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Vishay General Semiconductor - Diodes Division SMBJ17CAHE3/5B
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- Part No.:
- SMBJ17CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17CAHE3/5B.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ17CAHE3/5B 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 automotive ECUs for ESD and load-dump protection.
For engineers reviewing the SMBJ17CAHE3/5B datasheet, SMBJ17CAHE3/5B pinout, SMBJ17CAHE3/5B application, or SMBJ17CAHE3/5B equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and bidirectional clamping behavior critical for robust overvoltage design in automotive and industrial systems.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (18.9 V / 20.9 V), ID ≤1.0 µA at VWM = 17 V, and VC = 27.6 V at IPPM = 21.7 A under 10/1000 µs waveform. Its glass-passivated junction ensures stable avalanche performance and low incremental surge resistance.
Designed for automated SMT placement, it meets MSL Level 1 (reflow peak 260 °C), has matte tin-plated leads compliant with J-STD-002, and achieves AEC-Q101 qualification - confirming suitability for automotive-grade transient suppression without polarity marking on the case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR (min/max) | 18.9 V / 20.9 V at IT = 1 mA - guaranteed avalanche onset range; ensures predictable turn-on during transients. |
| VC @ IPPM | 27.6 V at 21.7 A - clamped voltage during 600 W surge; determines protected circuit's maximum stress level. |
| PPPM | 600 W (10/1000 µs) - peak transient energy handling capacity; supports IEC 61000-4-5 Level 4 compliance. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; guides PCB thermal layout. |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), cathode band omitted per bidirectional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | Accepts surge current during positive-going transients; connects to protected line. |
| Anode | Transient current exit (negative polarity) | Serves as return path during negative-going transients; symmetrical conduction with cathode terminal. |
| Cathode | Transient current exit (positive polarity) | Completes clamping path to ground or reference rail during positive surges. |
| Cathode | Transient current entry (negative polarity) | Accepts surge current during negative transients; enables full bidirectional protection. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC characteristics in both directions - eliminates need for polarity-aware layout in AC or floating signal lines. |
| 600 W peak pulse power | Handles IEC 61000-4-5 combined wave (2 Ω/12 Ω) surges up to 4 kV without degradation when mounted per recommended pad layout. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensors requiring long-term reliability. |
| MSL Level 1 rating | Supports single-reflow assembly at 260 °C peak without moisture-induced damage - compatible with standard SMT lines. |
| Glass-passivated junction | Ensures stable leakage (<1 µA at VWM) and repeatable clamping over 1000+ surge events - critical for mission-critical protection. |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Line |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs against load dump and ISO 7637-2 pulses in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between transceiver pins and chassis ground. Use Value: Limits induced transients to ≤27.6 V, preventing latch-up or permanent damage to 5 V tolerant transceivers. |
Use Scenario: Shielding RS-485/CAN FD differential pairs from ESD (IEC 61000-4-2 ±15 kV) and fast transients in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) TVS across differential pair to suppress common-mode surges. Use Value: Maintains signal integrity with sub-10 ns response time while surviving >1000 surges at rated IPPM. |
| Consumer Power Adapter Output | Telecom DC Power Input |
|
Use Scenario: Safeguarding USB-C PD controller ICs from output overvoltage caused by feedback loop failure in AC/DC adapters. IC Role / Device Role / Timing Role: Secondary-side clamping device placed between VBUS and GND after secondary rectifier. Use Value: Clamps fault voltage to 27.6 V within nanoseconds, enabling downstream OVP circuitry to shut down safely. |
Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras) from lightning-induced surges on 48 V DC input rails. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input before DC/DC converter, referenced to system ground. Use Value: Absorbs 600 W surge energy without thermal runaway, preserving upstream fuse and converter reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CA-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure). | Choose SMBJ17CA-M3/5B when halogen-free bill-of-materials is required; otherwise SMBJ17CAHE3/5B offers same performance at commercial-grade cost. |
| SMAJ17CAHE3/A | Lower PPPM (400 W), smaller SMA (DO-214AC) package, RθJA = 140 °C/W, same VWM/VBR/VC. | Not suitable for 600 W surge environments; limited to lower-energy transients or space-constrained consumer designs. | Select SMAJ17CAHE3/A only if board area is critical and surge threat level is ≤400 W; SMBJ17CAHE3/5B provides 50 % higher energy margin. |
Compared with SMBJ17CA-M3/5B, the SMBJ17CAHE3/5B offers identical protection performance with standard RoHS compliance; versus SMAJ17CAHE3/A, it delivers 50 % higher peak pulse power and superior thermal dissipation - making it the preferred choice for automotive and industrial applications demanding robust, validated surge resilience.
Availability
SMBJ17CAHE3/5B is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom DC input hardening requiring stable component supply across multi-year production cycles.
Supply support for SMBJ17CAHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and high-volume manufacturability.
The SMBJ series targets high-energy transient suppression in automotive, industrial, and communications systems - engineered for AEC-Q101 compliance, low clamping voltage, and consistent surge survivability across temperature extremes.
FAQ
What is the standoff voltage (VWM) of SMBJ17CAHE3/5B and how does it relate to system design?
The SMBJ17CAHE3/5B has a VWM of 17 V, meaning it remains non-conductive below this reverse voltage. This value must exceed the maximum normal operating voltage of the protected line - for example, in a 12 V automotive system, 17 V provides 5 V headroom before clamping initiates. Designers use VWM to ensure no leakage or false triggering during nominal operation while maintaining sufficient margin for ripple and tolerance.
Is SMBJ17CAHE3/5B suitable for bidirectional signal lines like RS-485 or CAN?
Yes, SMBJ17CAHE3/5B is explicitly designed for bidirectional applications, as indicated by the "CA" suffix. Its symmetrical VBR (18.9–20.9 V) and VC (27.6 V) in both polarities make it ideal for protecting differential bus lines. When placed across the line-to-line or line-to-ground nodes, it clamps transients regardless of polarity - essential for noise-immune communication interfaces operating in electrically noisy environments.
Does SMBJ17CAHE3/5B require a heatsink for 600 W surge handling?
No external heatsink is required for single-event 600 W surges (10/1000 µs), as energy dissipation is transient and localized. The SMBJ17CAHE3/5B relies on thermal mass of PCB copper pads (0.2" × 0.2" per terminal) and its RθJA of 100 °C/W to limit junction temperature rise. Continuous power dissipation is limited to 5.0 W - so sustained overvoltage conditions require additional circuit protection, not heatsinking.
How does the AEC-Q101 qualification of SMBJ17CAHE3/5B impact automotive deployment?
The AEC-Q101 qualification of SMBJ17CAHE3/5B confirms it has passed accelerated stress tests including temperature cycling, high-temperature reverse bias, and ESD - validating reliability for under-hood and cabin automotive applications. This certification allows direct use in production ECUs without additional qualification, reducing time-to-market and supporting PPAP documentation requirements for Tier 1 suppliers.
What is the maximum clamping voltage (VC) of SMBJ17CAHE3/5B and why does it matter?
The SMBJ17CAHE3/5B clamps to a maximum of 27.6 V at its rated peak surge current of 21.7 A (10/1000 µs). This VC value defines the highest voltage imposed on downstream components during a surge - it must be below the absolute maximum rating of protected ICs (e.g., a 30 V tolerant transceiver). Lower VC improves system robustness, and SMBJ17CAHE3/5B achieves this with low incremental resistance and optimized junction design.
SMBJ17CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ17CAHE3/5B FAQ
1.How can I place an order for SMBJ17CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17CAHE3/5B 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 SMBJ17CAHE3/5B reliable?
The price and inventory of SMBJ17CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ17CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17CAHE3/5B?
SMBJ17CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17CAHE3/5B 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 SMBJ17CAHE3/5B?
For technical support, including SMBJ17CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ17CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ17CAHE3/5B 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 SMBJ17CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ17CAHE3/5B?
All SMBJ17CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17CAHE3/5B, 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 SMBJ17CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ17CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17CAHE3/5B Tags
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