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Vishay General Semiconductor - Diodes Division SMBJ15CAHM3_B/H
- Part No.:
- SMBJ15CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CAHM3_B/H.pdf
- Description:
- 600W,15V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,777
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Product details
Overview
SMBJ15CAHM3_B/H 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 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 24.6 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ15CAHM3_B/H datasheet, SMBJ15CAHM3_B/H pinout, SMBJ15CAHM3_B/H application, or SMBJ15CAHM3_B/H equivalent, this part is evaluated for ESD/surge protection in bidirectional AC-coupled interfaces, low-leakage (<1.0 µA at VWM), automotive-grade halogen-free compliance (HM3 suffix), and MSL Level 1 reflow compatibility up to 260 °C.
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while the 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad design per Vishay's 0.2" × 0.2" (5.0 mm × 5.0 mm) recommendation.
The device delivers 24.4 V clamping at 24.6 A (10/1000 µs), with breakdown voltage (VBR) specified between 16.7 V (min) and 18.5 V (max) at 1.0 mA test current. Temperature coefficient of VBR is +0.088 %/°C, indicating predictable drift over operating range (–55 °C to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse stand-off voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (min/max) | 16.7 V / 18.5 V at 1.0 mA - guaranteed breakdown window ensuring consistent turn-on across production lots |
| VC @ IPPM | 24.4 V at 24.6 A - clamped voltage seen by protected circuit during 10/1000 µs surge; determines residual stress on downstream components |
| PPPM | 600 W - peak transient power dissipation capability under standardized 10/1000 µs waveform; validates robustness against lightning-induced surges |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage at rated stand-off voltage, critical for high-impedance sensor or battery-backed circuits |
| Package | SMB (DO-214AA) - surface-mount outline with 5.59 mm max length, 4.06 mm max width, and 2.20 mm max height; optimized for automated placement |
| Operating TJ | –55 °C to +150 °C - extended junction temperature range supports under-hood automotive and industrial ambient conditions |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals function as interchangeable anode/cathode pair depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional transient conduction path | Either terminal conducts when voltage exceeds ±VBR; no fixed polarity enables AC line protection without orientation constraints |
| Case (exposed metal slug) | Thermal conduction path | Integral heat-spreading element; requires minimum 0.2" × 0.2" copper pads per terminal for rated PPPM derating |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated surge handling for IEC 61000-4-5 Level 3 (1 kV/2 Ω) and ISO 7637-2 Pulse 1/2b in automotive subsystems |
| Halogen-free, RoHS-compliant (HM3 suffix) | Meets JEDEC J-STD-20 Class 2 whisker resistance and IPC-1752 material declaration requirements for green manufacturing |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without pre-baking; eliminates moisture-related popcorning risk during SMT |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes let-through voltage during surge events, reducing stress on 3.3 V or 5 V logic-level interface components |
| AEC-Q101 qualified option available | HM3 suffix denotes qualification per AEC-Q101 Rev D - validated for automotive powertrain and body electronics applications |
Applications
| Industrial Sensor Interface Protection | Automotive CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: Protecting 4–20 mA current-loop sensors and RS-485 transceivers from inductive switching spikes in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across differential signal pairs or supply rails to limit voltage excursions to <25 V. Use Value: Prevents latch-up or gate oxide damage in analog front-end amplifiers and communication ICs during 100 ns–1 µs fast transients. |
Use Scenario: Shielding CANH/CANL lines in automotive ECUs against load dump and jump-start induced surges per ISO 7637-2. IC Role / Device Role / Timing Role: Symmetric TVS connected between CANH and CANL to clamp common-mode transients without disrupting DC bias. Use Value: Maintains CAN signal integrity by limiting differential voltage swing to ≤24.4 V, preserving bit timing and error detection thresholds. |
| Telecom Line Card Surge Defense | Consumer USB Port ESD Hardening |
|
Use Scenario: Safeguarding Ethernet PHYs and PoE injectors in telecom access equipment exposed to lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Primary-level TVS mounted at board edge, shunting energy before it reaches magnetics or transformer-coupled receivers. Use Value: Absorbs 600 W transient energy within 1000 µs, preventing saturation of isolation transformers and maintaining link stability. |
Use Scenario: Adding secondary-layer ESD protection on USB 2.0 data lines (D+/D−) in portable devices where internal ICs lack sufficient HBM rating. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed adjacent to connector to divert >8 kV contact discharge per IEC 61000-4-2. Use Value: Limits voltage on D+ and D− to <25 V during ESD event, avoiding data corruption or PHY reset without degrading 480 Mbps signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA-E3/52 | RoHS-compliant commercial grade (E3), not halogen-free; same VWM/VC/PPPM specs; MSL Level 1, 260 °C | Lacks halogen-free certification and AEC-Q101 qualification; suitable for non-automotive industrial use | Select when halogen-free content or automotive qualification is not required; lower cost alternative with identical electrical performance |
| SAC15-03 | Unidirectional variant (SAC series); same VWM/VC but asymmetric conduction; higher VF (3.5 V max at 50 A) | Requires correct polarity orientation; unsuitable for AC-coupled or floating differential lines | Choose only for DC-biased unidirectional rails where polarity is fixed and forward conduction must be blocked |
Compared with SMBJ15CAHM3_B/H, the E3 variant offers identical surge protection performance without halogen-free assurance, while SAC15-03 trades bidirectional flexibility for unidirectional blocking - making SMBJ15CAHM3_B/H the optimal choice for AC signal paths requiring polarity-agnostic clamping and automotive compliance.
Availability
SMBJ15CAHM3_B/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive CAN bus nodes, telecom line cards, and consumer USB port hardening requiring stable component supply across multi-year production cycles.
Supply support for SMBJ15CAHM3_B/H 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, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMBJ series was engineered for high-energy transient suppression in space-constrained surface-mount applications, targeting industrial control, automotive electronics, and communications infrastructure where robustness and repeatability are critical.
FAQ
What is the maximum clamping voltage of SMBJ15CAHM3_B/H under standard surge conditions?
The SMBJ15CAHM3_B/H exhibits a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 24.6 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and represents the highest voltage that will appear across the device during a defined transient event - directly determining the protective margin for downstream ICs and interfaces connected to the same rail.
Does SMBJ15CAHM3_B/H require orientation during PCB placement?
No, SMBJ15CAHM3_B/H does not require orientation during PCB placement because it is a bidirectional TVS diode with symmetrical terminals. Unlike unidirectional variants marked with a cathode band, the SMBJ15CAHM3_B/H has no polarity marking and functions identically regardless of which terminal connects to the line or ground - simplifying automated assembly and eliminating risk of reverse installation in AC-coupled or floating signal paths.
Is SMBJ15CAHM3_B/H qualified for automotive applications?
Yes, SMBJ15CAHM3_B/H carries the HM3 suffix, indicating it is halogen-free, RoHS-compliant, and AEC-Q101 qualified per Revision D. This certification validates its suitability for automotive powertrain, chassis, and body electronics applications where extended temperature operation (–55 °C to +150 °C), mechanical shock resistance, and long-term reliability under cyclic stress are mandatory.
How does the thermal resistance of SMBJ15CAHM3_B/H affect PCB layout?
The SMBJ15CAHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, meaning each watt of dissipated surge energy raises the junction temperature by 100 °C above ambient - unless mitigated by proper copper heatsinking. Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated PPPM; smaller pads cause significant derating and potential thermal runaway during repetitive surges.
What is the reverse leakage current specification for SMBJ15CAHM3_B/H at its stand-off voltage?
The SMBJ15CAHM3_B/H specifies a maximum reverse leakage current (ID) of 1.0 µA at its 15 V stand-off voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage ensures minimal loading on high-impedance circuits such as precision sensor bridges or battery-monitoring inputs, preserving measurement accuracy and extending standby battery life in always-on systems.
SMBJ15CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ15CAHM3_B/H FAQ
1.How can I place an order for SMBJ15CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CAHM3_B/H 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 SMBJ15CAHM3_B/H reliable?
The price and inventory of SMBJ15CAHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ15CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CAHM3_B/H?
SMBJ15CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CAHM3_B/H 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 SMBJ15CAHM3_B/H?
For technical support, including SMBJ15CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CAHM3_B/H requirements.
6.How does Aetrix verify that SMBJ15CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ15CAHM3_B/H 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 SMBJ15CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ15CAHM3_B/H?
All SMBJ15CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CAHM3_B/H, 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 SMBJ15CAHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ15CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CAHM3_B/H Tags
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