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Vishay General Semiconductor - Diodes Division TPSMA39AHE3_B/I
- Part No.:
- TPSMA39AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA39AHE3_B/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,175
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Product details
Overview
TPSMA39AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) 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 from −65 °C to +185 °C and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the TPSMA39AHE3_B/I datasheet, TPSMA39AHE3_B/I pinout, TPSMA39AHE3_B/I application, or TPSMA39AHE3_B/I equivalent, key selection criteria include unidirectional polarity, 33.3 V stand-off voltage (VWM), low 1.0 µA reverse leakage at VWM, TJ = 185 °C capability, and RoHS-compliant matte tin-plated terminals meeting JESD 201 Class 2 whisker test.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with junction passivation optimized for high-temperature stability. Its clamping behavior is defined by a 10/1000 µs waveform, delivering 53.9 V maximum clamping voltage at 7.4 A IPPM under standardized PCB mounting (0.2" × 0.2" copper pads).
The device exhibits a typical VBR temperature coefficient of +0.091 %/°C and supports repetitive surge duty cycles up to 0.01 %. It meets MSL Level 1 per J-STD-020 with 260 °C reflow peak and is qualified to AEC-Q101 for automotive under-hood and powertrain applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 37.1 / 39.0 / 41.0 V at 1 mA - defines precise voltage threshold where avalanche conduction begins reliably |
| VWM | 33.3 V - maximum continuous reverse operating voltage before significant leakage |
| VC @ IPPM | 53.9 V at 7.4 A - clamped voltage during 400 W transient, limiting downstream IC stress |
| PPPM | 400 W (10/1000 µs) - peak surge energy handling capacity under standard lightning/inductive-switching waveform |
| TJ max. | +185 °C - enables use in high-ambient environments like engine control units without derating |
| Polarity | Unidirectional - protects against positive transients only; cathode marked by band |
| Package | SMA (DO-214AC) - industry-standard SMD outline with 0.208" body length and 0.177" width for automated placement |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference; carries full surge current during clamping |
| Cathode | Protected line connection | Connected to signal/power line being protected; voltage referenced to anode during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR and low leakage over 185 °C operation and long-term reliability |
| 400 W peak pulse power (10/1000 µs) | Withstands automotive load-dump and ISO 7637-2 Pulse 1/2a/5a transients without failure |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive-grade production use including temperature cycling, HTRB, and ESD testing |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without popcorn or delamination risk |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response time) |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs (e.g., body control modules) from ISO 7637-2 load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 33.3 V. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤53.9 V, preventing latch-up or oxide damage. | Use Scenario: Shielding analog sensor outputs (e.g., pressure or temperature sensors) from ESD and switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential or single-ended signal lines, grounded at system reference. Use Value: Maintains signal integrity with <1 µA leakage at 33.3 V while clamping 8 kV contact ESD per IEC 61000-4-2. |
| Consumer USB Port Surge Suppression | Telecom DC Power Input Protection |
Use Scenario: Safeguarding USB VBUS lines in portable docking stations exposed to hot-plug transients and cable-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS connected between VBUS and GND, sized for 5 V nominal but tolerant of 33.3 V standoff. Use Value: Prevents damage to USB controller ICs during 10/1000 µs surges up to 400 W without affecting normal 5 V operation. | Use Scenario: Protecting 48 V DC telecom power inputs (e.g., PoE injectors) against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary TVS stage upstream of DC-DC converters, mounted on heavy copper pads per spec. Use Value: Absorbs 400 W pulses with 53.9 V clamping, reducing stress on secondary protection and enabling smaller downstream components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Same unidirectional SMA footprint but lower VBR (36.0 V min), higher IPPM (10.3 A), same PPPM (400 W) | Clamps at 58.1 V - less effective for 39 V systems; better suited for 36 V nominal rails | Select when protecting 36 V systems requiring tighter VWM/VBR margin |
| TPSMA39AHM3_B/I | Identical electrical specs; halogen-free molding compound and same AEC-Q101 qualification | No functional difference; used where halogen-free compliance is mandated (e.g., EU automotive Tier 1) | Choose for halogen-free requirement; otherwise TPSMA39AHE3_B/I is direct material substitute |
Compared with SMBJ36A and TPSMA39AHM3_B/I, the TPSMA39AHE3_B/I offers optimal VBR alignment for 39 V systems, RoHS compliance without halogen restriction, and verified 185 °C operation-making it preferred for cost-sensitive, high-reliability automotive and industrial designs where exact 39 V clamping is required.
Availability
TPSMA39AHE3_B/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, consumer USB power delivery systems, and telecom DC input protection requiring stable component supply and AEC-Q101 assurance.
Supply support for TPSMA39AHE3_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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS, MOSFETs, and optoelectronics with emphasis on reliability and high-temperature performance.
The TPSMA39AHE3_B/I belongs to Vishay's PAR® family of surface-mount TVS diodes, engineered specifically for robust transient suppression in automotive, industrial, and harsh-environment applications where extended temperature range and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage tolerance for TPSMA39AHE3_B/I?
The TPSMA39AHE3_B/I has a guaranteed breakdown voltage (VBR) range of 37.1 V to 41.0 V at 1 mA test current, per the Vishay datasheet revision 23-Jan-2024. This ±5% tolerance ensures consistent clamping onset across production lots and supports reliable design margining for 39 V systems. The nominal VBR is 39.0 V, and the device is tested per ANSI/IEEE C62.35 standards.
Is TPSMA39AHE3_B/I suitable for automotive applications?
Yes, TPSMA39AHE3_B/I is AEC-Q101 qualified and explicitly designated for automotive use via its HE3 suffix. It supports junction temperatures up to +185 °C, passes MSL Level 1 reflow, and is validated for temperature cycling, HTRB, and ESD per AEC-Q101. The TPSMA39AHE3_B/I is commonly deployed in body control modules, infotainment power supplies, and ADAS sensor interfaces.
What is the clamping voltage of TPSMA39AHE3_B/I at its rated peak pulse current?
The TPSMA39AHE3_B/I clamps to a maximum of 53.9 V at its rated peak pulse current (IPPM) of 7.4 A, measured using the standard 10/1000 µs waveform. This value is guaranteed across temperature and ensures downstream components see no more than 53.9 V during a 400 W transient event, directly supporting IEC 61000-4-5 and ISO 7637-2 compliance.
Does TPSMA39AHE3_B/I have a bidirectional variant?
No, TPSMA39AHE3_B/I is unidirectional only, as confirmed in the Vishay datasheet. The "A" suffix in the base part number (TPSMA39A) denotes unidirectional polarity. Bidirectional variants (e.g., TPSMA39CA) exist in the same family but are distinct orderable parts with different marking codes and electrical behavior-TPSMA39AHE3_B/I must not be substituted with bidirectional types without circuit redesign.
What packaging options are available for TPSMA39AHE3_B/I?
The TPSMA39AHE3_B/I is supplied in 13" diameter plastic tape and reel format, with a base quantity of 7500 pieces per reel. The "I" in the suffix explicitly denotes this 13" reel configuration, while the "B" indicates revision level B. Tape-and-reel packaging complies with EIA-481-D standards and supports high-speed automated SMT placement.
TPSMA39AHE3_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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA39AHE3_B/I FAQ
1.How can I place an order for TPSMA39AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA39AHE3_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 TPSMA39AHE3_B/I reliable?
The price and inventory of TPSMA39AHE3_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 TPSMA39AHE3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA39AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA39AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA39AHE3_B/I?
TPSMA39AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA39AHE3_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 TPSMA39AHE3_B/I?
For technical support, including TPSMA39AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA39AHE3_B/I requirements.
6.How does Aetrix verify that TPSMA39AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA39AHE3_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 TPSMA39AHE3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA39AHE3_B/I?
All TPSMA39AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA39AHE3_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 TPSMA39AHE3_B/I part is unused and in its original packaging.
Return procedure for TPSMA39AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA39AHE3_B/I Tags
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