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Vishay General Semiconductor - Diodes Division SMAJ160AHM3_A/I
- Part No.:
- SMAJ160AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ160AHM3_A/I.pdf
- Description:
- TVS DIODE 160VWM 259VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,589
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Product details
Overview
SMAJ160AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 160 V stand-off voltage (VWM), 178–197 V breakdown voltage (VBR) at 1 mA, 259 V maximum clamping voltage (VC) at 1.2 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), targeting protection of MOSFETs, ICs, and sensor interfaces in industrial and automotive systems.
For engineers reviewing the SMAJ160AHM3_A/I datasheet, SMAJ160AHM3_A/I pinout, SMAJ160AHM3_A/I application, or SMAJ160AHM3_A/I equivalent, this device is selected for high-voltage DC rail protection where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.45), and AEC-Q101 qualification are required - especially in 12 V/24 V/48 V subsystems with inductive load switching or ESD exposure.
Technical Context
This TVS operates as a unidirectional avalanche diode, conducting only in reverse bias above VBR to clamp overvoltage events. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at 160 V), while the SMA package supports automated placement and meets MSL level 1 (260 °C reflow peak).
The device delivers 400 W peak pulse power up to 78 V and 300 W above that threshold, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W. It is halogen-free, RoHS-compliant, and AEC-Q101 qualified - confirmed by ordering suffix HM3 and revision code "A/I" denoting automotive-grade traceability and packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 160 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 178 V / 197 V at 1 mA - guaranteed avalanche initiation window defining robustness margin |
| VC @ IPPM | 259 V at 1.2 A - clamped voltage during 10/1000 μs surge, limiting stress on downstream components |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - surge energy handling capacity per standard waveform |
| ID @ VWM | ≤1.0 μA - ultra-low reverse leakage preserves system efficiency in high-impedance bias networks |
| TJ max | +150 °C - enables operation in under-hood automotive and industrial ambient environments |
| Package | SMA (DO-214AC) - industry-standard 2-pin SMD outline with 5.0 mm × 5.0 mm copper pad thermal design |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, cathode-banded unidirectional configuration. Dimensions: 4.93 mm × 2.92 mm × 2.29 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (non-banded end) | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional protection topology |
| Cathode (banded end) | Avalanche clamping terminal | Connected to protected line (e.g., 160 V rail); conducts reverse surge current to ground when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - supports under-hood and ADAS module deployment |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-20E environmental compliance for green manufacturing |
| 400 W peak pulse power (10/1000 μs) | Withstands repetitive surges up to 0.01% duty cycle without degradation - suitable for motor driver gate drive protection |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during fast transients - critical for safeguarding 200 V-rated MOSFETs |
| MSL Level 1 (260 °C) | Enables single-reflow assembly without moisture sensitivity concerns - eliminates bake-out step in production |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump spikes (up to 120 V) and alternator transients on 24 V battery-fed ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before LDO/regulator stage. Use Value: Limits peak voltage to ≤259 V, preventing damage to 36 V-input PMICs and microcontrollers in body control modules. |
Use Scenario: Protecting analog front-end inputs of pressure/temperature sensors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS shunting transient energy from sensor signal line (e.g., 4–20 mA loop or CAN PHY) to chassis ground. Use Value: Sub-1 ns response time and <1.0 μA leakage preserve signal integrity and measurement accuracy in precision instrumentation. |
| DC-DC Converter Input Stage | MOSFET Gate Driver Protection |
|
Use Scenario: Guarding buck converter input against inductive kickback from upstream relays or solenoids. IC Role / Device Role / Timing Role: Parallel-connected TVS across input bulk capacitor to absorb 400 W pulses without derating. Use Value: Enables use of smaller input capacitors by absorbing surge energy externally - reduces BOM cost and board area. |
Use Scenario: Clamping voltage overshoot on high-side N-channel MOSFET gate during fast switching transitions. IC Role / Device Role / Timing Role: TVS tied between gate and source to clamp Miller-induced spikes exceeding VGS(max) rating. Use Value: Prevents gate oxide breakdown in 200 V-rated MOSFETs by limiting transient gate voltage to ≤259 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ160AHE3_A/I | Same electrical specs; RoHS-compliant but not halogen-free; commercial grade (non-AEC-Q101) | Lacks automotive qualification - unsuitable for safety-critical vehicle subsystems | Select when cost-sensitive industrial designs require identical clamping performance without automotive certification |
| SMBJ160A-HM3_A/I | Same VWM/VBR/VC, but SMB package (DO-214AA); 600 W PPPM rating (vs. 400 W) | Higher surge capability but larger footprint (5.3 mm × 4.6 mm vs. 4.93 mm × 2.92 mm) | Choose when higher pulse energy handling is needed and PCB layout allows larger package |
Compared with SMAJ160AHM3_A/I, the HE3 variant trades halogen-free and AEC-Q101 compliance for lower cost, while the SMBJ160A-HM3_A/I offers +50% surge power in a physically larger package - making SMAJ160AHM3_A/I optimal for space-constrained, automotive-qualified 160 V rail protection.
Availability
SMAJ160AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, DC-DC converter inputs, and MOSFET gate driver circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ160AHM3_A/I 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, automotive qualification, and high-volume manufacturability.
The SMAJ series targets high-voltage transient suppression in space-constrained applications, with design focus on fast clamping, low leakage, and AEC-Q101 compliance for automotive and industrial power systems.
FAQ
What is the maximum clamping voltage of SMAJ160AHM3_A/I at its rated peak pulse current?
The SMAJ160AHM3_A/I has a maximum clamping voltage (VC) of 259 V at 1.2 A peak pulse current (IPPM), measured under the standardized 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring compatibility with downstream 200 V-rated components. The clamping occurs within nanoseconds, preserving system integrity during fast transients.
Is SMAJ160AHM3_A/I qualified for automotive applications?
Yes, SMAJ160AHM3_A/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix (halogen-free, RoHS-compliant, automotive-grade) and revision code "A/I" in the ordering nomenclature. It undergoes stress testing per AEC-Q101 requirements including HTGB, AC/DC life test, and temperature cycling - making it suitable for engine control units, body electronics, and ADAS modules where reliability under harsh conditions is mandatory.
What does the "HM3" suffix indicate in SMAJ160AHM3_A/I?
The "HM3" suffix in SMAJ160AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade "E3" or "M3" versions and confirms compliance with automotive environmental and reliability standards. The "A/I" revision code further specifies tape-and-reel packaging format (7500 pcs per 13″ reel) and process revision level for full traceability in production.
How does SMAJ160AHM3_A/I compare to SMAJ160AHE3_A/I in terms of compliance and use case?
SMAJ160AHM3_A/I and SMAJ160AHE3_A/I share identical electrical parameters (VWM = 160 V, VC = 259 V, PPPM = 400 W), but differ in compliance: HM3 is halogen-free and AEC-Q101 qualified, while HE3 is RoHS-compliant only and intended for commercial use. Therefore, SMAJ160AHM3_A/I is mandated for automotive Tier-1 suppliers, whereas SMAJ160AHE3_A/I suffices for non-automotive industrial applications where halogen content and qualification are not regulated.
What is the thermal resistance from junction to ambient for SMAJ160AHM3_A/I?
The typical thermal resistance from junction to ambient (RθJA) for SMAJ160AHM3_A/I is 120 °C/W, measured on a standard 0.2″ × 0.2″ (5.0 mm × 5.0 mm) copper pad layout per JEDEC standards. This value guides thermal design - for example, at 3.3 W steady-state dissipation, junction temperature rise would be ~396 °C above ambient, confirming the device must operate within its 3.3 W derated power envelope only under pulsed conditions, not continuous DC stress.
SMAJ160AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 160V
- Voltage - Breakdown (Min):
- 178V
- Voltage - Clamping (Max) @ Ipp:
- 259V
- Current - Peak Pulse (10/1000µs):
- 1.2A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
SMAJ160AHM3_A/I FAQ
1.How can I place an order for SMAJ160AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ160AHM3_A/I 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 SMAJ160AHM3_A/I reliable?
The price and inventory of SMAJ160AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ160AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ160AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ160AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ160AHM3_A/I?
SMAJ160AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ160AHM3_A/I 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 SMAJ160AHM3_A/I?
For technical support, including SMAJ160AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ160AHM3_A/I requirements.
6.How does Aetrix verify that SMAJ160AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ160AHM3_A/I 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 SMAJ160AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ160AHM3_A/I?
All SMAJ160AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ160AHM3_A/I, 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 SMAJ160AHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ160AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ160AHM3_A/I Tags
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