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Vishay General Semiconductor - Diodes Division SMBJ14CHE3/52
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- Part No.:
- SMBJ14CHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14CHE3/52.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,449
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Product details
Overview
SMBJ14CHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 14 V standoff voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 1 mA, 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines of industrial sensor interfaces.
For engineers reviewing the SMBJ14CHE3/52 datasheet, SMBJ14CHE3/52 pinout, SMBJ14CHE3/52 application, or SMBJ14CHE3/52 equivalent, key selection criteria include clamping performance under 25.9 A surge, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, unidirectional polarity marking, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector: when transient voltage exceeds VWM = 14 V, it avalanches into low-impedance conduction to clamp the line at ≤23.2 V. Its glass-passivated junction enables sub-nanosecond response time and stable leakage (<1.0 µA at VWM), critical for protecting MOSFET gates and microcontroller I/O pins.
The device is rated for repetitive 600 W pulses (10/1000 µs, 0.01% duty cycle), derated above 25 °C per Fig. 2, and supports peak forward surge current (IFSM) up to 100 A (8.3 ms half-sine). Its MSL Level 1 rating and matte tin-plated leads ensure reliability in lead-free reflow processes up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 15.6 V / 17.2 V at IT = 1 mA - Confirmed avalanche onset range; ensures consistent triggering across temperature and unit variation. |
| VC @ IPPM | 23.2 V at 25.9 A - Measured clamping voltage under standardized 10/1000 µs surge; limits stress on downstream ICs during transients. |
| PPPM | 600 W - Peak pulse power handling capability; sustains repeated surges without degradation when mounted per recommended pad layout. |
| IPPM | 25.9 A - Peak pulse current corresponding to VC; directly determines minimum trace width and PCB copper area required for thermal management. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" pads; informs heatsinking requirements for sustained surge duty cycles. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side return path. | Provides reference node for clamping action; must be routed with low-inductance path to minimize overshoot during fast transients. |
| Cathode | Current exit terminal in forward bias; marked by band; connected to protected line (e.g., 12 V rail or signal input). | Defines polarity-sensitive connection - reversal prevents clamping; band orientation must match PCB silkscreen for automated assembly verification. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and surge endurance - suitable for engine control modules and ADAS sensor interfaces. |
| 600 W peak pulse power (10/1000 µs) | Enables protection against ISO 7637-2 Pulse 1, 2a, and 5a transients without derating in most 12 V vehicle architectures. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt events - critical for safeguarding fast-switching MOSFETs and precision analog front-ends. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow without moisture-related popcorning; eliminates pre-bake requirement in high-volume SMT lines. |
| Glass passivated junction | Ensures stable leakage (<1.0 µA at VWM) and long-term parameter stability across 150 °C operating life - essential for sealed industrial enclosures. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs of body control modules (BCM) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed upstream of DC/DC converters and LDOs. Use Value: Clamps transients to ≤23.2 V, preventing damage to 36 V-rated input regulators while maintaining system uptime during ISO 16750-2 tests. |
Use Scenario: Safeguarding RS-485 differential pairs in factory automation PLC I/O modules exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS used in common-mode configuration across A/B lines. Use Value: Limits common-mode surge energy with <1.0 µA leakage at 14 V, preserving signal integrity and avoiding false triggering in 250 kbps communication links. |
| Consumer Device USB Port Protection | MOSFET Gate Driver Protection |
|
Use Scenario: Shielding USB VBUS lines in portable medical monitors from ESD events during cable insertion. IC Role / Device Role / Timing Role: Unidirectional TVS tied between VBUS and GND, with cathode to VBUS. Use Value: Responds in <1 ns to ±15 kV contact ESD (IEC 61000-4-2), clamping to 23.2 V to prevent latch-up in USB power switches. |
Use Scenario: Preventing gate oxide rupture in high-side N-channel MOSFETs driven by microcontrollers in motor drive inverters. IC Role / Device Role / Timing Role: TVS placed between gate and source to absorb Miller-induced voltage spikes during switching transitions. Use Value: Withstands 100 A non-repetitive surge (IFSM), suppressing >60 V ringing without degrading gate threshold voltage over 105 cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14AHE3/52 | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and package. | Not approved for automotive production; acceptable for industrial or consumer prototypes where qualification is not mandated. | Select SMBJ14AHE3/52 only if AEC-Q101 compliance is unnecessary and cost sensitivity outweighs long-term reliability validation. |
| SMBJ14AHM3/52 | Halogen-free, RoHS-compliant variant with same AEC-Q101 qualification; otherwise electrically identical. | Required for EU automotive programs mandating halogen-free materials; no performance trade-off vs. SMBJ14CHE3/52. | Choose SMBJ14AHM3/52 when environmental compliance (e.g., ELV Directive) is contractually binding and material declarations are audited. |
Compared with SMBJ14AHE3/52 and SMBJ14AHM3/52, the SMBJ14CHE3/52 provides the baseline AEC-Q101-qualified, RoHS-compliant version - making it the default choice for Tier 1 automotive designs requiring full qualification traceability without halogen-free constraints.
Availability
SMBJ14CHE3/52 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, consumer USB port safeguarding, and MOSFET gate driver surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMBJ14CHE3/52 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, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated at the board level.
FAQ
What is the clamping voltage of SMBJ14CHE3/52 under maximum rated surge current?
The SMBJ14CHE3/52 has a maximum clamping voltage (VC) of 23.2 V at 25.9 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that downstream components experience no more than 23.2 V during worst-case transient events, provided the device is mounted on the recommended 5.0 mm × 5.0 mm copper pads.
Is SMBJ14CHE3/52 suitable for automotive applications?
Yes, SMBJ14CHE3/52 is AEC-Q101 qualified and explicitly intended for automotive use. Its qualification covers temperature cycling, mechanical shock, humidity resistance, and surge endurance - enabling deployment in engine control units, infotainment power supplies, and ADAS camera modules where reliability under harsh conditions is mandatory.
How does the SMBJ14CHE3/52 differ from the standard SMBJ14A part?
The SMBJ14CHE3/52 adds AEC-Q101 qualification and RoHS compliance to the base SMBJ14A specification. Electrically and physically identical, it differs only in process controls, test screening, and material certifications - making SMBJ14CHE3/52 appropriate for production automotive systems, whereas SMBJ14A is limited to commercial-grade applications.
What is the thermal resistance of SMBJ14CHE3/52, and how does it affect layout?
The SMBJ14CHE3/52 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. To maintain TJ ≤ 150 °C during repetitive surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks - especially critical in enclosed automotive junction boxes.
Does SMBJ14CHE3/52 support automated SMT placement?
Yes, SMBJ14CHE3/52 uses the SMB (DO-214AA) package with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is rated MSL Level 1 for peak reflow temperatures up to 260 °C. Its low-profile geometry and consistent terminal coplanarity enable high-yield, high-speed pick-and-place assembly without tombstoning or solder bridging.
SMBJ14CHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 23.3A
- 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)
SMBJ14CHE3/52 FAQ
1.How can I place an order for SMBJ14CHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14CHE3/52 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 SMBJ14CHE3/52 reliable?
The price and inventory of SMBJ14CHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14CHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ14CHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14CHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14CHE3/52?
SMBJ14CHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14CHE3/52 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 SMBJ14CHE3/52?
For technical support, including SMBJ14CHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14CHE3/52 requirements.
6.How does Aetrix verify that SMBJ14CHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ14CHE3/52 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 SMBJ14CHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ14CHE3/52?
All SMBJ14CHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14CHE3/52, 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 SMBJ14CHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ14CHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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