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Vishay General Semiconductor - Diodes Division SMBJ70CAHM3_A/H
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- Part No.:
- SMBJ70CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70CAHM3_A/H.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,310
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Product details
Overview
SMBJ70CAHM3_A/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 70 V standoff voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 113 V maximum clamping voltage (VC) at 5.3 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used to protect MOSFETs, ICs, and sensor signal lines in industrial power supplies.
For engineers reviewing the SMBJ70CAHM3_A/H datasheet, SMBJ70CAHM3_A/H pinout, SMBJ70CAHM3_A/H application, or SMBJ70CAHM3_A/H equivalent, key selection criteria include bidirectional surge protection capability, low clamping ratio (VC/VBR ≈ 1.45), AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche breakdown in both directions, enabling suppression of 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 fast energy dissipation during ESD or lightning-induced surges.
The SMBJ70CAHM3_A/H is rated for 150 °C maximum junction temperature and exhibits a VBR temperature coefficient of +0.105 %/°C - critical for thermal stability in automotive under-hood environments. Its MSL Level 1 rating (peak reflow 260 °C) and matte tin-plated leads ensure robust manufacturability in high-volume SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 70 V - maximum continuous reverse operating voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 77.8–86.0 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 113 V at IPPM = 5.3 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case transient; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - maximum transient energy absorption capability under standardized 10/1000 µs waveform; enables protection against IEC 61000-4-5 surge events. |
| ID (Reverse Leakage) | <1.0 µA at 70 V - minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max. | 150 °C - supports operation in under-hood automotive and industrial ambient conditions without derating. |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; optimized for automated pick-and-place and thermal pad layout. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Case dimensions: 5.59 mm × 4.06 mm × 2.20 mm (L × W × H); terminals are matte tin-plated for J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during negative transient | One side of symmetrical PN junction; conducts when voltage at this terminal is ~113 V below cathode during surge. |
| Cathode | Current entry terminal during positive transient | Other side of symmetrical PN junction; conducts when voltage at this terminal is ~113 V above anode during surge. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional transient suppression | Enables single-device protection of AC-coupled or floating signal lines without external polarity management. |
| 600 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity requirements for industrial interfaces. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics applications requiring zero defect reliability and extended temperature operation. |
| Halogen-free & RoHS-compliant | Complies with EU Directive 2011/65/EU and IPC-1752A material declarations; suitable for green manufacturing programs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile use (peak 260 °C) without baking preconditioning. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate driver signal lines against inductive kickback from 24 V solenoid switching. IC Role / Device Role / Timing Role: Voltage clamping element placed across gate-source terminals of N-channel MOSFETs. Use Value: Limits transient overshoot to ≤113 V, preventing gate oxide rupture and ensuring >100,000-cycle reliability per JEDEC JESD22-A114. |
Use Scenario: Surge suppression on LIN bus lines exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Bidirectional shunt protector connected between LIN line and ground. Use Value: Clamps ±113 V transients within 1 ns response time, maintaining LIN physical layer integrity per ISO 17987-4. |
| Telecom Power Supply Inputs | Consumer Appliance Sensor Interfaces |
|
Use Scenario: Input-stage protection of 48 V DC-DC converters against lightning-induced surges on PoE-powered equipment. IC Role / Device Role / Timing Role: Primary-level TVS placed between input rail and chassis ground. Use Value: Absorbs 600 W transient energy without degradation, enabling compliance with ITU-T K.20 and Telcordia GR-1089-CORE. |
Use Scenario: ESD safeguard for analog output lines of temperature/humidity sensors in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (≈20 pF) bidirectional clamp on sensor-to-ADC traces. Use Value: Limits ESD stress to <1.0 µA leakage at 70 V, preserving measurement accuracy and avoiding false triggers in 12-bit ADC systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CAHE3_A/H | Same electrical specs, but RoHS-compliant commercial grade (E3) without halogen-free certification. | Lacks halogen-free declaration; not acceptable for automotive OEMs requiring IPC-1752A Class 3 reporting. | Select SMBJ70CAHE3_A/H only for cost-sensitive industrial designs where halogen content is unrestricted. |
| SMAJ70CAHM3_A/H | Lower PPPM (400 W vs. 600 W); same VWM/VBR/VC; SMA package (smaller footprint, higher RθJA). | Insufficient surge margin for IEC 61000-4-5 Level 4; unsuitable for 24 V/48 V industrial power inputs. | Choose SMAJ70CAHM3_A/H only for space-constrained PCBs with lower-energy transients (e.g., USB data lines). |
Compared with SMBJ70CAHE3_A/H and SMAJ70CAHM3_A/H, the SMBJ70CAHM3_A/H uniquely delivers halogen-free compliance plus 600 W surge capacity in the SMB outline - making it the only option satisfying both AEC-Q101 and IEC 61000-4-5 Level 3 requirements in a single device.
Availability
SMBJ70CAHM3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supply inputs, and consumer appliance sensor interfaces requiring stable component supply across multi-year production cycles.
Supply support for SMBJ70CAHM3_A/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, thermal performance, and automotive qualification.
The SMBJ series was developed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure modes must be mitigated without adding complexity or board space.
FAQ
What is the maximum clamping voltage of SMBJ70CAHM3_A/H at its rated peak pulse current?
The SMBJ70CAHM3_A/H has a maximum clamping voltage (VC) of 113 V at 5.3 A peak pulse current (IPPM) under the 10/1000 µs waveform condition. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during a standardized surge event. The SMBJ70CAHM3_A/H maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMBJ70CAHM3_A/H suitable for automotive applications?
Yes, SMBJ70CAHM3_A/H is AEC-Q101 qualified (indicated by the HM3 suffix), meaning it has passed stress tests for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life required for automotive electronic modules. Its 150 °C maximum junction temperature and MSL Level 1 rating further support use in engine control units, body controllers, and infotainment power supplies where SMBJ70CAHM3_A/H provides certified transient protection.
How does the bidirectional design of SMBJ70CAHM3_A/H affect its circuit placement?
The SMBJ70CAHM3_A/H has no polarity marking and functions identically in both directions, allowing placement across any two nodes subject to differential transients - such as LIN bus lines, RS-485 pairs, or AC-coupled sensor outputs. Unlike unidirectional TVS diodes, SMBJ70CAHM3_A/H eliminates orientation errors during automated assembly and avoids the need for dual-device configurations, reducing BOM count and PCB area while maintaining symmetric clamping behavior.
What is the thermal resistance from junction to ambient for SMBJ70CAHM3_A/H?
The SMBJ70CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes still air conditions and directly impacts steady-state power dissipation limits - for example, at 5.0 W continuous power (PD), the junction temperature rise would be 500 °C above ambient, which exceeds its 150 °C rating; thus SMBJ70CAHM3_A/H is intended for transient, not continuous, power handling.
Does SMBJ70CAHM3_A/H meet RoHS and halogen-free requirements?
Yes, the "HM3" suffix in SMBJ70CAHM3_A/H explicitly denotes halogen-free, RoHS-compliant construction per EU Directive 2011/65/EU and IPC-1752A material declarations. The molding compound contains no brominated flame retardants or chlorine-based additives, and the matte tin-plated leads comply with JESD 201 Class 2 whisker resistance. This makes SMBJ70CAHM3_A/H acceptable for green manufacturing programs requiring full substance compliance reporting.
SMBJ70CAHM3_A/H 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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 5.3A
- 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 (SMBJ)
SMBJ70CAHM3_A/H FAQ
1.How can I place an order for SMBJ70CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70CAHM3_A/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 SMBJ70CAHM3_A/H reliable?
The price and inventory of SMBJ70CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ70CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70CAHM3_A/H?
SMBJ70CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70CAHM3_A/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 SMBJ70CAHM3_A/H?
For technical support, including SMBJ70CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70CAHM3_A/H requirements.
6.How does Aetrix verify that SMBJ70CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ70CAHM3_A/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 SMBJ70CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ70CAHM3_A/H?
All SMBJ70CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70CAHM3_A/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 SMBJ70CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ70CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70CAHM3_A/H Tags
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