My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ17CA-M3/5B
;;2.jpg)
- Part No.:
- SMBJ17CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17CA-M3/5B.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,921
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ17CA-M3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤27.6 V at 21.7 A peak surge current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ17CA-M3/5B datasheet, SMBJ17CA-M3/5B pinout, SMBJ17CA-M3/5B application, or SMBJ17CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, 17 V working voltage compatibility with 24 V rail systems, low clamping ratio (VC/VBR ≈ 1.4), and halogen-free RoHS-compliant packaging for high-reliability PCB assembly.
Technical Context
This TVS diode operates symmetrically in both directions, enabling robust protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ps), while the low incremental surge resistance minimizes voltage overshoot during transient events.
The device is rated for repetitive 10/1000 µs surges at 0.01% duty cycle and supports operating junction temperatures from –55 °C to +150 °C. Thermal resistance (RθJA) is 100 °C/W on standard 0.2" × 0.2" copper pads, and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse voltage before clamping begins; compatible with 24 V nominal systems with margin. |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - Confirmed breakdown range ensures reliable triggering above VWM with defined tolerance. |
| VC @ IPPM | ≤27.6 V at 21.7 A - Clamping voltage limits downstream IC stress during 600 W transient events. |
| PPPM | 600 W (10/1000 µs) - Sustains high-energy surges typical of inductive switching or lightning-induced transients. |
| ID @ VWM | ≤1.0 µA - Negligible leakage at working voltage preserves signal integrity and power efficiency. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm max length, optimized for automated placement and thermal relief. |
| Construction | Halogen-free, RoHS-compliant (M3 suffix) - Meets environmental compliance requirements for commercial-grade electronics. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Transient return path (bidirectional) | Connects to protected line; conducts during positive or negative overvoltage excursions relative to reference. |
| Cathode (Terminal 2) | Transient return path (bidirectional) | Electrically identical to Anode; forms symmetrical clamping pair with Terminal 1 for AC or floating applications. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, RS-485 buses, or ungrounded sensor outputs without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surge events (4 kV/2 Ω) on 24 V lines when properly laid out. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure to downstream ICs compared to higher-ratio suppressors. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C without moisture-related popcorning or delamination. |
| Halogen-free construction (M3) | Complies with IPC-1752A material declaration requirements for green electronics manufacturing. |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting analog output (4–20 mA) or digital I/O lines of pressure/temperature sensors exposed to relay coil kickback or ESD. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between signal line and ground, absorbing transients before they reach ADC or microcontroller input. Use Value: Prevents latch-up or permanent damage to precision front-end circuitry while maintaining <1 µA leakage at 17 V operating voltage. |
Use Scenario: Safeguarding RS-485 transceiver pins in building automation networks subject to induced surges from nearby AC wiring. IC Role / Device Role / Timing Role: Differential-line TVS connected across A/B bus lines and/or to ground, suppressing common-mode and differential-mode transients. Use Value: Maintains signal integrity under IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) testing without degrading data rate or introducing jitter. |
| Automotive Body Control Module | Consumer Power Adapter Input |
|
Use Scenario: Input-side transient suppression on 12 V supply rails feeding BCM microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Primary TVS on main power entry point, clamping load-dump spikes and ISO 7637-2 Pulse 5a/b events. Use Value: Withstands 100 A surge (IFSM) and delivers 27.6 V clamping at 21.7 A - critical for meeting OEM-level EMC immunity specs. |
Use Scenario: Secondary-side overvoltage protection on DC output of wall adapters powering USB peripherals or IoT hubs. IC Role / Device Role / Timing Role: Clamp placed after DC-DC converter output to absorb capacitor discharge transients or reverse-polarity misconnection energy. Use Value: Halogen-free (M3) compliance supports global retail certification; low VC prevents brownout of downstream LDOs during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CA-E3/5B | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3). | Preferred for cost-sensitive commercial designs where halogen-free is not mandated. | Select when environmental compliance only requires RoHS, not IPC-1752A halogen restrictions. |
| SMAJ17CA-M3 | Lower PPPM (400 W vs. 600 W); SMA package (smaller footprint, higher RθJA = 140 °C/W). | Suitable for space-constrained layouts with lower surge threat levels (e.g., IEC 61000-4-2 ESD only). | Choose for compact consumer PCBs where full 600 W surge margin is unnecessary and thermal budget allows. |
Compared with SMBJ17CA-E3/5B, the M3 variant adds halogen-free assurance without performance trade-offs; versus SMAJ17CA-M3, SMBJ17CA-M3/5B delivers 50% higher surge power handling and better thermal dissipation in the same functional role.
Availability
SMBJ17CA-M3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and consumer power adapter inputs requiring stable component supply and long-term manufacturability.
Supply support for SMBJ17CA-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 SMBJ series targets board-level transient protection in harsh environments - engineered for high pulse power density, repeatable clamping, and compatibility with automated SMT assembly processes.
FAQ
What is the maximum clamping voltage of SMBJ17CA-M3/5B at its rated peak pulse current?
The SMBJ17CA-M3/5B clamps to a maximum of 27.6 V when subjected to its peak pulse current of 21.7 A (10/1000 µs waveform). This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ17CA-M3/5B maintains this clamping performance across its specified operating temperature range.
Is SMBJ17CA-M3/5B suitable for protecting RS-485 communication lines?
Yes, SMBJ17CA-M3/5B is widely used for RS-485 line protection due to its bidirectional symmetry, 17 V standoff voltage matching typical 24 V bus designs, and 27.6 V clamping level that stays well below the absolute maximum ratings of common transceivers like the MAX13487 or SN65HVD72. The SMBJ17CA-M3/5B can be placed across differential pairs or from each line to ground depending on system grounding strategy.
Does SMBJ17CA-M3/5B meet automotive qualification standards?
No - SMBJ17CA-M3/5B carries the commercial-grade M3 suffix and is not AEC-Q101 qualified. For automotive applications, Vishay offers the HM3 variant (e.g., SMBJ17CAHM3_B/I), which includes AEC-Q101 qualification, extended temperature validation, and enhanced process controls. The SMBJ17CA-M3/5B remains appropriate for industrial and consumer use cases where AEC-Q101 is not required.
How does the M3 suffix differ from E3 in SMBJ17CA-M3/5B?
The M3 suffix indicates halogen-free, RoHS-compliant construction per IPC-1752A, whereas E3 denotes RoHS-compliant but non-halogen-free materials. Both share identical electrical specifications, package dimensions, and thermal performance. The SMBJ17CA-M3/5B is selected when regulatory or customer requirements mandate halogen-free content, especially in EU and Asia-Pacific markets with strict material declarations.
What is the thermal resistance of SMBJ17CA-M3/5B under standard mounting conditions?
The SMBJ17CA-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's recommended layout. This value assumes still air convection and directly impacts safe power derating above 25 °C ambient. The SMBJ17CA-M3/5B's RθJL is 20 °C/W, supporting localized heat transfer to PCB copper planes.
SMBJ17CA-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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- 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)
SMBJ17CA-M3/5B FAQ
1.How can I place an order for SMBJ17CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17CA-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 SMBJ17CA-M3/5B reliable?
The price and inventory of SMBJ17CA-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 SMBJ17CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ17CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17CA-M3/5B?
SMBJ17CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17CA-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 SMBJ17CA-M3/5B?
For technical support, including SMBJ17CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17CA-M3/5B requirements.
6.How does Aetrix verify that SMBJ17CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ17CA-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 SMBJ17CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ17CA-M3/5B?
All SMBJ17CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17CA-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 SMBJ17CA-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ17CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17CA-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 …
