My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ15CA-M3/5B
;;2.jpg)
- Part No.:
- SMBJ15CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CA-M3/5B.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,805
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ15CA-M3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 15 V standoff voltage (VWM), 24.4 V clamping voltage (VC) at 24.6 A peak pulse current, and 600 W peak pulse power dissipation with a 10/1000 µs waveform - deployed in industrial sensor interfaces and automotive body control modules.
For engineers reviewing the SMBJ15CA-M3/5B datasheet, SMBJ15CA-M3/5B pinout, SMBJ15CA-M3/5B application, or SMBJ15CA-M3/5B equivalent, this part is selected for bidirectional surge immunity in low-voltage DC rails, I/O protection against ESD and inductive switching transients, and compliance-critical designs requiring halogen-free, RoHS-compliant packaging.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified between 16.7 V (min) and 18.5 V (max) at 1.0 mA test current. Its clamping behavior ensures voltage limiting under transient stress without latch-up or degradation, supporting repetitive surge events at ≤0.01% duty cycle.
Thermal performance is defined by RθJA = 100 °C/W (junction-to-ambient) and RθJL = 20 °C/W (junction-to-lead), enabling reliable operation up to TJ = +150 °C. The device uses a glass-passivated silicon junction and meets MSL Level 1 per J-STD-020 with 260 °C peak reflow tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V maximum reverse stand-off voltage - defines highest continuous DC or RMS voltage before significant leakage begins |
| VBR (min/max) | 16.7 V / 18.5 V at 1.0 mA - ensures predictable avalanche initiation across production lot |
| VC @ IPPM | 24.4 V at 24.6 A - limits downstream voltage during 10/1000 µs surge, protecting 3.3 V or 5 V logic |
| PPPM | 600 W - sustains high-energy transients such as ISO 7637-2 Pulse 1/2a/5a in automotive environments |
| IPPM | 24.6 A peak pulse current - derived from 10/1000 µs waveform, validated with derating above 25 °C |
| TJ max. | +150 °C - enables use in under-hood or enclosed industrial enclosures without active cooling |
| Package | SMB (DO-214AA) - 0.205" × 0.130" footprint, compatible with standard SMT pick-and-place and reflow profiles |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per datasheet Fig. 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive surges and anode during negative surges - symmetrical conduction |
| Cathode | Transient return path (bidirectional) | Acts as anode during positive surges and cathode during negative surges - no band marking required |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional suppression | Enables single-device protection of AC-coupled or floating differential lines without polarity concerns |
| 600 W peak pulse power | Withstands high-energy transients like lightning-induced surges (IEC 61000-4-5) on 12 V/24 V systems |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance for global industrial and automotive supply chains without brominated flame retardants |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes let-through voltage during clamping, enhancing margin for 3.3 V or 5 V interface ICs |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop) and digital I²C/SPI buses from ESD and relay-switching transients in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point, shunting surge energy to ground before reaching precision ADC or microcontroller GPIO. Use Value: Prevents latch-up or permanent damage to 12-bit DACs and isolated signal conditioners operating at ±15 V supply rails. |
Use Scenario: Safeguarding LIN bus transceivers and window motor driver inputs against load dump and alternator ripple in door module assemblies. IC Role / Device Role / Timing Role: Primary overvoltage limiter on 12 V supply rail and LIN data line, responding within <1 ps to suppress spikes up to 100 V. Use Value: Maintains functional safety integrity per ISO 11898-4 while eliminating need for secondary Zener-based protection networks. |
| Telecom Power Input Stage | Consumer USB-C Port Protection |
|
Use Scenario: Guarding 48 V PoE-powered Ethernet switch ports against induced surges from nearby AC mains cabling or lightning coupling. IC Role / Device Role / Timing Role: First-line TVS on primary DC input, coordinated with upstream fuse and downstream DC-DC converter input filter. Use Value: Limits voltage excursion to <25 V during 10/1000 µs transients, preventing MOSFET gate oxide rupture in hot-swap controllers. |
Use Scenario: Providing dual-direction ESD and surge protection on USB-C CC and VCONN lines in portable docking stations. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) bidirectional clamp mounted adjacent to connector, compliant with IEC 61000-4-2 Level 4 (±15 kV air). Use Value: Enables full-speed USB 2.0 signaling integrity while surviving repeated ±8 kV contact discharge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA-E3/5B | Same electrical specs; RoHS-compliant but contains brominated flame retardants (non-halogen-free) | Acceptable for commercial-grade consumer products where halogen-free requirement is not enforced | Select when cost sensitivity outweighs halogen-free mandate and AEC-Q101 is not required |
| SMBJ15CAHM3_B/I | Identical halogen-free, RoHS-compliant construction; AEC-Q101 qualified; supplied in 13" reel (3200 pcs) | Required for automotive OEM programs needing PPAP documentation and extended temperature validation | Choose for Tier-1 automotive designs requiring qualification evidence and higher-volume tape-and-reel logistics |
Compared with SMBJ15CA-M3/5B, the E3 variant trades halogen-free compliance for lower unit cost in non-automotive settings, while the HM3_B/I adds AEC-Q101 qualification and larger reel packaging - making SMBJ15CA-M3/5B the optimal balance of environmental compliance, industrial reliability, and standard logistics for embedded control systems.
Availability
SMBJ15CA-M3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom power input stages requiring stable component supply, halogen-free compliance, and repeatable surge immunity performance.
Supply support for SMBJ15CA-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, thermal performance, and application-specific validation.
The SMBJ series was engineered for high-power transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and telecom systems where robustness against ISO 7637-2 and IEC 61000-4-5 threats is mandatory.
FAQ
What is the clamping voltage of SMBJ15CA-M3/5B at its rated peak pulse current?
The SMBJ15CA-M3/5B has a maximum clamping voltage (VC) of 24.4 V at 24.6 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry remains below safe operating thresholds during standardized surge events. The SMBJ15CA-M3/5B maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMBJ15CA-M3/5B suitable for automotive applications?
SMBJ15CA-M3/5B is halogen-free and RoHS-compliant but not AEC-Q101 qualified. For non-safety-critical automotive subsystems like infotainment USB ports or cabin lighting controls, it provides robust transient suppression. However, for body control modules or powertrain-related circuits requiring AEC-Q101 validation, the SMBJ15CAHM3_B/I variant should be used instead. The SMBJ15CA-M3/5B itself is widely deployed in industrial-grade automotive aftermarket systems.
How does the bidirectional design of SMBJ15CA-M3/5B affect PCB layout?
The SMBJ15CA-M3/5B has no polarity marking and conducts identically in both directions, simplifying PCB layout by eliminating orientation checks during placement. It requires symmetric 0.2" × 0.2" copper pads per terminal (per datasheet Fig. 2) and benefits from short, low-inductance traces to ground. Unlike unidirectional TVS diodes, the SMBJ15CA-M3/5B avoids risk of reverse-bias failure on AC or floating lines - making it ideal for RS-485, CAN, and LIN bus protection.
What is the thermal resistance of SMBJ15CA-M3/5B, and how does it impact power handling?
SMBJ15CA-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. These values define its ability to dissipate transient energy without exceeding TJ = +150 °C. When mounted on minimum recommended pads, the SMBJ15CA-M3/5B supports full 600 W pulse power only at TA ≤ 25 °C; derating is required per Fig. 2 in the datasheet for elevated ambient temperatures.
Does SMBJ15CA-M3/5B meet any international surge immunity standards?
SMBJ15CA-M3/5B is characterized to withstand waveforms defined in IEC 61000-4-5 (10/1000 µs combination wave) and ISO 7637-2 (Pulse 1, 2a, 3a/b, 5a). Its 600 W peak pulse power rating and 24.4 V clamping voltage enable system-level compliance when integrated with appropriate filtering and grounding. While the SMBJ15CA-M3/5B itself is not certified to a standard, its parameters align with test requirements for Level 3/4 protection in industrial and automotive applications.
SMBJ15CA-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 24.6A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ15CA-M3/5B FAQ
1.How can I place an order for SMBJ15CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CA-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 SMBJ15CA-M3/5B reliable?
The price and inventory of SMBJ15CA-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 SMBJ15CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ15CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CA-M3/5B?
SMBJ15CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CA-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 SMBJ15CA-M3/5B?
For technical support, including SMBJ15CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CA-M3/5B requirements.
6.How does Aetrix verify that SMBJ15CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ15CA-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 SMBJ15CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ15CA-M3/5B?
All SMBJ15CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CA-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 SMBJ15CA-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ15CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CA-M3/5B 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 …
