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Vishay General Semiconductor - Diodes Division 1.5SMC30CAHM3/H
- Part No.:
- 1.5SMC30CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30CAHM3/H.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,960
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Product details
Overview
1.5SMC30CAHM3/H 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, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC30CAHM3/H datasheet, 1.5SMC30CAHM3/H pinout, 1.5SMC30CAHM3/H application, or 1.5SMC30CAHM3/H equivalent, this device delivers AEC-Q101 qualification, halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and verified clamping performance under repetitive surge conditions - critical for ESD and lightning transient immunity in harsh-environment electronics.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling single-device protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±5 %), low leakage (<1 µA at 25.6 V), and fast sub-nanosecond response to transients.
The device uses the SMC (DO-214AB) package with matte tin-plated leads solderable per J-STD-002, delivering 75 °C/W junction-to-ambient thermal resistance and rated for continuous operation from −65 °C to +150 °C. It meets UL 94 V-0 flammability and supports automated placement in high-volume manufacturing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 25.6 V - Maximum continuous reverse voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown, min) | 33.3 V at 1 mA - Confirmed avalanche initiation voltage; ensures reliable triggering above normal operating voltage. |
| VC (Clamping, max) | 41.4 V at 36.2 A - Peak voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream ICs and MOSFETs. |
| PPPM | 1500 W - Sustains 10/1000 µs surges up to 36.2 A without failure; suitable for IEC 61000-4-5 Level 4 compliance designs. |
| IPPM | 36.2 A - Peak pulse current corresponding to VC; determines minimum trace width and PCB copper area required for thermal management. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial control cabinet environments. |
| MSL Level | Level 1 (per J-STD-020) - No floor life limitation; can be stored indefinitely before reflow without baking. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction in CA devices. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line pair (e.g., RS-485 A/B). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for engine control, ADAS sensor modules. |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-20 and EU RoHS Directive 2011/65/EU; eliminates brominated flame retardants in molding compound. |
| 1500 W peak pulse power | Withstands repeated 10/1000 µs transients up to 36.2 A - exceeds IEC 61000-4-5 open-circuit test requirements for industrial equipment. |
| Low clamping ratio (VC/VBR = 1.24) | Minimizes overvoltage overshoot during surge events - preserves margin for 3.3 V or 5 V logic-level interface components. |
| MSL Level 1 handling | Eliminates pre-reflow baking steps and floor-life tracking - reduces manufacturing overhead in high-mix SMT lines. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching signal conditioning ICs. Use Value: Maintains signal integrity under ±300 V/50 ms load dump transients while preserving <1 µA leakage at 25.6 V system rail. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to ground potential differences and EFT bursts. IC Role / Device Role / Timing Role: Differential-line TVS mounted across A/B data lines to clamp common-mode surges without disrupting DC bias or signal swing. Use Value: Limits clamped voltage to 41.4 V during 36.2 A transients - well below RS-485 receiver absolute maximum rating (±12 V) when combined with proper common-mode choke. |
| Consumer Power Adapter Input | Telecom DSL Line Protection |
|
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters subjected to lightning-induced surges on DC output rails. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed between +VOUT and GND to absorb 1500 W transients without latch-up or thermal runaway. Use Value: Enables compact design with 0.211 g weight and DO-214AB footprint - avoids need for bulkier PPTC + MOV hybrid solutions. |
Use Scenario: Primary protection for ADSL/VDSL line drivers against induced surges from nearby power lines or lightning coupling. IC Role / Device Role / Timing Role: Bidirectional suppressor installed between tip/ring and ground in line card front-end, upstream of transformer and codec IC. Use Value: Provides 33.3–37.1 V VBR range matching telecom line voltage tolerances while maintaining <1 µA leakage at 25.6 V standby. |
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 peak power (600 W), smaller SMB package (DO-214AA), higher RθJA (110 °C/W) | Restricted to lower-energy transients (e.g., ESD-only); unsuitable for IEC 61000-4-5 Level 3+ or automotive load dump. | Select only when board space is constrained and surge threat level is limited to human-body-model (HBM) or contact discharge. |
| 1.5KE30CA | Through-hole TO-218 package, same 30 V VWM, but slower response due to higher parasitic inductance (~1.5 nH vs. <0.5 nH for SMC) | Not suitable for high-speed data lines; requires manual insertion or wave soldering - incompatible with fully automated SMT lines. | Choose only for legacy through-hole designs or where mechanical robustness outweighs layout density and assembly efficiency. |
Compared with SMBJ30CA and 1.5KE30CA, the 1.5SMC30CAHM3/H delivers superior surge handling in a surface-mount format with automotive qualification, making it the preferred choice for new designs targeting AEC-Q101 compliance, high-volume SMT production, and IEC 61000-4-5 immunity.
Availability
1.5SMC30CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial communication interfaces, consumer power supplies, and telecom line cards requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC30CAHM3/H 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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in automotive, industrial, and telecom systems - prioritizing AEC-Q101 qualification, low clamping ratio, and MSL Level 1 manufacturability.
FAQ
What is the clamping voltage of the 1.5SMC30CAHM3/H under a 10/1000 µs surge?
The 1.5SMC30CAHM3/H has a maximum clamping voltage (VC) of 41.4 V at 36.2 A peak pulse current with a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC30CAHM3/H maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC30CAHM3/H suitable for automotive applications?
Yes, the 1.5SMC30CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability validation. It is explicitly rated for use in engine control units, ADAS sensors, and body electronics where exposure to load dump, jump start, and ISO 7637-2 transients is expected. The 1.5SMC30CAHM3/H meets all required stress tests including temperature cycling and high-temperature reverse bias.
What does the "CA" suffix mean in 1.5SMC30CAHM3/H?
The "CA" suffix in 1.5SMC30CAHM3/H denotes a bidirectional Transient Voltage Suppressor - meaning it provides symmetrical clamping for both positive and negative transients without polarity dependence. Unlike unidirectional "A" variants, the CA version has no cathode band marking and functions identically regardless of voltage polarity applied across its terminals. This makes the 1.5SMC30CAHM3/H ideal for protecting AC-coupled or differential signal lines such as RS-485 or CAN FD buses.
What is the standoff voltage (VWM) of the 1.5SMC30CAHM3/H?
The standoff voltage (VWM) of the 1.5SMC30CAHM3/H is 25.6 V - the maximum DC or continuous peak voltage that can be applied without causing significant leakage current (>1 µA). This parameter establishes the design margin between normal operating voltage and the onset of avalanche conduction. For example, the 1.5SMC30CAHM3/H is appropriate for protecting 24 V nominal systems where transient spikes must be clamped before exceeding downstream IC absolute maximum ratings.
Does the 1.5SMC30CAHM3/H require special PCB layout considerations?
Yes - to achieve rated 1500 W pulse power, the 1.5SMC30CAHM3/H must be mounted on minimum recommended copper pad areas: 0.31" × 0.31" (8.0 mm × 8.0 mm) per terminal, per Vishay specification. Smaller pads increase thermal impedance and reduce surge current handling. Additionally, short, wide traces to ground or return paths minimize inductive voltage overshoot during fast transients. The 1.5SMC30CAHM3/H benefits from symmetric routing when used on differential lines to preserve common-mode rejection.
1.5SMC30CAHM3/H 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:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC30CAHM3/H FAQ
1.How can I place an order for 1.5SMC30CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30CAHM3/H 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 1.5SMC30CAHM3/H reliable?
The price and inventory of 1.5SMC30CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC30CAHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC30CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30CAHM3/H?
1.5SMC30CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30CAHM3/H 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 1.5SMC30CAHM3/H?
For technical support, including 1.5SMC30CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30CAHM3/H requirements.
6.How does Aetrix verify that 1.5SMC30CAHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30CAHM3/H 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 1.5SMC30CAHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC30CAHM3/H?
All 1.5SMC30CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30CAHM3/H, 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 1.5SMC30CAHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC30CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC30CAHM3/H Tags
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