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Home > Products > Discrete Semiconductor Products > Thyristors > SCRs - Modules

Infineon Technologies TD61N12KOFHPSA1

Name: TD61N12KOFHPSA1
Brand: Infineon Technologies
SKU: TD61N12KOFHPSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TD61N12KOFHPSA1

Manufacturer:: Infineon Technologies

Category:: SCRs - Modules

Package:: Module

Datasheet:: TD61N12KOFHPSA1.pdf

Description:: SCR MODULE 1600V 120A MODULE

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Product details

Overview

TD61N12KOFHPSA1 from Infineon Technologies is a phase-control thyristor module rated for 1200 V repetitive peak off-state voltage (V_DRM/V_RRM) and 120 A RMS on-state current (I_TRMSM), with 60 A average on-state current at T_C = 85 °C. It features a 150 A/µs critical rate of rise of on-state current (di_T/dt)_cr, 1000 V/µs critical off-state voltage rise rate (dv_D/dt)_cr, and 125 °C maximum junction temperature - deployed in industrial AC power control, motor speed regulation, and heating system SCR bridges.

For engineers reviewing the TD61N12KOFHPSA1 datasheet, TD61N12KOFHPSA1 pinout, TD61N12KOFHPSA1 application, or TD61N12KOFHPSA1 equivalent, key selection criteria include gate trigger current (≤120 mA), on-state voltage (≤1.9 V at 300 A), thermal resistance (R_thJC ≤ 0.26 °C/W per module), surge current rating (1550 A, 10 ms), and UL E83336 listing for safety-compliant designs.

Technical Context

This thyristor module implements a press-pack silicon pellet design with aluminum nitride (AlN) internal insulation and dual-arm configuration for B2/B6 bridge topologies. It supports natural or forced cooling, with transient thermal impedance Z_thJC characterized for sinusoidal and rectangular conduction angles (0°–180°).

The device operates under line-commutated turn-off conditions with t_q = 120 µs (typ.) at full-rated current and 100 V reverse recovery voltage. Gate control requires precise timing (t_gd ≤ 3 µs) and meets DIN IEC 747-6 requirements for critical di/dt and dv/dt immunity.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM/V_RRM	1200 V - Maximum repetitive blocking voltage in forward/reverse direction, enabling use in 690 V AC three-phase systems with 2× safety margin.
I_TRMSM	120 A - RMS on-state current rating per arm, defining continuous thermal capability under 180° conduction at rated case temperature.
I_TAVM	60 A @ T_C = 85 °C - Average on-state current limit per arm, used for DC or low-conduction-angle thermal design.
(di_T/dt)_cr	150 A/µs - Minimum required commutation di/dt to prevent false turn-on during high-speed switching transients.
(dv_D/dt)_cr	1000 V/µs - Critical off-state voltage rise rate threshold, determining snubber design necessity in inductive loads.
R_thJC	0.26 °C/W (per module, 180° sin) - Junction-to-case thermal resistance, directly governing heatsink sizing for 125 °C max T_vj.
t_q	120 µs (typ.) - Line-commutated turn-off time, constraining minimum zero-crossing interval in phase-angle control loops.
V_T	1.9 V (max @ 300 A, T_vj = 125 °C) - On-state voltage drop, used to calculate conduction losses (P = I × V_T) in thermal modeling.

Pinout & Package

TD61N12KOFHPSA1 uses a press-pack module package with isolated copper baseplate, AlN ceramic insulation, and M1 mechanical mounting (4 Nm ±15%). Electrical terminals are M2 screw-type (4 Nm ±10%), with two main power terminals (anode/cathode per arm) and two isolated gate control terminals conforming to DIN 46244 A (2.8 × 0.8 mm contact area).

Pin/Terminal	Circuit Role	Design Meaning
Anode 1 (A1)	Main power terminal - Arm 1 anode	Carries forward current in first thyristor arm; electrically isolated from baseplate and other arm.
Cathode 1 (K1)	Main power terminal - Arm 1 cathode	Return path for Arm 1; shares common heatsink mounting but maintains isolation via AlN substrate.
Anode 2 (A2)	Main power terminal - Arm 2 anode	Second arm anode; enables dual-arm B2/B6 bridge operation without external isolation.
Cathode 2 (K2)	Main power terminal - Arm 2 cathode	Second arm cathode; independent thermal and electrical path from Arm 1 for balanced conduction.
G1, K1G	Gate control - Arm 1 gate & cathode reference	Isolated gate drive input referenced to Arm 1 cathode; requires ≤120 mA trigger current.
G2, K2G	Gate control - Arm 2 gate & cathode reference	Independent gate drive for Arm 2; galvanically separated to prevent cross-talk in multi-pulse firing.

Key Features

Feature	Design Value
Press-pack Si pellet construction	Enables high-current density and direct thermal coupling to heatsink without solder fatigue or bond-wire failure modes.
AlN internal insulation	Provides 2.5 kV RMS insulation test voltage (1 min) and creepage distance ≥12.5 mm for reinforced isolation in industrial environments.
UL E83336 listed	Validates compliance with UL 1557 for solid-state relays and power controllers, supporting safety-certified end equipment.
Transient thermal impedance model	Supplied Z_thJC analytical coefficients (7-term Foster network) enable accurate dynamic thermal simulation in SPICE or MATLAB.
B2/B6 bridge optimized ratings	Specified I_D curves for two-pulse (B2) and six-pulse (B6) configurations allow direct selection without derating assumptions.

Applications

Industrial AC Motor Drives

Three-Phase Heating Control

Use Scenario: Phase-angle controlled speed regulation of induction motors in HVAC blowers and conveyor systems operating from 380–690 V AC mains.

IC Role / Device Role / Timing Role: Main power switching element in anti-parallel thyristor pairs per phase, triggered synchronously with AC zero-crossing for precise torque control.

Use Value: 120 A RMS rating and 1550 A surge capacity support 30 kW motor drives with 2× overload margin; low R_thJC enables compact heatsink integration.

Use Scenario: Power modulation for resistive heating elements in industrial ovens, furnaces, and plastic extruders with 3-phase 690 V supply.

IC Role / Device Role / Timing Role: Six-pulse (B6) bridge thyristor in each phase leg, delivering variable RMS voltage to heater banks via firing angle adjustment.

Use Value: 1200 V V_DRM ensures safe operation with 2× overvoltage margin against 690 V AC line transients; UL listing simplifies CE/UL certification of heating systems.

DC Power Supply Rectification

Static VAR Compensation (SVC)

Use Scenario: High-current, line-commutated rectification in electroplating, anodizing, and battery charging systems requiring 500–1000 A DC output.

IC Role / Device Role / Timing Role: Dual-arm module configured as center-tap or bridge rectifier, conducting during positive/negative half-cycles with gate-triggered turn-on.

Use Value: 60 A average current per arm supports >100 kW rectifier stacks; t_q = 120 µs guarantees reliable commutation into highly inductive DC link chokes.

Use Scenario: Thyristor-Controlled Reactor (TCR) branch in utility-scale reactive power compensation systems interfacing with 11–33 kV distribution networks.

IC Role / Device Role / Timing Role: Back-to-back connected module pair per phase, dynamically adjusting fundamental current draw by varying firing angle in symmetrical waveform.

Use Value: 1000 V/µs (dv/dt)_cr prevents spurious triggering from fast grid transients; AlN isolation withstands 3 kV impulse tests per IEEE C37.90.1.

Equivalent & Alternatives

The following parts are listed as comparable options for similar phase-control thyristor module applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TT61N12KOFHPSA1	Same family; identical V_DRM, I_TRMSM, and R_thJC, but single-arm configuration (no second thyristor arm integrated).	Requires two separate modules for B6 bridge vs. one TD61N unit; increases PCB footprint and interconnect complexity.	Select TT61N only when modular redundancy or independent arm control is required.
DT61N12KOFHPSA1	Identical ratings but with K-suffix gate sensitivity variant: lower I_GT (≤80 mA) and V_GT (≤1.2 V), tighter V_T (≤1.8 V).	Better suited for low-power gate drivers and high-efficiency designs where conduction loss reduction is critical.	Choose DT61N when driving with microcontroller-based optocouplers or low-current isolated gate supplies.

Compared with TT61N and DT61N, TD61N12KOFHPSA1 provides integrated dual-arm topology for space-constrained B2/B6 bridges, while maintaining identical voltage/current ratings and thermal performance - eliminating inter-module matching concerns and reducing gate drive channel count by 50%.

Availability

TD61N12KOFHPSA1 is available at Aetrix Electronics and suitable for industrial AC motor drives, three-phase heating control, and static VAR compensation systems requiring stable component supply, long-life reliability, and UL-listed isolation integrity.

Supply support for TD61N12KOFHPSA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy applications.

TD61N belongs to Infineon's BIP AC thyristor module product line, engineered specifically for high-reliability, high-power phase-angle control in industrial power electronics - emphasizing thermal robustness, gate drive simplicity, and safety-certified isolation.

FAQ

What is the maximum allowable case temperature for TD61N12KOFHPSA1?

The maximum allowable case temperature is not fixed but depends on load conditions: at 60 A average current (I_TAVM), T_C must not exceed 85 °C; at lower currents, it may rise to 125 °C provided junction temperature remains ≤125 °C. Thermal derating curves in the datasheet define exact limits for sinusoidal and rectangular conduction angles.

Does TD61N12KOFHPSA1 require a heatsink? If so, what thermal resistance is recommended?

Yes - mandatory heatsinking is required. For natural cooling with KM14 heatsink (50 W rating), R_thCH ≤ 0.08 °C/W per module is needed; for forced cooling with Papst 4650N fan, R_thCH ≤ 0.16 °C/W per arm suffices. Total R_thJA must ensure T_vj ≤ 125 °C under worst-case I_TRMSM and ambient conditions.

Can TD61N12KOFHPSA1 be used in asymmetrical half-wave configurations?

No - TD61N12KOFHPSA1 is designed exclusively for symmetrical full-wave operation in B2 (two-pulse) or B6 (six-pulse) bridge topologies. Its dual-arm structure assumes balanced conduction; asymmetrical firing risks unequal thermal stress, premature failure, and violates the device's specified I²t and t_q ratings.

What gate drive voltage and current are required to reliably trigger TD61N12KOFHPSA1?

A minimum gate trigger current of 120 mA (I_GT) at ≤1.4 V (V_GT) is required at 25 °C. For robust operation across temperature and aging, designs should deliver ≥200 mA peak current with ≥5 V open-circuit voltage using pulse widths ≥20 µs and di/dt ≥1 A/µs, per DIN IEC 747-6 compliance.

TD61N12KOFHPSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: Module

Packaging:: Tray

Product Status:: Obsolete

Structure:: Series Connection - SCR/Diode

Number of SCRs, Diodes:: 1 SCR, 1 Diode

Voltage - Off State:: 1.6 kV

Current - On State (It (AV)) (Max):: 60 A

Current - On State (It (RMS)) (Max):: 120 A

Voltage - Gate Trigger (Vgt) (Max):: 1.4 V

Current - Gate Trigger (Igt) (Max):: 120 mA

Current - Non Rep. Surge 50, 60Hz (Itsm):: 1550A @ 50Hz

Current - Hold (Ih) (Max):: 200 mA

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Chassis Mount

TD61N12KOFHPSA1 FAQ

1.How can I place an order for TD61N12KOFHPSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TD61N12KOFHPSA1 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 TD61N12KOFHPSA1 reliable?

The price and inventory of TD61N12KOFHPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TD61N12KOFHPSA1 is usually 5 days.

3.What payment methods are accepted for TD61N12KOFHPSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TD61N12KOFHPSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TD61N12KOFHPSA1?

TD61N12KOFHPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TD61N12KOFHPSA1 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 TD61N12KOFHPSA1?

For technical support, including TD61N12KOFHPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TD61N12KOFHPSA1 requirements.

6.How does Aetrix verify that TD61N12KOFHPSA1 is sourced from the original manufacturer or authorized distributors?

All TD61N12KOFHPSA1 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 TD61N12KOFHPSA1 meets industry standards.

7.What is the process for return or replacement of TD61N12KOFHPSA1?

All TD61N12KOFHPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TD61N12KOFHPSA1, 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 TD61N12KOFHPSA1 part is unused and in its original packaging.

Return procedure for TD61N12KOFHPSA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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