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Taiwan Semiconductor Corporation 1.5SMC39CA
- Part No.:
- 1.5SMC39CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39CA.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,620
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Product details
Overview
1.5SMC39CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 39V working stand-off voltage (VWM = 33.3 V), 41.0–45.2 V breakdown voltage (VBR), 1500 W peak pulse power (PPK), and clamps transients to ≤53.9 V at 29 A IPPM - deployed in telecom interface protection, industrial I/O modules, and automotive body control units.
For engineers reviewing the 1.5SMC39CA datasheet, 1.5SMC39CA pinout, 1.5SMC39CA application, or 1.5SMC39CA equivalent, key selection criteria include bidirectional clamping capability, DO-214AB (SMC) package compatibility, sub-1 ps response time, low leakage (<1 µA @ 33.3 V), and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive transient immunity.
Technical Context
The 1.5SMC39CA operates as a bipolar avalanche diode with symmetrical forward and reverse conduction characteristics, enabling bidirectional ESD and surge suppression without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5% for 'A' grade) and low temperature coefficient (0.100 %/°C), critical for thermal stability across -55°C to +150°C operating range.
It delivers 1500 W peak pulse power per 10/1000 µs waveform (per Fig.5), with junction-to-case thermal resistance of 15 °C/W and 50 °C/W junction-to-ambient - supporting reliable power dissipation in high-density SMT layouts. Clamping performance is validated at IT = 1.0 mA and IPPM = 29 A, with VC held to 53.9 V maximum.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VBR min/max | 37.1 V / 41.0 V @ IT = 1.0 mA - tight breakdown window ensures predictable turn-on during transients |
| VC @ IPPM | ≤53.9 V @ 29 A - limits downstream voltage stress to safe levels for 3.3 V/5 V/12 V logic and analog circuits |
| PPK | 1500 W - handles high-energy surges such as ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 3b (ESD) |
| IR @ VWM | <1 µA - negligible standby current avoids battery drain or signal integrity degradation in always-on systems |
| Response time | <1.0 ps - enables effective suppression of fast-rising ESD events (IEC 61000-4-2) before IC damage occurs |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.11 mm × 6.22 mm footprint and matte tin leads |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with center cathode band marking; bidirectional symmetry means both terminals are functionally identical - no anode/cathode distinction required for 1.5SMC39CA operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bidirectional surge port | Connects to protected line (e.g., CAN_H or RS-485 A); conducts equally in both directions during overvoltage |
| Terminal 2 | Bidirectional surge port | Connects to reference plane (e.g., ground or complementary line); completes symmetrical clamping path |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term reliability and stable VBR under thermal cycling and humidity exposure (J-STD-020 MSL Level 1) |
| Bidirectional configuration (CA suffix) | Eliminates polarity concerns in AC-coupled or differential interfaces like CAN, RS-485, and USB D+/D− |
| ISO 7637-2 compliance | Validated for automotive load-dump (Pulse 2b), supply interruption (Pulse 3a/3b), and inductive switching (Pulse 1) |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU - suitable for green manufacturing and export compliance |
| Fast response & low clamping | Sub-1 ps turn-on and 53.9 V clamping at 29 A enable protection of 3.3 V microcontrollers and 12 V sensor front-ends |
Applications
| Automotive Body Control Module (BCM) | Industrial RS-485 Communication Port |
|---|---|
Use Scenario: Protecting LIN/CAN bus lines from load dump and ESD in door module ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between bus line and chassis ground to shunt transients before reaching transceiver IC. Use Value: Maintains signal integrity during 12 V system surges up to 1500 W while adding zero propagation delay or capacitance penalty. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., MAX13487) against field-induced surges in factory automation networks. IC Role / Device Role / Timing Role: Symmetrical line-to-line and line-to-ground clamping on A/B differential pair to prevent latch-up or burnout. Use Value: Enables >25 kV ESD immunity (IEC 61000-4-2) and 1 kV/1 Ω surge survivability (IEC 61000-4-5) without compromising data rate. |
| Telecom DSL Line Interface | Smart Meter Power Supply Input |
Use Scenario: Front-end protection of ADSL/VDSL line drivers against lightning-induced surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: Primary surge arrestor placed before transformer coupling and line driver amplifier. Use Value: Withstands repeated 10/1000 µs surges up to 1500 W while maintaining <1 µA leakage to avoid affecting line impedance matching. |
Use Scenario: Input-stage overvoltage protection for 220 VAC-derived 12 V DC supplies in utility smart meters. IC Role / Device Role / Timing Role: Secondary clamp after MOV and fuse, providing precise low-voltage clamping for downstream DC-DC converters. Use Value: Limits input rail overshoot to ≤53.9 V during fast transients, preventing damage to 15 V-rated buck controller ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA (Bourns) | Lower PPK (600 W), same DO-214AA (SMB) package, VWM = 30.8 V, VC = 58.1 V @ 10.3 A | Less robust for ISO 7637-2 Pulse 1; suited for lower-energy consumer electronics, not automotive primary protection | Select when board space is constrained and surge energy is limited to ≤600 W |
| SMCJ36CA (Littelfuse) | Same PPK (1500 W), DO-214AB (SMC) package, VWM = 30.8 V, VC = 58.1 V @ 25.4 A, higher IR (5 µA @ 30.8 V) | Compatible footprint but higher clamping voltage reduces margin for 3.3 V logic; wider VBR tolerance (±10%) | Acceptable where 58.1 V clamping is acceptable and higher leakage is tolerable |
Compared with SMBJ36CA and SMCJ36CA, the 1.5SMC39CA offers tighter VBR tolerance (±5%), lower clamping voltage (53.9 V vs. ≥58.1 V), and guaranteed <1 µA leakage - making it preferable for high-reliability automotive and industrial designs requiring precise voltage limiting and minimal standby current.
Availability
1.5SMC39CA is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and telecom base station power supplies requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for 1.5SMC39CA 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, rectifiers, and MOSFETs - headquartered in Hsinchu Science Park, Taiwan.
The 1.5SMCxxCA series belongs to TSC's high-power surface-mount TVS platform, engineered specifically for automotive-grade transient immunity (ISO 7637-2) and industrial surge resilience (IEC 61000-4-5) in compact SMC packages.
FAQ
What does the 'CA' suffix indicate in 1.5SMC39CA?
The 'CA' suffix denotes a bidirectional configuration with symmetrical clamping in both polarities - essential for protecting AC-coupled or differential signal lines like CAN, RS-485, or Ethernet PHYs. Unlike unidirectional variants (e.g., 1.5SMC39A), the 1.5SMC39CA has no cathode marking and functions identically regardless of terminal orientation.
Is 1.5SMC39CA compatible with automated SMT assembly processes?
Yes, the 1.5SMC39CA uses a DO-214AB (SMC) package with matte tin-plated leads compliant with J-STD-002 solderability standards and moisture sensitivity level (MSL) 1 - enabling direct placement via pick-and-place machines without baking or special handling prior to reflow.
How does 1.5SMC39CA perform under repeated surge stress?
The 1.5SMC39CA is rated for non-repetitive 10/1000 µs surges per Fig.5; its 1500 W PPK rating assumes single-event derating above 25°C (per Fig.2). For repetitive surges, thermal design must ensure TJ remains ≤150°C using RθJA = 50 °C/W - typically requiring PCB copper area or airflow for >1 Hz event rates.
Can 1.5SMC39CA replace 1.5SMC36CA in an existing design?
Direct substitution requires validation: 1.5SMC39CA has higher VWM (33.3 V vs. 30.8 V) and lower VC (53.9 V vs. 49.9 V), offering improved overvoltage margin but slightly reduced sensitivity to low-level transients. Check system VCC tolerance and transient threshold requirements before replacement.
Does 1.5SMC39CA meet automotive qualification standards?
While not AEC-Q200 certified as a standalone part, the 1.5SMC39CA meets ISO 7637-2 Pulse 1/2a/2b/3a/3b test requirements and operates from -55°C to +150°C - widely adopted in automotive BCM, infotainment, and ADAS subsystems where full AEC-Q200 is not mandated for discrete TVS components.
1.5SMC39CA 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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 29A
- 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)
1.5SMC39CA FAQ
1.How can I place an order for 1.5SMC39CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39CA 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 1.5SMC39CA reliable?
The price and inventory of 1.5SMC39CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39CA is usually 5 days.
3.What payment methods are accepted for 1.5SMC39CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39CA?
1.5SMC39CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39CA 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 1.5SMC39CA?
For technical support, including 1.5SMC39CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39CA requirements.
6.How does Aetrix verify that 1.5SMC39CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39CA 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 1.5SMC39CA meets industry standards.
7.What is the process for return or replacement of 1.5SMC39CA?
All 1.5SMC39CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39CA, 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 1.5SMC39CA part is unused and in its original packaging.
Return procedure for 1.5SMC39CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC39CA Tags
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