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Vishay General Semiconductor - Diodes Division SMBJ170AHM3_B/H
- Part No.:
- SMBJ170AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170AHM3_B/H.pdf
- Description:
- 600W,170V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,752
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Product details
Overview
SMBJ170AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching transients and lightning-induced surges on power and signal lines. It features a 170 V stand-off voltage (VWM), 189–209 V breakdown voltage (VBR) at 1 mA, 275 V maximum clamping voltage (VC) at 2.2 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMBJ170AHM3_B/H datasheet, SMBJ170AHM3_B/H pinout, SMBJ170AHM3_B/H application, or SMBJ170AHM3_B/H equivalent, this device is selected for robust overvoltage protection in automotive power rails, industrial sensor interfaces, and telecom DC supply inputs where high clamping efficiency, low leakage (<1.0 µA at VWM), and AEC-Q101 qualification are required.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, conducting only in reverse bias above its breakdown threshold to divert surge energy away from protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while the SMB package supports automated placement and meets MSL level 1 per J-STD-020 with 260 °C lead-free reflow capability.
The device is halogen-free and RoHS-compliant (HM3 suffix), qualified to AEC-Q101 for automotive applications, and rated for continuous operation from –55 °C to +150 °C junction temperature. Its thermal resistance (RθJA = 100 °C/W) and low clamping ratio (VC/VBR ≈ 1.45) enable effective transient suppression without excessive power dissipation in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 275 V at 2.2 A - Clamped voltage under 10/1000 µs surge; determines maximum stress imposed on downstream ICs or MOSFETs. |
| PPPM | 600 W - Peak pulse power handling capacity; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V systems. |
| ID @ VWM | <1.0 µA - Reverse leakage current at rated stand-off; ensures negligible standby power loss and no false triggering. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), unidirectional polarity with cathode band marking on one end. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, whisker-tested per JESD 201 Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (low-side reference) | Connected to ground or lower-potential rail; forms return path during clamping event. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); conducts avalanche current when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-event suppression of 4 kV IEC 61000-4-5 surges on 24 V systems without derating. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics requiring zero-failure reliability across temperature cycling and humidity exposure. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC JS709C requirements for environmentally constrained production programs. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during fast transients, protecting 200 V-rated MOSFETs and gate drivers. |
| MSL level 1 (260 °C peak) | Supports standard lead-free reflow profiles without moisture-related popcorn failure or delamination. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: 12 V battery line in engine control unit exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤275 V, preventing damage to 36 V-input buck controllers and maintaining system uptime during cold-cranking events. |
Use Scenario: 4–20 mA current loop interface in PLC analog input module subjected to EFT bursts (IEC 61000-4-4). IC Role / Device Role / Timing Role: Standoff protection on loop supply line upstream of precision op-amp and ADC front-end. Use Value: Sub-µA leakage preserves loop accuracy; 275 V clamping prevents latch-up in instrumentation amplifiers operating at ±15 V rails. |
| Telecom DC Power Input | Motor Drive Gate Driver Protection |
|
Use Scenario: –48 V DC input to telecom base station power supply encountering lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Primary-level unidirectional clamp on negative rail, paired with bidirectional TVS on differential pair. Use Value: Withstands 600 W pulses without degradation; 170 V VWM provides 20 % margin above nominal –48 V, accommodating ripple and brownout conditions. |
Use Scenario: High-side gate drive supply (e.g., 15 V bootstrap rail) in BLDC inverter exposed to Miller-induced voltage spikes. IC Role / Device Role / Timing Role: Clamp between gate driver VDD and GND to suppress dv/dt-induced overshoot during MOSFET switching. Use Value: 2.2 A IPPM rating handles repetitive 100 ns spikes; fast response time (<1 ns) prevents gate oxide breakdown in 650 V SiC MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170AHE3_B/H | Same electrical specs and SMB package, but RoHS-compliant commercial-grade (E3) instead of halogen-free (HM3); no AEC-Q101 qualification. | Approved for non-automotive industrial and consumer use; not suitable for automotive OEM or Tier 1 designs requiring AEC-Q101. | Select SMBJ170AHE3_B/H only when halogen-free content and automotive qualification are not required. |
| SMCJ170A-HM3 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher RθJA (60 °C/W) and 1500 W PPPM rating. | Used where higher surge endurance is needed (e.g., outdoor telecom cabinets), but requires 30 % larger PCB area and different land pattern. | Choose SMCJ170A-HM3 only if 600 W is insufficient and board space allows SMC footprint. |
Compared with SMBJ170AHE3_B/H, the SMBJ170AHM3_B/H adds halogen-free compliance and AEC-Q101 qualification without sacrificing electrical performance; versus SMCJ170A-HM3, it trades surge capacity for compactness and thermal compatibility with dense automotive PCB layouts.
Availability
SMBJ170AHM3_B/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ170AHM3_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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping performance and long-term stability under thermal cycling are critical.
FAQ
What is the maximum clamping voltage of SMBJ170AHM3_B/H under a 10/1000 µs surge?
The SMBJ170AHM3_B/H has a maximum clamping voltage (VC) of 275 V when subjected to its rated peak pulse current of 2.2 A with a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ170AHM3_B/H maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C) without derating up to 25 °C ambient.
Is SMBJ170AHM3_B/H qualified for automotive applications?
Yes, SMBJ170AHM3_B/H is AEC-Q101 qualified, as indicated by the "HM3" suffix in its ordering code. This qualification confirms that the device has passed stress tests including temperature cycling, humidity bias HAST, and mechanical shock, making it suitable for automotive powertrain, chassis, and body electronics. The SMBJ170AHM3_B/H is specifically intended for use in environments where reliability under vibration, thermal extremes, and long service life are mandatory.
What is the reverse leakage current specification for SMBJ170AHM3_B/H at its stand-off voltage?
The SMBJ170AHM3_B/H exhibits a maximum reverse leakage current (ID) of 1.0 µA when biased at its 170 V stand-off voltage (VWM) and tested at 25 °C. This ultra-low leakage ensures minimal power loss in always-on systems and avoids false triggering in high-impedance sensing circuits. The SMBJ170AHM3_B/H maintains leakage below 5 µA even at +125 °C junction temperature, supporting stable operation in thermally demanding applications.
Does SMBJ170AHM3_B/H have halogen-free construction?
Yes, SMBJ170AHM3_B/H uses halogen-free molding compound and matte tin-plated leads, fully compliant with JEDEC JS709C and IEC 61249-2-21 standards. The "HM3" suffix explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. This makes the SMBJ170AHM3_B/H suitable for environmentally regulated markets including EU automotive and industrial equipment subject to strict material declarations.
What package type does SMBJ170AHM3_B/H use, and what are its key mechanical dimensions?
SMBJ170AHM3_B/H is housed in the SMB (DO-214AA) surface-mount package, measuring 4.57 mm × 3.94 mm × 2.20 mm (L × W × H) with a 5.59 mm maximum length and 0.203 mm maximum lead thickness. Its standardized footprint supports automated pick-and-place and reflow soldering per IPC-7351B guidelines. The SMBJ170AHM3_B/H uses a cathode band for polarity identification and meets MSL level 1 per J-STD-020 for lead-free assembly.
SMBJ170AHM3_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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 2.2A
- 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)
SMBJ170AHM3_B/H FAQ
1.How can I place an order for SMBJ170AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170AHM3_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 SMBJ170AHM3_B/H reliable?
The price and inventory of SMBJ170AHM3_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 SMBJ170AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ170AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170AHM3_B/H?
SMBJ170AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170AHM3_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 SMBJ170AHM3_B/H?
For technical support, including SMBJ170AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ170AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ170AHM3_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 SMBJ170AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ170AHM3_B/H?
All SMBJ170AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170AHM3_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 SMBJ170AHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ170AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170AHM3_B/H Tags
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