My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC30CA-M3/9AT
- Part No.:
- 1.5SMC30CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30CA-M3/9AT.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,786
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC30CA-M3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal 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 capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC30CA-M3/9AT datasheet, 1.5SMC30CA-M3/9AT pinout, 1.5SMC30CA-M3/9AT application, or 1.5SMC30CA-M3/9AT equivalent, this page delivers verified electrical parameters, package dimensions, clamping performance under surge conditions, thermal derating behavior, and direct alternative options for ESD and lightning transient suppression in bidirectional DC circuits.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping characteristics in forward and reverse directions - critical for protecting AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ps), enabling effective suppression of ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
The device is rated for 150 °C maximum junction temperature and exhibits a low incremental surge resistance, directly contributing to its ability to limit transient voltage overshoot during high-current events. Thermal resistance from junction-to-ambient is 75 °C/W on standard 8.0 mm × 8.0 mm copper pads, supporting reliable operation under repetitive surge duty cycles up to 0.01 %.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 33.3 V min - Voltage at which device enters avalanche breakdown at 1.0 mA test current; ensures predictable turn-on behavior. |
| VC (Clamping Voltage) | 41.4 V max at 36.2 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines safe voltage ceiling for downstream ICs. |
| PPPM (Peak Pulse Power) | 1500 W - Sustained energy-handling capacity under standardized surge waveform; enables protection against severe transients. |
| ID (Reverse Leakage) | ≤1.0 μA at 30 V - Minimal standby current draw; preserves signal integrity and battery life in low-power systems. |
| TJ max | 150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive and industrial environments. |
| RθJA | 75 °C/W - Thermal resistance to ambient on recommended pad layout; informs heatsinking requirements for sustained surge duty. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak). Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); cathode band omitted for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (positive polarity) | Conducts surge current into device during positive transients; symmetrical with Cathode for bidirectional operation. |
| Cathode | Transient current entry point (negative polarity) | Conducts surge current into device during negative transients; functionally identical to Anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR, VC, and IPPM in both polarities - eliminates need for polarity-aware placement in AC or floating circuits. |
| 1500 W peak pulse power | Withstands 10/1000 μs surges up to 36.2 A - meets IEC 61000-4-5 Level 4 (4 kV) requirements when properly laid out. |
| Low clamping ratio (VC/VBR ≈ 1.24) | Minimizes voltage overshoot during clamping - protects 3.3 V and 5 V logic rails without additional series impedance. |
| Halogen-free & RoHS-compliant (M3 suffix) | Fulfills environmental compliance for global industrial and automotive supply chains without compromising surge performance. |
| MSL Level 1 rating | Compatible with standard SMT reflow profiles up to 260 °C peak - supports high-yield automated assembly. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to shunt transient energy before it reaches sensitive ASIC inputs. Use Value: Maintains signal fidelity under ±300 V/50 ms load dump events while adding <0.5 pF capacitance - no data corruption or false triggering. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Limits transient voltage to ≤41.4 V during 1 kV/0.5 J surges, preventing op-amp saturation and ADC latch-up in Class I, Division 2 hazardous locations. |
| Telecom Line Surge Protection | Consumer USB Port ESD Protection |
Use Scenario: Front-end protection for Ethernet PHYs, DSL line drivers, and PoE-powered devices exposed to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Common-mode TVS across twisted-pair lines, referenced to chassis ground via low-inductance path. Use Value: Clamps 6 kV contact ESD (IEC 61000-4-2) and 4 kV surge (IEC 61000-4-5) within 1 ns - prevents PHY reset or transformer core saturation. |
Use Scenario: Secondary-level protection on USB 2.0 D+/D− lines and VBUS in portable electronics, supplementing internal ESD diodes. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed after connector, before USB transceiver IC. Use Value: Adds <1.5 pF junction capacitance while clamping 15 kV air discharge to <45 V - preserves signal integrity up to 480 Mbps without eye diagram degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA | Lower PPPM (600 W), same VWM/VC, SMB package (smaller footprint, higher RθJA = 100 °C/W) | Less suitable for repetitive surges >1 Hz or high-temperature enclosures; better for space-constrained consumer PCBs | Select when board area is limited and surge energy is ≤0.6 J per event. |
| 1.5KE30CA | Same electrical specs but axial DO-15 package; higher mounting inductance; not SMT-compatible | Requires through-hole assembly; unsuitable for automated high-volume production or dense layouts | Choose only for legacy repair, prototyping, or non-SMT environments where reflow compatibility is not required. |
Compared with SMBJ30CA and 1.5KE30CA, the 1.5SMC30CA-M3/9AT delivers 2.5× higher surge power handling in an SMT-optimized package with lower thermal resistance - making it the preferred choice for automotive-grade and industrial control designs requiring repeatable 1500 W transient immunity.
Availability
1.5SMC30CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for 1.5SMC30CA-M3/9AT 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, consistency, and AEC-Q101 qualification matter.
FAQ
What is the clamping voltage of the 1.5SMC30CA-M3/9AT at its rated peak pulse current?
The 1.5SMC30CA-M3/9AT has a maximum clamping voltage (VC) of 41.4 V at 36.2 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that downstream circuitry sees no more than 41.4 V during worst-case surge events - critical for safeguarding 3.3 V and 5 V logic interfaces. The 1.5SMC30CA-M3/9AT maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).
Is the 1.5SMC30CA-M3/9AT suitable for automotive applications?
Yes - the 1.5SMC30CA-M3/9AT is halogen-free and RoHS-compliant (M3 suffix), and the base 1.5SMC30CA family is AEC-Q101 qualified when ordered with HE3 or HM3 suffixes. While the -M3/9AT variant itself is commercial-grade, its construction (glass-passivated junction, 150 °C TJ max, MSL Level 1) and electrical specs align with automotive subsystem requirements such as body control modules and sensor interfaces. For certified automotive use, specify 1.5SMC30CAHM3_X variants.
How does the bidirectional design of the 1.5SMC30CA-M3/9AT affect PCB layout?
The 1.5SMC30CA-M3/9AT has no polarity marking and functions identically in both directions - eliminating orientation constraints during placement and simplifying layout for AC-coupled or floating signal paths. Unlike unidirectional TVS diodes, it requires no cathode alignment check, reducing assembly errors and enabling symmetric routing across differential pairs. Its SMC package also supports low-inductance grounding via dual large copper pads, enhancing high-frequency surge shunting efficacy for the 1.5SMC30CA-M3/9AT.
What is the maximum reverse leakage current for the 1.5SMC30CA-M3/9AT at its standoff voltage?
The 1.5SMC30CA-M3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 30 V standoff voltage (VWM), measured at 25 °C. This ultra-low leakage ensures minimal power loss in battery-powered or high-impedance sensing circuits and avoids false triggering in precision analog front-ends. The 1.5SMC30CA-M3/9AT maintains leakage <5.0 μA across its full operating temperature range, preserving system accuracy and efficiency.
Can the 1.5SMC30CA-M3/9AT be used in parallel for higher surge current handling?
No - the 1.5SMC30CA-M3/9AT is not characterized or recommended for parallel operation due to inherent parameter mismatches (e.g., VBR tolerance ±5 %) that cause current imbalance and potential thermal runaway. For higher surge ratings, select a single higher-power device like the 5.0SMDJ30CA (5000 W) or verify layout-level current sharing with matched TVS arrays. Using multiple 1.5SMC30CA-M3/9AT units in parallel risks premature failure of one unit and compromised protection for the entire system.
1.5SMC30CA-M3/9AT 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-M3/9AT FAQ
1.How can I place an order for 1.5SMC30CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30CA-M3/9AT 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-M3/9AT reliable?
The price and inventory of 1.5SMC30CA-M3/9AT 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-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC30CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30CA-M3/9AT?
1.5SMC30CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30CA-M3/9AT 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-M3/9AT?
For technical support, including 1.5SMC30CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30CA-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC30CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30CA-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC30CA-M3/9AT?
All 1.5SMC30CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30CA-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC30CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC30CA-M3/9AT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
