages, critical for protecting fast logic and analog inputs |
| Low leakage | <1µA @ VWM - avoids parasitic loading on low-power sensor or communication lines |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow - simplifies SMT line logistics |
Applications
| Automotive Body Control Module | Industrial CAN Transceiver Protection |
|---|---|
Use Scenario: Protecting LIN bus interface pins against battery dump and alternator load dump transients in door module ECUs. IC Role / Device Role: Bidirectional clamping element placed between LIN line and ground, shunting energy away from transceiver input. Use Value: Maintains signal integrity below 108V clamping threshold while surviving 1500W pulses - eliminates need for external series impedance or RC filtering. |
Use Scenario: Safeguarding CANH/CANL pins of isolated CAN transceivers in factory automation PLC I/O modules. IC Role / Device Role: Primary surge suppression device mounted directly at connector entry point, referenced to chassis ground. Use Value: Symmetrical clamping ensures equal protection for both differential lines without polarity concerns - enables single-component solution for full-duplex bus protection. |
| Telecom Power Input Stage | Medical Diagnostic Sensor Interface |
Use Scenario: Guarding 48V DC input rails of PoE-powered network switches against lightning-induced surges on building wiring. IC Role / Device Role: First-line transient absorber upstream of DC-DC converter input, sized for 1500W unidirectional or bidirectional events. Use Value: 60.7V working voltage allows operation across full 48V ±10% range while clamping to 108V - prevents overvoltage damage to downstream regulators. |
Use Scenario: Shielding analog front-end inputs of portable ultrasound probe interfaces from ESD events during clinical handling. IC Role / Device Role: Low-capacitance (<100pF typical) TVS placed adjacent to ADC input pins, grounded to clean analog plane. Use Value: Sub-1µA leakage at 60.7V stand-off preserves signal-to-noise ratio in µV-level sensor signals - avoids DC offset drift or gain error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA (Bourns) | Same DO-214AA (SMB) package; lower PPK = 600W; VC = 121V @ 5A | Lower power rating limits use to sub-1kW surge environments; less suitable for ISO 7637-2 Pulse 5a (load dump) | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/5 only |
| SMCJ75CA (Littelfuse) | DO-214AB (SMC) package; PPK = 1500W; VC = 121V @ 12.3A - higher clamping voltage than 1.5SMC75CH's 108V | Higher clamping increases risk of overvoltage stress on protected ICs with narrow VCC tolerance | Prefer 1.5SMC75CH where downstream ICs require tighter clamping margin (e.g., 3.3V or 5V logic rails) |
Compared with SMBJ75CA and SMCJ75CA, the 1.5SMC75CH delivers superior clamping performance (108V vs. ≥121V) at equal 1500W rating and AEC-Q101 qualification - making it optimal for automotive and industrial systems demanding lowest possible let-through voltage during transients.
Availability
1.5SMC75CH is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN networks, telecom power inputs, and medical sensor interfaces requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC75CH 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 - headquartered in Hsinchu Science Park with global distribution and AEC-Q101 validation labs.
The 1.5SMCxxCH series belongs to TSC's automotive-qualified surface-mount TVS platform, engineered specifically for robust transient immunity in harsh environments - emphasizing low clamping voltage, fast response, and process consistency for zero-defect manufacturing.
FAQ
What does the "CH" suffix indicate in 1.5SMC75CH?
The "CH" suffix denotes a bidirectional configuration with symmetrical clamping behavior in both polarities. Unlike unidirectional variants (e.g., 1.5SMC75H), the 1.5SMC75CH has no cathode marking and functions identically for positive and negative transients - essential for protecting AC-coupled or differential signal lines like CAN or LIN buses.
Is 1.5SMC75CH AEC-Q101 qualified, and what tests does that include?
Yes, 1.5SMC75CH is AEC-Q101 qualified. This includes stress testing for high-temperature reverse bias (HTRB), temperature cycling (TC), highly accelerated stress test (HAST), and electrostatic discharge (ESD) per human-body model (HBM) and machine model (MM). Qualification confirms suitability for automotive under-hood and cabin applications per industry reliability standards.
What is the maximum clamping voltage of 1.5SMC75CH, and under what test condition is it specified?
The maximum clamping voltage of 1.5SMC75CH is 108V, measured at 14A peak pulse current using the standardized 10/1000µs double-exponential waveform per IEC 61000-4-5 and ANSI/IEEE C62.35. This value represents the upper limit of voltage imposed on the protected circuit during worst-case surge events.
How does 1.5SMC75CH meet ISO 7637-2, and which pulses are covered?
The 1.5SMC75CH meets ISO 7637-2 for Pulses 1 (inductive switch-off), 2a/2b (battery disconnection), and 3a/3b (capacitive coupling and line impedance transients). Its 1500W peak power rating and low clamping voltage ensure compliance without additional external components - validated per test setup defined in the standard.
What is the thermal resistance profile of 1.5SMC75CH, and how does it affect layout design?
1.5SMC75CH has RθJA = 50°C/W and RθJC = 15°C/W. This means copper pad area and thermal vias significantly impact power derating: at 70°C ambient, its usable peak power drops to ~900W. Layout must provide ≥40 mm² of 2-oz copper connected via ≥4 thermal vias to internal ground planes to sustain full 1500W capability.
1.5SMC75CH 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):
- 60.7V
- Voltage - Breakdown (Min):
- 67.5V
- Voltage - Clamping (Max) @ Ipp:
- 108V
- Current - Peak Pulse (10/1000µs):
- 14A
- 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)
1.5SMC75CH FAQ
1.How can I place an order for 1.5SMC75CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC75CH 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 1.5SMC75CH reliable?
The price and inventory of 1.5SMC75CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC75CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC75CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC75CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC75CH?
1.5SMC75CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC75CH 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 1.5SMC75CH?
For technical support, including 1.5SMC75CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC75CH requirements.
6.How does Aetrix verify that 1.5SMC75CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC75CH 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 1.5SMC75CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC75CH?
All 1.5SMC75CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC75CH, 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 1.5SMC75CH part is unused and in its original packaging.
Return procedure for 1.5SMC75CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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