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Vishay General Semiconductor - Diodes Division 1.5SMC30CA-M3/57T
- Part No.:
- 1.5SMC30CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30CA-M3/57T.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,999
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Product details
Overview
1.5SMC30CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on signal and power lines. It features a 30 V standoff voltage (VWM), 33.3 V minimum breakdown voltage (VBR), 41.4 V maximum clamping voltage (VC) at 36.2 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, sensor interfaces, and automotive ECUs against lightning-induced transients and inductive switching spikes.
For engineers reviewing the 1.5SMC30CA-M3/57T datasheet, 1.5SMC30CA-M3/57T pinout, 1.5SMC30CA-M3/57T application, or 1.5SMC30CA-M3/57T equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, JEDEC-compliant SMC package dimensions, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
The 1.5SMC30CA-M3/57T operates as a bidirectional avalanche diode, symmetrically clamping voltage surges above ±33.3 V (VBR min) in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 μA at 25.6 V), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = 150 °C. Derating begins above TA = 25 °C per Figure 2, and peak pulse current capability drops to 36.2 A under standard 10/1000 μs test conditions with 0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 25.6 V - Maximum continuous reverse voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 33.3–37.5 V at 1.0 mA - Symmetric avalanche threshold in both directions; ensures consistent overvoltage triggering. |
| VC (Clamping Voltage) | 41.4 V at IPPM = 36.2 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capacity for transient suppression; validated per IEC 61000-4-5 Level 4 requirements. |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.0 mm × 8.0 mm copper pad footprint; supports automated placement and high thermal dissipation. |
| Temperature Range | −65 °C to +150 °C - Full operational and storage range; qualified for under-hood automotive environments. |
| Compliance | Halogen-free, RoHS-compliant, MSL Level 1 - Meets IPC/JEDEC standards for moisture sensitivity and environmental safety. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional device with no polarity marking. Cathode/anode terminals are functionally symmetrical; both leads serve as interchangeable surge-current paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge input terminal (bidirectional) | Accepts transient energy in either polarity; connects to line under protection (e.g., CAN_H or RS-485 A). |
| Cathode | Surge input terminal (bidirectional) | Functionally identical to Anode; completes symmetrical clamping path to ground or reference plane. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential lines (e.g., USB D+/D−, CAN bus) without polarity concerns. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 4th-level surges (4 kV line-to-ground, 2 kV line-to-line) without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.24) | Minimizes voltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking; eliminates moisture-related popcorning failures. |
| AEC-Q101 qualification option | HM3 suffix variants (e.g., 1.5SMC30CAHM3_A/H) meet automotive reliability testing for engine control and ADAS modules. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting analog output sensors (e.g., pressure, temperature) in engine bay or chassis modules from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor signal line and chassis ground to clamp transients before reaching ADC input or signal conditioner. Use Value: Maintains signal integrity under 100 V/100 ms load dump events while adding <1 pF capacitance to avoid bandwidth degradation. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLCs exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Connected across A/B differential pair to suppress common-mode surges exceeding ±30 V without disrupting DC bias or data eye. Use Value: Enables robust communication up to 250 kbps in noisy EMI environments while meeting IEC 61000-4-4 EFT immunity requirements. |
| Consumer USB Port Protection | Telecom DSL Line Protection |
|
Use Scenario: Shielding USB 2.0 data lines in set-top boxes and smart displays from ESD (±15 kV contact) and cable discharge events. IC Role / Device Role / Timing Role: Placed inline on D+ and D− traces to divert ESD current away from USB PHY, leveraging sub-nanosecond response time. Use Value: Prevents PHY latch-up and bit errors during hot-plug events while maintaining USB full-speed signal rise/fall times. |
Use Scenario: Guarding ADSL/VDSL line interface circuits in residential gateways against lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Mounted between tip/ring and ground to limit surge voltage to <42 V, preserving xDSL chipset's 5 V supply rail integrity. Use Value: Achieves UL 497B listing for telecom protector applications with <100 ns response and no follow-on current risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Lower PPPM (600 W), same VWM (28.2 V), higher VC (53.3 V at 11.3 A), SMB package (smaller footprint, lower thermal mass) | Preferred for space-constrained consumer PCBs where 600 W surge margin suffices; not suitable for automotive load-dump scenarios. | Select when board area is critical and peak surge energy is ≤600 W; verify thermal derating for ambient >85 °C. |
| 1.5KE33CA | Higher PPPM (1500 W), axial-leaded DO-201AE package, slower thermal response, higher mounting inductance | Used in legacy industrial power supplies and non-SMT designs; incompatible with automated assembly and high-frequency surge suppression. | Choose only for through-hole prototyping or repair; avoid in new SMT designs due to parasitic inductance and reflow incompatibility. |
Compared with 1.5SMC30CA-M3/57T, SMBJ33CA trades surge capacity for compactness, while 1.5KE33CA retains power rating but sacrifices SMT compatibility and high-frequency clamping fidelity - making 1.5SMC30CA-M3/57T the optimal balance of automotive-grade ruggedness, SMT manufacturability, and bidirectional precision.
Availability
1.5SMC30CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, consumer USB ports, and telecom DSL line cards requiring stable component supply with halogen-free, RoHS-compliant sourcing.
Supply support for 1.5SMC30CA-M3/57T 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, repeatable clamping, and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC30CA-M3/57T at its rated peak pulse current?
The 1.5SMC30CA-M3/57T exhibits a maximum clamping voltage (VC) of 41.4 V when subjected to its rated peak pulse current (IPPM) of 36.2 A under the standard 10/1000 μs waveform. This value is measured across both terminals in either polarity and represents the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5SMC30CA-M3/57T suitable for automotive applications?
Yes, the 1.5SMC30CA-M3/57T is halogen-free and RoHS-compliant, and its base series is AEC-Q101 qualified when ordered with HM3 suffix (e.g., 1.5SMC30CAHM3_A/H). While the -M3/57T variant itself is commercial-grade, it shares identical electrical and thermal characteristics with qualified versions and is widely deployed in non-safety-critical automotive modules such as body control units and infotainment interfaces.
How does the bidirectional nature of the 1.5SMC30CA-M3/57T affect its PCB layout?
The 1.5SMC30CA-M3/57T has no polarity marking and functions identically in both directions, simplifying layout for differential or AC-coupled signals. Place it symmetrically across the protected line and ground with matched trace lengths; avoid routing near high-dI/dt paths to minimize inductive coupling. Its SMC package requires 8.0 mm × 8.0 mm copper pads per terminal for optimal thermal performance and surge current handling.
What is the maximum operating temperature for the 1.5SMC30CA-M3/57T?
The 1.5SMC30CA-M3/57T has a maximum junction temperature (TJ max) of +150 °C and an operating junction/storage temperature range of −65 °C to +150 °C. Derating of peak pulse power begins above TA = 25 °C per Figure 2 in the datasheet, and sustained operation above +125 °C requires careful thermal design using the specified RθJA = 75 °C/W and RθJL = 15 °C/W values.
Does the 1.5SMC30CA-M3/57T require a heatsink for standard surge protection use?
No external heatsink is required for the 1.5SMC30CA-M3/57T under typical transient conditions, as its 1500 W peak pulse power is rated with standard 8.0 mm × 8.0 mm copper pads per terminal (per JEDEC JESD51-3). However, for repetitive surge events or elevated ambient temperatures (>85 °C), increasing copper area or adding internal thermal vias improves long-term reliability - the device's RθJL = 15 °C/W enables efficient conduction into the PCB.
1.5SMC30CA-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 36.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC30CA-M3/57T FAQ
1.How can I place an order for 1.5SMC30CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30CA-M3/57T 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 1.5SMC30CA-M3/57T reliable?
The price and inventory of 1.5SMC30CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC30CA-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC30CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30CA-M3/57T?
1.5SMC30CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30CA-M3/57T 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 1.5SMC30CA-M3/57T?
For technical support, including 1.5SMC30CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30CA-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC30CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30CA-M3/57T 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 1.5SMC30CA-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC30CA-M3/57T?
All 1.5SMC30CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30CA-M3/57T, 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 1.5SMC30CA-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC30CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC30CA-M3/57T Tags
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