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Vishay General Semiconductor - Diodes Division TPSMA39AHM3_B/I
- Part No.:
- TPSMA39AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA39AHM3_B/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,251
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Product details
Overview
TPSMA39AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, rated for 39 V breakdown voltage (VBR = 37.1–41.0 V at 1 mA), 53.9 V clamping voltage (VC) at 7.4 A peak pulse current, and 400 W peak pulse power (10/1000 µs). It operates up to +185 °C junction temperature and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the TPSMA39AHM3_B/I datasheet, TPSMA39AHM3_B/I pinout, TPSMA39AHM3_B/I application, or TPSMA39AHM3_B/I equivalent, this page delivers verified electrical parameters, thermal limits, mechanical package data, and automotive-grade reliability context essential for ESD/surge protection design in sensor interfaces and power rails.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with optimized junction passivation for stable clamping under repetitive surge stress. Its unidirectional polarity enables DC-biased line protection, and its 185 °C maximum junction temperature supports operation in high-temperature engine bay or powertrain modules.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. The cathode is marked by a color band on the SMA body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 37.1 V / 39.0 V / 41.0 V at 1 mA - defines precise voltage threshold where avalanche conduction begins under transient stress |
| VWM | 33.3 V - maximum continuous reverse working voltage before leakage exceeds 1 µA, setting safe operating margin below VBR |
| VC @ IPPM | 53.9 V at 7.4 A - clamped voltage during 400 W surge, limiting downstream IC stress to defined safe level |
| PPPM | 400 W (10/1000 µs waveform) - peak transient energy absorption capability without failure |
| TJ max. | +185 °C - enables use in under-hood automotive environments without derating penalties |
| AEC-Q101 | Qualified - confirms reliability validation for automotive electronic systems per stress test requirements |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" x 0.157" footprint and 0.074" height for automated assembly |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, UL 94 V-0 flammability rating, cathode indicated by color band. Dimensions: 5.28 mm × 3.99 mm × 1.88 mm (L × W × H), recommended pad layout per datasheet Figure 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point for unidirectional TVS | Connected to ground or low-voltage reference; completes clamping path when cathode is biased above VBR |
| Cathode | High-side connection point with polarity marking | Connected to protected line (e.g., CAN_H, LIN, sensor supply); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 185 °C junction rating | Enables direct placement in high-temperature zones (e.g., near power converters or engine control units) without thermal derating |
| 400 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/5a transients and IEC 61000-4-5 Level 3 surges on 12 V/24 V automotive buses |
| AEC-Q101 qualification | Validated for automotive applications including powertrain, body control, and ADAS sensor interfaces per stress test protocol |
| MSL Level 1 | Allows single-pass lead-free reflow at 260 °C without moisture-induced damage, simplifying SMT manufacturing |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output sensors (e.g., pressure, temperature) in engine control modules from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and ground to clamp voltage excursions above 33.3 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V ADC front-ends while maintaining signal integrity via low leakage (<1 µA at VWM). | Use Scenario: Safeguarding CAN transceivers (e.g., TCAN1042, SN65HVD230) against ESD and fast transients on differential bus lines. IC Role / Device Role / Timing Role: Bidirectional protection not required; TPSMA39AHM3_B/I used on individual CAN_H/CAN_L lines referenced to chassis ground. Use Value: Clamps transients to ≤53.9 V within nanoseconds, preserving CAN signal eye diagram and meeting ISO 11898-2 EMC immunity targets. |
| Power Supply Rail Clamp | Telecom Line Card Surge Suppression |
Use Scenario: Secondary overvoltage protection on 24 V DC input rails of industrial PLC I/O modules subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across input capacitor to divert surge energy before reaching upstream DC-DC converter. Use Value: Absorbs 400 W pulses without degradation, maintaining system uptime in outdoor or factory-floor deployments. | Use Scenario: Protecting Ethernet PHY interfaces and PoE injectors in telecom base station line cards from induced surges on copper pairs. IC Role / Device Role / Timing Role: Mounted on board-level Ethernet ports to limit common-mode transients to <60 V before reaching magnetics and PHY IC. Use Value: Complies with GR-1089-CORE Level 3 surge requirements while supporting high-speed signal integrity up to 1 Gbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ39AHE3_A/H | Same VBR range (37.1–41.0 V), but SMB (DO-214AA) package - 20 % larger footprint, 1.5× higher thermal mass | Better suited for manual repair or high-power dissipation scenarios where PCB space allows larger outline | Select if thermal cycling robustness or hand-soldering tolerance is prioritized over miniaturization |
| 1.5SMC39A | Same electrical specs but SMC (DO-214AB) package - 30 % larger than SMA, higher PPPM (1500 W), non-AEC-Q101 | Targeted at industrial/commercial equipment where automotive qualification is unnecessary | Choose when higher surge margin is needed and AEC-Q101 compliance is not mandated |
Compared with SMBJ39AHE3_A/H and 1.5SMC39A, TPSMA39AHM3_B/I offers the smallest footprint among 39 V TVS diodes with AEC-Q101 qualification, enabling dense routing in automotive ADAS camera modules and compact industrial controllers without sacrificing reliability.
Availability
TPSMA39AHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface, and telecom line card surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for TPSMA39AHM3_B/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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and optoelectronics, with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The TPSMA39AHM3_B/I belongs to Vishay's PAR® family of transient voltage suppressors, engineered specifically for robust ESD and surge protection in harsh automotive and industrial environments where thermal stability and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the TPSMA39AHM3_B/I at its rated peak pulse current?
The TPSMA39AHM3_B/I has a maximum clamping voltage (VC) of 53.9 V at 7.4 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value ensures protected circuitry remains within safe overvoltage limits during surge events. The clamping performance is validated per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet Document Number 88405, page 2.
Is the TPSMA39AHM3_B/I suitable for automotive applications?
Yes, the TPSMA39AHM3_B/I is AEC-Q101 qualified and rated for operation up to +185 °C junction temperature, making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its halogen-free, RoHS-compliant construction and MSL Level 1 rating further support automotive manufacturing requirements.
What does the "HM3" suffix indicate in TPSMA39AHM3_B/I?
The "HM3" suffix in TPSMA39AHM3_B/I denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. The "B" indicates revision level, and "I" specifies packaging in 13-inch diameter plastic tape and reel with 7500 units per reel - distinct from "H"-coded 7-inch reels with 1800 units.
How does the TPSMA39AHM3_B/I differ from the HE3 version?
The TPSMA39AHM3_B/I differs from the HE3 version in material composition: HM3 is halogen-free and meets stricter environmental standards, while HE3 is RoHS-compliant but not halogen-free. Both are AEC-Q101 qualified and share identical electrical and thermal specifications, including VBR, VC, and PPPM.
What is the maximum reverse leakage current of the TPSMA39AHM3_B/I at its stand-off voltage?
The TPSMA39AHM3_B/I exhibits a maximum reverse leakage current (IR) of 1.0 µA at its stand-off voltage (VWM = 33.3 V) and ambient temperature (TA = 25 °C). At elevated temperature (TJ = 150 °C), leakage increases to 5.0 µA - a value confirmed in the Electrical Characteristics table of Vishay's datasheet 88405.
TPSMA39AHM3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 7.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA39AHM3_B/I FAQ
1.How can I place an order for TPSMA39AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA39AHM3_B/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 TPSMA39AHM3_B/I reliable?
The price and inventory of TPSMA39AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA39AHM3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA39AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA39AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA39AHM3_B/I?
TPSMA39AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA39AHM3_B/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 TPSMA39AHM3_B/I?
For technical support, including TPSMA39AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA39AHM3_B/I requirements.
6.How does Aetrix verify that TPSMA39AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA39AHM3_B/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 TPSMA39AHM3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA39AHM3_B/I?
All TPSMA39AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA39AHM3_B/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 TPSMA39AHM3_B/I part is unused and in its original packaging.
Return procedure for TPSMA39AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA39AHM3_B/I Tags
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