My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM6T15CAHM3_B/I
- Part No.:
- SM6T15CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T15CAHM3_B/I.pdf
- Description:
- 600W,15V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,177
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM6T15CAHM3_B/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 15 V standoff voltage (VWM), 21.2 V clamping voltage (VC) at 28 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform. It provides robust ESD and surge protection for automotive sensor signal lines, industrial I/O interfaces, and power supply rails.
For engineers reviewing the SM6T15CAHM3_B/I datasheet, SM6T15CAHM3_B/I pinout, SM6T15CAHM3_B/I application, or SM6T15CAHM3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VWM ≈ 1.41), and SMB package compatibility with automated SMT assembly.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical breakdown (VBR min/max = 14.3–15.8 V), clamping (VC = 21.2 V @ IPPM), and leakage (ID ≤ 1.0 μA @ VWM) characteristics in forward and reverse directions. Its glass-passivated junction ensures stable avalanche behavior under repetitive transients.
Designed for high-energy surge suppression, the device sustains 600 W peak pulse power per 10/1000 μs waveform with thermal resistance RθJA = 100 °C/W and maximum junction temperature of 150 °C. It meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - Maximum continuous reverse operating voltage before significant leakage |
| VBR (min/max) | 14.3 V / 15.8 V - Breakdown voltage range at 1.0 mA test current; defines reliable avalanche onset |
| VC @ IPPM | 21.2 V @ 28.0 A - Clamped voltage during 600 W transient; limits downstream IC stress |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 |
| ID @ VWM | ≤ 1.0 μA - Reverse leakage at standoff voltage; ensures minimal standby power loss |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - Standard surface-mount outline with 5.59 mm body length; compatible with IPC-7351B footprint |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD 22-B102 solderability requirements. Bidirectional construction means no polarity marking on the device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode for reverse polarity) | Transient current return path | Both terminals function identically; current flows bidirectionally through symmetrical avalanche junction |
| Anode (Cathode for reverse polarity) | Transient current entry point | No functional distinction between terminals; clamping occurs regardless of voltage polarity applied |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated reliability for automotive applications including engine control, ADAS sensors, and infotainment interfaces |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and supports lead-free reflow profiles up to 260 °C peak |
| 600 W peak pulse power | Withstands 10/1000 μs surges up to 28 A, meeting IEC 61000-4-5 surge immunity requirements |
| Low clamping ratio (VC/VWM = 1.66) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio alternatives |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., temperature, pressure) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient voltage to ≤21.2 V during 10/1000 μs surges. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V sensor interface ICs while maintaining signal integrity during normal operation. | Use Scenario: Shielding digital input modules in programmable logic controllers from induced surges on 24 V DC field wiring exposed to relay switching noise. IC Role / Device Role / Timing Role: Fast-response voltage clamp absorbing up to 600 W transient energy without degradation. Use Value: Eliminates need for external series impedance or RC filtering, reducing BOM count and board space in DIN-rail mounted controllers. |
| Power Supply Rail Clamp | USB/Serial Interface ESD Guard |
Use Scenario: Safeguarding 12 V auxiliary power rails in telecom base stations against lightning-induced surges entering via external connectors. IC Role / Device Role / Timing Role: Low-inductance SMB package enables sub-nanosecond response to fast-rising transients. Use Value: Maintains system uptime by preventing brownouts or resets caused by rail collapse during surge events. | Use Scenario: Adding secondary-level ESD protection on RS-232, RS-485, or USB 2.0 data lines in medical instrumentation where IEC 61000-4-2 ±8 kV contact discharge must be suppressed. IC Role / Device Role / Timing Role: Bidirectional clamping protects differential pairs without affecting common-mode signaling. Use Value: Complements internal IC ESD structures by handling higher energy than on-die diodes alone can absorb. |
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) and VC (24.4 V), but lower PPPM (400 W); SMA package (larger footprint, higher RθJA) | Limited to lower-energy transients; less suitable for IEC 61000-4-5 Level 4 | Choose when cost sensitivity outweighs peak power requirement and PCB area permits larger SMA footprint |
| SMCJ15CA | Higher PPPM (1500 W), same VWM/VC specs, but SMC package (7.11 mm x 6.22 mm vs. SMB's 5.59 mm x 3.94 mm) | Better for high-power industrial surge zones; requires larger pad layout and higher assembly cost | Select when system-level surge testing exceeds 600 W and board space allows SMC footprint |
Compared with SMAJ15CA and SMCJ15CA, the SM6T15CAHM3_B/I delivers optimal balance of 600 W surge capacity, compact SMB size, AEC-Q101 qualification, and halogen-free compliance-making it preferred for space-constrained automotive and industrial designs requiring certified reliability.
Availability
SM6T15CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power supply rails requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified surge protection.
Supply support for SM6T15CAHM3_B/I 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 high-reliability, automotive-grade, and industry-standard solutions.
The SM6T Series is designed specifically for robust transient voltage suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, bidirectional clamping, and standardized SMB packaging are critical.
FAQ
What does the "CA" suffix indicate in SM6T15CAHM3_B/I?
The "CA" suffix in SM6T15CAHM3_B/I denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage clamping in both polarities. This eliminates the need for polarity-aware placement during SMT assembly and enables protection of AC-coupled or floating signal paths. Unlike unidirectional variants (e.g., SM6T15A), the CA version has no cathode band marking and exhibits identical VBR, VC, and ID characteristics in either direction-confirmed in Vishay's SM6T datasheet revision 09-Jan-2024, page 2.
Is SM6T15CAHM3_B/I qualified for automotive applications?
Yes, SM6T15CAHM3_B/I is AEC-Q101 qualified, as indicated by the "HM3" suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified) and explicitly stated in the Vishay SM6T datasheet section "MECHANICAL DATA". It is rated for operation from −65 °C to +150 °C junction temperature and validated for reliability under automotive stress conditions including temperature cycling, humidity bias, and mechanical shock-making it suitable for engine control units, ADAS sensors, and body electronics.
What is the clamping voltage of SM6T15CAHM3_B/I and how is it measured?
The clamping voltage (VC) of SM6T15CAHM3_B/I is 21.2 V, measured at a peak pulse current (IPPM) of 28.0 A using a 10/1000 μs waveform per Figure 1 in the Vishay datasheet. This value represents the maximum voltage that appears across the device during a standardized surge event, directly limiting stress on downstream components. The low VC/VWM ratio of ~1.66 ensures effective protection of 12 V systems without excessive overvoltage margin.
Does SM6T15CAHM3_B/I require a heatsink for standard operation?
No, SM6T15CAHM3_B/I does not require an external heatsink for typical transient suppression duty cycles. Its thermal resistance RθJA is 100 °C/W (typical) and maximum steady-state power dissipation (PD) is 5.0 W at TA = 50 °C. Since TVS diodes conduct only during transient events (microsecond to millisecond duration), junction temperature rise remains within safe limits (<150 °C) when mounted on standard 0.2" × 0.2" copper pads per datasheet note (2). Continuous DC power dissipation is not applicable.
How does the "_B/I" ordering suffix affect SM6T15CAHM3_B/I?
Within the SM6T15CAHM3_B/I part number, "_B" indicates the revision code (document revision B), and "/I" specifies the packaging format: 13-inch diameter plastic tape and reel with 3200 units per reel. This matches Vishay's ordering information table on page 2 of the datasheet, where "/I" corresponds to the preferred delivery mode for high-volume SMT production. The "HM3" portion confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction.
SM6T15CAHM3_B/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T15CAHM3_B/I FAQ
1.How can I place an order for SM6T15CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T15CAHM3_B/I 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 SM6T15CAHM3_B/I reliable?
The price and inventory of SM6T15CAHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T15CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T15CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T15CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T15CAHM3_B/I?
SM6T15CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T15CAHM3_B/I 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 SM6T15CAHM3_B/I?
For technical support, including SM6T15CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T15CAHM3_B/I requirements.
6.How does Aetrix verify that SM6T15CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T15CAHM3_B/I 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 SM6T15CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T15CAHM3_B/I?
All SM6T15CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T15CAHM3_B/I, 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 SM6T15CAHM3_B/I part is unused and in its original packaging.
Return procedure for SM6T15CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T15CAHM3_B/I 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 …
