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Vishay General Semiconductor - Diodes Division SM6T15CA-M3/5B
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- Part No.:
- SM6T15CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15CA-M3/5B.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,656
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Product details
Overview
SM6T15CA-M3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 15 V standoff voltage (VWM), 21.2 V max clamping voltage at 28 A peak pulse current, 600 W peak pulse power (10/1000 μs), and operates from −65 °C to +150 °C - used in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the SM6T15CA-M3/5B datasheet, SM6T15CA-M3/5B pinout, SM6T15CA-M3/5B application, or SM6T15CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, SMB footprint compatibility, AEC-Q101 qualification eligibility (via HM3 suffix), and verified 600 W surge handling per JEDEC-standard waveform.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to provide symmetrical clamping in both polarities, enabling robust protection of AC-coupled or floating signal paths without polarity concerns. Its low-inductance SMB package and M3 halogen-free RoHS-compliant construction support automated SMT assembly and meet automotive reliability requirements when ordered with HM3 suffix.
Clamping performance is defined by VC = 21.2 V at IPPM = 28 A (10/1000 μs), with thermal resistance RθJA = 100 °C/W and maximum junction temperature of 150 °C. It delivers stable reverse leakage (<1 μA at VWM) and exhibits no polarity marking - distinguishing it from unidirectional variants like SM6T15A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 14.3 V / 15.8 V at 1 mA - breakdown threshold range defining turn-on consistency |
| VC @ IPPM | 21.2 V at 28 A (10/1000 μs) - clamped voltage limiting stress on downstream ICs |
| PPPM | 600 W - peak surge power handling capacity under standardized lightning/surge waveform |
| TJ max. | +150 °C - enables operation in under-hood automotive or high-ambient industrial environments |
| Package | SMB (DO-214AA) - industry-standard 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix), MSL Level 1, LF peak 260 °C - supports lead-free reflow |
Pinout & Package
SM6T15CA-M3/5B is housed in an SMB (DO-214AA) plastic package with two terminals: no polarity marking indicates bidirectional functionality. The device has no cathode/anode designation; both terminals behave identically under reverse or forward transient conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bidirectional transient port | Connects to protected line (e.g., CAN_H or RS-485 A); identical behavior as Terminal 2 |
| Terminal 2 | Bidirectional transient port | Connects to reference (e.g., ground or differential partner); electrically symmetric to Terminal 1 |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables suppression of IEC 61000-4-5 Level 4 surges (4 kV) on 50 Ω source impedance lines |
| Low clamping voltage (21.2 V @ 28 A) | Protects 12 V rail systems and 3.3 V/5 V logic interfaces without overvoltage damage |
| Halogen-free, RoHS-compliant (M3) | Meets environmental compliance mandates for automotive and industrial OEM supply chains |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free soldering without moisture sensitivity concerns |
| AEC-Q101 qualification path | Available via HM3 suffix variant - validated for automotive-grade reliability and lifetime stress testing |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between sensor signal line and chassis ground. Use Value: Limits transient voltage to ≤21.2 V during 28 A surge events, preserving ADC input integrity and preventing latch-up in microcontroller front-end circuitry. | Use Scenario: Safeguarding differential data lines in factory automation PLCs subject to EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Symmetrical TVS pair (one per line) referenced to common-mode ground, absorbing common-mode surges. Use Value: Maintains signal integrity below RS-485 receiver threshold (±7 V) during 600 W transients, avoiding communication lockup or bus contention. |
| Consumer USB Port ESD | Telecom DSL Line Protection |
Use Scenario: Shielding USB 2.0 D+/D− lines in set-top boxes against ±8 kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp integrated into USB connector PCB layout. Use Value: Clamps ESD events within <1 ns while adding <1 pF parasitic capacitance - no signal rise-time degradation. | Use Scenario: Front-end protection of ADSL/VDSL line drivers in residential gateways exposed to lightning-induced surges on twisted-pair copper. IC Role / Device Role / Timing Role: Primary surge limiter mounted at line entry point, upstream of transformer coupling. Use Value: Absorbs up to 600 W energy from 10/1000 μs surges while holding clamped voltage below 25 V - within line driver absolute maximum rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA | Same VWM (12.8 V), lower PPPM (400 W), SMA package (larger RθJA = 150 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump where 600 W is required | Select SMAJ15CA only if board space allows larger SMA footprint and surge requirements are ≤400 W |
| 1.5KE15CA | Same VWM/VC, higher PPPM (1500 W), axial DO-201 package - not SMT-compatible | Requires through-hole assembly; incompatible with automated SMT lines and dense PCB layouts | Choose 1.5KE15CA only for legacy through-hole designs or prototyping where manual assembly is acceptable |
Compared with SMAJ15CA and 1.5KE15CA, SM6T15CA-M3/5B delivers optimal balance of 600 W surge capability, SMB SMT compatibility, and halogen-free compliance - making it preferred for volume automotive and industrial PCB production where reflow yield and environmental specs are critical.
Availability
SM6T15CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, and consumer USB interface protection requiring stable component supply across multi-year production cycles.
Supply support for SM6T15CA-M3/5B 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 and application-specific optimization.
The SM6T Series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 readiness are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T15CA-M3/5B?
The "CA" suffix denotes a bidirectional configuration: SM6T15CA-M3/5B clamps transients equally in both polarities, unlike unidirectional variants (e.g., SM6T15A). This eliminates polarity concerns during placement and suits AC-coupled or floating signal lines. The device has no cathode band marking, confirming its symmetrical behavior - a key distinction verified in Vishay's SM6T datasheet revision 09-Jan-2024.
Is SM6T15CA-M3/5B qualified to AEC-Q101?
SM6T15CA-M3/5B itself is commercial-grade with halogen-free RoHS compliance (M3 suffix). AEC-Q101 qualification is available under the HM3 suffix variant (e.g., SM6T15CAHM3_B/I). The M3 version shares identical electrical specs and SMB package but lacks the extended reliability testing required for automotive grade - confirmed in Vishay's ordering information table and mechanical data section.
What is the maximum clamping voltage of SM6T15CA-M3/5B and under what test condition?
The maximum clamping voltage of SM6T15CA-M3/5B is 21.2 V, measured at a peak pulse current (IPPM) of 28 A using a 10/1000 μs double-exponential waveform per Figure 1 in the datasheet. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and is validated at TA = 25 °C with specified PCB pad layout (0.2″ × 0.2″ copper).
Can SM6T15CA-M3/5B replace SM6T15A in an existing design?
No - SM6T15CA-M3/5B is bidirectional while SM6T15A is unidirectional, meaning their electrical behavior differs fundamentally under forward-bias conditions. Substituting them without circuit review risks incorrect clamping or forward conduction. The SM6T15CA-M3/5B must be used only where bidirectional protection is explicitly required, as confirmed in Vishay's "DEVICES FOR BIDIRECTION APPLICATIONS" section.
What is the thermal resistance and maximum junction temperature of SM6T15CA-M3/5B?
SM6T15CA-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and a maximum junction temperature (TJ) of +150 °C. These values assume mounting on 0.2″ × 0.2″ copper pads per JEDEC standards. The 150 °C rating enables reliable operation in under-hood automotive or high-temperature industrial enclosures - directly specified in the Thermal Characteristics table of the Vishay SM6T datasheet.
SM6T15CA-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 28A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SM6T15CA-M3/5B FAQ
1.How can I place an order for SM6T15CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15CA-M3/5B 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 SM6T15CA-M3/5B reliable?
The price and inventory of SM6T15CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T15CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SM6T15CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15CA-M3/5B?
SM6T15CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15CA-M3/5B 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 SM6T15CA-M3/5B?
For technical support, including SM6T15CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15CA-M3/5B requirements.
6.How does Aetrix verify that SM6T15CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T15CA-M3/5B 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 SM6T15CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SM6T15CA-M3/5B?
All SM6T15CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15CA-M3/5B, 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 SM6T15CA-M3/5B part is unused and in its original packaging.
Return procedure for SM6T15CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15CA-M3/5B Tags
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