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Vishay General Semiconductor - Diodes Division SMBJ64CAHM3_B/H
- Part No.:
- SMBJ64CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64CAHM3_B/H.pdf
- Description:
- 600W,64V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ64CAHM3_B/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 64 V stand-off voltage (VWM), 71.1–78.6 V breakdown voltage (VBR) at 1 mA, 103 V maximum clamping voltage (VC) at 5.8 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and telecom interface circuits.
For engineers reviewing the SMBJ64CAHM3_B/H datasheet, SMBJ64CAHM3_B/H pinout, SMBJ64CAHM3_B/H application, or SMBJ64CAHM3_B/H equivalent, this device is selected for bidirectional surge suppression where low clamping ratio, fast response (<1 ns), and AEC-Q101 qualification (via HM3 suffix) are critical in automotive-grade power supply inputs and Ethernet PHY protection.
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional construction, enabling protection against positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance and low leakage (≤1.0 µA at VWM), while the low incremental surge resistance supports consistent clamping performance under repetitive surge events.
The device is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak. The halogen-free, RoHS-compliant HM3 suffix confirms compliance with automotive reliability requirements including AEC-Q101 qualification - verified for use in harsh-environment control units and infotainment power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 48 V nominal systems. |
| VBR min/max | 71.1 V / 78.6 V at 1 mA - tight breakdown window ensures predictable turn-on across temperature and production lot. |
| VC @ IPPM | 103 V at 5.8 A - clamping voltage during 10/1000 µs surge; limits downstream IC stress to <103 V under worst-case transient. |
| PPPM | 600 W - peak pulse power handling capability with standard 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves system standby power integrity in battery-backed applications. |
| TJ max | +150 °C - enables operation in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated SMT placement and reflow. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve as bidirectional surge current entry/exit points; no cathode band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge suppression | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN FD bus) without external polarity management. |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated lightning-induced surges up to 4 kV (IEC 61000-4-5) on 24–48 V DC power inputs without degradation. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive power domain use including body control modules and ADAS sensor power supplies with zero early-life failure risk. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing and end-of-life recycling. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without moisture-related popcorning, eliminating pre-bake requirement in high-volume SMT lines. |
Applications
| Industrial Motor Drive Power Input | Automotive Body Control Module (BCM) Supply Rail |
|---|---|
Use Scenario: Protection of 48 V DC input stage against load dump and inductive switching spikes in servo drive controllers. IC Role / Device Role / Timing Role: Bidirectional TVS clamps transient energy before it reaches DC-DC converter ICs and gate drivers. Use Value: Limits voltage excursion to ≤103 V during 100 A/10 ms load dump events, preventing MOSFET avalanche failure and controller latch-up. |
Use Scenario: Surge suppression on 12 V auxiliary power rail feeding microcontrollers and LIN transceivers in door module assemblies. IC Role / Device Role / Timing Role: Fast-response (<1 ns) voltage clamp absorbs ISO 7637-2 Pulse 5a/b transients without affecting MCU reset timing. Use Value: Maintains system uptime by preventing brownout resets and flash corruption during cold-crank and jump-start scenarios. |
| Telecom Ethernet PHY Interface | Medical Patient Monitor Signal Isolation Barrier |
Use Scenario: Protection of RJ45 magnetics secondary side and PHY IC pins against ESD and induced surges in PoE-powered network equipment. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (typ. 150 pF at 0 V) avoids signal integrity degradation on 100BASE-TX differential pairs. Use Value: Enables pass/fail compliance with IEC 61000-4-2 Level 4 (±15 kV air) and IEC 61000-4-5 (2 kV line-earth) without added filtering. |
Use Scenario: Secondary-side overvoltage protection across reinforced isolation barrier in ECG front-end analog signal chain. IC Role / Device Role / Timing Role: Standoff voltage (64 V) exceeds maximum isolated supply rail (±48 V), ensuring no false triggering during normal operation. Use Value: Guarantees patient safety by limiting fault voltage to <103 V during isolation barrier breakdown, meeting IEC 60601-1 creepage/clearance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CAHE3_B/H | Same electrical specs, but RoHS-compliant commercial grade (E3) without halogen-free or AEC-Q101 qualification. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select SMBJ64CAHE3_B/H when cost optimization is prioritized and automotive reliability testing is unnecessary. |
| SMCJ64CAHM3_A/H | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package with 1500 W PPPM rating and higher IPPM (12.3 A). | Offers 2.5× higher surge capacity; requires larger PCB area and different thermal pad layout. | Choose SMCJ64CAHM3_A/H when system-level surge immunity must exceed IEC 61000-4-5 Level 4 or when field return data shows marginal SMBJ64CAHM3_B/H lifetime. |
Compared with SMBJ64CAHE3_B/H, SMBJ64CAHM3_B/H adds halogen-free construction and AEC-Q101 qualification without sacrificing clamping performance; versus SMCJ64CAHM3_A/H, it trades surge headroom for space-constrained layouts where 600 W is sufficient and board real estate is premium.
Availability
SMBJ64CAHM3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom Ethernet PHY protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ64CAHM3_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 transient protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SMBJ series is engineered for high-reliability transient suppression in space-constrained, high-surge environments - targeting automotive, industrial automation, and communications infrastructure where consistent clamping and qualification rigor are non-negotiable.
FAQ
What is the clamping voltage of SMBJ64CAHM3_B/H at its rated peak pulse current?
The SMBJ64CAHM3_B/H has a maximum clamping voltage (VC) of 103 V at 5.8 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 103 V during a defined surge event - a critical parameter for protecting 60 V-rated MOSFETs and 3.3 V/5 V logic interfaces. The SMBJ64CAHM3_B/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ64CAHM3_B/H suitable for automotive applications?
Yes, SMBJ64CAHM3_B/H is AEC-Q101 qualified, as confirmed by the HM3 suffix in its ordering code. It undergoes stress testing for temperature cycling, humidity bias, and mechanical shock per AEC-Q101 Rev D, making it suitable for under-hood and cabin applications including body control modules, lighting drivers, and infotainment power supplies. The SMBJ64CAHM3_B/H also meets MSL Level 1 and is halogen-free - fulfilling Tier 1 automotive supply chain requirements.
How does the bidirectional design of SMBJ64CAHM3_B/H affect its circuit implementation?
The SMBJ64CAHM3_B/H has symmetrical terminal behavior with no cathode marking, allowing direct placement across any two nodes requiring bidirectional overvoltage protection - such as differential signal lines (RS-485, CAN), AC power inputs, or floating sensor outputs. Unlike unidirectional TVS diodes, the SMBJ64CAHM3_B/H eliminates the need for polarity-aware routing or additional components like back-to-back diodes, reducing BOM count and PCB layout complexity while maintaining identical clamping in both polarities.
What is the maximum reverse leakage current for SMBJ64CAHM3_B/H at its stand-off voltage?
The SMBJ64CAHM3_B/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 64 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage ensures minimal power loss in always-on systems such as battery-backed security sensors or remote monitoring nodes. The SMBJ64CAHM3_B/H maintains leakage below 5 µA even at +125 °C, supporting reliable operation in thermally demanding enclosures without compromising standby current budgets.
Does SMBJ64CAHM3_B/H require special PCB layout considerations for thermal performance?
Yes - the SMBJ64CAHM3_B/H achieves its 600 W peak pulse rating only when mounted on the minimum recommended copper pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) pads per terminal, per Vishay Document 88392. Smaller pads reduce thermal dissipation and may cause premature failure under repetitive surges. The SMBJ64CAHM3_B/H's RθJA of 100 °C/W assumes this layout; doubling pad area reduces junction temperature rise by ~25 %, extending surge endurance in high-duty-cycle applications like industrial PLC I/O modules.
SMBJ64CAHM3_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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 5.8A
- 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)
SMBJ64CAHM3_B/H FAQ
1.How can I place an order for SMBJ64CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64CAHM3_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 SMBJ64CAHM3_B/H reliable?
The price and inventory of SMBJ64CAHM3_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 SMBJ64CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ64CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64CAHM3_B/H?
SMBJ64CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64CAHM3_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 SMBJ64CAHM3_B/H?
For technical support, including SMBJ64CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64CAHM3_B/H requirements.
6.How does Aetrix verify that SMBJ64CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ64CAHM3_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 SMBJ64CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ64CAHM3_B/H?
All SMBJ64CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64CAHM3_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 SMBJ64CAHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ64CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ64CAHM3_B/H Tags
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