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Taiwan Semiconductor Corporation 1.5SMC27
- Part No.:
- 1.5SMC27
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27.pdf
- Description:
- 1500W, 27V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,323
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Product details
Overview
1.5SMC27 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 24.3–29.7V breakdown voltage (VBR), and 39.1V maximum clamping voltage (VC) at 40A peak impulse current. It protects DC power rails and signal lines in telecom and industrial equipment against ESD and lightning-induced transients.
For engineers reviewing the 1.5SMC27 datasheet, 1.5SMC27 pinout, 1.5SMC27 application, or 1.5SMC27 equivalent, this page delivers verified electrical specs, thermal resistance (RθJA = 50°C/W), clamping performance, RoHS/halogen-free compliance, and ISO 7637-2 Pulse 1/2a/2b/3a/3b validation - all critical for automotive and industrial surge protection design.
Technical Context
The 1.5SMC27 operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1.0 ps) and low leakage (<1 µA at 21.8 V). Its clamping action limits transient voltages to ≤39.1 V under 40 A 10/1000 µs waveform, while maintaining stable VBR temperature coefficient of 0.096 %/°C.
Designed for surface-mount automation, it features matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. The DO-214AB case meets UL 94V-0 flammability rating and supports junction temperatures from –55°C to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 24.3 V / 29.7 V - defines reliable avalanche initiation range under 1 mA test current |
| VWM | 21.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC@IPPM | 39.1 V @ 40 A - clamping voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPK | 1500 W - peak pulse power handling per single non-repetitive transient event |
| RθJA | 50 °C/W - junction-to-ambient thermal resistance, critical for PCB copper area sizing |
| TJ max | +150 °C - maximum allowable junction temperature for sustained reliability |
| IR @ VWM | <1 µA - ensures minimal standby power loss in always-on circuits |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case material meets UL 94V-0; weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to protected line's ground or low-side reference; carries full surge current during clamping |
| Cathode | Protected circuit connection | Connected to the node requiring overvoltage protection (e.g., DC input rail); clamps to VC when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under repeated surge stress |
| Response time <1.0 ps | Clamps transients before sensitive logic or analog circuitry sustains damage |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and inductive-switching immunity testing |
| Moisture sensitivity level 1 (J-STD-020) | Zero bake requirement prior to reflow; compatible with standard SMT assembly lines |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental regulations without compromising surge robustness |
Applications
| Telecom Power Input Protection | Industrial PLC I/O Module |
|---|---|
Use Scenario: Protecting 24 V DC power input of VoIP gateways and base station radios from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between input rail and chassis ground to clamp positive transients. Use Value: Limits voltage to ≤39.1 V during 40 A surge, preventing damage to upstream DC-DC converters and PMICs. | Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Standoff protection device across channel inputs, absorbing repetitive 10/1000 µs pulses up to 1500 W peak. Use Value: Maintains <1 µA leakage at 21.8 V, ensuring accurate logic-level sensing while surviving >100,000 surge events. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
Use Scenario: Suppressing load-dump transients on 12 V supply lines feeding BCM microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail, coordinated with upstream fuses and secondary LC filtering. Use Value: Meets ISO 7637-2 Pulse 5a requirements with 39.1 V clamping, preserving MCU reset integrity and CAN bus timing. | Use Scenario: Shielding H-bridge gate drivers in washing machine motor inverters from inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Fast-acting unidirectional clamp across low-side MOSFET source-drain path. Use Value: Responds in <1.0 ps to limit voltage overshoot to safe levels, preventing gate oxide rupture and shoot-through failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A (Bourns) | Same DO-214AA (SMB) package; lower PPK = 600 W; VC = 43.5 V @ 13.8 A | Lower energy handling; suitable only for lighter-duty consumer-grade transients | Select SMBJ27A only if system-level surge stress is limited to IEC 61000-4-5 Level 2 (0.5 kV) |
| 1.5KE27 (ON Semiconductor) | Through-hole DO-15 package; same VBR range; VC = 41.5 V @ 36.2 A; PPK = 1500 W | Requires PCB through-hole layout; incompatible with automated SMT assembly | Choose 1.5KE27 only for legacy designs or prototyping where reflow compatibility is not required |
Compared with SMBJ27A and 1.5KE27, the 1.5SMC27 uniquely combines SMT-compatible DO-214AB packaging, 1500 W capability, and 39.1 V clamping - making it optimal for high-reliability industrial and automotive SMT production where board space, surge margin, and assembly efficiency are jointly constrained.
Availability
1.5SMC27 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive body control modules requiring stable component supply, full RoHS/halogen-free compliance, and ISO 7637-2 validated surge immunity.
Supply support for 1.5SMC27 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, including TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q200 qualified product lines.
The 1.5SMC27 belongs to TSC's SMC-family of high-power surface-mount TVS diodes, engineered specifically for robust transient suppression in automotive, industrial, and telecom systems where automated assembly and stringent EMC compliance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC27 under maximum rated surge current?
The 1.5SMC27 exhibits a maximum clamping voltage (VC) of 39.1 V when subjected to its rated peak impulse current (IPPM) of 40 A using the standardized 10/1000 µs waveform. This value is measured at TA = 25°C and ensures downstream components remain within safe operating voltage limits during transient events.
Is the 1.5SMC27 suitable for bidirectional transient protection?
No - the 1.5SMC27 is a unidirectional TVS diode intended for DC line protection with defined anode/cathode polarity. For bidirectional applications, specify the 1.5SMC27C or 1.5SMC27CA variant, which provide symmetrical clamping in both polarities and use the same DO-214AB package.
Does the 1.5SMC27 meet automotive surge immunity standards?
Yes - the 1.5SMC27 is explicitly validated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test profiles, covering common automotive transient threats including supply disconnection, inductive load switching, and capacitive coupling. Its 1500 W rating and 39.1 V clamping support robust design for body control and infotainment modules.
What is the maximum steady-state power dissipation for the 1.5SMC27?
The 1.5SMC27 has a steady-state power dissipation (PD) rating of 6.5 W at TA = 25°C. This value applies only to continuous DC or low-frequency conditions - not transient events - and must be derated linearly above 25°C using the specified RθJA = 50°C/W thermal resistance.
How does the 1.5SMC27 compare to the 1.5SMC27A variant?
The 1.5SMC27A offers tighter VBR tolerance (25.7–28.4 V vs. 24.3–29.7 V for 1.5SMC27) and slightly lower clamping voltage (37.5 V vs. 39.1 V at 42 A), due to enhanced process control. Both share identical package, thermal specs, and surge ratings; the 'A' suffix denotes improved parametric consistency for precision-sensitive applications.
1.5SMC27 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):
- 21.8V
- Voltage - Breakdown (Min):
- 24.3V
- Voltage - Clamping (Max) @ Ipp:
- 39.1V
- Current - Peak Pulse (10/1000µs):
- 40A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC27 FAQ
1.How can I place an order for 1.5SMC27 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27 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 1.5SMC27 reliable?
The price and inventory of 1.5SMC27 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC27 is usually 5 days.
3.What payment methods are accepted for 1.5SMC27?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27?
1.5SMC27 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27 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 1.5SMC27?
For technical support, including 1.5SMC27 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27 requirements.
6.How does Aetrix verify that 1.5SMC27 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27 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 1.5SMC27 meets industry standards.
7.What is the process for return or replacement of 1.5SMC27?
All 1.5SMC27 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27, 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 1.5SMC27 part is unused and in its original packaging.
Return procedure for 1.5SMC27:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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