My Inquiry
My Account
Vishay General Semiconductor - Diodes Division TPSMA9.1AHM3_B/I
- Part No.:
- TPSMA9.1AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA9.1AHM3_B/I.pdf
- Description:
- TVS DIODE 7.78VWM 13VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,419
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPSMA9.1AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast voltage transients on power and signal lines. It features 9.1 V breakdown voltage (VBR), 7.78 V stand-off voltage (VWM), 29.9 V clamping voltage at 50 A peak pulse current, 400 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - used in automotive sensor protection and industrial I/O line surge suppression.
For engineers reviewing the TPSMA9.1AHM3_B/I datasheet, TPSMA9.1AHM3_B/I pinout, TPSMA9.1AHM3_B/I application, or TPSMA9.1AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, 1.0 µA max reverse leakage at VWM, and MSL Level 1 moisture sensitivity rating.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with optimized junction passivation for stable clamping under high-temperature stress. Its 10/1000 µs waveform response delivers consistent 400 W peak pulse power dissipation and low incremental surge resistance, enabling reliable protection against inductive switching spikes and lightning-induced surges.
The device is rated for TJ = –65 °C to +185 °C operation, supports 40 A non-repetitive forward surge current (8.3 ms half-sine), and exhibits a positive temperature coefficient of VBR (+0.060 %/°C), ensuring predictable voltage shift across automotive thermal profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 8.65 / 9.10 / 9.55 V - precise breakdown threshold ensures early clamping before downstream IC damage |
| VWM | 7.78 V - maximum continuous reverse voltage without significant leakage, compatible with 5 V–8 V logic/sensor rails |
| VC @ IPPM | 29.9 V - clamping voltage at 50 A pulse defines worst-case overvoltage seen by protected circuitry |
| PPPM | 400 W - peak pulse power handling capability per 10/1000 µs waveform, sufficient for ISO 7637-2 Pulse 1/2a/5a |
| IR @ VWM | 1.0 µA - ultra-low leakage preserves battery life and signal integrity in always-on sensor nodes |
| TJ max. | +185 °C - enables placement near hot components (e.g., power MOSFETs, engine control units) without derating |
| Package | SMA (DO-214AC) - industry-standard SMD outline with 0.208" x 0.157" footprint and matte tin-plated leads |
Pinout & Package
SMA (DO-214AC) package with axial lead configuration: cathode marked by color band; terminals are solderable per J-STD-002 and JESD 22-B102, qualified to MSL Level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VLINE exceeds VBR |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping loop during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock per AEC standard |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC JS709C, eliminating brominated flame retardants in molding compound |
| MSL Level 1 rating | Zero floor life limitation; supports standard reflow without baking, reducing manufacturing overhead |
| 185 °C junction capability | Enables direct mounting on high-power PCB zones (e.g., motor drivers, DC/DC converters) without thermal derating |
| Low clamping ratio (VC/VBR ≈ 3.29) | Minimizes overvoltage overshoot during fast transients, improving margin for 12 V automotive electronics |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in engine control modules. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and chassis ground to shunt transients before reaching sensitive analog front-end or transceiver ICs. Use Value: With 29.9 V clamping at 50 A and 1.0 µA leakage at 7.78 V, TPSMA9.1AHM3_B/I maintains signal fidelity while surviving ISO 16750-2 pulses up to 100 V. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted at connector entry point to absorb repetitive 400 W transients without degradation. Use Value: 400 W peak pulse power and 185 °C operation allow continuous deployment in uncooled control cabinets with ambient temperatures up to 85 °C. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage suppression on 5–12 V DC outputs of wall adapters and USB PD chargers exposed to mains-borne surges. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp limiting output rail excursions during AC line transients or capacitor discharge events. Use Value: 7.78 V VWM ensures no conduction during normal operation; 29.9 V VC prevents latch-up in downstream LDOs or USB interface ICs. | Use Scenario: Protecting Ethernet PHY or RS-485 transceivers on base station backhaul interfaces from lightning-induced common-mode surges on twisted-pair cables. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair lines, coordinated with common-mode chokes to divert surge energy before reaching isolation barriers. Use Value: SMA package allows compact layout near connectors; 0.060 %/°C VBR tempco ensures stable clamping across outdoor operating ranges (–40 °C to +85 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | VBR = 9.0–9.9 V (min/typ/max), VC = 14.4 V @ 27.8 A, PPPM = 400 W, same SMA package | Lower clamping voltage but reduced peak current rating; suited for lower-energy transients | Select SMAJ9.0A where tighter clamping margin is critical and surge currents remain below 28 A |
| 1.5SMC9.0A | VBR = 9.0–9.9 V, VC = 14.4 V @ 27.8 A, PPPM = 1500 W, larger SMC (DO-214AB) package | Higher power rating and thermal mass; requires larger PCB area and different pad layout | Choose 1.5SMC9.0A only when system-level testing confirms >400 W surge exposure and space permits SMC footprint |
Compared with SMAJ9.0A and 1.5SMC9.0A, TPSMA9.1AHM3_B/I offers AEC-Q101 qualification, halogen-free construction, and MSL Level 1 - making it uniquely suitable for automotive and high-reliability industrial designs where process compliance and long-term stability are mandatory.
Availability
TPSMA9.1AHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface circuits requiring stable component supply with full traceability and lifecycle management.
Supply support for TPSMA9.1AHM3_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 devices, and optoelectronics with emphasis on high-reliability and automotive-grade performance.
The TPSMA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor family, engineered specifically for robust, high-temperature-stable clamping in harsh environments such as engine compartments and factory automation systems.
FAQ
What is the breakdown voltage tolerance for TPSMA9.1AHM3_B/I?
The TPSMA9.1AHM3_B/I has a specified breakdown voltage range of 8.65 V (minimum) to 9.55 V (maximum) at 1.0 mA test current, with a typical value of 9.10 V. This ±5.5 % tolerance is verified per ANSI/IEEE C62.35 standards and ensures consistent clamping behavior across production lots and temperature extremes up to +185 °C.
Is TPSMA9.1AHM3_B/I suitable for automotive applications?
Yes, TPSMA9.1AHM3_B/I is AEC-Q101 qualified (HM3 suffix), halogen-free, and rated for TJ = –65 °C to +185 °C - meeting critical requirements for under-hood and body-control module deployments. Its MSL Level 1 rating and 1.0 µA reverse leakage at VWM further support long-term reliability in automotive ECUs using TPSMA9.1AHM3_B/I.
What does the "HM3" suffix indicate in TPSMA9.1AHM3_B/I?
The "HM3" suffix in TPSMA9.1AHM3_B/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from HE3 (RoHS-compliant and AEC-Q101 qualified but not halogen-free) and confirms compliance with JEDEC JS709C and IEC 61249-2-21 standards - essential for automotive Tier 1 supply chain documentation.
How does TPSMA9.1AHM3_B/I compare to TPSMA9.1AHE3_B/I?
TPSMA9.1AHM3_B/I and TPSMA9.1AHE3_B/I share identical electrical specs and SMA packaging, but differ in material content: HM3 is halogen-free and HE3 is RoHS-compliant only. Both are AEC-Q101 qualified and MSL Level 1, but TPSMA9.1AHM3_B/I meets stricter environmental mandates for global OEMs requiring halogen-free BOMs.
What is the maximum clamping voltage of TPSMA9.1AHM3_B/I at rated surge current?
The maximum clamping voltage (VC) of TPSMA9.1AHM3_B/I is 29.9 V at 50 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is guaranteed across the full operating temperature range and forms the basis for overvoltage margin calculations in circuits protected by TPSMA9.1AHM3_B/I.
TPSMA9.1AHM3_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):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13V
- Current - Peak Pulse (10/1000µs):
- 29.9A
- 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)
TPSMA9.1AHM3_B/I FAQ
1.How can I place an order for TPSMA9.1AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA9.1AHM3_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 TPSMA9.1AHM3_B/I reliable?
The price and inventory of TPSMA9.1AHM3_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 TPSMA9.1AHM3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA9.1AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA9.1AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA9.1AHM3_B/I?
TPSMA9.1AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA9.1AHM3_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 TPSMA9.1AHM3_B/I?
For technical support, including TPSMA9.1AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA9.1AHM3_B/I requirements.
6.How does Aetrix verify that TPSMA9.1AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA9.1AHM3_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 TPSMA9.1AHM3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA9.1AHM3_B/I?
All TPSMA9.1AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA9.1AHM3_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 TPSMA9.1AHM3_B/I part is unused and in its original packaging.
Return procedure for TPSMA9.1AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA9.1AHM3_B/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
